FIELD OF THE INVENTION

The present invention relates to a cosmetic composition selected from shampoos, conditioners adapted as conditioning enhancers for keratinic fibres, which when applied on keratinic fibres including hair imparts improved conditioning. Advantageously, the invention is directed to such conditioning compositions adapted to deliver superior conditioning benefits, compatibility, softness and shine to the hair.

BACKGROUND ART

The use of silicones in hair shampoo compositions for improving conditioning is very well known. Generally the silicones are dispersed /suspended in the composition which is then applied to the hair to deposit silicones. The prior art literature suggests that steps have to be taken to prevent creaming of the emulsified droplets of the silicones present in the composition during storage. To prevent such a situation, in the prior art, certain materials such as certain gums and/ or crystalline materials like ethylene glycol distearate are incorporated in the composition. The use of such materials renders the resulting composition cloudy or opaque. Another disadvantage is that such materials lead to dulling of the hair as well as lowering of other conditioning attributes of the composition.

Prior art also teaches incorporating silicones as micro-emulsion. In such a process high viscosity emulsion is used. It is known that such a composition does not give sufficient conditioning benefit for people.To overcome this problem it has been suggested to use microemulsions of silicone wherein the silicone is very slightly cross linked in the emulsion form and in addition, use of specific type of cationic guar gum derivative has also been recommended.

EP1759690 is found to disclose a cosmetic composition comprising (a) at least one block copolymer having at least one hard segment and at least one soft segment; (b) at least one tackifier component; (c) at least one phenylated silicone; (d) at least one solvent; and (e) optionally at least one colorant, adapted for a makeup product for lips and also for treating a keratinous substrate.

Phenyl functionalized silicones used in this prior cosmetic composition has an inherent property of reducing the viscosity of the shampoo composition and also have tendency to separate out and hence it is difficult to incorporate the phenylfunctionalised silicones in a cosmetic composition and yet attain a stable composition having the provision of desired conditioning benefits involving simple ingredients including non-volatile silicones, surfactants and cationic polymers.

However, the conditioning delivered involving such available formulations are not always acceptable to the consumers as the conditioning performance may be insufficient for many people who desire high level of conditioning.

Therefore it is clearly apparent that in spite of the presence of such wide varieties of cosmetic compositions, there still remains a continuing need in the art to provide for new, improved compositions for the purpose of imparting superior benefits to hair by enhancing the conditioning performance of composition containing silicones to deliver higher levels of conditioning such as improved shine and softness alongwith superior combability.

OBJECTS OF THE INVENTION

It is therefore a primary object of the present invention to provide for cosmetic compositions selected from shampoos, conditioners that would be adapted to deliver superior conditioning benefits to keratinic fibres by suitably enhancing the conditioning performance of surfactants in said compositions.

Another object of the present invention is to provide for the said cosmetic composition preferably shampoo compositions adapted to deliver superior conditioning benefits, compatibility, softness and shine to the hair.

Yet another object of the present invention is directed to provide for shampoo compositions with superior conditioning benefits to the hair.

SUMMARY OF THE INVENTION

Thus according to the basic aspect of the present invention there is provided a cosmetic composition with improved conditioning attributes comprising ingredients in addition to water (i) non-volatile silicones involving pre-emulsified particles of non-functionalized silicone and (ii) non-volatile silicones involving pre-emulsified particles of phenyl functionalized silicone; (iii) at least one cationic polymer; and (iv) atleast one surfactant selected from anionic, nonionic, zwitterionic or amphoteric surfactants or mixtures thereof.

According to a preferred aspect of the present invention there is provided said cosmetic composition wherein said non-volatile silicones involving pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone are present in the range of 1:3 to 3:1.

According to yet another preferred aspect of the present invention there is provided said cosmetic composition wherein the percentage of phenyl functionality in the functionalized silicone in the range of 0.05 to 0.5.

It is thus a special finding of the present invention that when non-volatile silicones of a cosmetic composition comprising pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone are present in the range of 1:3 to 3:1 with the percentage of phenyl functionality in the functionalized silicone being in the range of 0.05 to 0.5, resulted in the significant synergistic improvement in the conditioning attributes of the composition by the selective combination of some simple ingredients.

Importantly it is thus selectively found that non-volatile silicones comprising pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone present in the range of 1:3 to 3:1 having the percentage of phenyl functionality in the functionalized silicone in the range of 0.05 to 0.5 when present together with cationic polymer, a surfactant selected from anionic, amphoteric and non-ionic surfactants and/or mixtures thereof in a cosmetic composition is found to synergize together to thus enhance the conditioning performance of said composition that is also found to be stable to provide for the desired beneficial attributes.

Hence by employing selective amounts of pre-emulsified particles of phenyl functionalized silicones and pre-emulsified particles of non-functionalized silicone, wherein the phenyl functionality of said functionalized silicone is also within a selective range, together with cationic polymer, a surfactant selected from anionic, amphoteric and non-ionic surfactants and/or mixtures thereof a stable cosmetic composition could still be achieved with improved conditioning attributes vis-a-vis the known inherent properties of said phenyl functionalized silicones known to reduce the viscosity of the shampoo composition with a known tendency to separate out to result to thereby result in an unstable composition.

Thus by employing selective amounts of said simple ingredients together with selective amounts of phenyl functionalized silicone, a cosmetic composition could still be achieved with improved conditioning attributes irrespective of the presence of said phenyl functionalized silicone with its inherent known disadvantages that it extends in formulations involving it. Hence the selective amounts of said selective ingredients in said composition aid to modulate the inherent characteristics of phenyl functionalized silicone to impart the desired stability and improved conditioning attributes to the compositions involving it.

According to another preferred aspect of the present invention there is provided said cosmetic composition wherein said non-volatile silicones involving pre-emulsified particles of non-functionalized silicone can be selected from non-functionalized silicone with a viscosity of atleast 60,000 est at 25Deg C, classified in PCPC as Dimethicone, Dimethiconol and the like.

According to yet another preferred aspect of the present invention there is provided said cosmetic composition wherein the said ingredient involving functionalized silicone has a viscosity of 30,000 est at 25Deg C, and having the percentage of phenyl functionality in the functionalized silicone in the range of 0.05 to 0.5.

According to another preferred aspect of the present invention there is provided a cosmetic composition wherein said non-volatile silicones involving pre-emulsified particles of said silicones having particle size of atleast 150 nm and viscosity of atleast 30,000 cps at 25Deg C.

According to yet another preferred aspect of the present invention there is provided said cosmetic composition wherein said ingredient (i) involving non-functionalized silicones are selected from polydimethyl siloxanes such as Dimethicone, Dimethiconol and functionalized silicones are selected from phenyl functionalized silicone where in the percentage of phenyl functionality is in the range of 0.05 to 0.5.

The silicones can also be selected from functionalized silicone with a viscosity of atleast 30,000 est classified as phenyl functionalized silicone.

According to another aspect of the present invention there is provided said process for manufacturing said cosmetic composition comprising the steps of

(i) adding at least one or more surfactants selected from anionic, amphoteric / zwitter- ionic and non-ionic surfactants or the mixtures thereof in deionized water and mixing well till a homogenous solution is obtained

(ii) adding the pre-emulsifeid particles of non-functionalised silicone and pre-emulsified particles of phenyl functionalized silicone to the solution obtained in step (i) and mixing the resulting mixture thoroughly until a homogenous solution is obtained

(iii) dispersing the cationic depositing polymers followed by adding deionized water equal to or greater than 10 times the quantity of cationic polymer and mixing them using a stirrer until the cationic polymer is dispersed

(iv)adding the dispersed cationic depositing polymer solution obtained in step (iii) to the composition obtained in step (ii)

(v) if desired, adding benefit agents which are normally used in such a composition known in the art, to the composition with moderate agitation to prevent heavy aeration until the composition is uniform .

According to another preferred aspect of the present invention there is provided said process for manufacturing the cosmetic composition wherein said step (a) of providing (i) non-volatile silicones involving pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone is in the range of 1:3 to 3:1.

According to yet another preferred aspect of the present invention there is provided said process for manufacturing the cosmetic composition wherein said step (a) of providing (i) non-volatile silicones comprises providing the functionalized silicones wherein the percentage of phenyl functionality in the functionalized silicone is in the range of 0.05 to 0.5.

The present invention is explained hereunder in greater details in relation to the non-limiting exemplary illustrations.

DETAILED DESCRIPTION OF THE INVENTION

As discussed hereinbefore the present invention thus provides for cosmetic compositions selected from shampoos, conditioners with improved conditioning attributes comprising ingredients in addition to water (i) non-volatile silicones involving pre-emulsified particles of non-functionalized silicone (ii) non-volatile silicones involving pre-emulsified particles of phenyl functionalized silicone (iii) at least one cationic polymer and (iv) atleast one surfactant selected from anionic, nonionic, zwitterionic or amphoteric surfactants or mixtures thereof.

It is selectively found by way of the present invention that when pre-emulsified particles non-functionalized silicone and that of phenyl functionalized silicone are present in the range of 1:3 to 3:1 in the said composition and in preferably having the percentage of phenyl functionality of the phenyl functionalized silicone in the range of 0.05 to 0.5, when present together with cationic polymer, a surfactant selected from anionic, amphoteric and non-ionic surfactants and/or mixtures thereof in a cosmetic composition synergistically boosts the conditioning attributes of said composition.

Preferably said cationic polymers are selected from copolymers of vinylmonomers having cationic amine or quaternary ammonium functionalities with water soluble spacer monomers such as (meth) acylamide, alkyl and dialkyl (meth) acrylamides, Alkyl (meth) acrylate, vinyl caprolactone and vinyl pyrrolidone wherein said alkyl and dialkyl substituted monomers preferably have C1-C7 alkyl groups, more preferably Cl-3 alkyl groups wherein suitable spacers include vinyl esters, vinyl alcohol, maleic anhydride, propylene glycol and ethylene glycol, Polyquatemium-10, Polyquaternium-7, Polyquaternium-6, Polyquaternium-16, Polyquaternium-11 and terpolymers of acrylic acid with dimethyldiallylammonium chloride and acrylamide (referred to in the industry by PCPC as Polyquaternium 39), and terpolymers of acrylic acid with methacrylamidopropyl trimethylammonium chloride and methyl acrylate (referred to in the industry by PCPC as Polyquaternium 47); and are also preferably selected from a class of cationic polymers formed from methacrylamidopropyl trimonium chloride and/or acrylamidopropyl trimonium chloride and copolymers of these monomers with acrylamide

(Specific examples of these materials include polymethyacrylamidopropyl trimonium chloride, available under the trade name Polycare 133, from Rhone-Poulenc, and acrylamidopyltrimonium chloride/acrylamide copolymer which is available under the trade name of Salcare SC60 from Ciba); and are also preferably selected from the class of Hydrophobically modified hydroxyethyl cellulose (Example of these material is Softcat SL polymer series from Amerchol); or are selected from the class of cationic polysaccharides including cationic guar gum derivative, especially guar hydroxypropyltrimethylammonium chloride.

Preferably said cationic polysaccharides include cationic cellulose derivatives such as those salts of hydroxyethyl cellulose reacted with trimethyl amnxinium substituted epoxide, referred to in the industry as Polyquaternium 10. Specific examples of these materials include those polymers available from Amerchol Corporation in their Polymer JR series of polymers, such as Polymer JR125, Polymer JR400 and Polymer JR30M. Other suitable types of cationic cellulose include the polymeric quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethyl ammonium-substituted epoxide referred to in the industry (PCPC) as Polyquaternium 24.

Yet another preferred class of cationic polysaccharide include cationic guar gum derivative, especially guar hydroxypropyltrimethylammonium chloride. Specific examples of these materials include those polymers available from Rhodia in their JAGUAR series of polymers, such as JAGUAR C13S and JAGUAR CI7.

The present invention thus provides for simple ingredient based cosmetic compositions wherein said simple ingredients in selective amounts together with pre-emulsified particles of non-functionalized silicones and phenyl functionalized silicones boosts the conditioning performance of said cosmetic composition also involving surfactants, which said conditioning performance gets improved significantly to thereby delivering superior conditioning benefits.

Examples 1, 2 and 5 below illustrate a composition not in accordance with the present invention whereas examples 3 and 4 illustrate the compositions in accordance with the present invention

Examples

Performance evaluation of Formulations under Example 3 and Example 4 against Example 1 and Example 2 illustrated above:

Performance and comparisons of the composition of the present invention illustrated in Example 3 and Example 4 against composition of example 1 and Example 2 was done using paired comparison salon tests for foam, cleansing, softness of washed hair while wet, softness of hair after drying, ease of combing of dried hair and making hair manageable. The evaluations were performed by a trained, licensed cosmetologist.

Following use of the compositions, the consumers were asked to assess their hair for the above said attributes. The findings are illustrated hereunder:

Composition illustrated in Example 3 and Example 4 were assessed against Example 1 and Example 2 by a panel of volunteers in salon by half head method which is known to the person skilled in the art. Following use, the consumers were asked to assess on their own hair on foam, cleansing, softness of washed hair while wet, Softness of hair after drying, ease of combing of dried hair and making hair manageable. Composition illustrated in Example 3 and Example 4, were rated significantly better in terms of softness of washed hair while wet, softness of hair after drying, ease of detangling and combing of dried hair and making hair manageable and shine compared to the composition described in Example 1 and 2.

Performance evaluation of Formulations under Example 5 against Example 3 illustrated above:

Performance comparisons of the composition illustrated in Example 5 against composition of invention illustrated in example 3 was done using paired comparison salon tests for foam, cleansing, softness of washed hair while wet, softness of hair after drying, ease of combing of dried hair and making hair manageable. The evaluations were performed by a trained, licensed cosmetologist.

Following use of the compositions, the consumers were asked to assess their hair for the above said attributes. The findings are illustrated hereunder:

Performance comparisons of the composition illustrated in Example 5 against composition of invention illustrated in example 3 by a panel of volunteers in salon by half head method which is known to the person skilled in the art. Following use, the consumers were asked to assess on their own hair on foam, cleansing, softness of washed hair while wet, Softness of hair after drying, ease of combing of dried hair and making hair manageable. Composition illustrated in Example 3 were rated significantly better in terms of softness of washed hair while wet, softness of hair after drying, ease of detangling and combing of dried hair and making hair manageable and shine compared to the composition described in Example 5.

As is clearly evident from the data in the Tables above that the selective combination of simple ingredients thus provides for a cost effective cosmetic composition wherein said simple ingredients when present in selective amounts together with pre-emulsified particles of non-functionalized silicones and phenyl functionalized silicones boosts the conditioning performance of said cosmetic composition also involving surfactants, which said conditioning performance gets improved significantly to thereby delivering superior conditioning benefits. It is thus possible by way of the advancement made in the present invention to provide for said cosmetic composition selected from conditioners, shampoos with improved conditioning attributes comprising non-volatile silicones involving pre-emulsified particles of non-functionalized silicone, non-volatile silicones involving pre-emulsified particles of phenyl functionalized silicone together with cationic polymer, a surfactant selected from anionic, amphoteric and non-ionic surfactants and/or mixtures thereof that is found to surprisingly boost the conditioning performance of surfactant based cosmetic compositions unexpectedly enhancing their conditioning performance to thereby deliver superior conditioning benefits, compatibility, softness and shine to the hair.

We Claim:

1. A cosmetic composition with improved conditioning attributes comprising ingredients in addition to water (i) non-volatile silicones involving pre-emulsified particles of non-functionalized silicone (ii) non-volatile silicones involving pre-emulsified particles of phenyl functionalized silicone (iii) at least one cationic polymer and (iv) atleast one surfactant selected from anionic, nonionic, zwitterionic or amphoteric surfactants or mixtures thereof.

2. A cosmetic composition as claimed in claim 1 wherein said non-volatile silicones involving pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone are present in the range of 1:3 to 3:1.

3. A cosmetic composition as claimed in anyone of claims 1 or 2 wherein said ingredient involving non-functionalized silicone are selected from Dimethicone, Dimethiconol and the like with a viscosity of atleast 60,000 est at 25Deg C.

4. A cosmetic composition as claimed in anyone of claims 1 or 2 wherein the said ingredient involving functionalized silicone has a viscosity of 30,000 est at 25Deg C and having the percentage of phenyl functionality in the functionalized silicone in the range of 0.05 to 0.5.

5. A cosmetic composition as claimed in anyone of the preceding claims wherein said non-volatile silicones involving pre-emulsified particles at 25Deg C of said silicones having particle size of atleast 150 nm and viscosity of atleast 30,000 cps

6. A cosmetic composition as claimed in anyone of the preceding claims wherein said cationic polymers are selected from polyquaterniums, cationic cellulosic derivatives and cationic polysaccharides or mixtures thereof.

7. A process for manufacturing the cosmetic composition as claimed in claims 1 to 6 comprising the steps of (i) adding at least one or more surfactants selected from anionic , amphoteric / zwitter-ionic and non-ionic surfactants or the mixtures thereof in deionized water and mixing well till a homogenous solution is obtained

(ii) adding the pre-emulsified particles of non-functionalised silicone and pre-emulsified particles of phenyl functionalized silicone to the solution obtained in step (i) and mixing the resulting mixture thoroughly until a homogenous solution is obtained

(iii) dispersing the cationic depositing polymers followed by adding deionized water equal to or greater than 10 times the quantity of cationic polymer and mixing them using a stirrer until the cationic polymer is dispersed

(iv) adding the dispersed cationic depositing polymer solution obtained in step (iii) to the composition obtained in step (ii)

(v) if desired, adding benefit agents which are normally used in such a composition known in the art, to the composition with moderate agitation to prevent heavy aeration until the composition is uniform.

8. A process for manufacturing the cosmetic composition as claimed in claim 7 wherein said step (a) of providing (i) non-volatile silicones involving pre-emulsified particles of non-functionalized silicone and pre-emulsified particles of phenyl functionalized silicone is in the range of 1:3 to 3:1.

9. A process for manufacturing the cosmetic composition as claimed in anyone of claims 7 or 8 wherein said step (a) of providing (i) non-volatile silicones comprises providing the functionalized silicones wherein the percentage of phenyl functionality of the functionalized silicone is in the range of 0.05 to 0.5.