Claims
- 1. An electro-optical cell containing a dielectric which consists essentially of a compound of the formula ##STR13## wherein R is straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof.
- 2. A nematic composition which comprises a compound of the formula ##STR14## wherein R is straight-chain alkyl of 3 to 8 carbon atoms or straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof, and one or more compounds of the formula ##STR15## wherein R.sub.1 is straight-chain alkyl of 2 to 8 carbon atoms, straight-chain alkoxy of 4 to 7 carbon atoms, straight-chain alkanoyloxy of 2 to 8 carbon atoms or straight-chain alkylcarbonate of 2 to 11 carbon atoms.
- 3. A nematic composition which comprises a compound of the formula ##STR16## wherein R is straight-chain alkyl of 3 to 8 carbon atoms or straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof, and one or more compounds of the formula ##STR17## wherein R.sub.2 is straight-chain alkyl of 4 to 7 carbon atoms or straight-chain alkylcarbonate of 2 to 12 carbon atoms.
- 4. A nematic composition which comprises a compound of the formula ##STR18## wherein R is straight-chain alkyl of 3 to 8 carbon atoms or straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof, and one or more compounds of the formula ##STR19## wherein R.sub.3 is straight-chain alkyl of 4 to 8 carbon atoms, straight-chain alkoxy of 5 to 8 carbon atoms or straight-chain alkylcarbonate of 3 to 11 carbon atoms.
- 5. A nematic composition which comprises a compound of the formula ##STR20## wherein R is straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof, and one or more compounds of the formula ##STR21## wherein R.sub.4 is straight-chain alkyl or straight-chain alkoxy.
- 6. The nematic composition in accordance with claim 5, which comprises 4'-cyano-4-biphenylyl pentyl carbonate, 4'-cyano-4-biphenylyl heptyl carbonate and 4'-n-hexyl-4-cyanobiphenyl.
- 7. The nematic composition in accordance with claim 4, which comprises 4'-cyano-4-biphenylyl heptyl carbonate and p-n-heptylbenzoic acid p'-cyanophenyl ester.
- 8. The nematic composition in accordance with claim 5, which comprises 4'-cyano-4-biphenylyl pentyl carbonate, 4'-cyano-4-biphenylyl octyl carbonate and 4'-n-hexyl-4-cyanobiphenyl.
- 9. The nematic composition in accordance with claim 5, which comprises 4'-cyano-4-biphenylyl pentyl carbonate, 4'-cyano-4-biphenylyl octyl carbonate and 4'-n-heptyl-4-cyanobiphenyl.
- 10. The nematic composition in accordance with claim 5, which comprises 4'-cyano-4-biphenylyl octyl carbonate, 4'-cyano-4-biphenylyl hexanoate and 4'-n-heptyl-4-cyanobiphenyl.
- 11. The nematic composition in accordance with claim 4, which comprises 4'-cyano-4-biphenylyl octyl carbonate, p-[(p-cyanophenoxy)carbonyl]phenyl n-heptyl carbonate and 4'-n-heptyl-4-cyanobiphenyl.
- 12. The nematic composition in accordance with claim 2, which comprises 4'-cyano-4-biphenylyl octyl carbonate, 4'-cyano-4-biphenylyl hexanoate and p-[(p-n-hexylbenzyliden)amino]benzonitrile.
- 13. The nematic composition in accordance with claim 2, which comprises 4'-cyano-4-biphenylyl octyl carbonate, 4'-cyano-4-biphenylyl pentyl carbonate and p-[(p-n-hexylbenzyliden)amino]benzonitrile.
- 14. The nematic composition in accordance with claim 2, which comprises 4'-cyano-4-biphenylyl octyl carbonate, 4'-cyano-4-biphenylyl valerate and p-[(p-n-propylbenzyliden)amino]benzonitrile.
- 15. An electro-optical cell containing a dielectric which consists essentially of a nematic compound of the formula ##STR22## wherein R is straight-chain alkoxy of 3 to 10 carbon atoms, or mixtures thereof.
Priority Claims (1)
Number |
Date |
Country |
Kind |
16242/73 |
Nov 1973 |
CH |
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Parent Case Info
This is a division, of application Ser. No. 523,594, filed Nov. 14, 1974, now U.S. Pat. No. 3,952,046.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
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Parent |
523594 |
Nov 1974 |
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