Xiaodong Lu,Xiang Qian Liu,Fanwen Zeng,Junsi Gu,Wen-Shiue Young
申请号：
US16754432
公开号：
US20200315928A1
申请日:
2018.10.03
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A multistage colored polymer particle is provided, having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer； an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer； a monoethylenically unsaturated carboxylic acid inner shell monomer； optionally, an aliphatic inner shell monomer； and, optionally, a first polymerizable dye monomer； an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer； a monoethylenically unsaturated non-carboxylic acid outer shell monomer； optionally, a second polymerizable dye monomer； and, optionally, an aliphatic outer shell monomer； wherein the core, when dry, contains at least one void； and wherein the multistage colored polymer particle comprises polymerized units of polymerizable dye monomer. Skin care formulations comprising multistage colored polymer particles and methods of using same are also provided.
