Liquid crystal compounds exhibiting negative anisotropy of permittivity
US6576303B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Aug 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel liquid crystal compound having a negative and absolutely large value of dielectric anisotropy, being excellent in compatibility with other liquid crystalline compounds at a low temperature and being stable chemically and physically, as well as a liquid crystal composition comprising this compound, and a liquid crystal display device comprising this liquid crystal composition are provided, said compound is expressed by the general formula (1):R1—A1—B1—A2—B2—A3—B3—Z—B4—A4—R2  (1)wherein A1, A2, A3 and A4 represent a single bond, 1,4-cyclohexylene, 1,4-phenylene which may be substituted with a fluorine atom(s) or the like; B1, B2, B3 and B4 represent a single bond, 1,2-ethylene, 1,2-ethenylene, 1,2-ethynylene, oxymethylene, methyleneoxy or the like; R1 and R2 represent an alkyl group having 1 to 10 carbon atoms or the like; and Z represents (I) to (VI): wherein X represents H or F, and Y represents difluoromethyl group, difluoromethoxy group, formyl group or carboxyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.