A yellow crosslinking polymeric dye was prepared by grafting the flavone moiety containing azo chromophore onto polyvinylamine backbone.The λ
max
of this polymeric dye in water is 382 nm.The polymeric dye is fixed to silk and cotton with a crosslinking agent
2-chloro-4
6-di(aminobenzene-4'-
β
-sulphatoethylsulphone)-1
3
5-s-triazine
which acts as a bridge between the fiber and dye molecules.The fixation of this polymeric dye reaches 99% and the dyed samples exhibit excellent rubbing and washing fastness.
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