| abstract |
A novel elastic cationic polyurethane and its use in cosmetic compositions. The present invention relates to a novel cationic polyurethane having elasticity and a cosmetic composition comprising the polymer, the polyurethane having an instantaneous recovery of 5% to 95%, including the following essential: (a1) A) a cationic unit derived from at least one tertiary amine having a functional group reactive to at least two labile hydrogens, the amine being at least partially neutralized, (a2) measured with a differential scanning calorimeter A nonionic unit derived from a nonionic polymer having a functional group reactive to a labile hydrogen at the terminal, having a glass transition temperature (Tg) lower than 10 ° C., and optionally (a3) at least two labile hydrogens. A nonionic unit derived from a nonionic monomer containing a reactive functional group, and (b) a unit derived from at least one diisocyanate. [Selection figure] None |