Solid powder cosmetic

Abstract

The present invention addresses the problem of providing a solid powder cosmetic that has a strong glitter appearance and is capable of suppressing the loss of a brilliant powder.　The solid powder cosmetic solving the problem addressed by the present invention contains components (A) through (D). (A) is a brilliant powder having an average particle diameter of at least 50 μm; (B) is an oiling agent having a refractive index at 25°C of at least 1.47; (C) is an oiling agent (other than component (B)) that is a semisolid at 25°C; and (D) is a crosslinked organopolysiloxane. The content of the component (B) in the total amount of oiling agent is at least 20 mass%.

Description

Solid powder cosmetics

[0001] The present invention relates to a solid powder cosmetic.

[0002] In solid powder cosmetics, in order to achieve a strong glitter finish, glitter powders with large particle sizes are generally blended so that the presence of each particle can be visually recognized. However, when glitter powders with large particle sizes, for example, an average particle size of 50 μm or more, are used to further enhance the glitter feel, they tend to fall off due to skin movement, etc., resulting in poor cosmetic durability. Furthermore, due to the low transparency of the base coating film, the brightness of the coating film may be lower than expected even when a glitter powder with large particle sizes is blended.

[0003] Furthermore, Patent Document 1 describes a method for producing a solid powder cosmetic, in which a cosmetic base containing glittering powder is mixed with one or more non-volatile solvents selected from the group consisting of silicone oils and hydrocarbon oils to form a slurry, which is then filled into a container and the non-volatile solvent is then removed. In such a molding method using wet filling, if the cosmetic base contains glittering powder with a large particle size, the glittering powder in the slurry may settle inside the filling nozzle, clogging the tip of the filling nozzle and making continuous filling difficult.

[0004] Japanese Patent Application Laid-Open No. 2017-222620

[0005] An object of the present invention is to provide a solid powder cosmetic that has a strong glittery feel and can suppress the shedding of glittering powder. Another object of the present invention is to provide a solid powder cosmetic that is less likely to cause nozzle clogging during filling and has excellent filling moldability when molded by a wet molding method.

[0006] The present inventors have conducted extensive research to solve the above problems and have found that by using an oil having a specific refractive index at a certain ratio in the oil and combining a semi-solid oil with a crosslinked organopolysiloxane, it is possible to contain large particle size glittering powder while preventing its shedding and to increase the brightness of the coating film. Furthermore, they have found that even when molding by wet molding, the glittering powder is less likely to settle in the slurry state mixed with a solvent, and nozzle clogging during filling is suppressed, leading to the completion of the present invention.

[0007] Means for solving the above problems include the following aspects. [1] A solid powder cosmetic comprising the following components (A) to (D): (A) a glittering powder with an average particle size of 50 μm or more, (B) an oil having a refractive index of 1.47 or more at 25°C, (C) an oil that is semi-solid at 25°C (excluding component (B)), and (D) a crosslinked organopolysiloxane, wherein the content of component (B) in the total oil is 20 mass% or more. [2] The solid powder cosmetic according to [1], which comprises, as component (A), two or more glittering powders with an average particle size of 50 μm or more. [3] The solid powder cosmetic according to [1] or [2], which comprises, as component (B), two or more oils having a refractive index of 1.47 or more at 25°C. [4] The solid powder cosmetic according to any one of [1] to [3], wherein component (B) is one or more oils selected from the group consisting of ester oils, silicone oils, and hydrocarbon oils. [5] The solid powder cosmetic according to any one of [1] to [4], wherein component (C) is one or more selected from the group consisting of hydrocarbon oils, dimer acid esters, and pentaerythritol fatty acid esters. [6] The solid powder cosmetic according to any one of [1] to [5], wherein component (D) is one or more selected from the group consisting of crosslinked polyether-modified silicones, crosslinked alkyl-polyether co-modified silicones, crosslinked polyglycerin-modified silicones, and crosslinked methylpolysiloxanes. [7] The solid powder cosmetic according to any one of [1] to [6], further containing component (E) spherical powder. [8] The solid powder cosmetic according to any one of [1] to [7], further containing component (F) oil-soluble polyurethane. [9] The solid powder cosmetic according to any one of [1] to [8], wherein the mass ratio of component (A) to component (B) (component (A) / component (B)) is 0.1 to 20.

[10] The solid powder cosmetic preparation according to any one of [1] to [9], wherein the mass ratio of component (B) to component (C) (component (B) / component (C)) is 0.1 to 20.

[0008] The solid powder cosmetic of the present invention provides a coating with a high level of brilliance, excellent adhesion of the glittering powder to the skin, and reduced shedding due to skin movement, allowing for a beautiful finish to be maintained for a long period of time and providing excellent cosmetic wear. Furthermore, upon application, the cosmetic is easily absorbed by small implements such as fingers or a cosmetic tip, does not feel powdery when spread on the skin, and provides an excellent feel when used. Furthermore, when molding by a wet molding method, the glittering powder is less likely to settle when mixed with a solvent to form a slurry, and nozzle clogging is reduced during filling, allowing for stable, continuous filling and resulting in excellent productivity.

[0009] The present invention will be described in detail below. The following description of the present invention may be based on preferred embodiments of the present invention, but the present invention is not limited to such embodiments. In this specification, (%) means (mass %). Furthermore, in this specification, unless otherwise specified, the numerical range "to" is used to mean that the numerical values ​​before and after it are included as the lower and upper limits.

[0010] [Component (A) Glittering Powder with an Average Particle Diameter of 50 μm or More] The solid powder cosmetic of the present invention contains component (A), a glittering powder with an average particle diameter of 50 μm or more. Component (A) is not particularly limited as long as it is one that is commonly used in cosmetics. Specific examples include bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, mica titanium, organic pigment-treated mica titanium, iron oxide mica titanium, Prussian blue-treated mica titanium, carmine-treated mica titanium, fish scale foil, metal- or metal oxide-coated borosilicate (Ca / Al) such as titanium oxide-coated borosilicate (Ca / Al), iron oxide-coated borosilicate (Ca / Al), silver-coated borosilicate (Ca / Al), metal- or metal oxide-coated borosilicate (Ca / titanium) such as titanium oxide-coated borosilicate (Ca / titanium), and metal- or metal oxide-coated borosilicate (Ca / Na) such as titanium oxide-coated borosilicate (Ca / Na), Examples include metal oxide-coated synthetic fluorophlogopite such as titanium dioxide-coated synthetic fluorophlogopite and iron oxide-coated synthetic fluorophlogopite; glittering powders such as resin laminate powders such as polyethylene terephthalate-aluminum-epoxy laminated powder, polyethylene terephthalate laminated powder, polyethylene terephthalate-aluminum laminated powder, polyethylene terephthalate-polyolefin laminated film powder and polyethylene terephthalate-polymethyl methacrylate laminated film powder; and metal powders such as aluminum powder, gold powder and silver powder, and these may be used alone or in combination of two or more. Among these, from the viewpoint of the brightness of the coating film, etc., mica titanium, metal oxide-coated synthetic fluorophlogopite, metal or metal oxide-coated borosilicate (Ca / Al), metal or metal oxide-coated borosilicate (Ca / Na), metal or metal oxide-coated borosilicate (Ca / titanium), polyethylene terephthalate laminated powder, and aluminum powder are preferred, and metal oxide-coated synthetic fluorophlogopite, metal or metal oxide-coated borosilicate (Ca / Al), metal or metal oxide-coated borosilicate (Ca / titanium), polyethylene terephthalate laminated powder, and aluminum powder are more preferred.

[0011] The average particle size of component (A) is 50 μm or more, and from the viewpoint of the brightness of the coating film, the lower limit is preferably 60 μm or more, more preferably 70 μm or more. The upper limit is preferably 300 μm or less, more preferably 250 μm or less. Unless otherwise specified, the "average particle size" in the present invention refers to the number average value (D50) obtained by observing the surface condition using a scanning electron microscope (JEOL Ltd., JSM-7800prime) and measuring 50 particles in an arbitrary field of view using an image analyzer (Luzex AP, Nireco Corporation). In the case of asymmetric shapes, the average particle size in the present invention is the median diameter D50 obtained from the distribution of the largest particle size.

[0012] In the solid powder cosmetic of the present invention, component (A) may be used alone, but from the viewpoint of the brightness of the applied film and the adhesion of the glittering powder, it is preferable to use two or more glittering powders with an average particle size of 50 μm or more as component (A). The two or more glittering powders with an average particle size of 50 μm or more may differ in any of the following: the type of base powder, the type of coating metal or metal oxide, the aspect ratio, the average particle size, etc. For example, it is preferable to use two or more of the above-mentioned preferred glittering powders: mica titanium, metal oxide-coated synthetic fluorophlogopite, metal or metal oxide-coated borosilicate (Ca / Al), metal or metal oxide-coated borosilicate (Ca / Na), metal or metal oxide-coated borosilicate (Ca / titanium), polyethylene terephthalate laminate powder, and aluminum powder. It is also preferable to use two or more glittering powders with different average particle sizes. The combination of glitter powders with different average particle sizes is not particularly limited, but for example, it is preferable to use a glitter powder with an average particle size of 50 μm or more and less than 120 μm in combination with a glitter powder with an average particle size of 120 to 250 μm, it is more preferable to use a glitter powder with an average particle size of 60 to 100 μm in combination with a glitter powder with an average particle size of 160 to 220 μm, and it is even more preferable to use a glitter powder with an average particle size of 60 to 100 μm in combination with a glitter powder with an average particle size of 160 μm or more and less than 200 μm.

[0013] The content of component (A) is not particularly limited, but from the viewpoint of the brightness of the coating film, etc., it is preferably in the range of 5 to 60% by mass (hereinafter simply referred to as "%") relative to the total amount of the solid powder cosmetic, more preferably 10 to 50%, even more preferably 15 to 40%, and particularly preferably 20 to 35%.

[0014] The content of component (A) in the total powder amount in the solid cosmetic powder of the present invention is preferably 15 to 90%, more preferably 20 to 70%, from the viewpoint of the adhesiveness of the glittering powder.

[0015] [Component (B) Oil with a Refractive Index of 1.47 or More at 25°C] The solid powder cosmetic of the present invention contains component (B), an oil with a refractive index of 1.47 or more at 25°C. From the viewpoint of brightness and the like, the refractive index is preferably 1.48 or more, and although there is no particular upper limit, for example, a refractive index of 1.60 or less is preferred. The "refractive index" in the present invention is measured using a commercially available refractometer. For example, a handheld refractometer R-5000 (manufactured by Atago Co., Ltd.) is used. A measurement sample is filled into a glass bottle with an outer diameter of 45 mm, an inner diameter of 38 mm, and a height of 82 mm so as to avoid air spaces, and the bottle is then capped and left to stand overnight in a thermostatic chamber at 24°C. The refractive index is obtained by reading the measured value using the refractometer the next day.

[0016] Component (B) is not particularly limited as long as it is one that is commonly used in cosmetics, and examples thereof include hydrocarbon oils, ester oils, silicone oils, etc. Examples of hydrocarbon oils include hydrogenated polyisobutene (refractive index 1.494), etc.; examples of ester oils include tritridecyl trimellitate (refractive index 1.485), alkyl benzoate (refractive index 1.48), etc.; and examples of silicone oils include diphenylsiloxyphenyl trimethicone (refractive index 1.498), diphenyldimethicone (refractive index 1.51), methylphenylpolysiloxane (refractive index 1.58), etc.

[0017] The component (B) may be used alone, but from the viewpoint of the adhesion of the glittering powder, it is preferable to use a combination of two or more oils having a refractive index of 1.47 or more at 25° C. as component (B). The combination is not particularly limited, but a combination of a hydrocarbon oil and a silicone oil or a combination of an ester oil and a silicone oil is preferable, and a combination of an ester oil and a silicone oil is more preferable.

[0018] The content of component (B) is not particularly limited, but from the viewpoint of the brightness of the coating film, the adhesion of the glittering powder, etc., it is preferably in the range of 3 to 50%, more preferably 5 to 40%, and even more preferably 10 to 30%, relative to the total amount of the solid powder cosmetic.

[0019] The content of component (B) in the total amount of oil in the solid powder cosmetic of the present invention is 20% or more, and from the viewpoints of the brightness of the applied film and the adhesion of the glittering powder, it is preferably 30 to 80%, and more preferably 35 to 75%.

[0020] The mass ratio of component (A) to component (B) (component (A) / component (B)) is not particularly limited, but is preferably in the range of 0.1 to 20, more preferably 0.5 to 10, even more preferably 1 to 8, and particularly preferably 1 to 3.

[0021] [Component (C) Oil in a semi-solid state at 25°C (excluding component (B))] The solid powder cosmetic of the present invention contains component (C), an oil in a semi-solid state at 25°C (excluding component (B)). An oil in a semi-solid state at 25°C is an oil that has a melting point of 25°C or higher but is not completely solidified at 25°C. For example, an oil that has a hardness of 20 to 1600 N at 25°C and 1 atmosphere is preferred. In the present invention, "hardness" refers to the value measured using a rheometer manufactured by Sun Scientific Co., Ltd., with a circular adapter having a pressure-sensitive shaft diameter of 2 cm, at a penetration rate of 6 cm / min and a penetration of 3 mm. Component (C) is not particularly limited as long as it is one that is commonly used in cosmetics, and examples include hydrocarbon oils, ester oils, etc., and these can be used alone or in combination of two or more types.

[0022] Examples of hydrocarbon oils include petrolatum, and examples of ester oils include lanolin, glycerin fatty acid esters, dimer acid esters, n-acylamino acid esters, pentaerythritol fatty acid esters, fatty acid cholesterol esters, and phytosterol fatty acid esters.

[0023] Examples of glycerin fatty acid esters include hexaglycerin fatty acid esters, decaglycerin fatty acid esters, (adipic acid / 2-ethylhexanoic acid / stearic acid) glyceryl oligoesters, hydrogenated castor oil stearate, hydrogenated coconut oil, hydrogenated palm oil, shea butter, tri(caprylic acid / capric acid / myristic acid / stearic acid)glyceryl, bis-diglyceryl polyacyladipate-2, and hydrogenated castor oil hydroxystearic acid; examples of dimer acid esters include dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl), dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate; and examples of n-acyl amino acid esters include N-lauroy Examples of pentaerythrityl fatty acid esters include dipentaerythrityl hexa(hydroxystearate / stearic acid / rosinate) and dipentaerythrityl tetra(hydroxystearate / isostearate); examples of fatty acid cholesterol esters include cholesteryl isostearate, cholesteryl hydroxystearate, and cholesteryl oleate; and examples of phytosterol fatty acid esters include phytosteryl palmitate, phytosteryl isostearate, phytosteryl hydroxystearate, phytosteryl oleate, dihydrophytosteryl oleate, and phytosteryl ricinoleate.

[0024] Among these, from the viewpoint of adhesion of the glittering powder, hydrocarbon oils, dimer acid esters, and pentaerythritol fatty acid esters are preferred, hydrocarbon oils and dimer acid esters are more preferred, and hydrocarbon oils are even more preferred.

[0025] The content of component (C) is not particularly limited, but from the viewpoint of removal from small objects such as fingers or tips, adhesion of the glittering powder, etc., it is preferably in the range of 0.5 to 20%, more preferably 1 to 15%, and even more preferably 5 to 10%, relative to the total amount of the solid powder cosmetic.

[0026] The mass ratio of component (A) to component (C) (component (A) / component (C)) is not particularly limited, but from the viewpoint of the lack of powdery feel of the solid powder cosmetic and the adhesion of the glittering powder, for example, it is preferably 0.5 to 30, more preferably 1 to 20, even more preferably 1.5 to 10, and particularly preferably 2 to 7.

[0027] The mass ratio of component (B) to component (C) (component (B) / component (C)) is not particularly limited, but from the viewpoint of removal from small objects such as fingers or chips and adhesion of the glitter powder, it is preferably in the range of, for example, 0.1 to 20, more preferably 0.5 to 10, and even more preferably 1 to 5.

[0028] [Component (D) Crosslinked Organopolysiloxane] The solid powder cosmetic preparation of the present invention contains component (D) a crosslinked organopolysiloxane. Component (D) is a polymer obtained by crosslinking an organopolysiloxane and having a three-dimensional crosslinked structure in part of the molecule.

[0029] Examples of component (D) include crosslinked methylpolysiloxanes such as (dimethicone / vinyldimethicone) crosspolymers crosslinked with divinyldimethylpolysiloxane, crosslinked methylphenylpolysiloxanes such as (dimethicone / phenyldimethicone) crosspolymers, crosslinked alkyl-modified silicones such as (vinyldimethicone / lauryldimethicone) crosspolymers, crosslinked polyether-modified silicones such as (dimethicone / (PEG-10 / 15)) crosspolymers, crosslinked alkyl / polyether co-modified silicones such as (PEG-15 / lauryldimethicone) crosspolymers, and crosslinked polyglycerin-modified silicones such as (dimethicone / polyglycerin-3) crosspolymers, and the like, and these can be used alone or in combination of two or more. Among these, from the viewpoint of adhesion of the glittering powder, crosslinked polyether-modified silicones having hydrophilic groups, crosslinked alkyl-polyether co-modified silicones, and crosslinked polyglycerin-modified silicones are preferred, and crosslinked polyether-modified silicones and crosslinked alkyl-polyether co-modified silicones are more preferred. Furthermore, when two or more types are contained, it is even more preferred to contain crosslinked methylpolysiloxane.

[0030] Commercially available products of component (D) include, for example, dimethicone crosspolymers such as DOWSIL 9040 SILICONE ELASTOMER BLEND (88% volatile cyclomethicone solution), DOWSIL EL-9140 SILICONE ELASTOMER BLEND (85% volatile dimethicone solution), DOWSIL 9541 SILICONE ELASTOMER BLEND (84% volatile dimethicone solution), and DOWSIL EL-8040 ID SILICONE ORGANIC BLEND (82% volatile isododecane solution) (all manufactured by Dow-Toray Industries, Inc.), and BELSIL EG1200 (86% dimethicone solution) (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.); (dimethicone / vinyl dimethicone) crosspolymers such as KSG-6 (40% dimethicone solution), KSG-15 (95% volatile cyclomethicone solution), KSG-16 (75% dimethicone solution), KSG-016F (75% dimethicone solution), and KSG-19 (85% dimethicone solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL EL-9080 SILICONE ELASTOMER BLEND (86% volatile cyclomethicone solution), DOWSIL EL-9081 SILICONE ELASTOMER BLEND (86% volatile dimethicone solution) (all manufactured by Dow-Toray), and BELSIL EG7 (75% dimethicone solution) (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.); (dimethicone / phenyl vinyl dimethicone) crosspolymer KSG-18A (diphenylsiloxyphenyl trimethicone solution) (manufactured by Shin-Etsu Chemical Co., Ltd.); (divinyl dimethicone / dimethicone) crosspolymer BELSIL EG 6000 (87% dimethicone solution) (manufactured by Wacker Asahi Kasei Silicone Co., Ltd.); (vinyl dimethicone / lauryl dimethicone) crosspolymers such as KSG-41A (70% mineral oil solution), KSG-42A (80% volatile isododecane solution), and KSG-43 (70% triethylhexanoin solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.); (PEG-15 / lauryl dimethicone) crosspolymer KSG-310 (mineral oil solution) (manufactured by Shin-Etsu Chemical Co., Ltd.); (dimethicone / polyglycerin-3) crosspolymer KSG-710 (dimethicone solution) (manufactured by Shin-Etsu Chemical Co., Ltd.);Examples of (dimethicone / (PEG-10 / 15)) crosspolymers include KSG-210 (dimethicone solution) (manufactured by Shin-Etsu Chemical Co., Ltd.);

[0031] The content of component (D) is not particularly limited, but from the viewpoint of the adhesiveness of the glittering powder, it is, for example, preferably in the range of 1 to 10%, more preferably 1.5 to 7%, and even more preferably 2 to 5%, of the total amount of the solid powder cosmetic.

[0032] The mass ratio of component (A) to component (D) (component (A) / component (D)) is not particularly limited, but is preferably in the range of 1 to 15, more preferably 1.5 to 10, and even more preferably 2 to 5, from the viewpoint of, for example, the adhesion of the glittering powder.

[0033] The mass ratio of component (B) to component (D) (component (B) / component (D)) is not particularly limited, but is preferably in the range of 0.1 to 10, more preferably 0.5 to 7, and even more preferably 2 to 5, from the viewpoint of, for example, the brightness of the coating film.

[0034] The mass ratio of component (C) to component (D) (component (C) / component (D)) is not particularly limited, but is preferably in the range of 0.1 to 5, more preferably 0.5 to 4, and even more preferably 1 to 3, from the viewpoints of, for example, ease of removal onto small items such as fingers or tips, and lack of powdery feeling.

[0035] [Component (E) Spherical Powder] The solid powder cosmetic of the present invention can be made to incorporate component (E) spherical powder, thereby improving the ability to be applied to small objects such as fingers or chips. In the present invention, "spherical" includes true spheres, nearly spherical shapes, oval spheres, etc., and the ratio of major axis to minor axis is preferably 1.5 / 1 to 1 / 1, more preferably 1.2 / 1 to 1 / 1. Furthermore, part or all of the spherical surface may have minute irregularities, and the spherical surface may be either non-porous or porous.

[0036] Component (E) is not particularly limited as long as it is one commonly used in cosmetics, and examples thereof include inorganic powders such as silica and magnesium silicate, natural organic powders such as cellulose powder, starch powder, silk powder and dextrin powder, and synthetic organic powders such as nylon powder, urethane powder, polymethyl methacrylate powder and polystyrene powder. Among these, nylon powder, polymethyl methacrylate powder, cellulose powder, silica and the like are preferred. The surfaces of these spherical powders may be surface-treated with a metal oxide or the like using a known method.

[0037] The average particle size of component (E) is not particularly limited, but from the viewpoint of preventing the component (E) from coming off onto fingers, tips, or other small objects, it is preferably, for example, in the range of 1 to 50 μm, more preferably 10 to 40 μm, and even more preferably 20 to 35 μm.

[0038] The content of component (E) is not particularly limited, but from the viewpoint of the lack of a powdery feel when applied, it is preferably in the range of 1 to 15%, more preferably 1.5 to 10%, and even more preferably 2 to 7%, relative to the total amount of the solid powder cosmetic.

[0039] [Component (F) Oil-soluble polyurethane] The solid powder cosmetic of the present invention preferably contains component (F) an oil-soluble polyurethane. Component (F) can be any polyurethane that is soluble in oily components, with no particular restrictions. In the present invention, "oil-soluble" preferably means one that is soluble in 2-ethylhexanoate at 30°C to a concentration of at least 1%. The structure of component (F) is not particularly limited, but from the standpoint of a lack of powdery feel, it is preferable for it to have a hydrophobic portion (f1) and a hydrophilic portion (f2).

[0040] The hydrophobic portion (f1) preferably contains a structural unit derived from an isocyanate compound, such as 1,6-hexamethylene diisocyanate, 1,3-bis(isocyanatomethyl)benzene, 1,3-bis(isocyanatomethyl)cyclohexane, 2,4-toluene diisocyanate, and 2,6-toluene diisocyanate. Of these, 1,6-hexamethylene diisocyanate is preferred.

[0041] Furthermore, from the viewpoint of the lack of powdery feel, etc., it is preferable that the hydrophobic portion (f1) further contains a structural unit derived from a hydrogenated polyolefin polyol. Examples of hydrogenated polyolefin polyols include hydrogenated polybutadiene polyols and hydrogenated polyisoprene polyols, and among these, hydrogenated polybutadiene diols are preferred.

[0042] From the viewpoint of achieving a powdery feel, etc., it is preferable that the hydrophobic portion (f1) further contains a structural unit derived from a dimer diol. Examples of dimer diols include dimer dilinoleyl alcohol and dimer dioleyl alcohol, with dimer dilinoleyl alcohol being preferred and hydrogenated dimer dilinoleyl alcohol being particularly preferred.

[0043] The hydrophilic portion (f2) preferably contains a structural unit derived from a low molecular weight diol, from the viewpoint of not having a powdery feel, etc. Examples of the low molecular weight diol include ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, and diethylene glycol, with ethylene glycol and 1,4-butylene glycol being preferred.

[0044] Suitable embodiments of the component (F) oil-soluble polyurethane include the following (i) and (ii). In this specification, "terminal" means "both terminals." (i) (a) hydrogenated polybutadiene having isocyanate groups at the terminals and (b) HO-R ３ -OH (wherein, R ３ represents a linear or branched C2-C6 alkylene group which may have an ether bond), (ii) a polyurethane obtained by reacting (c) a hydrogenated polybutadiene having a hydroxyl group at its terminal with (d) a diisocyanate compound and (b) HO-R ３ -OH (in the formula R ３ represents a linear or branched C2-C6 alkylene group which may have an ether bond),

[0045] (a) is not particularly limited as long as it is a hydrogenated polybutadiene having an isocyanate group at its terminal, for example, a compound represented by the following general formula (1):

[0046]

[0047] (In the formula, R １ , R ２ are each independently a C1 to C6 alkylene group, n is an integer of 10 to 100, and n1 and n2 each independently represent 0 or 1.

[0048] R １ , R ２ are each independently the same or different and represent a C1 to C6 alkylene group, and the alkylene may be linear or branched. Examples of the C1 to C6 alkylene group include methylene, ethylene, n-propylene, n-butylene, n-pentylene, and n-hexylene. R １ The alkylene group in R is preferably a C1 to C2 alkylene group. ２ The alkylene group is preferably a C5 to C6 alkylene group. The alkylene group is preferably linear. n represents an integer of 10 to 100, and more preferably 15 to 55. １ , n ２ are each independently the same or different and represent 0 or 1.

[0049] The repeating unit "C" in the hydrogenated polybutadiene portion of general formula (1) (general formula (2) below) ４ H ８ There are various types of structures of ", for example, as shown in the following general formulas (3a) to (3d).

[0050]

[0051]

[0052] The hydrogenated polybutadiene portion in the hydrogenated polybutadiene having an isocyanate group at its terminal may consist of only one of the repeating units exemplified above, or may contain two or more repeating units arranged regularly or randomly. ４ H ８ " may have the same or different stereostructures, and all structures in which the hydrogenated polybutadiene portion is represented by general formula (2) are encompassed by the present invention. Examples of hydrogenated polybutadienes having an isocyanate group at their terminals, represented by general formula (1), include compounds represented by the following general formula (4).

[0053]

[0054] (wherein, n represents an integer of 10 to 100) The compound of general formula (4) is a hydrogenated polybutadiene having an isocyanate group at the end of the general formula (1), １ is an ethylene group, R ２ is a hexamethylene group, n １ = n ２ This corresponds to the case where .times. ...

[0055] (b) HO-R ３ -OH (wherein, R ３ represents a linear or branched C2 to C6 alkylene group which may have an ether bond), examples of glycols represented by the formula (HCOOH) include ethylene glycol (HOCH ２ CH ２ OH), propylene glycol (HOCH ２ CH(OH)CH ３ ), 1,3-butylene glycol (HOCH ２ CH ２ CH(OH)CH ３ ), 1,4-butylene glycol (HOCH ２ CH ２ CH ２ CH ２ OH) and diethylene glycol (HOCH ２ CH ２ OCH ２ CH ２OH, the following general formula (5), etc.

[0056]

[0057] (c) Hydrogenated polybutadiene having terminal hydroxyl groups is not particularly limited, but examples thereof include compounds represented by the following general formula (6).

[0058]

[0059] (wherein n represents an integer of 10 to 100)

[0060] In the general formula (6), the hydrogenated polybutadiene moiety (general formula (2)) has the same meaning as above.

[0061] (d) Examples of diisocyanate compounds include 1,6-hexamethylene diisocyanate, 1,3-bis(isocyanatomethyl)benzene, 1,3-bis(isocyanatomethyl)cyclohexane, 2,4-toluene diisocyanate, and 2,6-toluene diisocyanate. Among these, 1,6-hexamethylene diisocyanate represented by the following general formula (7) is preferred.

[0062]

[0063] (i): (a) hydrogenated polybutadiene with isocyanate groups at the terminals and (b) HO-R ３ -OH (wherein, R ３ represents a linear or branched C2-C6 alkylene group which may have an ether bond), the molar ratio (a):(b) is preferably 1:4 to 4:1, more preferably 2:3 to 3:2, even more preferably 4:5 to 4:3, and still more preferably 9:10 to 10:9. In this case, the weight average molecular weight (Mw) of (a) is preferably 1,000 to 3,000.

[0064] (ii): (c) Hydrogenated polybutadiene having hydroxyl groups at the terminals, (d) Diisocyanate compound, and (b) HO-R ３ -OH (in the formula R ３represents a linear or branched C2-C6 alkylene group which may have an ether bond), the molar ratio (c):(b) is preferably 1:4 to 4:1, more preferably 2:3 to 3:2, even more preferably 4:5 to 4:3, and still more preferably 9:10 to 10:9.

[0065] The weight average molecular weight (Mw) of the polyurethane obtained in (i) or (ii) is preferably 10,000 to 150,000, more preferably 15,000 to 130,000, and even more preferably 20,000 to 110,000.

[0066] The polyurethanes of (i) or (ii) form multiple ring-shaped clusters (clusters) by associating with each other at the hydrophilic parts within the molecules, and have a hydrophilic group associative thickening mechanism when the hydrophobic parts within the molecules come into contact with oil agents such as the above-mentioned components (B) and (C).It is presumed that the three-dimensional structures are finely divided based on this mechanism to form a transparent gel, and that the hydrophobic parts within the molecules are low-crystalline hydrocarbons, which impart flexibility and oil-solubility, and that the polar groups of the hydrophilic parts within the molecules interact to impart gelling power and restoring power.

[0067] Examples of commercially available products of component (F) include Oilkemia 5S polymer (Lubrizol, INCI name: tri(caprylic / capric)glyceryl, polyurethane-79) (purity 30%) and Oilkemia 5S CC polymer (Lubrizol, INCI name: tri(caprylic / capric)glyceryl, hydrogenated poly(C6-20 olefin), (HDI / trimethylolhexyllactone) crosspolymer) (purity 30%).

[0068] The content of component (F) is not particularly limited, but from the viewpoint of preventing it from coming off onto small objects such as fingers or a tip, for example, the content is preferably 0.01 to 1% in terms of pure content relative to the total amount of the solid powder cosmetic, more preferably 0.02 to 0.8%, and even more preferably 0.05 to 0.5%.

[0069] [Other Components] The solid powder cosmetic of the present invention may contain other optional components within the scope that does not impair the effects of the present invention. Examples of other optional components include powders, oily components, surfactants, UV absorbers, antioxidants, cosmetic ingredients, preservatives, etc.

[0070] The powder is one other than the above components (A) and (E), and examples thereof include white inorganic pigments such as titanium oxide, zinc oxide, cerium oxide, and barium sulfate, colored inorganic pigments such as iron oxide, carbon black, titanium-titanium oxide sintered product, chromium oxide, chromium hydroxide, Prussian blue, and ultramarine, talc, mica, sericite, silica, kaolin, silicon carbide, bentonite, hectorite, smectite, aluminum oxide, magnesium oxide, zirconium oxide, antimony oxide, diatomaceous earth, aluminum silicate, aluminum magnesium metasilicate, calcium silicate, barium silicate, and silica. Examples of the pigment include white body powders such as magnesium, calcium carbonate, magnesium carbonate, hydroxyapatite, and boron nitride; organic pigment powders such as Red No. 201, Red No. 202, Red No. 205, Red No. 226, Red No. 228, Orange No. 203, Orange No. 204, Blue No. 404, and Yellow No. 401; organic pigment powders such as zirconium, barium, or aluminum lakes such as Red No. 3, Red No. 104, Red No. 106, Orange No. 205, Yellow No. 4, Yellow No. 5, Green No. 3, and Blue No. 1; metal soap powders; and organic low-molecular-weight powders such as N-acyl lysine. These can be used alone or in combination.

[0071] The oily component is one other than the solvents of components (B), (C), and (D), and examples thereof include higher alcohols such as cetearyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, arachyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, and 2-octyldodecanol; and higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid, 12-hydroxystearic acid, oleic acid, undecylenic acid, linoleic acid, ricinoleic acid, and lanolin fatty acid.

[0072] Examples of surfactants include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0073] Examples of ultraviolet absorbers include octocrylene, benzophenone-based, PABA-based, cinnamic acid-based, and salicylic acid-based absorbers, as well as 4-tert-butyl-4'-methoxydibenzoylmethane, oxybenzone, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, diethylaminohydroxybenzoylhexyl benzoate, and bisethylhexyloxyphenol methoxyphenyl triazine.

[0074] Examples of antioxidants include tocopherol and ascorbic acid, examples of cosmetic ingredients include vitamins, anti-inflammatory agents, and herbal medicines, and examples of preservatives include paraoxybenzoic acid esters, phenoxyethanol, and 1,2-pentanediol.

[0075] The solid powder cosmetic of the present invention is produced by molding a cosmetic base containing a powder as the main ingredient, with an oily component, and optionally an aqueous component, a surfactant, etc., dispersed in the powder, into a solid form. The solid powder cosmetic of the present invention can be produced by a known method, and either a dry molding method or a wet molding method may be used. When a solid powder cosmetic containing a large-particle glittering powder in the cosmetic base is produced by a wet molding method, the glittering powder settles in the slurry and is prone to clogging the filling nozzle. However, in the solid powder cosmetic of the present invention, the glittering powder does not settle in the slurry, preventing nozzle clogging and providing excellent filling moldability.

[0076] As the solvent used in the wet molding method, either non-volatile or volatile can be used, but a volatile solvent having a boiling point of 260 ° C. or less at normal pressure is preferred, specifically, low-boiling alcohols such as water, ethanol, and isopropyl alcohol as aqueous components, low-boiling hydrocarbon oils such as isododecane, isohexadecane, and light liquid isoparaffin as oil components, low-boiling hydrocarbon oils such as cetyl ethylhexanoate and hexyl laurate as oil components, low-boiling chain or cyclic silicone oils such as low-polymerization dimethylpolysiloxane, methyltrimethicone, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane, and low-boiling fluorine compounds such as low-boiling perfluoropolyethers, etc., which can be used alone or in combination as a mixture of two or more. These solvents can be removed using commonly known methods such as vacuum suction, heat drying, blotting and removal using an absorbent such as paper or nonwoven fabric during pressure application, or removal through a discharge hole provided in a press mold, etc. The amount of the solvent is not particularly limited, but is preferably 5 to 60 parts by mass, and more preferably 10 to 50 parts by mass, per 100 parts by mass of the cosmetic base.

[0077] The uses of the solid powder cosmetic of the present invention are not particularly limited, and can be used, for example, as makeup cosmetics such as eyebrows, foundations, face powders, eye shadows, and cheek colors; and basic cosmetics such as body powders and whitening powders. The method of using the solid powder cosmetic is not particularly limited, and examples include application using fingers, puffs, sponge tips, brushes, etc. Generally, when a glittering powder with a large particle size is contained, the glittering powder is densely layered and solidified during compression molding, making it difficult to apply the cosmetic to small objects such as fingers or tips. However, the solid powder cosmetic of the present invention is moderately easy to disintegrate and can be easily applied to fingers, tips, etc.

[0078] The present disclosure will be described in detail below with reference to examples, but the present disclosure is not limited to these examples.

[0079] [Examples 1 to 25 and Comparative Examples 1 to 7] Solid powder cosmetics having the compositions shown in Tables 1 to 4 below were prepared by the following manufacturing method. The obtained solid powder cosmetics were evaluated using the following methods for (a) nozzle clogging, (b) appropriate pick-up onto fingers, (c) lack of powdery feel when spreading, (d) brightness of the applied film, and (e) lack of pearly fall-off. The results are also shown in Tables 1 to 4. Note that the unit of the numerical value for the content of each component in each table is % by mass.

[0080] (Methods for Preparing Solid Powder Cosmetics of Examples 1 to 25 and Comparative Examples 1 to 7) A. Components (6) to (18) and (20) are heated to 70°C and mixed. B. Components (1) to (5) and components (19) and (21) are mixed and stirred uniformly. C. A and B are mixed uniformly at room temperature to obtain a cosmetic base. D. 10 parts by mass of isododecane and 20 parts by mass of cetyl ethylhexanoate are added to 100 parts by mass of the cosmetic base, and the mixture is mixed and kneaded to obtain a slurry-like mixture. E. The slurry-like mixture is filled into a metal dish using a 1 mm diameter nozzle, compressed to remove the solvent, and then dried at 70°C for 8 hours to obtain a solid powder cosmetic (eye shadow).

[0081] <Evaluation Method: (a) Nozzle Clogging> When the slurry mixture obtained in D above was filled into a metal dish using a nozzle with a diameter of 1 mm, the number of plates was counted until the nozzle became clogged and filling became impossible.

[0082] <Evaluation criteria> (Judgment): (Number of sheets filled) A Very good: 1000 or more B Good: 100 or more but less than 1000 C Fair: 50 or more but less than 100 D Poor: Less than 50 sheets

[0083] <Evaluation Method: (b) Adequate Adhesion to Fingers> Ten expert cosmetic evaluators confirmed how well each cosmetic was absorbed onto the fingers, and rated and scored on a three-point scale using the absolute evaluation criteria below. The average score for each cosmetic was calculated from the total scores of all panelists, and the results were judged according to the following criteria.

[0084] <Evaluation criteria> (Score): (Evaluation) 2: Moderately easy to remove 1: A little difficult to remove or a little too much removed 0: Difficult to remove or too much removed

[0085] [4-level evaluation criteria] (Evaluation): (Average score) A Very good: Over 1.5 points B Good: Over 1 point and 1.5 points or less C Fair: Over 0.5 points and 1 point or less D Poor: 0.5 points or less

[0086] <Evaluation method: (c) Absence of powdery feeling when spreading> Ten cosmetic expert evaluators evaluated the absence of powdery feeling when each cosmetic was spread on the eyelids using the absolute evaluation criteria below, assigning a score on a 5-point scale. The average score for each cosmetic was calculated from the total scores of all panelists, and the result was judged according to the following criteria.

[0087] <Evaluation criteria> (Score): (Evaluation) 4: No powdery feeling 3: Almost no powdery feeling 2: Average 1: Slightly powdery feeling 0: Powdery feeling

[0088] [4-level evaluation criteria] (Evaluation): (Average score) A Very good: Over 3 points B Good: Over 2 points and 3 points or less C Fair: Over 1 point and 2 points or less D Poor: 1 point or less

[0089] <Evaluation Method: (d) Brightness of Applied Film> Ten cosmetic expert evaluators evaluated the brightness of the applied film when each cosmetic was applied to the eyelids, and assigned a score on a 5-point scale using the absolute evaluation criteria below. The average score for each cosmetic was calculated from the total scores of all panelists, and the score was judged according to the following criteria.

[0090] <Evaluation criteria> (Score): (Evaluation) 4: High brightness 3: Slightly high brightness 2: Average 1: Not very bright 0: No brightness

[0091] [4-level evaluation criteria] (Evaluation): (Average score) A Very good: Over 3 points B Good: Over 2 points and 3 points or less C Fair: Over 1 point and 2 points or less D Poor: 1 point or less

[0092] <Evaluation Method: (e) No Pearl Falling> Ten cosmetic expert evaluators applied each cosmetic preparation to the eyelids, stuck a piece of black tape (3 cm long x 5 cm wide) under the eyelid to collect the glitter powder that had fallen, and after 6 hours, counted the number of glitter powder particles collected on the black tape.

[0093] <Evaluation criteria> (Judgment): (Number of glittering powder particles fallen) A Very good: Less than 10 B Good: 10 or more but less than 20 C Fair: 20 or more but less than 50 D Fair: 50 or more but less than 200 E Poor: 200 or more

[0094]

[0095]

[0096]

[0097]

[0098] * 1 Microglass Metashine MT1200RR (Nippon Sheet Glass Co., Ltd.) * 2 ESORORA GLARE ULTRA GLITTER GOLD EG-7001H (CQV Co., Ltd.) * 3 Metashine MC2080PSS (Nippon Sheet Glass Co., Ltd.) * 4 Chimica Extra Large Sparkle (BASF Co., Ltd.) * 5 CLOISONNE SPARKLE ROUGE (BASF Co., Ltd.) * 6 Liponate TD™ (Vantage Specialty Ingredients Co., Ltd.) * 7 KF-56A (Shin-Etsu Chemical Co., Ltd.) * 8 Pearleem 18 (NOF Corporation) * 9 Klearol (manufactured by Sonneborn) *10 PLANDOOL-S (manufactured by Nippon Fine Chemical Co., Ltd.) *11 KSG-310 (manufactured by Shin-Etsu Chemical Co., Ltd., mineral oil solution, solvent is described in No. 16) *12 KSG-6 (manufactured by Shin-Etsu Chemical Co., Ltd., 40% dimethicone solution, solvent is described in No. 17) *13 KSG-710 (manufactured by Shin-Etsu Chemical Co., Ltd., dimethicone solution, solvent is described in No. 17) *14 Orgasol 2002 D (manufactured by Arkema) *15 Oilkemia 5S CC polymer (manufactured by Lubrizol)

[0099] As shown in Tables 1 to 4, the solid powder cosmetics of Examples 1 to 25 were excellent in all evaluation criteria, including nozzle clogging, adequate transfer onto fingers, lack of powdery feel when spreading, glossiness of the applied film, and lack of pearly falloff. In contrast, Comparative Examples 1 and 2, which did not contain component (A) or (B), produced low glossiness of the applied film. Comparative Example 3, in which the content of component (B) in the total oil amount was less than 20% by mass, produced a powdery feel when spreading and low glossiness of the applied film. Comparative Examples 4 and 5, which did not contain component (C), exhibited poor quality overall, with a large amount of glittering powder falling off, poor transfer onto fingers, and a powdery feel when spreading. Comparative Examples 6 and 7, which did not contain component (D), produced nozzle clogging immediately after filling began, poor transfer onto fingers during use, and a powdery feel when spreading.

[0100] [Example 26: Cheek color (dry molding)] (Component name) (% by mass) 1. Iron oxide-coated borosilicate (Ca / Al) (average particle size 80 μm) *16 5 2. Titanium oxide-coated synthetic fluorophlogopite (average particle size 100 μm) *17 5 3. Diphenyl dimethicone (refractive index 1.505) *18 5 4. Petrolatum 2 5. (Vinyl dimethicone / lauryl dimethicone) crosspolymer *19 3 6. Triethylhexanoin *19 5 7. Titanium mica (average particle size 27 μm) *20 5 8.2% silicone-treated talc 15 9. Mica 40 10. Titanium oxide 10 11. Zinc oxide 2 12. Iron oxide 3 *16 Microglass Metashine MT1080TA (manufactured by Nippon Sheet Glass Co., Ltd.) *17 HELIOS R100G (manufactured by Topy Industries, Ltd.) *18 KF-54 (manufactured by Shin-Etsu Chemical Co., Ltd.) *19 KSG-43 (manufactured by Shin-Etsu Chemical Co., Ltd., 70% triethylhexanoin solution, solvent is described in no. 6) *20 COSMETICA SUPER WHITE N-8000S (manufactured by CQV Co., Ltd.)

[0101] Example 26: Method for preparing cheek color A. Heat components (3) to (6) to 70°C and mix. B. Mix components (1), (2), and components (7) to (12) uniformly with stirring. C. Mix A and B uniformly at room temperature and pulverize, then fill a metal dish container and compression-molde to obtain a cheek color.

[0102] The cheek color (dry molding) described in Example 26 was excellent in all evaluation items, including the ease of application to the fingers, the lack of powdery feeling when spreading, the brightness of the applied film, and the lack of pearly fading.

[0103] Example 27: Eye shadow (wet molding) (Component name) (mass %) 1. Titanium oxide-coated borosilicate (Ca / Al) (average particle size 120 μm) *21 18 2. Titanium oxide-coated borosilicate (Ca / titanium) (average particle size 100 μm) *22 12 3. Hydrogenated polyisobutene (refractive index 1.494) *8 3 4. Di(isostearyl / phytosteryl) dimer dilinoleate (refractive index 1.491) *23 5 5. Diphenylsiloxyphenyl trimethicone (refractive index 1.498) *7 7 6. Dipentaerythrityl hexa(hydroxystearic acid / stearic acid / rosin acid) *24 9 7. (Dimethicone / vinyl dimethicone) crosspolymer (purity 60%) *12 1.2 8. 10. Dimethicone *12 2.8 11. Mica 26.4 12. Spherical silica (average particle size 3.9 μm) *25 5 13. Spherical cellulose (average particle size 30 μm) *26 2 14. Lauroyl lysine 5 15. Magnesium stearate 1 16. Ultramarines 0.5 17. Red No. 226 0.1 *21 Microglass Metashine MT1120RG (Nippon Sheet Glass Co., Ltd.) *22 ESORORA GLARE SUPER GLITTER BLUE (CQV Co., Ltd.) *23 LUSPLAN PI-DA (Nippon Fine Chemicals Co., Ltd.) *24 Cosmol 168ARN (Nisshin Oillio Co., Ltd.)* 25 God Ball D11-796C (manufactured by Suzuki Oil & Fat Industries Co., Ltd.) * 26 CELLULOBEADS D-30 (manufactured by Daito Kasei Kogyo Co., Ltd.)

[0104] Example 27: Method for preparing eye shadow A. Components (3) to (10) are heated to 70°C and mixed. B. Components (1), (2), and components (11) to (17) are mixed and stirred uniformly. C. Components A and B are mixed uniformly at room temperature to obtain a cosmetic base material. D. 40 parts by mass of dimethylpolysiloxane (kinematic viscosity at 25°C: 6 mPa·S) is added to 100 parts by mass of the cosmetic base material, and the mixture is mixed and kneaded to obtain a slurry-like mixture. E. The slurry-like mixture is filled into a metal dish using a 2 mm diameter nozzle, and the dimethylpolysiloxane is removed while being compressed to obtain an eye shadow.

[0105] The eye shadow (wet molding) described in Example 27 was excellent in all evaluation items, including no nozzle clogging, adequate pick-up onto fingers, no powdery feeling when spread, the brightness of the applied film, and no pearly fall-off.

Claims

1. A solid powder cosmetic comprising the following components (A) to (D): (A) a glittering powder having an average particle size of 50 μm or more; (B) an oil having a refractive index of 1.47 or more at 25°C; (C) an oil that is semi-solid at 25°C (excluding component (B)); and (D) a crosslinked organopolysiloxane, wherein the content of component (B) in the total amount of oil is 20 mass% or more.

2. A solid powder cosmetic according to claim 1, comprising as component (A) two or more glittering powders having an average particle size of 50 μm or more.

3. A solid powder cosmetic according to claim 1 or 2, comprising as component (B) two or more oils having a refractive index of 1.47 or more at 25°C.

4. A solid powder cosmetic preparation according to claim 1 or 2, wherein component (B) is one or more oils selected from the group consisting of ester oils, silicone oils, and hydrocarbon oils.

5. A solid powder cosmetic preparation according to claim 1 or 2, wherein component (C) is one or more selected from the group consisting of hydrocarbon oils, dimer acid esters, and pentaerythritol fatty acid esters.

6. A solid powder cosmetic preparation according to claim 1 or 2, wherein component (D) is at least one selected from the group consisting of crosslinked polyether-modified silicone, crosslinked alkyl-polyether co-modified silicone, crosslinked polyglycerin-modified silicone, and crosslinked methylpolysiloxane.

7. A solid powder cosmetic preparation according to claim 1 or 2, further comprising component (E) spherical powder.

8. A solid powder cosmetic preparation according to claim 1 or 2, further comprising component (F) an oil-soluble polyurethane.

9. The solid powder cosmetic preparation according to claim 1 or 2, wherein the mass ratio of component (A) to component (B) (component (A) / component (B)) is 0.1 to 20.

10. The solid powder cosmetic preparation according to claim 1 or 2, wherein the mass ratio of component (B) to component (C) (component (B) / component (C)) is 0.1 to 20.

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