Oily solid cosmetic

Abstract

To provide an oily solid cosmetic comprising, as a main component of a solid oil, a natural-derived substance, exhibiting excellent pick-up by fingers, smooth spreadability, and high stability.SOLUTION: An oily solid cosmetic comprising: (a) 3-15 mass% of a solid oil; (b) 0.1-2.5 mass% of glyceryl behenate; (c) 0.1-2.5 mass% of polyglyceryl-6 octastearate; and (d) a liquid oil, the solid oil (a) comprising 70 mass% or more of sunflower seed wax and / or carnauba wax based on the total mass of the solid oil, and the liquid oil (d) comprising 50 mass% or less of hydrocarbon oil based on the total mass of the liquid oil.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oily solid cosmetic preparation. In particular, the present invention relates to an oily solid cosmetic preparation whose main constituent ingredients are naturally derived ingredients and which spreads easily onto fingers. [Background technology]

[0002] Oil-based solid cosmetics are widely used as moisturizers, hair cosmetics, cleansing agents, etc., and contain wax as the main ingredient and may also contain other active ingredients. Conventionally, petroleum-derived chemical components have been used as wax components. Known oil-based solid cleansing cosmetics contain solid oils with melting points of 50 to 120°C, liquid oils, nonionic surfactants with HLB values ​​of 5 to 13, Moroccan lava clay, and fumed silica (see, for example, Patent Document 1).

[0003] However, in recent years, consumers have increasingly preferred environmentally friendly cosmetics containing naturally derived ingredients. An oily makeup removal composition containing at least one sunflower wax, at least one specific nonionic surfactant, and at least one oil is known (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-26420 [Patent Document 2] International Publication No. 2012 / 095410 Summary of the Invention [Problem to be solved by the invention]

[0005] The composition of Patent Document 2 is disclosed as being effective for long-lasting makeup, practical, and comfortable, while containing naturally derived ingredients that are highly non-toxic to keratinous tissue. However, due to the inclusion of naturally derived ingredients, the composition is hard and difficult to remove with fingers. Reducing the wax content also reduces the stability of the composition. There is a need for an oil-based solid cosmetic that contains naturally derived ingredients as the main solid oil component, is easy to remove with fingers, spreads well, and is highly stable. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have come up with the idea of ​​creating an oily solid cosmetic that is easy to remove with fingers by adding a predetermined amount of another ingredient to a wax derived from natural ingredients, and have thus completed the present invention.

[0007] According to one embodiment, the present invention provides an oily solid cosmetic, comprising: (a) to (d) below (a) 3 to 15 mass % solid oil; (b) 0.1 to 2.5% by weight of glyceryl behenate; (c) 0.1 to 2.5% by mass of polyglyceryl-6 octastearate; (d) Liquid oil The present invention relates to an oil-based solid cosmetic comprising the above-mentioned (a) solid oil containing sunflower seed wax and / or carnauba wax in an amount of 70% by mass or more relative to the total mass of the solid oil, and the (d) liquid oil containing hydrocarbon oil in an amount of 50% by mass or less relative to the total mass of the liquid oil. The inclusion of hydrocarbon oil in an amount of 50% by mass or less relative to the total mass of the liquid oil includes an embodiment in which no hydrocarbon oil is contained.

[0008] In the oil-based solid cosmetic, the total mass of (a) solid oil, (b) glyceryl behenate, and (c) polyglyceryl-6 octastearate is preferably 5 to 20% by mass of the oil-based solid cosmetic.

[0009] The oily solid cosmetic preferably further contains (e) a surfactant having an HLB value of 4 to 17 and is intended for cleansing purposes.

[0010] In the oil-based solid cosmetic, the (e) surfactant having an HLB value of 4 to 17 is preferably contained in an amount of 3 to 40% by mass relative to the total mass of the oil-based solid cosmetic.

[0011] In the oil-based solid cosmetic, it is preferable that the (a) solid oil does not contain hydrocarbon waxes, silicone waxes, and animal-derived waxes in an amount of more than 1% by mass relative to the total mass of the oil-based solid cosmetic. [Effects of the Invention]

[0012] The oily solid cosmetic according to the present invention contains a naturally derived component as the main component of the solid oil, and is easy to remove with fingers, spreads well, and is also excellent in stability. DETAILED DESCRIPTION OF THE INVENTION

[0013] According to one embodiment, the present invention relates to an oily solid cosmetic. The oily solid cosmetic of the present invention refers to a cosmetic that is solid at room temperature (20 to 30°C) and contains an oily base material containing fats, oils, waxes, etc., and may optionally contain an active ingredient. Hereinafter, in this specification, the term "oil-based solid cosmetic" may be omitted and simply referred to as "cosmetic."

[0014] The cosmetic composition according to the present invention contains the following (a), (b), (c), and (d) as essential ingredients, and may further contain optional ingredients. (a) 3 to 15 mass% solid oil (b) 0.1 to 2.5% by mass of glyceryl behenate (c) 0.1 to 2.5% by mass of polyglyceryl-6 octastearate (d) Liquid oil Each component will be described below.

[0015] (a) Solid oil Component (a) is a solid oil. Solid oil is an oil that is solid at room temperature (20 to 30°C). The solid oil contains at least 70% by mass of sunflower seed wax and / or carnauba wax, assuming the total mass of the solid oil to be 100%. Therefore, component (a) may contain sunflower seed wax or carnauba wax alone, or a mixture of these. When component (a) contains a mixture of sunflower seed wax and carnauba wax, the mass ratio thereof may be arbitrary. Sunflower seed wax and / or carnauba wax are both derived from plant components and have properties such as a high melting point, good compatibility with various oils, and easy solidification, and are preferably used from the viewpoint of imparting shape retention to cosmetics. The reason for containing at least 70% by mass of these is to achieve appropriate hardness and storage stability.

[0016] Solid oils other than sunflower seed wax or carnauba wax are optional components that may be contained in an amount of up to 30% by mass, assuming the total mass of the solid oils to be 100%. This component is also a solid oil at room temperature (20 to 30°C). Therefore, any solid oil may be used as long as it satisfies the melting point requirement. Among these, plant-derived solid oils are preferred, such as candelilla wax, rice bran wax, Japan wax, hydrogenated jojoba oil, hydrogenated castor oil, hydrogenated rapeseed oil, hydrogenated palm oil, hydrogenated soybean oil, and urushi peel wax, or any mixture thereof, but are not limited to specific solid oils. The reason for limiting the amount of these to 30% by mass or less is that they would result in poor hardness and storage stability.

[0017] Component (a) may include hydrocarbon waxes, animal-derived waxes, and silicone waxes, but it is preferable that the total amount of these components does not exceed 1% by mass, assuming the total mass of the cosmetic composition as 100%. This is because consumers are demanding environmentally friendly products through initiatives such as the SDGs. Hydrocarbon waxes, which fall under the category of solid oils in component (a), are hydrocarbon compounds that are solid at room temperature and have a melting point of 40°C or higher, synthesized using petroleum or natural gas as raw materials. Specific examples include polyethylene wax, ethylene-propylene copolymer, Fischer-Tropsch wax, microcrystalline wax, ozokerite wax, paraffin wax, and ceresin wax. Examples of animal-derived waxes that fall under the category of solid oils in component (a) include beeswax and ivotaro wax. Silicone waxes, which fall under the category of solid oils in component (a), are silicones modified with long-chain alkyl groups or acrylic polymers to form solid forms. Specific examples include alkyl-modified silicone waxes, alkyl-modified acrylic silicone waxes, and alkyl-modified silicone resin waxes.

[0018] Component (a) is contained in an amount of 3 to 15% by mass, assuming the total mass of the cosmetic to be 100%. By containing component (a) in this range, a cosmetic can be obtained that is easy to pick up with your fingers, spreads easily, and is stable. The content of component (a) is preferably 5 to 12% by mass, and more preferably 7 to 10% by mass.

[0019] As used herein, "fingertip removability" refers to the ease with which a cosmetic user can remove an oily solid cosmetic composition of the present invention from a container such as a mold or jar at room temperature when the cosmetic composition is placed in the container and attempts to pick it up with their fingers. Typically, when trying to pick up an oily solid cosmetic composition solidified with wax with their fingers, their fingers slip, and only the surface portion of the oily solid cosmetic composition can be removed. However, good finger removability refers to the ability to pick up a volume of cosmetic composition equivalent to or greater than the volume of a fingertip with a single action. "Spreadability" refers to the ease with which a user can spread the cosmetic composition on their fingers and then use their fingers or palm to spread it over the area of ​​the body where it is to be applied. "Good spreadability" refers to the ability of a cosmetic composition to glide evenly over the skin. "Stability" refers to the change in the state of an oily solid cosmetic composition over time. Good stability refers to the ability of the oily solid cosmetic composition to melt into a liquid or not ooze oil from the area removed with their fingers at room temperature (20-30°C).

[0020] (b) Glyceryl Behenate Component (b) is glyceryl behenate, which has properties such as stabilizing emulsions and gelling oils, and is preferably used in cosmetics to impart properties such as emulsion stabilization and uniform dispersion of ingredients.

[0021] Component (b) is contained in an amount of 0.1 to 2.5% by mass, assuming the total mass of the cosmetic to be 100%. If component (b) is less than 0.1% by mass or more than 2.5% by mass, the cosmetic will become hard and difficult to remove with fingers. The content of component (b) is preferably 0.25 to 2% by mass, and more preferably 0.5 to 1.5% by mass. By setting the content within these ranges, a cosmetic can be obtained that has a good balance of finger removal, spreadability, and stability.

[0022] (c) Polyglyceryl-6 octastearate Component (c) is polyglyceryl-6 octastearate. Polyglyceryl-6 octastearate has properties such as stabilizing the emulsion state and gelling oil, and is preferably used in cosmetics from the viewpoint of imparting properties such as emulsion stabilization and uniform dispersion of ingredients.

[0023] Component (c) is contained in an amount of 0.1 to 2.5% by mass, assuming the total mass of the cosmetic to be 100%. If the amount of component (c) is less than 0.1% by mass or more than 2.5% by mass, the cosmetic becomes hard and difficult to remove with fingers. The content of component (c) is preferably 0.25 to 2% by mass, and more preferably 0.5 to 1.5% by mass. By setting the content within these ranges, a cosmetic can be obtained that has a good balance of finger removal, spreadability, and stability.

[0024] Components (b) and (c) are preferably included so that their combined mass is 0.2 to 5% by mass, assuming the total mass of the cosmetic to be 100%. The ratio of components (b) to (c) is preferably 1:3 to 3:1, and more preferably 1:2 to 2:1. This allows for a cosmetic that has a good balance of finger pick-up, spreadability, and stability.

[0025] It is preferable that components (a), (b), and (c) are included so that their total mass is 5% by mass or more and 20% by mass or less, assuming the total mass of the cosmetic to be 100%. If the total mass is less than 5% by mass, the cosmetic may be soft and may come off too easily with fingers or may be less stable. If the total mass exceeds 20% by mass, the cosmetic may be too hard and may not come off easily with fingers.

[0026] (d) Liquid oil Component (d) is an oil that is liquid at room temperature (20 to 30°C). The liquid oil may be a naturally derived component or a petroleum-derived component, and its origin is not limited. It may be a volatile liquid oil or a non-volatile liquid oil, and is not particularly limited. Specific examples of liquid oils include hydrocarbon oils such as (C15-19) alkanes, (C13-15) alkanes, squalane, isododecane, undecane, tridecane, hydrogenated polyisobutene, and hydrogenated polydecene, tri(caprylic / capric)glyceryl, coco-(caprylic / capric) acid, ethylhexyl palmitate, triethylhexanoin, diisostearyl malate, diglyceryl triisostearate, decaglyceryl decaisostearate, dimer diol dimerate, and tetraisostearic acid. Examples of suitable oils include, but are not limited to, pentaerythritol, diglyceryl tetraisostearate, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, neopentyl glycol dioctanoate, cholesterol fatty acid esters, esters such as jojoba oil, oils and fats such as olive oil, castor oil, mink oil, macadamia nut oil, fatty acids such as isostearic acid and oleic acid, and higher alcohols such as oleyl alcohol and isostearyl alcohol. Note that cosmetics may contain surfactants as optional ingredients, as described below, but surfactants are not considered to be liquid oils.

[0027] The liquid oil may contain one or more hydrocarbon oils. In this case, the total mass of the hydrocarbon oils is preferably 50% by mass or less, and more preferably 30% by mass or less, when the total mass of the cosmetic is 100%. This is because if the hydrocarbon oil content exceeds 50% by mass, the cosmetic will not solidify. Note that liquid hydrocarbon oil is an optional ingredient and may not be included in the cosmetic (including 0% by mass).

[0028] (e) Optional component In addition to the essential components (a) to (d) above, the cosmetic may contain optional components depending on the type and purpose of the cosmetic. In one embodiment, the oily solid cosmetic according to the present invention may be used for cleansing purposes. The oily solid cosmetic for cleansing (e.g., cleansing balm) contains a surfactant as an optional component. The surfactant functions as a cleansing component in combination with the essential components (a) to (d) above, which serve as the base. As the surfactant, surfactants with an HLB (Hydrophile Lipophile Balance) of 4 to 17 are particularly preferred. If the HLB is lower than 4, they will not blend well with water, making them difficult to rinse off with water and may not leave a refreshing feeling after rinsing. If the HLB is higher than 17, hydrophobic makeup may not blend well with the cleansing cosmetic, resulting in insufficient makeup removal.

[0029] There are no particular limitations on the surfactant having an HLB of 4 to 17, as long as it can be incorporated into cosmetics. Examples of surfactants having an HLB of 4 to 17 include polyoxyethylene (hereinafter also referred to as POE) (5 to 10 mol) hexadecyl ether, POE (6 to 9 mol) oleyl ether, POE (5 to 7 mol) lauryl ether, POE (5 to 10 mol) isostearyl ether, POE (8 to 12 mol) dilaurate, POE (6 to 12 mol) monoisostearate, POE (10 to 20 mol) diisostearate, POE (5 to 12 mol) monooleate, POE (5 to 40 mol) diisostearate, POE (5 to 40 ... diisostearate, POE (5 to 40 mol) monooleate, POE (5 to 40 mol) diisostearate, POE (5 to 40 mol) monooleate, POE (5 to 40 mol) diisostearate, POE (5 POE (20-40 mol) glyceryl monoisostearate, POE (10-40 mol) glyceryl diisostearate, POE (15-25 mol) sorbitan monolaurate, POE (15-25 mol) sorbitan monooleate, POE (20-50 mol) glyceryl trioleate, POE (20-40 mol) trimethylolpropane trimyristate, POE (20-50 mol) trimethylolpropane triisostearate, PO POE (10-40 mol) hydrogenated castor oil, POE (15-50 mol) castor oil, POE (20-60 mol) hydrogenated castor oil monolaurate, POE (20-60 mol) hydrogenated castor oil monoisostearate, POE (30-60 mol) hydrogenated castor oil triisostearate, sorbitan monoisostearate, sorbitan monooleate, POE (20-30 mol) sorbitol tetraoleate, tetraglyceryl monoisostearate, polyglyceryl monoisostearate, monoisostearate Examples of the polyglyceryl esters include hexaglyceryl monoisostearate, decaglyceryl diisostearate, hexaglyceryl diisostearate, decaglyceryl diisostearate, polyglyceryl caprylate, polyglyceryl caprate, polyglyceryl laurate, polyglyceryl oleate, polyglyceryl sesquioleate, and polyglyceryl polyricinoleate. These may be used alone or in combination of two or more, but are not limited to these.

[0030] The surfactant content in the cleansing cosmetic according to this embodiment may be the same as that in a typical cleansing cosmetic. For example, when the total mass of the cosmetic is taken as 100%, the surfactant content can be 4 to 30 mass%, preferably 7 to 25 mass%. By setting the surfactant content within this range, a cosmetic can be obtained that is easy to remove makeup and rinse off, and is less irritating to the skin.

[0031] In another embodiment, the oily solid cosmetic according to the present invention may be used for moisturizing purposes, and may contain, as an optional ingredient, a component that assists moisturizing.

[0032] Other examples of optional components include other components commonly used in cosmetics, quasi-drugs, pharmaceutical compositions, etc., such as oils other than those mentioned above, water, polymeric compounds, fragrances, colorants, surfactants, antioxidants, preservatives, moisturizers, polyhydric alcohols, lower alcohols, sugars, UV absorbers, whitening agents, skin activators, blood circulation promoters, antiseborrheic agents, anti-inflammatory agents, astringents, and cooling agents. The content of these optional components can be appropriately set depending on the purpose. For example, when water is included, the amount may be less than 5% by mass, assuming the total mass of the cosmetic to be 100%.

[0033] Next, the method for producing a cosmetic according to the present invention includes the following steps. (1) A step of heating oil components (a), (b), (c), and (d) to approximately 75 to 90°C and uniformly mixing them to prepare a mixed liquid. (2) A step of filling the mixture prepared in (1) into a jar container at 75 to 90°C and then cooling it. By carrying out steps (1) and (2) in this order, an oily solid cosmetic can be obtained.

[0034] When the oil-based solid cosmetic contains a surfactant, which is an optional ingredient, it is preferable to further include a step of adding the surfactant and mixing uniformly at 75 to 90°C after preparing the mixed solution in step (1) and before filling into a container and cooling in step (2). This allows a cleansing cosmetic to be obtained. Furthermore, when water, which is an optional ingredient, is included, it can be added after step (1) and before step (2), as with the surfactant.

[0035] Specific examples of the oily solid cosmetic preparation according to the present invention include, but are not limited to, moisturizers, cleansers, balms, etc. Oily solid cosmetic preparations are generally stored in containers such as jars or molds, and are used in a form that allows the user to take the cosmetic preparation directly with their fingers. [Example]

[0036] The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the following examples. Oily solid cosmetic preparations (balms) were prepared based on the compositions of the examples and comparative examples shown in Tables 1 and 2 below, and their properties were evaluated.

[0037] 1. Method for preparing oil-based solid cosmetics The oily solid cosmetic preparations were prepared using the ingredients listed in Tables 1 and 2 below, in accordance with the above steps (1) and (2). The heating temperature was 85°C.

[0038] 2. Evaluation The evaluation items for the obtained oily solid cosmetic preparations were "ease of removability with fingers," "ease of spreadability," and "storage stability," and the evaluation methods and criteria were as follows.

[0039] (1) Sensory test Five expert panelists performed sensory evaluations of the "ease of finger removal" and "ease of spread" when using the cosmetics shown in the Examples and Comparative Examples, using a maximum of 5 points according to the following panelist evaluation criteria, and the average value (rounded to the nearest whole number) was calculated. Next, based on the average score, a four-point rating was given in accordance with the cosmetic performance evaluation criteria. Note that samples that did not solidify even after natural cooling to room temperature were given a rating of "-" for the above two items, and the sensory test was not performed.

[0040] <Evaluation criteria by panelists> 5: Very good 4: Good 3: Fairly good 2: Bad 1: Very bad <Cosmetic performance evaluation criteria> ◎: Average score is over 4 points ○: Average score is over 3 points and 4 points or less △: Average score is over 2 points and 3 points or less ×: Average score is 2 points or less

[0041] (2) Storage stability test 100 g of the oily solid cosmetic preparations of the Examples and Comparative Examples were placed in a plastic jar and sealed, and stored in a 50°C thermostatic chamber at 40°C and 75% humidity for one month, after which a visual evaluation was made according to the following criteria: Samples that did not solidify even after natural cooling to room temperature were given an "E" rating, and the storage stability test was not carried out.

[0042] <Evaluation criteria for storage stability> A: The sample is solid and no changes in appearance are observed on the surface. B: The sample is solid, but there is a small amount of oil floating on the surface. C: The sample is solid, but there is clear oil floating on part of the surface. D: The sample is solid, but liquid oil is oozing from the entire surface, or the sample is not solid.

[0043] 3.Results Tables 1 and 2 below show the composition and evaluation results of each cosmetic. The numerical values ​​for the ingredients in the tables represent the mass percent concentration when the total mass of the cosmetic is 100%, and if the relevant ingredient is not included, it is indicated with a "-". The total of each ingredient is 100%. Substances that fall under essential ingredients (a), (b), (c), and (d) are indicated by the appropriate symbol in the leftmost column of each table. Note that "candelilla wax" falls under ingredient (a) only when it is contained in an amount of 30 mass% or less of the total mass of ingredient (a), so it is not indicated with the "a" symbol.

[0044] [Table 1]

[0045] [Table 2]

[0046] As shown in Table 1, the cosmetics according to Examples 1 to 13 of the present application were excellent in terms of finger pick-up, spreadability, and storage stability, and the use of naturally derived solid oil components enabled the realization of cosmetics with high usability.

[0047] 4. Prescription examples Various solid cleansing cosmetic compositions of the present invention having various formulations are shown below as examples. The number following each component indicates the mass % of that component when the total mass of the oil-based solid cosmetic composition is taken as 100%, and the symbol indicates the corresponding essential component. All formulations were produced in accordance with the method of Example 1. Furthermore, when efficacy tests were conducted on Formulation Examples 1 and 2 in the same manner as in the Examples, excellent results were obtained in terms of "ease of finger removal," "ease of spread," "storage stability," "ease of rinsing," "ease of makeup removal," and "moisturizing properties after cleansing."

[0048] Prescription example 1: Cleansing balm (1) Carnauba wax (a) 2.0 (2) Glyceryl behenate (b) 1.5 (3) Glyceryl octastearate-6(c) 1.5 (4) Caprylic / Capric Triglyceride (d) 40.0 (5) Ethylhexyl palmitate (d) 34.45 (6) Polyglyceryl diisostearate (HLB: 4.1) 5.0 (7) Polyglyceryl-2 Caprate (HLB: 9.5) 10.0 (8) Tocopherol (appropriate amount) (9) Preservative remaining amount

[0049] Prescription example 2: Cleansing balm (1) Sunflower wax (a) 5.0 (2) Rice bran wax (a) 2.0 (2) Glyceryl behenate (b) 2.0 (3) Glyceryl octastearate-6(c) 2.0 (4) Caprylic / Capric Triglyceride (d) 73.45 (5) Polyglyceryl-3 diisostearate (HLB: 5.2) 5.0 (6) Polyglyceryl-2 Caprate (HLB: 9.5) 10.0 (8) Tocopherol (appropriate amount) (9) Preservative remaining amount

[0050] It goes without saying that the present invention is not limited in any way by these formulation examples, but is defined by the claims. All blend amounts are expressed in mass % relative to the total mass of the cosmetic.

Claims

1. The following (a) to (d) (a) 3 to 15 mass % of solid oil; (b) 0.1 to 2.5% by weight of glyceryl behenate; (c) 0.1 to 2.5% by mass of polyglyceryl-6 octastearate; (d) Liquid oil An oily solid cosmetic comprising: The solid oil (a) contains sunflower seed wax and / or carnauba wax in an amount of 70% by mass or more based on the total mass of the solid oil, An oily solid cosmetic preparation, wherein the liquid oil (d) contains hydrocarbon oil in an amount of 50% by mass or less based on the total mass of the liquid oil.

2. 2. The oily solid cosmetic according to claim 1, wherein the combined mass of (a) the solid oil, (b) glyceryl behenate, and (c) polyglyceryl-6 octastearate is 5 to 20% by mass relative to the total mass of the oily solid cosmetic.

3. (e) Surfactants with an HLB of 4 to 17 The oily solid cosmetic preparation according to claim 1, further comprising:

4. 4. The oily solid cosmetic according to claim 3, wherein the surfactant (e) having an HLB of 4 to 17 is contained in an amount of 3 to 40% by mass relative to the total mass of the oily solid cosmetic.

5. 2. The oily solid cosmetic according to claim 1, wherein the solid oil (a) does not contain hydrocarbon waxes, animal-derived waxes, and silicone waxes in an amount of more than 1% by mass, based on the total mass of the oily solid cosmetic.

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