Liquid crystal 2,3-dicyano-hydroquinone derivatives
US4279770A · kind A · utility
36Cited by
2References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 12, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Sep 12, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Liquid crystal materials for liquid crystal display, having a large negative dielectric anisotropy and maintaining a liquid crystal state at a broad temperature range including room temperature are provided. These materials contain novel compounds expressed by the general formula (I) ##STR1## wherein X represents ##STR2## Y represents ##STR3## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms; PA1 R.sup.2 and R.sup.4 each represent an alkyl group of 1-10 carbon atoms; but PA1 compounds wherein ##STR4## are excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.