Production of phosphate group-containing cation exchange resin

PURPOSE:To obtain a phosphate group-containing cation exchange resin suitable for separating and adsorbing organism-related substance, having readily adjustable exchange capacity and pore volume and high strength. CONSTITUTION:100 pts.wt. total amounts of 90-30 pts.wt. glycidylmonovinyl ester and 10-70 pts.wt. polyvinyl ester of a polyhydric alcohol are subjected to aqueous suspension polymerization in the presence of an organic solvent incompatible with water to give a crosslinked polymer particles, which are reacted with phosphoric acid to give a phosphate group-containing cation exchange resin.