公开(公告)号：US20210332183A1

公开(公告)日：2021-10-28

申请号：US17312574

申请日：2019-12-16

申请人： Covestro Intellectual Property GmbH & Co. KG

发明人： Martin Machat ,  Aurel Wolf ,  Christoph Guertler ,  Markus Meuresch

IPC分类号： C08G63/08 ,  C08G63/82 ,  C09D167/04 ,  C09J167/04

摘要： The invention relates to a process for producing a polyester by reacting a H-functional starter substance with a lactone in the presence of a catalyst, wherein the H-functional compound has one or more free carboxyl groups, wherein the lactone is a four-membered ring lactone, and wherein the catalyst is a Brönsted acid or a double metal cyanide (DMC) catalyst. The invention also relates to the polyester that can be obtained by the present invention.

公开(公告)号：US20220056207A1

公开(公告)日：2022-02-24

申请号：US17312470

申请日：2019-12-16

申请人： Covestro Intellectual Property GmbH & Co. KG

发明人： Markus Meuresch ,  Christoph Guertler ,  Aurel Wolf ,  Martin Machat

IPC分类号： C08G65/26 ,  C08L75/08 ,  C08G63/66

摘要： The present invention relates to a process for preparing a polyester-polyether polyol block copolymer by reaction of an H-functional starter substance with lactone in the presence of a catalyst to afford a polyester followed by reaction of the polyester from step i) with alkylene oxides in the presence of a catalyst (B), wherein the lactone is a 4-membered lactone. The invention further relates to the polyester-polyether polyol block copolymer obtainable by the present process.