METHOD FOR IMPROVING THE FASTNESS TO GAS FADING OF DYED MATERIAL
The fastness to gas fading of dyeings and plastics is improved by treating them with a water soluble piperizine of formula in which R1 is an alkyl or alkenyl group of 6-18 carbon atoms, an unsubstituted cycloalkyl group of 6-18 carbon atoms or a mono-nuclear aryl or aralkyl group the ring of which...
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