公开(公告)号：WO2021021845A1

公开(公告)日：2021-02-04

申请号：PCT/US2020/043936

申请日：2020-07-29

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： BIGI, Marinus A. ,  RAGHURAMAN, Arjun

IPC: C08G65/30

Abstract: A process for purifying a polyether polyol including treating the polyether polyol with a mixture of: (i) a sulfonic acid catalyst, wherein the catalyst includes a substituted or unsubstituted alkyl group of at least 6 carbon atoms, and (ii) water to reduce residual levels of acetal linkages present in the polyether polyol; a purified polyether polyol prepared using the above treatment process; and a polyurethane product prepared by reacting the above purified polyether polyol and an isocyanate.

公开(公告)号：WO2020159669A1

公开(公告)日：2020-08-06

申请号：PCT/US2020/012339

申请日：2020-01-06

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： BIGI, Marinus A. ,  NIKBIN, Nima

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.

公开(公告)号：WO2019005767A1

公开(公告)日：2019-01-03

申请号：PCT/US2018/039459

申请日：2018-06-26

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： BIGI, Marinus A. ,  CUTHBERT, John B.

IPC: C10M169/04

Abstract: The effectiveness of a diarylamine antioxidant in a polyalkylene glycol base stock is improved by using an effective amount of a trialkanolamine antioxidant enhancing agent.

公开(公告)号：WO2020068539A1

公开(公告)日：2020-04-02

申请号：PCT/US2019/051862

申请日：2019-09-19

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： BIGI, Marinus A. ,  NIKBIN, Nima

IPC: C08G65/30 ,  C08G64/40 ,  C08G64/34

Abstract: In various embodiments, a process for reducing alkylene carbonate content in a crude polyether polycarbonate polyol effluent including the alkylene carbonate and polyether polycarbonate polyol includes mixing the crude polyether polycarbonate polyol effluent with an aqueous wash solution including an inorganic salt, and allowing the mixture of crude polyether polycarbonate polyol effluent and aqueous wash solution to separate into a first aqueous phase including alkylene carbonate, and a first organic phase including the polyether polycarbonate polyol and an amount of alkylene carbonate that is less than the amount of alkylene carbonate in the crude polyether polycarbonate polyol effluent.