3-secondary aminomethylene-4-lower-alkyl-5-azo-6-hydroxypyrid-2-one dyestuffs

Abstract

Abstract A water-soluble salt of a 3-tertiary amino-5-azo-6-hydroxypyrid2-one of the formula WHEREIN A is phenyl, napthyl or phenyl substituted with one or two substituents selected from nitro, methyl, methoxy, halogen, acetamido, sulphonamido, phenylazo and tolyazo, T is methyl, ethyl, propyl, phenyl or tolyl, Y is hydrogen, methyl, ethyl, propyl, hydroxyethyl, methoxypropyl, napthyl, phenyl, or phenyl substituted with nitro, chloro, methyl, or methoxy and X is amino of the formula -NR1R2 wherein R1 and R2 are methyl, ethyl, propyl, hydroxyethyl or cyanoethyl or together with the nitrogen to which they are attached form a piperidino, morpholino, thiomorpholino, hexahydroazepino or 2-methylpyrrolidino ring. The dyestuff is prepared by reacting the 3-halogen derivative or said dyestuff with a secondary amine of the formula NHR1R2 wherein R1 and R2 are defined above and forming the salt of the resulting product with an inorganic or organic acid. The dyestuff is used to dye polymeric materials, particularly polyacrylonitrile distinguished by good wet and light fastness and build up properties.

Inventors

• 👤 Nigel Hughes

Bibliographic Details