Basic phenoxazine dyestuffs

Abstract

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, ##STR1## wherein either R is hydrogen, or a straight or branched chain C.sub.1--8 alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, CONH.sub.2, C.sub.1--4 -alkoxy, phenyl, phenoxy, --O--CO--R.sub.5 or --CO--O--R.sub.5, and R.sub.1 is a straight or branched chain C.sub.1--8 alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, --CONH.sub.2, C.sub.1--4 alkoxy, phenyl, phenoxy, --O--CO--R.sub.5 or --CO--O--R.sub.5 ; or phenyl, unsubstituted or monosubstituted by halogen, C.sub.1--4 alkyl or C.sub.1--4 alkoxy, or R and R.sub.1, together with the nitrogen atom to which they are attached, form a morpholine, piperidine, pyrrolidine, piperazine or N--C.sub.1--4 alkyl-piperazine ring, R.sub.2 is hydrogen or a straight or branched chain C.sub.1--8 alkyl radical, unsubstituted or mono-substituted by OH, CN, Cl, Br, --CONH.sub.2 or --COOR.sub.5, each R.sub.3, independently, is hydrogen or unsubstituted C.sub.1--4 alkyl, each R.sub.4, independently, is hydrogen, unsubstituted C.sub.1--4 alkyl or unsubstituted phenyl, R.sub.5 is unsubstituted C.sub.1--4 alkyl or unsubstituted phenyl, and A.sup..crclbar. is an anion, with the proviso that any substituted alkyl as R, R.sub.1 or R.sub.2 is of at least 2 carbon atoms.

Dependencies are inferred from the claim text.