Patent ID: 8426176

Claim:
A microcarrier formed via water-in-oil emulsion copolymerization, comprising: (i) an uncharged hydrophilic unsaturated monomer having a hydroxyl group selected from a hydrophilic (meth)acrylate monomer having a hydroxyl group or a hydrophilic (meth)acrylamide monomer having a hydroxyl group; (ii) a hydrophilic carboxylic acid containing unsaturated monomer selected from a carboxylic acid containing (meth)acrylate monomer or a carboxylic acid containing (meth)acrylamide monomer, and (iii) a hydrophilic multifunctional unsaturated monomer selected from a hydrophilic multifunctional (meth)acrylate monomer or a hydrophilic multifunctional (meth)acrylamide monomer wherein the microcarrier is formed via water-in-oil emulsion copolymerization of monomers (i), (ii) and (iii).