US 5,476,687 A · Coated metal fastener and coating composition therefor

Abstract

A process for coating a metal fastener with a coating composition that has a particular affinity for plaster materials is disclosed. The composition comprises a mixture of a copolymer of an aromatic monomer, preferably styrene, and a monomer with .alpha., .beta. unsaturation with carboxyl groups, preferably maleic anhydride, and a thermoplastic resin disposed within an organic solvent. The resin is preferably polyvinyl acetate, and the solvent can be an aromatic solvent, a ketone, a chlorohydrocarbon, or a mixture there of. The coating composition is disposed within a reservoir, and the fastener is dipped into the composition within the reservoir. The coated fastener is then subsequently dried at approximately ambient temperature.

Claims22

Dependent claims

A process for coating a metal fastener, comprising the steps of:

providing a reservoir of a coating composition that comprises a uniform mixture, of a copolymer of styrene and maleic anhydride wherein the ratio of said styrene to said maleic anyhydride within said copolymer is approximately 1:1 to 3:1, and a thermoplastic resin, uniformly dissolved within an organic solvent selected from the group consisting of aromatic solvents, ketones, chlorohydrocarbons, and mixtures thereof;
dipping a metal fastener into said reservoir containing said coating composition such that said coating composition is coated upon said metal fastener;
and
curing said coating composition coated upon metal fastener under atmospheric conditions at approximately ambient temperature.

1 more element

Dependencies are inferred from the claim text.

Coated metal fastener and coating composition therefor

Life of this patent

Coated metal fastener and coating composition therefor

Life of this patent

Abstract

Claims22