| 摘要 |
The toner has a toner particle that contains a binder resin, a colorant, a release agent, and a crystalline polyester, wherein the release agent contains an ester wax, and the peak top temperature of the maximum endothermic peak of the ester wax as measured with a differential scanning calorimeter is from 65° C. to 85° C., the ester wax satisfies specific conditions and the crystalline polyester satisfies specific conditions, the toner contains from 3.0 parts by mass to 20.0 parts by mass of the crystalline polyester per 100 parts by mass of the binder resin, and the mass ratio of the ester wax to crystalline polyester is from 25/75 to 75/25. |
| 主权项 |
1. A toner comprising a toner particle containing:
a binder resin; a colorant; a release agent; and a crystalline polyester, wherein the release agent comprises an ester wax, the ester wax has a peak top temperature of a maximum endothermic peak of at least 65° C. and not more than 85° C., in a measurement of the ester wax with a differential scanning calorimeter, the ester wax satisfies the following condition (i) or (ii): (i) the ester wax comprises an ester compound, a partial structure derived from an alcohol component of the ester compound comprises a partial structure represented by the following formula (1), and the content of the ester compound based on the ester wax is at least 90% by mass, (ii) the ester wax comprises an ester compound, a partial structure derived from a carboxylic acid component of the ester compound comprises a partial structure represented by the following formula (2), and the content of the ester compound based on the ester wax is at least 90% by mass, the crystalline polyester satisfies the following condition (iii) or (iv): (iii) the crystalline polyester has a partial structure represented by the following formula (3), and the content of the partial structure represented by formula (3) is at least 90 mol % based on a total number of moles of a partial structure derived from a diol component in the crystalline polyester, (iv) the crystalline polyester has a partial structure represented by the following formula (4), and the content of the partial structure represented by formula (4) is at least 90 mol % based on a total number of moles of a partial structure derived from a dicarboxylic acid component in the crystalline polyester, the toner contains at least 3.0 parts by mass and not more than 20.0 parts by mass of the crystalline polyester per 100 parts by mass of the binder resin, and a mass ratio of the ester wax to crystalline polyester (ester wax/crystalline polyester) is at least 25/75 and not more than 75/25,
—O—CxH2x—O— or CxH2x+1—O— (1) wherein in formula (1), x represents an integer from 6 to 12, wherein in formula (2), y represents an integer from 4 to 10,
—O—CxH2x—O— (3) wherein in formula (3), x represents an integer from 6 to 12, wherein in formula (4), y represents an integer from 4 to 10. |
