Patent ID: 7153890

Claim:
A method of producing a porous resin bead, which comprises suspension copolymerizing a styrene monomer, an acyloxystyrene monomer and a divinylbenzene monomer using an organic solvent and water to give a styrene-acyloxystyrene-divinylbenzene copolymer,and hydrolyzing the obtained copolymer to convert the styrene-acyloxystyrene-divinylbenzene copolymer to a styrene-hydroxystyrene-divinylbenzene copolymer, wherein the styrene monomer comprises styrene, the acyloxystyrene monomer comprises p-acetoxystyrene, the divinylbenzene monomer comprises divinylbenzene, in the suspension copolymerization, the amount of styrene to the total amount of styrene, p-acetoxystyrene and divinylbenzene is 60–95 wt %, in the suspension copolymerization the amount of the acyloxystyrene monomer to the total amount of the styrene monomer, the acyloxystyrene monomer, and the divinylbenzene monomer is 0.2–20 wt %, and in the suspension copolymerization, the organic solvent comprise hydrocarbon and alcohol.