Global Patent Index - EP 1263864 A1

EP 1263864 A1 2002-12-11 - CHAIN EXTENSION PROCESS

Title (en)

CHAIN EXTENSION PROCESS

Title (de)

KETTENVERLÄNGERUNGSVERFAHREN

Title (fr)

PROCEDE D'EXTENSION DE CHAINE

Publication

EP 1263864 A1 (EN)

Application

EP 01915913 A

Priority

  • NL 0100199 W
  • NL 1014604 A

Abstract (en)

[origin: WO0166633A1] The invention relates to a process for preparing a high-molecular polymer by contacting in a melt a difunctional lowermolecular polymer whose functional end groups are -OH or -NH2 groups with carbonylbislactamate, characterized in that the melt also contains an acid or a base as a catalyst. If the difunctional polymer contains a -COOH group, it is preferred for the melt also to contain a bisoxazine or a bisoxazoline.

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

C08K 5/35; C08G 63/91; C08G 69/20; C08G 69/48

IPC 8 full level (invention and additional information)

C08G 85/00 (2006.01); C08G 63/91 (2006.01); C08G 69/04 (2006.01); C08G 69/16 (2006.01); C08G 69/28 (2006.01); C08G 69/48 (2006.01)

CPC (invention and additional information)

C08G 69/28 (2013.01); C08G 63/916 (2013.01); C08G 69/04 (2013.01); C08G 69/16 (2013.01); C08G 69/48 (2013.01)

Citation (search report)

See references of WO 0166633A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0166633 A1 20010913; AU 4286101 A 20010917; CA 2402430 A1 20010913; CN 1416449 A 20030507; EP 1263864 A1 20021211; JP 2003525989 A 20030902; NL 1014604 C2 20010911

INPADOC legal status


2004-10-27 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040423

2003-09-10 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: DSM IP ASSETS B.V.

2003-09-03 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030717

2002-12-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020906

2002-12-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-12-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI