EP 3898765 A1 20211027 - METHOD FOR PRODUCING A POLYESTER-POLYETHERPOLYOL BLOCK COPOLYMER
Title (en)
METHOD FOR PRODUCING A POLYESTER-POLYETHERPOLYOL BLOCK COPOLYMER
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES POLYESTER-POLYETHERPOLYOL-BLOCKCOPOLYMERS
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN COPOLYMÈRE BLOC POLYESTER-POLYETHERPOLYOL
Publication
Application
Priority
- EP 18215182 A 20181221
- EP 2019085305 W 20191216
Abstract (en)
[origin: WO2020127016A1] The invention relates to a method for producing a polyester-polyetherpolyol block copolymer by reacting a H-functional starter substance with lactone in the presence of a catalyst to form a polyester and subsequently the reaction of the polyester from step i) with alkylene oxides in the presence of a catalyst (B), wherein the lactone is a four-membered lactone. The invention also relates to the polyester-polyetherpolyol block copolymer that can be obtained from the present method.
IPC 8 full level
C08G 63/66 (2006.01)
CPC (source: EP US)
C08G 63/66 (2013.01 - EP US); C08G 65/2615 (2013.01 - US); C08G 65/2663 (2013.01 - US); C08L 75/08 (2013.01 - US); C08G 63/82 (2013.01 - EP); C08G 65/2615 (2013.01 - EP); C08G 65/2663 (2013.01 - EP)
Citation (search report)
See references of WO 2020127016A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3670571 A1 20200624; EP 3898765 A1 20211027; US 2022056207 A1 20220224; WO 2020127016 A1 20200625
DOCDB simple family (application)
EP 18215182 A 20181221; EP 19817744 A 20191216; EP 2019085305 W 20191216; US 201917312470 A 20191216