Process for coloring fibre forming polyamides in the melt with azo pigments
US4370431A · kind A · utility
3Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1981 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Aug 10, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3462
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for coloring polyamides in the melt with azo pigments of the formula ##STR1## wherein A is the radical of a diazo or tetraazo component, R.sub.1, R.sub.2 and R.sub.3 are hydrogen atoms or alkyl, cyclo alkyl, phenylalkyl or aryl radicals, and n is 1 or 2. Articles colored with the pigments have level, strong yellow shades of excellent fastness to light, wet processing, rubbing and thermofixation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.