Method for preparing polyester-polyepoxide compositions of high

Details Method for preparing polyester-polyepoxide compositions of high Method for preparing polyester-polyepoxide compositions of high

1989-03-13

1990-06-12

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528275, 528286, 528288, 528289, 528291, 5283081, 5283083, 525438, 525440, 524174, 524186, 524401, C08G 6302

Patent

active

049334298

ABSTRACT:
Polyesters, especially poly(ethylene terephthalate) and poly(butylene terephthalate), having a substantial proportion of free carboxylic acid groups are caused to react with polyepoxy compounds, especially poly(O- or N-epoxyalkyl-substituted) cyclic amides, imides and amidates and preferably triglycidyl isocyanurate, in the presence of various amines or salts as catalysts. The preferred catalysts are fatty acid salts such as sodium sterate. The products have very high melt viscosities and are useful in such operations as blow molding.

REFERENCES:
patent: 4101601 (1978-07-01), Thomas

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