Cosmetic compositions comprising at least one polysiloxane based polyamide
AssigneeL'oreal
InventorsShaoxiang Lu, Wei Yu, Xavier Blin
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Abstract
The invention relates to a physiologically acceptable composition, especially a cosmetic composition, comprising at least one volatile solvent and a liquid fatty phase comprising at least one structuring polymer, said structuring polymer (homopolymer or copolymer) having an average molecular weight of from 500 to 500,000 and comprising at least one moiety which comprises: at least one polyorganosiloxane group consisting of 1 to 1000 organosiloxane units in the chain of the moiety or in the form of graft and at least two groups capable of establishing hydrogen interactions, the polymer being solid at room temperature and soluble in the liquid fatty phase at a temperature of from 25 to 250° C.
Claims25
A transfer-resistant cosmetic composition comprising a siloxane based polyamide is a polymer comprising multiples of a unit represented by the following formula (A):
- where:
- (a) DP is between 1 and 700;
- (b) n is a number selected from the group consisting of 1-500;
- (c) X is a linear or branched chain alkylene having 1-30 carbons;
- (d) Y is selected from the group consisting of linear or branched chain alkylenes having 1-40 carbons;
- (d) R1, R2, R3 and R4 are the same or different and may be selected from the group consisting of methyl, ethyl, propyl, isopropyl, a siloxane chain, and phenyl a volatile silicone oil is selected from the group consisting of octyltrimethicone, hexyltrimethicone, decamethylcylcopentasiloxane D5, octamethyl cyclotetrasiloxane D4, dodecamethyl cyclohexasiloxane D6, heptamethyl octyltrisiloxane, decamethyl tetrasiloxane, dodecamethyl pentasiloxane, polydimethylsiloxane at 1.5 centistokes (cSt), polydimethylsiloxane at 2 centistokes, polydimethylsiloxane at 3 centistokes, polydimethylsiloxane at 5 centistokes and their mixtures;
- and at least one non-silicone volatile oil, wherein said composition is not a deodorant or antiperspirant stick.
A method of structuring a liquid fatty phase in the presence of a non-silicone volatile oil, comprising adding a siloxane based polyamide to the liquid fatty phase, wherein the siloxane based polyamide is a polymer comprising multiples of a unit represented by the following formula (A):
- where:
- (a) DP is between 1 and 700;
- (b) n is a number selected from the group consisting of 1-500;
- (c) X is a linear or branched chain alkylene having 1-30 carbons;
- (d) Y is selected from the group consisting of linear or branched chain alkylenes having 1-40 carbons;
- (d) R1, R2, R3 and R4 are the same or different and may be selected from the group consisting of methyl, ethyl, propyl, isopropyl, a siloxane chain, and phenyl, and wherein the liquid fatty phase comprises a volatile silicone oil is selected from the group consisting of octyltrimethicone, hexyltrimethicone, decamethylcylcopentasiloxane D5, octamethyl dyclotetrasiloxane D4, dodecamethyl cyclohexasiloxane D6, heptamethyl octyltrisiloxane, decamethyl tetrasiloxane, dodecamethyl pentasiloxane, polydimethylsiloxane at 1.5 centistokes (cSt), polydimethylsiloxane at 2 centistokes, polydimethylsiloxane at 3 centistokes, polydimethylsiloxane at 5 centistokes and their mixtures.
Dependencies are inferred from the claim text.