Mita Industrial Co., Ltd.

Terumichi Asano

Yoshitake Shimizu

Norio Kubo

Masatomi Funato

Seijiro Ishimaru

Kazuya Nagao

The invention provides toner for a two-component type developer containing toner particles including a binder resin and magnetic powder dispersed in the binder resin. The binder resin in the toner is prepared from a composition including at least one of (1) a polymer having an anionic group and a wax grafted portion and (2) a mixture of a polymer having an anionic group and a polymer having a wax grafted portion. The magnetic powder is contained in the toner particles at a proportion ranging between 0.1 and 5 parts by weight per 100 parts by weight of the binder resin.

Toner for a two-component type developer

The invention provides toner for a two-component type developer containing toner particles including a binder resin and magnetic powder dispersed in the binder resin. The binder resin in the toner is made of a composition including a low molecular weight polymer and a high molecular weight polymer both having an anionic group. The magnetic powder is contained in the toner particles in the range of 0.1 to 5 parts by weight per 100 parts by weight of the binder resin.

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Osaka, Japan

Terumichi Asano