Global Patent Index - EP 1003803 A1

EP 1003803 A1 2000-05-31 - METHOD FOR PRODUCING POLYTETRAHYDROFURAN WITH LOW COLOUR INDEX

Title (en)

METHOD FOR PRODUCING POLYTETRAHYDROFURAN WITH LOW COLOUR INDEX

Title (de)

VERFAHREN ZUR HERSTELLUNG VON POLYTETRAHYDROFURAN MIT NIEDRIGER FARBZAHL

Title (fr)

PROCEDE POUR LA PREPARATION DE POLYTETRAHYDROFURANE A FAIBLE INDICE COLORIMETRIQUE

Publication

EP 1003803 A1 (DE)

Application

EP 98942627 A

Priority

  • DE 19735330 A
  • EP 9804673 W

Abstract (en)

[origin: DE19735330A1] The preparation of polytetrahydrofuran, tetrahydrofuran (THF) copolymers, their mono- and di-esters, with lower color index, involves polymerization in the presence of telomer and/or comonomer and also hydrogen, using a heterogeneous catalyst. The preparation of polytetrahydrofuran, tetrahydrofuran (THF) copolymers, their mono- and di-esters, with lower color index, comprises polymerizing THF in the presence of at least one telomer and/or comonomer using a heterogeneous catalyst and also hydrogen. SPECIFIC SUBSTANCES - The hydrogen pressure is 0.1-5 bar.

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

C08G 65/20

IPC 8 full level (invention and additional information)

B01J 23/24 (2006.01); C08G 65/20 (2006.01)

CPC (invention and additional information)

C08G 65/20 (2013.01); B01J 23/24 (2013.01)

Citation (search report)

See references of WO 9909086A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

DE 19735330 A1 19990218; AU 9069498 A 19990308; CA 2300969 A1 19990225; CN 1266444 A 20000913; EP 1003803 A1 20000531; ID 24269 A 20000713; JP 2001515110 A 20010918; KR 20010022842 A 20010326; US 6197979 B1 20010306; WO 9909086 A1 19990225

INPADOC legal status


2002-07-31 [18W] WITHDRAWN

- Date of withdrawal: 20020607

2000-05-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000115

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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