A toner binder comprising a polyester, the end of which is partially esterified with a monocarboxylic acid and/or a monohydric alcohol, the polyhydric alcohol component of which comprises a C3 alkylene glycol (a21) and an aromatic-ring-bearing diol (a22) at an (a21)/(a22) molar ratio of 5/95 to 70/30, and which has an ester group concentration of 16 to 30wt% and satisfies a specific relationship between the ester group concentration and the hydroxy value. The toner binder combines low-temperature fixability and storage stability under high-temperature conditions or heat-temperature and -humidity conditions, and exhibits excellent durability.
一种由聚酯组成的墨粉粘合剂,其末端部分与一元
羧酸和/或一元醇酯化,其中的多元醇成分包括 C3 烷二醇(a21)和含芳香环的二元醇(a22),(a21)/(a22)摩尔比为 5/95 至 70/30,酯基浓度为 16 至 30wt%,并满足酯基浓度与羟值之间的特定关系。这种调色剂粘合剂兼具低温固定性和高温条件下或高温高湿条件下的储存稳定性,并具有出色的耐久性。