Nippon Oil Company

Tomohiro Toya

Hajime Hara

Shigeki Iida

Tetsuo Satoh

Shingo Orii

Yukio Kobayashi

Takehiro Toyooka

Yoshihiro Kobori

Takafumi Ishii

Tadahiro Kaminade

Takaya Kubo

Satoh Tetsuo

Itoh Hiroyuki

An electrode for an electrochromic device is disclosed having an electrically conductive substrate and a plurality of capacitive members arranged on the substrate, each of the capacitive members containing fine particles bound together with a binder, the fine particles having electric capacity of not less than 1 farad/g, the binder in the capacitive member having degree of swelling of not higher than 20 mass % when measured after the binder in the capacitive member is immersed in .gamma.-butyrolactone at 25.degree. C. for 24 hours. Also disclosed is an electrochromic device having the above electrode as a counterelectrode, an electrochromic electrode, and an electrolyte interposed therebetween.

Electrode for electrochromic device and electrochromic device

A rewritable or repeatedly employable recording medium having a base and a recording layer film provided on said base, characterized in that said recording layer film is formed by a thermotropic cholesteric liquid crystal polyester.

Method of recording

A nonlinear optical material obtained by blending 50-99% by weigth of a polypeptide and 1-50% by weight of a compound exerting a nonlinear optical response has a very large nonlinear optical constant, exterts a high and stable SHG activity and easily undergoes phase matching.

Nonlinear optical materials of polypeptides

Provided is a wholly aromatic polyester superior in melt processability and tenacity which consists essentially of the following structural units (A), (B) and (C) and wherein 0.2 to 40 mole % of the total of said units are of ortho configuration; ##STR1## where Ar.sup.1 and Ar.sup.2 each represent a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, the hydrogen atoms of said aromatic hydrocarbon group may be substituted with a halogen atom, an alkyl or alkoxy group having 1 to 4 carbon atoms, or phenyl; Z is ##STR2## --O--, or --SO.sub.2 --; m is 0 or 1, at least 60 mole % of Ar.sup.1 being constituted by a group selected from 1,4-phenylene, substituted 1,4-phenylenes, naphthyl and 4,4'-biphenyl.

Wholly aromatic polyesters

Recording medium

A cholesteric liquid crystal polyester comprising the following structural units (A), (B) and (C): ##STR1## wherein Ar.sup.1 and Ar.sup.2 represent each independently a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, of which one or more hydrogen atoms may be substituted by one or more halogen atoms, alkyl or alkoxy groups having 1 to 4 carbon atoms, provided that at least 60 mol % of Ar.sup.1 in the polymer is constituted by at least one group selected from 1,4-phenyl group, 2,6-naphthyl group and 4,4'-biphenyl group.

Cholesteric liquid crystal polyester

A cholesteric liquid crystal polyester consisting essentially of the following structural units (A), (B), (C) and (D): ##STR1##

Cholesteric liquid crystal polyesters

A process for producing a cholesteric liquid crystal polyester film or sheet possessing an ordered planar texture (monodomain structure), which process comprises providing a cholesteric liquid crystal polyester in which 1 to 10 mol % of constituent monomer units are optically active, allowing the cholesteric liquid crystal polyester to be formed in the temperature range of 150.degree. to 350.degree. into a film or sheet having a thickness not larger than 100 .mu.m, and then cooling the film or sheet rapidly.

Process for producing cholesteric liquid crystal polyester film or sheet

A cholesteric liquid crystal polyester consisting essentially of structural units represented by the following formulae (A), (B) and (C): ##STR1## which is optically active; and ##STR2## wherein X is hydrogen, halogen, or alkyl having not more than four carbon atoms.

Cholesteric liquid crystal polyester from hydroquinone, cyclohexane

A process for preparing a cholesteric liquid crystal copolyester consisting essentially of structural units represented by the following formula (A), (B), (C) and (D): ##STR1## which is optically active characterized in that a polyethylene terephthalate oligomer having a (B)/(A) mole ratio in the range of 1.1 to 1.8, p-acetoxybenzoic acid and 3-methyladipic acid are reacted to prepare the final cholesteric liquid crystal copolyester having an inherent viscosity of at least 0.4 dl/g.

Cholesteric liquid crystal copolyesters

A cholesteric liquid crystal polyester consisting essentially of structural units represented by the following formulae (A), (B), (C), (D) and (E): ##STR1## the units (A) and (B) being present each in a proportion of 5 to 50 mol %, the unit (C) present in a proportion of 20 to 80 mol %, and the units (D) and (E) present each in a proportion of 1 to 40 mol %.

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Yokohama, Japan

Tomohiro Toya