| 摘要 |
Disclosed is a process for imparting coloration of good light fastness to a substrate comprising or consisting of homo- and co-polymers of acrylonitrile or of dicyanoethylene, or acid modified synthetic polyamide or polyester, which process comprises mass dyeing, dyeing or printing such substrate, employing, as dyestuff, a compound or mixture of compounds of formula I, <IMAGE> I wherein either R is hydrogen, or a straight or branched chain C1-8alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, CONH2, C1-4-alkoxy, phenyl, phenoxy, -O-CO-R5 or -CO-O-R5, and R1 is a straight or branched chain C1-8alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, -CONH2, C1-4alkoxy, phenyl, phenoxy, -O-CO-R5 or -CO-O-R5; or phenyl, unsubstituted or monosubstituted by halogen, C1-4alkyl or C1-4alkoxy, or R and R1, together with the nitrogen atom to which they are attached, form a morpholine, piperidine, pyrrolidine, piperazine or N-C1-4alkyl-piperazine ring, R2 is hydrogen or a straight or branched chain C1-8alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, -CONH2 or -COOR5, each R3, independently, is hydrogen or unsubstituted C1-4alkyl, each R4, independently, is hydrogen, unsubstituted C1-4alkyl or unsubstituted phenyl, R5 is unsubstituted C1-4alkyl or unsubstituted phenyl, and A(-) is an anion, with the proviso that any substituted alkyl as R, R1 or R2 is of at least 2 carbon atoms.
|
