Patent ID: 8114560
Filing Date: 2012-02-14
Classification: G03G

Abstract:
1. A toner comprising: a binder resin, a releasing agent, and a colorant, wherein the binder resin comprises at least a polyester resin (A) having a softening point Tm (A) of 120° C. to 160° C., a polyester resin (B) having a softening point Tm (B) of 80° C. or more and less than 120° C. and a composite resin (C) containing a condensation polymerization monomer and an addition polymerization monomer, at least any one of the polyester resins (A) and (B) is a polyester resin prepared by condensation-polymerizing an alcohol component composed of aliphatic alcohol with a carboxylic acid component, and 65 mole % or more of the alcohol component is 1,2-propanediol, wherein 90 mole % or more of the alcohol component is the aliphatic alcohol, wherein the condensation polymerization monomer to be used in the composite resin (C) is at least one member selected from the group consisting of: polyester resin units formed from a polyhydric alcohol and a polyhydric carboxylic acid; polyamide resin units formed from a polyhydric carboxylic acid and an amine or an amino acid; and polyester-polyamide resin units, and wherein the addition polymerization monomer to be used in the composite resin (C) is at least one member selected from vinyl monomers.