Invention Grant
- Patent Title: Method for producing SiOH-functional polysiloxanes
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Application No.: US14899153Application Date: 2014-06-18
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Publication No.: US09988498B2Publication Date: 2018-06-05
- Inventor: Georg Loessel , Manfred Meisenberger , Wolfgang Wewers
- Applicant: Wacker Chemie AG
- Applicant Address: DE Munich
- Assignee: WACKER CHEMIE AG
- Current Assignee: WACKER CHEMIE AG
- Current Assignee Address: DE Munich
- Agency: Brooks Kushman P.C.
- Priority: DE102013212980 20130703
- International Application: PCT/EP2014/062873 WO 20140618
- International Announcement: WO2015/000706 WO 20150108
- Main IPC: C08G77/16
- IPC: C08G77/16 ; C08G77/06

Abstract:
Organopolysiloxanes having an OH content of from 3.0-10.0 weight percent are continuously produced by continuously feeding chlorosilanes, alkoxysilanes, water, and nonpolar solvent essentially non-miscible in water, continuously discharging a reaction mixture containing organopolysiloxanes dissolved in a solvent phase, and optionally separating organopolysiloxanes from the solvent phase, wherein the chlorosilanes and alkoxysilanes are added in respective weight fractions of 95-60% and 5-40% based on the total weight of chlorosilanes and alkoxysilanes. The process does not employ and polar solvents, and produces products with improved flash points while minimizing complexity and expense of waste water treatment.
Public/Granted literature
- US20160145396A1 METHOD FOR PRODUCING SiOH-FUNCTIONAL POLYSILOXANES Public/Granted day:2016-05-26
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