FR2889809A1 - Cosmetic products for make-up of face, body and nails, comprises two-colored compound in grains in which a surface and a core of the grains have different colors - Google Patents

Abstract

The cosmetic products for make-up of face, body and nails, comprises two-colored compound in grains in which a surface and a core of the grains have different colors. The cosmetic products are in the form of liquid, oily/watery gel, emulsion/cream and free/pressed pulverulent. A mechanical constraint is applied on the grains to change the color of the product. A size of the grain is 0.5-25 mu m and thickness of the surface layer is 0.1-5 mu m. The core of the grain is covered with body of small islet like material. The cosmetic products for make-up of face, body and nails, comprises two-colored compound in grains in which a surface and a core of the grains have different colors. The cosmetic products are in the form of liquid, oily/watery gel, emulsion/cream and free/pressed pulverulent. A mechanical constraint is applied on the grains to change the color of the product. A size of the grain is 0.5-25 mu m and thickness of the surface layer is 0.1-5 mu m. The core of the grain is covered with body of small islet like material. The product is a dispersion of: two-colored granular compound in a mixture of a polymer, a heavy alcohol, a greasy substance, an ester, a pigment, liquid monomer, solvent containing a cordial, oil/water emulsion and oil/water/cream gel; and titanium oxide, zinc oxide, magnesium oxide and colored pigment. The two-colored granular compound is dispersed in the product, where the compound is silicate of zinc and manganese or silicate of calcium and manganese.

Description

Effect material for application in cosmetics

  TECHNICAL FIELD OF THE INVENTION The invention relates to the field of cosmetology, treatment and make-up for the face, body and nails, and more particularly liquid products, oily or aqueous gels, creamy or emulsified forms, free or pressed powdery forms.

  Mventidn relates to the color or the hue u the density of tint OR the shading effect.

  PRIOR ART Color effects are generally obtained with dyes, that is to say liquids dispersed or dissolved in the medium to be colored, organic or inorganic pigments, that is to say solid particles dispersed in the medium. medium to color.

  The color is obtained by mixing dyes or pigments in the medium to be colored, in proportions defined by the color objective. This medium is then generally used to deposit on the surface of the object to be treated a film which contains the dyes or pigments.

  The fields of painting and cosmetics have long used such mixtures of dyes or pigments in solvent or aqueous media or emulsions.

  It is sometimes looked for shades that the user can modify to bring 2s vanatins Idcalds of color of the density of teirnte. These variations can be obtained by additions of dyes or pigments in the case of paints but obtaining a continuous variation is then difficult to achieve. In the case of cosmetic applications, the variation must be obtained without modification of the product.

  A variation in hue can be obtained by a variation in the thickness of the deposit, whether in the case of paints or cosmetic applications, but these variations in thickness can also cause appearance variations that are not desirable or that may It is an object of the invention to overcome these drawbacks, and in particular to provide a product whose color or hue density can be modified by the user. SUMMARY OF THE INVENTION without addition of dye or pigment.

  The invention relates to a product in the field of cosmetology, treatment and makeup for the face, body and nails, and more particularly liquid products, oily or aqueous gels, creamy or emulsified forms, forms free or pressed pulverulent, which will allow, during its application or after its application, to change the color, hue or density of the deposit.

  According to the invention, this object is achieved by a product containing a bicolor compound in grains whose surface of the grains has a first color and whose heart of the grains has a second color, in particular a white color, and such that a mechanical stress Shear applied to these grains results in a change in color, hue or hue density of the product.

  According to a variant of the invention, the product is a mixture of solid products containing in dispersion the grains of the two-color compound.

  According to another variant of the invention, the product is a liquid or a paste containing in dispersion the grains of the two-color compound.

  According to a development of the invention, the product contains silicate grains containing manganese whose heart has a dark ocherjaune hue and whose surface has a lighter shade, especially ocher-yellow or white.

Brief description of the drawings

  Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention given as non-limiting examples and in which Figures 1 to 4 illustrate particular embodiments of the two-color compound.

  Description of particular embodiments.

  According to a first embodiment of the invention illustrated in FIG. 1, the product contains grains formed of a core 1 which has a first color, this leather being covered with a surface layer 2 having a second color, adhesion of the surface layer 2 to the core 1 being weak so as to detach from the core when the grain is subjected to a mechanical action, in particular the mechanical stress of shearing a finger on the skin for cosmetology products . The core 1 has a porosity of between 0% in the case of a dense core, and 90% in the case of a highly porous core material. According to this first embodiment of the invention, the grains of the two-color compound have a size of between 0.5 μm and 25 μm and have a compact shape or a flat shape or an elongate shape, and the surface layer has a thickness of between 0.1 pm and 5 pm and may have discontinuities.

  According to a second embodiment of the invention illustrated in FIG. 2, the product contains grains formed of a core 1 which has a first color, this core being covered with a set of small islands 3 of a material having a second color, the adhesion of the islands 3 on the core 1 being weak so as to detach from the heart when the grain is subjected to a mechanical action, including the mechanical stress of shearing a finger on the skin for the products of cosmetology. Court 1 has a porosity of between 0% in the case of a dense core, and 90% in the case of a highly porous yard material. According to this second embodiment of the invention, the grains of the two-color compound have a size of between 0.5 μm and 25 μm and have a compact shape or a flat shape or an elongated shape and the islets cover between 40 and 100% of the surface of the heart.

  According to a third embodiment of the invention illustrated in FIG. 3, the product contains grains formed of a core itself composed of a set of particles 4 having a first color, this section being covered continuously or not a set of particles 5 formed of a material having a second color. The variation of color when the grain is subjected to a mechanical action, in particular the mechanical stress of shearing a finger on the skin for cosmetology products, comes from the crumbling of the grain, in particular the separation between the particles of the yard 4 and the surface particles 5. The particles 4 are bonded together by interdiffusion following sintering, or by means of an organic or inorganic agent, or by simple effect of Van der Waals forces or electrostatic forces. The particles are bonded to the ring particles 4 by interdiffusion following sintering, or via an organic or inorganic agent, or by simple effect of Van der Waals forces or electrostatic forces. According to this third embodiment of the invention, the grains of the two-color compound have a size of between 1 μm and 25 μm and have a compact shape or a flat shape or an elongated shape, the particles 4 have a size between 0.3. pm and 10 pm and the particles 5 cover between 40 and 100 t of the surface of the heart.

  According to a variant of this third embodiment of the invention illustrated in FIG. 4, the product contains grains of a two-color compound formed of a c-Wur itself composed of a set of particles 4 of a first color, this core being covered continuously or not with a set of particles 6 formed of the same material as the particles 4. These particles 6 have on their inward facing surface of the agglomerate the same o color as the particles 4 of the core while they have on their surface facing the outside of the agglomerate a second color.

  According to a variant of the invention, the product is a dispersion of the two-color granular compound in a mixture of at least one solid organic product, and in particular but without being limiting a polymer, a heavy alcohol, a fatty substance, an ester, or more generally any organic compound used in the composition of free or pressed powder forms.

  According to another variant of the invention, the product is a dispersion of the two-color granular compound in a mixture of at least one solid organic product, and in particular but without being limiting a polymer, a heavy alcohol, a fatty substance, an ester, a pigment or, more generally, any organic compound used in the composition of pulverulent forms which are free or pressed with an inorganic filler, and in particular but without being limiting to titanium oxide, zinc oxide or magnesium oxide, In another variant of the invention, the product is a dispersion of the two-color granular compound in a liquid or a paste, in particular a liquid monomer, a solvent containing a dissolved binder, an oily or aqueous emulsion, a gel oily or aqueous or a cream.

  According to another variant of the invention, the product is a dispersion of the two-color granular compound in a liquid or a paste, in particular a liquid monomer, a solvent containing a dissolved binder, an oily or aqueous emulsion, an oily or aqueous gel or a cream, added with an inorganic filler and in particular but not limited to titanium oxide, zinc oxide, magnesium oxide, a colored pigment.

  According to a development of the invention, the two-color granular compound is composed of microcrystalline grains of a manganese-containing silicate, in particular zinc silicate and manganese Zni_xMn, FSiO3 or ZnI_ XMn; (SiO4 or a silicate of calcium and manganese Cai_XMnXSiO3 or Cal_ xMn) (SiO4, and whose heart has a dark yellow ocher tint and whose surface has a lighter shade, especially ocher-yellow or white.These color variations come from a manganese oxidation state variation between the crystallites 5 of the surface of the grains and the crystallites 4 at the heart of the grains.

  In cosmetology, especially in the form of a liquid product, an oily or aqueous gel, a creamy or emulsified form, a free or pressed powder form, the use of the product according to the invention consists of depositing on the skin or nails, and then exerting mechanical shear stress with a tool or the fingers, the variation in color or hue appearing only at the place where mechanical shear stress has been caused. The variatiôn of color tint resulting from this mechanical shear stress is all the more intense as the mechanical shear stress is strong and is exercised for a long time.

  The invention is not limited to the particular embodiments described and shown above. In particular, the product may contain two color compounds whose color or color variations will affect different parts of the color spectrum. The products may be two-phase products of which only one of the two phases contains the two-color compound.

  The realization of the process according to the invention will be described in more detail hereinafter.

1s Example

  In addition to the usual elements used in the composition of this type of cream, a makeup cream for the face contains a two-color granular compound composed of agglomerates of grains of a silicate of formula Zn1: sMno.2SiO4. These agglomerates consist of particles 4 whose average size is between 0.4 μm and 2 μm and forming the core of the agglomerates. These particles have an ocher hue. The surface of these agglomerates consists of particles whose average size is between 0.4 μm and 2 μm. These particles have a white hue. They cover more than 90% of the surface of the particles 4 of the heart. Due to the presence of these white surface particles, the agglomerates show a very pale color, ocher hue.

  The cream contains 4% by weight of the two-color granular compound. This load colors very little cream. In use, the cream is spread on the skin of the face in a thin film. Local frictional action by the fingers on the cream film and the skin results in the splitting of the agglomerates of the two-color granular compound and reveals the particles forming the core of the agglomerates. The film of cream evolves under this action to become more colorful, with a marked ocher hue.

  1. Products in the field of cosmetology, treatment and make-up for the face, body and nails, and more particularly liquid products, oily or aqueous gels, creamy or emulsified forms, free or pressed powdery forms , characterized in that it contains a two-color compound in grains whose surface of the grains has a first color and the heart of the grains has a second color and a mechanical stress applied on these 1a grains causes a change of color, shade or product dye density.

  2. Product according to claim 1 characterized in that the grains of the two-color compound have a size between 0.5 pm and 25 pm and the surface layer has a thickness between 0.1 pm and 5 pm.

  3. Product according to claim 1 characterized in that, in the grains of the two-color compound, the particle of a first color forming the core of the grains is covered with a set of small islands 3 of a material having a second color.

  4. Product according to claim 1 characterized in that, in the grains of the two-color compound, the heart of the grains is itself composed of a set of particles of a first color, this core being covered with a set of particles presenting a second color.

  5. Product according to any one of claims 1 to 4 characterized in that the product is a dispersion of the two-color granular compound in a mixture of at least one solid organic product, and in particular a polymer, a heavy alcohol, a fatty substance. , an ester, a pigment.

  6. Product according to claim 5 characterized in that the product contains in dispersion an inorganic filler, including titanium oxide, zinc oxide, magnesium oxide, a colored pigment.

  7. Product according to any one of claims 1 to 4 characterized in that the product is a dispersion of the two-color granular compound in a liquid or a paste, and in particular a liquid monomer, a solvent containing a dissolved binder, an oily emulsion or aqueous, an oily or aqueous gel or a cream.

  8. Product according to claim 7 characterized in that the product contains in dispersion an inorganic filler, including titanium oxide, zinc oxide, magnesium oxide, a colored pigment.

  9. Product according to any one of claims 1 to 8 characterized in that the two-color granular compound dispersed in the product is composed of a silicate containing manganese, in particular a zinc silicate and manganese or calcium silicate and manganese.