FR2664160A1 - Cosmetic product containing a base colouring agent, base colouring agent and process for preparing it - Google Patents

Abstract

The invention relates to beauty products. It relates to a cosmetic which comprises a base colouring agent composed of aluminium particles coated with pigment particles which comprise at least some white inorganic pigments and which are bound to the aluminium particles by a bonding agent. The base colouring agent is produced by drying a paste of the constituent particles and of bonding agent with a dispersion medium. The base colouring agent can, in addition, be treated with a water-repellent agent. Properties such as the covering power, adhesiveness, spreadability, colouring ability and opacity are improved.

Description

 The present invention relates to cosmetics, especially makeup cosmetics, containing a basic coloring agent.

 Traditional cosmetics such as cosmetic cosmetics containing, as base agents (or powders) for cosmetics, white pigments such as talc, titanium oxide, mica, kaolin, zinc oxide or carbonate magnesium, and coloring pigments such as iron oxide, carbon black or lacquers, and also containing colorants, oils and fats, emulsifiers or perfumes, are prepared in the form of powders, compact powders, emulsified foundations or foundations dissolved in water or in an oil.

 However, it has been confirmed that it is difficult, using the cosmetics described above, containing the cosmetic base agents mentioned above, to mask various skin imperfections, such as freckles or naevi, in their natural state or in a state without any discomfort, such as thickening or whitening.

In fact, although titanium dioxide or zinc flower, for example, has been used in conventional cosmetics, as base agents for these products to improve the hiding power, the opacity of the base agent remains insufficient even if this agent is used in a quantity of 100% of cosmetics, although cosmetics in which the amount of base agent reaches 100% can no longer be used as such.

 The present invention aims to find cosmetics that do not have the disadvantages mentioned above, the prior art.

 To achieve this objective, the present invention provides beauty products comprising a base coloring agent formed of aluminum particles and pigment particles covering said aluminum particles, the pigment particles containing at least white inorganic pigments and being bonded to said aluminum particles. The binder is normally composed of at least one water-soluble polymer and an oil-soluble polymer.

 The basic coloring agent can be pre-treated with a water-repellent agent.

 Since the basic coloring agent contained in the cosmetics of the present invention is formed of aluminum particles and pigment particles covering the aluminum particles, the pigment particles containing at least white inorganic pigments and being bound to the aluminum particles by a binder, normally composed of a water-soluble or oil-soluble polymer, the agent has superiority in hiding power, ability to adhere tightly, The beauty products of the present invention, including the basic coloring agent, can cover various skin defects such as naevi, with a sensation. natural, that is to say a sensation devoid of any annoying impression, such as a thickening, a difference in level or a whitening.

 Because the aluminum particles are coated with pigment particles containing at least the white pigments (it will simply be a question of pigment particles in what follows) and they are devoid of metallic luster, a predetermined amount of Basic coloring agent may be added to produce cosmetics without the disadvantages described above.

 The following is a brief overview of the process by which the Applicant has arrived at the present invention.

 Following work to obtain a basic agent for beauty products having a very good spreadability and a very good hiding power, so as to overcome the disadvantages mentioned above, conventional cosmetics, the Applicant focused on aluminum particles. However, cosmetics obtained using aluminum particles themselves as a base agent can not be used in practice as cosmetics, because the cosmetics thus produced are satisfactory as regards the covering power, the opacity , the ability to spread or hold, but have a too pronounced metallic luster and are devoid of whiteness, while presenting a dull color peculiar to the metal.To attenuate the color peculiar to aluminum powders, it is necessary to apply as a top layer of cosmetics the color of the skin. Whereas a large amount of accented color cosmetics needs to be applied to remove the color of the aluminum particles, the result is the formation of a multiple layer and an annoying sensation provided by a thickening of the layer. Moreover, since the surface of the actual aluminum powders is apparent even though a large amount of accented color cosmetics is applied, a lack of color brilliance is the final result due to friction or manifesting itself at the surface. course of time. In addition, a narrow adhesiveness may possibly not be obtained depending on the types of skin color cosmetics that are applied as the top layer.

 The Applicant has therefore increased his research in the recovery of individual particles of aluminum with white inorganic pigments such as titanium oxide. The present invention is the result of this research.

 The basic coloring agent contained in the cosmetics of the invention is superior in their hiding power, tightness of adhesion, spreadability, color fastness and opacity, because the particles of aluminum are coated with pigment particles which are attached thereto by means of a binder formed of a soluble polymer.

 The cosmetics of the invention, containing the basic coloring agent mentioned above, can mask skin defects such as spots, freckles or naevi by leaving a natural impression, ie that is to say an impression without annoying sensation such as a thickening, a difference in level or a whitening.

 The single figure of the appended drawing is a graph showing light transmittance variation versus wavelength for transmittance test samples containing basic coloring agents used in the cosmetics of the invention and control base agents.

Basic coloring agent
The basic coloring agent is composed of aluminum particles and pigment particles covering the aluminum particles. The pigment particles contain at least inorganic white pigments and are attached to the aluminum particles by a binder of at least one water-soluble polymer and an oil-soluble polymer.

 The aluminum particles advantageously have diameters of 5 to 50 ssm and in particular 5 to 20 μm.

 The pigment particles contain at least inorganic white pigments and may be composed solely of inorganic white pigments or inorganic white pigment particles and inorganic or organic pigment colored particles. The pigment particle may also carry a surface coating, if appropriate. The percentage of inorganic white pigments contained in the pigment particles to reduce the metallic luster at the surface of the aluminum particles is advantageously equal to or greater than 50% by weight. The inorganic white pigment is a colorless inorganic compound of high refractive index and can therefore be formed of optionally coated zinc oxide, for example, fatty acids, talc, mica or mica combined with titanium. Titanium oxide is preferred because of its opacity.

The colored inorganic pigments are pigments which contain colored transition elements and can therefore contain at least one of the elements V,
Cr, Mn, Fe, Co, Ni, Cu, Mo, W, Hg, Pb, Sb, S, Se and Sn. Examples include yellow iron oxide, ferric oxide (Fe 2 O 3) and ferrosoferric oxide (Fe 3 O 4).

 Organic pigments may include tar-based pigments such as red red 202, red red 204, yellow yellow 401 and orange orange 203.

 Although the diameter of the pigment particles is sufficient to cover at least the aluminum particles, a diameter that is as small as possible is preferable to obtain a uniform net coating. Therefore, the particle diameter is preferably from 0.01 to 5.0 am and preferably from 0.01 to 0.5 μm. In the case where a titanium oxide pigment is used, titanium oxide fine particles are advantageously used for aluminum particles having diameters of the order of 5 to 10 Am. The preferred diameter of the particles of titanium oxide is titanium oxide ranges from 0.01 to 0.10 m. Although titanium oxide having particle diameters in excess of 1.0 μm may be used with aluminum particles having twist diameters of 10 to 50 m, titanium oxide fine particles having of the order of 0.05 m or less to obtain a uniform net coating.

 All that is required is a quantity of the binder formed of a water-soluble or oil-soluble polymer, hereinafter referred to as a soluble polymer, which binds the pigment particles to the aluminum particles. The pigment particles are coated with the binder formed by the soluble polymer so that they attach to the aluminum particles.

 The binder formed of the soluble polymer can be produced by drying a solution obtained by dissolving or dispersing the soluble polymer in a solvent. An emulsion can also be used, if necessary. Provided the polymer and / or dispersion medium is suitably selected, the binder may optionally be formed from both the water-soluble polymer and the oil-soluble polymer.

 One or more materials, such as maleic styrene-maleic anhydride copolymer, polycarbonate resin, polyacrylic resin, styrene resin, styrene-octyl acrylate copolymer, vinyl acetate resin, can be used as the soluble polymer. methylcellulose, ethylcellulose and a vinyl alcohol polymer.

 The basic coloring agent may be rendered water-repellent by treatment with an agent capable of improving the water repellency and skin adhesion of make-up cosmetics containing the basic coloring agent so treated.

 The water-repellent agent used for this purpose may comprise higher fatty acids such as lauric acid, myristic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, lanolic acid, tall oil, isostearic acid or dimer acid, silicone oils such as methylhydrodiene-polysiloxane, dimethylpolysiloxane or methylphenylpolysiloxane, and analogous compounds which may be used alone or in combination with association.

 To accomplish the water-repellent treatment, 0.1 to 20% by weight of a water-repellent product is dissolved in a volatile organic solvent such as acetone, ethyl acetate, isopropanol or ethanol, and is gradually added. by stirring the resulting solution with about 5 to 40% by weight of a basic coloring agent, the resulting mixture is stirred for 5 to 120 minutes and the solvent is removed by volatilization with stirring and, if necessary, by heating to form a film of the water-repellent agent on the surface of the basic coloring agent, in a thickness of the order of 1 to 10 μm. Alternatively, if the water repellency is simply one or more higher fatty acids, 0.1 to 20% by weight of the higher fatty acids are uniformly mixed in the basic coloring agent, after which a vacuum is created in the base coloring agent. the mixing vessel and agitating the mixture at a temperature of 60 ° C to 1200 ° C, thereby coating the surface of the base coloring agent with a similar film of the water-repellent agent. It should be noted that the solvent must be chosen so that it does not dissolve the binder contained in the basic coloring agent.

Process for producing the basic coloring agent
In order to produce the basic coloring agent, binder-coated (for example polymer) pigment particles obtained by adsorption coating of pigment particles containing at least the inorganic pigments of white color with a binder are dispersed in a suitable medium. soluble in a solvent (for example the water-soluble polymer or in the oil), and aluminum powders, and the mixture obtained in the dispersion medium is atomized and dried. According to this method, since the binder-coated pigment particles are uniformly distributed on the surface of the aluminum particles, aggregation thereof is less likely to occur and the basic coloring agent is thus more efficiently obtained.

 The mixture in the dispersion medium is a mixture in which the polymer-coated pigment particles and the aluminum particles are dispersed. The water-soluble and oil-soluble polymer is adsorbed to the pigment particles containing at least the white inorganic pigments, which has the effect of covering the pigment particles.

 In order to produce the mixture in the dispersion medium, the pigment particles and the soluble polymer, which may be in the emulsified state, if appropriate, are dispersed or dissolved in a dispersion medium to produce a pigment paste, i.e., polymer-coated pigment particles, and the pigment paste and the aluminum particles are uniformly mixed with the dispersion medium. Pigment particles can be added again at this time, if necessary.

 A dispersion medium in which the aluminum particles and the pigment particles are dispersed and wherein the soluble polymer is dissolved or emulsified can be used. Although the dispersion medium may be suitably selected depending on the pigment particles and the soluble polymer used, a volatile dispersion medium is preferable to facilitate the drying of the mixture following the atomization. Depending on the types of water soluble polymer and oil soluble polymer, a dispersion medium can be used which can dissolve both these different types of polymer.

 Examples illustrating the volatile dispersion medium include toluene, xylene, methyl ethyl ketone, methanol, ethanol, propyl alcohol, benzene, methylene chloride, tetrachlorethylene, methyl isobutyl ketone and water.

 Surfactants or methyl isobutyl ketone may be added at the time of dispersion or dissolution of the pigment particles and the soluble polymer in the dispersion medium. The role of the surfactants is to allow good dispersion of the pigment particles and aluminum particles in the medium or to modify the surface of the basic coloring agent that is produced. The function of methyl isobutyl ketone is to change the polarity of the dispersion medium to allow good dispersion of the pigment particles and aluminum particles in the medium.

 The aluminum particles can be pretreated by coating with fatty acids. Although the coating layer is optionally dissolved by the use of an organic solvent as a dispersion medium, the basic coloring agent that is to be obtained can nevertheless be produced.

 For dispersing or dissolving the pigment particles or the polymer soluble in the dispersion medium, it is possible to proceed wet by using a ball mill, a mixed ball mill or a "Daino" mill, by liquid means using a Besselt or dry dispersion machine using a Henschell mixer. Wet or liquid dispersion is highly appreciated.

 To uniformly mix the aluminum particles and the pigment particles in the dispersion medium, any wet, liquid or dry dispersion method may be used.

 The pigment paste may consist of 10 to 50% by weight of the dispersion medium, 10 to 85% by weight of the pigment particles and 2 to 15% by weight of the soluble polymer.

 The proportion by weight of the mixture, in the dispersion medium, of aluminum particles, pigment particles, soluble polymer and dispersion medium may be, for example, from 2: 7: 1: 5 to 20.

The mixture based on the dispersion medium can be atomized using, for example, an atomization apparatus such as an atomization nozzle, by drying in contact with a stream of fluid such as air or water. heated nitrogen. Alternatively, the mixture based on the dispersion medium can also be atomized and dried by passing through a tube whose interior is evacuated with air and which is heated to a temperature of the order of 30 to 300 ° C. first method can be implemented with the help, for example, of a spray drying apparatus, while the second method can be implemented using a device CRUX (trade name) of the firm Hosokawa
Micron Co. Ltd.

Cosmetic product
The cosmetic product or beauty product of the present invention contains the basic coloring agent mentioned above and is used primarily as a make-up cosmetic. When the cosmetic is used for makeup, it may be composed solely of the basic coloring agent, depending on its nature and its application, or it may contain one or more ingredients such as inorganic powders, organic powders, pigments , oily agents and water, in addition to the basic coloring agent. Other agents commonly used in cosmetics, such as surfactants, humectants, ultraviolet absorbers, antiseptics, antioxidants or a perfume, may also be added, as appropriate.

 Although makeup cosmetics divide into basic make-up cosmetics (hereinafter referred to as "basic makeup") and point-make-up cosmetics, the cosmetics of the present invention are suitable as basic makeup because they contain the coloring agent of the aforementioned basic and they are effective as cosmetics requiring a high covering power vis-à-vis stains, freckles and naevi.

 Basic makeup includes basic makeup products such as a makeup base; foundations such as a liquid foundation, an emulsion foundation or a foundation of the type of a greasy gel or a foundation of complexion powder; and last applied products such as rice powders or compact powders. One-time makeup includes makeup for the eyes such as eye shadow, eye liner, eyebrow pencil or mascara, blush and lipstick.

 The following proportions are used in the basic coloring agent in various makeup cosmetics.

 In the case of the base layer or the liquid foundation, up to about 25% by weight of basic coloring agent may be added, depending on the shape or condition of the cosmetic or the feeling of color. use, that is, the ease with which cosmetics are used. The preferred amount of base coloring agent is 10 to 20% by weight.

 In the case of the emulsified foundation, it is possible to add up to 35% by weight of the basic coloring agent, taking into account the shape or the state of the cosmetic or the sensation of use. that is, the ease with which cosmetics are used. The preferred amount of base coloring agent is 15 to 30% by weight.

 In the case of the foundation of the type of a greasy gel, that is to say the foundation of the type dispersed in an oil phase, such as oil or wax, it is possible to add at 80% by weight of the basic coloring agent in view of the shape or the state of the cosmetic product and the sensation with the use of this product, for example the constraints of preparation, of moldability, of transferability on a powder puff, the choice of color tone, etc. The preferred amount of basic coloring agent is 40 to 70% by weight.

 In the case of the powder foundation and the compact dyed base, up to 100% by weight of the basic coloring agent can be added. More particularly, it is possible to add up to 95% by weight of the agent, taking into account the shape or the state of the cosmetic and the sensation with the use of the latter, for example the transfer capacity on a powder puff. powder, moisture sensation, tight adhesion printing, durability, choice of color tone, moldability, oil coating, etc. The preferred amount of base coloring agent is 80 to 90% by weight.

 In the case of a foundation of the type of a rice powder, up to 100% by weight of the basic coloring agent may be added. The adhesion strength of cosmetic products can be improved when a minor proportion of the basic coloring agent, for example 1 to 7% by weight based on the weight of this agent, has been coated with an oil. The preferred amount of base coloring agent is 90 to 96% by weight.

 The following are inorganic powders, organic powders, pigments and oily agents which may be added in addition to the basic coloring agent.

 The organic and inorganic powders advantageously have mean particle diameters in the range of 1.0 to 20 μm. There is no limitation with respect to organic and inorganic powders as long as they are of conventional use in cosmetic powders. Thus, the inorganic powders include talc, kaolin, sericite, muscovite, synthetic mica, phlogopite, mica, lepidolite, biotite, lithium oxide mica, vermiculite, magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, silicate calcium silicate, aluminum silicate, barium silicate, strontium silicate, metal salts of tungstic acid, iron oxide a, hydrated iron oxide, silica and hydroxyapatite, while the organic powders comprise an acrylic resin, a polyethylene, a "nylon" (trade mark), fluorinated resins such as "Teflon" (trade name) and a polystyrene. To obtain a better uniformity of spreading and a better spreading and for To avoid agglutination, spherical powders are advantageously chosen from among the powders listed above.

 The pigments advantageously have mean particle diameters in a range from 0.01 to 10 μm and may comprise white inorganic pigments such as titanium oxide or zinc oxide, red-colored inorganic pigments such as iron oxide (red) or iron titanate, yellow inorganic pigments such as yellow iron oxide or yellow ocher, purple inorganic pigments such as Mango violet or cobalt violet, inorganic pigments greens such as chromium oxide, chromium hydroxide or cobalt titanate blue inorganic pigments such as Overseas Blue or Prussian Blue; pearlescent pigments such as titanium oxide coated mica, titanium oxide coated bismuth oxychloride, bismuth oxychloride, titanium oxide coated barium sulfate, talc coated talcum titanium, metal flakes in scales or mica coated with titanium oxide and colored; and powdered metal pigments such as aluminum or copper powder.

 Since these inorganic and organic powders and pigments are auxiliaries of the basic coloring agent, they are used in specific amounts in relation to the amount of base dye used.

 The oily agents may be those used as a cosmetic material and include any of a variety of materials such as hydrocarbons, higher fatty acids, oils and fats, higher alcohols and waxes such as squalane, liquid paraffin, petrolatum, microcrystalline wax, ozokerite, ceresin, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, cetyl alcohol, alcohol oleyl, 2-octyldodecyl myristate, gum-like 2-octyl dodecyl ester, 2-octyl dodecylabietate, 2-octyl dodecyloleate, isopropyl myristate, triglyceride isostearate, triglyceride fatty acids from palm oil, olive oil, avocado oil, beeswax, myristyl myristate, transesterification oil from olive oil and Castor oil, mink oil or lanolin.

EXAMPLES
Examples of the preparation of the basic coloring agent are given below as Examples of Preparation 1 to 4, in which parts are by weight.

Preparation Example 1
140 parts of fine titanium oxide particles (particle diameter: 0.01 to 0.1 μm), 14 parts of octyl acrylate-styrene copolymer (soluble polymer), 100 parts of propyl alcohol and 1 part of methyl isobutyl ketone was loaded into a wet-type bead mill so as to be mixed and dispersed for 24 hours until a pigment paste was obtained.

 Next, 2000 parts of a 9/1 mixture of propyl alcohol and methyl isobutyl ketone, 200 parts of the above-mentioned pigment paste, 20 parts of aluminum powder (particle diameter: 5 to 15 Am) and 300 Particles of titanium oxide (particle diameter 0.5 to 5 μm) were loaded into a wet dispersion apparatus and dispersed sufficiently with stirring until a mixture constituting the dispersion medium was obtained. The latter was spray-dried at 130-150 ° C using a spray-drying apparatus until a desired basecoat agent was obtained.

Preparation Example 2
130 parts of titanium oxide fine particles (particle diameter: 0.01 to 0.1 μm), 10 parts of iron oxide (particle diameter: 0.1 to 0.5 μm), 14 parts of octyl isyrene acrylate copolymer (soluble polymer), 100 parts of propyl alcohol and 1 part of methyl isobutyl ketone were loaded into a wet mill and were mixed and dispersed for 24 hours until of a pigment paste.

 Then 2000 parts of a mixed solvent of propyl alcohol and methyl isobutyl ketone (mixing ratio 9/1), 200 parts of the pigment powder, 20 parts of aluminum powder (particle diameter 5 to 15 μm), 323 parts of titanium oxide (particle diameter: 0.5 to 5 μm), 16 parts of iron oxide and 1 part of ultramarine were charged in a wet dispersion apparatus and stirred and dispersed uniformly until for obtaining a dispersion-forming mixture, which was then spray-dried at 130-150 ° C by means of a spray-drying apparatus to obtain a dyeing agent; desired base.

Preparation Example 3
130 parts of titanium oxide fine particles (particle diameter: 0.01 to 0.1 μm), 10 parts of iron oxide (particle diameter: 0.1 to 0.5 μm), 14 parts of An octyl styrene acrylate copolymer (soluble polymer), 100 parts of propyl alcohol and 1 part of methyl isobutyl ketone were loaded into a wet-bead mill and mixed and dispersed for 24 hours until the reaction was complete. a pigment paste.

 2000 parts of a 9/1 mixed solvent of propyl alcohol and methyl isobutyl ketone, 200 parts of the pigment paste, 20 parts of aluminum powder (particle diameter: 5 to 15 μm), 260 parts of titanium (particle diameter: 0.5 to 5 μm), 10 parts of spherical acrylic powders (particle diameter: 8 to 10 μm), 20 parts of mica, 25 parts of titanium-combined mica and 17 parts of magnesium oxide. Particle iron of 0.1 to 0.5 μm in diameter was loaded into a wet dispersion apparatus and the feed was agitated and uniformly dispersed to a mixture forming a carrier medium. The dispersion was then spray-dried at 130-150 ° C using a spray-drying apparatus until a desired basic coloring agent was obtained.

Example of Draration 4
90 parts of titanium oxide fine particles (particle diameter: 0.01 to 0.1 μm), 40 parts of zinc oxide (particle diameter: 0.01 to 0.1 μm), 5 parts of iron oxide (particle diameter: 0.1 to 0.5 μm), 15 parts of a vinyl acetate polymer (soluble polymer), 80 parts of benzene and 20 parts of toluene were loaded into a grinder Wet bead beads were mixed and dispersed for 24 hours until a pigment paste was obtained.

 Next, 2000 parts of toluene, 200 parts of the above-mentioned pigment paste and 25 parts of powdered aluminum (particle diameter: 5 to 15 μm) were charged to a liquid dispersion unit and stirred and dispersed uniformly until a dispersion medium-forming mixture was obtained which was then spray-dried using a spray-drying apparatus at 150-180 C until a desired basic coloring agent.

Measurement of hiding power
The hiding power of the basic coloring agent was measured according to the following tests on opacity, color measurement and light transmittance.

(1) Opacity test
Sample
4 parts of castor oil and 1 part of the basic coloring agent obtained in Preparation Example 1 were suitably kneaded and applied to a thickness of 0.127 mm on a sheet of opacity paper (JIS -K5400, manufactured by Taiyu
Material, Inc.) to a thickness of 0.127 mm using a doctor blade, to produce a test sample.

By proceeding in the same manner as above, but using instead of the above-mentioned basic coloring agent the following basic coloring agents (a) to (f), test samples were produced. (a) to (f) associated with respective control base officers
control base agent (a) composed only of aluminum particles (particle diameter: 5 to 15 μm);
control base agent (b) which is a mixture of 1 part by weight of aluminum particles (particle diameter: 5 to 15 Am) and 7 parts by weight of the titanium oxide fine particles (particle diameter 0 0.1 to 0.1 μm);
control base agent (c), which is a mixture of 1 part by weight of aluminum particles (particle diameter: 5 to 15 ssm) and 15 parts by weight of titanium oxide (particle diameter: 0, 5 to 5 Au);
control base agent (d) which is a mixture of 1 part by weight of aluminum particles (particle diameter: 5 to 15 μm), 7 parts by weight of titanium oxide fine particles (particle diameter 0, 0.1 to 0.1 μm) and 15 parts by weight of titanium oxide (particle diameter: 0.5 to 5 μm); and
control base agent (e) composed of fine particles of titanium oxide (particle diameter 0.01 to 0.1 μm); and
control base agent (f) consisting of titanium oxide (particle diameter: 0.5 to 5 μm).

Evaluation process
The return light irregularly reflected by each of the above test samples was evaluated with the naked eye on the basis of the degree of visibility of the boundary between the black and white backgrounds of the control paper sheets. 'opacity. Thus, the total invisibility of the limit scored 10 and the total visibility of the black and white backgrounds was rated 0.

Results
Sample prepared with the basic coloring agent of Preparation Example 1 8
Sample sample for opacity at 10
Sample sample for opacity b 4
Sample sample for opacity c 6
Sample sample for opacity d 5
Sample sample for opacity e 1
Sample sample for opacity 1 3
Although the basic coloring agent of the present invention was slightly inferior in opacity to the control sample composed solely of aluminum particles, it exhibited greater opacity than the usual agent composed of aluminum and titanium oxide, while it was totally devoid of metallic luster specific to aluminum.

(2) Color control test
Test samples
4 parts of castor oil and 1 part of the basic coloring agent prepared by Preparation Example 3 were intimately kneaded and applied with a doctor blade on a sheet of opacity control paper manufactured by Taiyu Kizai KK in accordance with JIS-K5400 at a thickness of 0.127 mm to produce a test sample.

 As control base agents, D & D Pola foundation and Pola powder foundation black eyes, which are commercially available powdered foundations, were used as controls A and B.

Evaluation method
Using a colorimeter, the L, a, and b values were measured in the white and black regions of the opacity control paper sheets, in accordance with the Hunter Lab color space. The results are shown in Table I.

 It is apparent from Table I that the basic coloring agent according to the present invention exhibits substantially the same degree of brightness (L value), respectively, to the white and black portions, and superiority of hiding power, and that the coloring agent base itself can be used satisfactorily as a cosmetic product.

(3) Light transmittance test
TABLE I

<tb><SEP> Value <SEP> L <SEP> Value <SEP> a <SEP> Value <SEP> b
<tb><SEP> White <SEP> 89.00 <SEP> -0.24 <SEP> 1.67
<tb><SEP> Example <SEP> of <SEP> preparation <SEP> 3 <SEP> 65.81 <SEP> 4.20 <SEP> 14.30
<tb> Party
<tb> white <SEP> Agent <SEP> control <SEP> from <SEP> base <SEP>"A"<SEP> 64.71 <SEP> 9.71 <SEP> 17.99
<tb><SEP> Agent <SEP> control <SEP> from <SEP> basis <SEP>"B"<SEP> 66,15 <SEP> 10,84 <SEP> 16,32
<tb><SEP> White <SEP> 34.53 <SEP> 0.16 <SEP> 1.24
<tb><SEP> Example <SEP> of <SEP> preparation <SEP> 3 <SEP> 65.10 <SEP> 3.35 <SEP> 13.72
<tb> Party
<tb> black <SEP> Agent <SEP> control <SEP> from <SEP> basis <SEP>"A"<SEP> 51.78 <SE> 1.82 <SEP> 4.93
<tb><SEP> Agent <SEP> control <SEP> of <SEP> basis <SEP>"B"<SEP> 55.39 <SEP> 2.59 <SEP> 6.54
<Tb>
Test samples
4 parts of castor oil and 2 parts of the basic coloring agent obtained by Preparation Example 3 were suitably kneaded and applied with a doctor blade to a thickness of 0.127 mm on a glass plate quartz to produce a test sample. On the other hand, by operating in the same manner as above, but substituting for the base control agent "B" 50% by weight of the basic coloring agent, another test sample was produced.

 Similarly, operating in the same manner as above, but using the basic "A" and "B" control agents in place of the basic coloring agent mentioned above, "AA" control samples were produced and BB1, relative to the transmittance of light, in association with the control base agents.

Evaluation method and results
The light transmittance of the test samples was measured using a spectrophotometer
UV-240 from the firm Shimazu-Seisakusho. The results are shown in Figure 1 which clearly shows the following effect.

 The light transmittance of the control sample "AA" is equal to or greater than 20% in the wavelength range of 300 nm or greater and 60 or more than 60% in the range of 340 nm or greater.

 The light transmittance of the control sample "BB" does not exceed 10% in the wavelength range of 300 nm or more, it does not exceed 30% in the range of 330 nm or more and it is equal to or greater than about 40% for a range of 400 nm or more.

The test sample composed of the basic coloring agent prepared by Preparation Example 3 has a light transmittance of the order of 3% or less, while the test sample composed of a mixture 50% by weight of the basic control agent "B" and 50% by weight of the basic coloring agent prepared by the Example of
Preparation 3 has a light transmittance of the order of 10% or less.

 Thus, it can be seen that the basic coloring agent mentioned above is not substantially able to transmit light in the visible range in the ultraviolet range.

 The following are examples of cosmetics prepared using the basic coloring agents obtained in the preparation examples mentioned above. It should be noted that the following cosmetics have been prepared by methods analogous to the cosmetic preparation processes except that the basic coloring agent of the present invention is substituted for some or all of the conventional base for cosmetics. In the following examples, the parts are by weight.

Example 1
Foundation of the type of an oil gel parts
Basic coloring agent (Preparation Example 2) 70
Candelila wax 1,5
Carnauba wax 0,5
Microcrystalline wax 1 Glyceryl tri-2-ethylhexanoate 21
Dimethylpolysiloxane 4 1,3-butylene glycol 2
Antioxidant sufficient amount
Antiseptic sufficient amount
Perfume sufficient quantity
Example 2
Non-compact powder (rice powder) parts
Basic coloring agent (Preparation Example 1) 49
Talc 33
Spherical calcium silicate 4
Mica 1.5
Titanium Mica 6
Iron oxide 0.3
Outremer 0.02
Glyceryl tri-2-ethylhexanoate 2 Dimethylpolysiloxane 2
Cetyl octanoate 2
Antioxidant suitable amount
Antiseptic quantity suitable
Perfume decent quantity
Example 3
Foundation of the type of a gel oil parts
Basic coloring agent (Preparation Example 3) 70
Candelila wax 1,5
Carnauba wax 0,5
Microcrystalline wax 1
Glyceryl tri-2-ethylhexanoate 21
Dimethylpolysiloxane 4
Glycerol 2
Antioxidant suitable amount
Antiseptic quantity suitable
Perfume decent quantity
EXAMPLE 4
Powder foundation parts
Basic coloring agent (Preparation Example 3) 43.8
Talc 6.5
Titanium oxide 14.0
Beaded silica 5.5
Mica 8.0
Titanium Mica 7.0
Iron oxide 2.7
Overseas 0.1 glycerol tri-2-ethylhexanoate 4,5
Dimethylpolysiloxane 4.0
Glycerol Isostearate 4.0 1,3-Butylene Glycol 0.1
Antiseptic sufficient amount
Antioxidant sufficient amount
Perfume sufficient quantity
Example 5
Lipstick parties
Squalane 4,6
Candelila wax 8.8
Liquid Lanolin 28
Diisostearyl malate 10
Isopropyl myristate 24
Basic coloring agent (Preparation Example 4) 10
Tar coloring paste 14.6
Antioxidant sufficient amount
Perfume sufficient quantity
Evaluation as cosmetics
Attack test for Ota naevi
Evaluation method
The cosmetic of the invention and the conventional cosmetic were applied according to the following procedures (a) to (d) and were evaluated for applicability, finish, hiding power and stackability.

(a) The oil gel type foundation of Example 1 is applied to the Ota nevi.

(b) The conventional final application medium consisting of one or more fluid powders is superimposed on the oil gel type foundation layer of (a) to produce a double layer.

(c) The basic coloring agent prepared by Preparative Example 2 is superimposed on the oil gel type foundation layer of (a) to produce a double layer.

(d) The cosmetic substrate containing aluminum powders (conventional product) is applied on naevi
Ota and the usual foundation is superimposed on the cosmetic coating layer serving as a substrate to produce a double layer.

Results
Table II illustrates the results of the evaluation of each of the procedures (a) to (d) with respect to applicability, finish, hiding power and stackability. It can be seen from columns (a) to (c) of Table II that the cosmetics of the present invention can cover Ota naevi with a natural finish, which can be easily applied and superimposed, while in the column (d) in which the cosmetics of the present invention are not used, cosmetics applied at a greater thickness produce a difference in level and, therefore, are poor in applicability and superimposability.

TABLE II

<tb><SEP> Applica- <SEP> Power <SEP> Superposa- <SEP>
<tb><SEP> bility <SEP> Finish <SEP> covering <SEP> bility
<tb> (a) <SEP> Example <SEP> 1 <SEP> good <SEP> natural <SEP> good <SEP> good
<tb><SEP> (not <SEP> of <SEP> dif
<tb><SEP><SEP>
<tb><SEP> level
<tb> (b) <SEP> Example <SEP> 1 <SEP> more
<tb><SEP> cosmetics <SEP> classic
<tb><SEP> of application <SEP> final <SEP> good <SEP> natural <SEP> good <SEP> good
<tb><SEP> (Powder <SEP> of <SEP> Rice) <SEP> (not <SEP> of <SEP> dif
<tb><SEP>(<SEP> method to <SEP> the <SEP><SEP><SEP> layer of
<tb><SEP> double) <SEP> level)
<tb> (c) <SEP> Example <SEP> 1 <SEP> plus <SEP> slightly
<tb><SEP> example <SEP> of <SEP> prepara- <SEP> good <SEP> thick <SEP> but <SEP> excel- <SEP> good
<tb><SEP> tion <SEP> 2 <SEP>(<SEP> method to <SEP> not <SEP> of <SEP> dif- <SEP> slow
<tb><SEP> the <SEP> layer <SEP> double) <SEP> ferece <SEP> of
<tb><SEP> level
<tb> (d) <SEP> Aluminum Powder <SEP>
<tb><SEP> containing <SEP> of
<tb><SEP> cosmetics- <SEP> mau- <SEP> thick <SEP> (dif
<tb><SEP> substrate <SEP> (classi- <SEP> can <SEP> ferenoe <SEP> from <SEP> good
<tb><SEP> ques) <SEP> more <SEP> a <SEP> background <SEP> level <SEP>
<tb><SEP> of <SEP> complexion <SEP> classic
<tb><SEP>(<SEP> method of <SEP> la
<tb><SEP> layer <SEP> double
<Tb>
At the same time, the basic coloring agent produced by Preparation Example 2 is used because the base agent itself can be used as a final application cosmetic.

 It should be noted that modifications may be made to the embodiments described without departing from the scope of the invention.

Claims (25)

 1. Cosmetic product, characterized in that it comprises a basic coloring agent formed of aluminum particles and pigment particles covering said aluminum particles, the pigment particles comprising at least white inorganic pigments and being attached to said aluminum particles by a binder.  2. Cosmetic product according to claim 1, characterized in that the binder consists of at least one material selected from a water-soluble polymer, an oil-soluble polymer and an emulsified polymer.  3. Cosmetic product according to claim 1 or 2, characterized in that the aluminum particles have a diameter of 5 to 50 pm (preferably 5 to 20 ssm).  4. Cosmetic product according to any one of claims 1 to 3, characterized in that the white inorganic pigments are present in an amount of at least 50% of the total pigment particles.  5. Cosmetic product according to any one of claims 1 to 4, characterized in that the pigment particles comprise colored pigments of at least one element selected from the group of elements V, Cr, Mn, Fe, Co, Ni, Cu, Mo, W, Hg, Pb, Sb, S, Se and Sn.  6. Cosmetic product according to any one of claims 1 to 5, characterized in that the pigment particles comprise organic pigments.  7. Cosmetic product according to any one of claims 1 to 6, characterized in that the white inorganic pigments are selected from the group consisting of titanium oxide, zinc oxide, talc, mica and mica combined titanium.  8. Cosmetic product according to any one of claims 1 to 7, characterized in that the pigment particles have diameters of 0.01 to 5.0 μm (preferably 0.01 to 0.5 μm).  9. Cosmetic product according to claim 7, characterized in that the aluminum particles have diameters of 5 to 10 μm and the particles of white inorganic pigment (preferably titanium oxide) have diameters of 0.01 to 0.1 m.  Cosmetic product according to Claim 7, characterized in that the aluminum particles have diameters of 10 to 50 μm and the particles of white inorganic pigment (preferably of titanium oxide) have diameters of not more than 0, 05 m.  11. Cosmetic product according to any one of claims 1 to 10, characterized in that the binder comprises a water-soluble polymer or in the oil selected from the group consisting of a styrene-maleic anhydride copolymer, a polycarbonate resin, a polyacrylic resin, styrene resin, styrene-octyl acrylate copolymer, vinyl acetate resin, methylcellulose, ethylcellulose and a vinyl alcohol polymer.  12. Cosmetic product according to any one of claims 1 to 11, characterized in that the basic coloring agent has been treated with a water-repellent agent.  13. Cosmetic product according to claim 12, characterized in that the water-repellent agent is chosen from the group comprising higher fatty acids and silicone oils.  14. Cosmetic product according to any one of claims 1 to 13, characterized in that it is a cosmetic for makeup.  15. A process for producing a basic coloring agent intended in particular for use in cosmetic products, characterized in that it consists of  forming a mixture of binder-coated pigment particles and aluminum particles, all dispersed in a dispersion medium, and  to dry the mixture.  16. A method according to claim 15, characterized in that the binder-coated pigment particles are prepared by adsorbing the binder which is soluble or emulsifiable in a solvent.  17. A method according to claim 15 or 16, characterized in that the dispersion medium is selected so that it can disperse the pigment particles and the aluminum particles and dissolve or emulsify the binder.  18. The method of claim 17, characterized in that the dispersion medium is volatile.  19. Process according to any one of claims 15 to 18, characterized in that the aluminum particles are coated with a fatty acid.  20. Process according to any one of claims 15 to 19, characterized in that the drying is carried out by atomization.  21. Basic coloring agent, characterized in that it is formed of aluminum particles and pigment particles covering said aluminum particles, the pigment particles comprising at least white inorganic pigments and being attached to said particles of aluminum. aluminum by a binder.  22. Basic coloring agent according to claim 21, characterized in that the binder is at least one material selected from a water-soluble polymer, an oil-soluble polymer and an emulsified polymer.  23. Basic coloring agent according to claim 21 or 22, characterized in that the aluminum particles have diameters of 5 to 50 μm (preferably 5 to 20 μm).  24. Basic coloring agent according to any one of claims 21 to 23, characterized in that the pigment particles have diameters of 0.01 to 5.0 μm (preferably 0.01 to 0.5 μm). .  25. Basic coloring agent according to any one of claims 21 to 24, characterized in that the white inorganic pigment is titanium oxide.