Hitachi Chemical Company, Ltd.

Hitachi, Ltd.

Ikutoshi Shibuya

Atsushi Kakuta

Shigeo Tachiki

Makoto Fujikura

Isamu Moribe

Yuugo Kumagai

A toner comprising a vinyl polymer having a hydroxyl number of 50 to 350 and a glass transition point of 35.degree. to 100.degree. C., obtained from one or more monomers having a secondary hydroxyl group and, if necessary, one or more vinyl monomers copolymerizable with the vinyl monomer having a secondary hydroxyl group, is excellent in resistance to adhesion to non-rigid polyvinyl chloride and resistance to blocking under high humidity.

Toner for developing electrostatic image comprising vinyl polymer having

An electrophotographic plate comprising an electroconductive layer, a charge generating layer and a charge transport layer and containing a silane coupling agent at least in the charge generating layer or in the charge transport layer, or at the interface of the charge generating layer and the charge transport layer shows small dark decay, little light fatigue and high sensitivity.

Electrophotographic plate having a charge generating layer containing an

Growing community of inventors

Hitachi, Japan

Ikutoshi Shibuya