Hair dyeing process with aminoalkylthio substituted...

Details Hair dyeing process with aminoalkylthio substituted... Hair dyeing process with aminoalkylthio substituted...

A - Human Necessities

61

K

A61K 8/19 (2006.01) A61K 8/44 (2006.01) A61K 8/46 (2006.01) A61Q 5/10 (2006.01) A61K 7/13 (1990.01)

Patent

CA 2137866

A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising an aminoethanethio substituted dihydroxybenzene and a periodate, iodate, ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from the group consisting of direct dyes, primary intermediates, couplers, cysteine, dopa species and mixtures thereof, additionally containing a buffer to maintain the pH in the range from 2 to 11 during the oxidation reaction; and removing the aqueous reaction medium from the hair within about 5 to 50 minutes following such application; and compositions and kits for practicing such processes. The reaction medium may be formed by simultaneous addition of the dihydroxybenzene and the oxidant to the hair or by addition of the dihydroxybenzene followed addition of the oxidant.

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