Substantive UV-absorbing, water-soluble, cationic polymers containing cinnamidoalkylamines and benzamidoalkylainines, with ‘inverse temperature dependant solubility’ are described in the present invention. They are water-soluble at ambient conditions and yet they are water-resistant at the temperature of human body as well as in the presence of electrolytes. These properties make these macromolecules useful for personal care as well as fabric care products.
The present invention also describes the hair, skin and fabric care compositions containing the said polymers of Formula I wherein, ArCO is an UV-absorbing moiety of an organic sunscreen acid or mixtures of organic sunscreen acids selected from p-methoxy cinnamic acid and p-dimethyl amino benzoic acid; R
2
and R
3
are selected from hydrogen, alkyl and cycloalkyl group containing from 1 to 6 carbon atoms; m is an integer from 5 to 9 and n is an integer between 1 to 5 and m+n=10.
1
本发明描述了含有肉桂基烷基胺和苯甲酰胺基烷基胺的具有 "反温度溶解度 "的实质性紫外线吸收、
水溶性阳离子聚合物。它们在环境条件下可溶于
水,但在人体温度和电解质存在下却具有防
水性。这些特性使这些大分子可用于个人护理和织物护理产品。
本发明还描述了含有上述式 I 聚合物的头发、皮肤和织物护理组合物,其中,ArCO 是选自对甲氧基
肉桂酸和对二甲基
氨基
苯甲酸的有机防晒酸或有机防晒酸混合物的紫外线吸收分子;R
2
和 R
3
选自氢、含 1 至 6 个碳原子的烷基和环烷基;m 是 5 至 9 之间的整数,n 是 1 至 5 之间的整数,m+n=10。
1