Patent ID: 6022659
Filing Date: 2000-02-08
Classification: G03G

Abstract:
A yellow toner for developing electrostatic images, comprising: yellow toner particles containing a binder resin and a yellow colorant,wherein the yellow toner has a storage modulus G'.sub.180 at 180.degree. C. and a minimum storage modulus G'.sub.min(120-170) in a temperature range of 120-170.degree. C. giving a ratio [G'.sub.180 /G'.sub.min(120-170) ] of 2.0-8.0;the binder resin comprises a polyester resin having a glass transition temperature of 50-65.degree. C. and an acid value of 2.0-25.0 mgKOH/g;the yellow toner comprises a compound represented by Formula (1) below:Formula (1): ##STR7## the yellow colorant comprises primary particles giving a length/breadth ratio of at most 1.5; andthe yellow colorant is dispersed in the toner particles as independent particles (including primary particles and secondary particles) providing a number-average particle size of 0.1-0.7 .mu.m.