Process for stabilizing polyester compositions

Details Process for stabilizing polyester compositions Process for stabilizing polyester compositions

1980-06-27

1981-11-17

Nielsen, Earl A.

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

Synthetic resins

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

525531, 526274, 526309, 526320, 528108, 528365, C08G 5916

Patent

active

043012612

ABSTRACT:
The present invention provides an improved process for reducing the premature gelation during esterification of epoxy compounds containing tertiary, allylic or benzylic hydrogens (e.g., saturated epoxy resins) with ethylenically unsaturated monocarboxylic acids (e.g., acrylic acid) wherein the epoxy compound in pre-reacted with a trialkylphosphite (e.g., triethylphosphite) prior to the esterification.

REFERENCES:
patent: 2658885 (1953-11-01), D'Alelio
patent: 3336241 (1967-08-01), Shokal
patent: 3408422 (1968-10-01), May
patent: 3524903 (1970-08-01), Hargis
patent: 3634542 (1972-01-01), Dowd
patent: 4025692 (1977-05-01), Yamagishi et al.

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