Nissan Chemical Industries Limited

Other

Hideyuki Endo

Toyohiko Abe

Takayasu Nihira

Yoshio Miyamoto

Hiroyoshi Fukuro

Go Ono

Yu Nagase

Tomohisa Yamada

Hideyuki Nawata

Kio Mizuno

Yukihiro Miyama

Eiich Akiyama

Tetsuya Imamura

Nobukatsu Nemoto

A polyimide-containing liquid crystal alignment treating agent having a structure of the formula (I) incorporated therein, wherein Q is a single bond or a divalent organic group, Rto Rrepresent aromatic groups, and Rto Rmay be the same as, or different from, one another.

Liquid crystal orientation agents and liquid crystal display device with the use thereof

A liquid crystal alignment treating agent for optical alignment treatment, whereby it is possible to obtain a liquid crystal alignment film which presents a high and stable tilt angle of liquid crystal and which is excellent in an accumulated charge property by a DC voltage, is provided. A liquid crystal alignment treating agent which comprises, as resin components, a polyimide precursor or a polyimide obtained by cyclodehydration of the polyimide precursor, and an acryl polymer having repeating units represented by the formula (II): (wherein Rrepresents a hydrogen atom, a methyl group or a halogen atom, Rrepresents an alkyl group having at least 8 carbon atoms, and k represents a positive represented by the formula (III): (wherein Rand Reach independently represents a hydrogen atom, a methyl group or a halogen atom, Rrepresents an alkyl group having at least 8 carbon atoms, Rrepresents an organic group having an epoxy group, and k and j each represents a positive integer), wherein the acryl polymer having the repeating units represented by the formula (II) or the formula (III) is from 0.01 to 30 wt % based on the whole resin components.

Liquid crystal aligning agent, liquid crystal aligning films, and liquid crystal display devices

A liquid crystal alignment treating agent containing a polyamic acid which is represented by the following formula (I) and exhibits a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methyl-2-pyrrolidone at 30&#xb0; C. at a concentration of 0.5 g/dl) or a polyimide obtained by cyclodehydration thereof: wherein Rrepresents a tetravalent organic group, at least 20 mol % of which has a fused alicyclic structure composed of two to five rings, and all of the carbonyl groups are directly bonded to the alicyclic structure and that any two carbonyl groups are not bonded to adjacent carbon atoms of the alicyclic structure; Ris a bivalent organic group, from 20 to 100 mol % of which has in the side-chain structure at least one structural unit selected from the group consisting of Clong-chain alkyl, Cfluoroalkyl, alicyclic structures and aromatic ring structures; and L is a positive integer.

Liquid crystal aligning agent for vertical alignment, alignment layer for liquid crystal, and liquid crystal displays made by using the same

A liquid crystal alignment agent comprising a polymer having a specific unit structure, and a method for alignment of liquid crystal molecules by light irradiation without any rubbing treatment, provides liquid crystal alignment films with higher heat sensitivity, heat stability and light resistance.

Liquid crystal alignment agent and liquid crystal device using the liquid crystal alignment and method for alignment of liquid crystal molecules

A diaminobenzene derivative of the formula (I): ##STR1## wherein each of P and Q which may be the same or different from each other, is a single bond, or a bivalent organic group selected from the group consisting of --O--, --COO-- and --CONH--, R.sub.1 is a C.sub.2-22 straight chain alkylene group, and R.sub.2 is a cyclic group selected from the group consisting of an aromatic ring, an aliphatic ring, a heterocyclic ring and substituted forms of such rings.

Diaminobenzene derivatives and polyimides prepared therefrom

A liquid crystal alignment film made of a polyimide which has, on its side chain, a benzene or biphenyl ring substituted by a monovalent substituent having a positive value as the .sigma.p value under Hammett's rule.

Liquid crystal alignment film

A treating method for aligning liquid crystal molecules, which comprises forming on a substrate a polyimide film represented by a repeating unit of the formula (I): ##STR1## wherein R is a bivalent organic group, irradiating the film with ultraviolet rays having a spatial distribution of irradiation intensity through a mask, immersing it in a developing liquid and then in a rinsing liquid to form periodical concaves and convexes on the surface of the polyimide film, and aligning liquid crystal molecules on the concave-convex surface.

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Funabashi, Japan

Hideyuki Endo