US4293193A
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Amine-substituted liquid crystal compositions
Assignee: Temple University
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Filing: 1979-08-15
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Granted: 1981-10-06
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Expires: 1999-08-15
Abstract
Abstract A group of novel, low temperature liquid crystalline compounds with terminal, primary or secondary amino polar electron donating groups are disclosed. These include, for example, p-alkyl-or alkoxy-phenylcyclohexanes, bicyclohexyls or biphenyl ring systems, substituted at the p' position with alkyl primary or secondary amines, of which one example is p-(4-trans-n-pentylcyclohexyl)benzylamine.
Inventors
- 👤 Mortimer M. Labes
- 👤 John H. MacMillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C09K19/10; C09K19/12; C09K19/42
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
49 words
A liquid crystalline composition comprising at least two liquid crystalline compounds including one or more liquid crystal compounds from the group consisting of: ##STR10## where R 1 is an alkyl or alkoxy group having 1-10 carbon atoms, and where R 2 is an alkyl group of 1-10 carbon atoms.
Claim 2
Dependent Claim
49 words
A liquid crystalline composition comprising at least two liquid crystalline compounds including one or more liquid crystal compounds from the group consisting of: ##STR10## where R 1 is an alkyl or alkoxy group having 1-10 carbon atoms, and where R 2 is an alkyl group of 1-10 carbon atoms.
Claim 3
Dependent Claim
58 words
A liquid crystalline composition comprising a miscible mixture of a first liquid crystal compound as recited in claim 1 and a second liquid crystal compound from the group consisting of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzonitriles, the alkyl and alkoxy groups having 1-10 carbon atoms, (Formula 14) and 4-n-alkyl-(or alkoxy-)-4'-cyanobiphenyls, the alkyl and alkoxy groups having 1-10 carbon atoms (Formula 15).
Claim 4
Dependent Claim
34 words
A liquid crystalline composition as recited in claim 2 in which the first liquid crystalline compound is present in an amount sufficient to broaden the mesogenic range of the second nematic liquid crystal compound.
Claim 5
Dependent Claim
32 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzylamine, the alkyl and alkoxy groups having 1-10 carbon atoms (Formula 5).
Claim 6
Dependent Claim
32 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of N-alkyl-p-(4-n-alkyl-(or alkoxy-)cyclohexyl) benzylamine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 6).
Claim 7
Dependent Claim
31 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of 4-n-alkyl-(or alkoxy-)-4'-biphenylmethanamine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 8).
Claim 8
Dependent Claim
31 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of N-alkyl-4-n-alkyl-(or alkoxy-)-4'-biphenylmethanamine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 9).
Claim 9
Dependent Claim
31 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of N-alkyl-4-n-alkyl-(or alkoxy-)-4'-biphenylamine the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 10).
Claim 10
Dependent Claim
32 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of 4-n-alkyl-(or alkoxy-)-trans,trans-4'-bicyclohexyl methanamine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 11).
Claim 11
Dependent Claim
33 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of N-alkyl-4-n-alkyl-(or alkoxy-)-trans, trans-4'-bicyclohexyl methanamine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 12).
Claim 12
Dependent Claim
33 words
A liquid crystalline composition as recited in claim 3 in which the first liquid crystal compound consists of N-alkyl-4-n-alkyl-(or alkoxy-)-trans, trans-4'-bicyclohexyl amine, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 13).
Claim 13
Dependent Claim
69 words
A liquid crystalline composition consisting of a miscible mixture of: (a) A first material consisting of p-(trans-4-n-alkyl(or alkoxy-)cyclohexyl) aniline (Formula 16); and (b) A second liquid crystalline material consisting of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzonitrile, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 14) or 4-n-alkyl-(or alkoxy-)-4'-cyanobiphenyls (Formula 15), the first material being present in an amount sufficient to broaden the mesogenic range of the second liquid crystalline material.
Claim 14
Dependent Claim
69 words
A liquid crystalline composition consisting of a miscible mixture of: (a) A first material consisting of p-(trans-4-n-alkyl(or alkoxy-)cyclohexyl) aniline (Formula 16); and (b) A second liquid crystalline material consisting of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzonitrile, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 14) or 4-n-alkyl-(or alkoxy-)-4'-cyanobiphenyls (Formula 15), the first material being present in an amount sufficient to broaden the mesogenic range of the second liquid crystalline material.
Claim 15
Dependent Claim
72 words
A liquid crystalline composition consisting of a miscible mixture of: (a) A first liquid crystalline material consisting of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzylamine (Formula 5); and (b) A second liquid crystalline material consisting of a eutectic mixture of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzonitriles, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 14), the first liquid crystalline material being present in an amount sufficient to broaden the mesogenic range of the second liquid crystalline material.
Claim 16
Dependent Claim
72 words
A liquid crystalline composition consisting of a miscible mixture of: (a) A first liquid crystalline material consisting of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzylamine (Formula 5); and (b) A second liquid crystalline material consisting of a eutectic mixture of p-(trans-4-n-alkyl-(or alkoxy-)cyclohexyl) benzonitriles, the alkyl or alkoxy groups having 1-10 carbon atoms (Formula 14), the first liquid crystalline material being present in an amount sufficient to broaden the mesogenic range of the second liquid crystalline material.
Claim 17
Dependent Claim
71 words
An electro-optical device comprising two electrodes, one of which is transparent and between which is disposed a nematic liquid crystal film wherein said nematic liquid crystal film is adapted to be subjected to an electric field to cause rearrangement of the nematic liquid crystal orientation, and wherein also said nematic liquid crystal film is composed of a composition recited in any one of claims 1 to 5 and 7 to 14.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |