CROSSLINKED SILSESQUIOXANE RANDOM COPOLYMERS ABSORBING BOTH UVA AND UVB AND METHOD FOR PREPARING THE SAME
申请人:NANO AND MICRO TECHNOLOGIES CO., LTD.
公开号:US20190202994A1
公开(公告)日:2019-07-04
The present invention relates to crosslinked silsesquioxane random copolymers absorbing both UVA and UVB although they contain only UVB absorbing chromophores, and methods preparing the same. Crosslinked polysilsesquioxane random copolymers prepared by the method of the present invention have good sensory and are safe as they are not absorbed into human body due to their high molecular weights. These polymers have desirable UV blocking function as they absorb wider range of UV including both UV B (280-320 nm) and UV A (320-400 nm) by excimer or exciplex formation between chromophores. Also, these polymers are useful for UV blocking cosmetics as they do not develop opaque white appearance in high concentration (30%).
本发明涉及交联的聚硅氧烷随机共聚物,尽管它们仅含有UVB吸收色团,但能吸收UVA和UVB,以及其制备方法。通过本发明方法制备的交联聚硅氧烷随机共聚物具有良好的感官性能,由于其分子量高,因此安全,不会被人体吸收。这些聚合物具有理想的UV阻挡功能,因为它们通过色团之间的激基或激复合物形成吸收更广泛的UV范围,包括UV B(280-320 nm)和UV A(320-400 nm)。此外,这些聚合物在高浓度(30%)下不会产生不透明的白色外观,因此可用于UV阻挡化妆品。