Cationic or basic azo dyes consisting of an amino benzothiazole diazo component and a disubstituted aniline component, which dyes contain at least one aromatic radical
US5635607A · kind A · utility
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20Claims
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Key dates
| Filing date | Apr 21, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Apr 21, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The cationic or basic aminobenzothiazole dyes disclosed herein are particularly suitable for dyeing paper. Paper is dyed with these dyes in blue or violet shades of good fastness properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.