Skin film-forming composition

Abstract

The present invention provides a skin film-forming composition having excellent rub resistance. The skin film-forming composition according to the present invention contains the following components (A) and (B): (A) a silicone film-forming agent; (B) fibers having an average fiber diameter of 0.1 μm or more and 7 μm or less, and a content of 0.05 mass% or more and 2 mass% or less relative to the total amount of the film-forming composition; and the mass ratio (B) / (A) of component (B) to component (A) is 0.05 or more and 1 or less.

Description

Technical Field

[0001] This invention relates to a skin coating-forming composition capable of forming a good cosmetic coating on the skin surface. Background Technology

[0002] The technology of incorporating fibers into cosmetics is known and is widely used in products such as mascara. Additionally, a composition is reported that aims to modify keratinous substances such as skin, containing fibers and copolymers containing carboxylic acid ester groups and polydimethylsiloxane in a physiologically permissible medium (Patent Document 1). Furthermore, technologies for incorporating fibers into cosmetics to reduce the irritation of cosmetics containing irritating ingredients are reported (Patent Document 2); cosmetics containing fibers and anti-aging active agents to conceal skin imperfections and address signs of skin aging are also reported (Patent Document 3). Furthermore, reports indicate that fiber dispersions containing short fibers with a diameter of 1–500 nm and a total Pa ratio of 60% or more are formulated to obtain solutions, emulsions, and gels with excellent uniform dispersibility and long-term dispersion stability (Patent Document 4). Additionally, cosmetics containing short fibers cut from ultrafine synthetic fibers with a diameter of approximately 2 μm into short fibers with a length of 5–50 μm are reported (Patent Document 5).

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2002-193746

[0004] [Patent Document 2] Japanese Patent Application Publication No. 2002-293718

[0005] [Patent Document 3] Japanese Patent Application Publication No. 2002-293731

[0006] [Patent Document 4] Japanese Patent Application Publication No. 2005-320506

[0007] [Patent Document 5] Japanese Patent Application Publication No. 2001-64153 Summary of the Invention

[0008] The skin coating composition related to this invention contains the following components (A) and (B):

[0009] (A) Silicone coating forming agents;

[0010] (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less, and whose proportion relative to the total of the coating forming composition is 0.05% by mass or more and 2% by mass or less;

[0011] The mass ratio of component (B) to component (A) (B) / (A) is 0.05 or more and 1 or less.

[0012] In addition, the present invention relates to a method for manufacturing a coating on the skin surface, comprising the step of applying the above-mentioned skin coating forming composition to the skin.

[0013] In addition, the present invention also relates to a coating containing the above-described skin coating forming composition. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the structure of the electrostatic spraying device used to form component (B) fibers. Detailed Implementation

[0015] The fibers used in Patent Documents 1-3 have a diameter of 0.9 dtex (=10.7 μm), which is relatively coarse and cannot form a network, leading to durability issues with the cosmetic coating. Furthermore, the fibers used in Patent Document 4 are very long with an extremely high aspect ratio, making it impossible to form a highly durable coating. Additionally, the cosmetic described in Patent Document 5 also fails to form a stable coating on the skin.

[0016] Furthermore, according to the inventors' research, the coatings obtained from the cosmetics described in Patent Documents 1 to 5 are less resistant to physical friction, which presents a technical problem regarding abrasion resistance.

[0017] Therefore, the present invention provides a skin coating forming composition that can form a stable coating on the skin and the obtained coating has excellent abrasion resistance.

[0018] Therefore, the inventors conducted various studies to solve the above-mentioned technical problems and found that by mixing extremely fine short fibers with a specified fiber diameter and a silicone film-forming agent in a specified ratio, a film-forming composition for skin can be obtained, which can form a stable film on the skin and significantly improve the abrasion resistance of the obtained film. When used as a cosmetic film, it can also improve the coverage caused by the cosmetic film.

[0019] When the skin coating forming composition of the present invention is used, a stable coating can be formed on the skin, and the abrasion resistance of the obtained coating is significantly improved. When used as a cosmetic coating, it can also improve the coverage caused by the cosmetic coating and achieve a bright color with excellent color development.

[0020] The skin coating composition of the present invention contains the following components (A) and (B):

[0021] (A) Silicone coating forming agents;

[0022] (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less, and whose proportion relative to the total of the coating forming composition is 0.05% by mass or more and 2% by mass or less;

[0023] The mass ratio of component (B) to component (A) (B) / (A) is 0.05 or more and 1 or less.

[0024] The silicone film-forming agent of component (A) refers to a component having a silicone structure and capable of forming a film on the skin when applied. Specifically, the silicone film-forming agent is dispersed or dissolved in the film-forming composition. Furthermore, the silicone film-forming agent is preferably dispersed or dissolved in an oil component.

[0025] The so-called "silicone structure" in this invention refers to the structure shown in the following general formula (I).

[0026]

[0027] In general formula (I), R 1 Each group independently represents a hydrocarbon group with 1 or more carbon atoms and less than 12; p is an integer greater than or equal to 1. From the viewpoint of forming a highly rub-resistant film on the skin when applied (hereinafter also referred to as "the viewpoint of forming a film with excellent rub resistance"), and from the viewpoint of versatility, R... 1 Preferably, it is an alkyl group having 1 or more and 12 or less carbon atoms, or an aryl group having 6 or more and 12 or less carbon atoms, more preferably an alkyl group or phenyl group having 1 or more and 12 or less carbon atoms, even more preferably an alkyl group having 1 or more and 3 or less carbon atoms, and even more preferably a methyl group.

[0028] The silicone coating agent of component (A) is preferably a polymer having a silicone structure in part of its structure, containing not only D units (R 1 2SiO 2 / 2 The structure can also contain M-units (R-units). 1 3SiO 1 / 2 ) structure, T unit (R 1 SiO 3 / 2 ) structure, Q unit (SiO) 4 / 2 )structure.

[0029] When a polymer has a silicone structure in part of its structure, the silicone structure can be present either in the main chain or the side chain of the polymer, preferably in the side chain.

[0030] When a silicone structure exists in the main chain of a polymer, there are no particular restrictions on its bonding morphology. For example, a silicone structure can exist at the end of the polymer main chain, or it can be a copolymer in which the silicone structure is bonded in a block or random manner in the polymer main chain.

[0031] Alternatively, it can be a polymer that has been grafted and modified with a compound having a silicone structure.

[0032] As a specific example of component (A), one or more of the following can be used: silicone-modified pullulan, silicone-containing silicic acid compounds, and silicone dendritic polymers.

[0033] Examples of silicone-modified pullulan include pullulan with a silicone structure in the side chain. Specifically, from the viewpoint of forming a coating with excellent abrasion resistance and from the viewpoint of versatility, silicone-modified pullulan in which at least a portion of the hydrogen atoms of the OH group in the pullulan are replaced by groups represented by the following general formula (1) is preferred.

[0034] -Z 1 -SiX a R 2 3-a (1)

[0035] In the formula, Z 1 It is a single bond or a divalent organic group. R 2 Each of the following independently represents an alkyl group having 1 or more but less than 12 carbon atoms; X is a group represented by formula (i) below. a is an integer of 1 or more but less than 3.

[0036]

[0037] In the formula, R 1 As above, c is an integer greater than 1 and less than 5.

[0038] From the viewpoint of forming a coating with excellent abrasion resistance and from the viewpoint of versatility, X is preferably trimethylsilyloxy, and a is preferably 3.

[0039] In general formula (1), from the viewpoint of forming a coating with excellent abrasion resistance and from the viewpoint of versatility, Z 1 Preferably, it is a divalent organic group, more preferably a divalent group represented by the following general formula (2) or (3), and even more preferably a divalent group represented by the following general formula (3).

[0040]

[0041] In the formula, R 11 It is an alkylene group having 1 or more but less than 10 carbon atoms, such as methylene, ethylene, trimethylene, propylene, butylene, etc. From the viewpoint of forming a coating with excellent abrasion resistance and from the viewpoint of versatility, among these, ethylene, trimethylene, and propylene are preferred, and trimethylene or propylene are more preferred.

[0042] Commercially available silicone-modified pullulan polysaccharides include, for example, TSPL-30-ID (isododecane solution of pullulan polysaccharide tris(trimethylsiloxy)silylpropylcarbamate) and TSPL-30-D5 (cyclopentasiloxane solution of pullulan polysaccharide tris(trimethylsiloxy)silylpropylcarbamate), manufactured by Shin-Etsu Chemical Industry Co., Ltd.

[0043] Examples of silicate compounds containing silicone structures include silicate compounds with silicone structures at the ends, such as trialkylsilaneoxysilicic acid, fluorinated alkylsilaneoxysilicic acid, and phenyl-modified alkylsilaneoxysilicic acid.

[0044] Regarding the alkyl group in trialkylsilyloxysilicic acid, from the viewpoint of forming a coating with excellent abrasion resistance and versatility, it is preferable to have 1 or more and 10 or less carbon atoms, more preferably 1 or more and 4 or less carbon atoms, and even more preferably methyl. Specific examples of trialkylsilyloxysilicic acid include trimethylsilyloxysilicic acid.

[0045] Regarding fluorine-modified alkylsilaneoxysilicic acids, examples include compounds in which at least a portion of the hydrogen atoms of the alkyl group in a trialkylsilaneoxysilicic acid are replaced by fluorine atoms. Specific examples include trifluoropropyldimethylsilaneoxysilicic acid, trifluoropropyldimethyl / trimethylsilaneoxysilicic acid, etc.

[0046] Examples of phenyl-modified alkylsilaneoxysilicic acids include phenylpropyl dimethylsilaneoxysilicic acid and phenylpropyl dimethyl / trimethylsilaneoxysilicic acid.

[0047] In the silica compounds containing a silicone structure, from the viewpoint of forming a coating with excellent abrasion resistance, one or more selected from trialkylsiloxysilicic acid and fluorinated alkylsiloxysilicic acid are preferred.

[0048] Commercially available silicone compounds containing a silicone structure include, for example, trimethylsilyloxysilicic acid (solution) such as KF-7312J, KF-7312K, KF-7312T, KF-7312L, X-21-5249, X-21-5250, KF-9021, X-21-5595, X-21-5616, KF-9021L, X-21-5249L, and X-21-5250L manufactured by Shin-Etsu Chemical Industry Co., Ltd.; Momentive Performance Materials Japan Ltd. manufactures XS66-B8226 (a cyclopentasiloxane solution of trifluoropropyl dimethyl / trimethylsiloxane); XS66-B8636 (a dimethylsiloxane solution of trifluoropropyl dimethyl / trimethylsiloxane); SilShine151 (phenylpropyl dimethylsiloxane), etc.

[0049] Examples of silicone dendritic polymers include vinyl polymers having a siloxane dendritic polymer structure in the side chain. Specifically, regarding the siloxane dendritic polymer structure, from the viewpoint of forming a coating with excellent abrasion resistance and versatility, groups represented by the following general formula (4) are preferred.

[0050]

[0051] In the formula, R 1 Same as above. Z 2 It is a single bond or a divalent organic group. When X 1 It is the group shown in the following general formula (5) when i = 1, where i represents the hierarchy of the group and is an integer greater than 1 and less than 10.

[0052]

[0053] In the formula, R 1 Same as above; R 12 It is an alkyl group having 1 or more but less than 10 carbon atoms. Z 3 It is an alkylene group with 2 or more but less than 10 carbon atoms. X i+1 It is a hydrogen atom, an alkyl group with 1 or more carbon atoms and less than 10 carbon atoms, an aryl group, or a group represented by general formula (5); i is an integer of 0 or more and less than 3.

[0054] In general formula (4), Z 2 It is a single bond or a divalent organic group. From a general point of view, it is preferred to be a divalent organic group, and more preferably a divalent group as shown in the following general formula (6), (7) or (8).

[0055]

[0056] In the formula, R 13 It is an alkylene group with 1 or more but less than 10 carbon atoms, such as methylene, ethylene, trimethylene, propylene, butylene, etc. From a general point of view, ethylene, trimethylene, or propylene is preferred. 14 It is an alkyl group with 1 or more but less than 10 carbon atoms, such as methyl, ethyl, propyl, and butyl. From the same point of view, methyl is preferred. 15 It is an alkylene group with 1 or more carbon atoms and less than 10 carbon atoms. Examples include methylene, ethylene, trimethylene, propylene, butylene, etc. From the same point of view, ethylene is preferred. q is an integer between 0 and 4, and r is 0 or 1.

[0057] Examples of vinyl polymers (hereinafter also referred to as "vinyl polymers") having a siloxane dendritic polymer structure in the side chain include polymers having repeating units derived from monomers represented by the following general formula (9).

[0058]

[0059] In the formula, R 1 and X 1 Same as above. Y is a group containing a vinyl bond, such as: vinyl, 2-acryloyloxyethyl, 3-acryloyloxypropyl, 2-methacryloyloxyethyl, 3-methacryloyloxypropyl, 4-vinylphenyl, 3-vinylphenyl, 4-(2-propenyl)phenyl, 3-(2-propenyl)phenyl, 2-(4-vinylphenyl)ethyl, 2-(3-vinylphenyl)ethyl, allyl, 5-hexenyl. Of these, from a general point of view, (meth)acryloyl or vinyl is preferred, and (meth)acryloyl is more preferred.

[0060] The vinyl polymer may further contain repeating units derived from vinyl monomers other than those shown in the general formula (9) above. The vinyl monomer is a monomer having a group containing an ethylene bond and other than those shown in the general formula (9) above, such as (meth)acrylic acid, alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate, aromatic ring-containing (meth)acrylate, vinyl fatty acid esters, (meth)acrylamide, styrene or derivatives thereof, etc., and one or more of these may be used. From a generality point of view, (meth)acrylic acid monomers such as alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate, and aromatic ring-containing (meth)acrylate are preferred.

[0061] Regarding the content of repeating units derived from monomers represented by the above general formula (19) in the vinyl polymer, from the viewpoint of forming a coating with excellent abrasion resistance, it is preferably 0.1% by mass or more, more preferably 10% by mass or more, and more preferably 20% by mass or more, relative to the total repeating units in the vinyl polymer. Furthermore, the upper limit is 100% by mass.

[0062] The vinyl polymers described above are more preferably acrylic polymers. That is, the preferred silicone dendritic polymers are acrylic polymers with a siloxane dendritic polymeric structure in the side chains (hereinafter also referred to as "acrylic silicone dendritic polymers"). Acrylic silicone dendritic polymers are polymers having repeating units derived from monomers in which Y is a (meth)acryloyl group in the above general formula (9), and may further contain repeating units derived from (meth)acrylic monomers other than those shown in general formula (9).

[0063] Commercially available silicone dendritic polymers include, for example, Toray Dow Corning's FA 4001CMSilicone Acrylate (a cyclopentasiloxane solution of acrylate-polytrimethylsiloxane methacrylate copolymer) and FA 4002IDSile Acrylate (an isododecane solution of acrylate-polytrimethylsiloxane methacrylate copolymer), among other silicone dendritic polymers.

[0064] As component (A), from the viewpoint of forming a coating with excellent abrasion resistance, the polymer is more preferably selected from one or more of silicone-modified pullulan, trimethylsiloxysilicic acid, trifluoropropyldimethyl / trimethylsiloxysilicic acid, and acrylic silicone dendritic polymers, and more preferably selected from one or more of trimethylsiloxysilicic acid and acrylic silicone dendritic polymers.

[0065] Regarding component (A), one type may be used alone, or two or more types may be used in combination. Regarding the content of component (A), from the viewpoint of forming a film with excellent wipeability, it is preferably 0.01% by mass or more in the total film-forming composition, more preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. Furthermore, it is preferably 10% by mass or less, more preferably 9% by mass or less, and even more preferably 8% by mass or less. Additionally, the content of the solid component of component (A) in the total composition is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 9% by mass or less, more preferably 0.5% by mass or more and 8% by mass or less, and even more preferably 1% by mass or more and 8% by mass or less.

[0066] Component (B) is a fiber with an average fiber diameter of 0.1 μm or more and 7 μm or less. Component (B) forms a network in the resulting coating, which imparts durability to the coating. When combined with component (A), it imparts excellent abrasion resistance to the resulting coating, improves hiding power, and enables vibrant colors.

[0067] Component (B) exists in solid form in the skin coating composition, while component (A) is dispersed or dissolved in the coating composition.

[0068] Furthermore, scanning electron microscopy (SEM) can be used to confirm whether a fiber network exists in the coating. A "network" refers to a state in which fibers dispersed in the coating have intersecting points, creating gaps between the fibers, thus allowing the components contained in the coating composition to be retained within these gaps. Preferably, the intersecting points between fibers are, for example, one fiber having two or more intersecting points with two or more other fibers, and these points being interconnected.

[0069] The average fiber diameter generally refers to the cross-sectional diameter of the fiber. Here, when the fiber cross-section is circular, the average fiber diameter refers to the diameter; when the fiber cross-section is elliptical, the average fiber diameter refers to the major axis. Regarding the average fiber diameter used in this invention, from the viewpoint of improving the fiber's conformability to the skin and thus enhancing durability, and from the viewpoint of forming a coating with excellent abrasion resistance, a diameter of 0.1 μm or more and 7 μm or less is preferred.

[0070] From the viewpoint of improving durability and forming a coating with excellent abrasion resistance, a thickness of 0.2 μm or more is preferred, and 0.3 μm or more is more preferred.

[0071] Furthermore, from the viewpoint of improving durability and forming a coating with excellent abrasion resistance, a thickness of 6 μm or less is preferred, 5 μm or less is more preferred, and 4 μm or less is even more preferred.

[0072] The average fiber diameter was determined as follows: Using SEM, the fibers were observed at 2000x or 5000x magnification. One hundred fibers with defects (e.g., fiber clumps, fiber intersections) removed were randomly selected from the two-dimensional image. A straight line orthogonal to the long side of the fiber was drawn, and the fiber diameter was directly read. The average fiber diameter was calculated as the arithmetic mean of these measurements. Because the fibers were dispersed in the coating composition, the coating composition was thinly coated onto the substrate, and measurements were taken using SEM.

[0073] Regarding the fiber length, from the viewpoints of setting a length that is easy to form a network, improving the durability of the formed coating by utilizing the network, and forming a coating with excellent abrasion resistance, the average fiber length is preferably 20 μm or more and 300 μm or less.

[0074] Regarding the average fiber length, from the viewpoint of easy network formation and the ability to form a coating with excellent abrasion resistance, it is more preferably 25 μm or more, more preferably 30 μm or more, and even more preferably 40 μm or more.

[0075] Furthermore, from the viewpoint of suppressing the entanglement or twisting of fibers when coating the composition, and from the viewpoint of forming a coating with excellent abrasion resistance, a thickness of 250 μm or less is more preferred, and 200 μm or less is even more preferred.

[0076] The average fiber length is determined as follows: Using SEM, the fiber length is magnified 250 to 750 times. One hundred fibers with defects (such as fiber blocks or fiber intersections) removed are randomly selected from the two-dimensional image. A straight line is drawn along the long side of the fiber, and the fiber length is directly read. The average fiber length is calculated as the arithmetic mean of these measurements and set as the average fiber length.

[0077] Regarding the aspect ratio (average fiber length / average fiber diameter) of the fibers, from the viewpoint of the durability of the coating caused by forming a uniform network and the viewpoint of forming a coating with excellent abrasion resistance, it is preferably 10 or more and 300 or less.

[0078] From the viewpoint of coating durability and the ability to form a coating with excellent abrasion resistance, a value of 20 or more is preferred, 25 or more is even more preferred, and 27 or more is even more preferred.

[0079] Furthermore, from the viewpoint of coating durability and the ability to form a coating with excellent abrasion resistance, a value of 250 or less is preferred, and a value of 200 or less is even more preferred.

[0080] Regarding the CV value (coefficient of variation) of the fiber length of component (B) fiber, from the viewpoint that the fiber can form a network in the coating, it is preferably 40% or more and 100% or less.

[0081] From the viewpoint of easy network formation and the ability to form a coating with excellent abrasion resistance, a CV value of 42% or more is preferred, and 45% or more is even more preferred.

[0082] Furthermore, from the viewpoint of improving the storage stability of the composition, the CV value is preferably 95% or less, more preferably 90% or less.

[0083] The CV value is calculated by the measured value obtained according to the above fiber length measurement method: (standard deviation of the measured fiber length) / (average fiber length) × 100 [%).

[0084] Regarding the fibers of component (B), from the viewpoints of forming a strong network in the coating, improving the durability of the obtained coating, and forming a coating with excellent abrasion resistance, it is preferable to contain fibers with a fiber length of 40 μm or more, and more preferably fibers with a fiber length of 50 μm or more.

[0085] Furthermore, regarding the fibers of component (B), from the viewpoints of forming a strong network in the coating, improving the durability of the obtained coating, and forming a coating with excellent abrasion resistance, the proportion of fibers with a fiber length of 40 μm or more in the total fiber composition is preferably 5% or more and 100% or less. More preferably, it contains 8% or more and 100% or less of fibers with a length of 40 μm or more. Further, from the viewpoints of improving durability and forming a coating with excellent abrasion resistance, it is more preferably 15% or more and 100% or less.

[0086] The fiber count ratio was determined as follows: based on fiber length, with 20 to 30 fibers appearing in one SEM image, the SEM magnification was adjusted to ×200 to ×750. Under this condition, all fibers in the image were measured, excluding any arbitrary values, for a total of more than 200 fibers.

[0087] Regarding the fiber of component (B), i.e., the fiber of the water-insoluble polymer, it can be manufactured by obtaining fibers from a fiber-forming polymer using various known spinning techniques, followed by a short-fiber treatment. Here, the fiber-forming polymer is a conventional thermoplastic chain polymer or a solvent-soluble chain polymer. A thermoplastic resin is preferred, and more preferably, a resin with a weight-average molecular weight of 1.0 × 10⁻⁶. 4 g / mol or higher and 2.0 × 10 5 Thermoplastic resins with a g / mol or less.

[0088] In fiber-forming polymers, water-insoluble polymers are preferred from the viewpoint of maintaining fiber shape in a coating forming agent. Furthermore, regarding spinning methods, electrospinning (electric field spinning) is preferred from the viewpoint of efficiently obtaining fibers with small diameters; specifically, solution spinning and melt spinning are examples.

[0089] The term "fiber of water-insoluble polymer" refers to a fiber that has the following property: when 1g of fiber is weighed and immersed in 10g of deionized water at 1 atmosphere and 23°C, after 24 hours, more than 0.5g of the immersed fiber does not dissolve.

[0090] Examples of water-insoluble polymers include: fully saponified polyvinyl alcohol (PVA) that can be insoluble after coating formation; partially saponified PVA that can be crosslinked after coating formation by using it in conjunction with a crosslinking agent; oxazoline-modified silicones such as poly(N-propionylethyleneimine) grafted-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer; biodegradable resins such as polyvinyl acetal diethylamino acetate, corn protein (the main component of corn protein), polylactic acid (PLA), polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoic acid; polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate; acrylic resins such as polyacrylonitrile resin and polymethacrylic acid resin; polystyrene resin, polyvinyl butyral resin, polyvinyl acetal resin, polyurethane resin, polyamide resin, polyimide resin, polyamide-imide resin, polypropylene resin, polyethylene resin, and various polypeptides (collagen, gelatin, fibrin, casein, etc.). These water-insoluble polymers can be used alone or in combination of two or more.

[0091] Among these water-insoluble polymers, one or more are preferably selected from fully saponified polyvinyl alcohol that can be insoluble after coating formation, partially saponified polyvinyl alcohol that can be crosslinked after coating formation by use with a crosslinking agent, polymethyl methacrylate resin, other acrylic resins, polyvinyl butyral resin, polyurethane resin, polylactic acid, oxazoline-modified silicone such as poly(N-propionyl ethylimide) grafted-dimethylsiloxane / γ-aminopropyl methylsiloxane copolymer, polyvinyl acetal diethylamino acetate, and corn protein.

[0092] From the viewpoint of easily forming nanofibers, it is more preferable to select one or more of polyvinyl butyral resin, acrylic resin, polypropylene resin, polyester such as polylactic acid, and polyurethane resin.

[0093] As an acrylic resin, a copolymer of octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate is preferred.

[0094] Furthermore, from the viewpoint of reducing environmental impact, it is preferable to use biodegradable resins such as polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoates. In this specification, "biodegradable" refers to a polyester with a biodegradability of 30% or higher as determined by JIS K6953-1.

[0095] Methods for short fiber processing include, for example, cutting, shearing, crushing, pulverizing, disintegrating, or defiberizing, such as: mechanical vortex pulverizers, hammer crushers, and other impact crushers; jet mills and other jet mills; media mills such as ball mills and rod mills; dry pulverizers such as cutting and grinding mills and disc mills; as well as media mills using liquid media, wet mills using media-free pulverizers, and combinations thereof.

[0096] A more preferred method for shortening fibers is as follows: After manufacturing a fiber assembly, such as a nonwoven fabric, composed of intertwined nanofibers, the fiber assembly is cut into appropriate sizes, and then subjected to mechanical vortex pulverizer, cutting pulverizer, disc mill, wet high-speed shear-type medialess pulverizer, or wet high-pressure shear-type medialess pulverizer. The aforementioned fiber assembly, in addition to nonwoven fabric, also includes objects with a specified thickness, such as flocculent material.

[0097] Regarding the content of component (B) in the composition of the present invention, from the viewpoints of the durability of the formed coating, the ease of forming a fiber network, and the ability to form a coating with excellent abrasion resistance, it is 0.05% by mass or more and 2% by mass or less relative to the total amount of the coating forming composition.

[0098] From the viewpoints of coating durability, ease of fiber network formation, and ability to form a coating with excellent abrasion resistance, a content of 0.1% by mass or more is preferred, and 0.2% by mass or more is more preferred.

[0099] Furthermore, from the viewpoint of forming a stable composition, it is preferable to have 1.8% by mass or less, and more preferably 1.6% by mass or less.

[0100] The content of component (B) relative to the total content of the coating-forming composition is determined by the following method. First, fibers that can be identified as water-insoluble polymers are obtained from the fibers contained in the composition according to the definition of water-insoluble polymers described above. Next, the fibers are washed with a solvent insoluble in the fibers and then filtered to obtain only fibers of the water-insoluble polymer. Regarding the solvent, when the resin contained in component (B) is an ester resin such as PLA, the solvent is preferably ethanol; when the resin is an acrylic resin, the solvent is preferably water. The mass of the obtained water-insoluble polymer fibers is measured and determined by calculating the mass ratio of the fiber to the total mass of the composition before washing, i.e., the coating-forming composition, i.e., (mass of component (B) after washing) / (mass of the composition before washing) × 100 (%).

[0101] Regarding the mass ratio (B) / (A) of component (B) to component (A) in the composition of the present invention, from the viewpoints of coating durability, ease of forming a fiber network, and the ability to form a coating with excellent abrasion resistance, it is preferably 0.05 or more and 1 or less.

[0102] From the viewpoint of the durability of the coating and the ability to form a coating with excellent abrasion resistance, the mass ratio (B) / (A) is preferably 0.06 or more, more preferably 0.08 or more, and even more preferably 0.1 or more.

[0103] From the viewpoints of coating durability, ease of fiber network formation, and ability to form a coating with excellent abrasion resistance, the mass ratio (B) / (A) is preferably 0.9 or less. Furthermore, from the viewpoint of forming a coating with excellent abrasion resistance, it is more preferably 0.8 or less, and even more preferably 0.7 or less.

[0104] In the composition of the present invention, in order to enable the fibers to form a network in the formed coating and to ensure good durability of the coating, the average fiber diameter is [specified]. 2 / Fiber content (μm) 2 The fiber content (%) is preferably in the range of 0.005 or more and 40 or less. "Fiber content" refers to the percentage of fiber mass in the coating composition.

[0105] From the viewpoint of being able to form a sufficiently uniform fiber network, this value is preferably 0.02 or more, more preferably 0.03 or more, and more preferably 0.05 or more.

[0106] Furthermore, considering the actual amount to be allocated, this value is preferably 35 or less, more preferably 30 or less, and even more preferably 25 or less.

[0107] This value is the average fiber diameter. 2 / Fiber content (μm) 2 / mass%) is an indicator of the cumulative length of fibers contained in the composition. The larger the value, the shorter the cumulative length.

[0108] In order to facilitate the formation of a network of component (B) fibers in the film formed on the skin when the composition of the present invention is applied to the skin, the composition of the present invention preferably contains a liquid substance (component (C)) selected from water and non-volatile oils that are liquid at 20°C as a dispersion medium for component (B).

[0109] Therefore, in the coating forming composition of the present invention, since component (B) is dispersed or dissolved in component (C), a network of fibers of component (B) can be easily formed.

[0110] Component (C) is a liquid substance selected from water and non-volatile oils that are liquid at 20°C. Examples of component (C) include water and one or more oils selected from ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorinated oils, and non-volatile silicone oils. In this invention, it is preferable to use one of these alone or in combination of two or more. The volatile oil in this invention is an oil whose vapor pressure at 20°C is 0.01 kPa or more and 106.66 kPa or less; on the other hand, the non-volatile oil is an oil other than the aforementioned volatile oils that is liquid at 20°C.

[0111] Regarding the aforementioned ester oils, one or more of the following can be used: esters composed of straight-chain or branched fatty acids and straight-chain or branched alcohols or polyols, or triglyceride fatty acid esters (triglycerides).

[0112] Specifically, the following can be used: isopropyl myristate, cetyl caprylate, octyl dodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyl octanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, isocetyl isostearate, isononyl isononanoate, isotriadecyl isononanoate, cholesterol 12-hydroxystearate, di(2-ethylhexanoate)ethyl... Diol esters, dipentaerythritol fatty acid esters, alkyl monoisostearate diol esters, neopentyl glycol didecanoate, diisostearate malate, glyceryl di(2-heptylundecanoate), trimethylolpropane tri(2-ethylhexanoate), trimethylolpropane triisostearate, pentaerythritol tetra(2-ethylhexanoate), triglyceryl tri(2-ethylhexanoate), trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, naphthalenedicarboxylic acid Diethylhexyl ester, alkyl benzoate (carbon number 12-15), cetearyl isononanoate, tri(caprylic / capric) glyceryl ester, butylene glycol (dicaprylic / capric) glyceryl ester, trilauric acid glyceryl ester, trimyristate glyceryl ester, tripalmitate glyceryl ester, triisostearate glyceryl ester, tri(2-heptylundecanoic acid) glyceryl ester, trisanhexanoic acid glyceryl ester, tricocoyl fatty acid glyceryl ester, castor oil fatty acid methyl ester, oleic acid ester, palmitic-2-heptylundecanoic acid ester, hexyl One or more of the following: diisobutyl diacidate, N-lauroyl-L-glutamic acid-2-octyldodecanoate, di-2-heptylundecanoate adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di-2-ethylhexyl succinate, triethyl citrate, ethylhexyl p-methoxycinnamate, and bis(trimethylacetic acid)tripropylene glycol ester.

[0113] Among these, considering the durability of the resulting coating, the ease of forming a fiber network, and the ability to form a coating with excellent abrasion resistance, it is preferable to contain a coating selected from octyl dodecyl myristate, myristyl myristate, isocetyl stearate, isocetyl isostearate, isocetyl isononanoate, diisobutyl adipate, di-2-ethylhexyl sebacate, isopropyl myristate, isopropyl palmitate, and diisostearyl malate. The ester, neopentyl glycol didecanoate, isononyl isononanoate, isotriacontaneol isonononanoate, triglycerides (caprylic / capric acid), isopropyl myristate, and ethylhexyl p-methoxycinnamate; more preferably, it contains one or more of the following: diisostearyl malate, neopentyl glycol didecanoate, isonononyl isonononanoate, isotriacontaneol isonononanoate, triglycerides (caprylic / capric acid), isopropyl myristate, and ethylhexyl p-methoxycinnamate.

[0114] Examples of the aforementioned ether oils include alkyl-1,3-dimethyl butyl ether such as cetyl dimethyl butyl ether; ethylene glycol dioctyl ether, glycerol monooleyl ether, dioctyl ether, etc. One or more of these can be used.

[0115] More preferably, cetyl-1,3-dimethylbutyl ether is used as the aforementioned ether oil.

[0116] Examples of hydrocarbon oils mentioned above include liquid alkanes, squalane, squalene, polyisobutylene (pentamelis and above), and liquid isoalkanes, which are liquid at 20°C.

[0117] Regarding higher alcohols, examples include higher alcohols with 12 to 20 carbon atoms, such as lauryl alcohol, isostearyl alcohol, oleyl alcohol, octyldodecyl alcohol, etc. One or more of these can be selected for use.

[0118] Alternatively, animal and vegetable oils containing the aforementioned esters and hydrocarbons can be used. Examples of animal and vegetable oils include: olive oil, jojoba oil, macadamia nut oil, meadowfoam seed oil, castor oil, safflower oil, sunflower oil, avocado oil, canola seed oil, almond oil, rice germ oil, and rice bran oil.

[0119] Examples of silicone oils include: dimethyl polysiloxane (5 s or more), polyether-modified silicone, amino-modified silicone, carboxyl-modified silicone, methylphenyl polysiloxane, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic polysiloxane, and alkyl-modified silicone. Of these silicone oils, dimethyl polysiloxane (5 s or more) is preferred.

[0120] Examples of fluorinated oils include: perfluorodecahydronaphthalene, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and perfluoropolyether.

[0121] Regarding the content of component (C) in the composition of the present invention, from the viewpoint of the dispersibility of component (B) and the durability of the formed coating, and taking into account the practical amount to be prepared, it is preferably 5% by mass or more, more preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more.

[0122] In addition, considering the actual amount to be mixed, it is preferred to be 98% by mass or less, more preferably 90% by mass or less, more preferably 70% by mass or less, and even more preferably 50% by mass or less.

[0123] Regarding the content and skeletal structure of component (C), the molecular structure is determined and confirmed using known techniques such as NMR (nuclear magnetic resonance), chromatography, IR analysis, or a combination thereof. Furthermore, regarding the content of component (C), the intensity of the measured values, for example representing the aforementioned skeletal structure, can be measured using the aforementioned methods to confirm its content.

[0124] Furthermore, regarding the content of water (C1) in component (C) in the coating forming composition, from the viewpoints of coating durability, ease of fiber network formation, and ability to form a coating with excellent abrasion resistance, it is preferably 1% by mass or more, more preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. In addition, it is preferably 98% by mass or less, more preferably 90% by mass or less, more preferably 70% by mass or less, and even more preferably 50% by mass or less.

[0125] Furthermore, regarding the mass ratio (C1) / (C) of component (C1) to component (C), from the viewpoints of the durability of the formed coating, the ease of forming a fiber network, and the ability to form a coating with excellent abrasion resistance, it is preferably 0.5 or more, more preferably 0.6 or more, more preferably 0.7 or more, and even more preferably 0.8 or more. In addition, it is preferably 0.96 or less, more preferably 0.94 or less, more preferably 0.92 or less, and even more preferably 0.90 or less.

[0126] From the viewpoint that the coating-forming composition for skin of the present invention can obtain excellent cosmetic effects from the coating formed on the skin, in addition to containing the above-mentioned components, that is, to improve the coverage caused by the cosmetic coating and to achieve a bright color with excellent color development, it is preferable to contain powder (component (D)) as a solid other than component (B).

[0127] The powder of component (D) is an ingredient that enables the film formed on the skin by applying the film-forming composition of the present invention to produce various cosmetic effects. When used in conjunction with the above-mentioned components (A) and (B), these powders (D) can significantly improve the coverage and achieve a bright color with excellent color payoff compared to the use in ordinary powder-containing cosmetics or in conjunction with existing fibers with larger fiber diameters.

[0128] The powder used as component (D) can be any cosmetic powder without particular limitations; coloring pigments and extender pigments can be used. However, from the viewpoint of obtaining excellent cosmetic effects, it is preferable to contain coloring pigments. Here, the coloring pigments (D1) include inorganic colored pigments, inorganic white pigments, organic coloring pigments, organic pigments, and also pearlescent pigments (glossy powders).

[0129] Specifically, examples of inorganic coloring pigments contained in the compositions of the present invention include: inorganic colored pigments such as iron oxide red, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine, Prussian blue titanium oxide, black titanium oxide, titanium-titanium oxide sintered products, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, cobalt titanate, etc.; and inorganic white pigments such as titanium oxide, zinc oxide, calamine, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, and composites thereof. One or more of these may be used.

[0130] Among these, preferably one or more selected from iron oxide, titanium oxide and zinc oxide, more preferably one or more selected from titanium oxide, zinc oxide, iron oxide red, yellow iron oxide and black iron oxide.

[0131] Examples of organic coloring pigments and organic dyes include: Red No. 3, Red No. 102, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404, etc., organic tar pigments; β-carotene, caramel, capsicum pigment, etc. Additionally, examples include pigments coated with polymers such as cellulose and polymethyl methacrylate.

[0132] Examples of pearlescent pigments (glossy powders) include: fish scale foil, titanium dioxide-coated mica (mica titanium), bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, titanium dioxide-coated talc, titanium dioxide-coated colored mica, titanium dioxide-iron oxide-coated mica, microparticle titanium dioxide-coated mica titanium, microparticle zinc oxide-coated mica titanium, organic pigment-treated mica titanium, low-order titanium dioxide-coated mica, titanium dioxide-coated synthetic mica, titanium dioxide-coated plate-shaped silica, hollow plate-shaped titanium dioxide, iron oxide-coated mica, plate-shaped iron oxide (MIO), aluminum fragments, stainless steel fragments, titanium dioxide-coated plate-shaped alumina, glass fragments, titanium dioxide-coated glass fragments, pearl shells, gold foil, gold vapor-deposited resin films, metal vapor-deposited resin films, etc. One or more of these can be used.

[0133] Examples of pigments that can be categorized as extension pigments include inorganic and organic pigments.

[0134] Examples of inorganic extender pigments include: barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate salts, hydroxyapatite, vermiculite, clay, bentonite, microcrystalline kaolin (Montmorillonite), lithium bentonite, smectite, zeolite, ceramic powder, calcium phosphite, alumina, silicon dioxide, aluminum hydroxide, boron nitride, synthetic mica, synthetic sericite, metal soaps, and barium sulfate-treated mica. One or more of these can be used.

[0135] Examples of organic extender pigments include: silicone rubber powder, silicone resin-coated silicone rubber powder, polymethylsilsesquioxane, polyamide powder, nylon powder, polyester powder, polypropylene powder, polystyrene powder, polyurethane powder, vinyl resin powder, urea resin powder, phenolic resin powder, fluororesin powder, silicone resin powder, acrylic resin powder, melamine resin powder, polycarbonate resin, divinylbenzene-styrene copolymer, silk powder, wool powder, cellulose powder, long-chain alkyl phosphate metal salts, N-mono-long-chain alkyl acyl basic amino acids, and their complexes. One or more of these can be used.

[0136] Alternatively, examples could be given such as composite powders of the aforementioned inorganic powders and organic powders.

[0137] The particle size of the powder is preferably 0.01 μm or more and 500 μm or less, more preferably 0.02 μm or more and 100 μm or less, more preferably 0.03 μm or more and 10 μm or less, and even more preferably 0.03 μm or more and 2 μm or less.

[0138] Regarding the shape of the powder, examples include spherical, plate-like, granular, and amorphous shapes. Here, "plate-like" refers to a shape with an aspect ratio (average length / average thickness) preferably less than 20, more preferably less than 15, and even more preferably less than 10.

[0139] The powders mentioned above can also be used after undergoing hydrophobic treatment, or products obtained by using one or more of these powders after hydrophobic treatment. As for hydrophobic treatment, there are no particular restrictions as long as it is performed on conventional cosmetic powders. Surface treatment agents such as silicone compounds, alkylsilanes, metal soaps, amino acid compounds, lecithin, organotitanates, fluorine compounds, acrylic resins, methacrylic resins, and urethane resins can be used for dry treatment, wet treatment, etc.

[0140] As a hydrophobic treatment, preferred treatments include: silicone compound treatments such as dimethylpolysiloxane, methylhydropolysiloxane, cyclic silicone, and single- or double-terminated trialkoxy-modified organopolysiloxane; alkylsilane treatments such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octanoyltrimethoxysilane, and octanoyltriethoxysilane; metal soap treatments such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, and their derivatives; organotitanate treatments such as lecithin treatment and isopropyl triisostearate titanium treatment; fluorine compound treatments such as perfluoroalkylalkoxysilane, fluorinated silicone, perfluoropolyether, and perfluoroalkyl phosphate; and surface treatments such as acrylic resin treatment, methacrylic resin treatment, and urethane resin treatment. More preferably, surface treatments are products that have undergone surface treatment using silicone compounds, alkylsilanes, or amino acid compounds.

[0141] Regarding the content of component (D) powder in the skin coating forming composition of the present invention, from the viewpoints of improving coating durability, improving coverage, and achieving excellent color development and vibrant color, it is preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 5% by mass or more. Furthermore, from the same viewpoint, it is preferably 94% by mass or less, more preferably 60% by mass or less, even more preferably 50% by mass or less, and even more preferably 40% by mass or less.

[0142] In component (D) powder, as described above, it is preferable to contain (D1) coloring pigment. From the viewpoint of obtaining excellent cosmetic effects, it is preferable that the coloring pigment in the skin coating forming composition of the present invention contains 0.1% by mass or more and 60% by mass or less. More preferably, it contains 0.3% by mass or more, more preferably 1% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less.

[0143] Furthermore, the mass ratio (D1) / (D) of the content of coloring pigment (D1) relative to component (D) is preferably 0.3 or more, more preferably 0.4 or more, and even more preferably 0.5 or more. Also, from the same viewpoint, it is preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.

[0144] The composition of the present invention may further contain, in addition to component (C), oils, volatile components, surfactants, polyols that are liquid at 20°C, preservatives, humectants, ultraviolet absorbers, water-soluble polymers, amino acids, pigments, etc.

[0145] Regarding oils other than ingredient (C), as long as they are solid or semi-solid at 20°C and are commonly used ingredients in cosmetics, there are no special restrictions. Examples include: mineral waxes such as ozokerite and ceresin; petroleum waxes such as alkanes and microcrystalline waxes; synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon waxes; plant waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, and highly hydrogenated jojoba oil; animal waxes such as beeswax, snowwax, and cetacean wax; and synthetic waxes such as silicone wax and synthetic beeswax, etc.

[0146] Examples of volatile components include alcohols, ketones, volatile silicone oils, and volatile hydrocarbon oils, with one or more preferably selected from alcohols, volatile silicones, and volatile hydrocarbon oils. This volatile component is a substance that is volatile in a liquid state. The vapor pressure of this volatile substance is 0.01 kPa or more and 106.66 kPa or less at 20°C.

[0147] Regarding volatile alcohols, it is preferable to use, for example, mono-chain aliphatic alcohols, mono-cyclic aliphatic alcohols, and mono-aromatic alcohols. Examples of mono-chain aliphatic alcohols include C1-C6 chain alcohols; examples of mono-cyclic alcohols include C4-C6 cyclic alcohols; and examples of mono-aromatic alcohols include benzyl alcohol and phenylethanol. Specific examples of these include ethanol, isopropanol, butanol, phenylethanol, n-propanol, and n-pentanol. From a user experience perspective, ethanol is preferred. One or more of these alcohols can be used.

[0148] Examples of volatile silicone oils include: linear dimethyl polysiloxanes such as hexamethyldisiloxane (dimethylpolysiloxane (0.65cs)), octamethyltrisiloxane (dimethylpolysiloxane (1cs)), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methylpolytrimethylsiloxane, tris(trimethylsilyl)methylsilane, and tetra(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane.

[0149] Among these, from the viewpoint of excellent user experience and makeup setting, it is preferable to contain linear dimethyl polysiloxane or branched siloxane, more preferably to contain one or more of hexamethyldisiloxane (dimethyl polysiloxane (0.65cs)), octamethyltrisiloxane (dimethyl polysiloxane (1cs)), dimethyl polysiloxane (1.5cs), dimethyl polysiloxane (2cs), and methyl polytrimethylsiloxane, more preferably to contain at least one or more of hexamethyldisiloxane (dimethyl polysiloxane (0.65cs)), octamethyltrisiloxane (dimethyl polysiloxane (1cs)), and methyl polytrimethylsiloxane, and even more preferably to contain at least one or more of hexamethyldisiloxane (dimethyl polysiloxane (0.65cs)) and octamethyltrisiloxane (dimethyl polysiloxane (1cs)).

[0150] Regarding volatile hydrocarbon oils, examples include: alkane oils such as n-decane, n-undecane, and n-dodecane; isoalkane oils such as isodecane, isododecane, and hydrogenated polyisobutylene; and cyclic alkane oils such as cyclodecane and cyclododecane. Among these, from the viewpoint of superior user experience and suppression of uneven makeup setting, isoalkane oils are preferred, more preferably isoalkane oils with 8 to 16 carbon atoms, even more preferably isoalkane oils with 10 to 16 carbon atoms, and even more preferably contain at least isododecane.

[0151] From the viewpoint of excellent user experience and makeup setting properties, the volatile oil is preferably composed of one or more of the following: isododecane and dimethylpolysiloxane with a kinematic viscosity of 2 cSt or less at 25°C. Furthermore, this kinematic viscosity can be measured using, for example, an Ubbelohde viscometer.

[0152] Regarding the content of volatile components in the composition of the present invention, from the viewpoints of improving the durability of the coating, improving the hiding power, and achieving excellent color development and bright color, it is preferably 1% by mass or more, more preferably 10% by mass or more, more preferably 25% by mass or more, and preferably 60% by mass or less, more preferably 50% by mass or less, and more preferably 45% by mass or less, relative to the total content of the coating-forming composition.

[0153] Regarding surfactants, examples include nonionic surfactants, anionic surfactants, and cationic surfactants, with nonionic surfactants being preferred. Examples include: polyoxyethylene-methylpolysiloxane copolymers, poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers, cross-linked polyether-modified silicones, cross-linked alkyl polyether-modified silicones, cetyl dimethylsiloxane copolymer polyols, sorbitan monooleate, glyceryl stearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ethers, sorbitan sesquioleate, and diglyceryl monooleate. These surfactants can be used individually or in combination of two or more.

[0154] Regarding the surfactant content in the composition of the present invention, from the viewpoints of improving the durability of the coating, improving the hiding power, and achieving excellent color development and bright color, it is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, and more preferably 3% by mass or less.

[0155] Examples of polyols that are liquid at 20°C include: alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycol, and polypropylene glycol with a weight-average molecular weight of less than 2000 g / mol; and glycerols such as glycerol, diglycerol, and triglycerol.

[0156] Among these, ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol with a weight-average molecular weight of less than 2000 g / mol, glycerol, and diglycerol are preferred, propylene glycol, 1,3-butanediol, and glycerol are more preferred, and propylene glycol and 1,3-butanediol are even more preferred.

[0157] The skin-coating composition of the present invention can be in the form of, for example, an oil-based cosmetic or an emulsified cosmetic. Specifically, examples include: oil-based cosmetics, water-in-oil emulsified cosmetics, and oil-in-water emulsified cosmetics. Emulsified cosmetics are preferred, and water-in-oil emulsified cosmetics are more preferred. The composition of the present invention can be manufactured by heating and mixing the above-mentioned components as needed using conventional methods.

[0158] Furthermore, the skin coating composition of the present invention can be used as, for example, makeup products such as foundation, powder, concealer, blush, eyeshadow, mascara, eyeliner, eyebrow pencil, protective film agent, and lipstick; UV protection cosmetics such as sunscreen lotion and sunscreen cream; skin care cosmetics such as lotion, emulsion, cream, serum, and mask, etc., preferably as makeup products and UV protection cosmetics.

[0159] The composition of this invention is a skin-coating composition that, when applied to the skin, forms a uniform coating on the skin surface. Within this coating, a fiber network is formed, and component (A) strengthens this network, resulting in a coating with excellent durability and significantly improved abrasion resistance. When used as a cosmetic coating, it also enhances the coverage and achieves vibrant colors with excellent color payoff.

[0160] When the composition of the present invention is applied to the skin, a cosmetic film with excellent durability can be formed on the skin surface. Examples of methods for applying the composition to the skin include: applying with fingers, applying with a spray bottle, applying with a makeup roller or sponge, or applying a stick-shaped solid cosmetic.

[0161] According to the present invention, the coating formed on the skin surface not only has excellent durability, but also significantly improves the abrasion resistance of the obtained coating. Furthermore, when used as a cosmetic coating, it can also improve the coverage caused by the cosmetic coating and achieve a bright color with excellent color development.

[0162] Here, the thickness of the coating varies depending on the amount applied, within the typical application range (applied per unit area of ​​1 mg / cm²). 2 Above and 3mg / cm 2 When the thickness is 0.3 μm or more and 30 μm or less, it is more preferably 0.5 μm or more and 20 μm or less. The thickness is measured using a contact thickness gauge (LETEMATIC VL-50A manufactured by Mitutoyo Co., Ltd.) on the substrate after coating. The substrate used here is a PET substrate.

[0163] Regarding the above embodiments, the present invention further discloses the following compositions, preparation methods, and coatings.

[0164] <1> A skin coating composition comprising the following components (A) and (B):

[0165] (A) Silicone coating forming agents;

[0166] (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less, and whose proportion relative to the total of the coating forming composition is 0.05% by mass or more and 2% by mass or less;

[0167] The mass ratio of component (B) to component (A) (B) / (A) is 0.05 or more and 1 or less.

[0168] <2> Skin coating composition as described in <1>, wherein component (B) is a fiber of a water-insoluble polymer.

[0169] <3> Skin coating composition as described in <1> or <2>, wherein the aspect ratio (average fiber length / average fiber diameter) of component (B) is 10 or more and 300 or less.

[0170] <4> The skin coating composition described in any one of <1> to <3>, wherein the content of component (A) is 0.01% by mass or more and 10% by mass or less relative to the total amount of the coating composition.

[0171] <5> A skin coating composition as described in any of <1> to <4>, wherein it further comprises component (C) a non-volatile liquid substance.

[0172] <6> Skin coating composition as described in any of <1> to <5>, wherein it further contains component (D) powder.

[0173] <7> The skin coating composition described in any one of <1> to <6>, wherein component (A) is selected from one or more of silicone-modified pullulan, silicone-containing silica compounds, and silicone dendritic polymers.

[0174] <8> The skin coating composition described in any one of <1> to <7>, wherein component (A) is more preferably selected from one or more of silicone-modified pullulan, trimethylsiloxysilicic acid, trifluoropropyldimethyl / trimethylsiloxysilicic acid, and silicone dendritic polymers, and more preferably selected from one or more of trimethylsiloxysilicic acid and silicone dendritic polymers.

[0175] <9> The skin coating composition described in any one of <1> to <8>, wherein the solid content of component (A) in the total coating composition is preferably 0.1% by mass or more and 9% by mass or less, more preferably 0.5% by mass or more and 8% by mass or less, and more preferably 1% by mass or more and 8% by mass or less.

[0176] <10> The skin coating composition described in any one of <1> to <9>, wherein the average fiber diameter of component (B) is 0.2 μm or more and 5 μm or less, preferably 0.3 μm or more and 4 μm or less, and more preferably 0.3 μm or more and 3 μm or less.

[0177] <11> Skin coating composition as described in any of <1> to <10>, wherein component (B) is a fiber of a water-insoluble polymer.

[0178] <12> The skin coating composition described in any one of <1> to <11>, wherein component (B) is a fiber having one or more polymers selected from fully saponified polyvinyl alcohol that can be insoluble after coating formation, partially saponified polyvinyl alcohol that can be crosslinked after coating formation by use with a crosslinking agent, acrylic resins such as polymethyl methacrylate, polyvinyl butyral resin, polyurethane resin, polylactic acid, oxazoline-modified silicone such as poly(N-propionyl ethylimide) grafted-dimethylsiloxane / γ-aminopropyl methylsiloxane copolymer, polyvinyl acetal diethylamino acetate, and corn protein; preferably, a fiber having one or more polymers selected from polyvinyl butyral resin, acrylic resin, polypropylene resin, polyurethane resin, polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoic acid.

[0179] <13> Skin coating composition as described in any of <1> to <12>, wherein component (B) is a fiber having a copolymer of (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate).

[0180] <14> The skin coating composition described in any one of <1> to <13>, wherein the average fiber length of component (B) is 20 μm or more and 300 μm or less, preferably 25 μm or more and 250 μm or less, more preferably 30 μm or more and 200 μm or less, and even more preferably 40 μm or more and 200 μm or less.

[0181] <15> The skin coating composition described in any one of <1> to <14>, wherein the aspect ratio (average fiber length / average fiber diameter) of component (B) is 20 or more and 250 or less, more preferably 25 or more and 200 or less, and more preferably 27 or more and 200 or less.

[0182] <16> The skin coating composition described in any one of <1> to <15>, wherein the CV value of the fiber length of component (B) is 40% or more and 100% or less, preferably 42% or more and 95% or less, more preferably 45% or more and 90% or less.

[0183] <17> The skin coating composition described in any one of <1> to <16>, wherein component (B) contains fibers with an average fiber length of 40 μm or more, preferably containing fibers with an average fiber length of 50 μm or more.

[0184] <18> As described in any of <1> to <17>, the skin coating composition contains an average fiber diameter. 2 / Fiber content (μm)2 The content (in mass%) is 0.02 or more and 7 or less, preferably 0.02 or more and 6 or less, more preferably 0.03 or more and 5 or less, and even more preferably 0.05 or more and 4 or less.

[0185] <19> The skin coating composition described in any one of <1> to <18>, wherein the content of component (B) is 0.1% by mass or more and 1.8% by mass or less, preferably 0.2% by mass or more and 1.8% by mass or less, more preferably 0.2% by mass or more and 1.6% by mass or less.

[0186] <20> The skin coating composition described in any one of <1> to <19>, wherein the mass ratio of component (B) to component (A) (B) / (A) is 0.06 or more and 0.9 or less, preferably 0.08 or more and 0.7 or less, more preferably 0.1 or more and 0.7 or less.

[0187] <21> The skin coating composition described in any one of <5> to <20>, wherein component (C) is preferably selected from one or more of water and oils that are liquid at 20°C.

[0188] <22> The skin coating composition described in any of <5> to <20>, wherein component (C) is water and one or more oils selected from ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorinated oils and non-volatile silicone oils.

[0189] <23> The skin coating composition described in any one of <5> to <22>, wherein component (B) is preferably dispersed in component (C).

[0190] <24> The skin coating composition described in any one of <6> to <23>, wherein component (D) is selected from one or more types of body pigments and coloring pigments, preferably containing coloring pigments.

[0191] <25> The skin coating composition described in any of <6> to <24>, wherein component (D) contains one or more coloring pigments selected from inorganic colored pigments, inorganic white pigments, organic coloring pigments, organic pigments and pearlescent pigments (glossy powders).

[0192] <26> The skin coating composition described in any one of <6> to <25>, wherein component (D) contains a coloring pigment, and the content of the coloring pigment in the coating composition is 0.1% by mass or more and 60% by mass or less.

[0193] <27> The skin coating composition described in any one of <6> to <26>, wherein the mass ratio of the content of the coloring pigment (D1) to the content of component (D) (D1) / (D) is 0.3 or more and 1 or less.

[0194] <28> The skin coating composition described in any of <1> to <27>, wherein component (B) is a biodegradable resin.

[0195] <29> A method for manufacturing a coating on the skin surface, wherein,

[0196] Includes the step of applying the skin coating composition described in any one of <1> to <28> to the skin.

[0197] <30> A coating comprising a skin coating forming composition as described in any one of <1> to <28>.

[0198] Use of the skin coating composition described in any one of <31>, <1> to <28> as an emulsified cosmetic.

[0199] <32> The use of the skin coating composition described in any one of <1> to <28> for applying to the skin, preferably the face, for use in makeup and / or for ultraviolet protection.

[0200] <33> Use of the skin coating forming composition described in any one of <1> to <28> above in the manufacture of a cosmetic coating on the skin surface.

[0201] [Example]

[0202] Secondly, embodiments are provided to illustrate the present invention in more detail.

[0203] [Example of manufacturing component (B)]

[0204] Example of manufacturing fiber B.

[0205] (1) An acrylic resin ((octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer) was dissolved in ethanol to obtain an 18% by mass solution. This solution was then used for… Figure 1 The electrospinning apparatus shown forms nanofiber sheets on the surface of the collector. The fabrication conditions for the nanofibers are as follows.

[0206] • Applied voltage: 30kV

[0207] • Distance between capillary tube and collector: 150mm

[0208] • Aqueous solution dispensing rate: 12 mL / hour

[0209] • Environment: 25℃, 30% RH

[0210] (2) After the obtained nanofiber sheets are appropriately cut, a dispersing blade is installed in a stirring system (manufactured by PRIMIX Co., Ltd., LABOLUTION (registered trademark)) and pulverized at a speed of 5000 rpm for 30 minutes to obtain fiber B.

[0211] By changing the polymer concentration, rotation speed, and shearing time, fibers A, C, and F were manufactured in the same manner as fiber B.

[0212] Another example is the manufacturing of fiber G.

[0213] (1) Dissolve the ester resin (polylactic acid) in chloroform and dimethylformamide (80:20 weight ratio) to obtain a 20% by mass solution. Use these solutions for… Figure 1 The electrospinning apparatus shown forms nanofiber sheets on the surface of the collector. The manufacturing conditions for the nanofibers are as follows.

[0214] • Applied voltage: 30kV

[0215] • Distance between capillary tube and collector: 150mm

[0216] • Aqueous solution dispensing rate: 12 mL / hour

[0217] • Environment: 25℃, 30% RH

[0218] (2) The obtained nanofiber sheets were sheared 8 times in a circulation pipeline at 13,500 rpm using a dispersion device (Milder manufactured by Pacific Machinery Co., Ltd.) to obtain fibers.

[0219] By changing the polymer concentration and the number of cycles, fiber H was manufactured in the same manner as fiber G.

[0220] [Example of composition manufacturing]

[0221] By blending the obtained fibers and the components listed in Tables 1 to 4, a water-in-oil emulsion composition was obtained.

[0222] [Examples 1-13 and Comparative Examples 1-5]

[0223] The water-in-oil emulsion compositions listed in Tables 1-4 were applied to artificial leather, and the abrasion resistance, hiding power, and colorfastness of the coatings were evaluated. The results are shown in Tables 1-4.

[0224] (Evaluation Method)

[0225] [Coverage Effect]

[0226] The sample was spread on black artificial leather (SUPPLALE: manufactured by IDEMITSU TECHNOFINE) using a 25 μm dripper. It was dried using a 40°C hot plate, and then further dried overnight at room temperature.

[0227] Colorimetric measurements were performed using a colorimeter (CR-400: KONICA MINORUTA). The difference in brightness (L* value) between the uncoated black artificial leather and the sample was calculated to account for the increase in brightness of the black artificial leather due to the coating, and this difference was used as the masking effect. The average value from five measurements was used.

[0228] [Good hair color]

[0229] The sample was spread on black artificial leather (SUPPLALE: IDEMITSU TECHNOFINE) using a 25 μm dropper. It was dried using a 40°C hot plate and then further dried overnight at room temperature. Colorimetry was performed using a colorimeter (CR-400: KONICAMINORUTA). Chroma was used as a reference, with Comparative Example A (without the addition of disintegrating fine fibers) as a benchmark, to determine the degree of vibrancy (good color development) of the coating. The average value at 5 locations was used.

[0230] Chroma = ((a) 试样* -a 黑皮革* ) 2 +(b 试样* -b 黑皮革* ) 2 ) 0.5

[0231] [Abrasion Resistance]

[0232] The sample was spread on black artificial leather (LAFORET: manufactured by TEIJIN CORDLEY) using a 152 μm dripper. It was dried using a 40°C hot plate, and then further dried overnight at room temperature.

[0233] Use your right middle finger to rub the sample surface in a specific direction. Wipe with a tissue each time. Count the number of wipings until the coating disappears.

[0234]

[0235]

[0236]

[0237]

[0238] [Table 3]

[0239]

[0240] [Table 4]

[0241]

[0242] [Symbol Explanation]

[0243] 10: Electrostatic spraying device

[0244] 11: Syringe

[0245] 12: High voltage source

[0246] 13: Conductive collector

[0247] 11a: Cylinder

[0248] 11b: Piston

[0249] 11c: Capillary.

Claims

1. A skin coating composition, wherein, It contains the following ingredients (A), (B) and (C): (A) Silicone coating forming agents; (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less, and an aspect ratio of average fiber length to average fiber diameter of 10 or more and 300 or less, and whose proportions relative to the total of the coating-forming composition are 0.05% by mass or more and 2% by mass or less; (C) Water and non-volatile oils that are liquid at 20°C, wherein the amount of water is 15% by mass or more and 90% by mass or less relative to the total amount of the film-forming composition; The mass ratio of component (B) to component (A) (B) / (A) is 0.25 or more and 1 or less.

2. The skin coating composition as claimed in claim 1, wherein, Component (B) is a fiber containing a water-insoluble polymer.

3. The skin coating composition as claimed in claim 1, wherein, The aspect ratio of component (B), i.e., the average fiber length / average fiber diameter, is 10 or more and 200 or less.

4. The skin coating composition according to any one of claims 1 to 3, wherein, The content of component (A) is 0.01% by mass or more and 10% by mass or less relative to the total content of the coating-forming composition.

5. The skin coating composition according to any one of claims 1 to 3, wherein, The mass ratio of water to component (C1) by component (C) is 0.5 or more and 0.96 or less.

6. The skin coating composition according to any one of claims 1 to 3, wherein, Further contains component (D) powder.

7. The skin coating composition according to any one of claims 1 to 3, wherein, Component (A) is selected from one or more of trimethylsiloxysilicic acid and acrylic silicone dendritic polymers.

8. A method for manufacturing a coating on a skin surface, wherein, include: The step of applying the skin coating composition according to any one of claims 1 to 7 to the skin.

9. A coating, wherein, A skin coating composition comprising any one of claims 1 to 7.

10. Use of the skin coating composition according to any one of claims 1 to 7 as an emulsified cosmetic.

11. Use of the skin coating composition according to any one of claims 1 to 7 for application to the skin for cosmetic and / or ultraviolet protection.

12. Use of the skin coating composition according to any one of claims 1 to 7 applied to the face for use as makeup and / or for UV protection.

13. Use of the skin coating forming composition according to any one of claims 1 to 7 for creating a cosmetic coating on the skin surface.

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