The present invention relates generally to a shampoo composition. More specifically, the present invention provides a rinse-free shampoo composition that exhibits excellent hair cleansing activity, while being devoid of alcoholic solvents, parabens and harsh chemicals.
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] Shampoos form an essential part of daily routine for cleansing hairs and removing dirt and germs present on the scalp. Shampoo compositions can be broadly classified into two types: a) shampoo compositions that require rinsing with water (also known as "wet shampoo") to remove the lather along with dirt and b) rinse-free shampoo compositions that do not require rinsing, but generally wiped with a soft cloth.
[0004] Wet shampoos 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 shampoo compositions generally contain alcohol and other harsh chemicals, which can cause hair dryness and are as such harmful. Moreover, wet shampoos are often required to be used in conjunction with some conditioners, which give the hair a shiny look and help in maintaining the pH balance of the hair.
[0005] Rinse-free shampoo (also known as dry shampoos), on the other hand, are a great way to reduce or preclude use of water in in hair maintenance. Since no water is required, rinse-free shampoo can be used even by people living in areas where water is scarce, including campers, backpackers, defense personnel in remote areas, and the like.
[0006] However, existing rinse-free shampoo compositions are largely inefficient in removing odor, dirt, sweat, germs and oil. Unlike wet shampoos,

they leave behind residues that are difficult to remove. Further, the existing rinse-free shampoo compositions contain strong fragrance and make the hair and scalp skin dry, which may not be suitable for use on patients. Due to these reasons, dry shampoos have not become popular with consumers. So far, existence of such disadvantages has precluded large scale utilization/commercialization of the rinse-free shampoo compositions.
[0007] There is therefore, a need in the art for a rinse-free shampoo composition that is devoid of, or at least alleviates, the disadvantages associated with known rinse-free shampoo compositions. Need is also felt of rinse-free shampoo compositions that does not contain alcoholic solvents while exhibiting the superior cleansing action over the hair 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 shampoo
composition that satisfies the existing needs and generally overcomes the
deficiencies found in the conventional compositions.
[0009] Another object of the present disclosure is to provide a rinse-free
shampoo composition that is free from alcoholic solvents, parabens and harsh
chemicals.
[0010] Another object of the present disclosure is to provide a rinse-free
shampoo composition that is dermatologically safe for long term usage.
[0011] Another object of the present disclosure is to provide a rinse-free
shampoo composition that exhibits superior cleansing action over hair.
[0012] Another object of the present disclosure is to provide a rinse-free
shampoo composition, which is a clear solution with low haze.
[0013] Another object of the present disclosure is to provide a rinse-free
shampoo composition that leaves the hair and scalp moisturized post cleansing.

SUMMARY
[0014] The present invention provides a rinse-free shampoo composition that exhibits excellent hair cleansing activity, while being devoid of alcoholic solvents. [0015] An aspect of the present disclosure provides a rinse-free shampoo composition, said composition comprising: (a) a surfactant combination comprising cocamidopropyl betaine in an amount ranging from 1.0% to 1.2% by weight of the shampoo composition and TEA-lauryl sulfate in an amount ranging from 2.4%) to 2.6% by weight of the shampoo composition; (b) a preservative in an amount ranging from 0.05% to 1.5% by weight of the shampoo composition, said preservative not being a paraben preservative; (c) a humectant in an amount ranging from 0.5% to 2.5% by weight of the shampoo composition; (d) a modifier in an amount ranging from 0.05% to 0.25% by weight of the shampoo composition, said modifier selected from the group consisting of citric acid, dehydroacetic acid, disodium EDTA and sodium hydroxide; and (e) water in an amount ranging from 95% to 98% by weight of the shampoo composition. In an embodiment, the composition is devoid of an alcoholic solvent. [0016] In an embodiment, the humectant comprises any or a combination of: propylene glycol, glycerine, plant oils, lactic acid and panthenol. In an embodiment, the preservative comprises any or a combination of: diazolidinyl urea, DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid, benzyl alcohol and phenoxyethanol or analogue thereof. In an embodiment, the composition further comprises a fragrance. [0017] In an embodiment, the composition comprises, by weight of the composition: propylene glycol - 1.5%; TEA-Lauryl Sulfate - 2.5%; cocamidopropyl betaine - 1.1%; benzyl alcohol - 1.0%; dehydroacetic acid -0.05%; parfum - 0.02%; benzoic acid - 0.05%; disodium EDTA - 0.05%; sorbic acid - 0.05%; NaOH - 0.025% tocopherol - 0.005%; and water in a quantity sufficient to make 100%. In an embodiment, the composition is a clear solution with low haze.
[0018] 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
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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.

[0023] 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.
[0024] An aspect of the present disclosure provides a rinse-free shampoo composition, said composition comprising: (a) a surfactant combination comprising cocamidopropyl betaine in an amount ranging from 1.0% to 1.2% by weight of the shampoo composition and TEA-lauryl sulfate in an amount ranging from 2.4%) to 2.6% by weight of the shampoo composition; (b) a preservative in an amount ranging from 0.05% to 1.5% by weight of the shampoo composition, said preservative not being a paraben preservative; (c) a humectant in an amount ranging from 0.5% to 2.5% by weight of the shampoo composition; (d) a modifier in an amount ranging from 0.05% to 0.25% by weight of the shampoo composition, said modifier selected from the group consisting of citric acid, dehydroacetic acid, disodium EDTA and sodium hydroxide; and (e) water in an amount ranging from 95% to 98% by weight of the shampoo composition. In an embodiment, the composition is devoid of an alcoholic solvent. [0025] In an embodiment, the humectant comprises any or a combination of: propylene glycol, glycerine, plant oils, lactic acid and panthenol. In an embodiment, the preservative comprises any or a combination of: diazolidinyl urea, DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid, benzyl alcohol and phenoxyethanol or analogue thereof. In an embodiment, the composition further comprises a fragrance. [0026] In an embodiment, the composition comprises, by weight of the composition: propylene glycol - 1.5%; TEA-Lauryl Sulfate - 2.5%; cocamidopropyl betaine - 1.1%; benzyl alcohol - 1.0%; dehydroacetic acid -0.05%; parfum - 0.02%; benzoic acid - 0.05%; disodium EDTA - 0.05%; sorbic acid - 0.05%; NaOH - 0.025% tocopherol - 0.005%; and water in a quantity sufficient to make 100%.

[0027] In an embodiment, the composition further includes at least one anti-oxidant agent such as tocopherol, but not limited thereto. In an embodiment, the composition further includes at least one skin conditioning agent. [0028] In an embodiment, the fragrance (parfum) is selected from any or a combination of: eugenol, benzyl salicylate, coumarin, butylphenyl methylpropional, linalool, citronellol, hexylcinnamal, limonene, methyl 2-octylnoate, intense repair, absolute repair, lavender, rose and alpha isomethyl ionone. However, it should appreciated that any other fragrance as known to a person skilled in the art can be utilized to serve its intended purpose. [0029] In an embodiment, the shampoo compositions of the present disclosure exhibits a viscosity ranging from about 0.5 cps to about 3 cps, preferably between 0.7 cps to about 1.5 cps and most preferably, about 1.0 cps at room temperature (~30°C).
[0030] In an embodiment, the shampoo compositions of the present disclosure exhibits pH ranging from about 4.5 to about 7.0, preferably, between 4.8 to about 6.5 and most preferably, about 5.5.
[0031] In an embodiment, the shampoo compositions of the present disclosure has a total aerobic microbial count not more than 100 cfu/ml, preferably, the total aerobic microbial count is less than 50 cfu/ml. In an embodiment, the shampoo 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 shampoo compositions of the present disclosure are free from harmful organisms such as E.coli, Salmonella and Pseudomonas. [0032] The rinse-free shampoo 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 hairs 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 shampoo composition. The term "rinse-free shampoo composition" as used herein throughout the present disclosure denotes the shampoo 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.
[0033] The advantageous rinse-free shampoo compositions as realized in
accordance with embodiments of the present disclosure leave behind no residue,
maintain the smoothness and the pH of the hair, do not cause hair or scalp dryness
while completely cleansing the hair by removing dirt, sweat, germs and odor,
provide excellent moisturizing effect and reduce the microbiological count.
EXAMPLE
[0034] EXAMPLE 1 - Rinse-free shampoo composition (Free of Alcohol
and Parabens)
Propylene glycol - 1.5%;
TEA-Lauryl Sulfate - 2.5%;
cocamidopropyl betaine - 1.1%;
benzyl alcohol - 1.0%;
dehydroacetic acid - 0.05%;
sorbic acid - 0.05%
parfum - 0.02%;
benzoic acid - 0.05%;
disodium EDTA - 0.05%;
NaOH- 0.025%
tocopherol acetate - 0.005%; and
water in a quantity sufficient to make 100%). [0035] 10 kg batch of the rinse-free shampoo was prepared by taking 7500 gm of purified water in a vessel. Each of 5 gm sorbic acid, 5 gm benzoic acid, 100 gm benzyl alcohol, 150 gm propylene glycol, 5 gm of disodium EDTA, 110 gm of cocamidopropyl betaine, 0.5 gm of tocopherol acetate, and 2 gm of fragrance (parfum) were sequentially added to the vessel with continuous stirring at 1500 RPM and at a temperature of 65-70°C for 10-15 minutes to prepare a first pre-mix. 2.5 gm of sodium hydroxide was dissolved separately in 500 mL of purified water, and then 5 gm of dehydroacetic acid was dissolved therein to prepare a

second pre-mix. The second pre-mix was then mixed with the first pre-mix to
prepare a third pre-mix.
[0036] 250 gm of TEA-lauryl sulfate was then mixed with the third pre-mix
while stirring at about 100 RPM and maintaining temperature at 65-70°C for 10-
15 minutes. Remaining water was then mixed therewith while continuing the
stirring and pH of the formulation was adjusted to 5.5 using NaOH.
[0037] Foaming Index Measurement Apparatus
[0038] The Foaming indices for different compositions were determined with
the help of a cylinder based apparatus.
[0039] 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.
[0040] 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:
[0041] Protocol for measuring Foaming Index of the given composition:
[0042] 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). [0043] Compositions under investigation:
Table 1: Foam Height Measurement for compositions

Composition ID Composition Foam Height (in cm)
1 3.6%v/vofTEA-Lauryl Sulfate (in water) 4.0
2 3.6 % v/v of Cocamidopropyl Betaine (in water) 3.8
3 2.5% v/v of TEA-Lauryl Sulfate + 1.1 % v/v of Cocamidopropyl Betaine (in water) 6.8
4 2.5% v/v of TEA-Lauryl Sulfate + 1.0 % v/v of Cocamidopropyl Betaine (in water) 6.0
5 Composition as prepared in Example 1 7.0
[0044] Foam Maintenance Index Measurement
[0045] The Foam Maintenance indices of compositions were determined with
the help of a cylinder based apparatus utilized for foaming index determination
experiment.
[0046] 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).
[0047] To ensure 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 shampoo composition
effectiveness.
[0048] 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 scalp, mixed with clay (bentonite). The weight ratio
between synthetic sebum and clay was 10:4.
[0049] 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 Sojaoil 45
11 Colza oil 90
[0050] 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. [0051] Foam maintenance Test:
[0052] 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 hair and scalp.
Table 3: Foam Maintenance Time (in seconds) for compositions

Composition ID Composition Foam Maintenance Time (Seconds)
1 2.5% v/v of TEA-Lauryl Sulfate +1.1 % v/v of Cocamidopropyl Betaine (in water) 90
2 2.5 % v/v of TEA-Lauryl Sulfate + 1.0 % v/v of Cocamidopropyl Betaine (in water) 62
3 Composition as prepared in Example 1 95
[0053] It could also be noted that the composition of Example 1 exhibits surprisingly low haze, greatly improving the consumer acceptance.

[0054] 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.
ADVANTAGES OF THE INVENTION
[0055] The present disclosure provides a rinse-free shampoo composition
that is free from alcoholic solvents, parabens and harsh chemicals.
[0056] The present disclosure provides a rinse-free shampoo composition
that is dermatologically safe for long term usage.
[0057] The present disclosure provides a rinse-free shampoo composition
that is a clear solution with low haze.
[0058] The present disclosure provides a rinse-free shampoo composition
that exhibits superior cleansing action over hair.
[0059] The present disclosure provides a rinse-free shampoo composition
that leaves the hair and scalp moisturized post cleansing.

We Claim:

1. A rinse-free shampoo composition, said composition comprising:
a surfactant combination comprising cocamidopropyl betaine in an
amount ranging from 1.0% to 1.2% by weight of the shampoo
composition and TEA-lauryl sulfate in an amount ranging from 2.4%
to 2.6%) by weight of the shampoo composition;
a preservative in an amount ranging from 0.05% to 1.5% by weight of
the shampoo composition, said preservative not being a paraben
preservative;
a humectant in an amount ranging from 0.5% to 2.5% by weight of the
shampoo composition;
a modifier in an amount ranging from 0.05% to 0.25% by weight of
the shampoo composition, said modifier selected from the group
consisting of citric acid, dehydroacetic acid, disodium EDTA and
sodium hydroxide; and
water in an amount ranging from 95% to 98% by weight of the
shampoo composition.
2. The composition as claimed in claim 1, wherein the composition is devoid of an alcoholic solvent.
3. The composition as claimed in claim 1, wherein the humectant comprises any or a combination of: propylene glycol, glycerine, plant oils, lactic acid and panthenol.
4. The composition as claimed in claim 1, wherein the preservative comprises any or a combination of: DMDM-hydantoin, sodium benzoate, dehydroacetic acid, benzoic acid, sorbic acid, benzyl alcohol and phenoxyethanol or analogue thereof.
5. The composition as claimed in claim 1, wherein the composition further comprises a fragrance.
6. The composition as claimed in claim 1, wherein the composition comprises, by weight of the composition:

Propylene glycol - 1.5%;
TEA-Lauryl Sulfate - 2.5%;
cocamidopropyl betaine - 1.1%;
benzyl alcohol - 1.0%;
dehydroacetic acid - 0.05%;
parfum - 0.02%;
benzoic acid - 0.05%;
disodium EDTA - 0.05%;
sorbic acid - 0.05%;
NaOH- 0.025%
tocopherol - 0.005%; and
water in a quantity sufficient to make 100%).