Back to results
US 4,256,634 AGranted
Iron complex azo dyestuffs
AssigneeBayer Aktiengesellschaft
InventorsHermann Goebel, Kurt Eitel
Life of this patent
Estimating the term…
Abstract
Iron complexes of azo dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 have the meaning indicated in the description, and their use for dyeing or printing various fibre materials, for example wool, silk and synthetic materials such as Perlon, but especially leather. The dyeings obtained are distinguished by good fastness properties.
Claims2
Iron complexes of azo dyestuffs of the formula ##STR3## wherein R.sub.1 =H, SO.sub.3 H or alkyl and
- R.sub.2 =H or alkyl
The iron complex of the azo dyestuff of the formula ##STR4##
Dependencies are inferred from the claim text.