Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-02-21
1990-09-18
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523402, 523412, C08G 5914, C08L 6300
Patent
active
049579525
ABSTRACT:
Thermosetting aqueous anionic electrocoating composition are disclosed which comprise a carboxyl-functional anionic polymer dispersed in water with the aid of water miscible organic solvent and a volatile base, and from about 1% to about 5%, based on the weight of the polymer content of the composition, of an oxirane-free epoxy phosphate, this epoxy phosphate being produced by slowly and incrementally adding a resinous polyepoxide to a solvent solution containing from 0.05 to 0.9 mole of orthophosphoric acid per oxirane equivalent in the polyepoxide together with sufficient water to hydrolyze all of the oxirane functionality which is not consumed by the orthophosphoric acid. These epoxy phosphates improve the corrosion resistance of electrodeposited cured coatings without objectionably wrinkling their surface.
REFERENCES:
patent: 4397970 (1983-08-01), Campbell
patent: 4425451 (1984-01-01), Sekmakas
patent: 4461857 (1984-07-01), Sekmakas
patent: 4598109 (1986-07-01), Sekmakas
Parenti Aurelio
Sekmakas Kazys
DeSoto, Inc.
Doody Patrick A.
Michl Paul R.
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