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EP0611812A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid coating composition forming a liquid crystal display element insulating film

Assignee: Nissan Chemical Corp
•
Filing: 1994-02-17
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Granted: —
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Expires: 2014-02-17
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Abstract

Abstract Disclosed is a liquid coating composition for forming a liquid crystal display element insulating film, which comprises a solution to be obtained by hydrolysis of Si(OR)₄ in the presence of an alkaline catalyst, a hydrolyzed product of R1 n Si(OR²) 4-n and/or Ti(OR³)₄, an aluminium salt and a deposition inhibitor, all having been uniformly mixed in an organic solvent. R, R² and R³ each are a C₁ to C₅ alkyl group, R¹ is an alkyl, alkenyl or aryl group, and n is 0 to 2. Though containing a trialkoxysilane having a high repelling property, the liquid coating composition may form an insulating film having high mechanical strength on a substrate and the coatability of a polyimide solution over the film is good. The adhesiveness of the oriented polyimide film to the insulating film is good. The insulating film has a high insulation property and has no bad influence on the display performance of liquid crystal display elements.

Inventors

  • 👤 Tatsuya C/O Central Research Institute Of Nogami
  • 👤 Rie C/O Central Research Institute Of Sakai
  • 👤 Takeshi C/O Central Research Institute Of Hosoya

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 04:47
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C09D183/14; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; C09K; C09K2323/00; C09K2323/02; C09K2323/05; C09K2323/053

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 149 words
A liquid coating composition for the formation of a liquid crystal display element insulating film, which comprises a solution to be obtained by hydrolyzing a tetraalkoxysilane of the general formula (1): Si(OR)₄   (1) wherein R represents an alkyl group having from 1 to 5 carbon atoms, in an organic solvent in the presence of an alkaline catalyst; a hydrolyzed product of an alkoxysilane of the general formula (2): R¹ n Si(OR²) 4-n (2) wherein R¹ represents an alkyl group, an alkenyl group or an aryl group, R² represents an alkyl group having from 1 to 5 carbon atoms, and n represents an integer of from 0 to 2, and/or a tetraalkoxy titanium of the general formula (3): Ti(OR³)₄   (3) wherein R³ represents an alkyl group having from 1 to 5 carbon atoms; and an aluminium salt and a deposition inhibitor, all having been uniformly mixed in an organic solvent.
Claim 2
Dependent Claim 81 words
A liquid coating composition for the formation of a liquid crystal display element insulating film according to claim 1, in which the solution to be obtained by hydrolyzing a tetraalkoxysilane of the general formula (1): Si(OR)₄   (1) wherein R represents an alkyl group having from 1 to 5 carbon atoms, in an organic solvent in the presence of an alkaline catalyst, contains particles having a particle size of from 10 nm to 80 nm, as measured by a dynamic light-scattering method.
Claim 3
Dependent Claim 139 words
A liquid coating composition for the formation of a liquid crystal display element insulating film according to claim 1 or 2, in which the molar content of the aluminium salt is from 0.05 to 1.0 times the mole of the sum of the alkoxide compounds of a tetraalkoxysilane of the general formula (1): Si(OR)₄   (1) wherein R represents an alkyl group having from 1 to 5 carbon atoms; an alkoxysilane of the general formula (2): R¹ n Si(OR²) 4-n (2) wherein R¹ represents an alkyl group, an alkenyl group or an aryl group, R² represents an alkyl group having from 1 to 5 carbon atoms, and n represents an integer of from 0 to 2; and a tetraalkoxy titanium of the general formula (3): Ti(OR³)₄   (3) wherein R³ represents an alkyl group having from 1 to 5 carbon atoms.
Claim 4
Dependent Claim 46 words
A liquid coating composition for the formation of a liquid crystal display element insulating film according to anyone of claims 1 to 3, in which the content of the deposition inhibitor is one time or more the weight of the aluminium salt in terms of Al₂O₃.
Claim 5
Dependent Claim 40 words
A liquid coating composition for the formation of a liquid crystal display element insulating film according to anyone of claims 1 to 4, in which the deposition inhibitor is chosen from among ethylene glycol, N-methylpyrrolidone, dimethylformamide, dimethylacetamide and their derivatives.

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