Anthraquinone compounds
US4493785A · kind A · utility
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4References
8Claims
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Assignee
Inventors
Key dates
| Filing date | Apr 6, 1983 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Apr 6, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/603
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New pleochroic anthraquinones, suitable for use in colored liquid crystal displays based upon the guest-host effect, of the formula: ##STR1## wherein R & R.sup.1, each independently, represents C.sub.4-7 -n-alkyl; and PA1 R.sup.2 & R.sup.3, each independently, represents H or C.sub.1-4 -alkyl. The invention also concerns processes for the preparation of the pleochroic compounds and some intermediate compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.