Claims
- 1. A ferroelectric liquid crystalline mixture comprising at least two components, wherein at least one of the components is a compound of the formula ##STR7## wherein R.sup.1 is a straight-chain alkyl group with 7 to 9 carbon atoms and R.sup.2 is straight-chain alkyl group with 6 to 11 carbon atoms,
- and at least one of the other components is a chiral dopant.
- 2. The ferroelectric liquid crystalline mixture according to claim 1, wherein R.sup.2 is heptyl, octyl or nonyl.
- 3. The ferroelectric liquid crystalline mixture according to claim 2, wherein R.sup.1 is octyl.
- 4. The ferroelectric liquid crystalline mixture according to claim 3, wherein R.sup.2 is heptyl.
- 5. The ferroelectric liquid crystalline mixture according to claim 3, wherein R.sup.2 is octyl.
- 6. The ferroelectric liquid crystalline mixture according to claim 3, wherein R.sup.2 is nonyl.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1772/91 |
Jun 1991 |
CHX |
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Parent Case Info
this is a division of application Ser. No. 07/896,030, filed Jun. 9, 1992.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4752413 |
Inoue et al. |
Jun 1988 |
|
4898455 |
Buchecker et al. |
Feb 1990 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
242716 |
Apr 1987 |
EPX |
2215571 |
Sep 1987 |
JPX |
3275563 |
Nov 1988 |
JPX |
Non-Patent Literature Citations (3)
Entry |
Chemical Abstracts, vol. 109, No. 109:14928q (1988). |
Derwent Abstract No. 87-304332/43 for Japan 87/215571. |
Presentation as a Poster at the 14th International Liquid Crystal Conference--Jun. 21-26, 1992. Alkanoic acid 4-(5-alkyl-2-pyridinyl)phenyl esters: some novel smectic materials for display devices--S. M. Kelly, J. Funfschilling and A. Villiger. |
Divisions (1)
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Number |
Date |
Country |
Parent |
896030 |
Jun 1992 |
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