Quaternary ammonium substituted benzothiazolylphenyl azo pyrimidine dyes

Claim 1

A benzthiazole compound of the formula ##STR36## in which KK is the radical of a pyrimidine coupling component of the formula ##STR37## in which X and Z independently of one another are O or NH, Y is the group O, NH, S or N--CN, U and V independently of one another are hydrogen, C 1 -C 4 -alkyl which is unsubstituted or substituted by hydroxy or phenyl which is unsubstituted or substituted by C 1 -C 4 alkyl, halogen or C 1 -C 4 alkoxy, or one of the radicals U or V is CN and the other is hydrogen, X 1 is C 1 -C 4 -alkyl, Y 1 is hydrogen, NH--C 1 -C 4 -alkyl, NH-phenyl, N--(C 1 -C 4 -alkyl) 2 , phenyl or C 1 -C 4 -alkyl and V 1 is hydrogen, C 1 -C 4 -alkyl which is unsubstituted or substituted by hydroxy or phenyl which is unsubstituted or substituted by C 1 -C 4 alkyl, halogen or C 1 -C 4 alkoxy, W is a radical of the formula --CH 2 --NH--CO--C 1 -C 4 -alkyl-Q.sup.⊕ An.sup.⊖ in which An is an anion and Q is a quaternary radial of the formula ##STR38## in which R 1 to R 6 independently of one another are C 1 -C 4 -alkyl which is unsubstituted or substituted by hydroxy, or the radicals R 1 and R 2 , or R 3 and R 4 together with the N atom to which they are attached form a heterocyclic ring selected from morpholine, pyrrolidine, piperidine or piperazine, or R 3 and R 4 and R 5 , together with the N atom to which they are attached, form a heterocyclic ring selected from pyridinium which is unsubstituted or substituted by C 1 -C 4 alkyl or ##STR39## m is the number 1, 2 or 3 and n is the number 0 or 1, and in which the benzene radicals A, B and C independently are unsubstituted or are substituted by C 1 -C 4 alkyl.