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EP0337355A2
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Composition for liquid crystal aligning agent
Assignee: Nissan Chemical Corp
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Filing: 1989-04-10
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Granted: —
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Expires: 2009-04-10
Abstract
Abstract This invention is concerned with a composition to be used as an agent for aligning liquid crystals in a liquid crystal cell, wherein liquid crystal molecules are aligned with an increased pretilt angle with respect to the substrate, such composition consists essentially of a polyimide resin precursor having repeating units represented by the formula (I) wherein R₁ denotes an organic group constituting a tetracarboxylic acid or its derivative; and R₂ represents a divalent organic group constituting a diamine; and a precursor of a diimide compound represented by the formula (II) or (III): wherein R₃ denotes a divalent organic group constituting a diamine; each of R₄ and R₅ represents an organic groups constituting a dicarboxylic acid containing an alkyl group having 6 to 20 carbon atoms, or its derivative, wherein R₆ denotes an organic group constituting a tetracarboxylic acid or its derivative, and each of R₇ and R₈ represents an organic group constituting a monoamine containing an alkyl group having 6 to 20 carbon atoms.
Inventors
- 👤 Noriaki Nissan Chemical Ind.Ltd. Kohtoh
- 👤 Yoshihiro Nissan Chemical Ind.Ltd. Tsuruoka
- 👤 Toyohiko Nissan Chemical Ind.Ltd. Abe
- 👤 Hiroyoshi Nissan Chemical Ind.Ltd. Fukuro
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:55
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C08G73/1003; C08G73/1007; C08G73/1042; C08G73/1057; C08G73/106
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A composition for a liquid crystal aligning agent characterized by that it consists essntially of: a polyimide resin precursor having repeating units represented by the formula (I): wherein R₁ denotes an organic group constituting a tetracarboxylic acid or its derivative; and R₂ represents a divalent organic group constituting a diamine; and a precursor of a diimide compound represented by the formula (II) or (III): wherein R₃ denotes a divalent organic group constituting a diamine; each of R₄ and R₅ represents an organic group constituting a dicarboxylic acid containing an alkyl group having 6 to 20 carbon atoms, or its derivative, wherein R₆ denotes an organic group constituting a tetracarboxylic acid or its derivative; and each of R₇ and R₈ represents an organic group constituting a monoamine containing an alkyl group having 6 to 20 carbon atoms.
Claim 2
Dependent Claim
136 words
A composition for a liquid crystal aligning agent characterized by that it consists essntially of: a polyimide resin precursor having repeating units represented by the formula (I): wherein R₁ denotes an organic group constituting a tetracarboxylic acid or its derivative; and R₂ represents a divalent organic group constituting a diamine; and a precursor of a diimide compound represented by the formula (II) or (III): wherein R₃ denotes a divalent organic group constituting a diamine; each of R₄ and R₅ represents an organic group constituting a dicarboxylic acid containing an alkyl group having 6 to 20 carbon atoms, or its derivative, wherein R₆ denotes an organic group constituting a tetracarboxylic acid or its derivative; and each of R₇ and R₈ represents an organic group constituting a monoamine containing an alkyl group having 6 to 20 carbon atoms.
Claim 3
Dependent Claim
40 words
The composition according to Claim 1, wherein the precursor of a diimide compound of the formula (II) or (III) is in an amount of from 0.1 to 100% by weight, relative to the polyimide resin precursor of the formula (I).
Claim 4
Dependent Claim
81 words
The composition according to Claim 1, wherein the polyimide resin precursor of the formula (I) is the one obtained by reacting one or more compounds selected from tetracarboxylic acids of the formula (IV): wherein R₁ denotes a tetravalent organic group constituting a tetracarboxylic acid, the four carbonyl groups attached to R₁ being bonded directly to individual carbon atoms, respectively, and their derivatives, with a diamine of the formula (V): H₂N-R₂-NH₂ (V) wherein R₂ denotes a divalent organic group constituting a diamine.
Claim 5
Dependent Claim
87 words
The composition according to Claim 1, wherein the precursor of a diimide compound of the formula (II) is the one obtained by reacting one or more compounds selected from diamines of the formula (VI): H₂N-R₃-NH₂ (VI) wherein R₃ denotes a divalent organic group constituting a diamine, with dicarboxylic acids of the formulas (VII) and (VIII): wherein each of R₄ and R₅ denotes an organic group constituting a dicarboxylic acid containing an alkyl group having from 6 to 20 carbon atoms, or its derivative, or with their derivatives.
Claim 6
Dependent Claim
96 words
The composition according to Claim 1, wherein the precursor of a diimide compound of the formula (III) is the one obtained by reacting one or more compounds selected from tetracarboxylic acids of the formula (IX): wherein R₆ denotes a tetravalent organic group constituting a tetracarboxylic acid, the four carbonyl groups attached to R₆ being bonded directly to individual carbon atoms, respectively, and their derivatives, with monoamines of the formulas (X) and (XI): wherein each of R₇ and R₈ denotes an organic group constituting a monoamine containing an alkyl group having from 6 to 20 carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
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