Symmetrical and asymmetrical disazo compounds containing a bis-(nitro-aryloxy)alkane middle component

Claim 1

A disazo compound of the formula ##STR14## or a mixture thereof, in which n is a number from 1 to 10; Z is hydrogen or halogen, alkyl or alkoxy of up to 4 carbon atoms, or nitro; and K represents identical or different radicals of the formula ##STR15## in which x 1 and x 2 are hydrogen, fluorine, chlorine or bromine, or alkyl or alkoxy of 1 to 6 carbon atoms, or x 1 and x 2 , together with the phenyl moiety to which they are attached, form a naphthalene, benzimidazolone or benzoxazolone ring; y 1 is hydrogen, fluorine, chlorine, bromine, or alkyl, alkoxy or carbalkoxy of 1 to 6 carbon atoms in the alkyl moiety, cyano, trifluoromethyl, alkanoylamino with up to 5 carbon atoms, benzoylamino, benzoylamino substituted by chlorine or alkyl or alkoxy of up to 4 carbon atoms, or a group of the formula --X--NR'--R", in which X is CO or SO 2 , R' is hydrogen or alkyl of 1 to 4 carbon atoms and R" is hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; R 1 is alkyl of 1 to 6 carbon atoms, carboxyl or carbalkoxy with 1 to 6 carbon atoms in the alkyl moiety; z 1 and z 2 are hydrogen, fluorine, chlorine or bromine or alkyl or alkoxy of 1 to 6 carbon atoms, or z 1 and z 2 together with the phenyl moiety to which they are attached from a naphthyl moiety; and z 3 is hydrogen, fluorine, chlorine or bromine, alkyl or alkoxy of 1 to 6 carbon atoms or a group of the formula --N--NR'--R", in which X, R' and R" are as defined above.