Toner and two-component developer

摘要

Provided is a toner obtained by melting and kneading a binder resin containing a polyester resin A and a polyester resin B, a colorant, and a wax, in which in the resin A, the content of a polyhydric alcohol unit derived from an aromatic diol, the content of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin, and the content of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both of its terminals, fall within specific ranges, and in the resin B, the content of a polyhydric alcohol unit derived from an aromatic diol and the content of a polyvalent carboxylic acid unit derived from an aromatic dicarboxylic acid or a derivative thereof fall within specific ranges.

主权项

1. A toner comprising:
a binder resin; a colorant; and a wax, the toner being obtained through a step of melting and kneading the binder resin, the colorant, and the wax, wherein: the binder resin comprises:
a polyester resin A having a polyhydric alcohol unit and a polyvalent carboxylic acid unit, anda polyester resin B having a polyhydric alcohol unit and a polyvalent carboxylic acid unit; a mass ratio (polyester resin A/polyester resin B) of the polyester resin A to the polyester resin B is from 10/90 or more to 60/40 or less; the polyester resin A has a softening point of from 120° C. or more to 180° C. or less; the polyester resin A contains 90 mol % or more of a polyhydric alcohol unit derived from an aromatic diol with respect to a total number of moles of the polyhydric alcohol unit, and contains 0.1 mol % or more to 10.0 mol % or less of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin with respect thereto; the polyester resin A contains 15 mol % or more to 50 mol % or less of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both terminals of the main chain, with respect to a total number of moles of the polyvalent carboxylic acid unit; the polyester resin B has a softening point of from 80° C. or more to 100° C. or less; the polyester resin B contains 90 mol % or more of a polyhydric alcohol unit derived from an aromatic diol with respect to a total number of moles of the polyhydric alcohol unit; the polyester resin B contains 90 mol % or more of a polyvalent carboxylic acid unit derived from one of an aromatic dicarboxylic acid and a derivative thereof with respect to a total number of moles of the polyvalent carboxylic acid unit; and the polyester resin B contains 0.1 mol % or more to 10.0 mol % or less of a polyvalent carboxylic acid unit derived from one of an aliphatic dicarboxylic acid and a derivative thereof with respect to the total number of moles of the polyvalent carboxylic acid unit.