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US 5,702,712 AGranted
Melanoquaternary compounds and their use as hair dyes and for skin treatment
AssigneeClairol Incorporated
InventorsGottfried Wenke, Giuseppe Prota
Life of this patent
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Abstract
Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products to color hair or treat skin are described.
Claims16
A water soluble compound having the formula:
- ##STR2## wherein M is a melanin residue,
- Y is --O-- or --NH,
- n is an integer from 1 to 20,
- R.sub.1, R.sub.2 R.sub.3 which may be the same or different are substituted or unsubstituted alkyl groups haing from 1 to 22 carbon atoms, the alkyl substituent being selected from the group consisting of halo, cyano, and nitro,
- m is the number of derivatized carboxyl groups in the melanin residue, and
- X is an anion.
3 more elements
A composition with a pH of from about 3 to about 10 for coloring hair or treating skin containing:
- (a) a compound having the formula:
- ##STR3## wherein M is a melanin residue,
- Y is --O-- or --NH,
- n is an integer from 1 to 20,
- R.sub.1, R.sub.2 and R.sub.3 which may be the same or different are substituted or unsubstituted alkyl groups having from 1 to 22 carbon atoms, the alkyl substituent being selected from the group consisting of halo, cyano, and nitro,
- m is the number of derivatized carboxyl groups in the melanin residue, and
- X is an anion,
- said compound (a) being present in the composition in an amount effective to color hair or treat skin, and
- (b) a cosmetically acceptable carrier.
6 more elements
A method of coloring hair which comprises contacting hair with an effective hair dyeing amount of a compound of the formula:
- ##STR4## wherein M is a melanin residue,
- Y is --O-- or --NH,
- n is an integer from 1 to 20,
- R.sub.1, R.sub.2 and R.sub.3 which may be the same or different are substitued or unsubstituted alkyl groups having from 1 to 22 carbon atoms, the alkyl substituent being selected from the group consisting of halo, cyano, and nitro,
- m is the number of derivatized carboxyl groups in the melanin residue, and
- X is an anion.
3 more elements
Dependencies are inferred from the claim text.