US4939003A
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Liquid crystal element
Assignee: Seiko Instruments Inc
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Filing: 1988-01-22
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Granted: 1990-07-03
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Expires: 2008-01-22
Abstract
Abstract Disclosed is a liquid crystal element with an improved orientation layer and a coating composition for forming such an orientation layer. The orientation layer consists essentially of a polymer with a Mark-Houwink coefficient of not less than 0.85, the Mark-Houwink coefficient being represented by the formula [I]: [η]=K·M.sup.α [I] wherein [η] represents intrinsic viscosity of the polymer determined by solution viscosity measuring method, K represents a constant, M represents molecular weight of the polymer, and α represents the Mark-Houwink coefficient. The coating composition comprises a polyfumaric acid ester represented by the formula [I]: ##STR1## wherein R 1 and R 2 , are the same or different and each represents a straight or branched alkyl group, cycloalkyl group, haloalkyl group, silalkyl group or siloxanylalkyl group; and a halogen-containing organic solvent.
Inventors
- 👤 Takao Aoki
- 👤 Takamasa Harada
- 👤 Kokichi Ito
- 👤 Koji Iwasa
- 👤 Norio Kawabe
- 👤 Hiroyuki Ikeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/057
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
124 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates which consists essentially of a polymer with a Mark-Houwink coefficient of not less than 0.85 in at least one solvent, the Mark-Houwink coefficient being represented by the formula (I): (η)=K·M.sup.α (I) wherein (η) represents intrinsic viscosity of the polymer determined by solution viscosity measuring method, K represents a constant, M represents molecular weight of the polymer, and α represents the Mark-Houwink coefficient; and a liquid crystal contained in the chamber, wherein the polymer consists essentially of a poly(substituted)acetylene, a polyfumaric acid ester, or a copolymer thereof.
Claim 2
Dependent Claim
124 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates which consists essentially of a polymer with a Mark-Houwink coefficient of not less than 0.85 in at least one solvent, the Mark-Houwink coefficient being represented by the formula (I): (η)=K·M.sup.α (I) wherein (η) represents intrinsic viscosity of the polymer determined by solution viscosity measuring method, K represents a constant, M represents molecular weight of the polymer, and α represents the Mark-Houwink coefficient; and a liquid crystal contained in the chamber, wherein the polymer consists essentially of a poly(substituted)acetylene, a polyfumaric acid ester, or a copolymer thereof.
Claim 3
Dependent Claim
16 words
The liquid crystal element of claim 1 wherein the poly(substituted)acetylene is poly(trimethylsilylpropyne) or a derivative thereof.
Claim 4
Dependent Claim
21 words
The liquid crystal element of claim 1, wherein the surface tension of the polymer or the copolymer thereof is 8-40 dyn/cm.
Claim 5
Dependent Claim
17 words
The liquid crystal element of claim 1, wherein the orientation layer has a thickness of 5-200 nm.
Claim 6
Dependent Claim
87 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates, which consists essentially of a polyfumaric acid ester represented by the formula (II): ##STR7## wherein R 1 and R 2 are the same or different and each represents a straight or branched alkyl group, cycloalkyl group, haloalkyl group, silalkyl group or silxanylalkyl group; and a liquid crystal contained therein.
Claim 7
Dependent Claim
87 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates, which consists essentially of a polyfumaric acid ester represented by the formula (II): ##STR7## wherein R 1 and R 2 are the same or different and each represents a straight or branched alkyl group, cycloalkyl group, haloalkyl group, silalkyl group or silxanylalkyl group; and a liquid crystal contained therein.
Claim 8
Dependent Claim
45 words
The liquid crystal element of claim 5, wherein at least one of R 1 and R 2 , which are the same or different, represent a secondary alkyl group with 3 to 9 carbon atoms or a cycloalkyl group with 3 to 12 carbon atoms.
Claim 9
Dependent Claim
28 words
The liquid crystal element of claim 5, wherein at least one of R 1 and R 2 , which are the same or different, represent a fluoroalkyl group.
Claim 10
Dependent Claim
31 words
The liquid crystal element of claim 5, wherein R 1 and R 2 , which are the same or different, represent an ispropyl group, a cyclohexyl group or a derivative thereof.
Claim 11
Dependent Claim
19 words
The liquid crystal element of claim 5, wherein the surface tension of the polyfumaric acid ester is 8-40 dyn/cm.
Claim 12
Dependent Claim
17 words
The liquid crystal element of claim 5, wherein the orientation layer has a thickness of 5-200 nm.
Claim 13
Dependent Claim
141 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates, which consists essentially of a polymer with a Mark-Houwink coefficient of not less than 0.85 in at least one solvent, the Mark-Houwink coefficient being represented by the formula (I): (η)=K·M.sup.α (I) wherein (η) represents intrinsic viscosity of the polymer determined by solution viscosity measuring method, K represents a constant, M represents molecular weight of the polymer, and α represents the Mark-Houwink coefficient; and a liquid crystal contained in the chamber, wherein the polymer is a polymer selected from the group consisting of poly(substituted)acetylenes, polyfumaric acid esters, poly-N-substituted maleimides, poly-N,N,N - ,N - ,-tetralkylfumaride, poly(benzylacrylate), poly[1-(N-carboethoxyphenyl)-methacrylamide, poly(vinyl sulfate), poly(p-diethylphosphono-methylstyrene-co-styrene), poly(1-isobutyl-3-phenylsilsesquioxane , poly(3-methylbutenesilsesquioxane) and poly(phenylsilsesquinoxane).
Claim 14
Dependent Claim
141 words
A liquid crystal element comprising: a pair of substrates secured by a sealing material to face each other so as to define a chamber therebetween; an orientation layer formed on the inner side of each of the substrates, which consists essentially of a polymer with a Mark-Houwink coefficient of not less than 0.85 in at least one solvent, the Mark-Houwink coefficient being represented by the formula (I): (η)=K·M.sup.α (I) wherein (η) represents intrinsic viscosity of the polymer determined by solution viscosity measuring method, K represents a constant, M represents molecular weight of the polymer, and α represents the Mark-Houwink coefficient; and a liquid crystal contained in the chamber, wherein the polymer is a polymer selected from the group consisting of poly(substituted)acetylenes, polyfumaric acid esters, poly-N-substituted maleimides, poly-N,N,N - ,N - ,-tetralkylfumaride, poly(benzylacrylate), poly[1-(N-carboethoxyphenyl)-methacrylamide, poly(vinyl sulfate), poly(p-diethylphosphono-methylstyrene-co-styrene), poly(1-isobutyl-3-phenylsilsesquioxane , poly(3-methylbutenesilsesquioxane) and poly(phenylsilsesquinoxane).
Claim 15
Dependent Claim
19 words
The liquid crystal element of claim 11, wherein the Mark-Houwink coefficient of the polymer is not less than 0.95.
Claim 16
Dependent Claim
17 words
The liquid crystal element of claim 12, wherein the surface tension of the polymer is 8-40 dyn/cm.
Claim 17
Dependent Claim
19 words
The liquid crystal element of claim 11, wherein the Mark-Houwink coefficient of the polymer is not less than 0.90.
Claim 18
Dependent Claim
17 words
The liquid crystal element of claim 11, wherein the orientation layer has a thickness of 5-200 nm.
References Cited (Backward Citations)
US4759614A
Cited
US4618514A
Cited
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