Particular quinone direct dyes, dye composition comprising at least one such dye, implementation process therefor and use thereof
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United States of America Patent
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Jan 12, 2016
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app pub date -
Dec 13, 2012
filing date -
Dec 13, 2011
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Abstract
The present invention relates to quinone direct dyes of formula (I) below, organic or mineral acid or base salts thereof, tautomeric forms, optical isomers or geometrical isomers thereof and/or solvates thereof: and also to the use thereof for dyeing keratin fibers, in particular human keratin fibers such as the hair. The invention also relates to a composition for dyeing keratin fibers, comprising such direct dyes in a suitable dyeing medium. Similarly, a subject of the present invention is a process for dyeing keratin fibers, using the said dye composition.
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