Patent ID: 6190816
Filing Date: 2001-02-20
Classification: G03G

Abstract:
A toner resin composition comprising:a vinyl-type copolymer, which has styrene-type monomers and (meth)acrylic ester-type monomers as the main ingredients, having at least one peak value on both the range of 5,000-20,000 and the range of 500,000 or higher in the molecular weight distribution curve measured by gel permeation chromatography;2-10 weight parts of a low-melting-point crystalline compound, for 100 weight parts of said vinyl-type copolymer; and0.5-5 weight parts of a block copolymer of polystyrene and polyolefin for 100 weight parts of said vinyl-type copolymer,wherein the average particle area of said toner resin composition is 30 .mu.m.sup.2 or less in any 25 .mu.m.times.25 .mu.m area when transmission electron microscopy is used to observe said low-melting-point crystalline compound which forms domains in the domain-matrix structure formed by said vinyl-type copolymer and the low-melting-point crystalline compound.