Global Patent Index - EP 0991694 A1

EP 0991694 A1 2000-04-12 - METHOD FOR PRODUCING POLYTETRAHYDROFURAN

Title (en)

METHOD FOR PRODUCING POLYTETRAHYDROFURAN

Title (de)

VERFAHREN ZUR HERSTELLUNG VON POLYTETRAHYDROFURAN

Title (fr)

PROCEDE DE FABRICATION DE POLYTETRAHYDROFURANNE

Publication

EP 0991694 A1 (DE)

Application

EP 98933602 A

Priority

  • DE 19726507 A
  • EP 9803519 W

Abstract (en)

[origin: DE19726507A1] The invention relates to a method for producing polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of tetrahydrofuran in the presence of at least one telogene and/or comonomer on a sulfate-containing heterogeneous supported catalyst. A sulfate-containing heterogeneous supported catalyst is used containing at least one metal sulfate, metal hydrogen sulfate, metal oxide sulfate or mixtures thereof.

IPC 1-7 (main, further and additional classification)

C08G 65/10; C08G 65/20; C07C 67/24

IPC 8 full level (invention and additional information)

C08G 65/10 (2006.01); B01J 27/053 (2006.01); C08G 65/20 (2006.01); C08G 65/26 (2006.01)

CPC (invention and additional information)

B01J 27/053 (2013.01); C08G 65/20 (2013.01); C08G 65/2693 (2013.01)

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

DE 19726507 A1 19981224; CA 2294028 A1 19981230; CN 1261381 A 20000726; EP 0991694 A1 20000412; JP 2002504950 A 20020212; KR 20010014083 A 20010226; TW 460504 B 20011021; US 6124368 A 20000926; WO 9858982 A1 19981230

INPADOC legal status


2003-02-05 [18W] WITHDRAWN

- Effective date: 20021210

2002-06-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020510

2000-04-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991202

2000-04-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB IT NL