Idemitsu Kosan Company, Limited

Minolta Camera Kabushiki Kaisha

Other

Kouichi Matono

Hiroshi Hayashi

Junji Machida

Junji Ohtani

Satoshi Asahi

Kazuo Ota

Hiroyuki Tamura

Takaaki Hikosaka

Shigeo Matsuzaki

Haruo Shikuma

Yoshihisa Terasaka

Kunitoshi Imura

The invention is &lsqb;1&rsqb; a resin composition comprising a resin obtained by polymerizing cyclopentadiene or the like and a specific styrene resin, &lsqb;2&rsqb; a resin composition comprising (a) a polystyrene-type polymer component and (b) a specific petroleum resin-based polymer component, and &lsqb;3&rsqb; a toner binder resin for development of an electrostatically charged image comprising (A) a terpene resin or the like and (B) a styrene resin and/or a polyester resin. Further, it is a toner binder resin for development of an electrostatically charged image containing these resin compositions as a main component, and a toner for development of an electrostatically charged image comprising the toner binder resin and a coloring material.

Resin composition, binder resin for toner and toner

Carrier for electrophotography, method for producing the same carrier, and developing agent for electrophotography using same

The present invention provides a polyolefinic resin-coated carrier having a rough surface and containing a core material in a quantity of 90 or more % by weight. Said resin-coated layer may contain fine particles having a charge-controlling function and/or electrically conductive fine particles as additives.

Polyolefinic resin-coated uneven carrier

The present invention provides a carrier of a two component developer for developing electrostatic latent images comprising;

Polyolefinic resin-coated carrier with irregular surface

The present invention provides fine particles comprising core particles and polyolefinic resin layers for composing an electrostatic latent image developer, characterized in that the polyolefinic resin layers are formed by polymerizing olefinic monomers on surfaces of the core particles.

Fine particles composing developer for electrophotography

Polyolefinic resin-coated uneven electrophotographic carrier particles

Growing community of inventors

Sodegaura, Japan

Kouichi Matono