Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1983-03-21
1984-06-12
Griffin, Ronald W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523100, 523414, 523424, C09D 356, C09D 358
Patent
active
044542658
ABSTRACT:
Aqueous thermosetting coating compositions adapted for roll coat application are disclosed in which water has dispersed therein an adduct of a diglycidyl ether of a bisphenol having a 1,2-epoxy equivalency of at least 1.2 and an average molecular weight of from about 2000 to about 5000 with a stoichiometric proportion, based on epoxy and secondary amine, of diprimary amine having a single secondary amine group and each primary amine group blocked by a ketimine group. At least about 50% of the amine groups of this adduct are protonated with a volatile acid, and the ketimine groups hydrolyze in the water to provide primary amine functionality and ketone solvent in the aqueous medium. From 20% to 50%, based on total resin solids, of water insoluble, heat-hardening phenol-formaldehyde resin curing agent is employed for cure. The curing agents are added to the adduct in solution in water-miscible organic solvent, and cresol-formaldehyde curing agents are preferred.
REFERENCES:
patent: 4096105 (1978-06-01), McGinniss
patent: 4105614 (1978-08-01), Davis et al.
patent: 4145323 (1979-03-01), Sekmakas et al.
patent: 4222918 (1980-09-01), Zentner et al.
patent: 4321305 (1982-03-01), Castellucci et al.
Roberts Donald R.
Tortorello Anthony J.
DeSoto, Inc.
Griffin Ronald W.
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