| abstract |
The invention concerns novel cationic polyurethanes with elastic character, that is having immediate recovery ranging between 5% and 95%, consisting essentially (a1) of cationic units derived from at leat a tertiary amine having at least two functions reactive to labile hydrogen, said tertiary amine being at least partly neutralised, (a2) non-ionic units derived from non-ionic polymer s bearing at their ends functions reactive to labile hydrogen and having a glass transition temperature (Tg), measured by differential heat content analysis, less than 10° C., optionally (a3) non-ionic units derived from non-ionic monomer compounds containing at least two functions reactive to labile hydrogen, and (b) units derived from at least a diisocyanate, and cosmetic compositions containing said polymers. |