RESIN PARTICLE AND METHOD FOR PRODUCING THE SAME

摘要

A resin particle having: a resin mother particle; and silica particles external added onto the surface of the resin mother particle, wherein a primary particles of the silica particles which have a volume average particle diameter of from 100 nm to 500 nm, a particle size distribution index of from 1.40 to 1.80 and an average circularity of from 0.5 to 0.85 has a regression line expressed by the following expression (1) with respect to the circularity and the volume average particle diameter (nm):;Circularity=α×(Volume average particle diameter)/1000+β  (1);wherein α is from −2.5 to −0.9, and β is from 0.8 to 1.2.

主权项

1. A method for producing a resin particle comprising:
preparing an alkaline catalyst solution containing an alkaline catalyst in a concentration of from 0.6 mol/L to 0.85 mol/L in an alcohol-containing solvent; supplying a tetraalkoxysilane in a supply amount of from 0.006 mol/(mol·min) to 0.009 mol/(mol·min) relative to the alcohol into the alkaline catalyst solution and also supplying an alkaline catalyst in an amount of from 0.1 mol to 0.4 mol per mole of the total supply amount of the tetraalkoxysilane to be supplied per minute to obtain a silica particles; and allowing the obtained silica particles to be externally added onto the surface of a resin mother particle.