US5084557A
Expired / Lapsed
US
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Diamino compounds and liquid crystal aligning films
Assignee: JNC Corp
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Filing: 1989-06-27
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Granted: 1992-01-28
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Expires: 2009-06-27
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: ##STR1## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 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
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:55
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: 10
Claim 1
Independent Claim
80 words
A liquid crystal aligning film which comprises a polymeric material of a polyimide having a structure unit represented by the formula: ##STR9## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 indicate a hydrogen atom or an alkyl group having one to four carbon atoms, respectively, and Ar indicates an aromatic group of four valences.
Claim 2
Dependent Claim
80 words
A liquid crystal aligning film which comprises a polymeric material of a polyimide having a structure unit represented by the formula: ##STR9## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 indicate a hydrogen atom or an alkyl group having one to four carbon atoms, respectively, and Ar indicates an aromatic group of four valences.
Claim 3
Dependent Claim
16 words
A liquid crystal aligning film as claimed in claim 1, wherein Ar is a benzene-1,2,4,5-tetraakyl group.
Claim 4
Dependent Claim
25 words
A liquid crystal aligning film as claimed in claim 1, wherein the polymeric material of the polyimide type makes possible to control a pretilt angle.
Claim 5
Dependent Claim
50 words
The liquid crystal aligning film of claim 2, wherein R 1 represents an octyl group, R 2 represents a methyl group; and R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 each represent a hydrogen atom.
Claim 6
Dependent Claim
15 words
The liquid crystal aligning film of claim 2, wherein R 1 represents a heptyl group.
Claim 7
Dependent Claim
15 words
The liquid crystal aligning film of claim 2, wherein R 1 represents a hexyl group.
Claim 8
Dependent Claim
15 words
The liquid crystal aligning film of claim 2, wherein R 1 represents a pantyl group.
Claim 9
Dependent Claim
15 words
The liquid crystal aligning film of claim 2, wherein R 1 represents a butyl group.
Claim 10
Dependent Claim
15 words
The liquid crystal aligning film of claim 2, wherein R 1 represents a propyl group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |