Compound having alkadienyl group as side chain, and liquid crystal composition using same
US6174457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Feb 11, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/0459
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A compound represented by the general formula (1) ##STR1## wherein R.sub.1 is an alkadienyl group having 4 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; R.sub.2 is an alkenyl group having 2 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; one or more non-adjacent methylene groups (--CH.sub.2 --) in the alkadienyl group or the alkenyl group may be replaced by --O-- or the like; rings A.sub.1, A.sub.2, A.sub.3 and A.sub.4 are each 1,4-cyclohexylene, 1,4-phenylene or the like in which a hydrogen atom may be substituted by a halogen atom; Z.sub.1, Z.sub.2 and Z.sub.3 are each a single bond, --CH.sub.2 CH.sub.2 --, --CF.dbd.CF-- or the like; p and q are each 0 or 1. The above compound has a large elastic constant ratio, steep electro-optic characteristics and a little temperature dependence in a low temperature range, and so it is useful for the manufacture of a liquid crystal display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.