Process for preparation of water-thinnable epoxy resins

Details Process for preparation of water-thinnable epoxy resins Process for preparation of water-thinnable epoxy resins

1981-03-06

1982-05-25

Griffin, Ronald W.

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

Synthetic resins

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

528110, 5281113, 523414, 524901, C09D 352, C09D 358, C09D 540

Patent

active

043315747

ABSTRACT:
Resinous compounds suitable for aqueous thermosetting coating dispersions or solutions after neutralization, are prepared by reacting a diglycidyl ether of a dihydric phenol with a hydroxyalkane monocarboxylic acid and dimerized unsaturated fatty acids, with epoxy equal to or in slight excess over carboxyl, below 150.degree. C. in the presence of an epoxy/carboxyl esterification catalyst to produce a non-acidic intermediate, and then reacting the intermediate at a temperature below 150.degree. C. with a polycarboxylic acid anhydride in amounts to provide an acid value from 5 to 35. Aqueous dispersions are prepared by at least 50% neutralization of such compounds having acid value 5-15.

REFERENCES:
patent: 2658885 (1953-11-01), D'Alelio
patent: 3336241 (1967-08-01), Shokal
patent: 3707526 (1972-12-01), Gannon et al.
patent: 3749758 (1973-07-01), Gannon
patent: 4051088 (1977-09-01), Gibson
patent: 4098735 (1978-07-01), Tobias
patent: 4119595 (1978-10-01), Bauer et al.
patent: 4123454 (1978-10-01), Buxbaum

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