ELECTROSTATIC IMAGE DEVELOPING TONER

摘要

The object of the present invention is to provide an electrostatic image developing toner excellent in providing high image quality and excellent in low-temperature fixation performance and environmental stability. The present invention is an electrostatic image developing toner having a toner base particle containing at least a binder resin and a colorant, and an external additive, wherein the toner base particle has a core-shell structure having a core particle and a shell layer, the toner base particle has a resin coating layer of a water-soluble resin on the surface of the core particle, and has the shell layer on the resin coating layer.

主权项

1. An electrostatic image developing toner comprising a toner base particle containing at least a binder resin and a colorant, and an external additive, wherein:
the toner base particle has a core-shell structure having a core particle and a shell layer, the toner base particle has a resin coating layer of a water-soluble resin on the surface of the core particle, and has the shell layer on the resin coating layer, and the shell layer is formed of a particle comprising a resin as a main ingredient, and when a glass transition temperature of a polymer primary particle to constitute the core particle is referred to as Tg1, and a glass transition temperature of the particle to constitute the shell layer is referred to as Tg2, the Tg1 and Tg2 satisfy the following relationship:
25° C.≦Tg1≦45° C.55° C.≦Tg2Tg2−Tg1≧20