Hitachi, Ltd.

Nitto-Denko Corporation

Mita Industrial Co., Ltd.

Tsunetaka Matsumoto

Akio Mukoh

Hisao Yokokura

Teruo Kitamura

Yasuhiko Kando

Yasuo Imanishi

Yasuo Fujimura

Toshiro Tokuno

Masayoshi Okubo

Noboru Masutani

Tadao Nakada

Isoji Sakai

A liquid crystal display cell, wherein orientation films are made of an organic polymer such as polyimide, polyamide, liquid crystal polymer having one or more mesogen groups in a main chain or side chain and produced by spreading an organic polymer solution on a water surface, is excellent in memory properties and contrast and generates no static electricity, no short circuit between electrodes and no breaking of electrodes.

Liquid crystal display cell and process for producing the same

Disclosed is a process in which a spherical electrophotographic toner containing a colorant and having a particle size suitable for the electrophotography is directly formed in the polymerization process for formation of a binder resin. If a reaction medium capable of dissolving a monomer but incapable of dissolving a formed polymer is used and polymerization is carried out in the presence of a radical polymerization initiator in the state where the monomer, the colorant and other additives are dissolved or dispersed in the reaction medium, an electrophotographic toner having a desired particle size is obtained. According to this process, the particle size of the colored resin is stably controlled to 1 to 30 .mu.m suitable for a toner in the polymerization process, and the particle size distribution is very sharp.

Electrophotographic toner made by polymerizing monomers in solution in

Growing community of inventors

Kobe, Japan

Tsunetaka Matsumoto