There is provided a toner binder containing a polyester resin (P) composed of two or more polyester resins that are each obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y). The alcohol component (y) of at least one polyester resin (P1) constituting the polyester resin (P) comprises 30 to 100 molar % of an adduct (y1) of bisphenol A with 2 to 4 ethylene oxide molecules. The alcohol component (y) of at least one other polyester resin (P2) constituting the polyester resin (P) comprises 50 to 95 molar % of an aliphatic diol (y2) having 2 to 4 carbon atoms. The (P2) is other than the (P1), and the polyester resin (P) satisfies relationships as follows. 11.5≦SP value [(cal/cm
3
)
1/2
] of (P)≦13.0; and 5.2≦HLB value (according to the Oda method) of (P)≦7.1.
提供了一种调色剂粘合剂,其中包含由两种或多种聚酯
树脂(P)组成的聚酯
树脂,每种聚酯
树脂均由
羧酸组分(x)和醇组分(y)的缩聚反应得到。至少一种构成聚酯
树脂(P1)的醇组分(y)包括
双酚A与2至4个乙氧基分子的加合物(y1),占聚酯
树脂(P)的30至100摩尔%。至少另一种构成聚酯
树脂(P2)的醇组分(y)包括具有2至4个碳原子的脂肪族二元醇(y2),占聚酯
树脂(P)的50至95摩尔%。聚酯
树脂(P2)不同于聚酯
树脂(P1),且聚酯
树脂(P)满足以下关系:11.5≦
SP值([cal/cm3]1/2)≦13.0;5.2≦HLB值(根据小田方法)≦7.1。