Mitsubishi Chemical Corporation

Usei Jo

Tomohiro Yamazaki

Noriaki Takahashi

Masahiro Nukui

Hideko Akai

Maki Saito

Kazunori Maruyama

Tetsuharu Yuge

Takashi Kokubo

Masami Tsurumori

The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount.

Electrostatic image developing toner

The present invention provides a process for the preparation of a novel toner satisfying a high resolution, a low temperature fixability and a high offset resistance at a low cost. A novel toner for the development of an electrostatic image is provided comprising an agglomerate of particles containing at least primary polymer particles, wherein said primary polymer particles substantially comprise a wax encapsulated therein.

Toner for the development of electrostatic image and process for the preparation thereof

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Niigata, Japan

Usei Jo