Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2001-12-21
2004-07-06
Cupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S410000, C008S412000, C008S421000, C008S509000, C008S515000, C008S558000, C008S584000
Reexamination Certificate
active
06758866
ABSTRACT:
BACKGROUND OF INVENTION
It is desirable for hair coloring compositions to afford good color deposition. A problem with such compositions is that they must achieve deposition of a large amount of colorant and achieve an even color from root to tip of the hair fiber. It is an object of the present invention to provide a novel means for improving hair color deposition from hair coloring compositions.
A publication which is related to the field of this invention is as follows: EP 1 048290-A2 discloses oxidative, hair coloring compositions which color and condition hair, requiring lesser amounts of dye concentrations due to the presence of certain amphoteric, quaternized, conditioning polymers. The polymers contain repeating units from acrylic acid and methacrylamidopropyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, or a mixture thereof.
U.S. Pat. No. 6,203,578 discloses the use of linear or cyclic silicon compounds containing at least one chromophoric group of quinone or azo type as direct dyes in dye compositions intended for dyeing human keratin fibres and in particular the hair. The invention also relates to novel silicon compounds and dye compositions containing them, as well as to the direct dyeing process. The compositions disclosed herein can contain sequestering agents.
U.S. Pat. No. 6,010,541 discloses an oxidation dye composition for keratin fibers, and in particular for human keratin fibers such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation dye precursor and optionally one or more couplers, characterized in that it also comprises a nonionic amphiphilic polymer containing at least one fatty chain and at least one hydrophilic unit, and the invention also relates to the processes and dyeing devices using the said oxidation dye composition. The compositions disclosed herein can contain sequestering agents.
SUMMARY OF THE INVENTION
The present invention relates to permanent hair coloring compositions which comprise non-nitrogenous chelating agents such as polyphosphates or hydroxycarboxylates. Surprisingly, it has been found that hair coloring compositions which contain these chelators afford better color deposition on hair and cause color to be deposited more evenly on bleached, damaged, virgin hair than if the conventional EDTA is used.
The compositions of the present invention comprise:
(A) non-nitrogenous chelating agents selected from the group consisting of polyphosphate; phosphonates; hydroxycarboxylates; polyacrylates and its copolymer; zeolite; and mixtures thereof;
(B) an oxidative dye primary intermediate; and
(C) an oxidative dye coupler; and
(D) water.
The present invention also relates to a method for coloring hair which comprises contacting said hair with a composition of the invention.
DETAILED DESCRIPTION OF THE INVENTION
As used herein, % means weight %, unless otherwise indicated. As used herein the term chelator or chelating agent means a molecule that can form coordinate bonds to a single metal atom-that is, it is a sequestering agent. As used herein the term non-nitrogenous chelator or chelating agent means a molecule that is a chelating agent and that has no nitrogen. Preferred chelators or chelating agents mean a molecule that lacks an aminocarboxylic or an aminophosphonic acid group moiety. The compositions of the invention can be made by known methods or by methods that are analogous to known methods. The compositions of the present invention can be made from known starting materials or from starting materials that are analogous to known starting materials.
The compositions of the present invention comprise:
(A) a non-nitrogenous chelating agent selected from the group consisting of polyphosphates, phosphonates, hydroxycarboxylates, polyacrylates, zeolites and mixtures thereof;
(B) at least one oxidative dye primary intermediate; and
(C) at last one oxidative dye coupler; and
(D) water.
The invention also relates to a hair coloring mixture comprising:
(A) about 0.01 to about 3% of a non-nitrogenous chelating agent selected from the group consisting of polyphosphates, phosphonates, hydroxycarboxylates, polyacrylates, zeolites and mixtures thereof;
(B) about 0.01 to about 5% oxidative dye primary intermediate; and
(C) about 0.01 to about 5% oxidative dye coupler; and
(D) water.
The invention also relates to a hair coloring mixture comprising a mixture of:
(A) about 0.01 to about 3% of a non-nitrogenous chelating agent selected from the group consisting of polyphosphates, phosphonates, hydroxycarboxylates, polyacrylates, zeolites and mixtures thereof;
(B) about 0.01 to about 5% oxidative dye primary intermediate; and
(C) about 0.01 to about 5% oxidative dye coupler; and
(D) water.
The invention also relates to compositions as described above, which contain a non-amino chelating agent.
Sequestering agents have been used in hair colorant and developer as stabilizing agents. Because trace amount of metal may destabilize the colorant in a hair coloring composition, aminocarboxylic acids such as ethylenediamine tetraacetic acid (EDTA) have been traditionally used as sequestering agents in hair coloring compositions. It has been unexpectedly found that non-amino containing chelates such as polyphosphates and hydroxycarboxylates give better color deposition than that of amine containing chelates such as EDTA.
What follows now is a description of each of the ingredients which may be employed in the hair coloring compositions of the invention.
Non-Nitrogenous Chelating Agents and Non-Amino Chelating Agents
It has been unexpectedly discovered that certain chelating agents make hair colorant and hair dyeing compositions more efficient. These chelating agents make color deposition heavier and darker with the same amount of dye as compared to other chelating agents. Hence, these chelating agents allow the same target shade to be matched through the use of a lesser amount of dye. This allows for reduction in the cost of a hair coloring formula and/or reduces the exposure of consumers to these dyes, which may, for example, be allergens. As noted above, the present invention is related to a hair coloring composition comprising: a non-nitrogenous chelating agent selected from the group consisting of polyphosphates, phosphonates, hydroxycarboxylates, polyacrylates, zeolites and mixtures thereof.
Particular chelating agents that may be useful in the present invention for the purpose of enhancing dye color include polyphosphates such as pentasodium tripolyphosphate (STPP), potassium diphosphate, potassium pyrophosphate etc; non-amino containing phosphonic acid or its salts such as 1-hydroxyethane-1,1-diphosphonic acid (Dequest 2010, Astaris LLC); hydroxycarboxylates such as citric acid, gluconic acid, tartaric acid, 1,2,3,4-cyclopentanetetra-carboxylic acid, O-carboxymethyl tartronic acid, O-carboxymethyloxysuccinic acid, oxidized carbohydrates and its salts etc; polyacrylates and their copolymers such as polyacrylic acid, acrylic acid/maleic acid copolymer, acrylic acid and sulfonated copolymer, polyaspartic polymer, poly(methylvinyl ether/maleic acid). Another class of useful chelating agents include ion exchangers such as Zeolites which are crystalline oxides of aluminum and silicon.
A non-amino chelator as described above, may optionally be mixed with a small amount of amino containing chelates without significantly reducing the color intensity achieved by the hair coloring compositions of the invention. Amino containing chelates can be aminocarboxylates such as nitrilotriacetate (NTA), ethylene diamine tetraacetate (EDTA), diethylene triamine pentaacetate (DTPA), and hydroxyethyl ethylene diamine triacetate (HEDTA), aminophosphonates such as amino trimethylene phosphate, ethylene diamine tetramethylene phosphonate.
Hair Colorants
Oxidative Hair Coloring Agents (Oxidative Dye Primary Intermediates)
Permanent hair dye compositions as described herein are compositions, which once applied to the hair are substantially resistant to wash-out. Wash-out as described herein is the process by which hair color is
Bartolone John Brian
Chan Alexander C
Wis-Surel Gabriela
Yang Jiang
Cupta Yogendra N.
Elhilo Eisa
Honig Milton L.
Unilever Home & Personal Care USA Division of Conopco, Inc.
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