Invention Grant
- Patent Title: Multistage colored polymer particle and skin care formulations comprising same
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Application No.: US16754432Application Date: 2018-10-03
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Publication No.: US11058612B2Publication Date: 2021-07-13
- Inventor: Xiaodong Lu , Xiang Qian Liu , Fanwen Zeng , Junsi Gu , Wen-Shiue Young
- Applicant: Rohm and Haas Company
- Applicant Address: US PA Collegeville
- Assignee: Rohm and Haas Company
- Current Assignee: Rohm and Haas Company
- Current Assignee Address: US PA Collegeville
- Agent Thomas S. Deibert
- International Application: PCT/US2018/054101 WO 20181003
- International Announcement: WO2019/089173 WO 20190509
- Main IPC: A61K8/02
- IPC: A61K8/02 ; A61K8/81 ; A61Q1/02 ; A61Q19/00 ; C09B69/10

Abstract:
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.
Public/Granted literature
- US20200315928A1 MULTISTAGE COLORED POLYMER PARTICLE AND SKIN CARE FORMULATIONS COMPRISING SAME Public/Granted day:2020-10-08
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