Oil-based solid cosmetics

Abstract

To provide an oil-based solid cosmetic that has excellent stability and usability while using only vegetable solid oil.SOLUTION: An oil-based solid cosmetic comprises the following components: (A) a solid oil solution comprising (a1) sunflower seed wax and (a2) candelilla wax but not comprising synthetic or mineral solid oil and (B) a liquid oil solution comprising (b) liquid oil with an IOB value of 0.1 or more. In the component (A), the total content of the component (a1) and the component (a2), (((a1) +(a2)) / (A)), is 25 mass% or more, and the mass ratio of the component (a2) to the component (a1), ((a1): (a2)), is 95: 5-50: 50. In the component (B), the content of the component (b), ((b) / (B)), is 30 mass% or more. In the cosmetic, the content of the component (A) is 4-16 mass%.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oily solid cosmetic preparation. [Background technology]

[0002] Conventionally, in order to achieve both high stability and ease of use in oil-based solid cosmetics, synthetic or mineral solid oils such as paraffin and microcrystalline wax have generally been used as the solid oil.

[0003] On the other hand, due to the increasing concern for the environment worldwide, there is a demand for cosmetics that do not contain synthetic or mineral-based ingredients and are compatible with the SDGs. However, it is difficult to obtain sufficient stability and excellent usability with oil-based solid cosmetics that use only vegetable solid oils (Patent Document 1), and synthetic or mineral solid oils are currently used in addition to vegetable solid oils. For example, the oil-based solid cosmetic that uses vegetable solid oils disclosed in Patent Document 2 contains polyethylene wax as an essential ingredient for improving its stability and usability. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-224707 A [Patent Document 2] JP 2006-248997 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in order to solve the above-mentioned problems of the prior art, and has an object to provide an oil-based solid cosmetic preparation which is excellent in stability and usability while using only vegetable solid oils. [Means for solving the problem]

[0006] As a result of intensive research, the present inventors have found that by blending a specific vegetable solid oil with a liquid oil having a specific polarity in a specific ratio, high stability and usability can be achieved without using synthetic or mineral solid oils.

[0007] That is, the present invention provides an oil-based solid cosmetic comprising the following components: (A) a solid oil agent containing (a1) sunflower seed wax and (a2) candelilla wax and containing no synthetic or mineral solid oil, and (B) (b) a liquid oil agent containing a liquid oil having an IOB value of 0.1 or more, wherein the total content of components (a1) and (a2) in component (A) (((a1)+(a2)) / (A)) is 25% by mass or more, the mass ratio of component (a2) to component (a1) ((a1):(a2)) is 95:5 to 50:50, the content of component (b) in component (B) ((b) / (B)) is 30% by mass or more, and the content of component (A) in the cosmetic is 4 to 16% by mass.

[0008] The content of component (A) in the cosmetic preparation is preferably 5 to 14% by mass.

[0009] The ratio (b) / (B) is preferably 35% by mass or more.

[0010] It is preferable that ((a1)+(a2)) / (A) is 30 mass % or more.

[0011] The ratio of (a1):(a2) is preferably 90:10 to 60:40. Effect of the Invention

[0012] According to the present invention, it is possible to provide an environmentally friendly oily solid cosmetic preparation that has high stability and ease of use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will be described in detail below, but the present invention is not limited to the embodiments described in the present specification.

[0014] The present invention is an oil-based solid cosmetic comprising the following components: (A) a solid oil agent containing (a1) sunflower seed wax and (a2) candelilla wax and containing no synthetic or mineral solid oil, and (B) (b) a liquid oil agent containing a liquid oil having an IOB value of 0.1 or more, wherein the total content of components (a1) and (a2) in component (A) (((a1)+(a2)) / (A)) is 25% by mass or more, the mass ratio of component (a2) to component (a1) ((a1):(a2)) is 95:5 to 50:50, the content of component (b) in component (B) ((b) / (B)) is 30% by mass or more, and the content of component (A) in the cosmetic is 4 to 16% by mass.

[0015] Component (A) is a solid oil. Here, a solid oil is a substance that is solid at room temperature. In the form The solid oil agent (A) in the present invention includes (a1) sunflower seed wax and (a2) candelilla wax, but does not include synthetic or mineral solid oils. Therefore, the solid oil agent (A) in the present invention does not include paraffin, polyethylene, petrolatum, ceresin, microcrystalline wax, etc.

[0016] The oil-based solid cosmetic of the present invention must contain a total of 25% by mass or more of sunflower seed wax (a1) and candelilla wax (a2) when the total mass of component (A) is taken as 100%. This is because if the total content of components (a1) and (a2) is less than 25% by mass, the shape retention and stability of the cosmetic will decrease. In order to more reliably increase the shape retention and stability of the cosmetic, the total content of components (a1) and (a2) in component (A) is preferably 30% by mass or more, more preferably 35% by mass or more.

[0017] Furthermore, in component (A), it is necessary that (a1) sunflower seed wax and (a2) candelilla wax are blended in a mass ratio of 95:5 to 50:50. Within this mass ratio range, an oil-based solid cosmetic preparation with good spreadability and gloss and excellent stability can be obtained. On the other hand, if the blending ratio of (a2) candelilla wax exceeds the above range, the solidification power is weakened and the stability of the cosmetic preparation decreases. Also, if the blending ratio of (a1) sunflower seed wax exceeds the above range, the spreadability and gloss decrease. In order to more reliably obtain a cosmetic preparation with good effects in all respects, (a1) sunflower seed wax and (a2) candelilla wax are preferably blended in a mass ratio of 90:10 to 60:40, and more preferably blended in a mass ratio of 90:10 to 70:30.

[0018] Component (A) may be appropriately blended with vegetable solid oils other than (a1) sunflower seed wax and (a2) candelilla wax, as long as the effects of the present invention are not impaired. Such vegetable solid oils may be any oils used in ordinary cosmetics, including, but not limited to, candelilla wax hydrocarbons, carnauba wax, jojoba esters, rice bran wax, and hydrogenated castor oil.

[0019] Component (B) is a liquid oil. Here, the liquid oil refers to an oil that is liquid in the range from room temperature to the manufacturing temperature of the cosmetic (25 to 80°C). When the total mass of component (B) is taken as 100%, the liquid oil (B) in the present invention must contain 30% by mass or more of component (b), a liquid oil having an IOB value of 0.1 or more. If the content of component (b) is less than 30% by mass, component (A) will not function as a solidifying agent, and the stability of the cosmetic will be impaired. In order to more reliably increase the stability of the cosmetic, the content of component (b) in component (B) is preferably 35% by mass or more, more preferably 40% by mass or more. Incidentally, the "IOB value" is an abbreviation for Inorganic / Organic Balance, a value calculated based on the Organic Concept Diagram (Fujita Atsushi, Chemistry Area, 1957, Vol. 11, No. 10, pp. 719-725). When using a commercially available product as a liquid oil, the IOB value indicated on the product may be used.

[0020] Any liquid oil having an IOB value of 0.1 or more can be used as component (b). Specifically, for example, vegetable oils such as (caprylic acid / capric acid) coconut alkyl (IOB=0.14), polyglyceryl-2 tetraisostearate (IOB=0.17), polyglyceryl-2 triisostearate (IOB=0.26), tri(caprylic acid / capric acid)glyceryl (IOB=0.32), di(phytosteryl / octyldodecyl) lauroyl glutamate (IOB=0.30), polyglyceryl-2 diisostearate (IOB=0.42); ethylhexyl palmitate (IOB=0.13), cetyl ethylhexanoate (IOB=0.13); ), isotridecyl isononanoate (IOB=0.15), pentaerythrityl tetraisostearate (IOB=0.16), neopentyl glycol dicaprate (IOB=0.25), isononyl isononanoate (IOB=0.20), neopentyl glycol diethylhexanoate (IOB=0.32), triethylhexanoin (IOB=0.35), diisostearyl malate (IOB=0.33), and other plant-derived or semi-synthetic ester oils; higher alcohols such as octyldodecanol (IOB=0.26), but are not limited thereto. The liquid oil agent (B) in the present invention may be any of the above, either alone or in combination of two or more kinds, and when two or more kinds are combined, the ratio may be any.

[0021] Component (B) can be appropriately blended with liquid oils other than component (b) within the scope of not impairing the effects of the present invention. Such liquid oils may be any oils used in ordinary cosmetics, including, but not limited to, squalane (IOB=0), (C9-12) alkane (IOB=0), (C13-15) alkane (IOB=0), (C15-19) alkane (IOB=0), etc.

[0022] In the oil-based solid cosmetic of the present invention, when the total mass of the oil-based solid cosmetic is taken as 100%, the content of the above component (A) is 4 to 16% by mass. Within this range, an oil-based solid cosmetic having good spreadability, glossiness, and excellent stability can be obtained. On the other hand, if the content of component (A) is less than 4% by mass, component (A) does not function as a solidifying agent, and the stability of the cosmetic is impaired. Also, if the content of component (A) exceeds 16% by mass, the cosmetic spreads poorly and its glossiness decreases. In order to more reliably obtain a cosmetic having good effects in all respects, the range of the above mass ratio is preferably 5 to 14% by mass, and more preferably 5 to 12% by mass.

[0023] In addition to the above-mentioned components, the oil-based solid cosmetic preparation of the present invention may appropriately contain components used in ordinary cosmetics, such as dyes, pigments, pearling agents, surfactants, water-soluble polymers, oil-soluble polymers, lower alcohols, water, preservatives, antioxidants, thickeners, colorants, pH adjusters, fragrances, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, and skin activators, within a range that does not impair the effects of the present invention.

[0024] The method for producing the oil-based solid cosmetic of the present invention is not particularly limited, and the oil-based solid cosmetic can be produced by using a mixer typically used for producing oil-based solid cosmetic products, adding component (B) and other components to component (A) that has been heated and dissolved at a temperature equal to or higher than the melting point, mixing the mixture, filling it into a container, and molding it as necessary.

[0025] The oily solid cosmetic of the present invention can be in the form of a product such as lipstick, lip balm, foundation, blush, concealer, beauty essence stick, or external solid preparation.

[0026] The oil-based solid cosmetic preparation of the present invention can achieve high stability and usability while using only vegetable solid oil, and is useful for providing cosmetics that comply with the SDGs. EXAMPLES

[0027] The present invention will be further described below with reference to examples, but the present invention is not limited thereto.

[0028] <Examples 1 to 13 and Comparative Examples 1 to 15: Lipstick> Lipsticks were prepared using the compositions and manufacturing methods shown in Tables 1 to 3 below, and were evaluated in terms of "shape retention," "spreadability upon application," "luster," and "stability over time" using the evaluation methods and criteria shown below, with the results also shown in Tables 1 to 3. In the tables, the values ​​for each component are in mass %.

[0029] [Table 1]

[0030] [Table 2]

[0031] [Table 3]

[0032] *1: Refined sunflower wax (Yokoseki Oil Industry Co., Ltd.) *2: Candelilla wax NC-1630 (Cerarica NODA Co., Ltd.) *3: MIGLYOL Coco 810 (IOI Oleo GmbH) *4: Cosmol 43V (Nisshin Oillio Group, Ltd.) *5: Eldew PS-203 (Ajinomoto Co., Inc.) *6: TCG-M / MB (Kyukyu Alcohol Kogyo Co., Ltd.)

[0033] [Manufacturing method] The components were heated to 85°C, mixed with stirring, degassed, and then filled into a container and cooled to obtain a lipstick cosmetic.

[0034] [Evaluation method and criteria] i. Shape retention (Evaluation method) Each sample was evaluated by visual observation. (Evaluation Criteria) ◎: Excellent (excellent solid state) ○: Fairly good (fairly good solid state) △: Poor (paste-like to soft) ×: Very poor (liquid)

[0035] ii.Spreadability when applied (Evaluation method) A practical usability test was conducted by 10 expert panelists. Each sample was applied to the lips and scored according to the following criteria, and the average score was used as the evaluation value and evaluated according to the following evaluation criteria. (Score) 5 points: Easy to spread when applied 4 points: Slightly light spread when applied 3 points: Normal spread when applied 2 points: Slightly hard to spread when applied 1 point: Hard to spread when applied (Evaluation Criteria) ◎: Score (average) 4.0 to 5.0 points ○: Score (average) 3.0 or more and less than 4.0 points △: Score (average) 2.0 or more and less than 3.0 points ×: Score (average value) 1.0 or more but less than 2.0 points

[0036] iii. Shine (Evaluation method) A practical usability test was conducted by 10 expert panelists. Each sample was applied to the lips and scored according to the following criteria, and the average score was used as the evaluation value and evaluated according to the following evaluation criteria. (Score) 5 points: Shiny 4 points: Slightly glossy 3 points: Normal gloss 2 points: Somewhat dull 1 point: dull (Evaluation Criteria) ◎: Score (average) 4.0 to 5.0 points ○: Score (average) 3.0 or more and less than 4.0 points △: Score (average) 2.0 or more and less than 3.0 points ×: Score (average value) 1.0 or more but less than 2.0 points

[0037] iv. Stability over time (Evaluation method) Each sample was stored at room temperature or at 40°C for one month, and the presence or absence of changes such as sweating was evaluated by visual observation. (Evaluation Criteria) ◎: There is no difference between the items stored at room temperature and at 40℃, and neither has changed. ○: Slight changes were observed in products stored at 40℃, but there was no problem with usability. △: Clear changes were observed in the product stored at 40℃, and it cannot be used. ×: Changes were observed in both items stored at room temperature and at 40℃

[0038] [result] As is clear from the results in Tables 1 to 3, Examples 1 to 13, which are the embodied products of the present invention, were oil-based solid cosmetics excellent in all of the items of "shape retention," "spreadability upon application," "luster," and "stability over time." On the other hand, in Comparative Examples 3 and 4, in which the content of component (A) in the cosmetics was outside the range of 5 to 14% by mass, Comparative Examples 14 and 15, in which the content of component (b) in component (B) ((b) / (B)) was less than 30% by mass, Comparative Examples 1, 2, 8, 9, 12, and 13, in which the total content of components (a1) and (a2) in component (A) (((a1)+(a2)) / (A)) was low, and Comparative Examples 5 to 7, 10, and 11, in which the mass ratio of component (a2) to component (a1) ((a1):(a2)) was outside the range of 95:5 to 50:50, many of the cosmetics were excellent in spreadability and luster but poor in shape retention and stability over time, and none of them were able to achieve both usability and shape retention and stability over time.

Claims

1. The following ingredients: (A) a solid oil agent comprising (a1) sunflower seed wax and (a2) candelilla wax, and not comprising solid synthetic oils or solid mineral oils; and (B) (b) A liquid oil agent containing a liquid oil having an IOB value of 0.1 or more An oil-based solid cosmetic comprising: the total content of components (a1) and (a2) in component (A), ((a1)+(a2)) / (A)), is 25 mass% or more, and the mass ratio of component (a2) to component (a1), ((a1):(a2)), is 95:5 to 50:50; the content ((b) / (B)) of component (b) in component (B) is 30 mass% or more; The content of component (A) in the cosmetic is 4 to 16% by mass, The oil-based solid cosmetic does not contain a polyglycerol fatty acid ester of glycerin having an average polymerization degree of 4 or more.

2. 2. The oily solid cosmetic preparation according to claim 1, wherein the content of component (A) in the cosmetic preparation is 5 to 14% by mass.

3. 3. The oily solid cosmetic preparation according to claim 1, wherein (b) / (B) is 35% by mass or more.

4. The oily solid cosmetic preparation according to any one of claims 1 to 3, wherein ((a1)+(a2)) / (A) is 30 mass% or more.

5. The oily solid cosmetic preparation according to any one of claims 1 to 4, wherein the ratio of (a1):(a2) is 90:10 to 60:40.

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