A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
A61K 8/49 (2006.01) A61Q 5/10 (2006.01)
Patent
CA 2290098
The present invention concerns improved processes for dyeing keratinous fibers especially hair on the human scalp using a two-step oxidation process for the oxidation of the melanin precursors 5,6-dihydroxyindoline (DHIN), 5,6- dihydroxyindole (DHI), and derivatives thereof such as 5,6-dihydroxyindole-2- carboxylic acid (DHICA).
L'invention porte sur des procédés améliorés de teinture des fibres de kératine et spécialement des cheveux humains comportant une opération d'oxydation en deux étapes des précurseurs de la mélanine, la 5,6-dihydroxyindoline (DHIN) et la 5,6-dihydroxyindole (DHI), et de leurs dérivés tels que l'acide 5,6- dihydroxyindole-2-carboxylique (DHICA).
Prota Giuseppe
Wenke Gottfried
Bristol-Myers Squibb Company
Clairol Incorporated
Gowling Lafleur Henderson Llp
LandOfFree
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