Biphenyl derivative compounds and liquid crystal materials and devices containing such compounds
US4035056A · kind A · utility
39Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1976 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Apr 16, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A family of new compounds suitable for adding to cyanobiphenyls and other liquid crystal compounds to give mixtures having extended liquid crystal temperature ranges is characterised by the formula ##STR1## or, a simple substituted derivative thereof, where A is (CH.sub.2).sub.n, (CH.sub.2).sub.n O O(CH.sub.2).sub.n, n being an integer in the range 1-4, either X is hydrogen or an alkyl, alkoxy or alkanoyloxy group and Y is a cyano group or Y is hydrogen or an alkyl, alkoxy or alkanoyloxy group and X is a cyano group. The mixtures so produced may be used in known kinds of liquid crystal electro-optic devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.