Patent ID: 9701833
Date: 2017-07-11
CPC Classifications: C08G,C08L,G03G

Claim:
1. A toner binder which contains a polyester resin (P) comprising a polyester resin (P1) and a polyester resin (P2) which is different from the polyester resin (P1), each of the polyester resins (P1) and (P2) being obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein the alcohol component (y) of the polyester resin (P1) contains 30 to 100 molar % of an adduct (y1) of bisphenol A with 2 to 4 ethylene oxide molecules, the alcohol component (y) of the polyester resin (P2) contains 50 to 95 molar % of an aliphatic diol (y2) having 2 to 4 carbon atoms, the polyester resin (P) satisfies the following relationships (1) and (2): at least one of the polyester resins (P1) and (P2) is a polyester resin in which 5 molar % or more of terminal hydroxyl groups are esterified with a monocarboxylic acid (x1), a polyester resin in which 5 molar % or more of terminal carboxyl groups are esterified with a monool, or a polyester resin in which 5 molar % or more of terminal hydroxyl groups are modified to vinyl groups.