Azo dyes derived from 3-amino pyridine in hair dye compositions

Details Azo dyes derived from 3-amino pyridine in hair dye compositions Azo dyes derived from 3-amino pyridine in hair dye compositions

1975-09-26

1977-05-24

Rosen, Sam

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 10, 8 11, 8 32, 8 41R, 260156, 424DIG1, 424DIG2, 424 71, A61K 713

Patent

active

040253015

ABSTRACT:
A composition for dyeing hair comprises in a cosmetic vehicle at least one dye compound of the formula ##STR1## wherein B is selected from the group consisting of ##STR2## and ##STR3## wherein R is lower alkyl containing 1-4 carbon atoms, R.sub.1 is selected from the group consisting of hydrogen, lower alkyl containing 1-4 carbon atoms, lower alkoxy containing 1-4 carbon atoms and chlorine,
R.sub.2 is selected from the group consisting of hydrogen, methyl and methoxy,
R.sub.4 is selected from the group consisting of hydrogen, methyl, chlorine, nitro, amino and acetylamino,
R.sub.3 is hydrogen or together with R.sub.4 forms an unsaturated 6 membered ring carrying a hydroxy substituent chelated with one of the nitrogen atoms of the azo link, and ##STR4## where R.sub.5 is selected from the group consisting of hydrogen, -CH.sub.3, -C.sub.2 H.sub.5 and .beta.-hydroxyethyl, and R.sub.6 is selected from the group consisting of hydrogen, --CH.sub.3, --C.sub.2 H.sub.5, .beta.-hydroxyethyl, phenyl and -CH.sub.2 SO.sub.3 N.sub.a,
With the proviso that when B is ##STR5## the anion X.sup.- associated with the quaternized nitrogen atom is the anion residue of a member selected from the group consisting of organic acid and mineral acid, said composition having a pH ranging from 3 to 11 and said compound being present in an amount ranging from 0.001 to 1 percent by weight of said composition.

REFERENCES:
patent: 2864813 (1958-12-01), Bossard et al.
patent: 2893816 (1959-07-01), Tsang et al.
patent: 3051697 (1962-08-01), Lewis et al.
patent: 3117116 (1964-01-01), Randvere
patent: 3118871 (1964-01-01), Brody et al.
patent: 3249597 (1966-05-01), Dehn et al.
patent: 3312681 (1967-04-01), Lewis
patent: 3393190 (1968-07-01), Stright

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