Patent ID: 6858299

Claim:
A process for preparing polymeric nanoparticles comprising adding a solvent and reactants to a vessel and reacting said reactants to form crosslinked polymeric nanoparticles; wherein the reactants comprise monomers selected from alkyl (meth)acrylates, alicyclic (meth)acrylates, (meth)acrylamides, vinyl acetates, alkenyl (meth)acrylates, aryl (meth)acrylates, alkylaryl (meth)acrylates, amine containing (meth)acrylates, phosphorous containing (meth)acrylates, sulfur containing (meth)acrylates, vinyl aromatic monomers, (meth)acrylic acid, substituted ethylene monomers and combinations thereof; wherein the reactants also comprise a crosslinker; wherein said polymeric nanoparticles have a mean particle diameter of from 1 to 50 nm wherein the process is emulsion free and wherein the process yields a solids level of polymeric nanoparticles equal to or greater than 45 weight %.