| abstract |
PROBLEM TO BE SOLVED: To provide a wax-containing stable O / W emulsion which does not need to contain an emulsifying surfactant usually used in an O / W emulsion and is therefore tolerated by all types of skin. SOLUTION: (a) 80 to 99 mol% of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) units of the following formula (I): Embedded image Wherein X + is a proton, alkali metal cation, alkaline earth metal cation, ammonium ion, or organic cation; and (b) 1 to 20 mol% of units of the following formula (II): Embedded image Wherein n and p each independently represent an integer in the range from 0 to 24, provided that n + p is less than 25; and R 1 is a hydrogen atom or a straight or branched chain containing 1 to 6 carbon atoms. At least one non-crosslinked amphiphilic polymer is used, wherein R 2 represents a linear or branched alkyl group containing from 6 to 30 carbon atoms. [Selection diagram] None |