JP2018087146A - Composition for powder cosmetic containing spherical particles of differing particle size - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powdery cosmetic composition for a keratin substance such as skin, which has improved properties covering defects of skin. According to the present invention, (a) at least one first spherical silicone powder having an average primary particle size of 7 μm or more, preferably 10 μm or more, and (b) an average primary particle size of 3 μm or less, preferably 1 μm. The present invention relates to a powdery cosmetic composition for a keratin substance such as skin, which comprises at least one second spherical silicone powder described below. [Selection diagram] None

Description

  The present invention relates to a powdery cosmetic composition for keratin materials such as skin, and more particularly to a powdery cosmetic composition comprising at least two types of silicone powders having different particle sizes.

  Powdery cosmetic compositions for keratin materials such as foundations are generally applied to keratin materials such as skin to hide defects such as stains, wrinkles and pores. Therefore, the characteristic for covering the skin defects is one of the important functions of the powdery cosmetic composition. In order to improve the performance of covering skin defects, generally spherical organic powders are used in powdered cosmetic compositions.

  To date, several prior art documents relating to powder cosmetics containing spherical organic powder have been published.

  JP-A-2000-038317 discloses a makeup cosmetic containing (A) a composite powder composed of different types of organopolysiloxane, (B) a powder containing a colored powder, and (C) an oil. .

  JP-A-2008-208158 is a method for producing spherical polyorganosilsesquioxane fine particles, wherein (A) a step of hydrolyzing and partially condensing an organotrialkoxysilane in an acid aqueous solution, and (B) a product Allowing to stand and separate the upper layer liquid and the lower layer composed of the partial condensation product, separating the lower layer partial condensation product and mixing with alcohol; and (C) the alcohol mixture of the partial condensation product. Discloses a method comprising a step of mixing a solution with an alkaline aqueous solution to complete the condensation reaction.

  JP-A-2012-250914 discloses a cosmetic comprising (A) spherical particles having a particle diameter of 25 to 35 μm and (B) glittering powder.

  JP-A-2007-269729 includes (a) a powder having a refractive index of more than 1.5 and less than 2.0, (b) a colored pigment and / or a glittering powder, and (c) an oil agent having a refractive index of more than 1.47 at 20 ° C. A makeup cosmetic product containing 50% to 100% by mass of the component (a) in the total powder is disclosed.

  However, there is still a need for powdery cosmetics with improved performance to cover skin imperfections.

JP-A-2000-038317 JP-A-2008-208158 JP-A-2012-250914 JP-A-2007-269729 Patent application EP-A-295 886 Patent US 5 538 793

  The object of the present invention is to provide a powdery cosmetic composition for keratin materials such as skin, with improved properties covering the skin defects.

The above object of the present invention is to
(a) at least one first spherical silicone powder having an average primary particle size of 7 μm or more, preferably 10 μm or more, and
(b) It can be realized by a powdery cosmetic composition comprising at least one second spherical silicone powder having an average primary particle size of 3 μm or less, preferably 1 μm or less.

  The first spherical silicone powder and the second spherical silicone powder can be independently selected from a polyorganosilsesquioxane powder and an organopolysiloxane elastomer powder coated with a silicone resin.

  The first spherical silicone powder and the second spherical silicone powder can be independently selected from (vinyl dimethicone / methicone silsesquioxane) crosspolymer and polymethylsilsesquioxane powder.

  The total amount of the first spherical silicone powder and the second spherical silicone powder is 0.2% by mass to 20% by mass, preferably 1% by mass to 15% by mass, and more preferably 2% by mass with respect to the total mass of the composition. To 10 mass%.

  Preferably, the composition according to the invention further comprises at least one lipophilic liquid substance having a refractive index of 1.48 or more, preferably 1.50 or more, even more preferably 1.53 or more.

  The lipophilic liquid material can be selected from aromatic silicone oils, non-volatile hydrocarbon oils containing at least one phenyl group, organic UV screening agents, and mixtures thereof.

  The aromatic silicone oil can be selected from aromatic silicone oils having at least one Si atom substituted with at least one phenyl group at the end of the main chain.

  The organic UV screening agent can be selected from ethylhexyl methoxycinnamate and octocrylene.

The non-volatile hydrocarbon oil containing at least one phenyl group can be a C ₁₂ -C ₁₅ alkyl benzoate.

  The lipophilic liquid substance is 0.1% to 20% by weight, preferably 1% to 15% by weight, more preferably 3% to 12% by weight, in particular 5% to 10% by weight relative to the total weight of the composition. It can be present in a content in the range of mass%.

  Preferably, the composition according to the invention further comprises at least one inorganic filler, which is selected from talc, mica, synthetic mica and silica, and is preferably surface treated hydrophobic.

  Preferably, the composition according to the invention further comprises at least one organic filler.

  The composition according to the invention may be anhydrous or may contain less than 3% by weight of water, preferably less than 1% by weight, based on the total weight of the composition.

  The invention also relates to a method for preparing a composition according to the invention by mixing a first spherical silicone powder and a second spherical silicone powder.

  The present invention also relates to a cosmetic method for keratin materials such as skin, which comprises the step of applying a composition according to the present invention to a keratin material.

  As a result of intensive studies, the present inventors have surprisingly found that when at least two kinds of spherical silicone powders having different particle diameters of 7 μm or more and 3 μm or less are used, the powdery cosmetics have excellent properties covering skin defects. The present invention was completed in this way.

Therefore, the keratin substance according to the present invention, preferably a powdery cosmetic composition for skin,
(a) at least one first spherical silicone powder having an average primary particle size of 7 μm or more, preferably 10 μm or more, and
(b) includes at least one second spherical silicone powder having an average primary particle size of 3 μm or less, preferably 1 μm or less.

  The composition according to the invention has improved properties covering skin defects such as spots, wrinkles and pores. In particular, the composition according to the present invention has an enhanced effect of hiding pores. According to the improved effect of covering the shortcomings of the skin of the present invention, the consumer does not need to apply large amounts of the composition to keratin materials such as facial skin. Thus, the composition according to the invention can also create a more natural and semi-matte appearance due to the reduced amount of composition applied.

  Hereinafter, the composition according to the present invention will be described in detail.

[Composition]
The powdery cosmetic composition according to the present invention comprises at least two spherical silicone powders having different particle sizes.

(Spherical silicone powder)
In particular, the powdery cosmetic composition according to the present invention comprises (a) at least one first spherical silicone powder having an average primary particle size of 7 μm or more, preferably 10 μm or more, and (b) an average primary particle size of 3 μm. In the following, at least one second spherical silicone powder preferably containing 1 μm or less is included.

  In addition to (a) the first spherical silicone powder and (b) the second spherical silicone powder, one or more additional spherical silicone powders having different average primary particle sizes are used in the composition. Can do. For example, using three, four, or five spherical silicone powders having different average primary particle sizes, including (a) a first spherical silicone powder and (b) a second spherical silicone powder. it can. Preferably, the composition according to the invention comprises (a) a first spherical silicone powder and (b) two spherical silicone powders having an average primary particle size different from that of the second spherical silicone powder.

  The term “spherical” as used herein means not only a true spherical shape but also a substantially spherical shape, and even an elliptical spherical shape. In the present invention, the term “spherical powder” can represent a powder having an aspect ratio of 2 or less. Preferably, the spherical powder of the present invention has an aspect ratio of 1.5 or less. The aspect ratio can be measured by common techniques in the art, for example, image analysis using an electron microscope.

  (a) The first spherical silicone powder has an average primary particle size of 7 μm or more, preferably 10 μm or more. The upper limit of the average primary particle size of the first spherical silicone powder is not limited, but is generally less than 200 μm, preferably less than 100 μm, more preferably less than 50 μm.

  (b) The second spherical silicone powder has an average primary particle size of 3 μm or less, preferably 1 μm or less. The lower limit of the average primary particle size of the second spherical silicone powder is not limited, but is generally at least 0.05 μm (50 nm), preferably at least 0.1 μm (100 nm), more preferably at least 0.2 μm (200 nm). is there.

  The term “average primary particle size” as used herein refers to the number average particle size given by the statistical particle size distribution for half of the population and is referred to as D50. For example, the number average particle size can be measured with a laser diffraction particle size distribution analyzer, such as Mastersizer 2000 by Malvern Corp.

  (a) The first spherical silicone powder and (b) the second spherical silicone powder may have the same chemical structure or different chemical structures.

  The spherical silicone powder is advantageously selected from polyorganosilsesquioxane powder, preferably polymethylsilsesquioxane powder, organopolysiloxane elastomer powder coated with silicone resin, and powder of organosilicone particles.

Polyorganosilsesquioxane powder is a kind of silicone material formed of branched, cage-like oligosiloxanes of general formula R _n SiX _m O _y , where R is a non-reactive substituent, Usually, it is Me or Ph, and X is a functional group (H, OH, Cl or OR). These groups can be further condensed to obtain highly crosslinked insoluble polysiloxane networks.

  Commercially available polymethylsilsesquioxane powder is widely used in cosmetic applications to provide water repellency, lubricity, and impart a smooth and silky feel and / or appearance to the skin. Materials sold under the trademark “TOSPEARL” by Momentive Performance Materials, and materials sold under the names MSP-N050 and MSP-N080 by Nikko Rica Co., Ltd. are polymethylsilsesquioxane silicone resins. , Also known as T-resin or methylsilsesquioxane.

  The organopolysiloxane elastomer powder may be, for example, crosslinked, a diorganopolysiloxane containing at least one hydrogen bonded to silicon and a diorganopolysiloxane containing ethylenically unsaturated groups bonded to silicon. For example, a cross-linking addition reaction in the presence of a platinum catalyst, or a diorganopolysiloxane containing hydroxyl end groups and a diorganopolysiloxane containing at least one hydrogen bonded to silicon, for example, in the presence of organotin. Or a diorganopolysiloxane containing a hydroxyl end group and a hydrolyzable organopolysilane, or an organopolysiloxane, for example, in the presence of an organic peroxide catalyst. Or by cross-linking organopolysiloxane with gamma rays, It can be obtained by crosslinking by high energy radiation, such as external or electron beam.

  In one embodiment, the organopolysiloxane elastomer powder is crosslinked, which includes (A2) a diorganopolysiloxane containing at least two hydrogens each bonded to silicon and (B2) at least two ethylene bonded to silicon. For example, as described in Patent Application EP-A-295 886, it can be obtained by, for example, (C2) crosslinking addition reaction in the presence of a platinum catalyst.

  For example, the organopolysiloxane elastomer powder can be obtained by reacting dimethylpolysiloxane containing dimethylvinylsiloxy end groups with methylhydrogen polysiloxane containing trimethylsiloxy end groups in the presence of a platinum catalyst.

Compound (A2) is a base reagent for the formation of silicone powder, and crosslinking is carried out by subjecting compound (A2) and compound (B2) to an addition reaction in the presence of a catalyst (C2). Compound (A2) can be, for example, a diorganopolysiloxane containing at least two lower alkenyl groups (for example, C _{2 to} C ₄ ), and the lower alkenyl group is selected from a vinyl group, an allyl group, and a propenyl group. Can do. These lower alkenyl groups can be placed at any position on the organopolysiloxane molecule, but in one embodiment are placed at the ends of the organopolysiloxane molecule. The organopolysiloxane (A2) may have a branched, linear, cyclic or network structure, and in one embodiment, a linear structure may be used. In general, compound (A2) may have a viscosity ranging from the liquid state to the gum state. For example, compound (A2) may have a viscosity of at least 100 centistokes at 25 ° C.

  Organopolysiloxane (A2) is methylvinylsiloxane, methylvinylsiloxane-dimethylsiloxane copolymer, dimethylpolysiloxane containing dimethylvinylsiloxy end groups, dimethylsiloxane-methylphenylsiloxane copolymer containing dimethylvinylsiloxy end groups, dimethylvinylsiloxy end Dimethylsiloxane-diphenylsiloxane-methylvinylsiloxane copolymer containing dimethylsiloxane, dimethylsiloxane-methylvinylsiloxane copolymer containing trimethylsiloxy end groups, dimethylsiloxane-methylphenylsiloxane-methylvinylsiloxane copolymer containing trimethylsiloxy end groups, dimethylvinylsiloxy Methyl (3,3,3-trifluoropropyl) polysiloxane containing end groups and dimethylvinylsiloxy end groups It can be selected from methyl (3,3,3-trifluoropropyl) siloxane copolymers - No dimethylsiloxane.

  Compound (B2) can be, for example, an organopolysiloxane containing at least two hydrogens bonded to silicon in each molecule, and thus becomes a cross-linking agent for compound (A2). In one embodiment, the sum of the number of ethylenic groups per molecule of compound (A2) and the number of hydrogen atoms bonded to silicon per molecule of compound (B2) is at least 4.

  The compound (B2) may have any molecular structure. In one embodiment, compound (B2) has a linear or branched structure or a cyclic structure. Compound (B2) can be selected from methylhydrogenpolysiloxanes containing trimethylsiloxy end groups, dimethylsiloxane-methylhydrogensiloxane copolymers containing trimethylsiloxy end groups, and cyclic dimethylsiloxane-methylhydrogensiloxane copolymers. The compound (B2) has a viscosity in the range of 1 to 50,000 centistokes at 25 ° C., for example, so that the miscibility with the compound (A) can be improved. In one embodiment, the compound (B2) has a molecular ratio of 1 between the total amount of hydrogen atoms bonded to silicon in the compound (B2) and the total amount of all ethylenically unsaturated groups in the compound (A2). Can be added in an amount such that it is within the range of 1: 1 to 20: 1.

  Compound (C2) is a crosslinking reaction catalyst, for example, from chloroplatinic acid, chloroplatinic acid-olefin complex, chloroplatinic acid-alkenylsiloxane complex, chloroplatinic acid-diketone complex, platinum black, and platinum on a support. You can choose. The catalyst (C2) may be added, for example, as clean platinum metal in an amount in the range of 0.1 to 1000 parts by weight, for example, 1 to 100 parts by weight per 1000 parts by weight of the total amount of the compounds (A2) and (B2). it can.

  Other organic groups may be bonded to silicon in the aforementioned organopolysiloxanes (A2) and (B2), for example, alkyl groups such as methyl, ethyl, propyl, butyl or octyl; 2-phenylethyl, Substituted alkyl groups such as 2-phenylpropyl or 3,3,3-tri-fluoropropyl; aryl groups such as phenyl, tolyl or xylyl; substituted aryl groups such as phenylethyl; and epoxy groups, carboxylate groups or mercapto groups A monovalent hydrocarbon group which is substituted.

  Organopolysiloxane elastomer powders coated with silicone resins that can be used in the present compositions include organopolysiloxane elastomer powders coated with silicone resins, particularly silsesquioxane resins, which For example, it is described in patent US 5 538 793, the contents of which are incorporated herein by reference. Such elastomer powders are sold by Shin-Etsu Chemical Co., Ltd. under the names KSP-100, KSP-101, KSP-102, KSP-103, KSP-104 and KSP-105, and the INCI name is (vinyl dimethicone / methicone Silsesquioxane) crosspolymer. Preferably, the organopolysiloxane elastomer powder coated with a silicone resin is a compound whose INCI name is a (vinyl dimethicone / methicone silsesquioxane) crosspolymer. Silicone elastomer powders that may be mentioned include powders sold under the names Trefil® Powder E-505C and Trefil® Powder E-506C by Dow Corning.

  Other silicone powders are, for example, hybrid silicone powders functionalized with fluoroalkyl groups sold under the name “KSP-200” by Shin-Etsu Chemical Co., Ltd., and “KSP- It can be a hybrid silicone powder functionalized with phenyl groups sold under the name 300 ".

  In one embodiment, (a) the first spherical silicone powder and (b) the second silicone powder are each independently from a (vinyl dimethicone / methicone silsesquioxane) crosspolymer and a polymethylsilsesquioxane powder. Selected.

  In one embodiment, (a) the first spherical silicone powder is selected from an organopolysiloxane elastomer powder coated with a silicone resin, and (b) the second silicone powder is selected from a polymethylsilsesquioxane powder. Is done.

  In another embodiment, (a) the first spherical silicone powder is selected from (vinyl dimethicone / methicone silsesquioxane) cross-polymer powder, and (b) the second silicone powder is polymethylsilsesquioxane. Selected from powder.

  (a) The first spherical silicone powder is contained in the composition according to the present invention in an amount of 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more based on the total mass of the composition. Can exist in (a) The first spherical silicone powder is contained in the composition according to the present invention in an amount of 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, based on the total mass of the composition. Can exist in

  (a) The first spherical silicone powder is 0.1% to 15% by weight, preferably 0.5% to 10% by weight, more preferably 1%, based on the total weight of the composition in the composition according to the present invention. It can be present in a content ranging from 5% to 5% by weight.

  (b) The second spherical silicone powder is contained in the composition according to the present invention in an amount of 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more based on the total mass of the composition. Can exist in (b) The second spherical silicone powder is contained in the composition according to the present invention in an amount of 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, based on the total mass of the composition. Can exist in

  (b) The second spherical silicone powder is in the composition according to the present invention, 0.1% to 15% by weight, preferably 0.5% to 10% by weight, more preferably 1%, based on the total weight of the composition. It can be present in a content ranging from 5% to 5% by weight.

  The total amount of (a) the first spherical silicone powder and (b) the second spherical silicone powder is 0.2% by mass or more, preferably 1% by mass or more, more preferably 2% by mass, based on the total mass of the composition. This can be done. The total amount of (a) the first spherical silicone powder and (b) the second spherical silicone powder is 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass, based on the total mass of the composition. It can be as follows.

  The total amount of (a) the first spherical silicone powder and (b) the second spherical silicone powder is 0.2% by mass to 20% by mass, preferably 1% by mass to 15% by mass, based on the total mass of the composition, More preferably, it can be in the range of 2% by mass to 10% by mass.

(Other ingredients)
-Lipophilic liquid substance having a refractive index of 1.48 or more The composition according to the present invention may preferably contain at least one lipophilic liquid substance having a refractive index of 1.48 or more. Two or more lipophilic liquid substances having a refractive index of 1.48 or more may be used in combination. Thus, a single type of lipophilic liquid material or a combination of different types of lipophilic liquid materials can be used.

  The term “lipophilic” means an organic compound that is hydrophobic and water insoluble at ambient temperature (25 ° C.) and atmospheric pressure (760 mmHg). The water solubility of the lipophilic liquid substance is less than 5% by weight, preferably less than 1% by weight, more preferably less than 0.1% by weight.

  The term “liquid” means that, relative to the “solid” state, the substance is in a liquid state, ie at 25 ° C. and atmospheric pressure (760 mmHg), the substance can flow under its own weight. It is.

  The lipophilic liquid material has a refractive index of at least 1.48. Preferably, the lipophilic liquid substance has a refractive index of 1.5 or higher, more preferably 1.53 or higher. The refractive index in this specification is a value measured at 25 ° C. in the present invention.

  Lipophilic liquid substances that can be used in the composition according to the invention include, for example, aromatic silicone oils and oils such as non-volatile hydrocarbon oils containing at least one phenyl group, and organic UV screening agents, and These mixtures are included.

  The expression “aromatic silicone oil” (also referred to as “phenyl silicone oil” or “phenylated silicone oil”) as used herein means a silicone oil having at least one phenyl substituent. Preferably, the aromatic silicone oil is a non-volatile oil.

The aromatic silicone oil can be selected from:
i) The following formula (I):

An aromatic silicone oil corresponding to [wherein the R groups independently represent methyl or phenyl, provided that at least one R group represents phenyl]. Preferably, in this formula, the aromatic silicone oil comprises at least 3, such as at least 4, at least 5 or at least 6 phenyl groups.

  ii) Formula (II):

An aromatic silicone oil corresponding to [wherein the R groups independently represent methyl or phenyl, provided that at least one R group represents phenyl]. Preferably, in this formula, the aromatic silicone oil comprises at least 3, for example, at least 4 or at least 5 phenyl groups.

  iii) Formula (III):

An aromatic silicone oil corresponding to [wherein Me represents methyl, y is between 1 and 1,000, and X represents —CH ₂ —CH (CH ₃ ) (Ph)].

  iv) Formula (IV) below:

[Wherein Me is methyl, Ph is phenyl, OR ′ represents an —OSiMe ₃ group, y is 0, or ranges between 1 and 1000, and z is between 1 and 1000. Aromatic silicone oil corresponding to In particular, y and z are numbers such that compound (IV) is a non-volatile oil.

  According to the first embodiment, y ranges from 1 to 1000. Usable are, for example, trimethylsiloxyphenyl dimethicone sold by the company Wacker, in particular under the reference name Belsil PDM 1000.

  According to the second embodiment, y is equal to 0. Usable are, for example, phenyltrimethylsiloxytrisiloxane sold in particular under the reference name Dow Corning 556 Cosmetic Grade Fluid (DC556).

  v) The following formula (V):

[Where:
R ₁ to R ₁₀ are, independently of one another, saturated or unsaturated, linear, cyclic or branched C _{1 to} C ₃₀ hydrocarbon-based groups;
m, n, p and q are each independently an integer between 0 and 900, provided that the sum of n + m + q is other than 0], and their aromatic silicone oils blend.

  Preferably, the sum of m + n + q is between 1 and 100. Preferably, the sum of m + n + p + q is between 1 and 900, and even better between 1 and 800. Preferably q is equal to 0.

Preferably, R ₁ to R ₁₀ independently of one another are saturated or unsaturated, preferably saturated, linear or branched C ₁ -C ₃₀ hydrocarbon groups, in particular C ₁ -C ₁₂ hydrocarbons. It represents a system group, specifically C ₃ -C ₁₆ , more specifically C ₄ -C ₁₀ , or a monocyclic or polycyclic C ₆ -C ₁₄ , especially a C ₁₀ -C ₁₃ aryl group, or an aralkyl group. Preferably, R ₁ to R ₁₀ each represent a methyl, ethyl, propyl, butyl, isopropyl, decyl, dodecyl or octadecyl group, or a phenyl, tolyl, benzyl or phenethyl group. R ₁ to R ₁₀ may be particularly the same or may be a methyl group.

  vi) the following formula (VI):

[Where:
R ₁ to R ₆ are, independently of one another, saturated or unsaturated, linear, cyclic or branched C _{1 to} C ₃₀ hydrocarbon-based groups, preferably R ₁ to R ₆ are C ₁ -C ₃₀ alkyl group, an aryl group or an aralkyl group,
-m, n and p are each independently an integer between 0 and 100, provided that the sum of n + m is between 1 and 100], and mixtures thereof .

Preferably, R ₁ to R ₆ are, independently of one another, a saturated or unsaturated, preferably saturated, linear or branched C ₁ -C ₃₀ hydrocarbon group, in particular a C ₁ -C ₁₂ hydrocarbon. It represents a system group, specifically C ₃ -C ₁₆ , more specifically C ₄ -C ₁₀ , or monocyclic or polycyclic C ₆ -C ₁₄ and especially C ₁₀ -C ₁₃ aryl groups, or aralkyl groups. Preferably, R ₁ to R ₆ each represent a methyl, ethyl, propyl, butyl, isopropyl, decyl, dodecyl or octadecyl group, or a phenyl, tolyl, benzyl or phenethyl group.

R ₁ to R ₆ may be particularly the same or may be a methyl group. Preferably, in formula (VI), m = 1 or 2 or 3, and / or n = 0 and / or p = 0 or 1 may be applied.

  vii) Formula (VII):

[Where:
R ₁ , R ₂ , R ₅ and R ₆ together or separately are alkyl groups containing 1 to 6 carbon atoms;
R ₃ and R ₄ together or separately are alkyl groups containing 1 to 6 carbon atoms, or aryl groups, provided that at least one of R ₃ and R ₄ is a phenyl group,
X is an alkyl group, hydroxyl group or vinyl group containing 1 to 6 carbon atoms;
n and p are integers greater than or equal to 1 and are selected so as to obtain an oil having a weight average molecular mass of less than 200,000 g / mol, preferably less than 150,000 g / mol, more preferably less than 100,000 g / mol] Aromatic silicone oils and mixtures thereof.

Examples of preferred aromatic silicone oils that may be mentioned include the following silicone oils:
-Phenyl silicone oil preferably selected from: tetramethyltetraphenyltrisiloxane (e.g. PH-1554 HRI or Dow Corning 554 Cosmetic Fluid from Dow Corning), trimethylsiloxyphenyl dimethicone (e.g. Belsil PDM 1000 from Wacker) (See (IV))), phenyl trimethicone (for example, phenyl trimethicone sold under the name DC556 by Dow Corning), phenyl dimethicone, phenyl trimethylsiloxy diphenyl siloxane, diphenyl dimethicone (for example, manufactured by Shin-Etsu Chemical Co., Ltd.) KF-54 (400 cSt), Shin-Etsu Chemical KF54HV (5000 cSt), Shin-Etsu Chemical KF-50-300CS (300 cSt), Shin-Etsu Chemical KF-53 (175 cSt), Shin-Etsu Chemical Industry KF-50-100CS (100 cSt)), diphenylmethyldiphenyltrisiloxane, 2-phenylethyl trimethylsiloxysilicate, Trimethyl pentaphenyl trisiloxane (e.g., Dow Corning Corporation, sold under the name Dow Corning PH-1555 HRI Cosmetic fluid by product),
as well as
-A mixture of them is included.

Aromatic silicone:
-Phenyltrimethicone,
-Diphenylsiloxyphenyl dimethicone,
-Trimethylpentaphenyltrisiloxane,
-Phenyl dimethicone,
-Phenyltrimethylsiloxydiphenylsiloxane,
-Diphenyl dimethicone,
-Diphenylmethyldiphenyltrisiloxane, and
-2-phenylethyl trimethylsiloxysilicate, and
-More preferably selected from mixtures thereof.

  Preferably, the weight average molecular weight of the aromatic silicone oil according to the invention is in the range of 500 to 10,000 g / mol, more preferably 500 to 5,000 g / mol, in particular 500 to 1,000 g / mol.

  In one embodiment, the aromatic silicone oil is selected from one or more aromatic silicone oils without a dimethicone moiety.

  Preferably, the aromatic silicone oil has at least one Si (silicon) atom bonded directly to at least one alkyl group, which is not at the end of the main chain. That is, the aromatic silicone oil preferably has an alkylsiloxane unit in the main chain, not at the end of the main chain.

  Preferably, the aromatic silicone oil has at least one Si atom substituted with at least one phenyl group at the end of the main chain.

  Most preferably, (b) the aromatic silicone oil has the formula (VIII):

[Wherein Me represents methyl and Ph represents phenyl].

The non-volatile hydrocarbon oil containing at least one phenyl group used in the present invention is preferably a C ₁₂ -C ₁₅ alkyl benzoate.

  Organic UV screening agents are also called “lipophilic UV screening agents”. Organic UV screening agents used in the present invention are not limited, but include triazine compounds, para-aminobenzoic acid compounds, salicylic acid compounds, cinnamic acid compounds such as ethylhexyl methoxycinnamate, β, β-diphenyl. Acrylate compounds such as octocrylene, benzylidene camphor compounds, phenylbenzimidazole compounds, imidazoline compounds, benzalmalonate compounds, and merocyanine compounds, and combinations thereof can be included.

  The lipophilic liquid substance can be present in a content of 0.1% by weight or more, preferably 1% by weight or more, more preferably 3% by weight or more, in particular 5% by weight or more, based on the total weight of the composition. The lipophilic liquid substance can be present in a content of 20% by weight or less, preferably 15% by weight or less, more preferably 12% by weight or less, in particular 10% by weight or less, relative to the total weight of the composition.

  The lipophilic liquid substance is 0.1% to 20% by weight, preferably 1% to 15% by weight, more preferably 3% to 12% by weight, in particular 5% to 10% by weight relative to the total weight of the composition. It can be present in a content in the range of mass%.

Filler The composition according to the invention can preferably comprise one or more organic fillers and / or inorganic fillers in addition to the spherical silicone powder.

  The term “filler” is to be understood as meaning particles of any shape, colorless or white, inorganic or synthetic, which are insoluble in the medium of the composition, regardless of the temperature at which the composition is produced. It is.

  The filler may be in any shape regardless of the crystal form (for example, layered, cubic, hexagonal, orthorhombic, etc.), and may be platelet-shaped, spherical, or oblong.

  As inorganic fillers, talc, mica, silica, magnesium aluminum silicate, trimethylsiloxysilicic acid, kaolin, benton, calcium carbonate, magnesium hydrogen carbonate, hydroxyapatite, boron nitride, fluorophlogopite, sericite, calcined talc, calcined Mica, calcined sericite, synthetic mica, lauroyl lysine, metal soap, bismuth oxychloride, barium sulfate, magnesium carbonate, and mixtures thereof can be mentioned, and these are optionally treated with hydrophilic treatment or hydrophobic treatment. Yes. The inorganic filler is preferably surface-treated hydrophobic with, for example, silicone or amino acid. For example, mica or silica that has been surface-treated hydrophobic with silicone can be used.

  (Meth) acrylic powder or (meth) acrylate powder, for example, polymethyl methacrylate powder; polyacrylonitrile powder; organopolysiloxane powder, polyamide powder, poly-β-alanine powder and polyethylene powder, polytetrafluoro Ethylene powder, lauroyl lysine, starch, tetrafluoroethylene polymer powder, eg hollow polymer microspheres containing acrylic acid (alkyl), metal soaps derived from organic carboxylic acids containing 8 to 22 carbon atoms, eg zinc stearate , Magnesium stearate, lithium stearate, zinc laurate, magnesium myristate, silicone resin microbeads, polyurethane powder, for example, sold under the name Plastic Powder D-400 by Toyo Pigment Co., Ltd. Powder, carnauba microwax, synthetic microwax, carnauba wax formed with Samethylene diisocyanate / trimethylol hexyl lactone copolymer (CTFA name: (HDI / Trimethylol Hexyllactone Crosspolymer)) Mention may be made of microwaxes formed from mixtures of polyethylene waxes, microwaxes formed from mixtures of carnauba wax and synthetic waxes, and polyethylene microwaxes.

  The filler should be present in a content ranging from 10% to 90% by weight, preferably from 30% to 85% by weight, more preferably from 50% to 80% by weight, based on the total weight of the composition. Can do.

Colorant The composition according to the invention is preferably one or more colorants which can be chosen from pigments, fat-soluble dyes, nacres and glitter flakes, and mixtures thereof, well known to those skilled in the art Can be included. In particular, the composition comprises a pigment as a colorant.

  The term “pigment” should be understood as meaning white or colored, inorganic or organic particles which are insoluble in aqueous solution. Pigments that can be used in the present invention include titanium oxide, zirconium oxide or cerium oxide, as well as zinc oxide, iron oxide or chromium oxide, ferric blue, manganese violet, ultramarine blue and chromium hydrate. it can. The pigment is preferably hydrophobically treated with, for example, silicone or amino acid. For example, titanium dioxide surface-treated with silicone can be used.

  The colorant should be present in a content ranging from 0.1% to 20% by weight, preferably from 1% to 15% by weight, more preferably from 2% to 10% by weight, relative to the total weight of the composition. Can do.

Inorganic UV screening agent The composition according to the invention can preferably comprise at least one inorganic UV screening agent. Inorganic UV screening agents can be selected from metal oxides, such as titanium oxide (amorphous or crystalline, in the form of rutile and or anatase), zinc oxide, zirconium oxide or cerium oxide, which are All are well known as UV photoprotectors. The inorganic UV screening agent is preferably nanoparticles. For example, nano titanium dioxide can be used as an inorganic UV screening agent.

-Additives The composition according to the present invention may contain such additives as long as the additives do not impair the effects of the present invention and are acceptable for cosmetic use. Additives include plant or animal-derived oils, synthetic oils, silicone oils, hydrocarbon oils, and aliphatic alcohols; anionic, cationic, nonionic or amphoteric polymers; natural or synthetic thickening Agents; lubricants or dispersants such as sorbitan fatty acid esters such as sorbitan sesquioleate; gelling agents; natural extracts derived from animals or plants; waxes; cosmetically acceptable hydrophobic organic solvents; peptides and derivatives thereof Protein hydrolysates; preservatives; auxiliary preservatives; bactericides; vitamins or provitamins; fragrances; stabilizers, and mixtures thereof.

  The amount of additive is not limited, but can be 0.1 to 30% by weight relative to the total weight of the composition according to the invention.

  The composition of the present invention can be a cosmetic composition, preferably a solid cosmetic composition for keratin materials such as the face, neck and body skin, more preferably It can be a cosmetic makeup composition for skin. The composition according to the invention can be provided in the form of a compact powder, in particular a powder foundation or loose powder.

  The composition according to the invention is preferably anhydrous or contains less than 3% by weight of water, preferably less than 1% by weight, based on the total weight of the composition. The term “anhydrous” preferably means that no water is intentionally added to the composition, more preferably no water is present in the composition, but in the various compounds used in the composition. It means in particular that trace amounts of water may be present.

  A composition according to the present invention comprises (a) a first spherical silicone powder, (b) a second spherical silicone powder, and optionally one or more other components, and a mixer such as a Henschel mixer. To obtain a powdery mixture. The resulting mixture can then be pulverized with a pulverizer such as a pin mill and a hammer mill and then sieved with a sieve. If the composition according to the invention is in the form of a compact powder, the mixture can be further pressed into a dish with a press.

[Makeup method]
The composition according to the invention can preferably be used as a cosmetic composition for keratin substances such as skin. In particular, the composition according to the invention is used, for example, on the skin of the face, neck and body, to create an attractive appearance, to hide defects such as stains, wrinkles, pores etc. and to protect keratin materials from UV rays. It can be intended to be applied to keratin materials such as. The composition is generally applied with a sponge applicator to keratin materials such as skin.

  The invention therefore also relates to a cosmetic method comprising the step of applying the composition according to the invention to the skin, preferably facial skin. The cosmetic method preferably comprises a step of making up and / or caring for the skin, preferably the facial skin. The composition can be taken up by scraping the powder with an applicator such as a sponge, puff or brush. The composition is then transferred from the applicator to the skin by bringing the applicator into contact with the skin.

  The composition used according to the invention is preferably intended for use as a leave-in type cosmetic composition. The term “leave-in” means a composition that is not intended to be washed off or removed immediately after application.

  According to the improved effect of covering the skin defects of the present invention, the cosmetic method according to the present invention can provide an improved effect of covering the skin defects. In particular, the makeup method according to the present invention can impart an excellent effect of hiding pores. Furthermore, the improved effect of covering the skin disadvantages of the present invention eliminates the need for consumers to apply large amounts of the composition to keratin materials, such as facial skin. Thus, the cosmetic method according to the present invention can also create a more natural and semi-matte appearance due to the reduced amount of composition to be applied.

  The present invention also provides at least one first (a) average primary particle size of 7 μm or more, preferably 10 μm or more as a makeup active in a cosmetic composition, preferably in a solid skin care cosmetic composition. It also relates to the use of a combination of 1 spherical silicone powder and (b) at least one second spherical silicone powder having an average primary particle size of 3 μm or less, preferably 1 μm or less.

  The present invention will be described in more detail through examples. However, these examples should not be construed as limiting the scope of the invention.

[Composition]
The compositions of Examples 1 to 3 and Comparative Examples 1 and 2 are shown in Table 1 and were prepared according to the following preparation protocol. In Table 1, all components are based on “parts by mass” as the raw material of the active substance. (Vinyl dimethicone / methicone silsesquioxane) Crosspolymer was obtained from Shin-Etsu Chemical Co., Ltd. (trade name: KSP-102), and polymethylsilsesquioxane was obtained from Nikko Rica Corporation (trade name: MSP- N050). In Table 1, “D50 value” means the number average particle size given by the statistical particle size distribution for half of the population, and “RI” means the refractive index.

[Preparation protocol]
1) A powder mixture is prepared by mixing all powder components (components of type (a) in Table 1) with a mixer.
2) A liquid or oily component (component of type (b) in Table 1) is placed in a glass beaker and heated to about 50 ° C. to prepare a liquid phase.
3) Add the liquid phase to the powder mixture in the mixer and mix them with the mixer.
4) The obtained mixture is pulverized with a pulverizer.
5) The obtained bulk is sieved with a sieve and then pressed into a dish with a press machine to obtain a test sample.

[Evaluation]
The performance of the effect of hiding pores in each of the test compositions of Examples 1 to 3 and Comparative Examples 1 and 2 was evaluated by the following test. Each of the test compositions and a conventional powder cosmetic composition was applied to the facial skin of six females with an applicator by a skilled esthetician. The makeup finish of each of the test compositions was then compared to a conventional powder cosmetic composition under controlled light conditions. The effect of hiding pores was evaluated according to the following criteria.

Very good: The effect of hiding pores was remarkably good compared to the conventional powder cosmetic composition.Good: The effect of hiding pores was slightly better than the conventional powder cosmetic composition. The effect of concealing pores was equal to or lower than that of conventional powder cosmetic compositions

  The compositions of Examples 1 to 3 including spherical silicone powder having an average primary particle size of 7 μm or more and spherical silicone powder having an average primary particle size of 3 μm or less have a better effect of hiding pores than conventional powder cosmetic compositions. Indicated.

  In particular, in addition to the two spherical silicone powders, the compositions of Examples 1 and 2 containing an oleophilic liquid substance having a refractive index of 1.50 or more have the effect of concealing pores significantly better than conventional powder cosmetic compositions. Indicated. In addition to the two spherical silicone powders, the composition of Example 3 containing a lipophilic liquid material with a refractive index of 1.48 or more (but less than 1.50) hides pores slightly better than conventional powder cosmetic compositions. Showed the effect.

  On the other hand, the compositions of Comparative Examples 1 and 2 not containing a combination of a spherical silicone powder having an average primary particle size of 7 μm or more and a spherical silicone powder having an average primary particle size of 3 μm or less are the conventional powder cosmetic compositions. It showed the effect of hiding pores of equal or lower. In particular, the composition of Comparative Example 1 containing a combination of spherical silicone powders having an average primary particle size of 0.5 μm and 5 μm did not show a good pore hiding effect. Similarly, the composition of Comparative Example 2 comprising a combination of spherical silicone powders having an average primary particle size of 5 μm and 30 μm did not show a good pore hiding effect.

  These examples have great benefits since the present invention can impart superior properties that cover skin imperfections, and therefore the composition according to the present invention is a skin makeup cosmetic composition. It is clearly shown that it is extremely useful.

Claims (15)

(a) at least one first spherical silicone powder having an average primary particle size of 7 μm or more, preferably 10 μm or more, and
(b) A powdery cosmetic composition comprising at least one second spherical silicone powder having an average primary particle size of 3 μm or less, preferably 1 μm or less.   The composition of claim 1, wherein the first spherical silicone powder and the second spherical silicone powder are each independently selected from a polyorganosilsesquioxane powder and an organopolysiloxane elastomer powder coated with a silicone resin. object.   The first spherical silicone powder and the second spherical silicone powder are each independently selected from (vinyl dimethicone / methicone silsesquioxane) crosspolymer and polymethylsilsesquioxane powder. Composition.   The total amount of the first spherical silicone powder and the second spherical silicone powder is 0.2% by mass to 20% by mass, preferably 1% by mass to 15% by mass, and more preferably 2% by mass with respect to the total mass of the composition. 4. The composition according to any one of claims 1 to 3, which is in the range of from 10 to 10% by weight.   5. The composition according to any one of claims 1 to 4, further comprising at least one lipophilic liquid substance having a refractive index of 1.48 or more, preferably 1.50 or more, and even more preferably 1.53 or more.   6. The composition of claim 5, wherein the lipophilic liquid material is selected from aromatic silicone oils, non-volatile hydrocarbon oils containing at least one phenyl group, organic UV screening agents, and mixtures thereof.   7. A composition according to claim 6, wherein the aromatic silicone oil is selected from aromatic silicone oils having at least one Si atom substituted with at least one phenyl group at the end of the main chain.   7. A composition according to claim 6, wherein the organic UV screening agent is selected from ethylhexyl methoxycinnamate and octocrylene. Volatile hydrocarbon oils comprising at least one phenyl group is a benzoate C ₁₂ -C ₁₅ alkyl A composition according to claim 6.   The lipophilic liquid substance is from 0.1% by weight to 20% by weight, preferably from 1% by weight to 15% by weight, more preferably from 3% by weight to 12% by weight, in particular from 5% by weight to 10% by weight relative to the total weight of the composition. 10. Composition according to any one of claims 5 to 9, present in a content in the range of% by weight.   11. The composition according to any one of claims 1 to 10, further comprising at least one inorganic filler selected from talc, mica, synthetic mica and silica, preferably hydrophobically surface-treated.   12. The composition according to any one of claims 1 to 11, further comprising at least one organic filler.   The composition according to any one of claims 1 to 12, wherein the composition is anhydrous or contains less than 3% by weight of water, preferably less than 1% by weight of water relative to the total weight of the composition. Composition.   14. A method for preparing a composition according to any one of claims 1 to 13 by mixing a first spherical silicone powder and a second spherical silicone powder.   A cosmetic method for a keratin substance such as skin, the method comprising applying a composition according to any one of claims 1 to 13 to a keratin substance.