Monoazo dyestuff being stable under dyeing conditions; its manufacture and its use
US4319880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0029
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a novel crystallographic modification (".beta.-modification") being stable under dyeing conditions of the dyestuff of the formula ##STR1## which is characterized by an X-ray diffraction pattern as shown in FIG. 1 with characteristic reflexes at the following glance angles .theta. (CuK.sub..alpha. radiation) with the relative intensities: ______________________________________ .phi. 3.71 6.62 7.85 8.6 9.43 10.51 11.8 12.57 relat. 67 44 34 36 60 60 46 100 intensity ______________________________________ to processes for their manufacture and to their use for dyeing fibrous materials of cellulose esters or of synthetic linear polyesters or blended fabrics of these polyesters and wool or rayon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.