Patent ID: 8461253

Claim:
A waterborne coating composition comprising: (a) acrylic copolymer resin particles comprising pendant carbonyl functionality; and (b) a crosslinking agent comprising at least two functional groups reactive with the carbonyl functionality of the acrylic copolymer; and (c) a non-reactive surfactant, wherein the acrylic copolymer resin particles have a calculated Tg of at least 40° C. and comprise the reaction product of reactants comprising: (i) at least 50 percent by weight, based on the total weight of the reactants, of hydrophobic acrylic monomers comprising: (A) at least 60 percent by weight, based on the total weight of the hydrophobic acrylic monomers, of a styrenic monomer; and (B) an alkyl(meth)acrylate ester of an alcohol wherein the alkyl portion of the alcohol is linear or branched and contains at least 4 carbon atoms, and (ii) an acrylic monomer comprising an aldehyde and/or ketone functional group; and (iii) a phosphate-functional monomer.