RESIN PARTICLES

摘要

: The present invention is directed to a process for preparing polymer particles suitable for use as electrophotographic toner. The substantially spherical resin particles have a weight average particle size of 1 to 30 micron meters and contain as main components, a carbon atom, a silicon atom of 1 X 10-1 to 7 % by weight and/or a fluorine atom of 1 X 10-2 to 2 % by weight. The particles are prepared by polymerizing a polymerizable monomer in an organic solvent having a higher solubility parameter (SP value) than the resultant polymer by at least 1.0 in the presence of a dispersion stabilizer which is soluble in said organic solvent and which has a dialkylsiloxane bond and/or a fluorine atom, and then removing said organic solvent.