Diazamerocyanines for dyeing keratinous fibers

Claim 1

A dye composition for dyeing keratinous fibers comprising an aqueous solution having a pH of between about 3 and about 8, of from about 0.0001 to about 5% by weight of at least one diazamerocyanine dye, including the mesomorphic forms thereof, having the formula A=N--N=B wherein A represents a nitrogen heterocycle selected from the group consisting of ##SPC80## wherein R represents a member selected from the group consisting of lower alkyl having 1-4 carbon atoms and phenyl; X represents a member selected from the group consisting of sulfur, --NR'--, wherein R' represents lower alkyl having 1-4 carbon atoms, --CR' 9 =CR' 10 wherein R' 9 is hydrogen, alkyl of 1 to 4 carbon atoms or cyano and wherein R' 10 is hydrogen or alkyl of 1 to 4 carbon atoms, and --C(R")(R")--, wherein each R" is independently selected from the group consisting of hydrogen and lower alkyl having 1-4 carbon atoms; Z represents a member selected from the group consisting of --CH=CH-- and --NR'", wherein R'" represents lower alkyl having 1-4 carbon atoms, R 7 represents a member selected from the group consisting of hydrogen, lower alkyl having 1-4 carbon atoms, cyano and phenyl, R 8 represents a member selected from the group consisting of hydrogen, halogen and lower alkyl having 1-4 carbon atoms, provided that R 7 and R 8 , when taken together with the carbon atoms to which they are linked, represent benzene; B represents a member selected from the group consisting of i. 1-phenyl-3-methyl-5-pyrazolone, ii. a cycle of the formula ##SPC81## wherein Y represents a member selected from the group consisting of oxygen and ##EQU1## wherein R 1 and R 2 each independently represent a member selected from the group consisting of hydrogen, lower alkyl having 1-4 carbon atoms, hydroxyalkyl having 1-4 carbon atoms and phenyl, and Z - is an anion derived from a member selected from the group consisting of an inorganic acid and an organic acid, R 3 represents a member selected from the group consisting of hydrogen, lower alkyl, lower alkoxy and phenylcarbamyl, R 4 and R 6 each independently represent a member selected from the group consisting of hydrogen, lower alkyl having 1-4 carbon atoms and lower alkoxy having 1-4 carbon atoms, and R 5 represents a member selected from the group consisting of hydrogen, halogen, alkyl of 1 to 4 carbon atoms, nitro, amino, acetylamino; R 5 and R 6 together with the carbon atoms to which they are attached being benzene or hydroxybenzene, iii. a cycle having the formula ##SPC82## wherein R 1 and R 9 , together with the nitrogen and carbon atoms to which they are attached, represent morpholine in which case R 10 is hydrogen and R 2 represents a member selected from the group consisting of hydrogen and lower alkyl having 1-4 carbon atoms, and wherein R 2 and R 10 , when taken together with the nitrogen and carbon atoms to which they are attached, represent morpholine in which case R 9 is hydrogen and R 1 represents a member selected from the group consisting of hydrogen, lower alkyl having 1-4 carbon atoms and acyl having 2 to 5 carbon atoms, and R 11 represents a member selected from the group consisting of hydrogen and lower alkyl having 1-4 carbon atoms, and iv. a cycle having the formula ##SPC83## wherein R 1 , r 2 , r 9 , r 10 and R 11 have the meaning given above and X - represents an anion derived from a member selected from the group consisting of an inorganic acid and an organic acid.