US4469618A
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Liquid crystal mixture
Assignee: Merck Patent GmbH
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Filing: 1982-07-08
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Granted: 1984-09-04
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Expires: 2002-07-08
Abstract
Abstract A liquid crystal composition comprising, as the essential components, trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl is drivable over a wide temperature range and can be operated rapidly at low temperatures.
Inventors
- 👤 Shinji Hasegawa
- 👤 Kazuhisa Toriyama
- 👤 Ludwig Pohl
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:26
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %.
Claim 2
Dependent Claim
58 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %.
Claim 3
Dependent Claim
52 words
A liquid crystal composition according to claim 1, consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 20 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 22 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 28 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 24 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 6 mole %.
Claim 4
Dependent Claim
52 words
A liquid crystal composition according to claim 1, consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 25 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 19 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 24 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 25 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 7 mole %.
Claim 5
Dependent Claim
52 words
A liquid crystal composition according to claim 1, consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 16 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 23 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 6 mole %.
Claim 6
Dependent Claim
52 words
A liquid crystal composition according to claim 1, consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 20 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 23 mole %, trans-4-n-pentyl-(4-cyclophenyl)-cyclohexane in an amount of 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 18 mole %, and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 9 mole %.
Claim 7
Dependent Claim
66 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, and trans-4-n-propyl-(4-ethoxyphenyl)-cyclohexane in an amount of 15 mole %.
Claim 8
Dependent Claim
66 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, and trans-4-n-propyl-(4-ethoxyphenyl)-cyclohexane in an amount of 15 mole %.
Claim 9
Dependent Claim
56 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 16 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 23 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 6 mole %, and trans-4-n-propyl-(4-ethoxyphenyl)-cyclohexane in an amount of 15 mole %.
Claim 10
Dependent Claim
56 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 16 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 23 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 6 mole %, and trans-4-n-propyl-(4-ethoxyphenyl)-cyclohexane in an amount of 15 mole %.
Claim 11
Dependent Claim
98 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, trans-4-n-propyl-(4-ethoxyphenyl)cyclohexane in an amount of 15%, and 4-(4-hexyloxybenzoyloxy)benzoic acid-d-2-octyl ester for reducing the response time t f of the liquid crystal in a concentration such that the cholesteric pitch of the liquid crystal is equal to four times the cell gap.
Claim 12
Dependent Claim
98 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, trans-4-n-propyl-(4-ethoxyphenyl)cyclohexane in an amount of 15%, and 4-(4-hexyloxybenzoyloxy)benzoic acid-d-2-octyl ester for reducing the response time t f of the liquid crystal in a concentration such that the cholesteric pitch of the liquid crystal is equal to four times the cell gap.
Claim 13
Dependent Claim
92 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, and 4-(4-hexyloxybenzoyloxy)benzoic acid-d-2-octyl ester for reducing the response time t f of the liquid crystal in a concentration such that the cholesteric pitch of the liquid crystal is equal to four times the cell gap.
Claim 14
Dependent Claim
92 words
A liquid crystal composition consisting essentially of: trans-4-n-propyl-(4-ethylphenyl)-cyclohexane in an amount of 15 to 26 mole %, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane in an amount of 18 to 24 mole %, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane in an amount of 22 to 30 mole %, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane in an amount of 16 to 25 mole %, 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl in an amount of 5 to 9 mole %, and 4-(4-hexyloxybenzoyloxy)benzoic acid-d-2-octyl ester for reducing the response time t f of the liquid crystal in a concentration such that the cholesteric pitch of the liquid crystal is equal to four times the cell gap.
Claim 15
Dependent Claim
65 words
A liquid cyrstal composition according to claim 1, wherein said liquid crystal satisfies the following requirements: (1) the N--I point is 80° C. or higher; (2) the nematic phase in super-cooling is stably maintained for a long period of time at -30° C.; and (3) the viscosity is 50 to 60 CP or less at 0° C. and 300 CP or less at -20° C.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |