Low VOC, high molecular weight epoxy emulsion coatings

Details Low VOC, high molecular weight epoxy emulsion coatings Low VOC, high molecular weight epoxy emulsion coatings

1992-06-12

1993-10-12

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523423, 525107, C08K 320

Patent

active

052526372

ABSTRACT:
Coating compositions containing aqueous dispersions of higher molecular weight epoxy resin are produced by advancing the molecular weight of an aqueous dispersion of a low molecular weight epoxy resin having a number average molecular weight between about 360 and 2,000. The water dispersed low molecular weight epoxy resins are advanced in molecular weight by coreaction with diphenol at temperatures above about 105.degree. C. and at pressures above about 5 psig to produce the aqueous dispersed high molecular weight epoxy resin. The aqueous dispersed high molecular weight epoxy resin can be further copolymerized with ethylenic monomers, if desired, to produce an acrylic epoxy emulsion binder useful in protective coatings.

REFERENCES:
patent: 4122067 (1978-10-01), Anderson
patent: 4212776 (1980-07-01), Martinez et al.

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