Anionic electrodepositable coating compositions capable of forming low gloss coatings

摘要

Disclosed herein are anionic electrodepositable coating compositions that are capable of providing cured coatings of low gloss.

主权项

1. An anionic electrodepositable coating composition comprising:
(a) an acrylic polymer that is a polymerization product of a polymerizable ethylenically unsaturated monomer composition in a dispersing medium comprising water in the presence of an anionic salt group containing polymeric dispersant that has a Mz of 200,000 to 2,000,000; and (b) an anionic salt group containing polymer that is different from the acrylic polymer and the dispersant; and (c) a curing agent; wherein the sum of the acrylic polymer and the polymeric dispersant in (a) is at least 2.0 percent by weight, based on the total weight of resin solids in the coating composition, and wherein the acrylic polymer is a polymerization product of a polymerizable ethylenically unsaturated monomer composition comprising: (a) a C1-C18 alkyl (meth)acrylate; (b) a hydroxy-functional (meth)acrylate; (c) a vinyl aromatic compound; and (d) a monomer comprising three or more ethylenically unsaturated groups per molecule.