公开(公告)号：US20220227929A1

公开(公告)日：2022-07-21

申请号：US17596357

申请日：2020-07-29

申请人： Dow Global Technologies LLC

发明人： Marinus A. Bigi ,  Arjun Raghuraman

IPC分类号： C08G65/30 ,  B01J31/02

摘要： 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：US20220089813A1

公开(公告)日：2022-03-24

申请号：US17424259

申请日：2020-01-06

申请人： Dow Global Technologies LLC

发明人： Marinus A. Bigi ,  Nima Nikbin

IPC分类号： C08G64/40 ,  C08G64/02 ,  C08G64/30 ,  B01J20/26 ,  B01J20/18

摘要： 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.