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US 5,344,858 AGranted
Coating from phosphated epoxy and COOH-vinyl addition resins
AssigneePPG Industries, Inc.
InventorsTerence J. Hart, Ellor J. Van Buskirk, Thomas R. Hockswender
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Abstract
A composition useful as an aqueous anionic electrodepositable coating comprises a film-former of from about 67-95% by weight of a phosphated polyepoxide resin, from about 5-33% by weight of a carboxyl group-containing vinyl addition resin, and up to about 40% by weight of the film-former of a crosslinking agent.
Claims16
A coating composition comprising as a film-former:
- (A) up to about 40 percent by weight of crosslinking agent based other than the vinyl addition resin on film-former resin content;
- (B) the remainder of the film former comprising a blend of:
- (i) from about 67 to 95 percent by weight based on resin solids of the blend of an ungelled phosphated epoxy which is derived from reacting a 1,2-epoxy group of a polyepoxide resin and a phosphoric acid in a ratio of 0.1 to 1 mole of a phosphoric acid per equivalent of the epoxy group;
- and
- (ii) from about 5 to 33 percent by weight based on resin solids of the blend of a vinyl addition resin which is derived from copolymerizing ethylenically unsaturated monomers, at least one of which is a carboxyl group-containing monomer, which has an acid value of from 20 to 350.
2 more elements
An anionic electrodepositable composition comprising as a film-former:
- (A) up to about 40 percent by weight of crosslinking agent based on film-former resin content;
- (B) the remainder of the film former comprising an aqueous dispersion of a base-neutralized blend of:
- (i) from about 67 to 95 percent by weight based on resin solids of the blend of an ungelled phosphated epoxy consisting essentially of a reaction product of a polyepoxide resin and a phosphoric acid in a ratio of 0.1 to 1 mole of phosphoric acid per equivalent of the polyepoxide epoxy group;
- and
- (ii) from about 5 to 33 percent by weight based on resin solids of the blend of a vinyl addition resin which is derived from copolymerizing ethylenically unsaturated monomers, at least one of which is carboxy group-containing monomer, which has an acid value of from 20 to 350.
2 more elements
Dependencies are inferred from the claim text.