Electrostatic image developing toner, electrostatic developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

摘要

An electrostatic image developing toner contains toner particles containing a polyester resin having a repeating unit deriving from a dicarboxylic acid and a repeating unit deriving from a rosin diol, and an external additive containing silica particles, wherein a weight average molecular weight (Mw) of the soluble matter in tetrahydrofuran of the toner is from about 60,000 to about 200,000.

主权项

1. An electrostatic image developing toner comprising:
toner particles containing a polyester resin having a repeating unit derived from a dicarboxylic acid and a repeating unit derived from a rosin diol represented by the following Formula (1): where in the Formula (1),each of R1 and R2 independently represents a hydrogen atom or a methyl group;each of L1, L2 and L3 independently represents a divalent linking group selected from the group consisting of carbonyl groups, ester groups, ether groups, sulfonyl groups, chained alkylene groups which may be substituted or unsubstituted, cyclic alkylene groups which may be substituted or unsubstituted, arylene groups which may be substituted or unsubstituted, and combinations thereof, and L1 and L2 or L1 and L3 may form a ring; andeach of A1 and A2 independently represents a rosin ester group, and an external additive containing silica particles,
wherein a weight average molecular weight (Mw) of a soluble matter in tetrahydrofuran of the toner is from about 60,000 to about 200,000.