The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1976
Filed:
Feb. 24, 1975
Elaine C Siwiec, Inkster, MI (US);
Ares N Theodore, Farmington, MI (US);
Henk VAN Oene, Detroit, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
Improved powder coating compositions are disclosed which comprise a particulate mixture of (1) a qualitative difunctional copolymer of about 5 to 20 weight percent of a glycidyl ester of a monoethylenically unsaturated acid, about 2 to about 10 weight percent of a monomeric alpha-beta olefinically unsaturated amide and about 70 to about 93 weight percent of other monoethylenically unsaturated monomers consisting essentially of monofuctional, monomers selected from the group consisting of esters of a C.sub.1 - C.sub.8 monohydric alcohol and acrylic acid, esters of a C.sub.1 - C.sub.8 monohydric alcohol and methacrylic acid and C.sub.8 - C.sub.12 monovinyl hydrocarbons, (2) an anhydride crosslinking agent selected from the group consisting of (a) monomeric anhydrides of dicarboxylic acids and (b) homopolymers of monomeric anhydrides of dicarboxylic acids and present in an amount that provides about 0.3 to about 1.2 anhydride groups for each functional group on said copolymer, and (3) a hydroxy carboxylic acid having a melting point in the range of about 40.degree. to about 150.degree. C. and present in an amount such as to provide about 0.1 about 0.4 carboxyl groups per functional group on said copolymer.