申请人:GALAXY SURFACTANTS LTD
公开号:US11332564B2
公开(公告)日:2022-05-17
Eco-friendly aqueous synthesis of substantive, UV-absorbing, cationic polymers with ‘inverse temperature dependent solubility’ are described in the present invention. These polymers are water-soluble at ambient temperature and water-resistant at temperature of human body as well as in the presence of electrolytes. This property makes these polymers useful for personal care products that are designed for protecting skin and hair from damages of UV radiation.
The invention relates to aqueous synthesis of polymers of Formula I wherein, ArCO is an UV absorbing moiety selected from 2-cyano-3,3-diphenyl acryloyl, and p-methoxy cinnamoyl, R1 is selected from H and C1-C3 alkyl group, and R2 is selected from C1-C3 alkyl group, m and n are integers and a ratio of m to n is 40:5 to 40:1.
本发明描述了用水溶液合成具有 "反温度溶解度 "的实质性、紫外线吸收性、阳离子聚合物的生态友好型方法。这些聚合物在环境温度下可溶于水,在人体温度和电解质存在下具有防水性。这种特性使这些聚合物可用于保护皮肤和头发免受紫外线辐射伤害的个人护理产品。
本发明涉及式 I 聚合物的水性合成,其中,ArCO 是选自 2-氰基-3,3-二苯基丙烯酰基和对甲氧基肉桂酰基的紫外线吸收分子,R1 选自 H 和 C1-C3 烷基,R2 选自 C1-C3 烷基,m 和 n 是整数,m 与 n 的比例为 40:5 至 40:1。