| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polymer particle having an even distribution of particle size and 1-3μm of a volume average particle size by suspension polymerization. SOLUTION: A primary suspension of a monomer having 3-20μm of the volume average particle size is made by adding a styrene based monomer or a monomer mixture of the styrene based monomer and other copolymerizable monomer, a polymerization initiator soluble in the monomer or the monomer mixture, and an amphoteric surface-active agent and an inorganic dispersing agent in an aqueous medium. This method for manufacturing the polymer particle comprises forming a secondary suspension by spraying the primary suspension from a nozzle under pressure and polymerizing the secondary suspension, wherein an obtained resin particle has 1-3μm of the volume average particle size and a coefficient of variation of 25% or less. COPYRIGHT: (C)2003,JPO
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