Powder dispersion composition and cosmetic composition using the same

Abstract

The purpose of the present invention is to provide a powder dispersion composition in which the powder has high dispersibility and a cosmetic which has excellent usability and satisfactory long-term stability due to the use of the powder dispersion composition. This powder dispersion composition comprises (A) a powder, (B) an oil, and (C) a polyglyceryl polyricinoleate, and is characterized in that the oil (B) comprises (b1) a polar oil and (b2) one or more volatile oils, the polar oil (b1) accounting for 35-80 mass% of the whole oil (B) and 20 mass% or more of the volatile oils (b2) being accounted for by a volatile hydrocarbon oil, and that the polyglyceryl polyricinoleate (C) is contained in an amount of 0.5-10 mass% with respect to the whole powder dispersion composition.

Description

Technical Field

[0001] The present invention relates to a powder dispersion composition having high powder dispersibility and a cosmetic having excellent usability and good stability over time by using the same.

Background Art

[0002] Although powders such as titanium oxide, zinc oxide, iron oxide and the like, and powders such as mica and sericite are widely used in cosmetics, they have high cohesiveness and it is difficult to maintain stability over time in cosmetics. Therefore, various studies have been made to uniformly disperse them in products. For example, Patent Document 1 discloses an oil-based dispersion composition using polyglycerol-modified silicone and / or alkylpolyglycerol co-modified silicone as a dispersant for uniformly dispersing powders, and a cosmetic containing the same. Further, Patent Documents ② and ③ disclose a powder dispersion composition in which powders are dispersed in an oil agent using a powder dispersant composed of a specific polyglycerol fatty acid ester, and a cosmetic containing the same.

[0003] However, when both volatile oil and polar oil are present in the oil component, the powder tends to aggregate and it becomes difficult to disperse it sufficiently. On the other hand, if a large amount of a dispersant is blended to avoid powder aggregation, stickiness may occur and usability may be impaired. In particular, this problem tends to be prominent when the ratio of silicone oil in the volatile oil is high.

[0004] Therefore, there is still a need for a powder dispersion composition that can stably disperse powders even when both volatile oil and polar oil are present as the oil component, and that is excellent in usability without stickiness when used in cosmetics.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] This invention has been made in view of the above circumstances, and aims to provide a powder dispersion composition having high powder dispersibility, and a cosmetic composition that has excellent usability and good stability over time when using the same. [Means for solving the problem]

[0007] The inventors of the present invention conducted intensive research to solve the above problems and, as a result, discovered that by using polyglyceryl polyricinoleate as a dispersant and adjusting the ratio of polar oils in the oil component and the ratio of volatile hydrocarbon oils in the volatile oil component to a predetermined range, it is possible to realize a powder dispersion composition that exhibits high dispersibility, is less likely to become sticky, and has excellent usability, thus completing the present invention.

[0008] In other words, the present invention is A powder dispersion composition comprising (A) powder, (B) oil, and (C) polyglyceryl polyricinoleate, (B) The oil content includes (b1) polar oil and (b2) volatile oil, (b1) Polar oils account for 35-80% by mass of the total oil content (B). (b2) At least 20% by mass of the volatile oil is volatile hydrocarbon oil, (C) The essence of this invention is a powder dispersion composition in which polyglyceryl polyricinoleate is present in an amount of 0.5 to 10% by mass relative to the total amount of the powder dispersion composition, and a cosmetic composition using this powder dispersion composition. [Effects of the Invention]

[0009] The powder dispersion composition according to the present invention, by having the above configuration, can achieve high powder dispersibility despite containing both volatile oils and polar oils in the oil component. Furthermore, since there is no need to incorporate a large amount of dispersant, it does not become sticky and its usability is not impaired. Furthermore, cosmetics using this powder dispersion composition exhibit good long-term stability and offer excellent usability. [Modes for carrying out the invention]

[0010] The powder dispersion composition of the present invention comprises (A) powder, (B) oil, and (C) polyglyceryl polyricinoleate in a predetermined blending ratio, characterized in that (B) oil has a predetermined composition. This is described in detail below.

[0011] <(A) Powder> (A) The powder may be any powder component commonly used in cosmetics, etc., and is not particularly limited. For example, inorganic powders such as talc, kaolin, mica, silica, and zeolite; organic powders such as polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, polytetrafluoroethylene powder, and cellulose powder; silicone powders such as trimethylsilsesquioxane powder; inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); inorganic yellow pigments such as yellow iron oxide and yellow ochre; inorganic black pigments such as black iron oxide and carbon black; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; inorganic blue pigments such as ultramarine and Prussian blue; titanium dioxide coated mica, Pearl pigments such as colored titanium oxide coated mica, bismuth oxychloride, and fish scale foil; metal powder pigments such as aluminum powder and copper powder; organic pigments such as zirconium, barium, or aluminum lake, including Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1; and processed powders of these are included. Processing agents include, but are not limited to, silicones, fluoride compounds, and higher fatty acids.

[0012] Furthermore, in order to provide UV protection, (A) powder may contain a powder that physically blocks ultraviolet rays by reflection and scattering (UV scattering agent). Specific examples of UV scattering agents include titanium dioxide, zinc oxide, cerium oxide, barium sulfate, iron oxide, talc, mica, sericite, kaolin, titanium mica, Prussian blue, chromium oxide, chromium hydroxide, silica, cerium oxide, etc.

[0013] The lower limit of the amount of powder (A) in the powder dispersion composition of the present invention is 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 15% by mass or more, relative to the total amount of the powder dispersion composition. The upper limit of the amount of powder (A) is 50% by mass or less, more preferably 40% by mass or less, and particularly preferably 30% by mass or less. If the amount of powder (A) is less than 5% by mass, the effect of the powder formulation may not be sufficiently obtained, and if it exceeds 50% by mass, the dispersibility and feel may deteriorate.

[0014] <(B) Oil> (B) Oils refer to all oils used in cosmetics, and (B) oils must include (b1) polar oils and (b2) volatile oils as part of (B) oils. The following will be explained in the order of (b1) polar oils, (b2) volatile oils, and other oils.

[0015] <(b1) Polar oil> (b1) The polar oil is preferably one with an IOB value in the range of 0.1 to 0.8, and more preferably one with an IOB value in the range of 0.15 to 0.6. Here, the IOB value is the ratio of the inorganic value (IV) to the organic value (OV) in the organic conceptual diagram (Inorganic Organic Balance), and is referred to as "Inorganic value (IV) / Organic value (OV)".

[0016] The Organic Concept Diagram was proposed by Fujita Akira, and its details are described in "Pharmaceutical Bulletin", vol. 2, 2, pp. 163-173 (1954), "The Field of Chemistry", vol. 11, 10, pp. 719-725 (1957), "Fragrance Journal", vol. 50, pp. 79-82 (1981), etc. That is, taking methane (CH4) as the origin of all organic compounds, all other compounds are regarded as derivatives of methane, and certain numerical values are set for their carbon number, substituents, bonding modes (differences in single bonds, double bonds, and triple bonds), rings, etc. Then, by adding up the scores, organic values and inorganic values are obtained, and they are plotted on a graph with the organic value on the X-axis and the inorganic value on the Y-axis. The Organic Concept Diagram is also shown in "Organic Concept Diagram - Basics and Applications -" (written by Yoshio Koda, Sankyo Publishing, 1984), etc.

[0017] (b1) Typical examples of polar oils include ester oils, oil-soluble ultraviolet absorbers, and ether oils. Specific examples of ester oils are not particularly limited, but include diisopropyl sebacate, pentaerythrityl tetraethylhexanoate, cetyl ethylhexanoate, di(phytosteryl / octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, triethylhexanoin, ethylhexyl isononanoate, ethylhexyl ethylhexanoate, ethylhexyl salicylate, propylene glycol dicaprate, isopropyl palmitate, phytosteryl macadamia nut fatty acid, polyglyceryl-2 tetraisostearate, ethylhexyl palmitate, myristyl myristate, isopropyl myristate, octyldodecyl myristate, decyl oleate, isodecyl neopentanoate, alkyl (C12-15) benzoate, tripropylene glycol dineopentanoate, etc.

[0018] In addition, examples of the oil-soluble ultraviolet absorber include methoxycinnamic acid derivatives, salicylic acid derivatives, benzoyl derivatives, camphor derivatives, para-aminobenzoic acid derivatives, triazine derivatives, benzophenone derivatives, and polysilicon-based ultraviolet absorbers. More specifically, 2-ethylhexyl paramethoxycinnamate, oxybenzone, 4-t-butyl-4'-methoxydibenzoylmethane, octyltriazine, bis-ethylhexyloxyphenol methoxyphenyltriazine, dioctylbutamidotriazine, diethylamino hydroxybenzoyl benzoic acid hexyl, octocrylene, polysilicon-15, octyl salicylate, homomethyl salicylate, p-methylbenzylidene camphor, and the like can be mentioned. Furthermore, as the ether oil, polyoxyalkylene-based ether oil is preferable, and examples thereof include polypropylene glycol, polyoxypropylene butyl ether, and the like.

[0019] In the powder dispersion composition according to the present invention, the blending amount of the (b1) polar oil is 35 to 80% by mass with respect to the total amount of the (B) oil component. The lower limit is 35% by mass or more, more preferably 50% by mass or more, and particularly preferably 60% by mass or more. The upper limit is 80% by mass or less, more preferably 75% by mass or less, and particularly preferably 70% by mass or less. If the blending amount of the (b1) polar oil is less than 35% by mass of the total amount of the (B) oil component, a smooth feeling in use may not be obtained, and if it exceeds 80% by mass, stickiness may occur and elongation may deteriorate.

[0020] <(b2) Volatile oil> (b2) The volatile oil means an oil component having a boiling point in the range of 60 to 260°C at normal pressure (1 atm). Examples of the volatile oil used in the present invention include volatile hydrocarbon oils and silicone oils, etc., and volatile hydrocarbon oils are essentially included. As the volatile hydrocarbon oil, either linear or branched ones may be used. Specifically, C8 - C16 isoalkanes (also known as isoparaffins) such as isodecane, isododecane, isohexadecane, hydrogenated polyisobutene, etc. are exemplified. Examples of volatile silicone oils include cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetramethyltetrahydrogencyclotetrasiloxane; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; and caprylyl methicone. In the powder dispersion composition according to the present invention, the amount of (b2) volatile oil blended is preferably 20% by mass or more, more preferably 25% by mass or more, and most preferably 30% by mass or more, relative to the total amount of (B) oil. Furthermore, it is preferably 65% ​​by mass or less, more preferably 60% by mass or less, and most preferably 50% by mass or less.

[0021] (b2) The amount of volatile hydrocarbon oil in the volatile oil is 20% by mass or more, more preferably 30% by mass or more, and particularly preferably 50% by mass or more. The upper limit of the amount is not particularly limited, but is preferably 90% by mass or less, more preferably 80% by mass or less, and particularly preferably 70% by mass or less. If the amount of volatile hydrocarbon oil is less than 20% by mass of the total amount of volatile oil (b2), the powder dispersibility tends to be poor.

[0022] <Other oils> (B) Among the oils, other than (b1) polar oils and (b2) volatile oils, there are no particular limitations, but examples include non-volatile hydrocarbon oils such as squalane, hydrogenated polydecene, and petrolatum, and non-volatile silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane, which are liquid at room temperature (25°C).

[0023] The lower limit of the amount of (B) oil in the powder dispersion composition of the present invention is 55% by mass or more, more preferably 60% by mass or more, and particularly preferably 70% by mass or more, based on the total amount of the powder dispersion composition. If the amount of (B) oil is less than 55% by mass, sufficient stability may not be obtained. Furthermore, the upper limit of the amount of (B) oil is not particularly limited, but is preferably 95% by mass or less, more preferably 90% by mass or less, and particularly preferably 85% by mass or less.

[0024] <(C) Polyglyceryl polyricinoleate> The (C) polyglyceryl polyricinoleate incorporated into the powder dispersion composition of the present invention is an ester of a condensate (condensed ricinoleic acid) formed by esterification of ricinoleic acid, a higher fatty acid with 18 carbon atoms, and polyglycerin with an average degree of polymerization of 2 to 10. A typical example is polyglyceryl-6 polyricinoleate. (C) Component can be a commercially available product, and preferred commercially available products include, for example, NIKKOL Decaglyn PR-20 (Nikko Chemicals Co., Ltd.), SY Glister CR-310, CR-500, CRS-75 (all from Sakamoto Pharmaceutical Co., Ltd.).

[0025] The amount of component (C) in the powder dispersion composition of the present invention is 0.5 to 10% by mass relative to the total amount of the powder dispersion composition. The lower limit is 0.5% by mass or more, more preferably 2% by mass or more, and particularly preferably 3% by mass or more. The upper limit is 10% by mass or less, more preferably 6% by mass or less, and particularly preferably 4% by mass or less. If the amount of component (C) is less than 0.5% by mass, the powder dispersibility tends to be poor. Furthermore, if the amount of component (C) exceeds 10% by mass, when the powder dispersion composition is used as a cosmetic, it may become sticky or difficult to spread, resulting in poor usability.

[0026] <Optional ingredients> The powder dispersion composition of the present invention is an oily dispersion obtained by mainly dispersing powder in an oil, and in addition to the above components (A) to (C), it may contain various components that are normally incorporated into oily cosmetics, such as gelling agents, antioxidants, and preservatives, to the extent that they do not impair the effects of the present invention, depending on the purpose.

[0027] The method for producing the powder dispersion composition of the present invention is not particularly limited, but for example, it can be obtained by mixing component (B) and component (C), adding component (A) to the mixture, and uniformly dispersing it. Examples of equipment for uniform dispersion in this case include a disperser mixer, homomixer, ball mill, bead mill, etc.

[0028] <Cosmetics> The powder dispersion composition of the present invention can be used as is as an oil-based cosmetic. Alternatively, it can be emulsified with an aqueous phase component using a known method to create an emulsified cosmetic in which the powder dispersion composition is the oil phase. Since the cosmetic composition of the present invention is the above-mentioned powder dispersion composition itself, or a composition containing it, it has excellent powder dispersibility and usability.

[0029] The cosmetic composition of the present invention may contain ingredients commonly used in cosmetics, such as water, alcohols, water-soluble polymers, surfactants, fragrances, salts, antioxidants, pH adjusters, chelating agents, colorants, cosmetic ingredients, etc., to the extent that they do not interfere with the effects of the present invention. The cosmetic composition of the present invention can be widely applied not only to sunscreen cosmetics, but also to makeup products, hair products, and the like. [Examples]

[0030] The present invention will be further described below with reference to examples, but the present invention is not limited thereto. Unless otherwise specified, the amount of each component is expressed as a mass % of the system in which it is incorporated.

[0031] <Example 1 and Comparative Examples 1-7> Powder dispersion compositions having the compositions listed in Table 1 below were prepared using various dispersants, and their powder dispersibility was investigated using the method described later.

[0032] [Table 1] *1 "WOGEL-18DV" Matsumoto Pharmaceutical Co., Ltd. *2 "Estemol 182V" Nisshin Oillio Group Co., Ltd. *3 "KF-6109" Shin-Etsu Chemical Co., Ltd. *4 "S-Face SCIS-101" Sakamoto Pharmaceutical Co., Ltd. *5 "ABIL EM90" EVONIC Corporation *6 "Silicon SC9450N" Shin-Etsu Chemical Co., Ltd. *7 "KF-8004" Shin-Etsu Chemical Co., Ltd. *8 "SY Glister CRS-75" Sakamoto Pharmaceutical Co., Ltd.

[0033] <Powder dispersibility> Each prepared powder dispersion composition was placed in the sample input section of a stress-controlled rheometer (manufactured by Aton Paar), and a shear rate of 0.1S was measured using a cone-plate type jig CP50-1. -1 From 1000S -1 The shear stress was measured in the following relationship: [Shear viscosity] = [Shear stress] / [Shear rate] The shear viscosity was determined using [a specific method], and a flow curve representing the relationship between shear viscosity and shear rate was obtained. In the obtained flow curve, 10S -1 and 1000S -1 The viscosity decay rate was calculated using the viscosity values ​​η(10 / S) and η(1000 / S) in the following relationship.

number

[0034] As shown in Table 1, it was confirmed that when polyglyceryl-6 polyricinoleate is incorporated, the powder dispersibility is particularly superior compared to various dispersants widely used in cosmetics.

[0035] <Examples 2-4 and Comparative Examples 8-9> Powder dispersion compositions having the compositions listed in Table 2 below were prepared by varying the blending ratio of polyglyceryl-6 polyricinoleate, and their powder dispersibility was evaluated. Furthermore, we investigated its usability using the following methods.

[0036] <Usability> The usability (smoothness, lack of squeaky feeling) of each prepared powder dispersion composition when applied to the skin was evaluated using the following method. Twenty cosmetic evaluation panel members were asked to use the powder dispersion compositions and evaluate their usability on a 5-point scale according to the following criteria. Each powder dispersion composition was assigned a score, and the average score from all panel members was then determined according to the following 4-point evaluation criteria. (Evaluation Criteria) Evaluation result: Score Very good: 5 points Good: 4 points Average: 3 points Slightly poor: 2 points Defective: 1 point (Judgment criteria) Judgment: Average score A: 4.5 or higher B: 3.5 or higher and less than 4.5 C: 1.5 or higher and less than 3.5 D: Less than 1.5

[0037] [Table 2]

[0038] As shown in Table 2, it was confirmed that the powder dispersibility was excellent when 0.5% by mass or more of polyglyceryl-6 polyricinoleate was included. On the other hand, although not shown in the table, when more than 10% by mass of polyglyceryl-6 polyricinoleate was added, the powder dispersibility was good, but stickiness occurred, resulting in poor usability.

[0039] <Examples 5-9 and Comparative Examples 10-16> Powder dispersion compositions having the compositions shown in Tables 3 and 4 below were prepared by varying the blending ratio of volatile hydrocarbon oil (isododecane), volatile silicone oil (dimethylpolysiloxane), and polar oil (isopropyl myristate) in the oil component, and their powder dispersibility and usability were investigated in the same manner as described above.

[0040] [Table 3]

[0041] [Table 4]

[0042] As shown in Tables 3 and 4, it was confirmed that when polar oil accounts for 35-80% by mass of the total oil content, and 20% or more by mass of volatile oil is volatile hydrocarbon oil, the powder exhibits excellent dispersibility and usability. On the other hand, it was observed that if either the amount of polar oil in the total oil content or the amount of volatile hydrocarbon oil in the volatile oil content fell outside the above range, the powder dispersibility and usability tended to deteriorate.

[0043] The following are examples of formulations for the cosmetic composition of the present invention. It goes without saying that the present invention is not limited in any way by these formulation examples, but is specified by the claims. All amounts are expressed as mass % of the total amount of the cosmetic composition.

[0044] Prescription example 1: Sunscreen (Ingredient name) Compounding amount (mass%) (1) Isododecane 10.0 (2) Dimethylpolysiloxane (1.5 cs) 15.0 (3) Isopropyl myristate 18.7 (4) Octocrylene 5.0 (5) Ethylhexyl salicylate 5.0 (6) PEG-9 Polydimethylsiloxyethyl Dimethicone 1.5 (7) Polyglyceryl-6 polyricinoleate 2.0 (8) Disteardimonium hectorite 0.3 (9) Titanium dioxide 2.0 (10) Zinc oxide 11.0 (11) Talc 7.0 (12) Purified water remainder (13) EDTA-3Na 0.1 (14) Ethanol 6.0 (15) Glycerin 1.0

Claims

1. A powder dispersion composition comprising (A) powder, (B) oil, and (C) polyglyceryl polyricinoleate, (B) The oil content includes (b1) polar oil and (b2) volatile oil, (b1) Polar oil accounts for 50 to 80% by mass of the total oil content (B). (b2) At least 20% by mass of the volatile oil is volatile hydrocarbon oil, (C) Polyglyceryl polyricinoleate is present in an amount of 0.5 to 10% by mass of the total amount of the powder dispersion composition. (B) The amount of oil is 55 to 90% by mass of the total amount of the powder dispersion composition. Powder dispersion composition.

2. (b1) The powder dispersion composition according to claim 1, characterized in that the polar oil is selected from an oil-soluble ultraviolet absorber and an ester oil having an IOB value of 0.1 to 0.

8.

3. (b) The powder dispersion composition according to claim 1 or 2, characterized in that the volatile oil contains a volatile silicone oil.

4. The powder dispersion composition according to any one of claims 1 to 3, characterized in that the volatile hydrocarbon oil is one or more selected from isododecane, isodecane, isohexadecane, and hydrogenated polyisobutene.

5. A cosmetic composition comprising the powder dispersion composition according to any one of claims 1 to 4.

6. An emulsified cosmetic composition having the powder dispersion composition according to any one of claims 1 to 4 as the oil phase.

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