EP 1047720 A1 20001102 - CATALYST AND METHOD FOR PRODUCING POLYTETRAHYDROFURAN
Title (en)
CATALYST AND METHOD FOR PRODUCING POLYTETRAHYDROFURAN
Title (de)
KATALYSATOR UND VERFAHREN ZUR HERSTELLUNG VON POLYTETRAHYDROFURAN
Title (fr)
CATALYSEUR ET PROCEDE POUR LA PRODUCTION DE POLYTETRAHYDROFURANE
Publication
Application
Priority
- DE 19755415 A 19971212
- EP 9808038 W 19981210
Abstract (en)
[origin: DE19755415A1] The invention relates to a method for producing polytetrahydrofuran and polytetrahydrofuran copolymers, diesters or monoesters thereof by polymerising tetrahydrofuran in the presence of at least one telogen and/or comonomer on acid- activated montmorillonite catalysts, whereby the ratio of the montmorillonite structure to the sum of the muscovite and kaolin structure in the montmorillonite catalyst, which is determined from the intensities of the reflexes measured at 5.5 DEG 2È for montmorillonite, 9.0 DEG 2È for muscovite and 12,5 DEG 2È for kaolin is, after acid activation, at least 5:1.
IPC 1-7
IPC 8 full level
C08G 65/10 (2006.01); C08G 65/20 (2006.01); C08G 65/26 (2006.01)
CPC (source: EP KR US)
C08G 65/20 (2013.01 - EP KR US); C08G 65/2642 (2013.01 - KR); C08G 65/2657 (2013.01 - EP KR US)
Citation (search report)
See references of WO 9931164A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
DE 19755415 A1 19990617; AU 1760499 A 19990705; CA 2313186 A1 19990624; CN 1100079 C 20030129; CN 1281477 A 20010124; EP 1047720 A1 20001102; JP 2002508418 A 20020319; KR 20010033012 A 20010425; MY 118608 A 20041231; TW 473495 B 20020121; US 6274700 B1 20010814; WO 9931164 A1 19990624
DOCDB simple family (application)
DE 19755415 A 19971212; AU 1760499 A 19981210; CA 2313186 A 19981210; CN 98812121 A 19981210; EP 9808038 W 19981210; EP 98962437 A 19981210; JP 2000539079 A 19981210; KR 20007006364 A 20000610; MY PI9805594 A 19981210; TW 87120299 A 19981208; US 55587200 A 20000608