The invention concerns novel anionic polyurethanes with elastic property, that is having an instantaneous elastic recovery ranging between 5% and 100% consisting essentially (a1) of anionic units derived from at least a monomer or polymer compound with sulphonic and/or phosphonic acid function and having at least two functions reactive to labile hydrogen, optionally (a2) non-ionic units derived from at least a non-ionic monomer or polymer compound having at least two functions reactive to labile hydrogen, and (b) units derived from at least a diisocyanate, provided that at least one type of the units (a1) and (a2) is derived from a polymer having a glass transition temperature (Tg) measured by differential enthalpy analysis, less than 10° C. and that said sequences with Tg less than 10° C. represent 20 to 90% of the total weight of the polyurethane. The invention also concerns cosmetic compositions containing the novel anionic polyurethanes with elastic property.
本发明涉及一种新型的带有弹性属性的阴离子聚
氨酯,其瞬时弹性恢复率在5%至100%之间,基本上由以下组分(a1)组成:由至少一种具有
磺酸和/或
膦酸功能的单体或聚合物化合物衍生的阴离子单元,具有至少两种对活性氢反应的功能,可选地(a2)由至少一种非离子单体或聚合物化合物衍生的非离子单元,具有至少两种对活性氢反应的功能,以及(b)由至少一种二
异氰酸酯衍生的单元,但至少一种类型的(a1)和(a2)单元来自具有由差分焓分析测量的
玻璃转移温度(Tg)小于10°C的聚合物,且具有Tg小于10°C的序列占聚
氨酯的总重量的20%至90%。本发明还涉及含有新型带有弹性属性的阴离子聚
氨酯的化妆品组合物。