Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Reexamination Certificate
1999-11-24
2001-12-11
Jones, Dameron L. (Department: 1619)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
C424S401000, C424S047000, C424S070100, C514S880000, C514S944000, C514S945000
Reexamination Certificate
active
06328950
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject matter of the invention is a pigment-containing foam-forming gel and a device for producing a foam for temporarily coloring hair.
Production of color effects in hair is possible in many different ways. Dye precursors, which penetrate the hair and form a dyestuff there by an oxidation reaction, are used in oxidation hair dyeing compositions and methods. These dyes are permanent and cannot be washed from the hair without further effort. Other possibilities for dyeing hair include using the so-called direct-dyeing dye compounds. These direct-dyeing dye compounds are soluble organic dye compounds, which are absorbed by the hair. Dyed hair color dyed with these latter compounds is comparatively permanent and withstands several hair washings. Frequently color effects are not supposed to be permanent, but instead easily applied and similarly easily removed. One way to achieve this is the use of pigments. Pigments are insoluble colored materials, which can be deposited on the hair. Coloring effects with pigments frequently have the disadvantage that they have a reduced fastness to rubbing, i.e. a reduced friction fastness. There are a series of requirements for a pigment-containing hair treatment composition: a sufficient adherence of the pigment on the hair, as large as possible a friction fastness to mechanical rubbing, easy removability by hair washing and a high color brightness for the treated hair. Furthermore the applied treatment composition, especially when it is a matter of a styling and coloring composition, should impart good shapability and good hold to the hair. At the same time the composition should be in a pleasing and easily handled form for application.
A hair treatment composition in foam form for coloring the hair with a pigment is known from EP 0 172 713. This coloring composition is a foam-aerosol that is present in a non-viscous medium. This type of composition has the disadvantage that it must be shaken prior to use, since the undissolved pigment ingredients settle to the bottom of the aerosol container.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a gel for easily and quickly coloring hair, which is present in an easily handled form, which has a pleasing appearance and which fulfills the above-mentioned requirements while avoiding the above-described disadvantages.
It is another object of the present invention to provide a device for generating a foam for easily and quickly coloring hair, which includes an aerosol container with a foam dispenser and a foamable pigment-containing gel contained in the container.
These objects are attained according to the invention by a foamable, transparent, pigment-containing gel of the following composition.
According to the invention the pigment-containing foamable gel has the following content:
(A) from 35 to 98 percent by weight, preferably 55 to 95 percent by weight, water;
(B) at least one gel-forming thickener selected from the group consisting of thickeners that impart a yield to the composition;
(C) at least one pigment;
(D) at least one film-forming, hair-fixing polymer;
(E) at least one foam-producing surfactant; and
(F) at least one propellant, advantageously in combination with a suitable aerosol package and a device for foaming the gel. The concentration of the thickeners in this gel is selected so that, on the one hand, the viscosity of the gel is sufficiently reduced so that foaming of the gel is possible and, on the other hand, the yield point is at least large enough so that settling of the pigment is prevented. Polymers that are suitable for ingredient (B) include those polymers that impart a plastic or pseudo-plastic behavior to the composition. The rheological flow properties of the gel according to the invention are characterized by the existence of a yield point, which is preferably at least 3 Pascal, measured with a Haake rotation viscometer RV 12, measuring system PKV-0.5 at 30° C. and a linearly increasing shear rate of 0 to 100 s
−1
.
It is a matter of a temporary coloring-fixing composition, which fulfills the stated requirements for color brilliance, washability and friction fastness in the best way. The composition colors hair temporarily and fixes the hair at the same time. The hair resulting from treatment with this composition appears to have a high color brightness, it may appear lustrous, is washable at will and has a high friction fastness. The composition is present in a stable dispersible form with a pleasing appearance, which permits packaging in a transparent container, for example made from glass or transparent plastic, such as polyethylene terephthalate. The pigment particles are dispersed in a stable manner and do not precipitate or settle during a long storage. Thus the composition according to the invention need not be shaken to re-disperse the pigment prior to application and need not contain a ball for assisting the re-dispersal of the pigment particles. An additional advantage of the gel according to the invention is that the foam formed is stable over an exceptionally long time and however does not run off of the hair, however may be very easily worked into the hair, since it breaks down very easily when it is worked into the hair.
Preferably the gel has a measurable viscosity of 200 to 15,000 mPa s at 25° C. after exceeding the yield point. Especially the gel is a liquid gel with a viscosity of 300 to 6000, especially of 500 to 3000 mPa s at 25° C. The gel is characterized by a yield point. The yield point is selected according to the weight and surface area of the pigment particles so that it is at least as large as the pressure exerted by the pigment particles. Because of that property the pigment particles are prevented from settling.
The thickeners are preferably contained in the composition according to the invention in an amount of from 0.05 to 10 percent by weight, especially preferably from 0.1 to 4 percent by weight. The respective optimum concentration is selected according to the thickener type and the density of the pigments. Cross-linked or non-cross linked polyacrylic acid or polymethacrylic acid are suitable thickeners. Homopolymers of acrylic acid with a molecular weight of from 2,000,000 to 6,000,000, which are sold under the trademark Carbopol® of the BF Goodrich, USA, are among the thickeners that can be present in the composition according to the invention. Acrylic acid homopolymer with a molecular weight of 4,000,000 which is sold by BF Goodrich under the trademark Carbopol® can be contained in the composition according to the invention as thickener. Other thickeners include, for example, the acrylic acid homopolymer marketed by BF Goodrich under the tradename Carbopol® ETD 2001, or by Protex, France, under the trademark Modarez® V 600 PX; the copolymer made from acrylic acid and acrylamide with a molecular weight of 2,000,000 to 6,000,000 sold under the trademark Hostacerin® PN 73 by Hoechst, Germany, and the sclerotium gum sold under the trademark Amigel® by Alban Muller, Montreuil, France. Copolymers of acrylic acid or methacrylic acid, such as those sold under the trademarks Carbopol® and Pemulen® TR1 by BF Goodrich, USA, are especially preferred. Other suitable thickeners include guar gum, xanthan gum, bentonite and hectorite.
Besides the above-named thickeners, which impart a sufficient yield point to the composition, additional thickeners can be contained in the composition, which impart to the composition no sufficient yield point in the viscosity range typical for liquid gels. This type of thickeners are especially cellulose and cellulose derivative compounds, such as carboxymethtyl cellulose, cellulose ether and hydroxyalkyl celluloses, especially hydroxyethyl or hydroxypropyl cellulose.
If the thickeners contain acid groups, the acid groups are preferably at least partially neutralized with cosmetically compatible bases. Organic or inorganic bases suitable for cosmetic purposes are used as neutralization agents. Amino alcohols, such as aminomethylpropanol (AMP), triet
Franzke Michael
Stein Bernd
Jones Dameron L.
Striker Michael J.
Wella Aktiengesellschaft
Wells Lauren Q.
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