Mixtures of azo dyes from 2-amino-3-nitro-5-acyl thiophenes and certain aniline couplers
US4472169A · kind A · utility
3Cited by
7References
3Claims
0Family size
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Key dates
| Filing date | Apr 14, 1982 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Apr 14, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are mixtures of dyes of the formula ##STR1## wherein R is alkyl of 1-4 carbons; R.sup.1 is H or alkyl of 1-4 carbons; R.sup.2 is alkyl of 1-7 carbons, or ethoxyethoxyethyl; R.sup.3 is H or methoxy; and R.sup.4 is H, methyl, or --NHCOCH.sub.3. These mixtures exhibit improved properties such as reduced energy of application, for example, in the dyeing of polyester and cellulose diacetate or triacetate fibers and their blends with other synthetic and natural fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.