Global patent index - EP 1070092 A1

EP 1070092 A1 2001-01-24 - POLYALKYLENE ARYLATES CONTAINING A HIGH PROPORTION OF CARBOXYL END GROUPS

Title (en)

POLYALKYLENE ARYLATES CONTAINING A HIGH PROPORTION OF CARBOXYL END GROUPS

Title (de)

POLYALKYLENARYLATE MIT HOHEM CARBOXYLENDGRUPPENGEHALT

Title (fr)

POLYALKYLENE ARYLATES A FORTE TENEUR EN GROUPES TERMINAUX CARBOXYLE

Publication

EP 1070092 A1 (DE)

Application

EP 99915704 A

Priority

  • DE 19814529 A
  • EP 9902029 W

Abstract (en)

[origin: DE19814529A1] According to the inventive method for producing polyalkylene arylates, an aromatic dicarboxylic acid or its esters or ester-forming derivatives is/are esterified or transesterified with a molar excess of an aliphatic dihydroxy compound and the resulting transesterification or esterification product is polycondensed. The invention is characterised in that the prepolymer is polycondensed with a viscosity number (VZ) of < 30 ml/g in the presence of an oxygen-containing gas.

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

C08G 63/78; C08G 63/18; C08L 67/02; C09D 167/02

IPC 8 full level (invention and additional information)

C08J 5/00 (2006.01); C08G 63/78 (2006.01); C08L 67/02 (2006.01); C08L 69/00 (2006.01); C08L 77/00 (2006.01); C08G 63/183 (2006.01)

CPC (invention and additional information)

C08L 77/00 (2013.01); C08G 63/78 (2013.01); C08L 67/02 (2013.01); C08G 63/183 (2013.01)

Combination set (CPC)

  1. C08L 67/02 + C08L 69/00
  2. C08L 67/02 + C08L 77/00
  3. C08L 77/00 + C08L 67/03
  4. C08L 77/00 + C08L 67/02

Citation (search report)

See references of WO 9950333A1

Designated contracting state (EPC)

BE DE FR GB IT LU NL

EPO simple patent family

DE 19814529 A1 19991007; CN 1154680 C 20040623; CN 1295588 A 20010516; EP 1070092 A1 20010124; JP 2002509963 A 20020402; US 6232435 B1 20010515; WO 9950333 A1 19991007

INPADOC legal status

2004-06-30 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Effective date: 20040505

2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000901

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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