Pleochroic anthraquinone dyes
US4455253A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1982 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Feb 24, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/603
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An anthraquinone dye free from water-solubilizing and ionic substituents of the general formula: ##STR1## wherein Q is NH.sub.2, OH, alkyl, aryl, NO.sub.2 or halo; PA0 n is 0 to 4; PA0 each X independently is H, --SR, --NZ.sub.1 Z.sub.2 or Q; PA0 each R independently is alkyl, aryl or cycloalkyl; PA0 Z.sub.1 and Z.sub.2 are independently H, alkyl, cycloalkyl or aryl; provided that there are at least two different --SR groups and that where only two X's represent --SR groups at least one R is aryl and the two --SR groups are in the 1 & 5 or the 1 & 8 positions. In addition to the normal textile applications the dye is suitable for use in the coloration of liquid crystals for electro-optic displays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.