Tolan derivative, liquid crystal composition containing the derivative, and liquid crystal display device having the composition
US5437815A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1992 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Sep 29, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C25/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A tolan derivative of a formula: ##STR1## where R represents a linear alkyl group having from 1 to 10 carbon atoms; X.sub.1, X.sub.2 and X.sub.3 independently represent a fluorine atom or a hydrogen atom, provided that one of them is necessarily a fluorine atom and the others are hydrogen atoms; and Y represents a nitrile group or a linear alkyl group having from 1 to 10 carbon atoms; and a liquid crystal composition containing the derivatives; and a liquid crystal display device having the composition are produced. The compound is compatible with other liquid crystal compounds, and by blending the compound with ordinary liquid crystal compounds, a liquid crystal composition having a broadened practical temperature range and an enlarged double refraction anisotropy is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.