Disperse phenylazophenylazobarbituric acid dyestuffs

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, Z is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, and 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.

Dependencies are inferred from the claim text.