JP2005263708A - Make-up cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a make-up cosmetic that that has gloss close to bare skin, transparency and a natural finish and provides a natural sense of finish with brightness and quiet unevenness while covering skin defects. <P>SOLUTION: The make-up cosmetic comprises (A) a composite plate-like particle composed of titanium mica and an organic polymer fine particle and satisfying conditions that (1) the composite plate-like particle is obtained by fixing the organic polymer fine particle to the surface of titanium mica in the presence of carbon dioxide at a critical temperature or above and ≥4MPa, (2) the average particle diameter of the organic polymer fine particle is 0.01-100 μm, (3) the ratio (a/b) of the average particle diameter (a) of the organic polymer fine particle to the average particle diameter (b) of titanium mica is 1/2,000-1/5 and (4) the mass ratio of the organic polymer fine particle to titanium mica is 0.001-1 and (B) spherical powder having 1-20 μm average particle diameter. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a makeup cosmetic that has a natural finish with a glossy and transparent feel close to the skin while covering the defects of the skin, and a bright and natural finish with no noticeable irregularities. is there.

Women's skin problems include worries about uneven color such as spots and dullness, and worries about unevenness such as pores and wrinkles. Recently, there is an increasing demand for makeup cosmetics, and a smooth natural finish is demanded as a final finish while correcting those drawbacks.
Conventionally, makeup cosmetics have been combined with a powder having a strong diffuse reflection to obtain a matte finish, or a powder having a strong specular reflection such as mica to have a glossy finish. In addition, in order to cover the dullness of the skin, pigments with high hiding power such as titanium oxide and iron oxide are blended, or redness such as bengara and rake pigment is added to change the skin hue sensation. . Furthermore, to hide the red face and acne scars, a green pigment that is a complementary color of red is used, and a blue or purple pigment is used to give a transparent feeling, thereby changing the skin hue sensation.

However, when a pigment with high hiding power is used, the natural feeling is lost. In addition, when the complementary color principle is used, there is a problem that although the hue can be covered, the saturation is lowered and the skin color is dull. These are caused by hue control based on subtractive color mixing, and are caused by the fact that if the colors are overlapped, the saturation is lowered and the color approaches gray.
Therefore, in order to compensate for the decrease in saturation, a method has been adopted in which an appropriate amount of a pearl pigment having a strong luster such as titanium mica is blended to give gloss. However, the finish has a strong luster in the specular reflection direction unique to the pearl pigment, and therefore, it tends to have an appearance or an unnatural finish that is different from the actual gloss of the skin.

  On the other hand, a proposal has been made to suppress strong gloss by coating a flaky pearl pigment such as titanium mica with a spherical powder. For example, Patent Document 1 discloses that a spherical fine particle of an acrylic resin is attached to the surface of a flaky pearl pigment such as mica titanium by spray drying a slurry in which spherical fine particles of an acrylic resin are dispersed in an organic solvent. It is. In Patent Document 2, plate-like powder and organic spherical powder are mechanically dry blended, and the plate-like powder is coated with organic spherical powder. However, in any case, since the spherical fine particles are simply attached to the surface of the flaky pearl pigment, there is a drawback that adhesion is weak.

  Moreover, even if the strong gloss in the specular reflection direction peculiar to mica titanium is suppressed, if a cosmetic containing titanium mica is applied to a wide area such as the entire face, the brightness of the entire face increases. As a result, there was a problem that the unevenness of the dark pore portion compared to the hide skin caused conspicuous pores, fine lines and the like due to the improvement of the lightness of the hide portion. Moreover, according to the cosmetics containing a lot of pigments with high hiding power such as titanium mica, the cosmetics have a thick makeup feeling and become opaque, so that the natural feeling of the skin is easily impaired.

Japanese Patent Laid-Open No. 9-48707 Japanese Patent Laid-Open No. 9-12430

  The object of the present invention is to use a specific composite plate-like particle and a specific spherical powder, while covering the defects of the skin, having a natural finish with a glossy and transparent feeling close to the skin, bright, and An object of the present invention is to provide a makeup cosmetic that can provide a natural finish with inconspicuous irregularities.

As a result of studies to solve the above problems, the present inventors have formulated composite plate-like particles in which organic polymer fine particles are fixed on the surface of titanium mica and a specific spherical powder into a makeup cosmetic. The inventors have found that the above object can be achieved.
That is, the present invention provides the components (A) and (B):
(A) A composite plate-like particle composed of titanium mica and organic polymer fine particles and satisfying the following conditions (1) to (4): (1) a pressure at which the composite plate-like particle is not less than the critical temperature and not less than 4 MPa (2) The average particle diameter of the organic polymer fine particles is 0.01 to 100 μm.
(3) Ratio (a / b) of average particle diameter (a) of organic polymer fine particles to average particle diameter (b) of titanium mica is 1/2000 to 1/5.
(4) The mass ratio of organic polymer fine particles to mica titanium is 0.001-1.
(B) A makeup cosmetic comprising a spherical powder having an average particle diameter of 1 to 20 μm is provided.

  The make-up cosmetic of the present invention comprises composite plate-like particles (A) in which specific organic polymer fine particles are plasticized by carbon dioxide in a supercritical state and firmly adhered to the surface of titanium mica and an average particle size of 1 to 1. Contains spherical powder (B) which is 20 μm. Therefore, the makeup cosmetics of the present invention can produce an effect of producing a bright, natural finish with high transparency, less glare, and an effect of imparting a finish with inconspicuous pores. Can do.

The makeup cosmetic of the present invention is characterized by containing specific composite plate-like particles as the component (A) and spherical powder having an average particle size of 1 to 20 μm as the component (B). .
The composite plate-like particle of the component (A) of the present invention is a composite plate-like particle comprising titanium mica and organic polymer fine particles. Here, titanium mica is an optically characteristic pearl pigment that gives a pearly luster and interference color by coating the surface of finely divided mica (plate-like particles) with titanium oxide. As the mica, which is a base material of titanium mica, muscovite, scale mica, phlogopite, biotite, artificial mica, sericite (sericite) and the like can be used. Of these, muscovite, scale mica, and phlogopite are particularly preferable.
Titanium oxide covering the surface of mica includes a rutile type, anatase type, and brookite type. Among these, a rutile type and an anatase type are preferable. Commercially available titanium mica can be used. Further, a mica titanium further coated with iron oxide, and a mica coated with a mixture of titanium oxide and iron oxide or tin oxide can also be used.

The average particle diameter of the mica titanium used is preferably 1 to 150 μm, and particularly preferably 5 to 100 μm, from the viewpoint that the organic polymer particles are not glazed and have an appropriate gloss. If the average particle size exceeds 150 μm, the gloss of titanium mica as the substrate becomes too strong, and it becomes difficult to control the gloss, and there is a risk of glare. On the other hand, when the thickness is less than 5 μm, the gloss of titanium mica as a substrate is lowered, and desired optical characteristics cannot be obtained, which is not preferable.
Said mica titanium can be used individually by 1 type or in mixture of 2 or more types.

Next, as the organic polymer fine particles, a polymer compound that swells and plasticizes by treatment with carbon dioxide at a critical temperature or higher and a pressure of 4 MPa or higher is used.
Examples of the polymer compound include a thermoplastic resin, a thermosetting resin, a fluorine polymer compound, and a silicone polymer compound.
Thermoplastic resins include acrylic resins such as polymethyl methacrylate (PMMA), polyolefin resins such as polyethylene and polypropylene, polystyrene resins, polyester resins, polyvinyl chloride resins, polyethylene terephthalate resins, polycarbonate resins, polyamide resins such as nylon, etc. Is mentioned. In these, an acrylic resin is preferable and especially polymethyl methacrylate (PMMA) is preferable.
Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, epoxy resin, and urethane resin.

  As the fluorine-based polymer compound, any polymer compound having a fluorine atom can be used without particular limitation. Among these, a homopolymer of (meth) acrylate having a perfluoroalkyl group having 4 or more carbon atoms, a polyfluoroalkyl group or a perfluoropolyether group, and an alkyl group having 8 to 22 carbon atoms with this compound A copolymer with (meth) acrylate is particularly preferred. Further, from the viewpoint of dispersibility and solubility in carbon dioxide, those having a weight average molecular weight of 3,000 to 500,000, particularly 5,000 to 300,000 are preferable.

As the silicone-based polymer compound, various polysiloxanes, modified silicones, silicone-modified acrylic resins and the like can be used without any particular limitation. Among these, poly (N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer is particularly preferable. Further, from the viewpoint of dispersibility and solubility in carbon dioxide, those having a weight average molecular weight of 500 to 500,000, particularly 1,000 to 300,000 are preferable.
Details of these fluorine-based polymer compounds and silicone-based polymer compounds are described in paragraphs [0035] to [0046] of JP-A No. 2002-210356.
The organic polymer fine particles may be used alone or in combination of two or more.

The shape of the organic polymer fine particles used in the present invention is not particularly limited, but is preferably spherical.
The average particle diameter of the organic polymer fine particles is 0.01 to 30 μm, preferably 0.05 to 20 μm, more preferably 0.1 to 3 μm.
The relationship between the average particle diameter (a) of the organic polymer fine particles and the average particle diameter (b) of the mica titanium is such that the ratio of the average particle diameter (a / b) is 1 / It is 2000-1 / 5, Preferably it is 1 / 800-1 / 10, More preferably, it is 1 / 400-1 / 20. Here, the average particle size is calculated from a volume-based particle size distribution measured by a laser diffraction / scattering method using a laser diffraction / scattering particle size distribution analyzer (for example, Horiba, Ltd., LA-920). Mean median diameter.

Next, production examples of the composite plate-like particle (A) of the present invention will be described.
The composite plate-like particles of the present invention plasticize organic polymer fine particles in a container such as an autoclave having a stirring mechanism and a pressure cell in the presence of carbon dioxide having a pressure higher than the critical temperature and 4 MPa or higher. It can be obtained by fixing on the surface and compositing. There is no restriction | limiting in particular as an apparatus used for such operation, For example, the apparatus as described in Unexamined-Japanese-Patent No. 11-47681, Unexamined-Japanese-Patent No. 2000-210356, etc. can be used.

In the present invention, it is preferable to mix organic polymer fine particles with mica titanium before the contact treatment with carbon dioxide. As a mixing method, a general powder mixing method can be used. In particular, it is preferable to dry-blend titanium mica and organic polymer fine particles in a predetermined container using a high-speed fluid mixer or the like and perform physical adhesion by stirring force.
In dry blending, in order to prevent aggregation between the organic polymer fine particles and the resulting composite plate-like particles, inorganic fine particles can coexist within a range that does not impair the object of the present invention. Examples of inorganic fine particles that can be used include silica, magnesium silicate, talc, sericite, mica, kaolin, and the like.
The average particle diameter of these inorganic fine particles is preferably smaller than the average particle diameter of the organic polymer fine particles, and is usually 0.3 μm or less, preferably 0.1 μm or less.

Next, carbon dioxide having a pressure not lower than the critical temperature and not lower than 4 MPa is introduced into the container, and the organic polymer fine particles are plasticized by the carbon dioxide. The temperature at this time depends on the plasticity of the organic polymer fine particles, but from the viewpoint of efficiently performing plasticization, the temperature is set to the carbon dioxide critical temperature (304.2 K) or higher. A preferable temperature is 310 to 370 K, more preferably 320 to 360 K, from the viewpoint of efficiently removing carbon dioxide and reducing pressure.
Further, the pressure in plasticization depends on the plasticity of the organic polymer fine particles, but is 4 MPa or more. A preferable pressure is a critical pressure (7.37 MPa) or more, more preferably 10 MPa or more. Since the density of carbon dioxide increases as the pressure increases, the fluidity of the mica titanium and the composite plate-like particles is improved, and the cohesiveness of the particles is improved. Accordingly, the pressure is preferably higher, but is preferably 50 MPa or less, more preferably 40 MPa or less, from the viewpoint of efficiently performing the cost of equipment, removing carbon dioxide, or reducing the pressure. A particularly preferable pressure is 10 to 35 MPa.

  High-pressure carbon dioxide exhibits wide solubility in organic polymer fine particles. In the presence of high-pressure carbon dioxide, the organic polymer fine particles swell due to the dissolution (sorption) of carbon dioxide. As a result, the plasticity is greatly increased even at a temperature lower than the melting point or glass transition temperature of the organic polymer fine particles. For this reason, by bringing the organic polymer fine particles into contact with high pressure, particularly carbon dioxide of 4 MPa or more, the organic polymer fine particles are plasticized and the contact area to the surface of the mica titanium is increased, thereby realizing strong fixation. Is possible.

In the case where carbon dioxide and organic polymer fine particles having a pressure equal to or higher than the critical temperature and 4 MPa or higher are brought into contact with each other, the mass ratio of the organic polymer fine particles to titanium mica is 0.001 to 1, preferably 0.01 to 0.5, More preferably, it is the range of 0.01-0.2.
The time for fixing the organic polymer fine particles to the surface of titanium mica depends on the plasticity of the organic polymer fine particles, but is usually 1 minute to 20 hours, preferably 5 minutes to 5 hours.
Further, if the inside of the container is stirred during this time, the fluidity of the mica titanium and the composite plate-like particles becomes good, and the aggregation property of the particles can be improved.

Examples of the fixing mode of the composite plate-like particle of the present invention include a mode in which the organic polymer fine particles maintain the basic shape as the particle, and the contact portion with the surface of the mica titanium is deformed and fixed. . As shown in FIG. 3, for example, when the organic polymer fine particle is a sphere before plasticization, the portion where the organic polymer fine particle is in contact with the mica titanium becomes flat and is in contact with the mica titanium on the surface. The mode is mentioned. Moreover, the aspect in which the organic polymer microparticles are not in contact with the mica titanium maintains a substantially spherical shape. In addition, when the organic polymer fine particles are adjacent to each other, a part of the organic polymer fine particles are fused to each other by plasticization, and in some cases, a network shape is obtained.
In the ordinary spray drying method or dry blending method, as shown in FIG. 4, when the organic polymer fine particles are true spheres, they are almost adhered to the surface of titanium mica as they are substantially true spheres. On the other hand, the composite plate-like particles used in the present invention have the above structural characteristics, and thus exhibit the unique effects of the present invention.

  Furthermore, the composite plate-like powder of the present invention can be subjected to a fluorine-based or silicone-based coating treatment usually applied to cosmetic powders. For example, when supercritical processing is performed in the presence of carbon dioxide, a fluorine compound or silicone compound that can be used as a coating agent is allowed to coexist in the container, and a part or all of the resulting composite plate-like particles are coated. You can also In this case, a part or all of the surface of titanium mica and / or organic polymer fine particles used as a raw material for the composite plate-like particles may be coated with a fluorine compound and / or a silicone compound in advance. As the fluorine-based compound and the silicone-based polymer compound, a fluorine-based or silicone-based compound that is generally used as a surface coating agent can be used.

Further, in order to promote plasticization of the organic polymer fine particles, a plasticizer can coexist with carbon dioxide. The plasticizer is preferably one that can be dissolved or emulsified in carbon dioxide at a critical temperature or higher and a pressure of 4 MPa or higher.
Examples of the plasticizer that can be used include 2-ethylhexyl p-methoxycinnamate, phthalic acid ester, phosphoric acid ester, aliphatic monobasic acid ester, aliphatic dibasic acid ester, dihydric alcohol ester, and oxyacid ester. Etc.
In addition, in the case where the organic polymer fine particles are a substance that is not easily plasticized by carbon dioxide, a cosolvent may be added as an entrainer to promote plasticization. The cosolvent is preferably a polar solvent, and examples thereof include alcohol, acetone, ethyl acetate, methyl ethyl ketone, and water. The alcohol is preferably ethanol and 1-propanol, more preferably ethanol.

The process after the organic polymer fine particles are fixed to the surface of titanium mica is to remove carbon dioxide. As a removal method, a method of reducing the pressure of carbon dioxide can be used. That is, by reducing the pressure of carbon dioxide, the solubility of carbon dioxide in the organic polymer fine particles is drastically reduced, so that the organic polymer fine particles and carbon dioxide can be separated only by a pressure reduction operation. For example, the composite plate-like particles in the container can be separated from the carbon dioxide by reducing the pressure in the container to atmospheric pressure. The time required for reducing the pressure to atmospheric pressure depends on the apparatus, but is usually 2 seconds to 5 hours, preferably 5 seconds to 2 hours.
As another method, the mixture in the container is discharged out of the container, carbon dioxide is separated and removed from the mixture at the time of discharge, and composite plate-like particles without aggregation can be obtained. The discharge conditions are not particularly limited, but it is desirable from the viewpoint of a supercritical fluid that the temperature at the inflow portion of the nozzle is higher than the critical temperature and the pressure is higher than the critical pressure.

The composite plate-like particles of the present invention obtained as described above are those in which organic polymer fine particles are plasticized with carbon dioxide at a critical temperature or higher and a pressure of 4 MPa or higher and firmly adhered to the surface of titanium mica. In addition, the average particle diameter of the organic polymer fine particles is 0.01 to 30 μm, preferably 0.05 to 20 μm, and more preferably 0.1 to 3 μm. The ratio (a / b) of the average particle diameter (a) of the organic polymer fine particles to the average particle diameter (b) of mica titanium is 1/2000 to 1/5, preferably 1/800 to 1/10. It is preferably 1/400 to 1/20. Further, the mass ratio of the organic polymer fine particles to titanium mica is 0.001-1, preferably 0.01-0.5, more preferably 0.01-0.2.
The composite plate-like particles are useful as various powders for make-up cosmetics because they can provide a transparent feeling while having sufficient covering power on the coated surface.

The composite plate-like particle of the present invention can be subjected to water repellency and / or oil repellency treatment before blending into the makeup cosmetic. Water repellent and / or oil repellent treatment is carried out by treating the composite plate-like particle surface with a silicone compound such as dimethylpolysiloxane and methylhydrogenpolysiloxane, a fluorine compound such as perfluoroalkyl phosphate compound, lecithin, amino acid, polyethylene, It can be performed by treating with metal soap or the like.
In order to further improve the feeling of use, surface treatment with sphingosine analogs, sterols and fatty acids described in JP-A No. 11-49634 can be used to bring out the effect of making the skin feel smooth and smooth. It is possible to obtain a cosmetic that has good moisture and is excellent in moisture effect and has no skin irritation.

Next, the spherical powder as the component (B) will be described. In the present invention, “spherical” is a term used from the viewpoint of exhibiting a function of suppressing regular reflection and / or irregular reflection of titanium mica, and is not necessarily a true sphere. For example, it may be a substantially spherical one, a spheroid, and a spherical powder having irregularities on the surface. Moreover, not only spherical particles but also spherical particles as aggregates or composites are included.
As such a spherical powder, an organic polymer compound or an inorganic compound can be used.

As the organic polymer compound, a thermoplastic resin or a thermosetting resin can be used.
As thermoplastic resins, polyamide resins such as nylon 66 and nylon 6; polymethylsilsesquioxane, dimethicone crosspolymer, (lauryl dimethicone / PEG) crosspolymer, (dimethicone / vinyl dimethicone / methicone) crosspolymer, cross-linked alkyl Silicone resins such as polyether-modified silicones; acrylic resins such as polymethyl methacrylate (PMMA), polymethacrylic acid (PMAA), methyl methacrylate / dimethylpolysiloxane copolymer; polyolefin resins such as polyethylene and polypropylene; polyethylene terephthalate Polyester resin; polystyrene resin; polycarbonate resin; polyvinyl chloride resin; cellulose; silk powder and the like.

  Examples of inorganic compounds include metal oxides such as alumina, silica, zirconia, titanium oxide, zinc oxide and iron oxide; zeolites such as A-type zeolite, X-type zeolite and Y-type zeolite; sulfates such as barium sulfate; calcium carbonate and the like And carbonates thereof.

In the present invention, it is also possible to use powders in which the above organic polymer compounds and inorganic compounds are combined, and powders in which an ultraviolet absorber or the like is included. For example, a metal oxide-encapsulated silica encapsulating titanium oxide, zinc oxide, iron oxide, etc .; a spherical powder encapsulating a sintered material such as the metal oxide or alumina silicate; Examples of powders include spherical powders in which polymers are concentrically stacked in multiple layers.
Among these spherical powders, polyamide resin, silicone resin, acrylic resin, and polyolefin resin are preferable from the viewpoint of slipperiness, and polyamide resin and silicone resin are particularly preferable.
These spherical powders can be used singly or in combination of two or more.

  The average particle size of the spherical powder (B) is 1 to 20 μm. If the average particle size of the spherical powder is within this range, it will not be buried in the decorative film, so it will have a blurring effect (an effect that blurs the boundary of uneven parts such as pores and fine lines) and the pores are not noticeable. It has the effect of giving a finish, and the feeling of use becomes smooth. When the average particle size is in the range of 3 μm to 15 μm, the feeling of use becomes smoother, and it is easy to adhere uniformly to the concavo-convex portion, so that the blurring effect is sufficiently manifested, so that it is more preferable. Here, the average particle diameter is the same as described above.

  Further, the refractive index of the spherical powder (B) is preferably 1.3 to 1.8, and more preferably 1.4 to 1.6. When the refractive index of the spherical powder is within this range, it is possible to sufficiently suppress the glare and express the blurring effect, and to obtain a more natural finish feeling.

  The spherical powder (B) of the present invention can be subjected to water repellency and / or oil repellency treatment in advance before blending into the makeup cosmetic. The conditions for the water and / or oil repellent treatment are the same as the conditions for the water and / or oil repellent treatment of the composite plate-like particles described above.

  The make-up cosmetics of the present invention include powdered white powder, solid white powder, face powder, solid powdery foundation, oily foundation, creamy foundation, liquid foundation, concealer, blusher, eye shadow and the like.

The content of the composite plate-like particles (A) in these makeup cosmetics is 1 to 50% by mass from the viewpoint of avoiding unnaturalness due to a strong glossiness while sufficiently exerting the content effect. Preferably it is the range of 2-30 mass%.
More specifically, in the case of powdered white powder, solid white powder and face powder, 0.1 to 30% by mass, particularly 0/5 to 30% by mass, in the case of solid powdery foundation and oily foundation, 0.1 to 30% by mass. %, Especially 0.5-30% by weight, 0.1-30% by weight for creamy foundations, liquid foundations and concealers, especially 0.5-25% by weight, 0.1% for blushers and eyeshadows. It is preferable to make it contain 30 mass%, especially 0.5-25 mass%.

  The content of the spherical powder (B) in the makeup cosmetic varies depending on the dosage form of the cosmetic and is not generally limited. However, it is usually preferably about 0.1 to 30% by mass. More preferably, it is made into 20 mass%. When the content of the spherical powder is within the above range, it is preferable because the effect of making the unevenness inconspicuous is excellent and the feeling of use is good.

In the makeup cosmetic of the present invention, in addition to the composite plate-like particles, if necessary, components usually used in cosmetics such as pigments, water-soluble polymers, oils, surfactants, antioxidants , Fragrances, pigments, preservatives, ultraviolet absorbers, humectants, refreshing agents, and the like.
Among these, in particular, when a pigment is used, it is preferable from the viewpoint of makeup sustainability to perform a water repellency and / or oil repellency treatment in advance. As the water and / or oil repellent treatment agent, the same compounds as those used for the water and / or oil repellent treatment agent of the composite plate-like particles can be used.

The make-up cosmetic of the present invention can be produced by uniformly mixing the above-mentioned components by a conventional method.
For example, when producing powdered white powder, solid white powder, face powder, solid powdered foundation, blusher, eye shadow, etc., it is produced according to a conventional method using a Henschel mixer, retro mixer, Hobart mixer, planetary mixer, kneader, etc. be able to.

Production Example 1
Titanium mica (average particle size: 45μm, ECKART Gmbh & Co. KG) 21.90g and spherical PMMA (average particle size 0.3μm, Soken Chemical Co., Ltd.) 1.10g high-speed fluidized mixer super mixer (product) Name: Piccolo SMP-2, inner volume 0.3 L, Kawata Co., Ltd.) and mixed at 3000 rpm for 5 minutes to obtain a premixed powder.
Next, after filling the autoclave (internal volume 500 mL: AKIKO Co., Ltd.) with 23.00 g of the premixed powder, carbon dioxide gas or liquefied carbon dioxide is supplied, and a condenser at which a refrigerant of −5 ° C. is passed. The carbon dioxide was condensed and the pressure was increased with a pressure pump.
The stirrer was turned, carbon dioxide was preheated and introduced into the autoclave, and the temperature was adjusted to 296 K and the pressure was 6.2 MPa. Thereafter, the temperature was adjusted to 353 K and the pressure was adjusted to 25.0 MPa, and the mixture was kept under these conditions for 0.5 hours, then evacuated and decompressed for 10 minutes. At this time, the temperature inside the container was adjusted so as not to become 313K or lower, and the temperature inside the container at the end of the decompression was 326K. The internal pressure of the autoclave was reduced to atmospheric pressure to obtain composite plate-like particles. In this composite plate-like particle, the average particle size of PMMA particles is 0.3 to 0.5 μm, the ratio of the average particle size of PMMA fine particles / titanium mica is 1/150, and PMMA fine particles contain 1 mass of mica titanium. It is fixed to the part in an amount of 0.05 part by mass.
Scanning electron micrographs of the obtained composite plate-like particles are shown in FIG. 1 (magnification: 1,000 times), FIG. 2 (magnification: 10,000 times), and FIG. 3 (magnification: 30,000 times). 1 to 3, it can be seen that the PMMA particles swell and plasticize, the contact surface with titanium mica is flattened, and is dispersed and fixed widely on the titanium mica surface. Further, it can be seen that for some PMMA particles, adjacent particles are fused.

Production Example 2
In Production Example 1, composite plate-like particles were obtained in the same manner as in Production Example 1, except that the amount of titanium mica was changed to 20.90 g and the amount of PMMA was changed to 2.10 g. The obtained composite plate-like particles have an average particle diameter of PMMA particles of 0.3 to 0.5 μm, an average particle diameter ratio of PMMA fine particles / titanium mica of 1/150, and PMMA fine particles are mica titanium. It is fixed in an amount of 0.1 part by mass with respect to 1 part by mass. The composite plate-like particles were fixed in a larger area on the surface of the mica titanium as compared with the composite plate-like particles obtained in Production Example 1, but the fixed state was the same.

Comparative production example 1
In the same manner as in Production Example 1, mica titanium and spherical PMMA were mixed to obtain a premixed powder. A scanning electron micrograph of the obtained composite plate-like particle is shown in FIG. 4 (magnification: 30,000 times). From FIG. 4, it can be seen that the PMMA particles that were almost spherical were only adhered on the surface of the mica titanium while remaining almost spherical.

Examples 1-2 and Comparative Examples 1-5 (Preparation of solid powdery foundation)
Components (1) to (13) shown in Table 1 (composite plate particles (A), spherical powder (B), pigment, thickener, etc. of the present invention) are mixed and ground. This is transferred to a high-speed blender, and components (14) and (15) mixed and dissolved at 80 ° C. are added and mixed uniformly. Ingredient (16) is added to the mixture, mixed and then ground again and passed through a sieve. This was compressed into a metal pan (solid powder foundation container) and molded.
(Evaluation methods)
Each of the products of the present invention and comparative products shown in Table 1 were used by 20 panelists specializing in cosmetics. According to the following evaluation criteria, “transparent finish”, “bright finish”, “natural skin color”, “glare” "None" and "Unevenness is not noticeable" were evaluated. The average value of the evaluation results is shown in Table 1.
Evaluation criteria 5 points: very good 4 points: good 3 points: normal 2 points: slightly bad 1 point: bad

  The solid powdered foundations of Examples 1 and 2 had a clear, natural skin-colored bright finish with very little glare and inconspicuous pores. On the other hand, the solid powdered foundations of Comparative Examples 1 to 4 had pores conspicuous.

Example 3 (Preparation of creamy foundation)
The following components (11) to (14) (composite plate-like particles (A), spherical powder (B), pigments of the present invention) are mixed and ground. Separately, a solution in which the aqueous phase components (7) to (10) are mixed is prepared, and the pulverized pigment is added and dispersed, followed by heating to 75 ° C. The oil phase components (1) to (6) heated and dissolved at 80 ° C. are added to the previously prepared aqueous phase with stirring and emulsified. This was cooled with stirring, the component (15) was added at 50 ° C., and the mixture was cooled with stirring to obtain a creamy foundation.
The resulting creamy foundation had a clear, natural skin-colored bright finish, very little glare, and inconspicuous pores.
(Ingredient) (mass%)
(1) Stearic acid 5.5
(2) Glycerol monostearate 2.5
(3) Cetostearyl alcohol 1
(4) Monolauryl propylene glycol 3
(5) Squalane 7
(6) Olive oil 8
(7) Purified water Balance (8) Preservative appropriate amount (9) Triethanolamine 1.2
(10) Sorbit 3
(11) Titanium oxide 10
(12) Polymethylsilsesquioxane powder ^{* 3} 5
(“Tospearl 145”, average particle size: 5 μm, GE Toshiba Silicone Corporation)
(13) Colored pigment (Bengara, yellow iron oxide, black iron oxide) Appropriate amount (14) Composite plate-like particle of Production Example 1 5
(15) Fragrance Amount Trace Total 100

Example 4 (Preparation of white powder)
All the following components (complexed plate-like particles (A), spherical powder (B), pigment, etc. of the present invention) were mixed, pulverized through a pulverizer, and passed through a sieve to prepare powdered white powder.
The obtained powdery white powder had a clear, natural skin-colored bright finish, very little glare, and pores were inconspicuous.
(Ingredient) (mass%)
(1) Mica balance (2) Composite plate-like particle of Production Example 2 15
(3) Zinc oxide 5
(4) Spherical nylon 15
(Toray Industries, Inc. SP-500, average particle size: 6μm)
(5) Titanium oxide 0.5
(6) Bengala 0.3
(7) Yellow iron oxide 0.1
(8) Black iron oxide 0.01
(9) Magnesium stearate 10
(10) Preservative appropriate amount (11) Perfume Trace Total 100

Example 5 (Preparation of solid white powder)
The following components (1) to (7) (composite plate-like particles (A), spherical powder (B), pigment) of the present invention are mixed and ground, transferred to a high-speed blender, and further components (8) to (10 ) Is mixed and dissolved at 80 ° C. and mixed uniformly. Component (11) is added to the mixture and mixed, then ground again and passed through a sieve. This was compressed and molded into a metal pan (white powder container).
The obtained solid white powder had a clear, natural skin-colored bright finish, very little glare, and pores were inconspicuous.
(Ingredient) (mass%)
(1) Mica balance (2) Composite plate-like particles of Production Example 1 (treated with dimethylpolysiloxane) 15
(3) Compounded plate-like particles (treated with dimethylpolysiloxane) of Production Example 2 10
(4) Spherical nylon 10
(Toray Industries, Inc. SP-500, average particle size: 6μm)
(5) Zinc oxide 5
(6) Titanium oxide 0.5
(7) Black iron oxide 0.01
(8) Liquid paraffin 8
(9) Beeswax 2
(10) Preservative appropriate amount (11) Perfume Trace Total 100

Example 6 (Preparation of blusher)
The following components (1) to (7) (composite plate particles (A) of the present invention, spherical powder (B), pigment, softener, etc.) were mixed and developed. Next, components (8) to (10) were sprayed and added in a mixer, mixed uniformly, passed through a sieve, and then compressed into a metal pan (blusher container) using a press to solidify.
The resulting blusher had a bright, natural skin color with a clear feeling, very little glare and inconspicuous pores.
(Ingredient) (mass%)
(1) Mica balance (2) Composite plate-like particle of Production Example 2 20
(3) Polyurethane powder ^{* 5} 10
(Toyo Pigment Co., Ltd. D-400, average particle size: 10μm)
(4) Titanium oxide 4
(5) Zinc stearate 5
(6) Rice starch 5
(7) Color material 3
(8) Liquid paraffin 3
(9) Preservative appropriate amount (10) Fragrance Amount Trace Total 100

Example 7 (Preparation of liquid foundation)
After the following components (4) to (6) are dissolved at room temperature, components (1) to (3) (composite plate particles (A), spherical powder (B), pigments, etc. of the present invention) are added. The components (7) and (8) were added with stirring and emulsified to prepare a liquid foundation.
The obtained liquid foundation had a bright finish with a transparent natural skin color, very little glare, and inconspicuous pores.
(Ingredient) (mass%)
(1) Hydrophobized pigment Titanium oxide (treated with methylhydrogenpolysiloxane) 1.0
Iron oxide (red, yellow, black) appropriate amount (treated with methyl hydrogen polysiloxane)
(2) Polymethylsilsesquioxane powder 4.0
(“Tospearl 145”, average particle size: 5 μm, GE Toshiba Silicone Corporation)
(3) Composite powder of Production Example 1 5.0
(Methyl hydrogen polysiloxane treatment)
(4) Octamethylcyclotetrasiloxane 20.0
(5) Dimethylpolysiloxane 10.0
(KF-96A, Shin-Etsu Chemical Co., Ltd.)
(6) Dimethylpolysiloxane / polyoxyalkylene copolymer 1.0
("SH3775C", Toray Dow Corning Silicone Co., Ltd.)
(7) Glycerin 2.0
(8) Purified water balance Total 100

2 is a scanning electron micrograph (magnification: 1,000 times) showing the appearance of the composite plate-like particles obtained in Production Example 1. FIG. 2 is a scanning electron micrograph (magnification: 10,000 times) showing the appearance of the composite plate-like particles obtained in Production Example 1. FIG. 2 is a scanning electron micrograph (magnification: 30,000 times) showing the appearance of the composite plate-like particles obtained in Production Example 1. FIG. 4 is a scanning electron micrograph (magnification: 30,000 times) showing the appearance of the premixed powder obtained in Comparative Production Example 1.

Claims (6)

(A) component and (B) component:
(A) A composite plate-like particle composed of titanium mica and organic polymer fine particles and satisfying the following conditions (1) to (4): (1) a pressure at which the composite plate-like particle is not less than the critical temperature and not less than 4 MPa Organic polymer fine particles fixed to the surface of titanium mica in the presence of carbon dioxide (2) The average particle size of the organic polymer fine particles is 0.01 to 30 μm
(3) Ratio (a / b) of average particle diameter (a) of organic polymer fine particles to average particle diameter (b) of titanium mica is 1/2000 to 1/5.
(4) The mass ratio of organic polymer fine particles to mica titanium is 0.001-1.
(B) A makeup cosmetic comprising a spherical powder having an average particle diameter of 1 to 20 μm.   The makeup cosmetic according to claim 1, wherein the ratio (a / b) of the average particle size (a) of the organic polymer fine particles to the average particle size (b) of titanium mica is 1/800 to 1/10.   The makeup cosmetic according to claim 1 or 2, wherein the organic polymer fine particles are fine particles of polymethyl methacrylate.   The makeup cosmetic according to any one of claims 1 to 3, wherein the component (B) is an organic polymer spherical powder.   The makeup cosmetic according to any one of claims 1 to 4, wherein the component (B) is a spherical powder made of a polyamide resin and / or a silicone resin. The makeup cosmetic according to any one of claims 1 to 5, comprising 1 to 50% by mass of component (A) and 0.1 to 30% by mass of component (B).

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