| 摘要 |
Provided is a toner for electrostatic image development, having both sufficient low-temperature fixability and good post-fixing separability simultaneously. The toner for electrostatic image development includes: a second amorphous polyester resin including a structural unit represented by any of the following general formulas (1) to (3); and a first amorphous polyester resin including no structural units represented by the general formulas (1) to (3).;[In the general formulas, R1, R2, R5, R9 and R10 are each independently an alkyl group having 4 to 15 carbon atoms or an alkenyl group having 4 to 15 carbon atoms, R3, R4, R7, R8 and R11 are each independently an alkylene group having 4 to 14 carbon atoms or an alkenylene group having 4 to 14 carbon atoms, R6 is a saturated or unsaturated divalent aliphatic hydrocarbon group having 4 to 15 carbon atoms, and R12 is a saturated or unsaturated trivalent aliphatic hydrocarbon group having 4 to 14 carbon atoms, and X is an aromatic ring, a carbocyclic ring or a group represented by the following formula (A).]; |
| 主权项 |
1. A toner for electrostatic image development, comprising toner particles having a wax and a binder resin containing a crystalline polyester resin, a first amorphous polyester resin and a second amorphous polyester resin, wherein
the crystalline polyester resin is obtained by polymerization of at least a diol component and a dicarboxylic acid component, the diol component includes an aliphatic diol having a straight carbon chain with 6 to 12 carbon atoms, the dicarboxylic acid component includes an aliphatic dicarboxylic acid having a straight carbon chain with 6 to 12 carbon atoms excluding carbon atoms in carboxyl groups, the second amorphous polyester resin includes a structural unit derived from any of monomers represented by the following general formulas (1) to (3), and the first amorphous polyester resin includes no structural unit derived from any of the monomers represented by the following general formulas (1) to (3):[wherein, in the general formulas (1) to (3), R1, R2, R5, R9 and R10 are each independently an alkyl group having 4 to 15 carbon atoms or an alkenyl group having 4 to 15 carbon atoms, R3, R4, R7, R8 and R11 are each independently an alkylene group having 4 to 14 carbon atoms or an alkenylene group having 4 to 14 carbon atoms, R6 is a saturated or unsaturated divalent aliphatic hydrocarbon group having 4 to 15 carbon atoms, and R12 is a saturated or unsaturated trivalent aliphatic hydrocarbon group having 4 to 14 carbon atoms, and, in the general formula (1), X is an aromatic ring, a carbocyclic ring or a group represented by the following formula (A)], |
