Christine P Bashleben

US Patent:

45297673, Jul 16, 1985

Filed:

Apr 2, 1984

Appl. No.:

6/596057

Inventors:

Christine P. Bashleben - Wheeling IL
Gregory D. Shay - Oak Forest IL
Alfred E. Smith - Mount Prospect IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

B32B 2708

US Classification:

524323

Abstract:

A thermosetting latex paint is disclosed which cures to provide better gloss and gloss retention of ultraviolet exposure. This latex paint comprises water having suspended therein copolymer particles of aqueous emulsion copolymerized monomers consisting essentially of monoethylenically unsaturated monomers including at least about 30% up to about 80% of vinyl acetate, the balance of the monomers in the copolymer including from 2% up to about 15% of monomers providing reactive hydrogen atoms, like hydroxyethyl methacrylate, to enable the copolymer to thermoset in the presence of a curing agent which reacts with the reactive hydrogen atoms of the copolymer, like hexamethoxymethyl melamine. The copolymer particles are suspended in the water by surfactant comprising at least 2% up to about 8%, based on total monomers, of an ethylene oxide adduct of an alkyl-substituted phenol having from 10-18 carbon atoms in the alkyl group with 5-14 moles of adducted ethylene oxide per mole of said substituted phenol. This surfactant is preferably incorporated by being present during the aqueous emulsion copolymerization which formed the latex.