Method of making and polymer of heat resistant polyester using d

Details Method of making and polymer of heat resistant polyester using d Method of making and polymer of heat resistant polyester using d

1983-10-11

1984-07-10

Phynes, Lucille M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528288, 528289, 528297, 525440, C08G 6376

Patent

active

044593929

ABSTRACT:
This invention is a polymer and a method of making heat resistant polyester characterized by reacting the polyester, consisting of aromatic dicarboxylic acid and the glycol component with 2-6 carbons, with 0.1-5 weight % of the bifunctional epoxy compound which is expressed by the following general formula (A) or (B): ##STR1## (R is a divalent organic group) and has 2 or 3 carbonyl groups adjacent to the nitrogen atom, to reduce the amount of the end carboxyl group to below 15 g equivalent/10.sup.6 g polymer.

REFERENCES:
patent: 3937751 (1976-02-01), Schmid et al.

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