Patent ID: 8962230
Filing Date: 2015-02-24
Classification: G03G

Abstract:
1. An electrostatic-image developing toner comprising: an amorphous polyester resin that has repeating units having a backbone derived from dehydroabietic acid in a main chain thereof and that has a weight average molecular weight of about 30,000 to about 80,000; and at least one of a crystalline polyester resin containing a dicarboxylic acid (C10) and a diol (C9) as polymerization components and a crystalline polyester resin containing a dicarboxylic acid (C9) and a diol (C10) as polymerization components, the dicarboxylic acid (C10) being a dicarboxylic acid or a derivative thereof containing a first carbonyl group and a second carbonyl group coupled together by consecutive carbon atoms, wherein the minimum number of consecutive carbon atoms from the carbon atom directly attached to the first carbonyl group to the carbon atom directly attached to the second carbonyl group is 6 to 10, the dicarboxylic acid (C9) being a dicarboxylic acid or a derivative thereof containing a first carbonyl group and a second carbonyl group coupled together by consecutive carbon atoms, wherein the minimum number of consecutive carbon atoms from the carbon atom directly attached to the first carbonyl group to the carbon atom directly attached to the second carbonyl group is 6 to 9, the diol (C10) being a diol containing a first hydroxy group and a second hydroxy group coupled together by consecutive carbon atoms, wherein the minimum number of consecutive carbon atoms from the carbon atom directly attached to the first hydroxy group to the carbon atom directly attached to the second hydroxy group is 6 to 10, and the diol (C9) being a diol containing a first hydroxy group and a second hydroxy group coupled together by consecutive carbon atoms, wherein the minimum number of consecutive carbon atoms from the carbon atom directly attached to the first hydroxy group to the carbon atom directly attached to the second hydroxy group is 6 to 9, wherein the amorphous polyester resin is a polycondensate of a dehydroabietic acid derivative and other polycarboxylic acids with a diol, and the proportion of the dehydroabietic acid derivative in all carboxylic acids is 5 to 20 mol %, and wherein the dehydroabietic acid derivative is at least one selected from the group consisting of compounds represented by the following formulae DHA (1) and DHA (2):