Patent ID: 8236903

Claim:
A process of producing an aqueous film-forming coating composition comprising: (a) charging a reaction zone with: 1) an aqueous film-forming polymer dispersion prepared from more than one unsaturated monomer, including from about 4 to about 90 weight percent of acid-functional monomer(s), said polymer having pendant acid functionality and a calculated glass transition temperature of less than the decomposition temperature of said polymer, and 2) less than about a stoichiometric equivalent amount, based on acid functionality of said polymer, of a water insoluble transition metal compound and having an average particle size sufficiently small to react with the polymer at a temperature approximately at or below the calculated glass transition temperature of the polymer; (b) maintaining the reaction zone at a temperature below the calculated glass transition temperature for the polymer for a time sufficient to react said acid and metal to produce a film-forming composition, wherein the transition metal compound has an average particle size less than 300 nm.