Global patent index - EP 1047720 A1

EP 1047720 A1 2000-11-02 - 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

EP 1047720 A1 (DE)

Application

EP 98962437 A

Priority

  • DE 19755415 A
  • EP 9808038 W

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 (main, further and additional classification)

C08G 65/20

IPC 8 full level (invention and additional information)

C08G 65/10 (2006.01); C08G 65/20 (2006.01); C08G 65/26 (2006.01)

CPC (invention and additional information)

C08G 65/2657 (2013.01); C08G 65/20 (2013.01)

Citation (search report)

See references of WO 9931164A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

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; MY 118608 A 20041231; TW 473495 B 20020121; US 6274700 B1 20010814; WO 9931164 A1 19990624

INPADOC legal status

2006-02-08 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20050802

2003-05-28 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20030409

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000605

2000-11-02 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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