Toray Industries, Inc.

Kazuo Kitamura

Mitsuru Suezawa

Satoshi Okawa

The invention relates to a liquid crystal orientation film having a specific polymer, the main chain of the polymer formed of urea bonds and imide bonds, and a liquid crystal display element incorporating the film. The liquid crystal orientation film does not require high temperature heat treatment when prepared, allowing treatment below about 150.degree. C. Hence, the production of a liquid crystal display element using the liquid crystal orientation film is simplified. Furthermore, other element materials are protected, and the substrate used can be a plastic substrate lower in heat resistance than glass. Moreover, the liquid crystal orientation film is excellent in such properties as liquid crystal orienting capability, heat resistance, transparency, strength and adhesion to the substrate, and has an especially large and stable pre-tilt angle. Therefore, the liquid crystal element using the liquid crystal orientation film can be used for many applications and is especially advantageous as a liquid crystal display element of an STN system.

Liquid crystal orientation film and a liquid crystal display element

A coating composition comprising (a) a diorganopolysiloxane having 1 to 3 functional groups on each of both ends, (b) a diorganopolysiloxane having no functional group or having 1 to 3 functional groups on one end, and (c) a cross-linking agent having two or more functional groups capable of undergoing condensation or addition reaction with the functional groups is coated together with a solvent onto a printing plate or a printing part. The coating composition is ink-repellent and prevents an area to which ink is not to be applied from staining with ink by being coated onto the area.

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Ohtsu, Japan

Kazuo Kitamura