Cosmetic composition containing amino acid copolymers which is useful as a moisturizer
AssigneeSanofi
InventorsAlain Barbier, Joseph Millan, Michel Sabadie
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Abstract
The invention relates to the cosmetic use of an amino acid copolymer of the statistical formula ##STR1## in which: a and b are each independently 1 or 2; A and B are similar or different and are an amino acid selected from: arginine, serine, proline, glycine, histidine, alanine, lysine, ornithine, citrulline, urocanic acid, asparagine or tyrosine; m, n, p and q are integers such that the ratio (n+q)/(m+p) is between 0.5 and 4; and z is an integer such that the average molecular weight is between 1000 and 100,000; and/or one of its salts. Application: cosmetic products.
Claims10
A method of moisturizing skin, comprising the step of applying to skin an effective moisturizing amount of an amino acid copolymer of the statistical formula ##STR3## in which:
- a and b are each independently 1 or 2;
- A and B are similar or different and each is an amino acid selected from the group consisting of arginine, serine, proline, glycine, histidine, alanine, lysine, ornithine, citrulline, urocanic acid, asparagine and tyrosine;
- m, n, p and q are integers such that the ratio (n+q)/(m+p) is between 0.5 and 4;
- and
- z is an integer such that the average molecular weight is between 1000 and 100,000;
- or a slat thereof.
A cosmetic composition which contains from 0.1 to 10% by weight of an amino acid copolymer or a mixture of 2 copolymers of the statistical formula ##STR4## in which:
- a and b are each independently 1 or 2;
- A and B are similar or different and are in amino acid selected from the group consisting of arginine, serine, proline, glycine, histidine, alanine, lysine, ornithine, citrulline, urocanic acid, asparagine and tyrosine;
- m, n, p and q are integers such that the ratio (n+q)/(m+p) is between 0.5 and 4;
- and
- z is an integer such that the average molecular weight is between 1000 and 100,000;
- or a salt thereof, and a pharmaceutically acceptable cosmetic excipient.
Dependencies are inferred from the claim text.