Cosmetic compositions comprising alk(en)ylsuccinic acid derivatives
The invention relates to cosmetic and pharmaceutical compositions containing a fragrance and at least one emulsifier comprising a) at least one alkyl chain and/or alkenyl chain having at least 28 carbon atoms obtainable by polymerization of (C 2 -C 5 )-alkenes and which is linked with b) at least one carboxylic acid, carboxylic acid derivative, carboxylic anhydride, carboxylic anhydride derivative, ester and/or amide group. Particularly preferred emulsifiers are alkenylsuccinic anhydrides according to formula (1) and derivatives thereof, in which n is equal to or greater than 4.
1 . A cosmetic composition comprising a fragrance and an emulsifier wherein the emulsifier comprises an ester of an alkenylsuccinic anhydride of formula (2):
wherein n is equal to or greater than 4, and R is derived from a mono-functional alcohol selected from the group consisting of an ethoxylated monoalcohol, a propoxylated monoalcohol, a fatty alcohol ethoxylate, methyl glycol and methyltriglycol.
2 . The cosmetic composition of in claim 1 , which is in the form of an emulsion.
3 . The cosmetic composition of in claim 1 which is in the form of a water-in-oil emulsion.
4 . The cosmetic composition of claim 1 , which is in the form selected from the group consisting of an ointment, a cream, a lotion, a gel, and a spray.
5 . The cosmetic composition of claim 1 , wherein the cosmetic composition comprises 0.1 to 8% by weight of the emulsifier.
6 . A cosmetic composition comprising a fragrance and an emulsifier wherein the emulsifier comprises an ester of alkenylsuccinic anhydride of formula (2a):
wherein n is equal or greater than 4,
R a is H or methyl,
a is an integer of from 1 to 10, and
R b is an alkyl group comprising 1 to 22 carbon atoms.
7 . The cosmetic composition of claim 6 , wherein R b is an alkyl group comprising 1 to 12 carbon atoms.
8 . The cosmetic composition of claim 6 , wherein R b is an alkyl group comprising 1 to 4 carbon atoms.
9 . The cosmetic composition of claim 6 , wherein R a is H.
10 . The cosmetic composition of claim 6 , wherein a is an integer of from 1 to 7.
11 . The cosmetic composition of claim 6 , wherein a is 3, R a is H, and R b is methyl.
12 . The cosmetic composition of claim 11 , wherein n is 15.
13 . The cosmetic composition of claim 6 , wherein in a is 7, R a is H and R b is methyl.
14 . The cosmetic composition of claim 13 , wherein n is 15.
15 . A method for treating human skin, said method comprising contacting skin with the cosmetic composition of claim 1 .
16 . A method for treating human skin, said method comprising contacting the human skin with the cosmetic composition of claim 6.