| 摘要 |
A method for producing a large size crosslinked polymer bead, which comprises dispersing a monomer phase composed essentially of a monovinyl monomer and a crosslinkable monomer in an aqueous phase containing a dispersion stabilizer and subjecting the dispersion to suspension polymerization in an oil-in-water system in the presence of a polymerization initiator, wherein: +E,crc/1/ at least one specific gravity-controlling agent having a specific gravity of more than 1.0 selected from the group consisting of water-insoluble inert organic solvents and water-insoluble linear polymers soluble in the monomer phase, is added to the monomer phase, and +E,crc/2/ if necessary, at least one specific gravity-controlling agent selected from the group consisting of water-soluble inorganic salts, is added to the aqueous phase, +E,crc/3/ to adjust the specific gravities (at 25 DEG C.) of the monomer phase and the aqueous phase in the ranges represented by the following formula (I): B-0.03<A<B+0.03(I) wherein A is the specific gravity of the monomer phase, and B is the specific gravity of the aqueous phase.
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