FILED OF INVENTION
[001] The present disclosure generally relates to the field of soaps and detergents and in particular to a detergent bar comprising anionic surfactants. There is provided a composition of detergent bar with superior detergency and enhanced overall sensorials. 5
BACKGROUND OF INVENTION
[002] Detergent bars are widely used for cleaning fabric. However, common formulations for detergents are environmentally unsafe owing to their high phosphate content and also use of non-biodegradable branched chain alkyl sulfonate as surfactants. In particular, accumulation of detergent-based phosphate 10 in water bodies leads to eutrophication. Recent efforts have focussed on the development of bio-compatible detergent formulations.
[003] Detergent formulations are key components of fast moving consumer goods industry. Since the discovery of various sulfonate based surfactants for use in hard water, detergents have been in popular demand as powder, cake and liquid form. 15 Commercially available powder and cake bars are cost effective and generally affordable. However, repeated exposure to moisture tends to make, powders in particular, soggy and unusable. The repeated wetting of detergent bars also lead to the same problem of mush or sogginess. This loss of form of detergent bars is a major hurdle in gaining consumer satisfaction of the product. 20
[004] The present invention aims to tackle the aforementioned problems by providing a detergent bar composition that has high structural rigidity, low wear and tear and is environment-friendly.
SUMMARY OF THE INVENTION
[005] In an aspect of present invention, there is provided a detergent bar 25 comprising: (a) at least one anionic surfactant; (b) at least one builder; (c) at least one sequestering agent; and (d) at least one antimicrobial agent, wherein at least one anionic surfactant to at least one builder weight ratio is in the range of 1:0.55 – 1:0.84.
[006] In an aspect of present invention, there is provided a process for preparation 30 of the detergent bar comprising the steps of: (a) obtaining the at least one anionic
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surfactant; (b) obtaining the at least one builder; (c) obtaining the at least one sequestering agent; (d) obtaining the at least one antimicrobial agent, and (e) contacting the at least one anionic surfactant, the at least one builder, the at least one sequestering agent, the at least one antimicrobial agent to obtain the detergent bar. 5
[007] In an aspect of present invention there is provided a process for the preparation of a detergent bar comprising: (a) contacting at least one builder and at least one polymer softening agent to obtain a first mixture; (b) contacting at least one optical brightener and at least one anionic surfactant with the first mixture to obtain a second mixture; (c) contacting structurant with the second mixture to 10 obtain a third mixture; (d) contacting at least one filler with the third mixture to obtain a fourth mixture; (e) contacting at least one binder with the fourth mixture to obtain a fifth mixture; (f) contacting the fifth mixture with neutralizer to obtain a sixth mixture; (g) contacting the sixth mixture with water to obtain a seventh mixture; (h) contacting at least one opacifier with the seventh mixture to obtain an 15 eighth mixture; (i) contacting at least one anti soil-redeposition agent with the eighth mixture to obtain a ninth mixture; (j) contacting at least one sequestering agent with the ninth mixture to obtain a tenth mixture; (k) contacting at least one antimicrobial agent with the tenth mixture to obtain an eleventh mixture; (l) contacting at least one fragrance with the eleventh mixture to obtain a twelfth 20 mixture; (m) optionally contacting the twelfth mixture with water to obtain a thirteenth mixture; and (n) processing the thirteenth mixture to obtain the detergent bar.
[008] These and other features, aspects, and advantages of the present subject matter will be better understood with reference to the following description and 25 appended claims. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS 30
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[009] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and components.
[0010] Figure 1 illustrates the foam profile (stability of foam) for compositions A 5 to D, in accordance with an embodiment of the present disclosure.
[0011] Figure 2 illustrates the wear rate profile of compositions A to D, in accordance with an embodiment of the present disclosure.
[0012] Figure 3 illustrates the mush profile of compositions A to D, in accordance with an embodiment of the present disclosure. 10
[0013] Figure 4 illustrates the test for measurement of mush for compositions A to D, in accordance with an embodiment of the present disclosure.
[0014] Figure 5 illustrates panel rating data for soapiness, slipperiness, glide, foam, lubricity and softness for compositions A to D, in accordance with an embodiment of the present disclosure. 15
DETAILED DESCRIPTION OF THE INVENTION
[0015] Those skilled in the art will be aware that the present disclosure is subject to variations and modifications other than those specifically described. It is to be understood that the present disclosure includes all such variations and modifications. The disclosure also includes all such steps, features, compositions, 20 and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any or more of such steps or features.
Definitions
[0016] For convenience, before further description of the present disclosure, certain terms employed in the specification, and examples are delineated here. 25 These definitions should be read in the light of the remainder of the disclosure and understood as by a person of skill in the art. The terms used herein have the meanings recognized and known to those of skill in the art, however, for convenience and completeness, particular terms and their meanings are set forth below. 30
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[0017] The articles “a”, “an” and “the” are used to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article.
[0018] The terms “comprise” and “comprising” are used in the inclusive, open sense, meaning that additional elements may be included. It is not intended to be construed as “consists of only”. 5
[0019] Throughout this specification, unless the context requires otherwise the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated element or step or group of element or steps but not the exclusion of any other element or step or group of element or steps. 10
[0020] The term “including” is used to mean “including but not limited to”. “Including” and “including but not limited to” are used interchangeably. [0021] The term “at least one” is used to mean one or more and thus includes individual components as well as mixtures/combinations.
[0022] Ratios, concentrations, amounts, and other numerical data may be presented 15 herein in a range format. It is to be understood that such range format is used merely for convenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. For 20 example, a temperature ranges of about 25-40 °C should be interpreted to include not only the explicitly recited limits of about 25 °C to about 40 °C, but also to include sub-ranges, such as 25-30 °C, 28-38 °C, and so forth, as well as individual amounts, including fractional amounts, within the specified ranges, such as 25.2 °C, and 38.5 °C, for example. 25
[0023] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the disclosure, the preferred methods, and materials are now described. All 30 publications mentioned herein are incorporated herein by reference.
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[0024] The present disclosure is not to be limited in scope by the specific embodiments described herein, which are intended for the purposes of exemplification only. Functionally-equivalent products, compositions, and methods are clearly within the scope of the disclosure, as described herein.
[0025] As mentioned, an existing challenge in the manufacture of detergents 5 revolves structural stability of the detergent bar. Since, repeated exposure of the bar to water cannot be avoided, the modification of composition is needed to enhance the stability. The present invention overcomes these issues of bar compositions being prone to sogginess and loss of structural rigidity, by utilizing a unique anionic surfactant to builder ratio. Furthermore, the usage of various active 10 ingredients such as opacifier and anti-soil redeposition agent, allows the enhancement of visual appeal of the detergent bar composition, while maintaining its cleaning ability.
[0026] The detergent bar composition according to the present disclosure includes at least one anionic surfactant; at least one anionic builder; at least one sequestering 15 agent; and at least one antimicrobial agent.
[0027] The detergent bar composition according to the present disclosure includes at least one anionic surfactant; at least one anionic builder; at least one sequestering agent; and at least one antimicrobial agent, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the 20 range of 1:0.63–1:0.77.
[0028] In one non-limiting example, the detergent bar composition includes at least one anionic surfactant; at least one builder; at least one sequestering agent; at least one antimicrobial agent; and at least one cosmetically acceptable excipient selected from the group consisting of structurant, binder, anti-soil redeposition agent, 25 polymer softening agent, filler, opacifier, neutralizer, optical brightener, and fragrance.
[0029] In one non-limiting example, the detergent bar composition includes at least one anionic surfactant; at least one builder; at least one sequestering agent; at least one antimicrobial agent; and at least one cosmetically acceptable excipient 30 selected from the group consisting of structurant, binder, anti-soil redeposition
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agent, polymer softening agent, filler, opacifier, neutralizer, optical brightener, and fragrance, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55–1:0.84.
[0030] In one implementation, the detergent bar composition according to the present disclosure, has weight ratio of the at least one anionic surfactant to the at 5 least one builder in the range of 1:0.55-1:0.84. The weight ratio range of 1:0.55-1:0.84 is a broad range and sub ranges falling within this broad range are also contemplated by the instant disclosure. For instance, in one implementation, the weight ratio can be 1:0.55 – 1:0.82. In another implementation, the ratio can be in the range of 1:0.57 – 1:0.84. In yet another implementation, the ratio can be in the 10 range of 1:0.56 – 1:0.83.
[0031] In one implementation the detergent bar composition according to the present disclosure, has weight ratio of the at least one anionic surfactant to the at least one sequestering agent in the range of 1:0.16-1:0.28. The weight ratio range of 1:0.16-1:0.28 is a broad range and sub ranges falling within this broad range are 15 also contemplated by the instant disclosure. For instance, in one implementation, the weight ratio can be 1:0.16 – 1:0.26. In another implementation, the ratio can be in the range of 1:0.18 – 1:0.28. In yet another implementation, the ratio can be in the range of 1:0.17 – 1:0.27.
[0032] In one implementation, the detergent bar composition according to the 20 present disclosure, has weight ratio of the at least one anionic surfactant to the at least one antimicrobial agent in the range of 1:005 – 1: 0.063. The weight ratio range of 1:005 – 1: 0.063 is a broad range and sub ranges falling within this broad range are also contemplated by the instant disclosure. For instance, in one implementation, the weight ratio can be 1:0.005 – 1:0.061. In another 25 implementation, the ratio can be in the range of 1:0.007 – 1:0.063. In yet another implementation, the ratio can be in the range of 1:0.006 – 1:0.062.
[0033] Anionic surfactants are essential components in the detergent bar compositions. The present disclosure provides a detergent bar composition that includes at least one anionic surfactant selected from the group consisting of linear 30 alkyl benzene sulphonic acid (LABSA), alpha olefin sulphonates, petroleum
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sulphonates, alkyldiphenyloxide disulphonates. In one implementation, the anionic surfactants used in the detergent bar composition can be a combination of anionic surfactants as described above. In another implementation, the anionic surfactant is linear benzene sulfonic acid (LABSA). [0034] Builders as an ingredient are well known in the detergent bar compositions, 5 and normally include classes such as hydroxides, carbonates, sesquicarbonates, bicarbonates, borates, citrates, and silicates. In one implementation, at least one builder may be selected from the group consisting of alkali metal carbonate, sodium bicarbonate, and polycarboxylates. In another implementation, the builder used in the detergent bar composition may be a combination of the builders 10 mentioned above. In one implementation, the builder is sodium carbonate.
[0035] Sequestering agent binds to metal ions in water, thereby reducing hardness of water. In one implementation, at least one sequestering agent may be selected from the group consisting of sodium tripolyphosphate (STPP), nitrilotriacetic acid, ethylenediaminetetraacetic acid, and zeolite A. In another implementation, the 15 sequestering agent used in the detergent bar composition may be a combination of the sequestering agents mentioned above. In one implementation, the sequestering agent is sodium tripolyphosphate (STPP).
[0036] Antimicrobial agents are essential for detergent and soaps in order to maintain personal hygiene and prevention of diseases. Several infectious pathogens 20 such as salmonella and staphylococcus are known to spread via contaminated fabric. Hence, compatible herbal antimicrobial agents are especially sought for use in detergent bar compositions which can provide double benefit to the consumers of being effective and environmentally benign. In an implementation, at least one antimicrobial agents may be added in the detergent bar compositions. The 25 antimicrobial agents may be included from the group consisting of neem extract, thymol, terpeniol, moringa root bark extract, oregano extract, crepe ginger extract, chinese chaste tree extract. In another implementation, the detergent bar composition of the present disclosure, comprising an antimicrobial agent cleans effectively and is simultaneously capable of controlling microorganisms in order to 30 provide longer lasting effectiveness. In another implementation, the antimicrobial
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agent used in the detergent bar composition may be a combination of the sequestering agents mentioned above. In one implementation, the antimicrobial agent is neem extract.
[0037] In one implementation, the detergent bar composition includes linear benzene sulfonic acid (LABSA) as the anionic surfactant; sodium carbonate as the 5 builder; sodium tripolyphosphate (STPP) as the sequestering agent; neem extract as antimicrobial agent. The detergent bar composition may also include at least one excipient selected from the group consisting of stucturant, binder, anti-soil redeposition agent, polymer softening agent, filler, optical brightener, and fragrance. Further, combinations of the excipients may be used in the detergent bar 10 composition.
[0038] The detergent bar composition according to the present disclosure includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one anionic builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least 15 one sequestering agent having weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; and at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00 % with respect to the detergent bar.
[0039] The detergent bar composition according to the present disclosure includes at least one anionic surfactant having weight percentage in the range of 16.0 – 20 19.0% with respect to the detergent bar; at least one anionic builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; and at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00 % with respect to the detergent bar, in such a 25 way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84.
[0040] The detergent bar composition according to the present disclosure, includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar. The weight percentage range of 16.0 – 30 19.0% is a broad range and sub ranges falling within this broad range are also
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contemplated by the instant disclosure. For instance, in one implementation, the weight percentage can be 16.0 – 18.8%. In another implementation, the percentage can be in the range of 16.2 – 19.0%. In yet another implementation, the percentage can be in the range of 16.1 – 18.9%.
[0041] In an implementation, the detergent bar composition according to the 5 present disclosure includes at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar. The weight percentage range of 10.5 – 13.5% is a broad range and sub ranges falling within this broad range are also contemplated by the instant disclosure. For instance, in one implementation, the weight percentage can be 10.5 – 13.3%. In another 10 implementation, the percentage can be in the range of 10.7 – 13.5%. In yet another implementation, the percentage can be in the range of 10.6 – 13.4%.
[0042] The detergent bar composition according to the present disclosure includes at least one sequestering agent, having weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar. The weight percentage range of 3.0 – 4.5% 15 is a broad range and sub ranges falling within this broad range are also contemplated by the instant disclosure. For instance, in one implementation, the weight percentage can be 3.0 – 4.3%. In another implementation, the percentage can be in the range of 3.2 – 4.5%. In yet another implementation, the percentage can be in the range of 3.1 – 4.4%. 20
[0043] In yet another implementation, the weight percentage of the antimicrobial agent in the detergent bar composition is in the range of 0.01 – 1.00 % with respect to the detergent bar. The weight percentage range of 0.01 – 1.00% is a broad range and sub ranges falling within this broad range are also contemplated by the instant disclosure. For instance, in one implementation, the weight percentage can be 0.01 25 – 0.80%. In another implementation, the percentage can be in the range of 0.03 – 1.00%. In yet another implementation, the percentage can be in the range of 0.02 – 0.90%. [0044] The detergent bar may further include other excipients commonly used in detergent products. A typical listing of the classes of excipients comprise of 30 structurant, binder, anti-soil redeposition agent, polymer softening agent, filler,
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opacifier, neutralizer, optical brightener, and fragrance. Although, any of these aforementioned excipients can be individually used in the detergent bar compositions, examples comprising a combination of multiple of them is also contemplated to fall within the scope of instant disclosure.
[0045] In one implementation, the detergent bar composition includes at least one 5 anionic surfactant; at least one builder; at least one sequestering agent; at least one antimicrobial agent; and at least one excipient selected from the group consisting of structurant, binder, anti-soil redeposition agent, polymer softening agent, filler, opacifier, neutralizer, optical brightener, and fragrance, and combinations thereof. In another implementation, the at least one anionic surfactant to the at least one 10 builder weight ratio is in the range of 1:0.55 – 1:0.84; the at least one anionic surfactant to the at least one sequestering agent weight ratio is in the range of 1:0.16 – 1:0.28; and the at least one anionic surfactant to the at least one antimicrobial agent weight ratio is in the range of 1:005 – 1: 0.063. In yet another implementation, the weight ratios ranges of the at least one anionic surfactant to the 15 builder; the at least one anionic surfactant to the at least one sequestering agent; the at least one anionic surfactant to the at least one antimicrobial agent can be varied within the broad range. Thus, in one non-limiting example the range of the at least one anionic surfactant to the at least one builder may be in the range of 1:0.56-1:0.83; the ratio of the at least one anionic surfactant to the at least one 20 sequestering agent may be in the range of 1:0.17-1:0.27; the ratio of the at least one anionic surfactant to the at least one antimicrobial agent may be in the range of 1:0.006-1:0.062. Furthermore, the weight percentage of the at least one anionic surfactant with respect to the detergent bar is in the range of 16.0 – 19.0%, whereas the weight percentage of the at least one builder with respect to the detergent bar is 25 in the range of 10.5 – 13.5%; the weight percentage of the at least one sequestering agent with respect to the detergent bar is in the range of 3.0 – 4.5%; and the weight percentage of at least one antimicrobial agent with respect to detergent bar is in the range of 0.01 – 1.00%. In one implementation, the weight percentages can vary within the range mentioned, provided the weight ratio of the at least one anionic 30 surfactant to the at least one builder is within the range of 1:0.55 – 1:0.84; the
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weight ratio of the at least one anionic surfactant to the at least one sequestering agent is in the range of 1:0.16 – 1:0.28; the weight ratio of the at least one anionic surfactant to the at least one antimicrobial agent is in the ratio of 1:005 – 1: 0.063. Thus, in one non-limiting example the weight percentage of the at least one anionic surfactant with respect to the detergent bar, can be 16.4%, 16.8%, 17.2%, 17.6%, 5 18.0% and 18.4%; whereas the weight percentage of the at least one builder, with respect to the detergent bar can be 10.9%, 11.3%, 11.7%, 12.1%, 12.5% and 12.9%; and the weight percentage of the at least one sequestering agent, with respect to the detergent bar can be 3.2%, 3.4%, 3.6%, 3.8%, 4.0% and 4.2%; and the weight percentages, of the at least one antimicrobial agent can be 0.16%, 10 0.31%, 0.46%, 0.61%, 0.76% and 0.91%, provided the weight ratio of the at least one anionic surfactant to the at least one builder is in the range of 1:0.55 – 1:0.84; the at least one anionic surfactant to the at least one sequestering agent is in the range of 1:0.16 – 1:0.28; and the at least one anionic surfactant to the at least one antimicrobial agent is in the range of 1:005 – 1: 0.063. 15
[0046] Structurant are added to the composition for enhancing bar hardness. In one implementation, the structurant may be selected from the group consisting of aluminium sulphate, china clay, saturated C16-C18 fatty acids, and combinations thereof. In another implementation, at least one structurant used in the detergent bar composition may be a combination of the structurants mentioned above. In one 20 implementation, at least one structurant is added at a weight percentage in the range 0.1–1.5 % with respect to the detergent bar. In another implementation, the weight percentage of at least one structurant is 1.05 %. In yet another implementation, the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least one 25 antimicrobial agent, and at least one structurant, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In an implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight 30 percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least
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one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar, in such a way that the weight ratio of the at 5 least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84.
[0047] Binders play the role of an adhesive, by ensuring all components stay compacted together. In one implementation, at least one binder may be selected from the group consisting of kaolinite, also called as china clay, hydrated alumina 10 silicate. In another implementation, at least one binder used in the detergent bar composition may be a combination of the binders mentioned above. In one implementation, at least one binder is added at a weight percentage in the range 15.1–16.5 % with respect to the detergent bar. In another implementation, the weight percentage of at least one binder is 15.8%. In yet another implementation, 15 the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least one antimicrobial agent, and at least one binder, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In an implementation, the detergent bar composition includes at least one anionic 20 surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 25 1.00% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 % with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having 30 weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at
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least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage 5 in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 % with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. [0048] Anti-soil redeposition agent prevents dislodged soil from resettling on 10 fabric during washing. In one implementation, at least one anti-soil redeposition agent may be selected from the group consisting of include sodium silicate, carboxy methyl cellulose, sodium carboxy methyl polycarbonates. In another implementation, at least one anti-soil redeposition agent used in the detergent bar composition may be a combination of the anti-soil redeposition agents mentioned 15 above. In one implementation, at least one anti-soil redeposition agent is added at a weight percentage in the range 4.85–5.80% with respect to the detergent bar. In one implementation, the weight percentage of at least one anti-soil redeposition agent is 5.625%. In another implementation, the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least 20 one antimicrobial agent, and at least one anti-soil redeposition agent, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In an implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder 25 having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one anti-soil redeposition agent having weight percentage in the range 30 of 4.85–5.80% with respect to the detergent bar, in such a way that the weight ratio
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of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least 5 one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight 10 percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. [0049] Polymer softening agent prevent sogginess of detergent. In one 15 implementation, at least one polymer softening agent is selected from group consisting of a blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer, and combinations thereof. In another implementation, at least one polymer softening agent used in the detergent bar composition may be a combination of the polymer softening agent mentioned above. In one 20 implementation, at least one polymer softening agent is added at a weight percentage in the range 0.5–2.0 % with respect to the detergent bar. In another implementation, the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least one antimicrobial agent, and at least one polymer softening agent, in such a way that 25 the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In one implementation, the detergent bar compositon includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent 30 bar; at least one sequestering agent having the weight percentage in the range of 3.0
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– 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 0.5–2.0 % with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the 5 range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% 10 with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition 15 agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 1.0–1.5% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. 20 [0050] Fillers are inexpensive materials added in the detergent bar compositions to provide support (hardness) and to reduce cost of the overall composition. Calcium carbonate (also known as Calcite) is a well-known and often used filler component of detergent bars. At least one filler may be selected from the group consisting of calcite, dolomite, talc, silicate containing minerals. In another implementation, at 25 least one filler used in the detergent bar composition may be a combination of the fillers mentioned above. The total filler content, if included is typically up to 45.5% with respect to the detergent bar. In one implementation, the weight percentage of the filler in the detergent bar composition is in the range of 30 – 50%. In one implementation, the weight percentage of at least filler is 40 - 45 %. In another 30 implementation, the detergent bar composition includes at least one anionic
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surfactant, at least one builder, at least one sequestering agent, at least one antimicrobial agent, and at least one filler, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In an implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% 5 with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at 10 least one filler having weight percentage in the range of 30 – 50% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with 15 respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant 20 having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 1.0–1.5% with 25 respect to the detergent bar; and at least one filler having weight percentage in the range of 41.8 – 45.5% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. [0051] Opacifier are colorless substances that are used to make the ensuing 30 substance opaque. Though not common in soaps and detergents, such substances
18
can enhance the visual appeal of the colorants used in detergent bar formulations by providing an opaque background. In one implementation, at least one opacifier is titanium dioxide. In one implementation, at least one opacifier is added at a weight percentage in the range 0.5 – 5.0% with respect to the detergent bar. In another implementation, the detergent bar composition includes at least one anionic 5 surfactant, at least one builder, at least one sequestering agent, at least one antimicrobial agent, and at least one opacifier, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In one implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 10 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at 15 least one opacifier having weight percentage in the range of 0.5 – 5.0% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with 20 respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant 25 having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 1.0–1.5% with 30 respect to the detergent bar; and at least one filler having weight percentage in the
19
range of 41.8 – 45.5% with respect to the detergent bar; and at least one opacifier having weight percentage in the range of 0.5 – 1.0% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. [0052] Detergent formulations have various acidic components and hence can be 5 harsh on the skin. The addition of a neutralizer can effectively tackle this problem, while not compromising on the cleaning ability. Typically, hydrated lime or calcium hydroxide is employed as an environment-friendly neutralizer. In one implementation, at least one neutralizer is calcium hydroxide. In one implementation, at least one neutralizer is added at a weight percentage in the 10 range 0.1 – 1.0% with respect to the detergent bar. In another implementation, the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least one antimicrobial agent, and at least one neutralizer, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. 15 In one implementation, the detergent composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; 20 at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one neutralizer having weight percentage in the range of 0.5 – 1.0% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, 25 the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one 30 antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with
20
respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having 5 weight percentage in the range of 1.0–1.5% with respect to the detergent bar; and at least one filler having weight percentage in the range of 41.8 – 45.5% with respect to the detergent bar; and at least one opacifier having weight percentage in the range of 0.5 – 1.0% with respect to the detergent bar; and at least one neutralizer having weight percentage in the range of 0.1 – 0.5% with respect to the detergent 10 bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. [0053] Linen often turns yellow or off-white after wash. Optical brighteners or fluorescent whitening agents absorb ultraviolet light and re-emit blue light, providing a white appearance by cancelling the effect of the yellowing. In one 15 implementation, at least one optical brightener may be selected from the group consisting of disodium 2,2'-([1,1'-biphenyl]-4,4'-diyldivinylene) bis (benzenesulphonate), optical brightener LM-90. In another implementation, at least one optical brightener used in the detergent bar composition may be a combination of the optical brighteners mentioned above. In one implementation, at 20 least one optical brightener is added at a weight percentage in the range 0.05–1.00% with respect to the detergent bar. In one implementation, the weight percentage of at least one optical brightener is 0.14%. In yet another implementation, the detergent bar composition includes at least one anionic surfactant, at least one builder, at least one sequestering agent, at least one 25 antimicrobial agent, and at least one optical brightener, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In an implementation, of the detergent bar includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having 30 weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at
21
least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one optical brightener having weight percentage in the range of 0.05 – 1.00% with respect to the detergent bar, in such a way that the weight ratio of the at 5 least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In another implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least 10 one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight 15 percentage in the range of 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 1.0–1.5% with respect to the detergent bar; and at least one filler having weight percentage in the range of 41.8 – 45.5% with respect to the detergent 20 bar; and at least one opacifier having weight percentage in the range of 0.5 – 1.0% with respect to the detergent bar; and at least one neutralizer having weight percentage in the range of 0.1 – 0.5% with respect to the detergent bar, and at least one optical brightener having weight percentage in the range of 0.05–1.00% in such a way that the weight ratio of the at least one anionic surfactant to the at least 25 one builder is maintained in the range of 1:0.55 – 1:0.84. [0054] Optionally, additives such as fragrance and/or colorants may also be added to the detergent bar compositions. Fragrance and colorants are added as necessary and at weight percentages suitable for consumer acceptance. In one implementation, at least one fragrance is lemon fragrance. In another 30 implementation, at least one additive used in the detergent bar composition may be
22
a combination of the additives mentioned above. In another implementation, the composition may include additives from about 0.1 – 1.0 % weight percentage with respect to the detergent bar composition. In an implementation, the weight percentage of at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having 5 weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one fragrance having weight percentage in the range of 0.1 – 1.0 % 10 with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 1:0.55 – 1:0.84. In yet another implementation, the weight percentage of at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the 15 range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is 20 maintained in the range of 1:0.55 – 1:0.84.
[0055] In one implementation, the detergent bar composition includes at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar; at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar; at least one sequestering 25 agent having the weight percentage in the range of 3.0 – 4.5% with respect to the detergent bar; at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar; and at least one structurant having weight percentage in the range of the range of 0.1–1.5% with respect to the detergent bar; and at least one binder having weight percentage in the range of 30 15.1–16.5 %; and at least one anti-soil redeposition agent having weight percentage
23
in the range of 4.85–5.80% with respect to the detergent bar; and at least one polymer softening agent having weight percentage in the range of 1.0–1.5% with respect to the detergent bar; and at least one filler having weight percentage in the range of 41.8 – 45.5% with respect to the detergent bar; and at least one opacifier having weight percentage in the range of 0.5 – 1.0% with respect to the detergent 5 bar; and at least one neutralizer having weight percentage in the range of 0.1 – 0.5% with respect to the detergent bar, and at least one optical brightener having weight percentage in the range of 0.05–1.00%; at least one fragrance having weight percentage in the range of 0.1 – 1.0 %, in such a way that the weight ratio of the at least one anionic surfactant to the at least one builder is maintained in the range of 10 1:0.55 – 1:0.84.
[0056] In one implementation, the detergent bar composition may be prepared by a process as described, i.e., obtaining the at least one anionic surfactant; obtaining the at least one builder; obtaining the at least one sequestering agent; (d) obtaining the at least one antimicrobial agent, and (e) contacting the at least one anionic 15 surfactant, the at least one builder, the at least one sequestering agent, the at least one antimicrobial agent to obtain the detergent bar.
[0057] In one implementation, the detergent bar composition may be prepared by a process as described, i.e., contacting at least one builder and at least one polymer softening agent to obtain a first mixture; contacting at least one optical brightener 20 and at least one anionic surfactant with the first mixture to obtain a second mixture; contacting structurant with the second mixture to obtain a third mixture; contacting at least one filler with the third mixture to obtain a fourth mixture; contacting at least one binder with the fourth mixture to obtain a fifth mixture; contacting the fifth mixture with neutralizer to obtain a sixth mixture; contacting the sixth mixture 25 with water to obtain a seventh mixture; contacting at least one opacifier with the seventh mixture to obtain an eighth mixture; contacting at least one anti soil-redeposition agent with the eighth mixture to obtain a ninth mixture; contacting at least one sequestering agent with the ninth mixture to obtain a tenth mixture; contacting at least one antimicrobial agent with the tenth mixture to obtain an 30 eleventh mixture; contacting at least one fragrance with the eleventh mixture to
24
obtain a twelfth mixture; optionally contacting the twelfth mixture with water to obtain a thirteenth mixture; and processing the thirteenth mixture to obtain the detergent bar.
[0058] In an implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting at least one 5 builder and at least one polymer softening agent to obtain the first mixture at a temperature in the range of 15 – 35 °C. Typically, at least one builder and at least one polymer softening agent may be contacted at a temperature of 25 °C. Further the stirring speed may be in the range of 250 - 300 rpm for a period in the range of 1-10 minutes. In another implementation, at least one builder and at least one 10 polymer softening agent may be contacted at a temperature of 25 °C with a stirring speed in the range of 250-300 rpm for a period of 3 minutes to obtain a first mixture.
[0059] In an implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the at least 15 one optical brightener and the at least one anionic surfactant with first mixture to obtain the second mixture at a temperature in the range of 15 – 35 °C. Typically, the first mixture may be contacted with at least one optical brightener at a temperature of 25 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 10 minutes. In an implementation, at least one 20 optical brightener and at least one anionic surfactant may be contacted with first mixture at a temperature of 25 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes to obtain the second mixture.
[0060] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the second 25 mixture with at least one structurant to obtain the third mixture at a temperature in the range of 35 – 70 °C. Typically, the second mixture is contacted with at least one stucturant at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 10 minutes. In an implementation, at least one stucturant and the second mixture may be contacted at 30
25
a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes to obtain the third mixture.
[0061] In yet another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the third mixture with at least one filler to obtain the fourth mixture at a temperature in the 5 range of 35 – 70 °C. Typically the third mixture is contacted with at least filler at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 5-15 minutes. In an implementation, at least one filler and the third mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 10 minutes to obtain the 10 fourth mixture.
[0062] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the fourth mixture with at least one binder at a temperature to obtain the fifth mixture in the range of 35 – 70 °C. Typically, the fourth mixture is contacted with at least one 15 binder at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 5 – 30 minutes. In an implementation, at least one binder and the fourth mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 12 minutes to obtain the fifth mixture. 20
[0063] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the fifth mixture with at least one neutralizer to obtain the sixth mixture at a temperature in the range of 35 – 70 °C. Typically, the fifth mixture is contacted with at least one neutralizer at a temperature of 55 °C. Further the stirring speed may be in the range 25 of 250-300 rpm for a period in the range of 2 – 10 minutes. In an implementation, at least one neutralizer and the fifth mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes to obtain the sixth mixture.
[0064] In yet another implementation, the process of preparation of detergent bar 30 composition according to the present disclosure may include contacting the sixth
26
mixture with water to obtain the seventh mixture at a temperature in the range of 35 – 70 °C. Typically, the sixth mixture is contacted with water a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 5 – 10 minutes. In an implementation, the sixth mixture and water may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 5 rpm for a period of 8 minutes to obtain the seventh mixture.
[0065] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the seventh mixture with at least one opacifier to obtain the eighth mixture at a temperature in the range of 35 – 70 °C. Typically, the seventh mixture is contacted with at least 10 one opacifier at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 5 minutes. In an implementation, at least one opacifier and the seventh mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 4 minutes to obtain the eighth mixture. 15
[0066] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the eighth mixture with at least one anti-soil redeposition agent to obtain the ninth mixture at a temperature in the range of 35 – 70 °C. Typically, the eighth mixture is contacted with at least one anti-soil redeposition agent at a temperature of 55 °C. Further the 20 stirring speed may be in the range of 250-300 rpm for a period in the range of 10 – 25 minutes. In an implementation, at least one anti-soil redeposition agent and the eighth mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 19 minutes to obtain the ninth mixture.
[0067] In yet another implementation, the process of preparation of detergent bar 25 composition according to the present disclosure may include contacting the ninth mixture with at least one sequestering agent to obtain tenth mixture at a temperature in the range of 35 – 70 °C. Typically, the ninth mixture is contacted with at least one sequestering agent at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 10 30 minutes. In an implementation, at least one sequestering agent and the ninth
27
mixture may be contacted at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes to obtain the tenth mixture.
[0068] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting the tenth mixture with at least one antimicrobial agent to obtain the eleventh mixture at a 5 temperature in the range of 35 – 70 °C. Typically, the tenth mixture is contacted with at least one anti-microbial agent at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 10 minutes. In an implementation, at least one antimicrobial agent and the tenth mixture may be contacted at a temperature of 55 °C with a stirring speed in the 10 range of 250-300 rpm for a period of 8 minutes to obtain the eleventh mixture.
[0069] In yet another implementation, the process of preparation of detergent bar composition according to the present disclosure may include contacting at least one fragrance with the eleventh mixture to obtain the twelfth mixture at a temperature in the range of 35 – 70 °C. Typically the eleventh mixture is contacted with at least 15 one fragrance at a temperature of 55 °C. Further the stirring speed may be in the range of 250-300 rpm for a period in the range of 2 – 10 minutes. In an implementation, at least one fragrance is contacted with the eleventh mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 8 minutes to obtain the twelfth mixture. 20
[0070] In another implementation, the process of preparation of detergent bar composition according to the present disclosure may include the optional contacting of the twelfth mixture with water to obtain the thirteenth mixture at a temperature in the range of 35 – 70 °C. Typically, the twelfth mixture is contacted with water at a temperature of 55 °C. Further the stirring speed may be in the range 25 of 250-300 rpm for a period in the range of 5 – 10 minutes. In an implementation, water was contacted with the twelfth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 8 minutes to obtain the thirteenth mixture. In yet another implementation, the process of preparation of detergent bar composition according to the present disclosure may include 30 extruding the twelfth mixture or the thirteenth mixture at a temperature in the range
28
of 45 – 50 °C over a period of time in the range of 5 – 10 minutes, followed by cutting, stamping, and packaging to obtain the detergent bar. Typically, the twelfth mixture or the thirteenth mixture is extruded at a temperature of 48 °C.
[0071] In one implementation, the detergent bar composition may be prepared by a process as described, i.e., contacting at least one builder and at least one polymer 5 softening agent to obtain a first mixture at a temperature of 25 °C with a stirring speed in the range of 250-300 rpm for a period of 3 minutes; contacting at least one optical brightener and at least one anionic surfactant with the first mixture to obtain a second mixture at a temperature of 25 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes; contacting structurant with the second 10 mixture to obtain a third mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes; contacting at least one filler with the third mixture to obtain a fourth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 10 minutes; contacting at least one binder with the fourth mixture to obtain a fifth mixture at a temperature of 15 55 °C with a stirring speed in the range of 250-300 rpm for a period of 12 minutes; contacting at least one neutralizer with the fifth mixture to obtain a sixth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes; contacting the sixth mixture with water to obtain a seventh mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm 20 for a period of 8 minutes; contacting at least one opacifier with the seventh mixture to obtain an eighth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 4 minutes; contacting at least one anti-soil redeposition agent with the eighth mixture to obtain a ninth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period 25 of 19 minutes; contacting at least one sequestering agent with the ninth mixture to obtain a tenth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 5 minutes; contacting at least one antimicrobial agent with the tenth mixture to obtain an eleventh mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 8 minutes; 30 contacting at least one fragrance with the eleventh mixture to obtain a twelfth
29
mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 8 minutes; optionally contacting the twelfth mixture with water to obtain a thirteenth mixture at a temperature of 55 °C with a stirring speed in the range of 250-300 rpm for a period of 8 minutes; and detergent bar is finally obtained by extruding the twelfth or the thirteenth mixture at a temperature in the 5 range of 48 °C, followed by cutting, stamping, and packaging to obtain the detergent bar. In one implementation, the detergent bar composition provides a structurally robust bar which is impervious to sogginess and alkalinity-loss. In another implementation, the usage of environmentally benign ingredients such as linear alkyl benzene sulphonic acid (LABSA) and calcitemake the detergent bar 10 eco-friendly.
[0072] Although the subject matter has been described in considerable detail with reference to certain preferred implementation thereof, other implementations are possible.
EXAMPLES 15
[0073] The disclosure will now be illustrated with working examples, which is intended to illustrate the working of disclosure and not intended to take restrictively to imply any limitations on the scope of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this 20 disclosure belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice of the disclosed methods and compositions, the exemplary methods, devices and materials are described herein. It is to be understood that this disclosure is not limited to particular methods, and experimental conditions described, as such methods and conditions may apply. 25
[0074] Neem extract used in the detergent bar was procured from Ankur Herbals Pvt. Ltd.
Example 1
Preparation of detergent bar:
[0075] The detergent bar was prepared in a mixer by first adding 12.0 gm of 30 sodium carbonate (soda ash light), and 1.0 gm of polymer softening agent (a blend
30
of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer) at a temperature of 25°C, followed by mixing for a period of 3 minutes at a stirring speed in the range of 250 - 300 rpm to obtain a first mixture. To this mixture was added 0.14 gm of disodium 2,2'-([1,1'-biphenyl]-4,4'-diyldivinylene) bis (benzenesulphonate, 17.3 gm of 90% active linear alkyl benzene sulphonic acid 5 (LABSA) at a temperature of 25 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 5 minutes to obtain a second mixture. Structurant, i.e., 1.05 gm of aluminium sulphate was added to the second mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 5 minutes to obtain a third mixture. To this was added 41.1 10 gm of calcite at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 10 minutes to obtain fourth mixture. Further, 15.8 gm of china clay was added to the fourth mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 12 minutes to obtain a fifth mixture. Neutralizer, i.e., 0.625 gm of 15 calcium hydroxide, also called hydrated lime, was added to the fifth mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 5 minutes to obtain sixth mixture. Sufficient amount of water was added to the sixth mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 8 minutes to obtain 20 a seventh mixture. Opacifier, i.e., 1.1 gm of titanium dioxide, was added to the seventh mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 4 minutes to obtain eighth mixture. 5.625 gm of 45% sodium silicate was added to the eighth mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a 25 period of 19 minutes to obtain a ninth mixture. 4.2 gm of sequestering agent, sodium tripolyphosphate (STPP) was added to the ninth mixture at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 5 minutes to obtain a tenth mixture. 0.055 gm of neem extract was added to the tenth mixture at a temperature of 55 °C, followed by mixing at a stirring 30 speed in the range of 250 - 300 rpm for a period of 8 minutes to obtain eleventh
31
mixture. To this was added 0.05 gm of perfume at a temperature of 55 °C, followed by mixing at a stirring speed in the range of 250 - 300 rpm for a period of 8 minutes to obtain a twelfth mixture. Water was lost through evaporation due to the heat liberated during the reactions and the final water content of the twelfth mixture was adjusted if required at a temperature of 55°C, followed by mixing at a stirring 5 speed in the range of 250 - 300 rpm for a period of 8 minutes to obtain thirteenth mixture. Finally, the thirteenth mixture was processed by extruding the thirteenth mixture at a temperature of 48 °C, followed by cutting, stamping, and packaging into detergent bars.
Example 2 10
Detergent bar composition:
[0076] The present disclosure is, focused on obtaining detergent bar composition exhibiting improved detergency and overall enhanced sensorials. Each of the exemplified compositions (A-D) depicted in table 1 can be prepared by a process as described in Example 1. 15
[0077] Table 1 depicts the composition C of the present disclosure which had all the the necessary and optional ingredients with each of the ingredient set forth within the working weight percentage ranges. Composition A, B and D had weight percentage of several ingredients including anionic surfactant (LABSA), builder (sodium carbonate), a blend of derivatives of hyper branched polymer and 20 derivatives of hypo conjugated polymer and sequestering agent (sodium tripolyhosphate; STPP) beyond the working ranges. Polymer softening agent (a blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer) was crucial for the synthesis of a stable detergent bar and its absence (cases A and B) or its excessive use (case D) led to undesirable results. All the 25 above-mentioned discrepancies led to a detergent bar composition with undesirable characteristics which would be clearer from the discussion in the subsequent sections.
[0078] Table 1
32
S. No.
Ingredients
Working Range (weight percentage)
A
(% w/w)
B
(% w/w)
C (% w/w)
D
(% w/w)
1.
Sodium carbonate (light)
10.5 – 13.5
12.0
12.0
11.0
11.5
2.
polymer softnening agent (a blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer)
0.8 – 1.2
-
-
1.0
2.0
3.
Linear alkyl benzene sulphonic acid (LABSA; 90%)
16.0 – 19.0
17.3
17.4
17.0
16.8
4.
Sodium tripolyphosphate (STPP)
3.0 – 4.5
5.5
5.5
4.0
3.0
5.
China clay bright
15.1 – 16.5
15.8
15.8
15.8
15.8
6.
Calcite
30-50
38.85
39.5
42.45
41.6
7.
Aluminium sulphate
0.1-1.5
1.05
1.05
1.05
1.05
8.
Sodium silicate 45%
4.85 – 5.80
5.625
5.625
5.63
4.5
9.
Optical brightener ((disodium 2,2'-([1,1'-biphenyl]-4,4'-diyldivinylene) bis (benzenesulphonate))
0.05 – 1.00
0.225
0.12
0.08
0.1
33
10.
Neem extract
0.01-1.0
0.055
0.055
0.06
0.055
11.
Perfume lemon
0.1 – 1.0
0.5
12.
Neutralizer (hydrated lime)
0.1-1.0
0.625
0.625
0.63
0.625
13.
Polyox
-
-
0.15
-
-
14.
Supracare Bar
-
1.0
-
-
15.
Opacifier (titanium dioxide)
0.5-5.0
1.1
1.1
0.8
1.1
16.
EDTA 40% aq. soln. (Trilon B)
-
0.055
-
-
-
17.
Water
Q.S.*
Q.S.*
Q.S.*
Q.S.*
Q.S.*
*Quantity as much as is required to make the composition 100%.
[0079] Detergent bars are commonly associated with the problem of mushiness/sogginess when placed in contact with water and high wear rate. Herein, with a series of experimentation it was concluded that the unique surfactant to builder ratio along with sequestering agents, anti-soil redeposition agents and 5 polymer softening agent can bring about an excellent combination of desirable characteristics.
Example 3
Foam profiling: [0080] Extremely important parameter while considering the formulation of 10 detergent bar composition is the foaming ability. For example, while washing with a detergent bar there is a desire on the part of most consumers for a substantial amount of foam produced by a detergent bar. It is therefore, necessary to provide a detergent bar composition which produces foam in an optimum proportion so as to reassure the consumer without compromising on the detergent action of the 15 composition.
34
[0081] To determine the foam profile or foam stability of the several detergent bar compositions (A-D) a cylinder shaped method was employed, i.e., 8 % solution of the detergent bar was shaken perpendicularly for 15 times in a cylinder shaped apparatus, further the foam height was determined by measuring the height of foam developed in the cylinder. The results of the test conducted on the compositions A-5 D are depicted in Figure 1.
[0082] . In order to establish “good foam”, the foam height was determined as a function of time. Figure 1 clearly depicts that composition C and D had better foam stability than rest of the compositions. Since, the composition D did not meet the requirements as desired for mush profiling and consumer panel rating as described 10 below therefore, the composition D did not necessitate the requirement of superior detergent bar.
Example 4
Rate of wear profiling:
[0083] Measurement of wear rate or use-up rate is important, as it directly affect 15 the popularity of the product, i.e., detergent bar. Lower the percentage rate of wear, better is the structuring and binding of the bars, leading to more longevity to the bar.
[0084] It was measured by washing a pre-weighed bar for a set number and length of times and weighing the bar again. Figure 2 clearly indicates that the percentage 20 rate of wear was minimum for the composition C when compared to the rest of the compositions.
Example 5
Mush profiling: [0085] Mush is basically the softening/melting stage of detergent cake which 25 occurs due to the long contact of water. Keeping in view the practical use and consumer expectations mushiness should be lower but, on the other hand detergent bar with stone-like hardness is also undesirable.
[0086] Therefore, an experiment was carried out wherein mush or slough was measured by taking the bar prepared by above process and inserting it into a beaker 30
35
filled with water for 4 hours, followed by removing the soft part formed (“mush”) after 4 hours as shown in Figure 3.
[0087] The percentage of mush calculated is depicted with the help of a graph in Figure 4, and it is clearly evident from Figure 4 that the composition C has the lowest mush percentage among all the compositions A-D. 5
[0088] The inference drawn from the aforementioned experiments was that the Compositions C comprising of all the ingredients in the working range along with surfactant to builder ratio in the proposed range i.e., 1:0.63 – 1:0.77, had desired characteristics, i.e., low percentage of mush, low rate of wear and good stable foam. As a result, the detergent bar possessed definite shape, structural integrity 10 thereby exhibiting enhanced longevity of usage.
Example 6
Consumer panel rating:
[0089] Prepared compositions were rated by a panel of 20 people. A sensory study was conducted, wherein people in the panel were asked to use the detergent soap 15 compositions and give their ratings from 0-5 for each parameter, 0 being the lowest and 5 the highest. The parameters set for the consumer panel data are mentioned below:
(a) Soapiness
(b) Slipperiness 20
(c) Glide
(d) Foam
(e) Lubricity
(f) Softness.
[0090] The average result obtained from the panel data is demonstrated in Figure 5. 25 The analyses drawn from Figure 5, is that the composition C and D performed good in all sensorial parameters.
[0091] As is evident from Figure 2, 3 and 4, the composition A has high mush percentage, very high wear rate and quite low foam height. Also, the consumer panel rating for various skin sensorial was quite low (1 – 2) as shown by Figure 5. 30 Compositions A, having surfactant to sequestering agent ratio beyond the proposed
36
range besides the absence of A blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer, does not exhibit desired characteristics shown by the Figure 2, 3 and 4.
[0092] In composition D, all the ingredients were in working range as describe above, but A blend of derivatives of hyper branched polymer and derivatives of 5 hypo conjugated polymer was beyond working range. Despite showing appreciable foam stability, the composition was found to have higher percentage of mush, lower lubricity than composition C shown by Figure 2 and 5. The critical inclusion of A blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer into composition C, provided surprising improvement in its 10 stability as seen from the mush profiling. Composition C, was hence identified as the best performing example based on positive results from all the tests mentioned above.
Example 7
Anti-microbial analysis of detergent compositions 15
[0093] Clothing have potential to act as vehicles for pathogenic microorganisms including E.Coli and Salmonella. Dirty and contaminated clothing can also be responsible for the spread of several pathogens such as staphylococcus and yeast that can cause skin infections. The problem may be further compounded when dealing with hospital contaminated linen and fabric. It has been found that some 20 pathogens can stay virulent up to 6 weeks on fabric under normal conditions of temperature and humidity. Hence the antimicrobial action of a detergent is an important parameter.
[0094] Antimicrobial analysis was carried out by measuring both the zone of inhibition on bacterial agar plate, as well as the logarithmic reduction in the 25 bacterial population upon exposure to increasing concentration of detergent. The standard Kirby-Bauer disc diffusion testing method was used for assessing the zone of inhibition. The colony counting was carried out manually for determining the bacterial population, before and after exposure to the detergent formulation. For simplicity of reporting, logarithm of the same was estimated. The Table 2 enlists 30 the action of detergent formulation without neem extract against 6 common
37
pathogenic bacteria, namely Eschirichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), Staphylococcus aureus (S. aureus), Salmonella enterica (S. enterica), Micrococcus sp. and Bacillus sp.
Table 2
Micro-organism
1 mg/ml
2 mg/ml
3 mg/ml
4 mg/ml
5 mg/ml
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
E. coli
1.30 (1.3204)
2.50(0.4872)
3.25(0.8100)
4.50(1.2189)
4.75(1.7571)
P. aeruginosa
1.50 (0.4967)
2.50(0.6490)
3.50(0.9528)
4.25(1.3281)
5.25(2.0771)
S. aureus
1.50 (0.4930)
2.50(0.6005)
3.50(0.8177)
4.00(1.1951)
5.00(1.9200)
S. enterica
2.00 (0.1919)
2.50(0.3268)
3.25(0.5463)
4.25(0.8225)
4.75(1.6432)
Micrococcus sp.
1.50 (0.6865)
3.00(0.7700)
3.500(1.0528)
4.25(1.1181)
5.00(2.1597)
Bacillus sp.
1.80 (1.2223)
3.25(0.3080)
3.75(0.6025)
4.25(0.7293)
5.75(1.7036)
*zone of inhibition given in mm. 5
[0095] Anionic surfactants have microbicidal properties. The basal bactericidal ability of the detergent formulation is shown in Table 2. As can be seen, the formulation performs well against P. aeruginosa and Bacillus sp. in particular. However, in consideration of the risks associated with contaminated clothing, the addition of an antimicrobial agent is highly recommended in detergents. 10
[0096] Herbal extracts such as neem have several medicinal properties. Table 3 enlists the results from a similar analysis carried out with a detergent formulation consisting of neem extract to determine its antimicrobial ability.
38
Table 3
Micro-organism
1 mg/ml
2 mg/ml
3 mg/ml
4 mg/ml
5 mg/ml
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
Zone of inhibition* (Log reduction)
E. coli
2.50 (0.3656)
3.25(0.5006)
3.75 (0.8490)
4.50 (1.2833)
5.50 (1.8367)
P. aeruginosa
2.50 (0.5736)
3.50 (0.6703)
4.50 (1.0007)
4.75 (1.3879)
5.75 (2.1373)
S. aureus
1.50 (0.5041)
2.50 (0.6302)
3.00 (0.8633)
4.25 (1.2210)
5.75 (2.0422)
S. enterica
1.50 (0.1934)
3.50(0.3191)
4.00(0.5754)
5.50(0.9020)
5.75(1.7237)
Micrococcus sp.
2.30 (0.5875)
3.25(0.8243)
4.25(1.1079)
5.00(1.4878)
5.50(2.2871)
Bacillus sp.
2.00 (0.2630)
3.00(0.3946)
3.75(0.6366)
5.50(0.8246)
6.50(1.9347)
*zone of inhibition given in mm.
[0097] As can be seen from Table 2, the addition of a herbal neem extract produced surprising enhancement in the overall antimicrobial activity of the detergent composition. The composition was found to be effective against all 6 5 microorganisms tested. The enhancement was most apparent when comparing the concentration of 5mg/ml of detergent formulation. As an average, an almost 100-fold reduction of bacterial population was seen with the application of the detergent composition having neem extract. [0098] The present disclosure thus provides a stable detergent bar composition that 10 shows acceptable performance. It relies on the unique surfactant to builder ratio, surfactant to sequestering agent ratio and surfactant to polymer softening agent ratio to provide enhanced sensorials with decreased mushiness, wear rate and stable foam. Also, the phosphate content in composition is quite low as compared to other
39
commercial detergent bars, making it more environment-friendly. Furthermore, the usage of herbal neem extract provides enhanced antimicrobial qualities to the detergent bar. The additional use of excipients such as opacifiers and neutralizers not only improve the overall aesthetic appearance of the detergent bar, but also improve its cleaning ability. 5
[0099] Although the subject matter has been described in considerable detail with reference to certain examples and implementations thereof, other implementations are possible.

I/We Claim:
1. A detergent bar comprising:
(a) at least one anionic surfactant;
(b) at least one builder;
(c) at least one sequestering agent; and 5
(d) at least one antimicrobial agent,
wherein the at least one anionic surfactant to the at least one builder weight ratio is in the range of 1:0.55 – 1:0.84.
2. The detergent bar as claimed in claim 1, wherein the at least one anionic surfactant to the at least one sequestering agent weight ratio is in the range 10 of 1:0.16 – 1:0.28.
3. The detergent bar as claimed in claim 1, wherein the at least one anionic surfactant to the at least one antimicrobial agent weight ratio is in the range of 1:005 – 1: 0.063.
4. The detergent bar as claimed in claim 1, wherein the at least one anionic 15 surfactant is selected from the group consisting of linear alkyl benzene sulphonic acid (LABSA), alpha olefin sulphonates, petroleum sulphonates, alkyldiphenyloxide disulphonates, and combinations thereof.
5. The detergent bar as claimed in claim 1, wherein the at least one builder is selected from the group consisting of alkali metal carbonate, sodium 20 bicarbonate, polycarboxylates, and combinations thereof.
6. The detergent bar as claimed in claim 1, wherein the at least one sequestering agent is selected from the group consisting of sodium tripolyphosphate (STPP), nitrilotriacetic acid, ethylenediaminetetraacetic acid, and combinations thereof. 25
7. The detergent bar as claimed in claim 1, wherein the at least one antimicrobial agent is selected from the group consisting of neem extract, thymol, terpeniol, moringa root bark extract, oregano extract, crepe ginger extract, chinese chaste tree extract, and combinations thereof.
8. A detergent bar as claimed in claim 1 comprising: 30
41
(a) the at least one anionic surfactant having weight percentage in the range of 16.0 – 19.0% with respect to the detergent bar;
(b) the at least one builder having weight percentage in the range of 10.5 – 13.5% with respect to the detergent bar;
(c) the at least one sequestering agent having weight percentage in the 5 range of 3.0 – 4.5% with respect to the detergent bar; and
(d) the at least one antimicrobial agent having weight percentage in the range of 0.01 – 1.00% with respect to the detergent bar,
wherein the at least one anionic surfactant to the at least one builder weight ratio is in the range of 1:0.55 – 1:0.84. 10
9. The detergent bar as claimed in any of claims 1 – 8, further comprising at least one excipient selected from the group consisting of structurant, binder, anti-soil redeposition agent, polymer softening agent, filler, opacifier, neutralizer, optical brightener, and fragrance.
10. The detergent bar as claimed in claim 9, wherein the: (a) structurant has a 15 weight percentage in the range of 0.1–1.5% with respect to the detergent bar, and the structurant is selected from the group consisting of aluminium sulphate, saturated C16-C18 fatty acids, and combinations thereof; (b) binder has a weight percentage in the range of 15.1–16.5 % with respect to the detergent bar, and the binder is selected from the group consisting of 20 china clay, china clay, hydrated alumina silicate, and combinations thereof; (c) anti-soil redeposition agent has a weight percentage in the range of 4.85–5.80% with respect to the detergent bar, and the anti-soil redeposition agent is selected from the group consisting of sodium silicate, carboxy methyl cellulose, sodium carboxy methyl polycarbonates, and combinations 25 thereof; (d) polymer softening agent has a weight percentage in the range of 0.8–1.2% with respect to the detergent bar, and the polymer softening agent is selected from the group consisting of a blend of derivatives of hyper branched polymer and derivatives of hypo conjugated polymer, and combinations thereof; (e) filler has a weight percentage in the range of 30 –30 50 % with respect to the detergent bar, and the filler is selected from the
42
group consisting of calcite, dolomite, talc, silicate containing minerals, and combinations thereof; (f) opacifier has a weight percentage in the range of 0.5 – 1.0% with respect to the detergent bar and the opacifier is selected from the group consisting of titanium dioxide,; and (g) neutralizer has a weight percentage in the range of 0.1 – 1.0% with respect to the detergent 5 bar, and the neutralizer is hydrated lime; (h) optical brightener has a weight percentage in the range of 0.05–1.00% with respect to the detergent bar, and the optical brightener is selected from the group consisting of disodium 2,2'-([1,1'-biphenyl]-4,4'-diyldivinylene) bis (benzenesulphonate), optical brightener LM-90, and combinations thereof. 10
11. A process for preparation of the detergent bar as claimed in claim 1, comprising the steps of:
(a) obtaining the at least one anionic surfactant;
(b) obtaining the at least one builder;
(c) obtaining the at least one sequestering agent; 15
(d) obtaining the at least one antimicrobial agent, and
(e) contacting the at least one anionic surfactant, the at least one builder, the at least one sequestering agent, the at least one antimicrobial agent to obtain the detergent bar.
12. A process for the preparation of a detergent bar as claimed in any of claims 20 1 – 10, comprising the steps of: (a) contacting the at least one builder and the at least one polymer softening agent to obtain a first mixture; (b) contacting the at least one optical brightener and the at least one anionic surfactant with the first mixture to obtain a second mixture; (c) contacting the structurant with the second mixture to obtain a third mixture; (d) 25 contacting the at least one filler with the third mixture to obtain a fourth mixture; (e) contacting the at least one binder with the fourth mixture to obtain a fifth mixture; (f) contacting the fifth mixture with the neutralizer to obtain a sixth mixture; (g) contacting the sixth mixture with water to obtain a seventh mixture; (h) contacting the at least one opacifier with the seventh 30 mixture to obtain an eighth mixture; (i) contacting the at least one anti soil-
43
redeposition agent with the eighth mixture to obtain a ninth mixture; (j) contacting the at least one sequestering agent with the ninth mixture to obtain a tenth mixture; (k) contacting the at least one antimicrobial agent with the tenth mixture to obtain an eleventh mixture; (l) contacting the at least one fragrance with the eleventh mixture to obtain a twelfth mixture; 5 (m) optionally contacting the twelfth mixture with water to obtain a thirteenth mixture; and (n) processing the twelfth mixture or the thirteenth mixture to obtain the detergent bar.
13. The process as claimed in claim 11, wherein the: (a) contacting the at least one builder and the at least one polymer softening agent is carried out at a 10 temperature in the range of 15 – 35 °C, followed by mixing for a period in the range of 1 – 10 minutes; (b) contacting the at least one optical brightener and the at least one anionic surfactant with the first mixture is carried out at a temperature in the range of 15 – 35 °C, followed by mixing for a period in the range of 2 – 10 minutes; (c) contacting the structurant 15 with the second mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; (d) contacting the at least one filler with the third mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 5 – 15 minutes; (e) contacting the at least one binder with the 20 fourth mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 5 – 30 minutes; (f) contacting the fifth mixture with the neutralizer is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; (g) contacting the sixth mixture with water is 25 carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 3 – 10 minutes; (h) contacting the at least one opacifier with the seventh mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 5 minutes; (i) contacting the least one anti soil-redeposition agent with the 30 eighth mixture is carried out at a temperature in the range of 35 – 70 °C,
44
followed by mixing for a period in the range of 10 – 25 minutes; (j) contacting the at least one sequestering agent with the ninth mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; (k) contacting the at least one antimicrobial agent with the tenth mixture is carried out at a temperature in 5 the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; (l) contacting the at least one fragrance with the eleventh mixture is carried out at a temperature in the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; (m) optionally contacting the twelfth mixture with water is carried out at a temperature in 10 the range of 35 – 70 °C, followed by mixing for a period in the range of 2 – 10 minutes; and (n) processing the twelfth or the thirteenth mixture comprises extruding the twelfth mixture or the thirteenth mixture at a temperature in the range of 45 – 50 °C, followed by cutting, stamping, and packaging.