, Description:
TECHNICAL FIELD
[0001] The present invention relates generally to bathing compositions. More specifically, the present invention provides a rinse-free bathing composition that exhibits excellent cleansing activity, while being devoid of alcoholic solvents.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Bathing forms an essential part of daily routine for cleansing the body and removing dirt and germs. Bathing soaps and body baths are widely used worldwide for this purpose. Bathing compositions can broadly be classified into two types: bathing compositions that require rinsing with water (also known as “wet body baths”) to remove the lather along with dirt and rinse-free bathing compositions that do not require rinsing but generally wiped with a soft cloth.
[0004] While wet body baths are quite efficient, while they require the use of water, which is not feasible for several sections of persons like those who are bed-ridden or hospitalized. Further, wet body baths compositions generally contain alcohol and other harsh chemicals, which can cause skin dryness and are as such harmful.
[0005] Rinse-free compositions, on the other hand, are a great way to reduce or preclude use of water in cleansing the skin and other body parts. Since no water is required, rinse-free bathing compositions can be used even by people living in areas where water is scarce, including campers, backpackers, defence personnel in remote areas, and the like. These are also very useful in hospitals for providing a warm, comfortable patient-friendly bathing or sponging alternative (especially useful for bedridden patients).
[0006] However, existing rinse-free bathing compositions are largely inefficient in removing body odour, dirt, sweat, and germs. Further, unlike wet body baths, they leave behind residues that are difficult to remove. Moreover, the presence of harsh chemicals may cause skin rashes, itching and pH imbalance, leading to other skin problems. Further, the existing rinse-free bathing compositions contain strong fragrance and may make the skin dry, which may not be suitable for use on patients. So far, existence of such disadvantages has precluded large scale utilization/commercialization of the rinse-free bathing compositions.
[0007] There is therefore, a need in the art for a rinse-free bathing composition that is devoid of, or at least alleviates, the disadvantages associated with known rinse-free bathing compositions. Need is also felt of rinse-free bathing compositions that does not contain alcoholic solvents while exhibiting the superior cleansing action over the bodily surfaces without leaving behind any undesirable residue or odor.

OBJECTS OF THE INVENTION
[0008] An object of the present disclosure is to provide a rinse-free bathing composition that satisfies the existing needs, as well as emerging ones, and generally overcomes the deficiencies found in the prior art.
[0009] Another object of the present disclosure is to provide a rinse-free bathing composition that is free from alcoholic solvents.
[0010] Another object of the present disclosure is to provide a rinse-free bathing composition that is free from harsh chemicals.
[0011] Another object of the present disclosure is to provide a rinse-free bathing composition that exhibits superior cleansing action over bodily surfaces.
[0012] Another object of the present disclosure is to provide a rinse-free bathing composition that exhibits minimum lather.
[0013] Another object of the present disclosure is to provide a rinse-free bathing composition that leaves the skin moisturized post cleansing.

SUMMARY
[0014] The present invention relates generally to bathing compositions. More specifically, the present invention provides a rinse-free bathing composition that exhibits excellent cleansing activity, while being devoid of alcoholic solvents.
[0015] The present disclosure is based, at least in part, on the premise of unexpected discovery that a bathing composition including a surfactant combination including an effective amount of cocamidopropyl betaine and capryl glucoside exhibits synergistic activity, wherein the combination exhibits a surprisingly low foaming index (that indicates low amount of lather that may be advantageous for realizing rinse-free bathing compositions) when compared to utilization thereof individually without jeopardizing overall cleaning efficacy of the composition.
[0016] An aspect of the present disclosure provides a rinse-free bathing composition including a synergistic surfactant combination comprising cocamidopropyl betaine in an amount ranging from 1.3% to 1.9% by weight of the bathing composition and capryl glucoside in an amount ranging from 1.3% to 1.8% by weight of the bathing composition. In an embodiment, the composition is devoid of alcoholic solvent. In an embodiment, the composition further includes at least one preservative selected from the group consisting of methyl paraben, propyl paraben, diazolidinyl urea, ethylparaben, butylparaben, benzylparaben, isopropylparaben, isobutylparaben, DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid and phenoxyethanol or analogue thereof. In an embodiment, the composition further includes at least one humectant selected from the group consisting of propylene glycol, glycerine, plant oils, lactic acid and panthenol. In an embodiment, the composition further includes at least one modifier selected from the group consisting of citric acid, disodium EDTA and sodium hydroxide. In an embodiment, the composition further includes a fragrance. In an embodiment, the composition is devoid of paraben preservatives.
[0017] In an embodiment, the composition includes, by weight of the composition: propylene glycol - 2%; capryl glucoside - 1.5%; cocamidopropyl betaine - 1.5%; phenoxyethanol - 1%; sodium benzoate - 1%; citric acid - 0.5%; disodium EDTA - 0.5%; fragrance - 0.1%; and water in a quantity sufficient to make 100%.
[0018] In an embodiment, the composition includes, by weight of the composition: propylene glycol - 2%; capryl glucoside - 1.8%; cocamidopropyl betaine - 1.5%; methyl paraben – 0.07%; propyl paraben – 0.07%; diazolidinyl urea – 0.07%; citric acid - 0.5%; glycerine – 1.42%; fragrance - 0.1%; and water in a quantity sufficient to make 100%.
[0019] In an embodiment, the fragrance is selected from the group consisting of limonene, linalool, citronellol and butylphenyl methylpropional.
[0020] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiment/s, along with the accompanying drawing figures in which like numerals represent like components.

DETAILED DESCRIPTION
[0021] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0022] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the “invention” may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the “invention” will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0023] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0024] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0025] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0026] The present invention relates generally to bathing compositions. More specifically, the present invention provides a rinse-free bathing composition that exhibits excellent cleansing activity, while being devoid of alcoholic solvents.
[0027] The present disclosure is based, at least in part, on the premise of unexpected discovery that a bathing composition including a surfactant combination including an effective amount of cocamidopropyl betaine and capryl glucoside exhibits synergistic activity, wherein the combination exhibits a surprisingly low foaming index (that indicates low amount of lather, which may be advantageous for realizing rinse-free bathing compositions) when compared to utilization thereof individually without jeopardizing overall cleaning efficacy of the composition.
[0028] An aspect of the present disclosure provides a rinse-free bathing composition including a synergistic surfactant combination comprising cocamidopropyl betaine in an amount ranging from 1.3% to 1.9% by weight of the bathing composition and capryl glucoside in an amount ranging from 1.3% to 1.8% by weight of the bathing composition. In an embodiment, the composition is devoid of or substantially devoid of alcoholic solvents.
[0029] In an embodiment, the composition further includes at least one preservative selected from the group consisting of methyl paraben, propyl paraben, diazolidinyl urea, ethylparaben, butylparaben, benzylparaben, isopropylparaben, isobutylparaben, DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid and phenoxyethanol or analogue thereof. However, a person skilled in the art would appreciate that any other preservatives as known to a person skilled in the art can be utilized to serve its intended purpose without departing from the scope and spirit of the present disclosure.
[0030] In an embodiment, the composition further includes at least one humectant selected from the group consisting of propylene glycol, glycerine, plant oils, lactic acid and panthenol. In an embodiment, the composition further includes at least one modifier selected from the group consisting of citric acid, disodium EDTA and sodium hydroxide. In an embodiment, the composition further includes a fragrance. In an embodiment, the composition is devoid of paraben preservatives. However, it should appreciated that any other preservatives as known to a person skilled in the art can be utilized to serve its intended purpose without departing from the scope and spirit of the present disclosure.
[0031] In an embodiment, the composition includes, by weight of the composition: propylene glycol - 2%; capryl glucoside - 1.5%; cocamidopropyl betaine - 1.5%; phenoxyethanol - 1%; sodium benzoate - 1%; citric acid - 0.5%; disodium EDTA - 0.5%; fragrance - 0.1%; and water in a quantity sufficient to make 100%.
[0032] In an embodiment, the composition includes, by weight of the composition: propylene glycol - 2%; capryl glucoside - 1.8%; cocamidopropyl betaine - 1.5%; methyl paraben – 0.07%; propyl paraben – 0.07%; diazolidinyl urea – 0.07%; citric acid - 0.5%; glycerine – 1.42%; fragrance - 0.1%; and water in a quantity sufficient to make 100%.
[0033] In an embodiment, the fragrance is selected from the group consisting of limonene, linalool, citronellol and butylphenyl methylpropional. However, it should appreciated that any other preservatives as known to a person skilled in the art can be utilized to serve its intended purpose without departing from the scope and spirit of the present disclosure.
[0034] Preferably, the bathing compositions realized in accordance with embodiments of the present disclosure are prepared in a semi-solid or a liquid form with desired viscosity. Most preferably, the bathing compositions realized in accordance with embodiments of the present disclosure are prepared in liquid form. Nevertheless, the bathing compositions of the present disclosure can be prepared in powdered form and the same are completely within the scope of the present disclosure.
[0035] In an embodiment, the bathing compositions of the present disclosure exhibits a viscosity ranging from about 1 cps to about 2 cps, preferably between 1.5 cps to about 1.8 cps and most preferably, about 1.6 cps at room temperature (~30°C).
[0036] In an embodiment, the bathing compositions of the present disclosure exhibits pH ranging from about 6 to about 9, preferably, between 6.5 to about 8 and most preferably, about 6.9.
[0037] In an embodiment, the bathing compositions of the present disclosure has a total aerobic microbial count not more than 200 cfu/ml, preferably, the total aerobic microbial count is less than 100 cfu/ml and most preferably, total aerobic microbial count is less than 50 cfu/ml. In an embodiment, the bathing compositions of the present disclosure has total mould and yeast count less than 10 cfu/ml, preferably, less than 5 cfu/ml and most preferably, less than 3 cfu/ml. In a preferred embodiment, the bathing compositions of the present disclosure are free from harmful organisms such as E.coli, Salmonella and Pseudomonas.
[0038] The rinse-free bathing compositions as realized in accordance with embodiments of the present disclosure can be used in any manner as known to a person skilled in the art. Preferably, the compositions can be directly applied to the bodily surfaces (skin) until the area is wet enough followed by gentle massaging. Subsequently, any cloth or sponge or wipe (dry or wet) can be utilized to clean the bodily surfaces to effect removal of dirt or soil and the bathing composition. The term “rinse-free bathing composition” as used herein throughout the present disclosure denotes the bathing or cleansing compositions that do not require utilization of water or require minimal amount of water (such as use of wet cloth or sponge or wipe) to effect removal of dirt or soil along with the composition.
[0039] The advantageous synergistic combination of surfactants of the present disclosure, though described as to be used to formulate rinse-free bathing compositions, the same can be advantageously utilized to realize any other bathing or cleansing compositions without departing from the scope and spirit of the present disclosure. The procedure and ingredients that may be required to prepare such compositions are well within the reach of the person skilled in the pertinent art and the same are not described in detail for the sake of simplification.
[0040] The advantageous rinse-free bathing compositions as realized in accordance with embodiments of the present disclosure leave behind no residue, maintain the smoothness and the pH of the skin, do not cause skin dryness while completely cleansing the skin by removing dirt, sweat, germs and odor, provide excellent moisturizing effect and reduce the microbiological count.
[0041] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

EXAMPLE
[0042] EXAMPLE 1 – Rinse-free bathing composition (Free of Alcohol and Parabens)
propylene glycol - 2%;
capryl glucoside - 1.5%;
cocamidopropyl betaine - 1.5%;
phenoxyethanol - 1%;
sodium benzoate - 1%;
citric acid - 0.5%;
disodium EDTA - 0.5%;
fragrance - 0.1%; and
water in a quantity sufficient to make 100%.
[0043] EXAMPLE 2 – Rinse-free bathing composition (Free of Alcohols)
propylene glycol - 2%;
capryl glucoside - 1.8%;
cocamidopropyl betaine - 1.5%;
methyl paraben – 0.07%;
propyl paraben – 0.07%;
diazolidinyl urea – 0.07%;
citric acid - 0.5%;
glycerine – 1.42%;
fragrance - 0.1%; and
water in a quantity sufficient to make 100%.
[0044] Foaming Index Measurement Apparatus
[0045] The Foaming indices for different compositions were determined with the help of a cylinder based apparatus.
[0046] The apparatus includes 6 parallel cylinders, each with an internal diameter of about 9 cm and a height of about 29 cm and are fixed to a rotating frame occupying equivalent positions in the frame. Each cylinder is provided with a graduated scale to measure the height of the foam of the composition under investigation. These cylinders are closed at the top with the help of a removable lid, wherein the lid is provided with a 5 mm hole to allow introduction of additives (soil composition). The hole is closed with a rubber bunk, when the cylinders are subjected to rotation. The frame holding the cylinders is rotated by an electric motor that rotates the fixed cylinders along an axis perpendicular to main axis of the cylinders, such that the cylinder is cut in the middle of their length, in the plane of the frame.
[0047] Compositions under investigation move or flow in the cylinder during rotation, thereby generating a turbulence that leads to the formation of foam. Cylinders were rotated at a rotation speed of about 20 rpm, by series of 10 rotations (each lasting for about 30 seconds) followed by a rest of 3 minutes between each series to allow a measure of the foam height (at the end of the 3 minutes). The foam height is determined by reading the graduated scale when the cylinders are in a vertical position after rotation:
[0048] Protocol for measuring Foaming Index of the given composition:
[0049] About 500 ml of composition to be investigated (maintained at 20 °C) was slowly poured into the cylinder by avoiding the formation of foam. The rotating frame holding the cylinders was rotated at a rotation speed of about 20 rotations per minute (rpm), by series of 10 rotations (each lasting for about 30 seconds) followed by a rest of 3 minutes between each series to allow a measure of the foam height (at the end of the 3 minutes).
[0050] Compositions under investigation:
Table 1: Foam Height Measurement for compositions
Composition ID Composition Foam Height
1 2.6 % v/v of capryl glucoside (in water) 2.3 cm
2 2.6 % v/v of Cocamidopropyl Betaine (in water) 2.7 cm
3 1.3 % v/v of Capryl glucoside + 1.3 % v/v of Cocamidopropyl Betaine (in water) 2.1 cm
4 3.7 % v/v of Capryl glucoside (in water) 2.8 cm
5 3.7 % v/v of Cocamidopropyl Betaine (in water) 3.2 cm
6 1.9 % v/v of Capryl glucoside + 1.8 % v/v of Cocamidopropyl Betaine (in water) 2.7 cm
7 3.0 % v/v of Capryl glucoside (in water) 2.6 cm
8 3.0 % v/v of Cocamidopropyl Betaine (in water) 3.0 cm
9 1.5 % v/v of Capryl glucoside + 1.5 % v/v of Cocamidopropyl Betaine (in water) 2.5 cm
10 2.4 %v/v of Capryl glucoside (in water) 2.1 cm
11 2.4 %v/v of Cocamidopropyl Betaine (in water) 2.4 cm
12 1.2 % v/v of Capryl glucoside + 1.2 % v/v of Cocamidopropyl Betaine (in water) 2.2 cm
13 4.0 %v/v of Capryl glucoside (in water) 3.2 cm
14 4.0 %v/v of Cocamidopropyl Betaine (in water) 3.7 cm
15 2.0 % v/v of Capryl glucoside + 2.0 % v/v of Cocamidopropyl Betaine (in water) 3.3 cm
16 Composition as prepared in Example 1 2.6 cm
17 Composition as prepared in Example 2 2.8 cm

[0051] Results presented as part of the Table 1 hereinabove clearly indicate that a surfactant combination including capryl glucoside (1.3% to 1.9% by wt. of the composition) and cocamidopropyl Betaine (1.3% to 1.8% by wt. of the composition) exhibits an exceptional synergistic behaviour in terms of surprisingly low foaming index when compared to utilization thereof individually.
[0052] Foam Maintenance Index Measurement
[0053] The Foam Maintenance index of compositions were determined with the help of a cylinder based apparatus utilized for foaming index determination experiment.
[0054] About 500 ml of composition to be investigated (maintained at 20 °C) was slowly poured into the cylinder by avoiding the formation of foam. The rotating frame holding the cylinders was rotated at a rotation speed of about 20 rotations per minute (rpm), by series of 10 rotations (each lasting for about 30 seconds) followed by a rest of 3 minutes between each series to allow a measure of the foam height (at the end of the 3 minutes).
[0055] To insure the availability of foam for a given period of time to serve its purpose of cleansing; a foam maintenance test was conducted. For this, an artificial soil composition was prepared for testing the bathing soap composition effectiveness.
[0056] Composition of Artificial sebum: An artificial sebum composition was used as an additive for measuring the sustainability of the foam formed in foaming index apparatus described above. Artificial sebum (including a combination of synthetic sebum and soil/clay) simulates greasy soils such as soils coming from the human skin, mixed with clay (bentonite). The weight ratio between synthetic sebum and clay is 10:4.
[0057] Composition for 850 g of synthetic sebum:
Table 2: Composition of Synthetic sebum
Sr. No. Ingredients Weight in gms
1 Palmitic acid 80
2 Stearic acid 40
3 Sebacid acid 45
4 Oleic acid 95
5 Linoleic acid 45
6 Paraffin wax (40-50°C) 90
7 Coconut oil (copprah) 95
8 Squalene 45
9 Mineral oil 180
10 Soja oil 45
11 Colza oil 90

[0058] The above ingredients (synthetic sebum) were placed in a glass beaker and heated to a temperature of about 80°C for 15 minutes, under magnetic stirring to obtain a transparent and light colour liquid and can be stored for several weeks as solid material after cooling. For the foam maintenance evaluations, the desired artificial sebum composition was prepared by melting about 10 g of synthetic sebum at a temperature of about 80°C followed by addition of about 4g of clay, under magnetic stirring.
[0059] Foam maintenance Test:
[0060] After the 10th series of (20 rotations + 3 minutes resting times), artificial sebum addition was effected by adding 5 droplets (about 0.15 g) of liquid and warm soil (80°C) into the cylinder. The cylinder was given 10 subsequent rotations at 20 rpm. The foam height was measured 3 minutes after the 10 rotations (total of 200+10=210 rotations). Repeat the artificial sebum addition implement with adding the artificial sebum just after the foam height measure and just before the subsequent rotation. This rotation, wait, measure, artificial sebum addition implement was repeated, until the foam height reaches a value of about 1.6 cm. Foam Maintenance Time (in seconds) required for foam to subside (i.e. decrease in height of foam) from initial 1.6 cm to 1.0 cm was measured in seconds. More time required to subside the foam indicates the stability of the composition to effectively clean the soil/dirt that need to cleaned from the human skin.

Table 3: Foam Maintenance Time (in seconds) for compositions
Composition
ID Composition Foam Maintenance Time (Seconds)
1 1.3 % v/v of Capryl glucoside + 1.3 % v/v of Cocamidopropyl Betaine (in water) 65
2 1.9 % v/v of Capryl glucoside + 1.8 % v/v of Cocamidopropyl Betaine (in water) 78
3 1.5 % v/v of Capryl glucoside + 1.5 % v/v of Cocamidopropyl Betaine (in water) 73
4 1.2 % v/v of Capryl glucoside + 1.2 % v/v of Cocamidopropyl Betaine (in water) 59
5 Composition as prepared in Example 1 67
6 Composition as prepared in Example 2 71

[0061] Results presented as part of the Table 1 and Table 3 hereinabove clearly indicate that a surfactant combination including capryl glucoside (1.3% to 1.9% by wt. of the composition) and cocamidopropyl betaine (1.3% to 1.8% by wt. of the composition) exhibits an exceptional synergistic behavior in terms of surprisingly low foaming index when compared to utilization thereof individually, while retaining its cleaning efficacy. Accordingly, the surfactant combination of the present invention is found to be of specific utility in the rinse-free body bath compositions.

ADVANTAGES OF THE INVENTION
[0062] The present disclosure provides a rinse-free bathing composition that is free from alcoholic solvents.
[0063] The present disclosure provides a rinse-free bathing composition that is free from alcoholic solvents.
[0064] The present disclosure provides a rinse-free bathing composition that is free from harsh chemicals.
[0065] The present disclosure provides a rinse-free bathing composition that exhibits superior cleansing action over bodily surfaces.
[0066] The present disclosure provides a rinse-free bathing composition that exhibits minimum lather.
[0067] The present disclosure provides a rinse-free bathing composition that leaves the skin moisturized post cleansing.

Claims:
1. A rinse-free bathing composition comprising:
a synergistic surfactant combination comprising cocamidopropyl betaine in an amount ranging from 1.3% to 1.9% by weight of the bathing composition and capryl glucoside in an amount ranging from 1.3% to 1.8% by weight of the bathing composition.
2. The composition as claimed in claim 1, wherein the composition is devoid of alcoholic solvent.
3. The composition as claimed in claim 1, wherein the composition further comprises at least one preservative selected from the group consisting of methyl paraben, propyl paraben, diazolidinyl urea, ethylparaben, butylparaben, benzylparaben, isopropylparaben, isobutylparaben, DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid and phenoxyethanol or analogue thereof.
4. The composition as claimed in claim 1, wherein the composition further comprises at least one humectant selected from the group consisting of propylene glycol, glycerine, plant oils, lactic acid and panthenol.
5. The composition as claimed in claim 1, wherein the composition further comprises at least one modifier selected from the group consisting of citric acid, disodium EDTA and sodium hydroxide.
6. The composition as claimed in claim 1, wherein the composition further comprises a fragrance.
7. The composition as claimed in claim 1, wherein the composition is devoid of paraben preservatives.
8. The composition as claimed in claim 1, wherein the composition comprises, by weight of the composition:
propylene glycol - 2%;
capryl glucoside - 1.5%;
cocamidopropyl betaine - 1.5%;
phenoxyethanol - 1%;
sodium benzoate - 1%;
citric acid - 0.5%;
disodium EDTA - 0.5%;
fragrance - 0.1%; and
water in a quantity sufficient to make 100%.
9. The composition as claimed in claim 1, wherein the composition comprises, by weight of the composition:
propylene glycol - 2%;
capryl glucoside - 1.8%;
cocamidopropyl betaine - 1.5%;
methyl paraben – 0.07%;
propyl paraben – 0.07%;
diazolidinyl urea – 0.07%;
citric acid - 0.5%;
glycerine – 1.42%;
fragrance - 0.1%; and
water in a quantity sufficient to make 100%.
10. The composition as claimed in any of the claims 1 through 9, wherein the fragrance is selected from the group consisting of limonene, linalool, citronellol and butylphenyl methylpropional.