Oil-in-water skin composition comprising silicone gum and fatty acid ester capable of forming liquid crystals

• US 6,096,325 A
• Filed: 04/22/1997
• Issued: 08/01/2000
• Est. Priority Date: 02/09/1993
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Nawaz, Zahid, Rolls, Richard George A., Courpron, Elise, Date, Robert Francis
• Primary Examiner(s): PAGE, THURMAN K
• Application Number:
  US08/837,855
• Time in Patent Office: 1,197 Days
• Field of Search: 424/70.12, 424/70.19, 424/401, 514/937, 514/938
• US Class Current: 424/401
• CPC Class Codes: A61K 2800/654 The particulate/core comprising macromolecular material
• CPC Class Codes: A61K 8/0275 Containing agglomerated particulates
• CPC Class Codes: A61K 8/0295 Liquid crystals
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/062 Oil-in-water emulsions
• CPC Class Codes: A61K 8/375 the alcohol moiety containing more than one hydroxy group
• CPC Class Codes: A61K 8/4973 with oxygen as the only hetero atom
• CPC Class Codes: A61K 8/60 Sugars; Derivatives thereof
• CPC Class Codes: A61K 8/732 Starch; Amylose; Amylopectin; Derivatives thereof
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin

Abstract

A skin care composition in the form of an oil-in-water dispersion includes, by weight:

a) from about 0.1% to about 20% of a silicone component comprising a silicone gum having a molecular weight of from about 200,000 to about 4,000,000;

b) from about 2% to about 10% of an emulsifier capable of forming liquid crystals in water and comprising sucrose fatty acid ester and sorbitan fatty acid ester; and

c) humectant;

wherein at least a portion of the humectant is in the form of an admixture with a particulate carrier material, the weight ratio of humectant to carrier is from about 1:4 to about 3:1, and the particulate carrier is a cross-linked polymethacrylate copolymer.

Claims

1. A skin care composition in the form of an oil-in-water dispersion comprising, by weight:

a) from about 0.1% to about 20% of a silicone component comprising a silicone gum having a molecular weight of from about 200,000 to about 4,000,000;

b) from about 2% to about 10% of a first emulsifier capable of forming liquid crystals in water and comprising sucrose fatty acid ester and sorbitan fatty acid ester; and

c) an additional emulsifier selected from the group consisting of ethoxylated polyol fatty acid esters and mixtures thereof.

2. A skin care composition according to claim 1 where the emulsifier is a blend of sorbitan stearate and sucrose cocoate.

3. A skin care composition according to claim 1 comprising a primary oil phase which is essentially silicone-free and a secondary oil phase comprising the silicone gum.

4. A skin care composition according to claim 1 comprising from about 3% to about 7% by weight of emulsifier.

5. A skin care composition according to claim 1, wherein the primary oil phase comprises an ingredient selected from the group consisting of mineral oil, vegetable oils, animal oils, vegetable fats, animal fats, vegetable waxes, animal waxes, fatty acid esters other than sorbitan fatty acid esters and sucrose fatty acid esters, fatty alcohols, fatty acids and mixtures thereof.

6. A skin care composition according to claim 1, further comprising from about 0.1% to about 10%, by weight of the composition, of an unsaturated ingredient selected from the group consisting of hydroxy substituted C₈ -C₅₀ unsaturated fatty acids, esters of hydroxy substituted C₈ -C₅₀ unsaturated fatty acids and mixtures thereof.

7. A skin care composition according to claim 6 wherein the optionally hydroxy substituted C₈ -C₅₀ unsaturated fatty acid or ester thereof is cetyl ricinoleate.

8. A skin care composition according to claim 1, further comprising from about 0.1% to about 20%, by weight of a humectant selected from the group consisting of polyglycerylmethacrylate lubricants, butylene glycol, panthenols, propylene glycol, hexylene glycol, hexanetriol, glucose ethers and mixtures thereof.

9. A skin care composition according to claim 8, wherein the humectant is selected from the group consisting of panthenols and mixtures thereof.

10. A skin care composition according to claim 1, further comprising from about 0.01% to about 10%, by weight, of a gelling agent comprising a hydrophobically-modified cross-linked polymer of acrylic acid having amphipathic properties.

11. A skin care composition according to claim 1, wherein the silicone component is present at a level of from about 0.5% to about 15%, by weight of the composition.

12. A skin care composition according to claim 1, wherein the additional emulsifier is selected from the group consisting of ethoxylated fatty acid esters of glycerine, propyleneglycol, ethylene glycol, sorbitol, sorbitan, polypropyleneglycol, glucose, sucrose and mixtures thereof.

13. A skin care composition according to claim 1, further comprising from about 0.1% to about 10% of a polymer selected from the group consisting of colloidaily water-soluble polyalkenyl polyether cross-linked polymers of acrylic acid and mixtures thereof.

14. A skin care composition according to claim 1, further comprising from 0.1% to about 5%, by weight, phenoxyethanol.

17. A skin care composition according to claim 1, further comprising from about 0.1% to about 10% of a polymer selected from the group consisting of colloidally water-soluble polyalkenyl polyether cross-linked polymers of acrylic acid and mixtures thereof.

15. A skin care composition in the form of an oil-in-water dispersion comprising, by weight:

a) from about 0.1% to about 20% of a silicone component comprising a silicone gum having a molecular weight of from about 200,000 to about 4,000,000;

b) from about 2% to about 10% of an emulsifier capable of forming liquid crystals in water and comprising sucrose fatty acid ester and sorbitan fatty acid ester; and

c) humectant;

wherein at least a portion of the humectant is in the form of an admixture with a particulate carrier material which is a crosslinked polymethacrylate copolymer, and wherein the weight ratio of humectant to carrier is from about 1;

4 to about 3;

1.

16. A skin care composition according to claim 15, wherein the humectant is selected from the group consisting of polyglycerylmethacrylate lubricants, butylene glycol, panthenols, propylene glycol, hexylene glycol, hexanetriol, glucose ethers and mixtures thereof.

18. A skin care composition in the form of an oil-in water dispersion comprising, by weight:

a) from about 0.1% to about 20% of a silicone component comprising a silicone gum having a molecular weight of from about 200,000 to about 4,000,000;

b) from about 2% to about 10% of an emulsifier capable of forming liquid crystals in water and comprising sucrose fatty acid ester and sorbitan fatty acid ester; and

c) from about 0.1% to about 10% of an unsaturated compound selected from the group consisting of hydroxy substituted C8-C₅₀ unsaturated fatty acids, esters of hydroxy substituted C₈ -C₅₀ unsaturated fatty acids and mixtures thereof.

19. A skin care composition according to claim 18, wherein the unsaturated compound is selected from the group consisting of ricinoleic acid esters and mixtures thereof.

20. A skin care composition according to claim 18, further comprising from 0.1% to about 5% phenoxyethanol.

21. A skin care composition according to claim 18, further comprising from about 0.001% to about 0.5%, by weight, carboxymethylchitin.