Disperse phenylazophenylazobarbituric acid dyestuffs
US4062836A · kind A · utility
3Cited by
13References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Mar 24, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B31/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The instant invention relates to diazo dyestuffs of the formula ##STR1## where X and Y are hydrogen, chloro, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, PA1 Z is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, and PA1 R.sub.1 and R.sub.2 each are hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkyl substituted by C.sub.1 -C.sub.4 alkoxy, hydroxy or cyano. These dyestuffs dye polyester to yield powerful dyeings in yellow shades, which are distinguished by outstanding fastness to light and sublimation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.