Oil-based cosmetic

Abstract

To provide an oily cosmetic which suppresses or reduces unevenness or a pattern such as a streak-like flow mark and is excellent in glossiness of appearance.SOLUTION: There is provided an oily cosmetic which comprises a first brilliant pigment having an average particle diameter of 80 μm or less and a polymer-based oil-phase thickener, wherein the mass ratio between the first brilliant pigment and a second brilliant pigment having an average particle diameter of more than 80 μm is 55:45 to 100:0, the mass ratio of the first brilliant pigment to a coloring material is 2.0 or more when a coloring material is contained, the content of thickening particles is less than 4.0 mass% and the viscosity at least under a partial temperature of 80 to 150°C is 50 MPa s or more.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to oil-based cosmetics.

Background Art

[0002] In recent years, various oil-based cosmetics have been developed.

[0003] Patent Document 1 discloses a stick-shaped oil-based solid cosmetic having a transparent outer layer portion and a colored inner layer portion that are in contact with each other, and containing at least component (A) dibutyl lauroyl glutamide, component (B) dibutyl ethylhexanoyl glutamide, and component (C) a polyglycerin fatty acid ester in which the degree of polymerization of glycerin is 6 to 12 and the fatty acid is a branched fatty acid having 8 to 22 carbon atoms.

[0004] Patent Document 2 discloses a stick-shaped cosmetic containing (a) a polyethylene wax having a crystallization start temperature of 80 to 95°C and (b) a microcrystalline wax having a crystallization start temperature of 85 to 100°C in a mass ratio of (a):(b) = 99:1 to 60:40, and containing 30% by mass or more of a liquid oil component having an IOB of 0.2 or more.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] For example, there is known a technique of imparting a glossy texture such as a pearl feeling to the lips by blending a colored glossy pigment or by blending a colorless or white glossy pigment and a coloring material into an oil-based cosmetic such as a lipstick.

[0007] Oil-based cosmetics such as lipsticks are prepared, for example, by heating and melting a solidifying agent such as wax, mixing additives such as pigments therewith, injecting the resulting mixture into a mold, and cooling. At this time, as the additive, for example, a colored glitter pigment may be used, or a colorless or white glitter pigment and a coloring material may be used in combination, in which case patterns such as uneven or streaky flow marks as shown in Fig. 1(a) may occur. Even when an oil-based cosmetic having such a pattern is used as a lipstick, for example, and applied to the lips, as shown in Fig. 1(b), since the color tone and the glittery texture are sufficiently obtained, conventionally, products have often been commercialized with patterns such as uneven or streaky flow marks present in the appearance of the oil-based cosmetic.

[0008] However, in recent years, in addition to performance such as simple color retention or good color development, the aesthetic appearance of oil-based cosmetics themselves has come to be regarded as important.

[0009] Therefore, the subject of the present disclosure is to provide an oil-based cosmetic in which patterns such as uneven or streaky flow marks are reduced or suppressed and which is excellent in the glossiness of the appearance.

Means for Solving the Problems

[0010] 〈Aspect 1〉 An oil-based cosmetic comprising a first glitter pigment having an average particle diameter of 80 μm or less and a polymer-based oil phase thickener, wherein the mass ratio of the first glitter pigment to a second glitter pigment having an average particle diameter of more than 80 μm is 55:45 to 100:0, when a coloring material is included, the mass ratio of the first glitter pigment to the coloring material is 2.0 or more, the content of thickening particles is less than 4.0% by mass, and the viscosity at at least a part of the temperature of 80 to 150°C is 50 mPa·s or more. Oil-based cosmetic. 〈Aspect 2〉 The cosmetic according to Aspect 1, wherein the content of the first glitter pigment is 2.0% by mass or more. <Aspect 3> The cosmetic according to aspect 1 or 2, wherein the polymer-based oil-phase thickener contains a copolymer having at least one selected from ethylene monomer units and styrene monomer units. <Aspect 4> The cosmetic according to any one of aspects 1 to 3, further comprising a hydrocarbon oil. <Aspect 5> The cosmetic according to any one of aspects 1 to 4, which contains a coloring material and wherein the first fluorescent pigment is a colorless or white fluorescent pigment. <Aspect 6> The cosmetic according to any one of aspects 1 to 5, which is used as a lipstick. <Aspect 7> A method for producing a cosmetic according to any one of aspects 1 to 6, comprising melting a raw material mixture containing the first fluorescent pigment and the polymer-based oil-phase thickener at a temperature of 80 to 150 °C at which the viscosity of the mixture becomes 50 mPa·s or more, and injecting the mixture into a mold. The method for producing a cosmetic according to any one of aspects 1 to 6.

Advantages of the Invention

[0011] According to the present disclosure, it is possible to provide an oily cosmetic in which patterns such as uneven or streak-like flow marks (which may be simply referred to as "flow marks") are reduced or suppressed and which has excellent glossiness in appearance.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present disclosure will be described in detail. The present disclosure is not limited to the following embodiments and can be implemented with various modifications within the scope of the gist of the invention.

[0014] The oil-based cosmetic (sometimes simply referred to as "cosmetic") of the present disclosure contains a first luminous pigment with an average particle diameter of 80 μm or less and a polymer-based oil-phase thickener. The mass ratio of the first luminous pigment to a second luminous pigment with an average particle diameter exceeding 80 μm is 55:45 to 100:0. When a colorant is included, the mass ratio of the first luminous pigment to the colorant is 2.0 or more. The content of the thickening particles is less than 4.0% by mass, and the viscosity at at least a part of the temperature range from 80 to 150 °C is 50 mPa·s or more.

[0015] Although not limited by theory, it is considered that the working principle by which such an oil-based cosmetic reduces or suppresses patterns such as unevenness or streak-like flow marks and has excellent glossiness in appearance is as follows.

[0016] For example, a stick-shaped oil-based cosmetic is generally prepared by injecting a mixture containing a solid agent such as heated and melted wax and additives such as a luminous pigment from above a mold and then cooling it. At this time, convection occurs in the mold due to this injection, and the luminous pigment and the like are oriented along the flow of the convection and are cooled and solidified in that state. Therefore, it is considered that unevenness or streak-like flow marks appear on the appearance of the stick. The oil-based cosmetic of the present disclosure is designed to exhibit a viscosity of 50 mPa·s or more at at least a part of the temperature range from 80 to 150 °C, for example, at the temperature at which the raw material mixture for the stick-shaped oil-based cosmetic is melted, injected into the mold, and the stick-shaped cosmetic is molded, by using a polymer-based oil-phase thickener. As a result, the orientation of the luminous pigment due to the above-described convection is reduced or suppressed, and thus it is considered that the flow marks on the appearance of the oil-based cosmetic are reduced or suppressed.

[0017] Regarding the gloss of the appearance of an oil-based cosmetic, it is first considered that the size of the glitter pigment has an influence. For example, in the case of a glitter pigment having a flaky shape, the large flat plate surface contributes most to the glitter. Streaky flow marks appear, for example, as horizontal stripe patterns. In the case of a horizontal stripe pattern, a large flaky glitter pigment with a large size is less likely to contribute to the glossiness of the appearance of the oil-based cosmetic because the flat plate surface of the glitter pigment contributing to the glitter is likely to be oriented substantially perpendicular to the axial direction in the stick along the flow of convection.

[0018] On the other hand, in the case of a small glitter pigment with an average particle diameter of 80 μm or less, it is considered that this glitter pigment tends to move in the cosmetic while randomly rotating by convection. As a result, the flat plate surface of the glitter pigment contributing to the glitter is more likely to be oriented substantially parallel to the axial direction in the stick compared to a large glitter pigment with a large size. Therefore, it is considered that the use of a small glitter pigment with an average particle diameter of 80 μm or less can improve the surface glossiness of the appearance of the oil-based cosmetic.

[0019] Next, it has been found that when a large glitter pigment (second glitter pigment) with an average particle diameter exceeding 80 μm is used in combination with a small glitter pigment (first glitter pigment) with an average particle diameter of 80 μm or less, the surface appearance of the oil-based cosmetic may be impaired. This is considered to be because the random rotational movement of the smaller-sized glitter pigment is inhibited by the above-described orientation in the large glitter pigment with an average particle diameter exceeding 80 μm. When using a glitter pigment in such a configuration in the cosmetic of the present disclosure, the mass ratio of the first glitter pigment with an average particle diameter of 80 μm or less to the second glitter pigment with an average particle diameter exceeding 80 μm is set to 55:45 to 100:0, whereby such a problem can be solved, and it is considered that the glossiness of the appearance of the oil-based cosmetic can be improved.

[0020] In addition, when the size of the pearlescent pigment is large, even if a colorant and / or thickening particles such as fumed silica adhere to the flat surface of the pearlescent pigment that contributes to pearlescence, since the area of the flat surface is large, the influence of reduced pearlescence is considered to be small. However, in the case of small pearlescent pigments with an average particle diameter of 80 μm or less, since the area of the flat surface is small, if a colorant and / or thickening particles adhere thereto, it is considered that it becomes difficult to exhibit pearlescence. The cosmetic of the present disclosure solves such a problem by setting the content of the thickening particles to less than 4.0% by mass and, when using a colorant, setting the mass ratio of the first pearlescent pigment having an average particle diameter of 80 μm or less to the colorant to 2.0 or more, and it is considered that the glossiness of the appearance of the oil-based cosmetic can be improved.

[0021] By adopting the above-described configuration, the oil-based cosmetic of the present disclosure can reduce or suppress patterns such as uneven or streak-like flow marks, and in addition, can provide an unprecedented excellent glossiness to the appearance of the oil-based cosmetic, such as that of a new car body or when a pearlescent pigment is directly applied to the surface of the oil-based cosmetic.

[0022] 《Oil-based Cosmetic》 The oil-based cosmetic of the present disclosure can exhibit a viscosity of 50 mPa·s or more at at least a part of the temperature range of 80 to 150°C, for example, at 90°C. Such a viscosity can be, for example, 50 mPa·s or more, 60 mPa·s or more, 70 mPa·s or more, 80 mPa·s or more, 90 mPa·s or more, or 100 mPa·s or more from the viewpoints of the glossiness of the appearance of the cosmetic, reduction or suppression of flow marks, etc. There is no particular limitation on the upper limit value of the viscosity, but it can be, for example, 35,000 mPa·s or less, 30,000 mPa·s or less, 25,000 mPa·s or less, 20,000 mPa·s or less, 15,000 mPa·s or less, 10,000 mPa·s or less, 8,000 mPa·s or less, 5,000 mPa·s or less, 3,000 mPa·s or less, or 1,000 mPa·s or less.

[0023] 〈Pearlescent Pigment〉 The cosmetic of the present disclosure contains a first luminous pigment having an average particle diameter of 80 μm or less. The first luminous pigment may be any of colorless, white, and colored. The colorless, white, and colored first luminous pigments may be used alone or in combination.

[0024] The average particle diameter of the first luminous pigment can be 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, or 30 μm or less from the viewpoint of the glossiness of the appearance of the cosmetic. The lower limit of the average particle diameter of the first luminous pigment is not particularly limited, but can be 5 μm or more, 7 μm or more, 10 μm or more, 13 μm or more, or 15 μm or more from the viewpoint of the glossiness of the appearance of the cosmetic. Here, the average particle diameter of the luminous pigment in the present disclosure refers to the light scattering equivalent diameter when optically measured by the dynamic light scattering method assuming that the particle shape of the luminous pigment particles is spherical. The light scattering equivalent diameter is defined as, for example, according to "Newest Powder Physical Property Illustrated Book (Third Edition)" (published on June 30, 2004, publisher: Yutaka Kurata, publisher: NGT Co., Ltd.), the diameter of a sphere that shows the scattering pattern closest to the light scattering pattern of the particles obtained by measurement and has the same refractive index as the particles.

[0025] The blending amount of the first luminous pigment is not particularly limited, but can be 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, or 5.0% by mass or more based on the total amount of the cosmetic from the viewpoints of the glossiness of the appearance of the cosmetic, the beauty when applying the cosmetic, etc. The upper limit of the blending amount of the first luminous pigment is not particularly limited, but can be 20% by mass or less, 15% by mass or less, 10% by mass or less, or 8.0% by mass or less.

[0026] The cosmetic of the present disclosure may contain a second luminous pigment having an average particle diameter exceeding 80 μm as long as it does not affect the effects of the present invention. However, from the viewpoint of the glossiness of the appearance of the cosmetic, the mass ratio of the first luminous pigment having an average particle diameter of 80 μm or less to the second luminous pigment having an average particle diameter exceeding 80 μm is advantageously in the range of 55:45 to 100:0. Such a mass ratio is preferably in the range of 60:40 to 100:0, more preferably in the range of 70:30 to 100:0, still more preferably in the range of 80:20 to 100:0, and particularly preferably in the range of 90:10 to 100:0. The second luminous pigment having a large size reduces the uniform glossiness of the appearance of the cosmetic and may cause, for example, in the case of a stick-shaped cosmetic, a dot-like unnatural gloss to appear on the stick or the applied lips. Therefore, it is preferable that the blending amount of this second luminous pigment is small, and it is more preferable not to blend the second luminous pigment.

[0027] There are no particular restrictions on the type of the luminous pigment, and it can be appropriately selected in consideration of the beauty at the time of applying the cosmetic, the glossiness of the appearance of the cosmetic, etc. For example, a luminous pigment generally called a pearl agent can be used. The luminous pigments can be used alone or in combination of two or more.

[0028] Examples of the pearlescent pigment include, for example, mica titanium, iron oxide-coated mica titanium, carmine-coated mica titanium, carmine and congo-coated mica titanium, iron oxide and carmine-treated mica titanium, congo-treated mica titanium, iron oxide and congo-treated mica titanium, chromium oxide-treated mica titanium, black titanium oxide-treated mica titanium, acrylic resin-coated aluminum powder, silica-coated aluminum powder, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-coated mica, titanium oxide-coated synthetic mica, titanium oxide-coated silica, titanium oxide-coated alumina, titanium oxide-coated glass powder, polyethylene terephthalate and polymethyl methacrylate laminated film powder, bismuth oxychloride, fish scale foil, iron oxide and titanium oxide-coated mica such as red iron oxide-coated mica obtained by coating mica with iron oxide and titanium oxide, and titanium oxide in a powdery hollow shape having silica interposed between mica and a titanium oxide-coated layer. These typically exhibit white or other colors.

[0029] As the colorless pearlescent pigment, known ones known as transparent pearlescent pigments can be used. For example, a pearlescent pigment obtained by forming a film composed of a high refractive index material such as titanium dioxide on the surface of glass particles as a base material can be mentioned.

[0030] In the present disclosure, the "pearlescent pigment" is intended to mean a pigment that exhibits pearlescence and does not include the colorant described later. Further, the "colored pearlescent pigment" is intended to mean a pearlescent pigment that exhibits a color other than colorless or white. Further, the pearlescent pigment typically exhibits a flat plate-like form such as a flaky or scaly form.

[0031] 〈Polymer-based oil phase thickener〉 The cosmetic of the present disclosure can be prepared to have the above-described viscosity using a polymer-based oil-phase thickener. From the viewpoint of the glossiness of the appearance of the cosmetic, etc., it is advantageous for the polymer-based oil-phase thickener to be a transparent polymer-based oil-phase thickener. For example, the thickening particles used in the preparation of conventional stick-shaped cosmetics can, as described above, adhere to the flat surface of the glitter pigment and cause loss of glitter. However, a polymer-based oil-phase thickener, particularly a transparent polymer-based oil-phase thickener, is less likely to reduce the glitter even when it adheres to the flat surface of the glitter pigment compared to the thickening particles.

[0032] The polymer-based oil-phase thickener may be appropriately blended so as to exhibit the above-described viscosity, and there is no particular limitation on its blending amount. For example, from the viewpoints of the glossiness of the appearance of the cosmetic, usability, etc., it can be 0.5% by mass or more, 1.0% by mass or more, 3.0% by mass or more, or 5.0% by mass or more with respect to the total amount of the cosmetic, and it can also be 60% by mass or less, 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, or 10% by mass or less.

[0033] There is no particular limitation on the polymer-based oil-phase thickener. For example, an agent containing a copolymer having at least one selected from ethylene monomer units and styrene monomer units can be used. Here, for example, a copolymer having a styrene monomer unit (styrene segment) can cause the styrene segments in the copolymer to be attracted to each other in the oil phase and develop a three-dimensional network structure between the copolymers, thereby thickening the oil phase.

[0034] Such polymer-based oil phase thickeners can specifically include at least one selected from (styrene / isoprene) copolymers, (ethylene / propylene / styrene) copolymers, (styrene / butadiene) copolymers, (styrene / ethylene / butylene) copolymers, (styrene / propylene / butylene) copolymers, (styrene / butylene) copolymers, and (ethylene / propylene) copolymers. These copolymers may be hydrogenated. Among them, from the viewpoint of the glossiness of the appearance of the cosmetic, etc., the polymer-based oil phase thickener preferably includes at least one selected from hydrogenated (styrene / isoprene) copolymers, (ethylene / propylene / styrene) copolymers, (styrene / ethylene / butylene) copolymers, and (ethylene / propylene) copolymers.

[0035] 〈Thickening particles〉 For example, in conventional stick-shaped oily cosmetics, typically, thickening particles are blended to adjust the viscosity of the cosmetics. However, when these thickening particles adhere to the flat surface of the first bright pigment, it may cause loss of brightness and it may be difficult to obtain good gloss in the appearance of the cosmetics.

[0036] Therefore, in the cosmetics of the present disclosure, the thickening particles may be contained in less than 4.0% by mass, 3.5% by mass or less, 3.0% by mass or less, 2.5% by mass or less, 2.0% by mass or less, less than 2.0% by mass, 1.5% by mass or less, 1.0% by mass or less, or 0.5% by mass or less based on the total amount of the cosmetics. However, from the viewpoint of the glossiness of the appearance of the cosmetics, it is preferable not to blend the thickening particles in the cosmetics.

[0037] Examples of such thickening particles include thickening inorganic particles such as fumed silica anhydride and organically modified clay minerals. These may be subjected to a hydrophobization treatment.

[0038] Examples of the organically modified clay minerals include water-swellable clay minerals treated with quaternary ammonium salts, etc.

[0039] 〈Colorant〉 The cosmetic of the present disclosure may contain a coloring material. In particular, when using a colorless or white fluorescent pigment, it is preferable to simultaneously contain a coloring material from the viewpoints of beauty properties at the time of applying the cosmetic. Here, in the present disclosure, the "coloring material" is intended to mean a material that does not exhibit fluorescence and can cause the cosmetic to develop color, and specifically, it can be intended to mean materials generally referred to as inorganic pigments, organic pigments, and dyes.

[0040] As the blending amount of the coloring material, for example, from the viewpoints of glossiness and beauty properties of the appearance of the cosmetic, it can be 10% by mass or less, 7.0% by mass or less, 5.0% by mass or less, 3.0% by mass or less, or 1.5% by mass or less with respect to the total amount of the cosmetic. When the cosmetic contains a colored fluorescent pigment, the coloring material may not be blended.

[0041] When the first fluorescent pigment and the coloring material are used in combination, from the viewpoint of the glossiness of the appearance of the cosmetic, it is preferable that the mass ratio of the first fluorescent pigment to the coloring material is 2.0 or more, 2.5 or more, 3.0 or more, 3.5 or more, or 4.0 or more. Although there is no particular limitation on the upper limit value of this mass ratio, for example, it can be 20 or less, 15 or less, 10 or less, or 8.0 or less.

[0042] There is no particular limitation on the type of the coloring material, and it can be appropriately selected in consideration of the beauty properties at the time of applying the cosmetic, the glossiness of the appearance of the cosmetic, and the like.

[0043] Specifically, examples of the inorganic pigment include inorganic red pigments (for example, iron oxide (vermilion), iron titanate, etc.); inorganic brown pigments (for example, γ-iron oxide, etc.); inorganic yellow pigments (for example, yellow iron oxide, loess, etc.); inorganic black pigments (for example, black iron oxide, lower-order titanium oxide, etc.); inorganic purple pigments (for example, manganese violet, cobalt violet, etc.); inorganic green pigments (for example, chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (for example, ultramarine, navy blue, etc.); inorganic white pigments (for example, titanium dioxide, zinc oxide, etc.); metal powders (for example, aluminum, gold, silver, copper, etc.).

[0044] Examples of organic pigments include organic pigments such as zirconium, barium or aluminum lakes, such as Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Red No. 201, Red No. 202, Red No. 203, Red No. 204, Red No. 205, Red No. 206, Red No. 207, Red No. 208, Red No. 213, Red No. 214, Red No. 215, Red No. 218, Red No. 219, Red No. 220, Red No. 221, Red No. 223, Red No. 225, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 231, Red No. 232, Red No. 401, Red No. 404, Red No. 405, Red No. 501, Red No. 502, Red No. 503, Red No. 504, Red No. 505, Red No. 506, Orange No. 201, Orange No. 205, Orange No. 401, Yellow No. 4, Yellow No. 5, Yellow No. 201, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 205, Yellow No. 401, Yellow No. 402, Yellow No. 403 (1), Yellow No. 404, Yellow No. 405, Yellow No. 406, Yellow No. 407, Blue No. 1, Blue No. 404, Green No. 3, Green No. 201, Green No. 202, Green No. 204, Violet No. 201, etc. can be mentioned.

[0045] Examples of natural pigments include, for example, β-carotene, cochineal pigment, red cabbage pigment, riboflavin, crocin, anthraquinone, canthaxanthin, safflower pigment, etc.

[0046] The coloring materials can be used alone or in combination of two or more.

[0047] 〈Oil content〉 The cosmetic of the present disclosure can contain an oil content.

[0048] There is no particular limitation on the blending amount of the oil content. For example, it can be 30% by mass or more, 40% by mass or more, 50% by mass or more, or 60% by mass or more with respect to the total amount of the cosmetic, and can also be 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, or 70% by mass or less.

[0049] There are no particular restrictions on the oil component. For example, it may be an animal oil, a vegetable oil, or a synthetic oil, and its properties may be, for example, solid, semi-solid, liquid, or volatile. Specifically, examples include hydrocarbon oils, fats and oils, waxes, hardened oils, fatty acids, higher alcohols, silicone oils, fluorine-based oils, oil gelling agents, and polar oils. The oil component can be used alone or in combination of two or more.

[0050] Examples of hydrocarbon oils include liquid paraffin, heavy liquid isoparaffin, α-olefin oligomer, squalane, petrolatum, polyisobutene, hydrogenated polyisobutene, polybutene, hydrogenated polybutene, polydecene, and hydrogenated polydecene.

[0051] Examples of fats and oils include olive oil, castor oil, jojoba oil, mink oil, and macadamia nut oil.

[0052] Examples of waxes include paraffin wax, ceresin wax, microcrystalline wax, polyethylene wax, montan wax, Fischer-Tropsch wax, carnauba wax, candelilla wax, spermaceti, beeswax, and shellac wax.

[0053] Examples of fatty acids include stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, and oleic acid.

[0054] Examples of higher alcohols include stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, behenyl alcohol, and octyldodecanol.

[0055] Examples of silicones include low-polymerization-degree dimethylpolysiloxane, high-polymerization-degree dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, polyether-modified polysiloxane, polyoxyalkylene·alkylmethylpolysiloxane·methylpolysiloxane copolymer, alkoxy-modified polysiloxane, crosslinked organopolysiloxane, fluorine-modified polysiloxane, and the like.

[0056] Examples of fluorine-based oil agents include perfluorodecane, perfluorooctane, perfluoropolyether, and the like.

[0057] Examples of oil gelling agents include sucrose fatty acid ester, starch fatty acid ester, aluminum 12-hydroxystearate, calcium stearate, and the like.

[0058] Examples of polar oils include polar oils with an IOB of 0.10 or more, 0.15 or more, 0.20 or more, 0.22 or more, or 0.24 or more. The upper limit value of IOB is not particularly limited, but it can be, for example, 0.50 or less, 0.45 or less, or 0.40 or less. Here, the IOB value is an abbreviation for Inorganic / Organic Balance (inorganicity / organicity ratio), which represents the ratio of the inorganic value to the organic value and is an index indicating the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. For each of the "inorganic value" and "organic value", for example, the "organic value" is 20 for one carbon atom in the molecule, and the "inorganic value" is 100 for one hydroxyl group. The "inorganic value" and "organic value" corresponding to various atoms or functional groups are set, and the IOB value of the organic compound can be calculated by integrating the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound (see, for example, Yoshio Koda, "Organic Conceptual Diagram - Basics and Applications -", pp. 11-17, Sankyo Publishing, issued in 1984).

[0059] Examples of such polar oils include neopentyl glycol dicaprate, glyceryl tri(2-ethylhexanoate), pentaerythrityl tetra(2-ethylhexanoate), glyceryl tri(caprylic / capric)ate, diethylhexyl sebacate, octyldodecanol, glyceryl diisostearate, diglyceryl triisostearate, diisostearyl malate, trimethylolpropane tri(2-ethylhexanoate), dioctyldodecyl azelate, pentaerythrityl tetra(ethylhexanoate / benzoate), trioctanoin, pentaerythrityl tetraoctanoate, dipentaerythrityl hexahydroxystearate, castor oil, diisopropyl sebacate, pentaerythrityl tetraoctanoate, trimethylolpropane triisostearate, and the like.

[0060] These oils can be used as a base for oil-based cosmetics. When the base itself has excellent transparency, for example, the pearlescent pigments present on the inner side rather than the surface of the oil-based cosmetics can also contribute to the reflection of light from the outside, so the gloss of the appearance of the oil-based cosmetics can be further improved. From the perspective of improving the transparency of the base material itself and further improving the gloss of the appearance of the oil-based cosmetics, among the above-mentioned oils, at least one selected from hydrogenated polyisobutene, microcrystalline wax, polyethylene wax, octyldodecanol, diisostearyl malate, and neopentyl glycol dicaprate is preferred.

[0061] On the other hand, for example, diglyceryl triisostearate, diglyceryl tetraisostearate, pentaerythrityl tetraoctanoate, dipentaerythrityl tetraisostearate, and dipentaerythrityl hexahydroxystearate may reduce the transparency of the base itself. Therefore, these oils may be contained in the range of 2.0% by mass or less, less than 2.0% by mass, 1.5% by mass or less, 1.0% by mass or less, less than 1.0% by mass, 0.5% by mass or less, or less than 0.5% by mass based on the total amount of the cosmetics. However, it is preferable not to incorporate these oils into the cosmetics.

[0062] <Optional Component> In the oil-based cosmetics of the present disclosure, various components can be appropriately blended in addition to the above components as long as the effects of the present invention are not affected. Examples of the various components include, for example, humectants, preservatives, defoamers, antioxidants, ultraviolet absorbers, polymers, surfactants, polymer-based oil-phase thickeners, and thickeners other than thickening particles (sometimes referred to as "second thickeners"), drugs, alcohols, antibacterial agents, solvents, and fragrances. These optional components can be used alone or in combination of two or more.

[0063] Here, there is no particular limitation on the ultraviolet absorber. For example, organic ultraviolet absorbers such as ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, t-butylmethoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, oxybenzone-3, methylene bisbenzotriazolyl tetramethylbutylphenol, homosalate, and ethylhexyl salicylate can be mentioned. The ultraviolet absorber can be used alone or in combination of two or more. Note that such organic ultraviolet absorbers may be regarded as oil components.

[0064] <<Method for Producing Oil-Based Cosmetics>> The method for producing the oil-based cosmetics of the present disclosure is not particularly limited, and a known production method can be adopted. For example, stick-shaped oil-based cosmetics can be obtained as follows.

[0065] The raw material mixture for stick-shaped oily cosmetics containing the above-described first fluorescent pigment having an average particle diameter of 80 μm or less, a polymer-based oil-phase thickener, and optional components such as colorants as required is kneaded while heating in a temperature range of 80 to 150°C, and an oily composition is prepared such that the viscosity at at least a part of the temperature of 80 to 150°C, for example, at 90°C, is 50 mPa·s or more. Here, the preparation of this specific viscosity can typically be achieved by a polymer-based oil-phase thickener and its amount. Further, the polymer-based oil-phase thickener may be used after being mixed and dissolved with the above-described oil component.

[0066] The oily composition heated and melted to exhibit the above-described predetermined viscosity is poured into a stick-shaped mold. After cooling to room temperature (for example, 0 to 30°C), the mold can be removed to obtain a stick-shaped oily cosmetic. Here, as the mold, from the viewpoint of the surface gloss of the stick appearance, etc., it is preferable to employ a mold made of a silicone resin, or a metal or metal alloy.

[0067] 《Form and Use of Oily Cosmetics》 The oily cosmetics of the present disclosure may be in a liquid form (for example, cream-like) having a high viscosity, for example, a viscosity of 10,000 mPa·s or more, or a solid form, but the solid form can more effectively exhibit the effects of the present invention described above. There are no particular restrictions on the solid oily cosmetics, and examples thereof include stick-type and / or compact-type cosmetics. Among them, the oily cosmetics of the present disclosure can be suitably used as stick-type cosmetics. Here, the solid oily cosmetics can be intended to be, for example, oily cosmetics that exhibit a solid form at 30°C.

[0068] There are no particular restrictions on the uses of the oily cosmetics of the present disclosure, and examples thereof include lip cosmetics such as lipsticks, lip glosses, and lip creams; makeup cosmetics such as foundations and eyeshadows; and hair cosmetics such as hair sticks and pomades. Among them, it is advantageous that the cosmetics of the present disclosure are used as lipsticks that can visually easily feel the high-class feeling associated with the surface gloss of the appearance.

Example

[0069] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. Unless otherwise specified, the blending amounts are expressed in mass %.

[0070] 《Examples 1 to 7 and Comparative Examples 1 to 7》 The following evaluations were performed on the oil-based cosmetics obtained by the formulation shown in Table 1 and the production method shown below, and the results are shown in Tables 1 to 3. Here, the oil-based cosmetics in Examples 1 to 6 and Comparative Examples 1 to 6 are examples of stick-type oil-based cosmetics, and the oil-based cosmetics in Examples 7 and Comparative Example 7 are examples of plate-type oil-based cosmetics.

[0071] 〈Evaluation Method〉 (Evaluation of Viscosity) The viscosity of the cosmetic was evaluated using a B-type viscometer (TVB viscometer TVB-10, manufactured by Toki Sangyo Co., Ltd.) under the conditions of 90 °C, rotor number M2 or H7, and 20 rpm. Here, rotor H7 was adopted in Example 3, and rotor M2 was adopted in the other examples and comparative examples. Also, the viscosity of the cosmetic is intended to be the viscosity of the oil-based composition described below before injection into the mold.

[0072] (Evaluation of Flow Mark) The flow marks of the oil-based cosmetics prepared by the method described below were visually observed and evaluated according to the following criteria. Here, evaluations from A to C are considered qualified, and evaluation D can be regarded as unqualified: A: No uneven or streaky flow marks were confirmed. B: Very slight uneven or streaky flow marks were confirmed. C: Slight uneven or streaky flow marks were confirmed. D: Obvious uneven or streaky flow marks were confirmed.

[0073] (Evaluation of Surface Gloss) The surface gloss of the oily cosmetic prepared by the method described below was visually observed and evaluated according to the following criteria. Here, evaluations from A to C are considered qualified, and D evaluation can be regarded as unqualified: A: It had excellent surface gloss like that of a new car body. B: Slight dullness was felt compared to the surface gloss of A evaluation. C: Slight dullness was felt compared to the surface gloss of B evaluation. D: Dullness was felt compared to the surface gloss of C evaluation.

[0074] (Evaluation of uneven finish after application) The oily cosmetic prepared by the method described below was applied to the inner side of the arm, and its appearance was visually observed and evaluated according to the following criteria: A: No uneven finish was felt at all. B: Slight uneven finish was felt. C: Uneven finish was clearly felt.

[0075] 〈Manufacturing method of stick-type oily cosmetic〉 (Examples 1 to 6 and Comparative Examples 1 to 6) Using the formulations shown in Table 1, stick-type oily cosmetics of Examples 1 to 6 and Comparative Examples 1 to 6 were each manufactured by the method shown below.

[0076] All the materials were mixed, heated to 100 °C and melted, and then dispersed with a homodisper to prepare an oily composition.

[0077] The oily composition melted by heating to 90 °C was poured into a stick-shaped metal or silicone resin mold. After cooling to room temperature and confirming that it had solidified sufficiently, the cosmetic was taken out of the mold to obtain a stick-type oily cosmetic.

[0078]

Table 1

[0079]

Table 2

[0080] <Results> As is clear from the results of Examples 1 to 4 in Table 1, even in a formulation with a small amount of thickening particles, the cosmetic can be thickened at high temperatures. Also, when the viscosity of the cosmetic is 50 mPa·s or more, it was confirmed that the flow mark is reduced or suppressed. Further, as can be seen from the results of Comparative Example 1 and FIG. 1, even if the cosmetic had a flow mark, it was confirmed that it did not affect the uneven finish after application. That is, even if it was specified in various documents that the uneven finish after application was improved, it was found that it could not be said that the flow mark was necessarily improved as a result.

[0081] Further, as can be seen by comparing Examples 1 to 4 and Comparative Examples 1 to 4, when using a relatively small first fluorescent pigment with an average particle diameter of 80 μm or less, and setting the mass ratio of the first fluorescent pigment to a second fluorescent pigment larger than it; the mass ratio of the first fluorescent pigment to the coloring material; and the content of the thickening particles within a specific range, it was confirmed that the surface glossiness of the appearance of the cosmetic was also improved.

[0082] From the results of Comparative Example 5 in Table 2, it was confirmed that when the blending amount of the thickening particles is 4.0% by mass or more, the surface glossiness of the appearance of the cosmetic decreases.

[0083] From the results of Comparative Example 6 in Table 2, it was also found that when no thickener is used and the proportion of the second fluorescent pigment with an average particle diameter exceeding 80 μm increases, the surface glossiness of the appearance of the cosmetic decreases and the flow mark is likely to appear.

[0084] From the results of Examples 1 to 4 in Table 1 and the results of Examples 5 and 6 in Table 2, it was confirmed that various polymer-based oil-phase thickeners can exhibit the effect of reducing or suppressing the flow mark and the effect of improving the surface glossiness of the appearance of the cosmetic.

[0085] <Method for manufacturing a middle plate type oil-based cosmetic> (Example 7 and Comparative Example 7) Using the formulations shown in Table 3, the middle-dish type oil-based cosmetics of Example 7 and Comparative Example 7 were each manufactured by the method shown below.

[0086] All the materials were mixed, heated to 100°C and melted, and then dispersed with a homodisper to prepare an oil-based composition.

[0087] The oil-based composition heated and melted at 90°C was poured into a middle-dish-shaped metal container and cooled to room temperature to obtain a middle-dish type oil-based cosmetic.

[0088]

Table 3

[0089] 〈Results〉 As is clear from the results of Example 7 and Comparative Example 7, it was confirmed that the effect of reducing or suppressing flow marks and the effect of improving the surface glossiness of the cosmetic appearance in the present invention can be similarly exhibited not only in the stick type but also in a form such as the middle-dish type.

Claims

1. An oily cosmetic comprising a first phosphorescent pigment having an average particle diameter of 80 μm or less and a polymer-based oil-phase thickener, wherein the mass ratio of the first phosphorescent pigment to a second phosphorescent pigment having an average particle diameter exceeding 80 μm is 55:45 to 100:0, when a colorant is included, the mass ratio of the first phosphorescent pigment to the colorant is 2.0 or more, the content of thickening particles is less than 4.0% by mass, the polymer-based oil-phase thickener includes at least one selected from (styrene / isoprene) copolymers, (ethylene / propylene / styrene) copolymers, (styrene / butadiene) copolymers, (styrene / ethylene / butylene) copolymers, (styrene / propylene / butylene) copolymers, and (styrene / butylene) copolymers, and the viscosity at at least a part of the temperature of 80 to 150°C is 50 mPa·s or more. An oily cosmetic.

2. An oily cosmetic comprising a first phosphorescent pigment having an average particle diameter of 70 μm or less and a polymer-based oil-phase thickener, wherein the mass ratio of the first phosphorescent pigment to a second phosphorescent pigment having an average particle diameter exceeding 80 μm is 55:45 to 100:0, when a colorant is included, the mass ratio of the first phosphorescent pigment to the colorant is 2.0 or more, the content of the first phosphorescent pigment is 3.0% by mass or more, the content of thickening particles is less than 4.0% by mass, the polymer-based oil-phase thickener includes a copolymer having at least one selected from ethylene monomer units and styrene monomer units, and the viscosity at at least a part of the temperature of 80 to 150°C is 50 mPa·s or more. An oily cosmetic.

3. An oily cosmetic comprising a first phosphorescent pigment having an average particle diameter of 80 μm or less and a polymer-based oil-phase thickener, wherein the mass ratio of the first phosphorescent pigment to a second phosphorescent pigment having an average particle diameter exceeding 80 μm is 55:45 to 100:0, when a colorant is included, the mass ratio of the first phosphorescent pigment to the colorant is 2.0 or more, the content of the polymer-based oil-phase thickener is 20.00% by mass or more, the content of thickening particles is less than 4.0% by mass, the polymer-based oil-phase thickener includes a copolymer having at least one selected from ethylene monomer units and styrene monomer units, and the viscosity at at least a part of the temperature of 80 to 150°C is 50 mPa·s or more. An oily cosmetic.

4. The cosmetic according to claim 1 or 3, wherein the content of the first fluorescent pigment is 2.0% by mass or more.

5. The cosmetic according to any one of claims 1 to 4, further comprising a hydrocarbon oil.

6. The cosmetic according to any one of claims 1 to 5, comprising a coloring material, and wherein the first fluorescent pigment is a colorless or white fluorescent pigment.

7. The cosmetic according to any one of claims 1 to 6, which is used as a lipstick.

8. A method for producing a cosmetic according to any one of claims 1 to 7, comprising melting a raw material mixture containing the first fluorescent pigment and the polymer-based oil phase thickener at a temperature of 80 to 150 °C, at which temperature the viscosity of the mixture is 50 mPa·s or more, and injecting the mixture into a mold. The method for producing a cosmetic according to any one of claims 1 to 7.

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