Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs
US4734218A · kind A · utility
4Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Jul 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B56/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided are novel dichroic azo dyestuffs, which contain skeletons represented by the following general formula: ##STR1## at one terminals of the long axes of the molecules of the azo dyestuffs, and liquid crystal compositions containing the dichroic azo dyestuffs in forms dissolved in liquid crystals. These dichroic azo dyestuffs have large dichroic ratios and high durability, and their compositions are employed as useful display devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.