Clairol Incorporated

Milos S Bil

Raymond Feinland

Sigmund Iscowitz

An autoxidizable hair preparation capable of coloring hair when applied thereto and exposed to the atmosphere comprising N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof and a triol selected from the group consisting of 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene. The preparation is applied at multiple spaced intervals of time until the desired color build-up is attained. Also prepares the composition by preforming a solution of the triol by storing the corresponding triacetate in acid solution for a period of time then adding the N,N-bis(2-hydroxyethyl)-p-phenylenediamine.

Autoxidizable hair dye containing preparations

Prepares 2-nitro-4-amino-N-phenylaniline by reacting 4-fluoro-3-nitroaniline at a temperature of at least about 140.degree.C and in a large molar excess of aniline e.g. molar ratio of aniline to 4-fluoro-3-nitroaniline being at least about 5:1.

Method for preparing 2-nitro-4-amino-N-phenylaniline

Compounds of formula: ##SPC1## Wherein W is ##EQU1## or ##EQU2## in which: (a) R.sub.4 and R.sub.5 are 5 identical or different and represent hydrogen, monovalent aliphatic, substituted or unsubstituted aryl, aralkyl and cycloalkyl, providing that not more than 1 of R.sub.4 or R.sub.5 is hydrogen, and (b) R.sub.3 is a divalent aliphatic radical.

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Forest Hills, NY, United States of America

Milos S Bil