Hair dye composition and process for using the same

Claim 2

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 R 1 , R 2 can be the same or different and are: H, alkyl or 1-4C, NH 2 , OH, COOR' wherein R' is alkyl of 1-4C or H, CONH 2 , halogen, OR" wherein R" is alkyl of 1-4C, CH 2 OH, CH 2 NH 2 , CONR'R" wherein R' and R" can be the same or different; R 3 is H or alkyl of 1-4C or COR"; R 4 , R 5 can be the same or different and are: H, alkyl of 1-4C, NH 2 , OH, COOH, CONH 2 , halogen, OR", NO 2 , SO 3 , 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.

Claim 3

A dye composition, according to claim 1, wherein said dye precursor has the formula ##STR4## wherein R 1 , R 2 can be the same or different and are: H, CH 3 , C 2 H 5 , OH, or halogen; R 3 is H, CH 3 or C 2 H 5 ; R 4 , R 5 can be the same or different and are as defined in claim 1.

Claim 4

A dye composition, according to claim 1, wherein said dye precursor is dopamine, D-dopa, L-dopa, or D,L-dopa.

Claim 5

A dye composition, according to claim 1, wherein said dye dispersing agent is selected from the group consisting of 2-isopropyl 5-methyl phenol, acetophenone, 4-ethyl acetophenone, cyclohexanone, 2,4-dimethyl acetophenone, 3,5-dimethyl cyclohexanone, 4-methyl cyclohexanone, ethylbenzoate, benzyl acetate, benzyl propionate, benzyl butyrate, cyclohexanol, 2-methyl cyclohexanol, furfuryl alcohol, hexanol, 2-methyl-1-pentanol, benzyl alcohol, α,α,dimethyl benzyl alcohol, α-propyl benzyl alcohol, DL-α methyl benzyl alcohol, 2-benzyloxyethanol, 2-benzyloxypropanol, 2-benzyloxybutanol, ethylene glycol phenyl ether, butyrolactone, 1,2-propylene glycol carbonate, ethylene carbonate, tetramethylene sulfone, butadiene sulfone, tetrahydro thiophene dioxide, 1-n-dodecylazacycloheptan-2-one, and ethylene glycol sulfite.

Claim 6

A dye composition, according to claim 1, wherein said hair is gray or white hair.

Claim 7

A dye composition, according to claim 1, wherein said dye dispersing agent is present at a concentration of about 0.1 to about 30 wt/vol%; said dye precursor is at a concentration of about 0.1 to about 10 wt/vol% to the dye composition; and said alkali metal or alkaline earth metal salt of iodate or periodate is at a concentration of about 0.1 to about 5 wt/vol%.

Claim 8

A dye composition, according to claim 1, wherein a thickener is present to minimize dripping from the hair.

Claim 9

A dye composition, according to claim 7, wherein said thickener is polyethylene glycol-150 distearate.

Claim 10

A dye composition, according to claim 1, wherein a color modifier, or a mixture thereof, selected from the group consisting of 4-methylcatechol, 3,4-dihydroxybenzoic acid, 3,4-dihydroxybenzaldehyde, 4-bromocatechol, catechol, 4-methoxycatechol, m-aminophenol, resorcinal, cysteine, glutathione, mercaptoacetic acid, and lysine is present.

Claim 11

A dye composition, according to claim 9, wherein said color modifier is catechol or cysteine.

Claim 12

A dye composition, according to claim 1, wherein potassium or ammonium persulfate is present.

Claim 13

A dye composition, according to claim 1, wherein a stabilizer is present if the dopamine dye precursor is in solution.

Claim 14

A dye composition, according to claim 1, wherein said dye dispersing agent is benzyl alcohol.

Claim 15

A dye composition, according to claim 1, wherein said dye dispersing agent is ethylene carbonate.

Claim 16

A process for dyeing hair which does not dye the skin and which comprises contacting hair with a dye composition comprising: (1) at least one water soluble dye precursor of the formula ##STR5## wherein R 1 , R 2 can be the same or different and are: H, alkyl of 1-4C, NH 2 , OH, COOR' wherein R' is alkyl of 1-4C or H, CONH 2 , halogen, OR" wherein R" is alkyl of 1-4C, CH 2 OH, CH 2 NH 2 , CONR'R" wherein R' and R" can be the same or different; R 3 is H or alkyl or 1-4C or COR"; R 4 , R 5 can be the same or different and are: H, alkyl of 1-4C, NH 2 , OH, COOH, CONH 2 , halogen, OR", NO 2 , SO 3 , 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.

Claim 17

A process for dyeing hair which does not dye the skin and which comprises contacting hair with a dye composition comprising: (1) at least one water soluble dye precursor of the formula ##STR5## wherein R 1 , R 2 can be the same or different and are: H, alkyl of 1-4C, NH 2 , OH, COOR' wherein R' is alkyl of 1-4C or H, CONH 2 , halogen, OR" wherein R" is alkyl of 1-4C, CH 2 OH, CH 2 NH 2 , CONR'R" wherein R' and R" can be the same or different; R 3 is H or alkyl or 1-4C or COR"; R 4 , R 5 can be the same or different and are: H, alkyl of 1-4C, NH 2 , OH, COOH, CONH 2 , halogen, OR", NO 2 , SO 3 , 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.

Claim 18

A process, according to claim 15, wherein said dye dispersing agent is selected from the group consisting of 2-isopropyl 5-methyl phenol, acetophenone, 4-ethyl acetophenone, cyclohexanone, 2,4-dimethyl acetophenone, 3,5-dimethyl cyclohexanone, 4-methyl cyclohexanone, ethylbenzoate, benzyl acetate, benzyl propionate, benzyl butyrate, cyclohexanol, 2-methyl cyclohexanol, furfuryl alcohol, hexanol, 2-methyl-1-pentanol, benzyl alcohol, α,α,dimethyl benzyl alcohol, α-propyl benzyl alcohol, DL-α methyl benzyl alcohol, 2-benzyloxyethanol, 2-benzyloxypropanol, 2-benzyloxybutanol, ethylene glycol phenyl ether, butyrolactone, 1,2-propylene glycol carbonate, ethylene carbonate, tetramethylene sulfone, butadiene sulfone, tetrahydro thiophene dioxide, 1-n-dodecylazacycloheptan-2-one, and ethylene glycol sulfite.

Claim 19

A process, according to claim 15, wherein said dye composition comprises (1) said dye precursor at a concentration of about 0.1 to about 10 wt/vol% to the dye composition; (2) said alkali metal or alkaline earth metal salt of an iodate or periodate at a concentration of about 0.1 to about 5 wt/vol%; and (3) said dye dispersing agent at a concentration of about 0.1 to about 30 wt/vol%.

Claim 20

A process, according to claim 15, wherein said dye precursor is dopamine, D-dopa, L-dopa, or D,L-dopa.

Claim 21

A process, according to claim 15, wherein a thickener to minimize dripping from the hair is added to the dye composition.

Claim 22

A process, according to claim 19, wherein said thickener is polyethylene glycol-150 distearate.

Claim 23

A process, according to claim 15, wherein a color modifier, or a mixture thereof, selected from the group consisting of 4-methylcatechol, 3,4-dihydroxybenzoic acid, 3,4-dihydroxybenzaldehyde, 4-bromocatechol, catechol, 4-methoxycatechol, m-aminophenol, resorcinol, cysteine, glutathione, mercaptoacetic acid, and lysine is added to the dye composition.

Claim 24

A process, according to claim 21, wherein said color modifier is catechol or cysteine.

Claim 25

A process, according to claim 15, wherein a stabilizer is added to the dye composition if the dopamine dye precursor is in solution.

Claim 26

A process, according to claim 15, wherein said dye dispersing agent is benzyl alcohol.

Claim 27

A process, according to claim 15, wherein said dye dispersing agent is ethylene carbonate.