EP 3898759 A1 20211027 - PROCESS FOR PREPARING A POLYESTER USING A 4-MEMBERED RING LACTONE
Title (en)
PROCESS FOR PREPARING A POLYESTER USING A 4-MEMBERED RING LACTONE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES POLYESTERS MITTELS EINES 4-GLIEDRIGEN RINGLACTONS
Title (fr)
PROCÉDÉ DE PRÉPARATION D'UN POLYESTER AU MOYEN D'UNE LACTONE CYCLIQUE À 4 CHAÎNONS
Publication
Application
Priority
- EP 18215195 A 20181221
- EP 2019085296 W 20191216
Abstract (en)
[origin: WO2020127008A1] The invention provides a process for preparing polyesters by reacting an H-functional starter substance with a lactone in the presence of a Brønsted-acidic catalyst which comprises initially charging the H-functional starter substance and the Brønsted-acidic catalyst to form a mixture i) and subsequently adding the lactone to the mixture i), wherein the process is carried out without adding an aromatic solvent and wherein the H-functional starter substance is an OH-functional starter substance and/or a COOH-functional starter substance and wherein the lactone is a 4-membered ring lactone. The invention further provides polyesters obtainable by the method of the invention.
IPC 8 full level
C08G 63/08 (2006.01); C08G 63/82 (2006.01); C08G 63/87 (2006.01)
CPC (source: EP US)
C08G 63/08 (2013.01 - EP US); C08G 63/823 (2013.01 - EP US); C08L 75/06 (2013.01 - US)
Citation (search report)
See references of WO 2020127008A1
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
DOCDB simple family (publication)
EP 3670569 A1 20200624; EP 3898759 A1 20211027; US 2022049051 A1 20220217; WO 2020127008 A1 20200625
DOCDB simple family (application)
EP 18215195 A 20181221; EP 19817741 A 20191216; EP 2019085296 W 20191216; US 201917312485 A 20191216