The present invention relates to a method for preparing poly(organic oxidized silicon) particles having UV-absorbing groups, including 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 tetraalkoxysilane, alkyltrialkoxysilane, tetraalkoxysilane, aryltrialkoxysilane, dialkyldialkoxysilane, 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. The poly(organic oxidized silicon) particles significantly solves the problem of poor UV stability, while maintaining UV absorption by the UV-absorbing group contained in the particles. Since the poly(organic oxidized silicon) particles having UV-absorbing groups do not exhibit white turbidity, they can be effectively used in cosmetics. In accordance with the present invention, the poly(organic oxidized silicon) particles having UV-absorbing groups can be prepared economically as compared to the existing methods.
本发明涉及制备具有UV吸收基团的聚(有机氧化
硅)颗粒的方法,包括在碱的存在下,用从有机三烷氧基
硅烷、二有机烷氧基
硅烷和其混合物中选择的具有UV吸收基团的有机烷氧基
硅烷前体,与从四烷氧基
硅烷、烷基三烷氧基
硅烷、芳基三烷氧基
硅烷、二烷基二烷氧基
硅烷、二芳基二烷氧基
硅烷、芳基烷基二烷氧基
硅烷和其混合物中选择的
硅烷化合物作为交联调节剂和UV稳定增强剂进行反应,从而制备出具有UV吸收基团的聚(有机氧化
硅)颗粒,包括聚
硅藻土、
硅藻土-
硅氧烷共聚物、
硅藻土-
二氧化硅共聚物、
硅藻土-
硅氧烷-
二氧化硅共聚物和
硅藻土-
硅氧烷共聚物。这种具有UV吸收基团的聚(有机氧化
硅)颗粒显著解决了UV稳定性差的问题,同时保持了颗粒中所含UV吸收基团的UV吸收性能。由于具有UV吸收基团的聚(有机氧化
硅)颗粒不会产生白色浑浊,因此可以有效地用于化妆品。根据本发明,与现有方法相比,具有UV吸收基团的聚(有机氧化
硅)颗粒可以经济地制备。