Invention Grant
- Patent Title: Polyether carbonate polyol production method
- Patent Title (中): 聚醚碳酸酯多元醇生产方法
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Application No.: US14424171Application Date: 2013-08-23
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Publication No.: US09273183B2Publication Date: 2016-03-01
- Inventor: Thomas Ernst Müller , Christoph Gürtler , Matthias Wohak , Jörg Hofmann , Muhammad Afzal Subhani , Walter Leitner , Ilja Peckermann , Aurel Wolf
- Applicant: Bayer MaterialScience AG
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agency: Drinker Biddle & Reath LLP
- Priority: EP12181905 20120827
- International Application: PCT/EP2013/067578 WO 20130823
- International Announcement: WO2014/033070 WO 20140306
- Main IPC: C08G64/30
- IPC: C08G64/30 ; C08G65/26 ; C08G64/34 ; C08G18/48

Abstract:
The invention relates to a method for producing polyether carbonate polyols by attaching alkylene oxides and carbon dioxide to one or more H-functional starters in the presence of a double-metal cyanide catalyst, characterized in that (alpha) a suspending agent which contains no H-functional groups and is selected from among one or more compounds from the group consisting of aliphatic lactones, aromatic lactones, lactides, cyclic carbonates comprising at least three optionally substituted methylene groups between the oxygen atoms of the carbonate group, aliphatic cyclic anhydrides, and aromatic cyclic anhydrides, is provided in a reactor; (ss) optionally, a moiety of alkylene oxide is added to the mixture from step (alpha) at temperatures of 90 to 150 DEG C., and the addition of the alkylene oxide compound is then interrupted; and (gamma) one or more H-functional starters are continuously metered into the reactor during the reaction.
Public/Granted literature
- US20150225503A1 POLYETHER CARBONATE POLYOL PRODUCTION METHOD Public/Granted day:2015-08-13
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