EP0282254A2
Expired / Lapsed
EP
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Diamino compounds and liquid crystal aligning films
Assignee: JNC Corp
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Filing: 1988-03-07
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Granted: —
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Expires: 2008-03-07
Abstract
Abstract The present invention provides diamino compounds and liquid crystal aligning films comprising polyimides which are obtained from the said diamino compounds represented by the general formula: wherein R₁ indicates an alkyl group having 3 to 22 carbon atoms, R₂ indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R₃-R₁₀ indicate a hydrogen atom or a methyl group, respectively. The liquid crystal aligning films are useful for STN mode display cells in realizing a high pretilt angle.
Inventors
- 👤 Shizuo Murata
- 👤 Naoyoshi Emoto
- 👤 Kenji Furukawa
- 👤 Kouichi Kunimune
- 👤 Ryuji Kobayashi
- 👤 Masami Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 01:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/027; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
A diamino compound, characterised by having the general formula: wherein R₁ represents an alkyl group having 3 to 22 carbon atoms, R₂ represents a hydrogen atom or an alkyl group having 1 to 22 carbon atoms and R₃-R₁₀ are the same or different and each represents a hydrogen atom or a methyl group.
Claim 2
Dependent Claim
53 words
A diamino compound, characterised by having the general formula: wherein R₁ represents an alkyl group having 3 to 22 carbon atoms, R₂ represents a hydrogen atom or an alkyl group having 1 to 22 carbon atoms and R₃-R₁₀ are the same or different and each represents a hydrogen atom or a methyl group.
Claim 3
Dependent Claim
22 words
A diamino compound as claimed in claim 1, wherein R₂ is a methyl group and each of R₃-R₁₀ represents a hydrogen atom.
Claim 4
Dependent Claim
23 words
A diamino compound as claimed in claim 1 or 2, wherein R₁ is a straight-chain alkyl group having 5 to 10 carbon atoms.
Claim 5
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]decane.
Claim 6
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]decane.
Claim 7
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]nonane.
Claim 8
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]nonane.
Claim 9
Dependent Claim
2 words
2,2 Bis[4-(4-aminophenoxy)phenyl]octane.
Claim 10
Dependent Claim
2 words
2,2 Bis[4-(4-aminophenoxy)phenyl]octane.
Claim 11
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]heptane.
Claim 12
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]heptane.
Claim 13
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]hexane.
Claim 14
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]hexane.
Claim 15
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]pentane.
Claim 16
Dependent Claim
1 words
2,2-Bis[4-(4-aminophenoxy)phenyl]pentane.
Claim 17
Dependent Claim
69 words
A liquid crystal aligning film, characterised in that it comprises a polymeric material of a polyimide having a structural unit represented by the general formula: wherein R₁ and R₂ have the meanings defined in claim 1, R₃ to R₁₀ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and Ar represents an aromatic group having 4 valences.
Claim 18
Dependent Claim
16 words
A liquid crystal aligning film as claimed in claim 10, wherein Ar is a benzene-1,2,4,5-tetrayl group.
Claim 19
Dependent Claim
27 words
A liquid crystal aligning film as claimed in claim 10 or 11, wherein the polymeric material of the polyimide type makes possible to control a pretilt angle.
References Cited (Backward Citations)
No citation records indexed.
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