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US4154697A
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Liquid crystalline hexahydroterphenyl derivatives
Assignee: Merck Patent GmbH
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Filing: 1978-01-11
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Granted: 1979-05-15
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Expires: 1998-01-11
Abstract
Abstract Novel liquid crystals have the formula ##STR1## wherein two of the rings A, B and C are aromatic and the third is a trans-1,4-disubstituted cyclohexane ring and R is alkyl or alkoxy each of 1 - 12 C-atoms. These compounds are particularly useful as additional components in liquid crystal dielectrics whereby the clear point of the dielectric is raised and the viscosity thereof is not deleteriously affected.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Joachim Krause
- 👤 Ludwig Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:29
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07; C07C; C07C1/00; C07C1/20; C07C1/22; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/782; C07C49/792; C07C2521/00; C07C2521/18; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
A hexahydroterphenyl compound of the formula ##STR18## wherein two of the rings A, B and C are aromatic and the third is a trans-1,4-disubstituted cyclohexane ring and R is alkyl or alkoxy each of 1-12 C atoms.
Claim 2
Dependent Claim
37 words
A hexahydroterphenyl compound of the formula ##STR18## wherein two of the rings A, B and C are aromatic and the third is a trans-1,4-disubstituted cyclohexane ring and R is alkyl or alkoxy each of 1-12 C atoms.
Claim 3
Dependent Claim
10 words
The hexahydroterphenyl compound of claim 1 having the formula ##STR19##
Claim 4
Dependent Claim
10 words
The hexahydroterphenyl compound of claim 1 having the formula ##STR20##
Claim 5
Dependent Claim
10 words
The hexahydroterphenyl compound of claim 1 having the formula ##STR21##
Claim 6
Dependent Claim
14 words
The hexahydroterphenyl compound of claim 1 wherein R is an unbranched alkyl or alkoxy.
Claim 7
Dependent Claim
14 words
The hexahydroterphenyl compound of claim 1 wherein R is alkyl of 1-10 C atoms.
Claim 8
Dependent Claim
14 words
The hexahydroterphenyl compound of claim 1 wherein R is alkoxy of 1-8 C atoms.
Claim 9
Dependent Claim
13 words
4-cyano-4'-(trans-4-n-propylcyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-butylcyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-pentylcyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-hexylcyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-heptylcyclohexyl)-biphenyl and 4-cyano-4'-(trans-4-n-octylcyclohexyl)-biphenyl, each a compound of claim 1.
Claim 10
Dependent Claim
17 words
4-cyano-4'-(trans-4-methoxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-ethoxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-propyloxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-butyloxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-pentyloxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-hexyloxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-heptyloxycyclohexyl)-biphenyl, 4-cyano-4'-(trans-4-n-octyloxycyclohexyl)-biphenyl, 4-cyano-4'-[trans-4-(2-methylbutyloxy)-cyclohexyl]-biphenyl and 4-cyano-4'-[trans-4-(2-ethylhexyloxy)-cyclohexyl]-biphenyl, each a compound of claim 1.
Claim 11
Dependent Claim
13 words
Trans-4-(4-n-propylphenyl)-1-(4-cyanophenyl)-cyclohexane, trans-4-(4-n-butylphenyl)-1-(4-cyanophenyl)-cyclohexane, trans-4-(4-n-pentylphenyl)-1-(4-cyanophenyl)-cyclohexane, trans-4-(4-n-hexylphenyl)-1-(4-cyanophenyl)-cyclohexane, trans-4-(4-n-heptylphenyl)-1-(4-cyanophenyl)-cyclohexane and trans-4-(4-n-octylphenyl)-1-(4-cyanophenyl)-cyclohexane, each a compound of claim 1.
Claim 12
Dependent Claim
24 words
A liquid crystalline dielectric composition having at least 2 liquid crystalline components, wherein at least one component is a hexahydroterphenyl compound of claim 1.
Claim 13
Dependent Claim
18 words
The composition of claim 11 wherein at least one component is not a hexahydroterphenyl compound of claim 1.
Claim 14
Dependent Claim
21 words
The liquid crystalline dielectric composition of claim 11, wherein the amount of hexahydroterphenyl compound is up to 30 percent by weight.
Claim 15
Dependent Claim
14 words
A liquid crystalline display element whose dielectric comprises a hexahydroterphenyl compound of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |