Global patent index - EP 1023333 A1

EP 1023333 A1 2000-08-02 - PROCESSES FOR IMPROVING STABILITY OF LIVING POLYMERIZATION CHAIN ENDS

Title (en)

PROCESSES FOR IMPROVING STABILITY OF LIVING POLYMERIZATION CHAIN ENDS

Title (de)

VERFAHREN ZUR VERBESSERUNG DER STABILITÄT DER ENDGRUPPEN VON LEBENDEN POLYMEREN

Title (fr)

PROCEDES D'AMELIORATION DE LA STABILITE D'EXTREMITES DE CHAINES DE POLYMERISATION VIVANTES

Publication

EP 1023333 A1 (EN)

Application

EP 98945954 A

Priority

  • US 9818707 W
  • US 5833697 P

Abstract (en)

[origin: WO9912979A1] Initiator compositions capable of imparting improved thermal stability of living polymerization chain ends and processes of using the same. The compositions include an alkyllithium initiator and a silyl ether. The silyl ether can be incorporated into the initiator (as a protected functionalized initiator), or as a separate small molecule added to the initiator solution.

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

C08F 4/58; C08F 4/48; C08F 4/72; C08F 36/04

IPC 8 full level (invention and additional information)

C08F 4/48 (2006.01); C08F 4/58 (2006.01); C08F 4/72 (2006.01); C08F 12/00 (2006.01); C08F 36/00 (2006.01); C08F 36/04 (2006.01); C08F 297/04 (2006.01)

CPC (invention and additional information)

C08F 4/58 (2013.01); C08F 36/04 (2013.01)

Combination set (CPC)

C08F 36/04 + C08F 4/58

Citation (search report)

See references of WO 9912979A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 9912979 A1 19990318; AU 9308598 A 19990329; BR 9811773 A 20000829; EP 1023333 A1 20000802; JP 2001515929 A 20010925; TW 580503 B 20040321

INPADOC legal status

2002-11-27 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20020930

2000-08-02 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000306

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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