EP 0701581 A1 19960320 - PROCESSING OF POLYESTERS
Title (en)
PROCESSING OF POLYESTERS
Title (de)
BEARBEITUNG VON POLYESTERN
Title (fr)
TRAITEMENT DE POLYESTERS
Publication
Application
Priority
- GB 9401182 W 19940601
- GB 9311401 A 19930602
Abstract (en)
[origin: WO9428048A1] A process for improving mechanical properties of an aged polyester composition comprising at least one polyhydroxyalkanoate (PHA) and at least one plasticiser thereof, which comprises heating at a temperature whereby (i) the polyester is restored to its original non-aged properties, and (ii) subsequent ageing of the polyester is retarded as indicated by substantial improvement of at least one measurement indicative of ageing compared to non heat treated polyester of the same age. The invention includes a polyester composition and shaped articles which have been subjected to the process and in which ageing is retarded.
IPC 1-7
IPC 8 full level
B29C 71/02 (2006.01); C08G 63/88 (2006.01); C08K 5/00 (2006.01); C08L 67/00 (2006.01); C08L 67/04 (2006.01)
CPC (source: EP)
B29C 71/02 (2013.01); C08G 63/88 (2013.01); B29K 2067/00 (2013.01)
Citation (search report)
See references of WO 9428048A1
Designated contracting state (EPC)
AT BE CH DE DK FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9428048 A1 19941208; AU 6851494 A 19941220; CA 2163443 A1 19941208; EP 0701581 A1 19960320; GB 9311401 D0 19930721; JP H09504808 A 19970513
DOCDB simple family (application)
GB 9401182 W 19940601; AU 6851494 A 19940601; CA 2163443 A 19940601; EP 94917075 A 19940601; GB 9311401 A 19930602; JP 50041995 A 19940601