Electrodeposition of aqueous dispersions of amine functional urethane copolymers
AssigneeDeSoto, Inc.
InventorsKazys Sekmakas, Raj Shah
Life of this patent
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Abstract
Amine functional urethane copolymers dispersible in water with the aid of a solubilizing acid are provided by copolymerizing (A) 5-75% by weight of an ethylenically unsaturated urethane amine free of epoxy groups and formed by reacting an epoxy-functional urethane in which the urethane groups are ethylenically unsaturated with a monosecondary amine; and (B) the balance consisting essentially of copolymerizable monoethylenically unsaturated monomers. These monomers preferably include amine-functional monomers to further increase the amine functionality.
Claims23
An amine functional urethane copolymer dispersible in water with the aid of a solubilizing acid and which is a copolymer of:
- A. 5-75% by weight of an ethylenically unsaturated urethane amine free of epoxy groups and formed by reacting a 1,2-epoxy functional urethane in which the urethane groups are ethylenically unsaturated with a monosecondary amine;
- and
- B. the balance consisting essentially of copolymerizable monoethylenically unsaturated monomers.
An amine functional urethane copolymer dispersible in water with the aid of a solubilizing acid and which is a copolymer of:
- A. 20-60% by weight of an ethylenically unsaturated urethane amine free of epoxy groups and formed by reacting a monosecondary amine with a polyepoxide reaction product of an hydroxy functional polyepoxide which is a diglycidyl ether of a bisphenol having a 1,2-epoxy equivalency of from 1.4 to 2.0, and a molecular weight of from about 400 to about 4000, with an ethylenically unsaturated isocyanate terminated urethane, said ethylenically unsaturated isocyanate terminated urethane being the reaction product of from 1.8-2.4 isocyanate equivalents of organic diisocyanate with one equivalent of ethylenically unsaturated fatty alcohol, there being at least about 0.9 mol up to about 2.0 mol of unsaturated urethane per mol of polyepoxide;
- and
- B. the balance consisting essentially of copolymerizable monoethylenically unsaturated monomers including from 2-20% by weight of the copolymer of monoethylenically unsaturated tertiary amine.
Dependencies are inferred from the claim text.