Microbicidal agent and composition for cosmetic treatment containing it
OwnerRainer Mullerinventor
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Abstract
The present invention relates to a microbicidal agent comprising anisic acid, one of its salts or one of its C1-4 alkyl esters, at least one polyol and at least one cationic surfactant. This microbicidal agent makes it possible in particular to prevent the proliferation of bacteria and fungi such as Aspergillus niger, and may be used in cosmetics. The invention also relates to a composition for the cosmetic treatment of keratinous materials, such as a shampoo, containing it.
Claims24
Microbicidal agent comprising anisic acid, one of its salts or one of its C1-4 alkyl esters, at least one polyol and at least one cationic surfactant.
Microbicidal agent according to any one of the preceding claims, characterized in that the cationic surfactant is chosen from:
- those which have the following general formula (I):
- 9
- in which the symbols R1 to R4, which may be identical or different, represent a linear or branched aliphatic group comprising from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl;
- X− is an anion chosen from the set consisting of halides, phosphates, acetates, lactates, (C2-C6)alkyl sulphates, alkyl or alkylaryl sulphonates;
- the quaternary ammonium salts of imidazoline;
- the quaternary diammonium salts of formula (III):
- 10
- in which R9 denotes an aliphatic group comprising about from 16 to 30 carbon atoms, R10, R11, R12, R13 and R14, which are identical or different, each represent a hydrogen atom or an alkyl group comprising from 1 to 4 carbon atoms, and X− is an anion chosen from the set consisting of halides, acetates, phosphates, nitrates and methyl sulphates;
- and.
- the quaternary ammonium salts containing at least one ester functional group.
Microbicidal agent according to any one of the preceding claims, characterized in that the anisic acid, one of its salts or one of its esters is contained in a quantity from 1 to 30% by weight, preferably from 4 to 20% by weight relative to the total weight of the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that the anisic acid, one of its salts or one of its esters is contained in a quantity ranging up to 1% by weight, preferably in a quantity from 0.1 to 0.4% by weight relative to the total weight of a composition containing the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that the polyol is contained in a quantity ranging up to 50% by weight, preferably in a quantity from 10 to 30% by weight relative to the total weight of the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that the polyol is contained in a quantity ranging up to 10% by weight, preferably in a quantity from 5 to 10% by weight relative to the total weight of a composition containing the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that the cationic surfactant is contained in a quantity from 20 to 80% by weight, preferably from 30 to 60% by weight relative to the total weight of the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that the cationic surfactant is contained in a quantity from 0.05 to 10% by weight, preferably from 0.1 to 5% by weight relative to the total weight of a composition containing the microbicidal agent.
Microbicidal agent according to any one of the preceding claims, characterized in that it comprises anisic acid, a pentanediol and quaternium-27.
Microbicidal agent according to any one of the preceding claims, characterized in that it prevents the proliferation of bacteria and fungi such as Aspergillus niger.
Microbicidal agent according to any one of the preceding claims, characterized in that it is used in cosmetics.
Microbicidal agent according to any one of the preceding claims, characterized in that it is used for decontaminating a cosmetic composition.
Composition for the cosmetic treatment of keratinous materials, comprising, in a cosmetically acceptable medium, at least one microbicidal agent according to any one of the preceding claims.
Dependencies are inferred from the claim text.