METHOD FOR PRODUCING POSITIVELY CHARGEABLE ACRYLIC POLYMER PARTICLE AND POSITIVELY CHARGEABLE ACRYLIC POLYMER PARTICLE OBTAINED BY THE METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a method for producing positively chargeable acrylic polymer particles, and to provide the positively chargeable acrylic polymer particles obtained by the method. PSOLUTION: The method for producing positively chargeable acrylic polymer particles includes a process for absorbing a polymerizable monomer in seed particles in the presence of the seed particles and a cationic surfactant in an aqueous medium, and performing seed emulsion polymerization to produce the acrylic polymer particles. In the method, the seed particles are vinyl-based polymer particles, the polymerizable monomer is a mixture comprising 20-100 wt.% of a (meth)acryl ester-based monomer and 0-80 wt.% of a vinyl-based polymerizable monomer copolymerizable with the (meth)acryl ester-based monomer, the number of carbon atoms in a substituent of the ester portion of the (meth)acryl ester-based monomer is 4-10, and the passing rate of the acrylic polymer particles through a sieve having a mesh opening of 45 μm is 80-99%. PCOPYRIGHT: (C)2011,JPO&INPIT