C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 50/18 (2006.01) C09B 1/16 (2006.01) C09B 1/28 (2006.01) C09B 67/22 (2006.01)
Patent
CA 2292670
The invention provides compositions and methods for the direct dyeing of keratinous fibers, with particular regard to human hair on the head. The compositions of the invention contain novel anthraquinone mixtures in which each of the component anthraquinones has similar polarities. Compared with the known, commercially-available anthraquinone hair dye colorant, Disperse Blue 3 (DB 3), which comprises a mixture of anthraquinones having dissimilar polarities, the anthraquinone mixtures of the present invention surprisingly and advantageously were found to color hair more intensely and also to synergize to a greater extent with other anthraquinones, such as Disperse Violet 1 (DV 1), when used in hair dye formulations. The novel compound 1-[(2- hydroxyethyl)amino]-4-[(2-hydroxypropyl)amino]-9,10-anthracenedione is also disclosed.
L'invention concerne des compositions et des méthodes qui permettent de colorer directement les fibres de kératine, notamment les cheveux. Ces compositions contiennent de nouveaux mélanges d'anthraquinones dans lesquels tous les composants anthraquinones ont une polarité similaire. Par comparaison avec les colorants capillaires à base d'anthraquinone existants dans le commerce, le bleu dispersé (DB3), qui renferme un mélange d'anthraquinones ayant des polarités différentes, les mélanges d'anthraquinones de la présente invention se sont avérés, étonnamment et avantageusement, colorer les cheveux avec plus d'intensité et présenter une meilleure synergie avec les autres anthraquinones, telles que le violet dispersé (DV1), quand ils sont utilisés dans des formulations de colorants capillaires. L'invention concerne également un nouveau composé, le 1-[(2-hydroxyéthyl)amino]-4-[(2-hydroxypropyl)amino]-9,10-anthracènedione.
Bristol-Myers Squibb Company
Clairol Incorporated
Gowling Lafleur Henderson Llp
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