EP 1070092 A1 20010124 - 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
Application
Priority
- DE 19814529 A 19980401
- EP 9902029 W 19990325
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
IPC 8 full level
C08G 63/78 (2006.01); C08J 5/00 (2006.01); C08L 67/02 (2006.01); C08L 69/00 (2006.01); C08L 77/00 (2006.01); C08G 63/183 (2006.01)
CPC (source: EP KR US)
C08G 63/78 (2013.01 - EP KR US); C08L 67/02 (2013.01 - EP US); C08L 77/00 (2013.01 - EP US); C08G 63/183 (2013.01 - EP US)
Citation (search report)
See references of WO 9950333A1
Designated contracting state (EPC)
BE DE FR GB IT LU NL
DOCDB simple family (publication)
DE 19814529 A1 19991007; CN 1154680 C 20040623; CN 1295588 A 20010516; EP 1070092 A1 20010124; JP 2002509963 A 20020402; KR 20010042360 A 20010525; US 6232435 B1 20010515; WO 9950333 A1 19991007
DOCDB simple family (application)
DE 19814529 A 19980401; CN 99804602 A 19990325; EP 9902029 W 19990325; EP 99915704 A 19990325; JP 2000541230 A 19990325; KR 20007010925 A 20000930; US 64617400 A 20000914