Amine acid salt-containing polymers for cationic electrodeposition
First Claim
Patent Images
1. A cationic, water-dispersible resin, electrodepositable on the cathode, comprising the ungelled reaction product of:
- (A) a polyepoxide having a molecular weight of at least 350,(B) a secondary amine,(C) a polyester polyol containing two alcoholic primary hydroxyl groups, said polyester polyol being selected from the class consisting of polylactones and polyesters prepared by the polyesterification of organic polycarboxylic acids or functional derivatives thereof with organic polyols;
the equivalent ratio of polyester polyol to polyepoxide being about 0.1 to about 0.8;
1;
said reaction product being dispersible in water with the aid of acid to provide cationic groups in the resin.
0 Assignments
0 Petitions
Accused Products
Abstract
Novel, chain-extended adducts formed from reacting high molecular weight polyepoxides and polyester polyols containing at least two alcoholic, primary hydroxyls per molecule are disclosed. The chain-extended polyepoxides are adducted with a secondary amine and made dispersible in water with acid. The water-dispersed resins can be applied to a wide variety of substrates by cationic electrodeposition. When compared to resins which are not chain extended, the resins of the invention have higher rupture voltages, improved film-forming properties and deposit as films with improved flexibility.
133 Citations
16 Claims
-
1. A cationic, water-dispersible resin, electrodepositable on the cathode, comprising the ungelled reaction product of:
-
(A) a polyepoxide having a molecular weight of at least 350, (B) a secondary amine, (C) a polyester polyol containing two alcoholic primary hydroxyl groups, said polyester polyol being selected from the class consisting of polylactones and polyesters prepared by the polyesterification of organic polycarboxylic acids or functional derivatives thereof with organic polyols;
the equivalent ratio of polyester polyol to polyepoxide being about 0.1 to about 0.8;
1;said reaction product being dispersible in water with the aid of acid to provide cationic groups in the resin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification