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US 5,486,629 AGranted
Direct dyes having a quaternary center with a long aliphatic chain
AssigneeClairol Incorporated
InventorsAlexander Chan, Yuh-Guo Pan
Life of this patent
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Abstract
Direct dyes having a quaternary center with a long aliphatic chain, compositions containing those dyes, and the process of using them to dye hair are disclosed. These dyes have a higher affinity for hair and are more shampoo stable than conventional direct dyes, and produce pleasing uniform dyeing.
Claims1
An aminoanthraquinone dye compound of the formula (I):
- Q-NR.sub.6 (CH.sub.2).sub.n -N.sup.+ R.sub.1 R.sub.2 R.sub.3 X.sup.-
- or a cosmetically acceptable salt thereof, wherein
- Q is an anthraquinone of the formula (V):
- ##STR12## n is 2 to 12;
- p, q, x, and y are, independent of each other, 0, 1, or 2;
- R is hydrogen, C.sub.1-6 alkyl, C.sub.1-6 hydroxyalkyl, C.sub.1-6 polyhydroxyalkyl, halogen, C.sub.1-6 alkoxy, halogenated C.sub.1-3 alkyl, polyhalogenated C.sub.1-3 alkyl, CN, amide, or COOH;
- R.sub.1 is C.sub.1-6 alkyl, C.sub.1-6 hydroxyalkyl, or C.sub.1-6 polyhydroxyalkyl;
- R.sub.2 is C.sub.1-6 alkyl, C.sub.1-6 hydroxyalkyl, or C.sub.1-6 polyhydroxyalkyl;
- R.sub.3 is a C.sub.8-22 aliphatic chain;
- R.sub.6 is hydrogen, C.sub.1-6 alkyl, C.sub.1-6 hydroxyalkyl, or C.sub.1-6 polyhydroxyalkyl;
- and
- X.sup.- is a monovalent or divalent anion.
9 more elements
Dependencies are inferred from the claim text.