| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner binder resin composition that can give an electrophotographic toner excellent in low-temperature fixability, durability, and glossiness of printed matter, and an electrophotographic toner containing the toner binder resin composition.SOLUTION: Provided is a toner binder resin composition containing an amorphous polyester (AH) having a softening point of 120°C or more and 170°C or less, an amorphous polyester (AL) having a softening point of 80°C or more and less than 120°C, and a crystalline polyester (C). The amorphous polyester (AH) is a polyester obtained by polycondensation of an alcohol component (AH-al) containing an alkylene oxide adduct (AH-bp) of bisphenol A with a carboxylic acid component (AH-ac). The alcohol component (AH-al) contains 3 mol% or more and less than 20 mol% of a propylene oxide adduct of bisphenol A, having an addition molar number of propylene oxide of 3 or more. The amorphous polyester (AL) is a polyester obtained by polycondensation of an alcohol component (AL-al) containing an alkylene oxide adduct (AL-bp) of bisphenol A with a carboxylic acid component (AL-ac). The alcohol component (AL-al) contains 20 mol% or more and 70 mol% or less of a propylene oxide adduct of bisphenol A, having an addition molar number of propylene oxide of 3 or more.SELECTED DRAWING: None |
