Difluorooxymethane derivative and liquid crystal composition
US5858270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Jan 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/0466
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In order to provide novel compounds which are useful as liquid crystal materials for low voltages in several liquid crystal displays, have a large dielectric anisotropy, and are low in viscosity; and to improve characteristics of liquid crystal compositions, difluorooxymethane derivatives expressed by the following general formula (I) and liquid crystal compositions containing the compound are proposed ##STR1## wherein each of l, m, and n is 0 or 1, rings A.sub.1 to A.sub.3 independently represent six-membered rings such as trans-1,4-cyclohexylene and 1,4-phenylene, Z.sub.1 to Z.sub.3 independently represent a bonding group such as covalent bond and --CH.sub.2 CH.sub.2 --, L.sub.1 to L.sub.4 independently represent hydrogen atom or halogen atom, and X represents a group such as halogen atom and OCF3. They are useful as liquid crystal materials for low voltages in several modes such as active matrix mode and STN mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.