申请人:GALAXY SURFACTANTS LTD
公开号:US20210301052A1
公开(公告)日:2021-09-30
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, R
1
is selected from H and C
1
-C
3
alkyl group, and R
2
is selected from C
1
-C
3
alkyl group, m and n are integers and a ratio of m to n is 40:5 to 40:1.
本发明描述了一种环保的水相合成方法,用于合成具有“逆温度依赖溶解性”的具有紫外吸收性质的阳离子聚合物。这些聚合物在常温下可溶于水,在人体温度以及存在电解质的情况下具有耐水性。这种特性使得这些聚合物适用于个人护理产品,用于保护皮肤和头发免受紫外线辐射的损害。该发明涉及公式I的聚合物的水相合成,其中ArCO是从2-氰基-3,3-二苯基丙烯酰基和对甲氧基肉桂酰基中选择的紫外吸收基团,R1选自H和C1-C3烷基基团,R2选自C1-C3烷基基团,m和n为整数,m与n的比例为40:5至40:1。