Patent ID: 7244781

Claim:
A composite composition comprising (a) polymeric nanoparticles (“PNPs”) comprising, as copolymerized units, from 1% to 50%, by weight, based on the weight of said nanoparticles, of at least one multiethylenically unsaturated first monomer; from 2% to 75%, by weight based on the weight of said nanoparticles, of at least one ethylenically unsaturated second monomer, said second monomer bearing at least one group selected from the group consisting of hydroxy; silyl; polyalkylene oxide; quaternary ammonium; quaternary phosphonium; amines, amine N-oxides, carboxylic acids, sulfur acids, phosphorous acids, and salts thereof; and from 0% to 97%, by weight based on the weight of said nanoparticles, of at least one monoethylenically unsaturated third monomer, said nanoparticles having a mean diameter from 1 nanometer to 50 nanometers; and (b) clay nanoparticles (“CNPs”).