TONER BINDER AND TONER

摘要

Provided is a toner binder having excellent charging characteristics and blocking resistance, and an increased range of fixing temperatures when used as a toner. The present invention is a toner binder containing a polyester resin (P) comprising one or more types of polyester resins obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein at least one type (P1) of (P) contains 50 to 95 mol % of a aliphatic diol (y1) having a carbon number of 2 to 4 in the alcohol component (y), and (P) satisfies expressions (1) and (2).;11.5≦SP value [(cal/cm3)1/2] of (P)≦13.0  (1);5.2≦HLB value (by Oda method) of (P)≦7.1  (2)

主权项

1. A toner binder containing a polyester resin (P) comprising one or more types of polyester resins obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein at least one type (P1) of (P) contains 50 to 95 mol % of an aliphatic diol (y1) having a carbon number of 2 to 4 in the alcohol component (y), and (P) satisfies expressions (1) and (2),
11.5≦SP value [(cal/cm3)1/2] of (P)≦13.0  (1) and 5.2≦HLB value [by Oda method] of (P)≦7.1  (2), wherein the polyester resin (P1) is one obtained by esterifying 5 mol % or more of the terminal hydroxyl groups with a monocarboxylic acid (x1), one obtained by esterifying 5 mol % or more of the terminal carboxyl groups with a monool, or one obtained by modifying 5 mol % or more of the terminal hydroxyl groups into vinyl groups.