Invention Application
- Patent Title: PURIFICATION PROCESS FOR POLYETHER-CARBONATE POLYOLS
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Application No.: PCT/US2020/012339Application Date: 2020-01-06
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Publication No.: WO2020159669A1Publication Date: 2020-08-06
- Inventor: BIGI, Marinus A. , NIKBIN, Nima
- Applicant: DOW GLOBAL TECHNOLOGIES LLC
- Applicant Address: 2040 Dow Center Midland, Michigan 48674 US
- Assignee: DOW GLOBAL TECHNOLOGIES LLC
- Current Assignee: DOW GLOBAL TECHNOLOGIES LLC
- Current Assignee Address: 2040 Dow Center Midland, Michigan 48674 US
- Agency: COHN, Gary C.
- Priority: US62/799,172 20190131
- Main IPC: C08G64/40
- IPC: C08G64/40 ; C08G64/34
Abstract:
Alkylene carbonates are removed from polyether-carbonate polymers by contacting the polyether-carbonate with an absorbent at a temperature of 30 to 150°C. The process is effective and inexpensive. The purified polyether-carbonate is useful for making polyurethanes as well as in many other applications.
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