Patent ID: 9193878
Filing Date: 2015-11-24
Classification: C08G,C08L,C09D

Abstract:
1. An improved cathodic electrocoating composition, comprising an aqueous emulsion having dispersed therein a crosslinkable component and a crosslinking agent; wherein the improvement is the incorporation of a non-water reducible anticrater agent comprising a polyesterurethane which is the reaction product of a monomer mixture consisting essentially of: (1) a polyol produced by contacting: (a) a cyclic aliphatic carboxylic acid anhydride; (b) a monofunctional epoxy compound; and (c) a monofunctional alcohol; wherein the polyester polyol has an acid number of less than 10 mg KOH/g; and (2) a diisocyanate, polyisocyanate or a combination thereof; wherein the cyclic aliphatic carboxylic acid anhydride contains one or more side chains selected from the group consisting of an alkyl side chain having in the range of from 6 to 20 carbon atoms, an alkenyl side chain having in the range of from 6 to 20 carbon atoms and a combination thereof, and wherein the anticrater agent has a solubility in water of less than 0.5 grams/liter.