Shampoo Compositions with Increased Deposition of Polyacrylate Microcapsules

• US 20120276210A1
• Filed: 04/04/2012
• Published: 11/01/2012
• Est. Priority Date: 04/07/2011
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: DIHORA, Jiten Odhavji, Brown, Mark Anthony
• Granted Patent: US 8,927,026 B2
• Time in Patent Office: Days
• US Class Current: 424/497
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 2800/56 Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61K 8/737 Galactomannans, e.g. guar; Derivatives thereof
• CPC Class Codes: A61K 8/8158 Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/817 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
• CPC Class Codes: A61P 17/00 Drugs for dermatological disorders
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair

Abstract

A shampoo composition that increases the deposition and retention of benefit agent containing polyacrylate microcapsules onto hair during the cleansing process. The shampoo composition is based on the combination of anionic charged polyacrylate microcapsules, cationic deposition polymers, detersive surfactant, and a carrier.

Claims

1. A shampoo composition comprising:

(a) from about 0.001% to about 10% of an anionic charged polyacrylate microcapsule;

(b) from about 0.01% to about 2% of a cationic deposition polymer; and

(c) from about 2% to about 25% of a detersive surfactant; and

(d) a carrier.

2. The shampoo composition of claim 1, wherein the anionic charged polyacrylate microcapsule comprises an anionic emulsifier and a polyacrylate microcapsule.

3. The shampoo composition of claim 2, wherein the anionic emulsifier surrounds at least a part of the external surface of the polyacrylate microcapsule, or is physically or chemically bound to the external surface of the polyacrylate microcapsule.

4. The shampoo composition of claim 2, wherein the anionic emulsifier and the polyacrylate microcapsule are mixed such that the weight ratio of the anionic emulsifier to the polyacrylate microcapsule is from about 1.0:

40 to about 0.5;

5.

5. The shampoo composition of claim 1, wherein the anionic charged polyacrylate microcapsule and the cationic deposition polymer are mixed such that the weight ratio of the anionic charged polyacrylate microcapsule to the cationic deposition polymer is from about 1.0:

0.01 to about 1.0;

10.

6. The shampoo composition of claim 2, wherein the anionic emulsifier is selected from the group consisting of:

Poly(meth)acrylic acid;

copolymers of (meth)acrylic acids and its (meth)acrylates with C1-C22 alkyl;

copolymers of (meth)acrylic acids and (meth)acrylamide; and

mixtures thereof.

7. The shampoo composition of claim 1, wherein the anionic charged polyacrylate microcapsule has a particle size of from about 2 microns to about 80 microns.

8. The shampoo composition of claim 2, wherein the polyacrylate microcapsule has a core and a shell that encapsulates said core.

9. The shampoo composition of claim 8, wherein the core comprises from about 6% to about 99.9% of a benefit agent.

10. The shampoo composition of claim 9, wherein the benefit agent is selected from the group consisting of perfumes;

brighteners;

enzymes;

sensates;

attractants;

dyes;

pigments;

bleaches;

anti-dandruff agents; and

mixtures thereof.

11. The shampoo composition of claim 10, wherein the anti-dandruff agent is ZPT.

12. The shampoo composition of claim 1, wherein the cationic deposition polymer is selected from the group consisting of starches, guar, cellulose, cassia, locust bean, Konjac, Tara, galactomanna, polyDADMAC, Jaguar C17, Tapioca starch, and polyTriquat.

13. The shampoo composition of claim 1, wherein the cationic deposition polymer is a water-soluble polymer with a charge density of from about 0.5 milliequivalents per gram to about 12 milliequivalents per gram, and wherein the cationic deposition polymer has a molecular weight of about 100,000 Daltons to about 5,000,000 Daltons.

14. The shampoo composition of claim 1, wherein the detersive surfactant is anionic, zwitterionic, amphoteric, and combinations thereof.

15. The shampoo composition of claim 1, wherein the carrier comprises water and water solutions of lower alkyl alcohols and polyhydric alcohols.

16. The shampoo composition of claim 1, wherein the anionic charged polyacrylate microcapsule is contained in an agglomerate, and wherein the agglomerate comprises materials selected from the group consisting of silicas, citric acid, sodium carbonate, sodium sulfate, sodium chloride, and binders such as sodium silicates, modified celluloses, polyethylene glycols, polyacrylates, polyacrylic acids, zeolites and mixtures thereof.

17. The shampoo composition of claim 1, wherein the shampoo composition is in the form of a gel, and wherein the gel comprises less than about 45% water.

18. The shampoo composition of claim 17, wherein the gel has a neat viscosity of about 1,000 cps to about 10,000 cps.

19. A method of making a shampoo composition, said method comprising:

a) coating a polyacrylate microcapsule with an anionic emulsifier to form an anionic polyacrylate microcapsule;

b) combining the anionic polyacrylate microcapsule with a cationic deposition polymer to form a premix;

c) adding the premix to a detersive composition comprising surfactant and a carrier.

20. A method of making a shampoo composition, said method comprising:

a) coating a polyacrylate microcapsule with an anionic emulsifier to form an anionic polyacrylate microcapsule;

b) combining the anionic polyacrylate microcapsule with a cationic deposition polymer to form a premix;

c) adding the premix to a anionic surfactant;

d) adding the resulting mixture of step (c) to a detersive composition comprising surfactant and a carrier.

21. The method of making a shampoo composition of claim 20, wherein the anionic surfactant is selected from the group consisting of alkyl and alkyl ester sulfates, and the water soluble salts of organic, and sulfuric acid reaction products.