Invention Grant
- Patent Title: Method for improving the color index of organopolysiloxanes
- Patent Title (中): 改善有机聚硅氧烷颜色指数的方法
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Application No.: US13132139Application Date: 2009-11-27
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Publication No.: US08481775B2Publication Date: 2013-07-09
- Inventor: Friedhelm Nickel , Peter Will
- Applicant: Friedhelm Nickel , Peter Will
- Applicant Address: NL Heerlen
- Assignee: DSM IP Assets B.V.
- Current Assignee: DSM IP Assets B.V.
- Current Assignee Address: NL Heerlen
- Agency: Nixon & Vanderhye P.C.
- Priority: EP08170373 20081201
- International Application: PCT/EP2009/065971 WO 20091127
- International Announcement: WO2010/063649 WO 20100610
- Main IPC: C07F7/08
- IPC: C07F7/08
Abstract:
The present invention relates to method for improving the color index of organopolysiloxanes functionalized with at least one UV-light absorbing group said method comprising the step of contacting said group carrying organopolysiloxanes with a hydroxy carboxylic acid or a cyclic ester thereof in an organic solvent.
Public/Granted literature
- US20110294964A1 NOVEL PROCESS Public/Granted day:2011-12-01
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