WO2019003756A1 - 固形粉末化粧料 - Google Patents

固形粉末化粧料 Download PDF

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Publication number
WO2019003756A1
WO2019003756A1 PCT/JP2018/020374 JP2018020374W WO2019003756A1 WO 2019003756 A1 WO2019003756 A1 WO 2019003756A1 JP 2018020374 W JP2018020374 W JP 2018020374W WO 2019003756 A1 WO2019003756 A1 WO 2019003756A1
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Prior art keywords
powder
titanium dioxide
mass
acid
component
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PCT/JP2018/020374
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English (en)
French (fr)
Japanese (ja)
Inventor
木村元春
秦英夫
大澤友
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株式会社 資生堂
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Priority to CN201880041549.1A priority Critical patent/CN110769802B/zh
Publication of WO2019003756A1 publication Critical patent/WO2019003756A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/29—Titanium; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89—Polysiloxanes
    • A61K8/896—Polysiloxanes containing atoms other than silicon, carbon, oxygen and hydrogen, e.g. dimethicone copolyol phosphate
    • A61K8/898—Polysiloxanes containing atoms other than silicon, carbon, oxygen and hydrogen, e.g. dimethicone copolyol phosphate containing nitrogen, e.g. amodimethicone, trimethyl silyl amodimethicone or dimethicone propyl PG-betaine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/02—Preparations containing skin colorants, e.g. pigments
    • A61Q1/10—Preparations containing skin colorants, e.g. pigments for eyes, e.g. eyeliner, mascara
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/12—Face or body powders for grooming, adorning or absorbing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q15/00—Anti-perspirants or body deodorants

Definitions

  • the present invention relates to a solid powder cosmetic, and more particularly to a solid powder cosmetic having an excellent finish and usability, a function of transmitting light in a long wavelength region (red light selective transmission function) while maintaining hiding power. .
  • Titanium dioxide is widely used as a white pigment for paints, plastics, etc. because it has a high refractive index and is excellent in whiteness, hiding power and coloring power.
  • titanium dioxide can be used as a UV absorber or UV screening agent as a substance that blocks UV light by controlling its particle size or light activity, as a UV absorber or UV screening agent in applications such as cosmetics and catalysts. Due to the fact, in recent years, research and development for these applications have been actively conducted.
  • the cosmetic of the present invention can be obtained by using titanium dioxide powder of apparent specific average particle size formed from small spherical particles of titanium dioxide of marimo-like specific average particle size formed from a large number of titanium dioxide. It is known that titanium dioxide becomes a functional material capable of imparting good slidability and excellent light resistance which are not present in titanium dioxide. (Patent Document 1).
  • titanium oxide having enhanced transmittance of light on the long wavelength side of light in the form of particles in which rod-like particles are oriented and aggregated in a bundle, apparent average major axis length of oriented and aggregated particles 80 to 300 nm, orientation aggregation Rutile showing a specific surface area of 120 to 180 m 2 / g with an apparent average minor axis length of 30 to 150 nm and an apparent average major axis ratio represented by apparent average major axis length / apparent average minor axis length of 1.1 to 4 It is known that a strip-like or a bundle-like rutile-type titanium oxide which is a type titanium oxide has been developed, and it is known that both the transparency and the ultraviolet shielding ability are high (Patent Document 4).
  • this titanium dioxide is an aggregate of rod-like particles and there are many voids in the secondary aggregate, the apparent refractive index is lowered, and the hiding power is actually required to be added to cosmetics. It was inadequate.
  • the apparent particle size of secondary aggregates is also less than 100 nm, which is clearly smaller than the particle size that maximizes the scattering effect of titanium oxide based on Mie's theory. Therefore, this also causes a small hiding power.
  • the present invention has been made in view of the above-mentioned prior art, and the problem to be solved is to transmit light in a long wavelength region while maintaining the hiding power while being excellent in impact resistance and usability. It is providing the solid powder cosmetics excellent in the function (red light selective transmission function).
  • titanium dioxide having a specific particle diameter, a specific crystallite diameter, and a specific surface area which is obtained by firing a specific titanium dioxide, is a cosmetic. It has been found that the red light selective transmission function is excellent while having sufficient hiding power required for food. And what blended the specific surface-treated talc and the spherical powder into the titanium dioxide, while having excellent usability and impact resistance, has a natural finish and no white floating when applied to the skin I understood.
  • the titanium dioxide powder according to the present invention has an apparent average particle diameter of 100 nm or more and less than 500 nm, an average crystallite diameter of 15 to 30 nm measured by X-ray diffractometry, and a specific surface area of 10 to 30 m 2 / g
  • titanium dioxide powder 1 to 30% by mass of titanium dioxide powder to be characterized 5 to 30% by mass of spherical powder, It is characterized in that it comprises 5 to 40% by mass of an elastomer or metal soap surface-treated powder consisting of the following components (A) and (B).
  • the component (A) is a side chain type amino-modified silicone represented by the following general formula (1) .
  • X is an alkyl group having 1 to 18 carbon atoms
  • R and R ′ are alkyl groups.
  • Powder powder cosmetics. In the formula, R 1 and R 2 each represent a methyl group or a group represented by the following [Chemical formula 3], which contains 1 to 100 in one molecule, and y represents an integer of 1 to 50,000.
  • the solid powder cosmetic composition according to the present invention has an average crystallite diameter of 15 to 30 nm, a specific surface area of 10 to 30 m 2 / g, and a 450 nm reflectance value of 650 nm as measured by X-ray diffraction method.
  • Rutile titanium dioxide powder having a color difference ( ⁇ E) of not more than 1.3 times the value of reflectance, and 1 to 30% by mass, 5 to 30% by mass of spherical powder, It is characterized in that it comprises 5 to 40% by mass of an elastomer or metal soap surface-treated powder consisting of the following components (A) and (B).
  • the color difference ( ⁇ E) is obtained by dispersing and mixing titanium dioxide powder in a nitrocellulose lacquer so as to have a concentration of 5%, and the obtained dispersion being 0.101 ⁇ m on a black-and-white hiding factor test paper JIS-K5400.
  • test sample coated and dried by film thickness and the test sample was obtained.
  • the obtained test sample was subjected to colorimetry on the surface of the coating on white and black paper with a spectrocolorimeter.
  • the color difference ( ⁇ E) in the Hunter Lab color space was calculated.
  • the solid powder cosmetic composition according to the present invention is a rutile titanium dioxide powder obtained by firing rutile titanium dioxide having needle-like projections on the surface of particles satisfying the following (a) to (c), 1 to 30 mass% of titanium dioxide powder having an average particle diameter of 100 nm or more and less than 500 nm, an average crystallite diameter of 15 to 30 nm measured by X-ray diffraction, and a specific surface area of 10 to 30 m 2 / g , 5 to 30% by mass of spherical powder, It is characterized in that it comprises 5 to 40% by mass of an elastomer or metal soap surface-treated powder consisting of the following components (A) and (B). And solid powder cosmetics characterized in that it contains.
  • (A) Apparent average particle diameter is 100 nm or more and less than 500 nm (b) Average crystallite diameter is 1 to 25 nm as measured by X-ray diffraction (C) The specific surface area is 40 to 200 m 2 / g (A) a silicone polymer having an amino group, (B) a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group, Wherein the molar ratio of amino groups to carboxyl groups is Y / X 0.1 to 1.2 (Y is the molar amount of carboxyl groups contained in component (B), X is (A)
  • the solid powder cosmetic composition according to the present invention which is in the range of the molar amount of amino group contained in the component), comprises calcinated rutile titanium dioxide having needle-like projections on the particle surface satisfying the following (a) to (c) Rutile type titanium dioxide powder obtained by sintering, wherein the specific surface area of the rutile type titanium dioxide powder after calcination is 8
  • solid powder cosmetics characterized in that it contains.
  • A Apparent average particle diameter is 100 nm or more and less than 500 nm
  • B Average crystallite diameter is 1 to 25 nm as measured by X-ray diffraction
  • the specific surface area is 40 to 200 m 2 / g
  • A a silicone polymer having an amino group
  • B a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group
  • Y is the molar amount of carboxyl groups contained in component (B)
  • X is
  • the calcining temperature of titanium dioxide is 500 ° C. to 800 ° C. in the solid powder cosmetic composition in the range of the molar amount of the amino group contained in the component).
  • the calcination temperature of titanium dioxide is preferably 550 ° C. to 750 ° C.
  • a solid powder cosmetic composition excellent in impact stability, finish and usability, and a function (red light selective transmission function) capable of transmitting light in a long wavelength region while maintaining hiding power. can do.
  • the titanium dioxide powder according to the present invention can be obtained by firing titanium dioxide having needle-like projections on the surface of particles in which rod-like or needle-like particles are oriented and aggregated radially, at 500 to 800 ° C., more preferably 550 to 750 ° C. Titanium dioxide powder having an average crystallite diameter of 15 to 30 nm as measured by X-ray diffraction, and an apparent average particle diameter of titanium dioxide of 100 to 500 nm, preferably 200 to 400 nm, specific surface area Is 10 to 30 m 2 / g.
  • Tianium dioxide used for mother nucleus The crystal form of titanium dioxide used for the mother nucleus is anatase type and rutile type due to the difference in crystal structure.
  • the crystal form of titanium dioxide used in the present invention needs to be a rutile type having a high photocatalytic activity and a high hiding power due to a high refractive index.
  • the rutile type titanium dioxide used for the mother nucleus is titanium dioxide having a red light transmitting function.
  • the apparent average particle size of titanium dioxide used for the mother nucleus realizes the hiding power by the scattering of titanium dioxide obtained in the present invention and the excellent red transmission function, considering that the shrinkage phenomenon generally occurs after firing.
  • the thickness is preferably 100 nm or more and less than 500 nm, and more preferably 200 to 400 nm.
  • Examples of the shape of rutile type titanium dioxide used for the mother nucleus include a bowl shape, a bowl bundle shape, a strip shape, a spherical shape, a needle shape, a rod shape and the like.
  • the specific surface area of titanium dioxide used for the mother nucleus is preferably 40 to 200 m 2 / g from the viewpoint of efficient apparent refractive index improvement by firing.
  • the rutile type titanium dioxide used for the mother nucleus preferably has an average crystallite diameter of 1 to 25 nm as measured by X-ray diffraction.
  • the titanium dioxide used for the mother nucleus may be a commercially available product.
  • ST700 series manufactured by Titanium Industry Co., Ltd. may be mentioned.
  • ST710 and the like can be mentioned.
  • titanium dioxide powder used in the present invention The titanium dioxide powder of the present invention is obtained by calcining titanium dioxide used as a mother nucleus.
  • the firing temperature is determined by an apparatus for performing firing, and needle-like protrusions protruding radially from the particle surface existing before firing are present in the particles which are coagulated by firing, and are coagulated by the firing, so as to be between the needle-like particles. It is desirable that the temperature conditions be such that the existing voids are reduced, and the needle particles are sintered together so that the average crystallite size measured by the X-ray diffraction method does not excessively increase. This makes it possible to achieve both sufficient hiding power and the red light selective transmission function.
  • the titanium dioxide powder used in the present invention is characterized in that the needle-like projections protruding radially from the particle surface existing before firing are in the shape of particles condensed by firing. And, it is characterized in that the ratio (major axis / minor axis) of the minor axis to the major axis of the particle is 1.0 or more and less than 2.5. More preferably, it is 1.0 to 2.0.
  • the suitable firing temperature varies depending on the firing apparatus, it is desirable to perform firing in the range of 500 to 800 ° C., more preferably 550 to 750 ° C. when firing in a muffle furnace or rotary kiln which is a general firing furnace.
  • the temperature is lower than 500 ° C., the hiding power is not sufficient because the voids existing before firing are not sufficiently reduced, and when the temperature exceeds 800 ° C., sintering progresses excessively and the red light selective transmission function is lost.
  • the titanium dioxide of the present invention needs to have an average crystallite diameter of 15 to 30 nm as measured by X-ray diffraction.
  • the crystallite diameter of less than 15 nm is not preferable because sufficient hiding power can not be obtained.
  • it exceeds 30 nm it is unpreferable at the point that sintering will advance and a sufficient red light selective transmission function will be lost.
  • the titanium dioxide powder of the present invention has an average particle diameter of 100 nm or more and less than 500 nm, more preferably 200 to 400 nm, from the viewpoint of effectively realizing hiding power due to scattering and excellent red transmission function. It is necessary to be there.
  • the specific surface area of the titanium dioxide powder used in the present invention is an index indicating the decrease in porosity and the progress of sintering of the obtained titanium oxide particles, and the specific surface area of the titanium dioxide powder to be the mother core after firing is The range of 8 to 50% compared to that before firing (100%) is preferable. More preferably, it is 8 to 30%.
  • the specific surface area of the titanium dioxide powder of the present invention is required to be 10 to 30 m 2 / g. If it is less than 10 m 2 / g, sintering proceeds, which is not preferable in that sufficient red light selective transmission function is lost. Moreover, when it exceeds 30 m ⁇ 2 > / g, a space
  • the titanium dioxide powder of the present invention can also be subjected to surface treatment after firing. By performing the surface treatment, it is possible to obtain titanium dioxide excellent in usability while improving the viscosity, the dispersibility in oil, and the cosmetic durability associated with water repellency.
  • Examples of the inorganic substance that can be used as the surface treatment agent include hydrated oxides or oxides of metals such as aluminum, silicon, zinc, titanium, zirconium, iron, cerium and tin.
  • the metal salt used for this is not particularly limited.
  • Fatty acids such as acid, myristic acid, palmitic acid and behenic acid, methyl hydrogen polysiloxane, dimethicone, alkyl (C8 to C18 etc.) trialkoxysilane, amino modified silicone, silicone compound such as carboxyl modified silicone, perfluoroalkyl alkyl phosphate
  • fluorine compounds such as salts, dextrin myristate, dextrin palmitate, amino acid derivatives such as lauroyl lysine and lauroyl glutaminate, and the like.
  • These surface treatment agents are preferably 1 to 10% by mass with respect to the titanium dioxide powder because of high hiding power.
  • the titanium dioxide powder used in the present invention can be widely blended in cosmetics, pigments, inks, paints and the like.
  • the compounding amount of titanium dioxide used in the present invention is 1 to 30% by mass, more preferably 5 to 15% by mass, with respect to the total weight of the powder cosmetic. If it is less than 1% by mass, the effect of the titanium dioxide composition of the present invention may not be obtained, and if it exceeds 30% by mass, the finish may be unnatural.
  • the raw material of the spherical powder compounded with respect to the cosmetics of this invention will not be specifically limited if it is a raw material of the spherical powder which can be normally mix
  • elastic spherical powder for example, refill, urepearl, plastic powder
  • examples thereof include ethylene, silicon dioxide (silica), a copolymer resin of styrene and acrylic acid, benzoguanamine resin, cellulose and the like.
  • the said spherical powder may be surface-treated.
  • the surface treatment include silicone compound treatment, fluorine modified silicone compound treatment, fluorine compound treatment, higher fatty acid treatment, higher alcohol treatment, fatty acid ester treatment, metal soap treatment, metal soap treatment, amino acid treatment, alkyl phosphate treatment and the like.
  • KSP 100 Shin-Etsu Chemical Co., Ltd.
  • KSP-300 Shin-Etsu Chemical Co., Ltd.
  • nylon SP-500 Toray Co., Ltd.
  • D-400 T ⁇ color pigment Co., Ltd.
  • the particle diameter (average particle diameter) of the spherical powder is preferably in the range of 1 to 30 ⁇ m in terms of feel in use, and particularly preferably in the range of 3 to 20 ⁇ m.
  • the cosmetic of the present invention may contain one or more spherical powders.
  • the blending amount of the spherical powder in the cosmetic of the present invention is 5 to 30% by mass, preferably 10 to 20% by mass with respect to the cosmetic. If the compounding amount exceeds 30% by mass, the formability tends to be extremely deteriorated, and if it is less than 5% by mass, it becomes difficult to impart sufficient extensibility to the product.
  • the amount of the elas otomer-treated or metal soap-treated talc is preferably 5 to 40% by mass in the cosmetic, and more preferably 15 to 35% by mass. If the amount is more than 40% by mass, removal of the cosmetic may be deteriorated. If it is less than 5% by mass, a cosmetic having sufficient impact resistance may not be obtained.
  • the elastomer according to the present invention is produced by mixing and heating a silicone polymer having an amino group and a silicone polymer having a carboxyl group.
  • the silicone polymer having (A) amino group used in the present invention is a side-chain amino-modified silicone represented by the following general formula (1).
  • X is an alkyl group having 1 to 18 carbon atoms, and R and R ′ are alkyl groups.
  • m is preferably 20 to 2,000 because the hardness of the resulting elastomer is suitable. If it is less than 20, it is not preferable in that the elastomer may not be formed. Moreover, when it exceeds 2000, it is not preferable at the point which may produce the difficulty of handling and the difficulty of manufacture.
  • n is preferably 1 to 100 because the hardness of the resulting elastomer is suitable. If it is less than 1, it may be undesirable in that it may not form an elastomer. If it exceeds 100, it may be undesirable in that the elastomer may be too hard.
  • an alkyl chain is preferably used as R, and a propyl group is preferable because of mass productivity.
  • an alkyl chain is preferably used as R ′, and an ethyl group is preferable because of mass productivity.
  • the amino group equivalent of the silicone polymer (A) having an amino group is preferably 500 g / mol to 20000 g / mol because the hardness of the resulting elastomer is suitable.
  • An amino group equivalent of less than 500 is not preferable in that the elastomer may be too hard.
  • an amino group equivalent exceeds 20000, it is unpreferable at the point which does not form an elastomer.
  • Examples of commercially available (A) amino group-containing silicone polymers include KF-8004, KF-8005S, and KF-867S (Shin-Etsu Chemical Co., Ltd.), XF42-B1989 (MOMENTIVE company), ADM1650, and ADM1370 (Asahi Kasei) Wacker Silicone Co., Ltd., SF8452C, SS3551 (Toray Dow Corning Co., Ltd.) and the like.
  • the amino group equivalent represents a value representing the weight of the substance per mole of amino group relative to the substance containing an amino group.
  • the carboxyl group equivalent represented by the following general formula (2) is 1,000 g / mol It is a side chain type carboxyl modified silicone having a weight of 4 to 40,000 g / mol.
  • the acrylic polymer having a carboxyl group (B) used in the present invention is a side-chain carboxyl-modified acrylic polymer having a carboxyl group equivalent represented by the following general formula (3) and having a weight of 200 g / mol to 1000 g / mol.
  • the said carboxyl group equivalent represents the numerical value showing the weight of the substance per 1 carboxyl group with respect to the substance containing a carboxyl group.
  • R 1 and R 2 each represent a methyl group or a group represented by the following [Chemical formula 3], which contains 1 to 100 in one molecule, and y represents an integer of 1 to 50,000. )
  • the acrylic polymer having a carboxyl group represented by the general formula (3) can be synthesized using a known method.
  • a known method As a specific example, 12-methacrylamide dodecanoic acid (MAD) / 2-acrylamido-2-methylpropane sulfonic acid (AMPS) copolymer (90/10), 12-methacrylamide dodecanoic acid (MAD) 18.50 g (65) .37 mmol), 2-acrylamido-2-methylpropane sulfonic acid (AMPS: manufactured by Sigma-Aldrich Japan) 1.50 g (7.24 mmol), sodium hydroxide 0.29 g (7.25 mmol), azobisisobutyric acid 0.30 g (1.83 mmol) of ronitrile (manufactured by Nacalai Tesque) was dissolved in 60.0 g of methanol.
  • AMPS 2-acrylamido-2-methylpropane sulfonic acid
  • Azobisisobutyronitrile was used by recrystallization from methanol according to a conventional method. Degassing was performed by bubbling argon for 60 minutes, the vessel was capped with a septum, and polymerization was carried out by heating at 60 ° C. for 20 hours. After completion of the polymerization reaction, the reaction solution was dropped into a large excess of diethyl ether, and the precipitate was collected by suction filtration. After drying under reduced pressure, 15.2 g of random MAD / AMPS copolymer (90/10) was obtained (yield: 75.1%). The weight average molecular weight was 50000.
  • the carboxyl group equivalent of the component (B) is preferably 200 to 40000 because the hardness of the resulting elastomer is suitable. If it is less than 200, it is not preferable in that the elastomer may be too hard. Moreover, when it exceeds 40000, it is unpreferable in the point which may not form an elastomer.
  • the amount of elastomer coated on talc is 0.5 to 20% by weight, more preferably 1 to 15% by weight, based on talc. It is not preferable that the content exceeds 20% by mass because fusion of talc and reduction of the formability of the powder cosmetic composition may occur. Moreover, it is unpreferable in the point that the improvement effect of a touch may not be acquired as a compounding quantity is less than 0.5 mass%.
  • the elastomer-treated talc according to the present invention can be obtained by mixing talc and (A) a silicone polymer having an amino group, and (B) mixing and heating a silicone polymer having a carboxyl group.
  • the elastomer-treated talc can be obtained by a known method for producing a coated powder.
  • talc and a silicone polymer having an amino group (A) are added to the Henshal mixer and mixed at a low speed for 10 minutes.
  • (B) a silicone polymer having a carboxyl group is added thereto, mixed at a low speed for 10 minutes, and heated, whereby an elastomer-coated inorganic powder according to the present invention can be obtained.
  • the elastomer-coated inorganic powder according to the present invention can be obtained even if the order of addition of the components (A) and (B) is reversed.
  • Metal soap treated talc As the metal soap-treated talc used in the present invention, various metal soap-treated talc can be used. Examples of the metal soap treatment include metal decyltrisiloxane carboxylic acid treatment such as zinc decyltrisiloxane carboxylic acid, calcium stearate treatment, magnesium stearate treatment and the like.
  • decyltrisiloxane carboxylic acid metal-treated talc is obtained by surface-treating a metal salt of a carboxydecyltrisiloxane derivative with talc.
  • a metal salt of the carboxy decyl trisiloxane derivative the terminal carboxyl group of the said derivative and all or one part form a metal salt.
  • divalent or trivalent metal atoms include Zn, Mg, Ca, Ba, Mn, Fe, Co, Al, Ni, Cu, V, Mo, Nb, Ti and the like.
  • Zn or Mg can be suitably used.
  • the carboxydecyl trisiloxane used in the present invention is a kind of carboxylic acid-modified silicone and is represented by the following general formula (4).
  • the amount of metal soap treatment coated on talc is 0.5 to 20% by weight, more preferably 1 to 15% by weight, based on talc. It is not preferable that the content exceeds 20% by mass because fusion of talc and reduction of the formability of the powder cosmetic composition may occur. Moreover, it is unpreferable in the point that the improvement effect of a touch may not be acquired as a compounding quantity is less than 0.5 mass%.
  • the zinc salt of decyltrisiloxanecarboxylate can be obtained by a known method for producing a coated powder. As a specific example, it is carried out by the following two types of dry method and wet method. However, it is not limited to these.
  • the organosiloxane derivative of the above chemical formula 5 is converted to a sodium salt in a 1% aqueous sodium hydroxide solution, and then salt exchange is carried out by the addition of a 1% aqueous zinc chloride solution, and the Zn salt of the organosiloxane derivative is obtained.
  • Salt exchange is carried out by the addition of a 1% aqueous zinc chloride solution, and the Zn salt of the organosiloxane derivative is obtained.
  • 15 g of talc and 5 g of the Zn salt of the organosiloxane derivative are ground and mixed.
  • a surface treatment by a wet method is more preferably employed.
  • the mixing temperature is preferably 60 to 80.degree.
  • the mixing time varies depending on the amount of treatment and the type of powder, but usually 1 to Preferably 3 hours
  • the elastomer treatment and the metal soap treatment may be powders other than talc.
  • inorganic powders boron nitride, sericite, natural mica, calcined mica, synthetic mica, synthetic cericite, alumina, mica, kaolin, bentonite, smectite, calcium carbonate, magnesium carbonate, calcium phosphate, anhydrous silicic acid, magnesium oxide , Tin oxide, iron oxide, yttrium oxide, chromium oxide, titanium oxide, zinc oxide, cerium oxide, aluminum oxide, magnesium oxide, chromium hydroxide, bitumen, ultramarine, calcium phosphate, aluminum hydroxide, barium sulfate, magnesium sulfate, silicate , Aluminum magnesium silicate, calcium silicate, barium silicate, magnesium silicate, aluminum silicate, strontium silicate, silicon carbide, magnesium fluoride, metal tungstate, magnesium aluminate Magnesium aluminometasilicate
  • polyester powder As organic powder, polyester powder, polyethylene powder, polypropylene powder, polymethyl methacrylate powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethyl methacrylate powder, polymethylbenzoguanamine powder, polytetrafluoroethylene powder, cellulose, silk powder , Nylon powder, 12 nylon powder, 6 nylon powder, styrene / acrylic acid copolymer powder, divinylbenzene / styrene copolymer powder, vinyl resin powder, urea resin powder, phenol resin powder, fluorocarbon resin powder, acrylic resin powder, Examples thereof include melamine resin powder, epoxy resin powder, polycarbonate resin powder, microcrystalline fiber powder, starch powder, lauroyl lysine powder and the like.
  • surfactant metal salt powder examples include zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetyl phosphate, calcium cetyl phosphate, zinc sodium cetyl phosphate and the like.
  • solid powder cosmetic composition according to the present invention, other components such as an ester, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, as long as the effects of the present invention are not impaired.
  • Moisturizer, water soluble polymer, thickener, film agent, UV absorber, sequestering agent, lower alcohol, polyhydric alcohol, sugar, amino acid, organic amine, polymer emulsion, pH adjuster, skin nutrition agent, Vitamins, antioxidants, antioxidant aids, perfumes, water and the like can be appropriately blended, if necessary, and can be produced by an ordinary method according to the intended dosage form.
  • Specific components which can be blended are listed below, but the above-mentioned essential blending components and any one or more of the following components can be blended to prepare a solid powder cosmetic.
  • fatty acid soap eg, sodium laurate, sodium palmitate etc.
  • higher alkyl sulfate ester salt eg, sodium lauryl sulfate, potassium lauryl sulfate etc.
  • alkyl ether sulfate ester salt eg, POE-lauryl sulfate triethanolamine, POE-sodium lauryl sulfate, etc.
  • N-acyl sarcosic acid eg, lauroyl sarcosine sodium etc.
  • higher fatty acid amide sulfonate eg, N-myristoyl-N-methyl taurine sodium, coconut Oil fatty acid methyl taurid sodium, lauryl methyl taurid sodium etc .
  • phosphate ester salt POE-oleyl ether sodium phosphate, POE-stearyl ether phosphoric acid etc
  • sulfosuccinate sodium di-2-ethylhex
  • alkyl trimethyl ammonium salt for example, stearyl trimethyl ammonium chloride, lauryl trimethyl ammonium chloride and the like
  • alkyl pyridinium salt for example, cetyl pyridinium chloride and the like
  • distearyl dimethyl ammonium dialkyl dimethyl ammonium salt Poly (N, N'-dimethyl-3,5-methylene piperidinium chloride); alkyl quaternary ammonium salt; alkyl dimethyl benzyl ammonium salt; alkyl isoquinolinium salt; dialkyl morophonium salt; POE-alkyl amine; Alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride and the like.
  • amphoteric surfactants examples include imidazoline amphoteric surfactants (eg, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide). Side-1-carboxyethyloxy disodium salt and the like); betaine surfactants (eg, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetic acid betaine, alkyl betaine, amido betaine) And sulfobetaine etc.).
  • imidazoline amphoteric surfactants eg, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide.
  • Side-1-carboxyethyloxy disodium salt and the like
  • lipophilic nonionic surfactants include sorbitan fatty acid esters (eg, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexyl acid, diglycerol sorbitan tetra-2-ethylhexyl acid, etc.
  • sorbitan fatty acid esters eg, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexyl acid, diglycerol sorbitan tetra-2-eth
  • Glycerin polyglycerin fatty acids eg mono cotton seed oil fatty acid glycerin, monoerlucate glycerin, sesquioleic acid glycerin, monostearin Acid glycerin, ⁇ , ⁇ '-oleic acid pyroglutamic acid glycerin, monostearic acid glycerin malic acid, etc .
  • propylene glycol fatty acid esters eg, Examples thereof include propylene glycol monostearate and the like; hardened castor oil derivatives; glycerin alkyl ether and the like.
  • hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (for example, POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.) POE-Sorbit fatty acid esters (eg, POE-Sorbit monolaurate, POE-Sorbit monooleate, POE-Sorbit pentaoleate, POE-Sorbit monostearate etc.); POE-glycerin fatty acid esters (eg, POE) -Glycerin monostearate, POE-glycerin monoisostearate, POE-POE-monooleate such as POE-glycerin triisostearate, etc.); POE-fatty acid esters (eg POE-distearate) POE-monodioleate, ethylene glycol distearate, etc .; POE
  • a moisturizing agent for example, polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucotin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate And sodium lactate, bile salts, dl-pyrrolidone carboxylates, alkylene oxide derivatives, short chain soluble collagen, diglycerin (EO) PO adducts, extract of Izayoira, extract of Yarrow extract, extract of Meriloto, and the like.
  • EO diglycerin
  • Naturally occurring water-soluble polymers include plant-based polymers (eg, gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agarten, quince seed (marmelo), alge colloid (kasou extract), starch (Rice, corn, potato, wheat), glycyrrhizinic acid; microbial polymers (for example, xanthan gum, dextran, succinoglucan, bullan etc.); animal polymers (for example, collagen, casein, albumin, gelatin etc) Can be mentioned.
  • plant-based polymers eg, gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agarten, quince seed (marmelo), alge colloid (kasou extract), starch (Rice, corn, potato, wheat), glycyrrhizinic acid
  • semi-synthetic water-soluble polymers include starch-based polymers (for example, carboxymethyl starch, methyl hydroxypropyl starch and the like); cellulose-based polymers (methyl cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, cellulose sodium sulfate) And hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc .; alginic acid based polymers (eg, sodium alginate, alginic acid propylene glycol ester etc.) and the like.
  • starch-based polymers for example, carboxymethyl starch, methyl hydroxypropyl starch and the like
  • cellulose-based polymers methyl cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, cellulose sodium sulfate
  • alginic acid based polymers eg, sodium al
  • Examples of synthetic water-soluble polymers include vinyl polymers (eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer, etc.); polyoxyethylene polymers (eg, polyethylene glycol 20,000, 40) And polyoxyethylene polyoxypropylene copolymers etc .; acrylic polymers (for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide etc.); polyethyleneimines; cationic polymers etc.
  • vinyl polymers eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer, etc.
  • polyoxyethylene polymers eg, polyethylene glycol 20,000, 40
  • acrylic polymers for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide etc.
  • polyethyleneimines for example, sodium polyacrylate, polyethyl
  • a thickener for example, gum arabic, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed (mallo), casein, dextrin, gelatin, sodium pectate, sodium aluminate, methyl cellulose, ethyl cellulose, CMC, hydroxyethyl cellulose, hydroxypropyl Cellulose, PVA, PVM, PVP, sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarint gum, dialkyldimethyl ammonium cellulose, xanthan gum, magnesium aluminum silicate, bentonite, hectorite, A1 Mg silicate (bee gum), Laponite, silicic acid anhydride and the like can be mentioned.
  • a thickener for example, gum arabic, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed (mallo), casein, dextrin,
  • UV absorbers examples include benzoic acid UV absorbers (for example, paraaminobenzoic acid (hereinafter referred to as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); anthranilic acid ultraviolet light absorbers (eg, homomentyl-N-acetyl anthranilate etc.); Salicylic acid UV absorbers (eg, amyl salicylate, menthyl salicylate, homomentyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.); cinnamic acid UV absorber
  • the sequestering agent for example, 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, edetate disodium, edetate trisodium, edetate tetrasodium Sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium ethylenediaminehydroxyethyl triacetate and the like.
  • the lower alcohol includes, for example, ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol and the like.
  • polyhydric alcohols for example, dihydric alcohols (eg ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol etc .; trihydric alcohols (eg glycerin, trimethylolpropane etc.); tetrahydric alcohols (eg 1,2,6) -Pentaerythritol such as hexanetriol etc.); pentahydric alcohol (eg, xylitol etc.); hexahydric alcohol (eg, sorbitol, mannitol etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, toto) Lily glycol, polypropylene glycol, tetraethylene
  • monosaccharides include tricarbon sugars (eg, D-glyceryl aldehyde, dihydroxyacetone etc.); tetracarbon sugars (eg, D-erythrose, D-erythrulose, D-Treose, erythritol etc.); , L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc .; 6-carbon sugar (eg, D-glucose, D-talose, D -Bushicose, D-galactose, D-fructose, L-galactose, L-mannose, D-tagatose etc .; heptacarbon sugar (eg aldoheptose, heprose etc); octacarbon sugar (eg octulose etc); deoxy sugar For
  • oligosaccharides include sucrose, gunthianose, umbelliferous, lactose, planteos, isolycinos, ⁇ , ⁇ -trehalose, raffinose, lycnose, umbilicin, stachyose vervascose and the like.
  • polysaccharides include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucotin sulfate, guar gum, dextran, kerato sulfate Locust bean gum, succinoglucan, caronic acid and the like.
  • amino acids examples include neutral amino acids (for example, threonine, cysteine and the like); basic amino acids (for example, hydroxylysine and the like) and the like.
  • amino acid derivative examples include acylsarcosine sodium (lauroyl sarcosine sodium), acyl glutamate, acyl ⁇ -alanine sodium, glutathione, pyrrolidone carboxylic acid and the like.
  • organic amines examples include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol and the like.
  • polymer emulsion examples include acrylic resin emulsions, ethyl polyacrylate emulsions, acrylic resin solutions, polyacrylic alkyl ester emulsions, polyvinyl acetate resin emulsions, natural rubber latex and the like.
  • pH adjusters examples include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.
  • vitamins examples include vitamin A, B1, B2, B6, C, E and derivatives thereof, pantothenic acid and derivatives thereof, biotin and the like.
  • antioxidant examples include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters and the like.
  • antioxidant aid examples include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid and the like.
  • preservatives ethylparaben, butylparaben, chlorphenesin, phenoxyethanol, etc.
  • anti-inflammatory agents eg, glycyrrhizinic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin etc.
  • Whitening agents eg, placenta extract, yukinoshita extract, arbutin etc.
  • various extracts eg., Oubac, ouren, sikon, peony, semen, birch, sage, loquat, carrot, aloe, zenia oyster, iris, grape
  • Yokuinin, pomace lily, saffron, sage, sage, oatsliosis, onynis, onynis, garlic, pepper, chipping, seaweed, etc.
  • activator eg, royal jelly, photosensitizer, cholesterol derivative, etc.
  • metal sequestering agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, malic acid, caffeine, tannin, verapamil, tranexamic acid and its derivatives, licorice, Various herbal extracts such as cullin, Itabi, etc., drugs such as tocopherol acetate, glycyrrhizinic acid, glycyrrhizinic acid and its derivatives or salts thereof, vitamin C, magnesium ascorbate phosphate, ascorbic acid glucoside, albicans, kojic acid and other skin lightening agents Amino acids such as arginine and lysine and derivatives thereof, saccharides such as fructose, mannose, erythritol, trehalose, xylitol and the like can be appropriately blended.
  • the product form of the solid powder cosmetic according to the present invention can be any product form in the category of powder cosmetic. Specifically, a product form such as foundation, eye shadow, teak color, body powder, perfume powder, baby powder, pressed powder, deodorant powder, or powder can be taken.
  • Evaluation (1) Method of measuring average crystallite diameter A sample was measured with an X-ray diffractometer (Geigerflex, manufactured by Rigaku Denki Co., Ltd.), and the average crystallite diameter was calculated by applying a Scherrer formula.
  • Evaluation (2) Evaluation of hiding power
  • the titanium dioxide powder is dispersed and mixed in a nitrocellulose lacquer to a concentration of 5%, and the obtained dispersion is 0.101 ⁇ m on a black-and-white hiding ratio test paper JIS-K5400
  • the test sample was obtained by coating and drying with a film thickness of
  • the test samples obtained were subjected to colorimetry on the surface of the coating on white and black paper with a spectrophotometer (CM-2600, manufactured by Konica Minolta).
  • CM-2600 spectrophotometer
  • the color difference ( ⁇ E) in the Hunter Lab color space was calculated and evaluated as the hiding power.
  • ⁇ E (Evaluation criteria) ⁇ : 25 ⁇ E ⁇ : 22 ⁇ E ⁇ 25 ⁇ : ⁇ E ⁇ 22
  • Evaluation (3) Evaluation of Red Permeability With red permeability, among the spectral reflectances at each wavelength obtained by measurement on black paper as in the above-mentioned hiding power, the reflectance at the wavelength of 450 nm and the wavelength are The reflectance ratio at 650 nm (reflectance at a wavelength of 450 nm / reflectance at 650 nm: R450 / R650) was calculated. Higher R450 / R650 indicates higher red transmission and lower R450 / R650 indicates lower red transmission.
  • Evaluation (5) Measuring Method of Apparent Average Particle Size By the method shown in FIG. 1, the average value of the lengths of the major and minor axes of the particles is taken.
  • Both rutile-type pigment-grade titanium oxide and anatase-type pigment-grade titanium oxide had low red transmittance. Moreover, even if these were baked at high temperature, red permeability was low.
  • the present inventors examined whether it is possible to produce a highly excellent hiding power using rutile-type titanium oxide having high red color permeability.
  • the present inventors have prepared two types of titanium dioxide having different particle diameters, each having needle-like projections on the surface of the particles in which needle-like particles are radially oriented and aggregated, using the method of Patent Document (Japanese Patent Laid-Open No. 2010-173863). did.
  • Titanium oxide A (specific surface area: 101 m 2 / g, crystallite diameter: 5 nm, apparent average particle diameter: 0.2 to 0.3 ⁇ m, needle shape), titanium oxide B (specific surface area) 117 m 2 / g, crystallite diameter: 11 nm, apparent average particle diameter: 0.3 ⁇ m, needle-like protrusion shape).
  • titanium dioxide C (specific surface area: 98 m 2 / g, crystal) having needle-like projections on the particle surface in which needle-like particles which are commercially available products (ST-730; made by titanium industry) are oriented and aggregated radially
  • the particle diameter is 6 nm
  • the apparent average particle diameter is 0.5 ⁇ m, and it is referred to as a needle-like protrusion).
  • titanium dioxide D (84 m 2 / g, crystallite diameter: a titanium dioxide having needle-like projections on the particle surface in which needle-like particles which are commercially available products (ST-750: manufactured by Titanium Kogyo Co., Ltd.) are oriented and aggregated radially.
  • titanium oxide which is a commercially available product (MT062; manufactured by Tayca Industries, Ltd.) in the form of needles is titanium oxide E (specific surface area: 47 m 2 / g, crystallite diameter: 23.3 nm, apparent average particle diameter) : 65 nm, needle-like protrusion shape) is called.
  • Titanium dioxide powder was obtained using each titanium dioxide by the following method.
  • the obtained titanium dioxide powder was evaluated by the above evaluation method, and the relationship between the type of titanium dioxide before firing and the firing temperature was examined. The results are shown in Tables 2 to 6.
  • a titanium dioxide powder was obtained by placing 100 g of titanium dioxide to be used as a mother nucleus in a quartz crucible and firing in a muffle furnace at each temperature for 1 hour.
  • Titanium oxide A (specific surface area: 101 m 2 / g, crystallite diameter: 5 nm, apparent average particle diameter: 0.2 to 0.3 ⁇ m, needle-like protrusion shape)
  • Titanium oxide B (Specific surface area: 117 m 2 / g, Crystallite diameter: 11 nm, Apparent average particle diameter: 0.3 ⁇ m, Needle-like protrusion shape)
  • Titanium oxide C (specific surface area: 98 m 2 / g, crystallite diameter: 6 nm, apparent average particle diameter: 0.5 ⁇ m, needle-like protrusion shape)
  • Titanium oxide D (specific surface area: 84 m 2 / g, crystallite diameter: 8.6 nm, apparent average particle diameter: 1 ⁇ m, needle-like protrusion shape)
  • Titanium oxide E (specific surface area: 47 m 2 / g, crystallite diameter: 23.3 nm, apparent average particle diameter: 65 nm, needle-like protrusion shape)
  • the hiding power was improved by raising the firing temperature. Since the specific surface area decreases as the temperature rises, the voids formed in the particles are reduced by the condensation of the radially oriented aggregated needle-like particles present before firing. Recognize. This causes an apparent refractive index improvement, and the hiding power is improved.
  • the red permeability gradually decreased. In particular, sintering at a high temperature caused excessive sintering, and the initial red color permeability was significantly reduced. In particular, with respect to titanium oxide C having a large average particle size, the red transmittance was substantially lost at 700 ° C.
  • titanium oxide D in which needle-like particles are oriented and aggregated in the same manner as titanium oxides A to C has an apparent particle diameter although the specific surface area decreases in the same manner as titanium oxides A to C with an increase in firing temperature.
  • the improvement of the hiding power was extremely small because Furthermore, the red particle transmission also remained low regardless of before and after firing because the apparent particle size was extremely large, and the desired red particle transmission was not obtained.
  • titanium oxide E having a small average particle size before firing and consisting of single needle-like particles the shape does not significantly change even after firing and the red transmittance is maintained, but the hiding power is not improved at all.
  • titanium dioxide which is a commercial product (TTO 55 (A); manufactured by Ishihara Sangyo Co., Ltd.) and whose particles are granular, titanium oxide F (specific surface area: 37 m 2 / g, crystallite diameter: 24.8 nm, apparent average) Particle size: 50 nm, granular).
  • titanium dioxide G specific surface area: 132 m 2 / g, crystallite diameter: 8.6 nm, apparent
  • ST 643 manufactured by Titanium Kogyo Co., Ltd.
  • Titanium oxide F (specific surface area: 37 m 2 / g, crystallite diameter: 24.8 nm, apparent average particle diameter: 50 nm, granular)
  • titanium oxide G (specific surface area: 132 m 2 / g, crystallite diameter: 8.6 nm, apparent average particle diameter: 200 nm, in the form of wrinkles).
  • the titanium oxide used in Test Example 7-1 is (a) an apparent average particle diameter, (b) an average crystallite measured by X-ray diffraction method, similarly to titanium dioxide used for the mother nucleus of the present invention.
  • the diameter (c) satisfies the specific surface area but does not have needle-like projections on the surface of the particles. Furthermore, since the ratio of the minor axis to the major axis is as large as 2.5, sufficient red color permeability and hiding power can not be realized even after firing.
  • titanium oxide B that has a wide acceptable temperature range from the viewpoint of improving the hiding power and maintaining the red transmittance as the titanium oxide of the mother nucleus used in the present invention.
  • the measurement results of the spectral reflectances of rutile type pigment grade titanium oxide (* 1) and titanium oxide B (unbaked, firing temperature: 700 ° C., 900 ° C.) are shown in FIG.
  • the measurement was carried out by dispersing and mixing titanium dioxide powder in a nitrocellulose lacquer so as to have a concentration of 5%, and applying the obtained dispersion on a black-and-white hiding factor test paper JIS-K5400 with a film thickness of 0.101 ⁇ m. -Dried to obtain a test sample.
  • the test sample thus obtained was subjected to colorimetry on the surface of the coated film on black paper with a spectrocolorimeter (CM-2600, manufactured by Konica Minolta Co., Ltd.) to obtain a spectral reflectance.
  • CM-2600 manufactured by Konica Minolta Co., Ltd.
  • an appropriate temperature range is preferably 500 to 800 ° C., particularly 500 to 700 ° C.
  • the inventors examined the firing temperature in the range of 500 ° C. to 800 ° C. finely using titanium oxide B as a mother nucleus. That is, the inventor evaluated the titanium dioxide powder in which the firing temperature was changed by the above evaluation method. The results are shown in Tables 5 and 6.
  • the firing was performed in a rotary firing furnace (rotary kiln) that is closer to mass production and has a high firing efficiency.
  • rotary firing furnace rotary kiln
  • the rotary firing furnace has a high firing efficiency and can obtain the same fired state at a lower temperature than when fired in a muffle furnace which is fired by standing.
  • the specific surface area is an index indicating the decrease in porosity of the obtained titanium oxide particles and the progress of sintering
  • the titanium dioxide used in the present invention has a specific surface area by firing titanium dioxide powder which is a mother core.
  • the preferred range is 8 to 30% of that before firing (100%).
  • the baking temperature is preferably 550 to 700 ° C., and more preferably 575 to 660 ° C. that the shielding power and the red color permeability are excellent.
  • Solid powder cosmetic Furthermore, the present inventors used solid titanium dioxide obtained by the method of surface treatment described below using titanium dioxide obtained at a firing temperature of 660 ° C. in Table 6 as a solid powder cosmetic, respectively. Adjusted by law. And the obtained cosmetics were evaluated by the following evaluation method.
  • Evaluation (6) Natural Finish 10 experts applied the sample to the face and evaluated the feeling of use after application. A: Seven or more out of 10 panelists answered that the finish is natural. B: 5 or more and less than 7 out of 10 panelists answered that the finish is natural. C: Less than 5 out of 10 panelists answered that the finish is natural.
  • Evaluation (7) Good Elongation Ten professional panels applied the sample to the face and evaluated the feeling of use after application. A: Seven or more out of ten panelists answered that there is good growth. B: 5 or more and less than 7 out of 10 panelists answered that there is good growth. C: Less than 5 out of 10 panelists answered that there is good growth.
  • Evaluation (8) No Happiness Ten professional panels applied the sample to the face and evaluated the feeling of use after application. A: Seven or more out of ten panelists answered that no whitening was observed. B: 5 or more out of 10 panelists answered that there was no whitening. C: Less than 5 out of 10 panelists answered that the pores were not whitened.
  • OTS-2 STN-1 (* 10) Daito Kasei Kogyo Co., Ltd.
  • OTS-2 BL-100 (* 11) To-Color Pigment Co., Ltd. D-400 (* 12) Shin-Etsu Chemical Co., Ltd. KSP-100
  • the solid powder cosmetic using the titanium dioxide of the present invention and the surface-treated talc of the present invention can be highly blended with spherical powder and is excellent in usability and impact stability. While it was found to have a natural finish and no whitening when applied to the skin.
  • Test Example 7-3 when titanium dioxide used as a mother nucleus is used as it is, it is inferior in coverage of stains and freckles and noticeable in texture.
  • the use of a powder which has not been subjected to the metal soap surface treatment represented by the present invention is inferior to Test Examples 7-4 to 7-5 in the point of impact stability.

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CN110769802B (zh) 2023-11-07

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