Patent ID: 8921505
Filing Date: 2014-12-30
Classification: A61K,A61Q,C08G

Abstract:
1. A method for preparing poly(organic oxidized silicon) particles having UV-absorbing groups, comprising reacting an organoalkoxysilane precursor having a UV-absorbing group selected from a group consisting of organotrialkoxysilane, diorganoalkoxysilane and a mixture thereof, in the presence of a base, with a silane compound selected from a group consisting of aryltrialkoxysilane, diaryldialkoxysilane, arylalkyldialkoxysilane and a mixture thereof, serving as a crosslinking regulator and UV stability enhancer, so as to prepare poly(organic oxidized silicon) particles selected from a group consisting of polysilsesquioxane, silsesquioxane-siloxane copolymer, silsesquioxane-silica copolymer, silsesquioxane-siloxane-silica copolymer and silsesquioxane-siloxane copolymer, having UV-absorbing groups.