Cationic diazacyanine dyestuffs for dyeing polyacrylonitrile-wool blends
US4840641A · kind A · utility
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5Claims
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Key dates
| Filing date | Apr 4, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Apr 4, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/927
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Cationic diazacyanine dyestuffs of the formula ##STR1## and their mixtures with the isomeric dyestuffs of the formula ##STR2## wherein R represents methyl or ethyl and PA0 X.sup.- represents a colorless anion, are suitable for dyeing polyacrylonitrile and, in particular, polyacrylonitrile-wool mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.