| abstract |
An object of the present invention is to provide a toner binder used for a toner having excellent pulverizability, image strength, heat storage stability, charge stability, glossiness and durability while maintaining low temperature fixability and hot offset resistance. And. The toner binder of the present invention is a toner binder containing an amorphous resin (A) and a crystalline vinyl resin (B), and is a weight ratio of (A) to (B) [(A) / (B). )] Is 81/19 to 97/3, the peak top temperature (Tm) of the heat absorption peak derived from the crystalline vinyl resin (B) of the toner binder is 40 to 100 ° C., and the crystalline vinyl resin (B) The half price range of the derived heat absorption peak is 6 ° C. or less, the acid value of the crystalline vinyl resin (B) is 60 mgKOH / g or less, and the following relational expression (1) is further satisfied. Relational expression (1): 3 ° C. ≤ Tfb (A) -Tfb (C) ≤ 30 ° C. |