EP 3883980 A1 20210929 - PROCESS FOR PRODUCING POLYOXYMETHYLENE-POLYALKYLENE OXIDE BLOCK COPOLYMERS
Title (en)
PROCESS FOR PRODUCING POLYOXYMETHYLENE-POLYALKYLENE OXIDE BLOCK COPOLYMERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLEN-POLYALKYLENOXID-BLOCKCOPOLYMEREN
Title (fr)
PROCÉDÉ DE PRÉPARATION DE COPOLYMÈRES SÉQUENCÉS D'OXYDE DE POLYALKYLÈNE DE POLYOXYMÉTHYLÈNE
Publication
Application
Priority
- EP 18207807 A 20181122
- EP 2019081407 W 20191114
Abstract (en)
[origin: WO2020114751A1] In a process for producing polyoxymethylene-polyalkylene oxide block copolymers comprising the step of polymerizing an alkylene oxide in the presence of an OH-terminated polyoxymethylene polymer and a catalyst, the polyoxymethylene polymer has a number-average molecular weight Mn determined after derivatization with propylene oxide and gel permeation chromatography against polystyrene standards with tetrahydrofuran as the eluent of ≥ 1100 g/mol to ≤ 2300 g/mol and the ratio of alkylene oxide to polyoxymethylene polymer is ≥ 0.05 mol/g. The invention further relates to copolymers obtainable by the process, to a process for producing polyurethane polymers using these copolymers and to polyurethanes obtainable therefrom.
IPC 8 full level
C08G 2/22 (2006.01); C08G 2/38 (2006.01); C08G 18/44 (2006.01); C08G 18/48 (2006.01); C08G 18/56 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C08G 18/76 (2006.01); C08G 18/79 (2006.01); C08G 64/18 (2006.01)
CPC (source: EP US)
C08G 2/22 (2013.01 - EP); C08G 2/38 (2013.01 - EP US); C08G 18/10 (2013.01 - US); C08G 18/4825 (2013.01 - EP US); C08G 18/4866 (2013.01 - EP); C08G 18/546 (2013.01 - US); C08G 18/56 (2013.01 - EP US); C08G 18/73 (2013.01 - EP US); C08G 18/755 (2013.01 - EP); C08G 18/7621 (2013.01 - EP US); C08G 18/7664 (2013.01 - EP); C08G 18/7671 (2013.01 - EP US); C08G 18/792 (2013.01 - EP); C08G 64/183 (2013.01 - EP); C08G 65/2603 (2013.01 - US); C08G 65/2663 (2013.01 - US); C08L 75/08 (2013.01 - US)
Citation (search report)
See references of WO 2020114751A1
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 3656797 A1 20200527; CN 113195575 A 20210730; EP 3883980 A1 20210929; US 2022119579 A1 20220421; WO 2020114751 A1 20200611
DOCDB simple family (application)
EP 18207807 A 20181122; CN 201980076931 A 20191114; EP 19802180 A 20191114; EP 2019081407 W 20191114; US 201917288672 A 20191114