定义
Polyurethane-25 is a complex polymer formed by the reaction of dihydroxypolyoxobutylene (degree of polymerization 12-30), dimethylol propionic acid, meta-tetramethylenexylenediisocyanate, isophoronediisocyanate and trimethoylpropane. The prepolymer is neutralized with triethylamine and chain extended with C1-8 alkyl diamine
化妆品中的作用
使粉体黏合成形BINDING保持肌肤良好状态（CosIng 泛分类）SKIN CONDITIONING烫卷或拉直头发HAIR WAVING OR STRAIGHTENING
安全与法规参考
Reviewed by CIR: Final Report: Safety Assessment of Polyurethanes as Used as Cosmetics
来源: 美国CIR 安全性评估