Invention Grant
- Patent Title: Method for producing polyether carbonate polyols
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Application No.: US15323362Application Date: 2015-06-30
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Publication No.: US10040901B2Publication Date: 2018-08-07
- Inventor: Jörg Hofmann , Stefanie Braun , Kai Laemmerhold , Aurel Wolf , Michael Traving
- Applicant: Covestro Deutschland AG
- Applicant Address: DE Leverkusen
- Assignee: COVESTRO DEUTSCHLAND AG
- Current Assignee: COVESTRO DEUTSCHLAND AG
- Current Assignee Address: DE Leverkusen
- Agency: K&L Gates LLP
- Priority: EP14175607 20140703
- International Application: PCT/EP2015/064808 WO 20150630
- International Announcement: WO2016/001206 WO 20160107
- Main IPC: C08G64/34
- IPC: C08G64/34 ; C08G65/26

Abstract:
The invention relates to a method for producing polyether carbonate polyols by binding alkylene oxides and carbon dioxide to one or more H-functional starter substance/s in the presence of a double metal cyanide (DMC) catalyst, characterized in that (y) one or more H-functional starter substance/s and DMC catalyst are continuously metered into the reactor during the binding process, and the free alkylene oxide concentration in the reaction mixture amounts to 1.5 to 5.0 wt %, and the obtained reaction mixture is continuously discharged from the reactor.
Public/Granted literature
- US20170137569A1 Method for Producing Polyether Carbonate Polyols Public/Granted day:2017-05-18
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