Preparation of thermoplastic polyesters having a low content of

Details Preparation of thermoplastic polyesters having a low content of Preparation of thermoplastic polyesters having a low content of

1995-01-10

1996-03-05

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528272, 528275, 524765, C08K 509

Patent

active

054968879

ABSTRACT:
Thermoplastic polyesters are prepared by polycondensation of dihydroxy compounds with dicarboxylic acids or their esters or ester-forming derivatives by a process in which an alkali metal compound or an alkaline earth metal compound is added in an amount of less than 1 mmol, calculated as alkali metal or alkaline earth metal, per kg of polyester.

REFERENCES:
patent: 4436893 (1984-03-01), Cholod
patent: 4705844 (1987-11-01), Espnschied et al.
patent: 4880860 (1989-11-01), Blo/ cker

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