Hair dye composition and process for using the same
First Claim
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1. An aqueous dye composition for dyeing hair which does not dye the skin comprising:
- (1) at least one water soluble dye precursor of the formula ##STR3## wherein R1, R2 can be the same or different and are;
H, alkyl or 1-4C, NH2, OH, COOR'"'"' wherein R'"'"' is alkyl of 1-4C or H, CONH2, halogen, OR" wherein R" is alkyl of 1-4C, CH2 OH, CH2 NH2, CONR'"'"'R" wherein R'"'"' and R" can be the same or different;
R3 is H or alkyl of 1-4C or COR";
R4, R5 can be the same or different and are;
H, alkyl of 1-4C, NH2, OH, COOH, CONH2, halogen, OR", NO2, SO3, HNR", or NR"R";
(2) an alkali metal or alkaline earth metal salt of iodate or periodate;
(3) at least one organic dye dispersing agent that is compatible with the dye precursor used and will not react with the iodate or periodate oxidant; and
(4) water.
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Abstract
The subject invention concerns novel dye compositions and a process for dyeing keratinous fibers, for example, hair, to give a pleasing and stable colored product. The dye composition is a novel combination of three elements to give a dye that, unexpectedly, has highly desirable dyeing properties. This unique combination comprises (1) a suitable organic compound to assist dye dispersion, (2) dye precursors including dopamine, D-dopa, L-dopa, D,L-dopa, or analogs thereof, and (3) iodate or periodate. Desired color variations can be obtained by the use of appropriate color modifiers.
28 Citations
25 Claims
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1. An aqueous dye composition for dyeing hair which does not dye the skin comprising:
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(1) at least one water soluble dye precursor of the formula ##STR3## wherein R1, R2 can be the same or different and are; H, alkyl or 1-4C, NH2, OH, COOR'"'"' wherein R'"'"' is alkyl of 1-4C or H, CONH2, halogen, OR" wherein R" is alkyl of 1-4C, CH2 OH, CH2 NH2, CONR'"'"'R" wherein R'"'"' and R" can be the same or different; R3 is H or alkyl of 1-4C or COR"; R4, R5 can be the same or different and are; H, alkyl of 1-4C, NH2, OH, COOH, CONH2, halogen, OR", NO2, SO3, HNR", or NR"R"; (2) an alkali metal or alkaline earth metal salt of iodate or periodate; (3) at least one organic dye dispersing agent that is compatible with the dye precursor used and will not react with the iodate or periodate oxidant; and (4) water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for dyeing hair which does not dye the skin and which comprises contacting hair with a dye composition comprising:
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(1) at least one water soluble dye precursor of the formula ##STR5## wherein R1, R2 can be the same or different and are; H, alkyl of 1-4C, NH2, OH, COOR'"'"' wherein R'"'"' is alkyl of 1-4C or H, CONH2, halogen, OR" wherein R" is alkyl of 1-4C, CH2 OH, CH2 NH2, CONR'"'"'R" wherein R'"'"' and R" can be the same or different; R3 is H or alkyl or 1-4C or COR"; R4, R5 can be the same or different and are; H, alkyl of 1-4C, NH2, OH, COOH, CONH2, halogen, OR", NO2, SO3, HNR", or NR"R"; (2) an alkali metal or alkaline earth metal salt of iodate or periodate; (3) at least one organic dye dispersing agent that is compatible with the dye precursor used and will not react with the iodate or periodate oxidant; and (4) water for about 20 min to about 60 min, and rinsing the dyed hair. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification