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US 4,116,900 AGranted
Cathodic electrocoating resin system from polyepoxide, polyamine, and monoepoxide
AssigneeCelanese Polymer Specialties Company
InventorWilliam J. Belanger
Life of this patent
Estimating the term…
Abstract
Polyepoxide resins are adducted with polyamines which are further reacted with a monoepoxide or a monocarboxylic acid. When salted with an acid, the resinous adducts are water soluble or water dispersible. The resin solutions or dispersions are particularly useful in cathodic electrodeposition processes for prime coating metal objects.
Claims9
A resinous composition comprising the reaction product of
- (A) a polyepoxide resin derived from a dihydric phenol and an epihalohydrin, said polyepoxide resin having a 1,2-epoxide equivalent weight of about 400 to about 4000;
- and
- (B) a polyamine having at least 2 amine nitrogen atoms per molecule, at least 3 amine hydrogen atoms per molecule and no other groups reactive with epoxide groups;
- followed by reaction with
- (C) a monoepoxide which contains one 1,2-epoxide group and no other groups reactive with amine groups, said monoepoxide having about 8 to 24 carbon atoms per molecule and being selected from the group consisting of epoxidized unsaturated hydrocarbons, epoxidized monoalcohol esters of unsaturated fatty acids, monoglycidyl ethers of monohydric alcohols and monoglycidyl esters of monocarboxylic acids,
- wherein about 1 mol of (B) is reacted with each epoxide equivalent of (A), about 2 to about 6 mols of (C) are reacted per each mol of (A) and
- wherein said reaction product has a weight per active nitrogen of about 200 to about 600.
4 more elements
Dependencies are inferred from the claim text.