Ortho-cyanophenyl biphenylcarboxylate liquid crystal esters and mixtures thereof
US4225454A · kind A · utility
1Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Jan 8, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/2007
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A number of alkyl and alkoxy-substituted ortho-cyanophenyl biphenylcarboxylate esters have been prepared for use as components for nematic liquid crystal mixtures which can be used in homeotropically aligned, field effect display devices or in dynamic scattering displays. These materials have large negative dielectric anisotropies and high birefringence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.