Solid powder cosmetics

Abstract

This invention provides a solid powder cosmetic that can impart a natural shine and transparency without an unnatural opacity, even without containing plastic microbeads, and also has a smooth feel when applied and sufficient impact resistance. [Solution] A solid powder cosmetic containing the following ingredients (A) to (D). (A) Bright powder with an average particle size of 45 μm or more and 60 μm or less (B) Shiny powder with an average particle size of 15 μm or more and 25 μm or less (C) Maika (D) Calcium carbonate

Description

Technical Field

[0001] The present invention relates to a solid powder cosmetic that provides a natural gloss and a transparent finish, has an excellent smooth feel in use, and is excellent in impact resistance.

Background Art

[0002] Conventionally, foundations have been mainly used for the purpose of hiding skin defects such as uneven skin color such as freckles and dark circles under the eyes, acne marks, and unevenness such as pores. In recent years, as consumer needs, there has been a demand for foundations that not only hide defects but also create a more beautiful skin by producing a natural gloss and transparency. In order to hide skin defects, it is necessary to contain pigments such as titanium oxide and iron oxide to increase the covering power. However, if a large amount of these pigments is contained, an unnatural hiding feeling occurs, and the natural gloss and transparency are lost. In addition, in order to produce a natural gloss and transparency, a method of containing a large amount of shiny powders such as fine and highly glossy pearls has been proposed (Patent Document 1), but there is a problem that the smooth feel in use and the impact resistance are insufficient.

[0003] Furthermore, in solid powder cosmetics, plastic microbeads have been blended in order to obtain a natural gloss and a smooth feel in use (Patent Documents 2 and 3). However, in recent years, due to concerns about the adverse effects on the ecosystem, regulations on plastic microbeads have been spreading, and cosmetics that do not contain plastic microbeads are required. However, when preparing a solid powder cosmetic without containing plastic microbeads, there is a problem that the natural gloss and the smooth feel in use are inferior. Plastic microbeads refer to solid synthetic polymers of 5 mm or less. For example, powders and fibers such as nylon, acrylate, polyethylene, polystyrene, polyethylene terephthalate, polyurethane, and organopolysiloxane can be mentioned, and natural-derived polymers such as cellulose and inorganic polymers such as glass do not fall under this category.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Publication No. 2006-265180 [Patent Document 2] Japanese Patent Publication No. 2010-174006 [Patent Document 3] Japanese Patent Publication No. 2021-080182 [Overview of the project] [Problems that the invention aims to solve]

[0005] Thus, achieving natural gloss, transparency, a smooth feel, and impact resistance all at once has been extremely difficult. Therefore, the objective of the present invention is to provide a solid powder cosmetic that achieves a highly transparent finish without containing plastic microbeads, while also having a smooth feel and good impact resistance. [Means for solving the problem]

[0006] As a result of diligent research under these circumstances, the inventors have found that a solid powder cosmetic composition that satisfies the above requirements can be obtained by including the following components (A) to (D).

[0007] In other words, the present invention is a solid powder cosmetic composition containing the following components (A) to (D). (A) Bright powder with an average particle size of 45 μm or more and 60 μm or less (B) Shiny powder with an average particle size of 15 μm or more and 25 μm or less (C) Maika (D) Calcium carbonate [Effects of the Invention]

[0008] The solid powder cosmetic of the present invention can provide a natural gloss and transparency without an unnatural opacity, even without containing plastic microbeads, and also has a smooth feel when applied, as well as sufficient impact resistance as a solid powder cosmetic. [Modes for carrying out the invention]

[0009] The present invention will be described in detail below. Note that all percentages used in this invention represent mass percentages.

[0010] The glossy powders of components (A) and (B) used in the present invention have an average particle size of 45 μm to 60 μm, and an average particle size of 15 μm to 25 μm, from the viewpoint of having excellent natural gloss and transparency in the finished product, smoothness during application, and impact resistance.

[0011] The lustrous powders of components (A) and (B) can be used without particular restrictions as long as their average particle size is within the above range and they are commonly used in cosmetics. However, from the viewpoint of obtaining a highly transparent finish, examples of plate-like powders that serve as the base material include mica, synthetic mica (synthetic fluorphlogopite), alumina, and glass flakes, with mica being more preferred. As the coating powder, one or more selected from titanium dioxide, iron oxide, and silica are preferred.

[0012] Specifically, these include titanium dioxide-coated mica (mica surface coated with titanium dioxide), iron oxide-coated mica (mica surface coated with iron oxide), iron oxide / titanium dioxide-coated mica (mica surface coated with iron oxide and then further coated with titanium dioxide), titanium dioxide / silica-coated mica (mica surface coated with titanium dioxide and then further coated with silica), titanium dioxide-coated synthetic mica (synthetic mica surface coated with titanium dioxide), iron oxide-coated synthetic mica (synthetic mica surface coated with iron oxide), and iron oxide-coated synthetic mica (synthetic mica surface coated with iron oxide and then further coated with titanium dioxide). Examples include titanium dioxide-coated synthetic mica, titanium dioxide-silica-coated synthetic mica obtained by coating the surface of synthetic mica with titanium dioxide and then further coating it with silica, titanium dioxide-coated glass flakes obtained by coating the surface of glass flakes with titanium dioxide, iron oxide-coated glass flakes obtained by coating the surface of glass flakes with iron oxide, iron oxide-titanium dioxide-coated glass flakes obtained by coating the surface of glass flakes with iron oxide and then further coating it with titanium dioxide, and titanium dioxide-silica-coated glass flakes obtained by coating the surface of glass flakes with titanium dioxide and then further coating it with silica.

[0013] Examples of such components (A) include Timiron Gleamer Flake MP-45 (manufactured by Merck KGaA) and Timica Extra Large Sparkle 110S (manufactured by DIC Corporation), while examples of components (B) include Timiron Starluster MP-115 (manufactured by Merck KGaA), Flamenco Super Pearl 120C (manufactured by DIC Corporation), Microglass Metashine MT1020RS (manufactured by Nippon Sheet Glass Co., Ltd.), and Timiron Splendid Gold (manufactured by Merck KGaA).

[0014] Furthermore, the average particle size in this invention is a value measured using a laser diffraction particle size measuring device.

[0015] The glossy powders of components (A) and (B) may be used with or without surface treatment, and examples of surface treatments include silicone treatment.

[0016] Furthermore, from the viewpoint of obtaining a more natural shine, transparency, smooth feel, and impact resistance, the content of component (A) in the solid powder cosmetic is preferably 0.7% to 5.0%, and the content of component (B) is preferably 1.0% to 5.0%.

[0017] The component (C) used in the present invention is not particularly limited as long as it is mica that is commonly used in cosmetics.

[0018] From the viewpoint of obtaining a more natural luster, mica with an average particle size of 10 μm to 30 μm is more preferable. For example, mica powder Y-2300 (manufactured by Yamaguchi Mica Co., Ltd.) can be used as component (C).

[0019] The mica of component (C) may be used with or without surface treatment, but from the viewpoint of obtaining a smoother feel and better impact resistance, surface-treated mica is preferred, metal soap treatment is more preferred, and magnesium stearate treatment is most preferred. Also, the amount of surface treatment is not particularly limited, but from the viewpoint of obtaining a smoother feel and better impact resistance, it is preferably 0.3% or more and 5.0% or less.

[0020] One or more kinds of mica of component (C) can be used in combination. The content of component (C) in the solid powder cosmetic is preferably 3.0% or more from the viewpoint of obtaining a natural gloss and a smoother feel, and preferably 15.0% or less from the viewpoint of obtaining a smoother feel.

[0021] Component (D) used in the present invention is calcium carbonate, and it can be used without particular limitation as long as it is generally used in cosmetics. Examples of the shape of calcium carbonate include spherical and petal-shaped, but the shape is preferably spherical in order to obtain a smoother feel. Particularly preferred is spherical calcium carbonate with an average particle size of 5 μm or more and 30 μm or less. Also, as the particle structure, either porous or non-porous can be used. Examples of commercially available products of such component (D) calcium carbonate include HPC-S (manufactured by Hokkaido Lime Chemical Co., Ltd.), Karurite-SA (manufactured by Shiraishi Kogyo Co., Ltd.), NL-QC10, NL-QC20 (manufactured by New Lime Co., Ltd.), Karumaru SCS-M5 (manufactured by Sakai Chemical Industry Co., Ltd.), etc.

[0022] The calcium carbonate of component (D) may be used with or without surface treatment, but from the viewpoint of obtaining a smoother feel, surface-treated calcium carbonate is preferred, sucrose fatty acid ester treatment is more preferred, and sucrose polystearate treatment is most preferred. Also, the amount of surface treatment is not particularly limited, but from the viewpoint of obtaining a smoother feel, it is preferably 0.3% or more and 5.0% or less.

[0023] The calcium carbonate of component (D) can be used alone or in combination of two or more. From the viewpoint of obtaining a smooth feeling of use and impact resistance, the content of component (D) in the solid powder cosmetic is preferably 2.0% or more, and from the viewpoint of obtaining better impact resistance, it is preferably 8.0% or less.

[0024] In the solid powder cosmetic of the present invention, components usually used in ordinary cosmetics such as powders, oils, additives, etc. other than components (A) to (D) can be appropriately used.

[0025] For example, powders include inorganic powders such as talc, synthetic mica, barium sulfate, alumina, silica, boron nitride, titanium oxide, iron oxide, etc., and natural organic powders such as silk powder, cellulose powder, etc. One or more of these can be used. Further, these powders may be surface-treated with treatment agents such as silicone, fluorine compounds, fatty acids, metal soaps, oils, surfactants, etc. and then used.

[0026] Also, the oil can be any oil usually used in ordinary cosmetics. For example, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, silicone oils, fluorine-based oils such as perfluoroalkyl ethers, etc. can be mentioned.

[0027] In addition to the above components, other components generally used in cosmetics may be contained. For example, fragrances, medicinal components, surfactants, cooling agents, ultraviolet absorbers, stabilizers, antioxidants, pH adjusters, viscosity adjusters, preservatives, beauty components, etc. can be mentioned.

[0028] The cosmetic base material of the present invention is prepared by using an apparatus for producing ordinary powder cosmetics and stirring and mixing the above components. Specifically, first, the oil is mixed and heated and dissolved as necessary. On the other hand, the powders containing components (A) to (D) are uniformly mixed. The oil is added to this powder and uniformly dispersed, and then pulverized to prepare the cosmetic base material. The cosmetic base material thus obtained is subjected to consolidation molding.

[0029] The solid powder cosmetic composition of the present invention can be used as a foundation, face powder, face color, eye color, etc. It is particularly suitable for foundations and face powders where a natural shine, transparency, and smooth feel are desired, and is especially suitable for foundations. [Examples]

[0030] Next, the present invention will be described in more detail with reference to examples. The present invention is not limited thereto. The values ​​in the table indicate the content (%). Examples 1-19 and Comparative Examples 1-8: Powder Foundation

[0031] [Table 1] *1: Timiron Gleamer Flake MP-45 (manufactured by Merck KGaA) *2: Timiron Starluster MP-115 (manufactured by Merck KGaA) *3: Timiron Diamond Cluster MP-149 (manufactured by Merck KGaA) *4: Timiron Sparkle MP-47 (manufactured by Merck KGaA) *5: Timiron Supersheen MP-1001 (manufactured by Merck KGaA) *6: Mica powder Y-2300 (manufactured by Yamaguchi Mica Co., Ltd., average particle size 19 μm) *7: 1% surface-treated version of *6 *8: NL-QC10 (manufactured by New Lime Co., Ltd., average particle size 20 μm) *9: 2.5% surface-treated version of *8

[0032] (Manufacturing method) Examples 1-19, Comparative Examples 1-8 A: Mix oil components 14-17 and heat to dissolve. B: Mix powder ingredients 1-13 uniformly. C:A is added to B and uniformly dispersed, then pulverized to obtain a cosmetic base. D:C is filled into a resin dish, compacted, and molded to obtain a powder foundation.

[0033] (Evaluation method 1: Smoothness during application) Five cosmetics experts in their 20s to 40s were asked to use the powder foundations of the above examples and comparative examples. They were given scores for smoothness upon application according to the following evaluation criteria, and the average score for each powder foundation was calculated and judged according to the following criteria. <Evaluation Criteria> [Smoothness during application] [Rating] Excellent: 5 Good :4 Normal: 3 Slightly poor: 2 Bad :1 <Judgment criteria> [Average score] [Judgment] 4.5 or higher: ◎ 3.5 or higher and less than 4.5: ○ 2 or more but less than 3.5: △ Less than 2: ×

[0034] (Evaluation Method 2; Finished Product) Five cosmetics experts in their 20s to 40s were asked to use the powder foundations described in the above examples and comparisons. They were then asked to rate the natural shine and transparency of the finish according to the following evaluation criteria. The average score for each powder foundation was calculated and judged according to the following criteria. <Evaluation Criteria> [Finish after application (natural shine, transparency)] [Rating] Excellent: 5 Good :4 Normal: 3 Slightly poor: 2 Bad :1 <Judgment criteria> [Average score] [Judgment] 4.5 or higher: ◎ 3.5 or higher and less than 4.5: ○ 2 or more but less than 3.5: △ Less than 2: ×

[0035] (Evaluation method 3; Impact resistance) Five samples each of the powder foundations from the above examples and comparative examples were dropped horizontally from a height of 50 cm onto a polyacetal board. This was repeated until cracks or breaks occurred, and the average number of drops before cracks or breaks occurred was taken for all five samples. The results were then evaluated according to the following criteria. <Judgment criteria> ◎: 5.0 times or more ○: 2.0 or more, less than 5.0 times △: 1.0 or more but less than 2.0 times ×: Less than 1.0 times

[0036] As is clear from the results in Table 1, the powder foundations of Examples 1 to 19 of the present invention were excellent in all aspects, including smoothness during application, natural shine and transparency, and impact resistance. In contrast, Comparative Examples 1 and 2, which contained only one of component (A) or (B), and Comparative Examples 3 to 6, which used titanium dioxide-coated mica with an average particle size different from that of components (A) and (B), were particularly insufficient in terms of natural shine and transparency. Comparative Example 7, which did not contain component (C), had insufficient smoothness and natural shine and transparency, and Comparative Example 8, which did not contain component (D), had insufficient smoothness and impact resistance.

[0037] (Example 20) Pressed powder (face powder) Component Content (%) (1) Titanium oxide coated mica (average particle size 52 μm) *10 1.0 (2) Titanium oxide coated glass flakes (average particle size 20 μm) *11 1.5 (3) Amodimethicone-treated mica *12 10.0 (4) Sucrose polystearate-treated calcium carbonate *9 3.0 (5) Dimethicone-treated titanium dioxide 5.0 (6) Dimethicone-treated silica 5.0 (7) Dimethicone-treated talc remaining amount (8) Dimethicone-treated iron oxide, appropriate amount (9) Hexyldecyl isostearate 2.0 (10) Ethylhexyl Methoxycinnamate 3.0 (11) Dimethicone 2.0 Total 100.0 *10: Timica Extra Large Sparkle 110S (manufactured by DIC Corporation) *11: Microglass Metashine MT1020RS (manufactured by Nippon Sheet Glass Co., Ltd.) *12: *6 1% surface-treated product (Manufacturing method) A: Mix oil components 9-11 and heat to dissolve. B: Mix powder ingredients 1-8 uniformly. C:A is added to B and uniformly dispersed, then pulverized to obtain a cosmetic base. D:C is filled into a metal dish and compacted to obtain pressed powder.

[0038] Example 20 was a cosmetic product that performed well in all aspects, including natural shine and transparency, smooth application, and impact resistance. [Industrial applicability]

[0039] The solid powder cosmetic composition of the present invention can have excellent usability, natural gloss, transparency, and impact resistance even without containing plastic microbeads.

Claims

1. A solid powder cosmetic containing the following ingredients (A) to (D). (A) Bright powder having an average particle size of 45 μm or more and 60 μm or less (B) Shiny powder having an average particle size of 15 μm or more and 25 μm or less (C) Mica (D) Calcium carbonate

2. The solid powder cosmetic composition according to claim 1, wherein component (D) is surface-treated with sucrose polystearate.

3. The solid powder cosmetic composition according to claim 1 or 2, wherein component (C) is surface-treated with magnesium stearate.

4. A solid powder cosmetic composition according to claim 1 or 2, which does not contain plastic microbeads.

5. The solid powder cosmetic composition according to claim 1 or 2, which is a face powder or foundation.

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