Process for producing toner for developing electrostatic image

A process for producing a toner for developing electrostatic image comprising an agglomerate step wherein a dispersion liquid containing at least primary polymer particles and colorant particles is stirred in a stirring tank to agglomerate the particles to thereby obtain agglomerate of the particles and an aging step wherein the resultant agglomerate of the particles is kept at a temperature higher than the glass transition temperature of the primary polymer particles by 10° C. or more for a predetermined period of time to thereby fuse the particles, wherein the concentration of solid content C1 in the agglomerate step is 10 to 40% by weight, and the concentration of the solid content C2 in the aging step is in the range of 0.3C1≦C2≦0.8C1, wherein a particulate resin is added to the dispersion liquid containing the agglomerate of the particles before or during the aging step to thereby adhere or fix the particulate resin to the agglomerate of the particles.

A process for producing a toner for developing electrostatic image comprising an agglomerate step wherein a dispersion liquid containing at least primary polymer particles and colorant particles is stirred in a stirring tank to agglomerate the particles to thereby obtain agglomerate of the particles and an aging step wherein the resultant agglomerate of the particles is kept at a temperature higher than the glass transition temperature of the primary polymer particles by 10° C. or more for a predetermined period of time to thereby fuse the particles, wherein the concentration of solid content C1 in the agglomerate step is 10 to 40% by weight, and the concentration of the solid content C2 in the aging step is in the range of 0.3C1≦C2≦0.8C1, wherein the primary polymer particles are those obtained by emulsion polymerization using a particulate wax as a seed, and wherein the toner contains residual monomers in an amount of 100 ppm or less.

A process for producing a toner for developing electrostatic image comprising an agglomerate step wherein a dispersion liquid containing at least primary polymer particles and colorant particles is stirred in a stirring tank to agglomerate the particles to thereby obtain agglomerate of the particles and an aging step wherein the resultant agglomerate of the particles is kept at a temperature higher than the glass transition temperature of the primary polymer particles by 10° C. or more for a predetermined period of time to thereby fuse the particles, wherein the concentration of solid content C1 in the agglomerate step is 10 to 40% by weight, and the concentration of the solid content C2 in the aging step is in the range of 0.3C1≦C2≦0.8C1, wherein the toner has a storage modulus G′ and a loss modulus G″ at 200° C. of 400 Pa or more with respect to dynamic viscoelasticity.