Coumarine dyestuffs of the dispersion series
US4002619A · kind A · utility
7Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1974 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Jun 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B55/004
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyestuffs of the formula ##STR1## wherein R, R.sub.1, and R.sub.2 represent optionally substituted alkyl groups that can be interrupted by heteroatoms, and also represent cycloalkyl, aralkyl, aryl, or heterocyclic radicals, R and R.sub.1 can also be hydrogen atoms, R.sub.1 and R.sub.2, together with the nitrogen atom, are able to form a 5-membered or 6-membered ring, R and R.sub.2 are able to combine to form a nitrogen-containing heterocycle, B is =O or =NH, and A represents a heterocycle. The new dyestuffs dye synthetic fibers, especially polyester fibers, in greenish yellow shades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.