Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2001-12-04
2004-04-20
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S407000, C008S410000, C008S412000, C008S424000, C008S435000, C008S594000, C008S596000, C008S600000, C008S601000, C008S628000, C008S629000
Reexamination Certificate
active
06723136
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a colouring composition for keratin fibres, a process for obtaining such a colouring composition and its use for the coloration of keratin fibres.
More particularly, the present invention relates to a colouring composition for hair, which after application to the latter, gives an original colour tint and makes it possible to increase the retention of the colour on the hair.
DISCUSSION OF THE BACKGROUND
In the field of the coloration of keratin fibres such as hair, eyelashes, eyebrows and bristles, the use of dye compositions containing oxidation bases such as p-phenylene diamines and ortho- or para-aminophenols to dye the keratin fibres, in particular human hair is well-known.
It is also known that the tints obtained with these oxidation bases can be varied by combining them with couplers, also called coloration modifiers, such as aromatic meta-diamines, meta-aminophenols, meta-diphenols and dihydroxyindole derivatives.
The revelation of the coloration of these compositions requires the use of an oxidising agent selected from, for example, hydrogen peroxide, urea peroxide, alkali metal bromates, persalts, such as the perborates and the persulfates, hydrogen peroxide being particularly preferred.
Enzymatic catalysts are also used to activate the coloration of colouring material precursors. Thus, the coloration of polyphenols is activated by oxidation in the presence of natural polyphenol oxidase. As an example, catechol in the presence of natural polyphenol oxidase gives an orangeish yellow colour and dihydroxyphenylalanine (L-DOPA) gives melanine. The principal advantage of these enzymatic catalysts consists in the production of colour pigments and original tints without the use of oxidants. However, the major disadvantage of this coloration process lies in the severe limitations to the use of enzymes on account of fears raised as to their harmlessness, their stability in the compositions, their reproducibility, their price and their often necessary immobilisation.
These compositions give results which are not totally satisfactory as far as retention and colour are concerned.
It is hence desirable to have available dye compositions which, as hair colouring materials give excellent results from the point of view of both colour and retention and for which it is possible to do without the use of conventional oxidising agents, in particular hydrogen peroxide or the use of enzymatic systems for the revelation of coloration.
SUMMARY OF THE INVENTION
The applicant has found, quite surprisingly, that it is possible to attain this goal with a composition which comprises a colouring material precursor selected from the compounds containing at least one aromatic ring having at least two hydroxyl groups borne by two adjacent carbon atoms of the aromatic ring, an oxidation base of the para or ortho type selected from the aromatic amines, and a chemical catalytic system comprising a first constituent selected from the salts and oxides of Mn(II) and/or Zn(II) and their mixtures, and a second constituent selected from the alkali hydrogen carbonates, the alkaline earth hydrogen carbonates and their mixtures.
Thus, the chemical catalytic system present in the composition of the invention behaves like a pseudo-oxidase capable of mimicking the oxidase activity without the disadvantages associated with the use of an enzymatic system.
In particular, this coloration composition, designed in particular for the coloration of keratin fibres, does not require the presence of enzymes or hydrogen peroxide.
The present invention also relates to a process for revealing the coloration of a slightly coloured or colourless base composition comprising at least one colouring material precursor by oxidation and at least one oxidation base to tint the coloration obtained which consists of adding to the base composition a purely chemical catalytic system and of placing the base composition supplemented with the catalytic system in the presence of a medium containing or generating oxygen.
The present invention also relates to a coloration process for keratin fibres using a composition such as that defined above.
Finally, the present invention relates to packaged and galenic forms of the colouring composition or constituents of the colouring composition according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
The composition for the coloration of the skin and/or keratin fibres according to the invention comprises, in a physiologically acceptable medium, an efficacious quantity of at least one colouring material precursor selected from the compounds containing at least one aromatic ring having at least two hydroxyl groups (OH) borne by two adjacent carbon atoms of the aromatic ring, an efficacious quantity of at least one oxidation base of the para or ortho type selected from the aromatic amines, and an efficacious quantity of a catalytic system comprising a first constituent selected from the salts and oxides of Mn(II) and/or Zn(II) and their mixtures, and a second constituent selected from the alkali hydrogen carbonates, the alkaline earth hydrogen carbonates and their mixtures, the proportions of the first constituent and the second constituent being such that:
[
M
n
(
I
I
)
]
[
H
C
O
3
]
≤
1
with
[
M
n
(
I
I
)
]
≠
0
[
Z
n
(
I
I
)
]
[
H
C
O
3
]
≤
1
with
[
Z
n
(
I
I
)
]
≠
0
[
M
n
(
I
I
)
+
[
Z
n
(
I
I
)
]
[
H
C
O
3
]
≤
1
with
[
M
n
(
I
I
)
and
[
Z
n
(
I
I
)
]
≠
0
where [Mn(II)], [Zn(II)] and [HCO
3
] respectively represent the molar concentrations of Mn(II), Zn(II) and HCO
3
in the composition. In general, the ratio
[
M
n
(
I
I
)
]
[
H
C
O
3
]
varies from 10
−5
to 10
−1
, and preferably from 10
−3
to 10
−2
and is typically of the order of 5×10
−3
.
In the case where a salt or an oxide of Zn(II) alone is used, the ratio
[
Z
n
(
I
I
)
]
[
H
C
O3
]
is usually of the order of 10 to 100 fold higher than when a salt or oxide of Mn(II) alone is used.
Typically, this ratio is 10
−4
or more, preferably 10
−3
or more, and preferably of the order of 5×10
−1
.
In the case of a mixture of Mn(II) and Zn(II), the ratio usually varies from 10
−5
, to 10
−1
, preferably 10
−3
to 10
−2
, a higher ratio being selected when the proportion of Zn(II) in the mixture is increased.
Usually, the molar concentration of Mn(II), Zn(II) or Mn(II)+Zn(II) in the final composition varies from 10
−3
to 10 mM/l, and preferably from 10
−2
to 1 mM/l.
When one or more salts or oxides of Mn(II) only is/are used, the molar concentration of Mn(II) in the final composition is typically 10
−3
to 10
−1
mM/l, and preferably from 10
−2
to 10
−1
mM/l.
Preferably, when the catalytic system contains one or more salts or oxides of Zn(II) only, the concentration of Zn(II) in the final composition is 5×10
−2
to 10 mM/l, and preferably from 5×10
−1
to 1 mM/l.
Of the salts of Mn(II) and Zn(II) suitable for the present invention, mention may be made of chloride, fluoride, iodide, sulfate, phosphate, nitrate and perchlorate, carboxylic acid salts and their mixtures.
As examples, mention may be made of manganese chloride, manganese carbonate (for example rhodochrosite), Mn(II) difluoride, Mn(II) tetrahydrate acet
Elhilo Eisa
Gupta Yogendra N.
L'Oreal
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