Cosmetic composition

Abstract

Provided is a cosmetic composition including an oil and pigment particles incorporated in the oil, in which the pigment particles have improved dispersibility and which has an improved secondary adhesion-less effect.　The cosmetic composition comprises: pigment particles surface-treated with an ester compound of a C8-C20 fatty acid with glycerin; an oil including at least one silicone oil; and a silicone-based dispersant and / or an amodimethicone dispersant, the dispersants having an HLB value of 2.5-7.5.

Description

Cosmetic composition

[0001] The present invention relates to a cosmetic composition.

[0002] Known cosmetics containing pigment particles include makeup cosmetics such as makeup base, foundation, powder, blush, eye shadow, lipstick, eyeliner, and eyebrow pencil, and skin care cosmetics such as whitening cosmetics and UV care cosmetics.

[0003] Such cosmetics often contain pigment particles and oils. However, pigment particles that have not been surface-treated, especially pigment particles containing metal elements, can deteriorate other components of the cosmetics. For this reason, surface-treated pigment particles are often used.

[0004] For example, Patent Document 1 discloses a powder material for cosmetics that includes a powder for cosmetics that has been surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin.

[0005] Furthermore, Patent Document 2 discloses a cosmetic powder that is surface-treated with an ester compound of isostearic acid and diglycerin.

[0006] International Publication No. 2022 / 030462 Japanese Patent Application Laid-Open No. 2023-007281

[0007] When surface-treated pigment particles are dispersed in oil and blended into cosmetics such as foundation, poor dispersibility can lead to uneven color due to the surface-treated pigment particles. Therefore, the surface-treated pigment particles are required to have excellent dispersibility in oil.

[0008] On the other hand, when a cosmetic product such as a foundation containing such pigment particles is applied to the skin, the pigment particles contained therein may re-adhere from the skin to a mask, clothing, etc. (the so-called "secondary adhesion problem"), which must be taken into consideration.

[0009] Therefore, it is necessary to achieve both the dispersibility of surface-treated pigment particles in oil and the secondary adhesion-resistance effect.

[0010] The present invention aims to improve the above-mentioned circumstances, and its object is to provide a cosmetic composition in which pigment particles are blended in an oil component, which improves the dispersibility of the pigment particles while also improving the secondary adhesion-resistant effect.

[0011] The present invention that achieves the above object is as follows.

[0012] Aspect 1: A cosmetic composition comprising the following components: (A) pigment particles surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, (B) an oil component including at least one type of silicone oil, and (C) at least one of a silicone-based dispersant having an HLB value of 2.5 to 7.5 and an amodimethicone dispersant. Aspect 2: The cosmetic composition according to Aspect 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, caprylic / capric triglyceride, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. Aspect 3: The cosmetic composition according to Aspect 1 or 2, wherein the silicone-based dispersant comprises at least one selected from the group consisting of polyether-modified silicones and polyether alkyl-co-modified silicones. <Aspect 4> The cosmetic composition according to Aspect 3, wherein the polyether alkyl co-modified silicone is cetyl PEG / PPG-10 / 1 dimethicone. <Aspect 5> The cosmetic composition according to any one of Aspects 1 to 4, wherein the pigment particles comprise at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, and sericite. <Aspect 6> The cosmetic composition according to any one of Aspects 1 to 5, wherein the silicone oil accounts for 80 mass% or more of the total amount of the oil components. <Aspect 7> The cosmetic composition according to any one of Aspects 1 to 6, wherein the surface-treated pigment particles are 5.0 to 50 mass parts per 100 mass parts of the total of component (A), component (B), and component (C). <Aspect 8> The cosmetic composition according to any one of Aspects 1 to 7, wherein the oil content is 40 to 90 parts by mass per 100 parts by mass of the total of the components (A), (B), and (C). <Aspect 9> The cosmetic composition according to any one of Aspects 1 to 8, wherein the component (C) is 0.5 to 30 parts by mass per 100 parts by mass of the total of the components (A), (B), and (C).Aspect 10: The cosmetic composition according to any one of Aspects 1 to 9, wherein component (C) is 5.0 parts by mass or more per 100 parts by mass of component (A). Aspect 11: An oil-based cosmetic comprising the cosmetic composition according to any one of Aspects 1 to 10. Aspect 12: A water-in-oil emulsion cosmetic comprising the cosmetic composition according to any one of Aspects 1 to 10. Aspect 13: An oil-in-water emulsion cosmetic comprising the cosmetic composition according to any one of Aspects 1 to 10.

[0013] According to the present invention, it is possible to provide a cosmetic composition in which pigment particles are blended in an oil component, and which improves the dispersibility of the pigment particles while also improving the secondary adhesion-resistant effect.

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the preferred embodiments. However, the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the present invention.

[0015] <<Cosmetic Composition>> The cosmetic composition of the present invention (hereinafter also simply referred to as "the composition of the present invention") is a cosmetic composition comprising the following components: (A) pigment particles that have been surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, (B) an oil component including at least one type of silicone oil, and (C) at least one of a silicone-based dispersant having an HLB value of 2.5 or more and 7.5 or less and an amodimethicone dispersant.

[0016] The composition of the present invention can achieve both the dispersibility of pigment particles in oil and the secondary adhesion-resisting effect.

[0017] In the present invention, the "secondary adhesion-free effect" refers to, in contrast to the above-mentioned "secondary adhesion problem," the effect that even when a cosmetic containing pigment particles is applied to the skin and the mask or clothing comes into contact with the mask or clothing, the pigment particles contained therein are less likely to adhere to the mask or clothing, preferably no adhesion at all. The secondary adhesion-free effect can be evaluated, for example, by the method shown in the examples described below.

[0018] The present inventors have found that when cosmetic compositions containing surface-treated pigment particles have been adjusted in order to improve the secondary adhesion-resistant effect, the dispersibility of the surface-treated pigment particles in oil tends to become relatively poor. In other words, it is not easy to achieve both the dispersibility of the pigment particles in oil and the secondary adhesion-resistant effect in cosmetic compositions containing pigment particles.

[0019] Therefore, through further intensive research, the present inventors have found that the secondary adhesion-resistant effect can be ensured by adjusting the dispersibility of pigment particles in oil to an appropriate level, rather than simply improving it. More specifically, in the composition of the present invention, by blending a specific dispersant in a specific oil together with pigment particles surface-treated with the ester compound of the present invention, it is possible to achieve both the dispersibility of pigment particles in oil and the secondary adhesion-resistant effect.

[0020] Here, "adequate dispersibility" refers to dispersibility to the extent that color unevenness does not occur when a composition containing pigment particles surface-treated with the ester compound according to the present invention is blended into a cosmetic product such as a foundation and used. Furthermore, "adequate dispersibility" can be comprehensively determined using indicators of both the dispersibility immediately after the composition is prepared and the dispersibility over time. More specifically, in the evaluation of dispersibility, if the dispersibility is good immediately after preparation and also good over time, it can be determined to have "adequate dispersibility." In contrast, if the dispersibility is good immediately after preparation but becomes poor over time, for example, it is not evaluated as having "adequate dispersibility."

[0021] However, through extensive research by the present inventors, it has been found that this correspondence between "adequate dispersibility" and the secondary adhesion-free effect is applicable to pigment particles surface-treated with the ester compound according to the present invention, but is not applicable to pigment particles surface-treated with other surface treatment agents (e.g., Comparative Examples 4 and 7).

[0022] In addition, in the above-mentioned Patent Documents 1 and 2, it has been discovered that pigment particles are surface-treated with the ester compound according to the present invention in order to improve the dispersibility of the surface-treated pigment particles in oil. However, there is no idea of ​​improving the secondary adhesion-resistant effect of cosmetic compositions such as foundations containing pigment particles. Naturally, Patent Documents 1 and 2 do not focus on achieving both the dispersibility of pigment particles in oil and the secondary adhesion-resistant effect.

[0023] The composition of the present invention contains pigment particles surface-treated with the ester compound of the present invention (component (A)), an oil component containing at least one type of silicone oil (component (B)), and at least one type of silicone-based dispersant and amodimethicone dispersant having an HLB value of 2.5 or more and 7.5 or less (component (C)). These components are described in detail below.

[0024] [Component (A)] (Surface-treated pigment particles) In the present invention, the surface-treated pigment particles are those that have been surface-treated with the ester compound according to the present invention.

[0025] In the composition of the present invention, the content of the surface-treated pigment particles is not particularly limited. For example, the content of the surface-treated pigment particles may be 5.0 parts by mass or more, 6.0 parts by mass or more, 7.0 parts by mass or more, 8.0 parts by mass or more, 9.0 parts by mass or more, 10 parts by mass or more, 11 parts by mass or more, 12 parts by mass or more, 13 parts by mass or more, 14 parts by mass or more, 15 parts by mass or more, 16 parts by mass or more, 17 parts by mass or more, or more, based on 100 parts by mass of the total of the surface-treated pigment particles (component (A)), the oil component containing at least one type of silicone oil (component (B)), and at least one type of silicone-based dispersant and amodimethicone dispersant having an HLB value of 2.5 to 7.5 (component (C)). or more, 18 parts by mass or more, 19 parts by mass or more, 20 parts by mass or more, 21 parts by mass or more, 22 parts by mass or more, 22 parts by mass or more, 23 parts by mass or more, 24 parts by mass or more, 25 parts by mass or more, 26 parts by mass or more, 27 parts by mass or more, 28 parts by mass or more, 29 parts by mass or more, or 30 parts by mass or more, and may be 50 parts by mass or less, 45 parts by mass or less, 40 parts by mass or less, 39 parts by mass or less, 38 parts by mass or less, 37 parts by mass or less, 36 parts by mass or less, 35 parts by mass or less, 34 parts by mass or less, 33 parts by mass or less, 32 parts by mass or less, 31 parts by mass or less, or 30 parts by mass or less.

[0026] The ester compound according to the present invention is not particularly limited, and is preferably one that does not color or is unlikely to color the pigment particles that are the subject of surface treatment.

[0027] Specifically, the fatty acid having 8 to 20 carbon atoms in the ester compound according to the present invention may be, for example, a fatty acid having 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more carbon atoms, or a fatty acid having 20 or less, 19 or less, or 18 or less carbon atoms. Of these, fatty acids having 8 to 18 carbon atoms are preferred, and fatty acids having 12 to 18 carbon atoms are more preferred. Furthermore, such fatty acids may be branched or linear.

[0028] Furthermore, the glycerin in the ester compound according to the present invention may be unpolymerized (i.e., a monomer) monoglycerin or polymerized (i.e., a polymer) polyglycerin. When polyglycerin is used, its degree of polymerization is not particularly limited, but is preferably 2 or more and 10 or less. As the glycerin, monoglycerin, which is a monomer, diglycerin having a degree of polymerization of 2, or decaglycerin having a degree of polymerization of 10 is preferred.

[0029] The ester compound according to the present invention may contain, for example, at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, diglyceryl diisostearate, diglyceryl monoisostearate, caprylic / capric triglyceride, glyceryl triethylhexanoate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. Among these, for example, from the viewpoint of improving the lipophilicity of the surface-treated pigment particles and from the viewpoint of being a naturally-derived material, preferred ester compounds according to the present invention are, for example, diglyceryl tetraisostearate, diglyceryl triisostearate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

[0030] The method for surface treatment of pigment particles using the ester compound according to the present invention is not particularly limited, and for example, the "Method for producing powder materials for cosmetics" disclosed in Patent Document 1 may be referred to as appropriate.

[0031] In the present invention, any pigment particles can be used for the surface treatment, regardless of their shape (spherical, rod-like, needle-like, plate-like, irregular, scaly, spindle-like, etc.), particle size (aerosol-like, fine particles, pigment-grade, etc.), or particle structure (porous, non-porous, etc.). Examples of pigment particles that can be used for the surface treatment include, but are not limited to, inorganic pigment powders (including natural mineral pigments or synthetic inorganic pigments, etc.), organic dyes, and organic pigment particles.

[0032] More specifically, examples of inorganic pigments include, but are not limited to, titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, carbon black, red iron oxide, cerium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, magnesium oxide, zirconium oxide, kaolin, sericite, muscovite, phlogopite, synthetic mica, lepidolite, biotite, vermiculite, silica, calcium carbonate, magnesium carbonate, magnesium silicate, aluminum silicate, barium silicate, calcium silicate, barium sulfate, calcium sulfate, calcium phosphate, hydroxyapatite, boron nitride, pearl pigments, and bismuth oxychloride.

[0033] Examples of organic dyes include, but are not limited to, Red No. 3, Red No. 10, 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, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 205, Yellow No. 401, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange No. 206, Orange No. 207, Blue No. 1, Blue No. 2, Blue No. 201, Blue 404, Green No. 3, Green No. 201, Green No. 204, and Green No. 205.

[0034] Examples of organic pigment powders include, but are not limited to, tar pigments, nylon powder, cellulose powder, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, acrylic powder, and silicone powder.

[0035] These pigment particles can be used alone or in combination.

[0036] In the present invention, from the viewpoint of use in makeup cosmetics such as foundation, eye shadow, eyebrow, and blusher, among the above-mentioned examples, the pigment particles may contain at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, and sericite.

[0037] [Component (B)] (Oil) In the composition of the present invention, the oil comprises at least one type of silicone oil. Here, "silicone oil" refers to oils that can be used in cosmetics and have a main skeleton formed by siloxane bonds.

[0038] Through extensive research, the present inventors have found that pigment particles surface-treated with the ester compound according to the present invention can exhibit good dispersibility in an oil containing at least one type of silicone oil in the presence of a specific dispersant, which will be described later.

[0039] In the composition of the present invention, the content of the oil component is not particularly limited. For example, the content of the oil component may be 40 parts by mass or more, 42 parts by mass or more, 44 parts by mass or more, 46 parts by mass or more, 48 parts by mass or more, 50 parts by mass or more, 52 parts by mass or more, 54 parts by mass or more, 56 parts by mass or more, 58 parts by mass or more, relative to a total of 100 parts by mass of the surface-treated pigment particles (component (A)), the oil component containing at least one type of silicone oil (component (B)), and at least one type of silicone-based dispersant and amodimethicone dispersant having an HLB value of 2.5 to 7.5 (component (C)). parts by mass or more, 60 parts by mass or more, 62 parts by mass or more, 64 parts by mass or more, 66 parts by mass or more, 68 parts by mass or more, 70 parts by mass or more, 72 parts by mass or more, 74 parts by mass or more, 76 parts by mass or more, 78 parts by mass or more, 80 parts by mass or more, 82 parts by mass or more, 85 parts by mass or more, 86 parts by mass or more, or 88 parts by mass or more, and may be 90 parts by mass or less, 85 parts by mass or less, 80 parts by mass or less, 75 parts by mass or less, 70 parts by mass or less, 65 parts by mass or less, or 60 parts by mass or less.

[0040] Furthermore, from the viewpoint of dispersing the pigment particles surface-treated with the ester compound according to the present invention in the oil, the amount of the oil relative to 100 parts by mass of the above-described surface-treated pigment particles may be, for example, 150 parts by mass or more, 200 parts by mass or more, 250 parts by mass or more, 300 parts by mass or more, 350 parts by mass or more, 400 parts by mass or more, 450 parts by mass or more, 500 parts by mass or more, 550 parts by mass or more, 600 parts by mass or more, 650 parts by mass or more, 700 parts by mass or more, 750 parts by mass or more, 800 parts by mass or more, 850 parts by mass or more, 900 parts by mass or more, 950 parts by mass or more, or 1000 parts by mass or more, or may be 2000 parts by mass or less, 1800 parts by mass or less, 1500 parts by mass or less, 1200 parts by mass or less, 1000 parts by mass or less, 800 parts by mass or less, or 500 parts by mass or less.

[0041] In the present invention, the silicone oil may be an acyclic silicone oil (i.e., a chain silicone oil, for example, a linear silicone oil or a branched silicone oil) or a cyclic silicone oil. Of these, from the viewpoint of improving usability, for example, the acyclic silicone oil is preferred, and the linear silicone oil and the branched silicone oil are particularly preferred.

[0042] In the present invention, specific examples of silicone oils include, but are not limited to, linear silicone oils such as polydimethylsiloxane (also known as "dimethicone"), methylphenylpolysiloxane (also known as "diphenylsiloxyphenyltrimethicone"), and methylhydrogenpolysiloxane; cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; and mixtures of two or more thereof. Among polydimethylsiloxanes (dimethicones), for example, "dimethicone 1.5cs" and "dimethicone 2.0cs" may be used as volatile components, while "dimethicone 6cs" and "dimethicone 10cs" may be used as non-volatile components.

[0043] In the composition of the present invention, the oil content of the silicone oil relative to the total amount of oil may be, for example, 80% by mass or more, 81% by mass or more, 82% by mass or more, 83% by mass or more, 84% by mass or more, 85% by mass or more, 86% by mass or more, 87% by mass or more, 88% by mass or more, 89% by mass or more, 90% by mass or more, 91% by mass or more, 92% by mass or more, 93% by mass or more, 94% by mass or more, 95% by mass or more, 96% by mass or more, 97% by mass or more, 98% by mass or more, 99% by mass or more, or 100% by mass, or may be 100% by mass or less, 99% by mass or less, 98% by mass or less, 97% by mass or less, 96% by mass or less, or 95% by mass or less.

[0044] [Component C] (Dispersant) In the composition of the present invention, the dispersant is at least one of a silicone-based dispersant and an amodimethicone dispersant having an HLB value of 2.5 to 7.5 (hereinafter, also simply referred to as "the dispersant of the present invention"). That is, the dispersant of the present invention may be a silicone-based dispersant having an HLB value of 2.5 to 7.5, or may be an amodimethicone dispersant. By using the dispersant of the present invention, pigment particles surface-treated with the ester compound of the present invention can be dispersed in the above-mentioned oil, and further suitable dispersibility can be imparted. In addition, in the present invention, a "silicone-based dispersant" refers to a dispersant having a structure in which a hydrophilic substituent is introduced into a portion of a silicone having a siloxane bond in its main skeleton.

[0045] Here, the "HLB (Hydrophilic-Lipophilic Balance) value" is a value generally indicating the affinity of a surfactant to water and oil, and is a parameter known as the hydrophilic-lipophilic balance, which can be defined, for example, by the Griffin method. However, in the case of surfactants (including dispersants) having an oxypropylene structure, the HLB value can be defined by the Kawakami method.

[0046] More specifically, the HLB value of the dispersant according to the present invention may be 2.5 or more, 2.6 or more, 2.7 or more, 2.8 or more, 2.9 or more, 3.0 or more, 3.1 or more, 3.2 or more, 3.3 or more, 3.4 or more, 3.5 or more, 3.6 or more, 3.7 or more, 3.8 or more, 3.9 or more, 4.0 or more, 4.1 or more, 4.2 or more, 4.3 or more, 4.4 or more, 4.5 or more, 4.6 or more, 4.7 or more, 4.8 or more, 4.9 or more, or 5.0 or more, and may be 7.5 or less, 7.4 or less, 7.3 or less, 7.2 or less, 7.1 or less, or 5.0 or more. or less, 7.0 or less, 6.9 or less, 6.8 or less, 6.7 or less, 6.6 or less, 6.5 or less, 6.4 or less, 6.3 or less, 6.2 or less, 6.1 or less, 6.0 or less, 5.9 or less, 5.8 or less, 5.7 or less, 5.6 or less, 5.5 or less, 5.4 or less, 5.3 or less, 5.2 or less, 5.1 or less, 5.0 or less, 4.9 or less, 4.8 or less, 4.7 or less, 4.6 or less, 4.5 or less, 4.4 or less, 4.3 or less, 4.2 or less, 4.1 or less, 4.0 or less, 3.8 or less, 3.7 or less, 3.6 or less, or 3.5 or less.

[0047] The amodimethicone dispersant is also called an aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer dispersant, and for example, a compound represented by the following formula (1) is preferably used:

[0048] Here, the functional group equivalent of the compound of formula (1) may be 1000 or more, 1500 or more, or 2000 or more, and may be 3000 or less, 2200 or less, 2000 or less, or 1800 or less. The "functional group equivalent" refers to the value obtained by dividing the molecular weight of the compound of formula (1) by the number of amino groups contained in the molecule.

[0049] In formula (1), X is an alkyl group having 1 to 18 carbon atoms, R and R′ are alkyl groups having 1 to 6 carbon atoms, m is 20 to 2000, and n is 1 to 100.

[0050] In the present invention, the HLB value of the amodimethicone dispersant is not particularly limited, and may be, for example, within the HLB value range of the silicone-based dispersant (2.5 or more and 7.5 or less), or may be outside that range.

[0051] In the composition of the present invention, the content of the dispersant of the present invention is not particularly limited. For example, it may be 0.5 parts by mass or more, 1.0 parts by mass or more, 1.5 parts by mass or more, 2.0 parts by mass or more, 2.5 parts by mass or more, 3.0 parts by mass or more, 3.5 parts by mass or more, 4.0 parts by mass or more, 4.5 parts by mass or more, 5.0 parts by mass or more, 5.5 parts by mass or more, 6.0 parts by mass or more, 6.5 parts by mass or more, 7.0 parts by mass or more, 7.5 parts by mass or more, 8.0 parts by mass or more, 8.5 parts by mass or more, 9.0 parts by mass or more, 9.5 parts by mass or more, 10 parts by mass or more, or 11 parts by mass or more, or 30 parts by mass or less, 25 parts by mass or less, 20 parts by mass or less, 15 parts by mass or less, or 12 parts by mass or less, relative to 100 parts by mass of the total of the surface-treated pigment particles (component (A)), the oil component containing at least one type of silicone oil (component (B)), and the dispersant of the present invention (component (C)).

[0052] Furthermore, in the composition of the present invention, the amount of the dispersant of the present invention relative to 100 parts by mass of the pigment particles surface-treated with the above-described ester compound of the present invention may be, for example, 5.0 parts by mass or more, 8.0 parts by mass or more, 10 parts by mass or more, 11 parts by mass or more, 12 parts by mass or more, 13 parts by mass or more, 14 parts by mass or more, 15 parts by mass or more, 16 parts by mass or more, 17 parts by mass or more, 18 parts by mass or more, 19 parts by mass or more, 20 parts by mass or more, 25 parts by mass or more, 30 parts by mass or more, or 35 parts by mass or more, and may be 50 parts by mass or less, 45 parts by mass or less, 40 parts by mass or less, 35 parts by mass or less, 30 parts by mass or less, 25 parts by mass or less, or 20 parts by mass or less.

[0053] Specific examples of dispersants according to the present invention are not particularly limited, as long as they are silicone-based dispersants or amodimethicone dispersants with an HLB value of 2.5 or more and 7.5 or less. The silicone-based dispersant dispersant according to the present invention with an HLB value of 2.5 or more and 7.5 or less may contain, for example, at least one selected from the group consisting of polyether-modified silicones and polyether alkyl-co-modified silicones. More specifically, examples of polyether-modified silicones include, but are not limited to, PEG-9 polydimethylsiloxyethyl dimethicone (HLB value: 3.8). Furthermore, examples of polyether alkyl-co-modified silicones include, but are not limited to, cetyl PEG / PPG-10 / 1 dimethicone (HLB value: 3.5 or 5.0) and lauryl PEG-9 polydimethylsiloxyethyl dimethicone (HLB value: 2.8). According to one embodiment of the present invention, the polyether alkyl-co-modified silicone may be cetyl PEG / PPG-10 / 1 dimethicone. Cetyl PEG / PPG-10 / 1 dimethicone may have different HLB values ​​due to structural differences, i.e., cetyl PEG / PPG-10 / 1 dimethicone may have an HLB value of 3.5 or an HLB value of 5.0.

[0054] When two or more dispersants are used in the present invention, it is preferable that the HLB value of each dispersant is in the range of 2.5 or more and 7.5 or less.

[0055] Cosmetics The composition of the present invention described above can be incorporated into various cosmetics. That is, the present invention can provide an oil-based cosmetic comprising the composition of the present invention, a water-in-oil emulsion cosmetic comprising the composition of the present invention, and an oil-in-water emulsion cosmetic comprising the composition of the present invention.

[0056] The composition of the present invention can achieve both the dispersibility of pigment particles in oil and the secondary adhesion-free effect. Accordingly, these cosmetics containing the composition of the present invention can similarly achieve both the dispersibility of pigment particles in oil and the secondary adhesion-free effect.

[0057] In addition to the composition of the present invention, these cosmetics may contain various other ingredients as appropriate, provided that the effects of the present invention are not affected. The necessity and amount of other ingredients may be adjusted appropriately depending on the type of cosmetic.

[0058] Here, the various other components are not particularly limited and may be components that are typically incorporated into cosmetics, and examples thereof include water, surfactants other than the dispersant of the present invention described above, moisturizers, thickeners, gelling agents, stabilizers, water-soluble polymers, oil-soluble polymers, film-forming agents, higher fatty acids, sequestering agents, lower alcohols, higher alcohols, various extracts, sugars, amino acids, organic amines, polymer emulsions, chelating agents, UV absorbers other than the polar oils described above, pH adjusters, skin nutrients, vitamins, water-soluble agents applicable to pharmaceuticals, quasi-drugs, cosmetics, etc., buffers, anti-fading agents, preservatives, dispersants, propellants, powders other than the pigment particles of the present invention described above, and fragrances.

[0059] <Oil-Based Cosmetic> In the present invention, the oil-based cosmetic refers to a cosmetic that is a single-phase oil phase. Furthermore, the oil-based cosmetic is substantially free of water, which is usually present separately from the oil phase.

[0060] In the oily cosmetic of the present invention, the content of the composition of the present invention is not particularly limited and may be, for example, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, or 99% by mass or more, or may be 100% by mass or less, 99% by mass or less, 98% by mass or less, 97% by mass or less, 96% by mass or less, or 95% by mass or less.

[0061] In the oil-based cosmetic of the present invention, the content of the oil component containing the at least one type of silicone oil described above is not particularly limited, and may be, for example, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, or 30% by mass or more, relative to the entire oil-based cosmetic, and may also be 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, or 35% by mass or less.

[0062] In the oil-based cosmetic of the present invention, the content of the above-mentioned surface-treated pigment particles is not particularly limited, and may be, for example, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, 8.0% by mass or more, 9.0% by mass or more, 10.0% by mass or more, 11.0% by mass or more, 12.0% by mass or more, 13.0% by mass or more, 14.0% by mass or more, 15.0% by mass or more, 16.0% by mass or more, 17.0% by mass or more, 18.5% by mass or more, 19.0% by mass or more, 20.0% by mass or more, 21.0% by mass or more, 22.0% by mass or more, 23.0% by mass or more, 24.0% by mass or more, 25.0% by mass or more, 26.0% by mass or more, 27.0% by mass or more, 28.0% by mass or more, 29.0% by mass or more, 30.0% by mass or more, 31.0% by mass or more, 32.0% by mass or more, 33.0% by mass or more, 34.0% by mass or more, 35.0% by mass or more, 36.0% by mass or more It may be 0% by mass or more, 8.5% by mass or more, 9.0% by mass or more, 9.5% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, or 15% by mass or more, and 40% by mass or less, 3 It may be 8% by mass or less, 36% by mass or less, 34% by mass or less, 32% by mass or less, 30% by mass or less, 28% by mass or less, 26% by mass or less, 24% by mass or less, 22% by mass or less, 20% by mass or less, 18% by mass or less, or 16% by mass or less.

[0063] In the oil-based cosmetic of the present invention, the content of the dispersant according to the present invention described above is not particularly limited, and may be, for example, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, or 6.0% by mass or more, or may be 10% by mass or less, 9.5% by mass or less, 9.0% by mass or less, 8.5% by mass or less, 8.0% by mass or less, 7.5% by mass or less, 7.0% by mass or less, 6.5% by mass or less, 6.0% by mass or less, 5.5% by mass or less, 5.0% by mass or less, 4.5% by mass or less, 4.0% by mass or less, 3.5% by mass or less, or 3.0% by mass or less.

[0064] <Water-in-oil emulsion cosmetic> The water-in-oil emulsion cosmetic of the present invention may contain the composition of the present invention in its continuous phase (external phase).

[0065] In the water-in-oil emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited, and may be, for example, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more, or may be 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, or 55% by mass or less.

[0066] In the water-in-oil emulsion cosmetic of the present invention, the water content is not particularly limited and may be, for example, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, or 30% by mass or more, and may be 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, or 25% by mass or less.

[0067] In the water-in-oil emulsion cosmetic of the present invention, the content of the oil component containing the at least one type of silicone oil described above is not particularly limited, and may be, for example, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, or 30% by mass or more, relative to the entire water-in-oil emulsion cosmetic, and may be 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, or 35% by mass or less.

[0068] In the water-in-oil emulsion cosmetic of the present invention, the content of the above-described surface-treated pigment particles is not particularly limited, and may be, for example, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, 8.0% by mass or more, based on the total mass of the water-in-oil emulsion cosmetic. , 8.5% by mass or more, 9.0% by mass or more, 9.5% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, or 15% by mass or more, and 50% by mass or less, 48% by mass or less, 46% by mass or less, 44% by mass or less, It may be 42 mass% or less, 40 mass% or less, 38 mass% or less, 36 mass% or less, 34 mass% or less, 32 mass% or less, 30 mass% or less, 28 mass% or less, 26 mass% or less, 24 mass% or less, 22 mass% or less, 20 mass% or less, 18 mass% or less, or 16 mass% or less.

[0069] In the water-in-oil emulsion cosmetic of the present invention, the content of the dispersant according to the present invention described above is not particularly limited, and may be, for example, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, or 6.0 mass% or more, and 30 mass% or less, 25 mass% or less, 20 mass% or less, 15 mass% or less, 10 mass% or less, 9.5 mass% or less, 9.0 mass% or less, 8.5 mass% or less, 8.0 mass% or less, 7 .5% by weight or less, 7.0% by weight or less, 6.5% by weight or less, 6.0% by weight or less, 5.5% by weight or less, 5.0% by weight or less, 4.5% by weight or less, 4.0% by weight or less, 3.5% by weight or less, or 3.0% by weight or less.

[0070] In the water-in-oil emulsion cosmetic of the present invention, the dispersant according to the present invention may function as an emulsifier, and in order to maintain emulsion stability, the cosmetic may contain an emulsifier other than the dispersant described above.

[0071] <Oil-in-water emulsion cosmetic> The oil-in-water emulsion cosmetic of the present invention may contain the composition of the present invention in its dispersed phase (internal phase).

[0072] In the oil-in-water emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited, and may be, for example, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, or 70% by mass or more, or may be 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, or 45% by mass or less.

[0073] Furthermore, in the oil-in-water emulsion cosmetic of the present invention, the water content is not particularly limited and may be, for example, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, or 85% by mass or more, or may be 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, or 55% by mass or less.

[0074] In the oil-in-water emulsion cosmetic of the present invention, the content of the oil component containing the at least one type of silicone oil described above is not particularly limited, and may be, for example, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, or 30% by mass or more, relative to the entire oil-in-water emulsion cosmetic, and may be 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, or 35% by mass or less.

[0075] In the oil-in-water emulsion cosmetic of the present invention, the content of the above-described surface-treated pigment particles is not particularly limited, and may be, for example, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, or Above, 8.0% by mass or more, 8.5% by mass or more, 9.0% by mass or more, 9.5% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, or 15% by mass or more, and 40% by mass or less , 38% by mass or less, 36% by mass or less, 34% by mass or less, 32% by mass or less, 30% by mass or less, 28% by mass or less, 26% by mass or less, 24% by mass or less, 22% by mass or less, 20% by mass or less, 18% by mass or less, or 16% by mass or less.

[0076] In the oil-in-water emulsion cosmetic of the present invention, the content of the dispersant according to the present invention described above is not particularly limited, and may be, for example, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, or 6.0% by mass or more, or may be 20% by mass or less, 15% by mass or less, 10% by mass or less, 9.5% by mass or less, 9.0% by mass or less, 8.5% by mass or less, 8.0% by mass or less, 7.5% by mass or less, 7.0% by mass or less, 6.5% by mass or less, 6.0% by mass or less, 5.5% by mass or less, 5.0% by mass or less, 4.5% by mass or less, 4.0% by mass or less, 3.5% by mass or less, or 3.0% by mass or less.

[0077] The oil-in-water emulsion cosmetic of the present invention may contain an emulsifier other than the dispersant of the present invention.

[0078] <Form> Examples of the form of the cosmetic containing the composition of the present invention include, but are not limited to, solid, semi-solid, solid paste, stick, emulsion, liquid, gel, sherbet, cream, ointment, or paste.

[0079] <Applications> Examples of applications of cosmetics containing the composition of the present invention include, but are not limited to, foundation, blush, eyebrow, eye shadow, eyeliner, mascara, lipstick, makeup base, concealer, eye cream, and lip balm.

[0080] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. In the following, unless otherwise specified, the contents are expressed in mass %.

[0081] Examples and Comparative Examples Water-in-oil emulsion cosmetics of Examples and Comparative Examples were prepared according to the formulations shown in Table 1 below, and the dispersibility immediately after preparation, dispersibility over time, and secondary adhesion prevention effect of each obtained cosmetic were evaluated according to the following criteria. The results are shown in Table 1.

[0082] Dispersibility Immediately After Preparation The dispersibility of the cosmetics obtained in the Examples and Comparative Examples immediately after preparation was evaluated by visual inspection. The evaluation criteria are as follows: "A": No color unevenness was observed on the liquid surface; "B": Almost no color unevenness was observed on the liquid surface; "C": Color unevenness was observed on about half of the liquid surface; "D": Color unevenness was observed on more than half of the liquid surface.

[0083] The less (or less) "color unevenness" on the liquid surface, the better the dispersibility. The same applies to the "dispersibility over time" below.

[0084] <<Dispersibility over Time>> A rolling test was carried out to evaluate the dispersibility over time of each of the cosmetics obtained in the Examples and Comparative Examples.

[0085] More specifically, in the rolling test, each prepared cosmetic was filled into a cylindrical container and subjected to a rolling tester at room temperature at a speed of 45 rpm for 4 hours, and changes in the state of the cosmetic were observed. The evaluation criteria are as follows: "A": No change in the appearance of the cosmetic was observed; "B": A slight color change was observed in the cosmetic, but this did not interfere with use; "C": A color change was observed in the cosmetic, to the extent that it interfered with use; "D": A significant color change and aggregation was observed in the cosmetic, to the extent that it was difficult to use.

[0086] <Secondary Adhesion Resistance Effect> 5 mg of each of the cosmetics obtained in the Examples and Comparative Examples was applied to artificial leather and left to stand at 37°C for 5 minutes. Next, the applied area was tapped twice onto filter paper using a tapping tester to transfer the cosmetic. The amount of each cosmetic transferred to the filter paper was visually evaluated according to the following criteria: "A": No transfer to the filter paper was observed; "B": Almost no transfer to the filter paper was observed; "C": Light transfer to the filter paper was observed; "D": Heavy transfer to the filter paper was observed.

[0087]

[0088]

[0089] As is clear from the results in Table 1, all of the cosmetics of Examples 1 to 4 had good dispersibility (both immediately after application and over time) and also had a high secondary adhesion-resistant effect. In other words, it was suggested that the cosmetics of Examples 1 to 7 were able to achieve both the dispersibility of the surface-treated pigment particles in oil and the secondary adhesion-resistant effect.

[0090] In contrast, in the cosmetics of Comparative Examples 1 and 2, pigment particles that had been surface-treated with polyglyceryl-2 tetraisostearate (a type of ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin), as in Examples 1 to 3, were used, but it was found that the surface-treated pigment particles were unable to achieve both the dispersibility in oil and the secondary adhesion-resistant effect.

[0091] More specifically, the cosmetic of Comparative Example 1 had good dispersibility immediately after preparation, but its dispersibility deteriorated over time, and the secondary adhesion prevention effect was also poor. This result is presumably due to the use of a silicone-based dispersant with an HLB value of 2.0 in the cosmetic of Comparative Example 1.

[0092] Furthermore, in the cosmetic of Comparative Example 2, the blended amount of dispersant was increased, but the same tendency as in Comparative Example 1 was obtained. That is, in the cosmetic of Comparative Example 2, dispersibility was good immediately after preparation, but dispersibility deteriorated over time, and the secondary adhesion resistance effect was also poor. It is presumed that this result is due to the use of a silicone-based dispersant with an HLB value of 2.0 in the cosmetic of Comparative Example 2.

[0093] On the other hand, in the cosmetic of Comparative Example 3, no dispersant was used, and as a result, although the secondary adhesion prevention effect was high, it was found that the dispersibility immediately after preparation and the dispersibility over time were poor.

[0094] The cosmetic of Comparative Example 4 contained the same oil and dispersant as in Example 1, but contained pigment particles that had been surface-treated with a different surface treatment agent than in Example 1. As a result, it was found that the dispersibility immediately after preparation and the dispersibility over time were good, but the secondary adhesion-resistance effect was poor.

[0095] The cosmetics of Comparative Examples 5 and 6 contained the same oil and dispersant as those in Example 1, but contained pigment particles that had been surface-treated with a different surface treatment agent than those in Example 1. As a result, the dispersibility immediately after preparation and the dispersibility over time were poor, and therefore the secondary adhesion-resistant effect could not be evaluated.

[0096] The cosmetic of Comparative Example 7 contained the same oil as in Example 1, but contained pigment particles that had been surface-treated with a different surface treatment agent and a different dispersant than in Example 1. It was found that the cosmetic had good dispersibility immediately after preparation, but that the dispersibility over time and the secondary adhesion-resistant effect were inferior.

[0097] In the cosmetic of Comparative Example 8, isostearic acid (non-silicone dispersant) with an HLB value of 4.3 was used as the dispersant, but the dispersibility immediately after preparation and over time was poor, and therefore the secondary adhesion-resistant effect could not be evaluated.

[0098] <Formulation Examples> Formulation examples of the composition of the present invention are given below, but the present invention is not limited to the following formulation examples.

[0099] Formulation Example 1: Oil-in-water foundation

[0100] Formulation Example 2: Oily solid lipstick

[0101] Formulation Example 3: Oil-based mascara

[0102] Formulation Example 4: Oil-in-water concealer

Claims

1. The following components: (A) Pigment particles surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, (B) An oil component containing at least one type of silicone oil, and (C) At least one selected from a silicone-based dispersant having an HLB value of 2.5 or more and 7.5 or less and an amodimethicone dispersant. A cosmetic composition.

2. The cosmetic composition according to claim 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, glyceryl tri (caprylate / caprate), glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

3. The cosmetic composition according to claim 1 or 2, wherein the silicone-based dispersant contains at least one selected from the group consisting of polyether-modified silicone and polyether-alkyl co-modified silicone.

4. The cosmetic composition according to claim 3, wherein the polyether-alkyl co-modified silicone is cetyl PEG / PPG-10 / 1 dimethicone.

5. The cosmetic composition according to any one of claims 1 to 4, wherein the pigment particles contain at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, and sericite.

6. The cosmetic composition according to any one of claims 1 to 5, wherein the silicone oil is 80% by mass or more in the total amount of the oil component.

7. The cosmetic composition according to any one of claims 1 to 6, wherein the surface-treated pigment particles are 5.0 to 50 parts by mass with respect to a total of 100 parts by mass of the component (A), the component (B), and the component (C).

8. The cosmetic composition according to any one of claims 1 to 7, wherein the oil component is 40 to 90 parts by mass with respect to a total of 100 parts by mass of the component (A), the component (B), and the component (C).

9. The cosmetic composition according to any one of claims 1 to 8, wherein the component (C) is 0.5 to 30 parts by mass with respect to a total of 100 parts by mass of the component (A), the component (B), and the component (C).

10. The cosmetic composition according to any one of claims 1 to 9, wherein the component (C) is 5.0 parts by mass or more with respect to 100 parts by mass of the component (A).

11. An oil-based cosmetic containing the cosmetic composition according to any one of claims 1 to 10.

12. An oil-in-water emulsion cosmetic containing the cosmetic composition according to any one of claims 1 to 10.

13. A water-in-oil emulsion cosmetic containing the cosmetic composition according to any one of claims 1 to 10.

Images