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 a first 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 a second alkaline catalyst in an amount of from 0.1 mol to 0.4 mol per mole of the total supply amount of the tetraalkoxysilane supplied per minute to obtain silica particles; and externally adding the obtained silica particles onto the surface of a resin mother particle.