Patent ID: 7319114

Claim:
A method for manufacturing a polymer particle used as a pore-forming agent for molding a porous ceramic filter comprising (a) suspending a monomer solution for polymerization in a polar solvent containing a colloidal inorganic dispersion stabilizer, the monomer solution being a mixture of at least 100 parts by weight of a monomer component for polymerization and 1 part by weight to 400 parts by weight of an organic solvent having a non-polymerization property, said organic solvent having a water solubility of 0.2% by weight or less to exhibit hydrophobicity, said monomer component comprising 10% by weight or more and 99.9% by weight or less of a hydrophilic monomer, 0.1% by weight or more and 30% by weight or less of a multifunctional monomer and 0% by weight or more and 89.9% by weight or less of other monomers; (b) polymerizing the monomer component for polymerization to prepare a polymer particle including a plurality of hollow portions, wherein the organic solvent having a non-polymerization property is contained in the interior of the hollow portions; and (c) removing the organic solvent having a non-polymerization property from the resulting polymer particle from step (b).