JP2021143133A - Oily solid cleansing cosmetic - Google Patents

Abstract

To provide an oily solid cleansing cosmetic blended with a solid oil composition which is excellent in oil solidifying ability in spite of having a low melting point, is excellent in shape holding property and easiness of taking out when formed into an oily solid cleansing cosmetic and has high biodegradability even when released in an environment.SOLUTION: There is provided an oily solid cleansing cosmetic which comprises (A) 1 to 30 mass% of a solid oil having a melting point of 50 to 120°C, (B) 50 to 97 mass% of a liquid oil and (C) 2 to 40 mass% of a nonionic surfactant having an HLB value of 5 to 13 (with a ratio in the total amount of the cosmetic), where the solid oil (A) contains (A-1) behenyl behenate and (A-2) a Fischer-Tropsch wax having a melting point of 50 to 120°C in a mass ratio of (A-1):(A-2)=20:75 to 95:5.SELECTED DRAWING: Figure 1

Description

The present invention relates to an oily solid cleansing cosmetic containing a solid oil composition having an excellent solidifying ability of a liquid oil.

In recent years, in make-up cosmetics such as lipsticks, foundations, eye shadows, and mascaras, products having excellent water resistance and oil resistance have been developed, and the longevity of makeup has been remarkably improved. Therefore, when removing the makeup film with make-up cosmetics, oil-based cleansing cosmetics that are familiar with makeup (makeup film on the skin) and have excellent performance (stain removal property) to remove stains such as keratin and sebum. Is used. Specific examples of oil-based cleansing cosmetics include cleansing oils, gel-like cleansing agents, and cleansing creams. Among them, oil-based cleansing cosmetics that are solid at room temperature do not drip during use and blend well with makeup. It has the feature that it is easy to massage when it is applied, and its development is being enthusiastically promoted.

Oil-based solid cleansing cosmetics can be obtained by melting a cleansing oil composition together with solid oil and cooling and solidifying the cleansing oil composition to form a so-called oil gel. However, the performance required for the solid oil used is a small amount. It has the ability to solidify liquid oil (also referred to as oil in the present specification) by blending, the ability to retain oil that does not separate the solidified liquid oil, and the cosmetics when solid oil is used to make oil-based solid cosmetics. Easy to remove (easy to collapse oil gel) and good elongation are also required.

Generally, a solid oil having a higher melting point has a higher oil solidifying ability, but the use of a solid oil having a higher melting point causes deterioration of other components during heating during the production of cosmetics, so that the melting point is low and the oil solidifying ability is high. Solid oil (composition) is required. In particular, oil-based solid cleansing cosmetics have a capacity of several g to several tens of g per product of makeup cosmetics such as lipstick, which is a typical oil-based solid cosmetic, while a capacity of several tens of g or more per product. Since it is as large as a hundred and several tens of g, the heating time in the bulk production and filling steps is long, so that the solid oil is required to have a low melting point so that it can be produced at a lower temperature. Furthermore, in the case of cleansing cosmetics that can be washed away, since they are released into domestic wastewater, they are also required to be components with a high degree of biodegradation.

In order to satisfy such performance, Patent Document 1 proposes a wax composition containing a candelilla wax and a monoester having a total carbon number of 40 to 48, and a solid oil-based cosmetic containing the wax composition. There is. However, as described later, according to the experiments conducted by the present inventors, the oil solidifying ability was still insufficient with the combination of candelilla wax and a monoester having a total carbon number of 40 to 48.

Patent Document 2 discloses a wax-like composition containing (A) a specific polyester and (B1) ester wax, (B2) hydrocarbon wax or (B3) higher alcohol or higher fatty acid, and (B1). , (B2) and (B3) are also disclosed as a composition (claim 4) containing three kinds of wax components at the same time. However, there is no disclosure of a wax composition containing behenyl behenate as an ester wax and Fischer-Tropsch wax as a hydrocarbon wax in a specific ratio, and by combining these two components, the oil solidifying ability is excellent and the melting point is also high. No mention is made of obtaining a low solid oil composition.

Examples 1 to 6 of Patent Document 3 disclose an oil-based solid cleansing cosmetic containing microcrystalline wax or polyethylene wax as a wax, but there is concern about deterioration of other components due to the high melting point of the wax. In addition, since both microcrystalline wax and polyethylene wax contain a large amount of branched hydrocarbons having a low degree of biodegradation, there is a problem of environmental pollution due to these components released into domestic wastewater after washing.

International Publication No. 2018/1238224 Japanese Unexamined Patent Publication No. 2018-123117 Japanese Unexamined Patent Publication No. 2001-213726

The present invention has been completed based on such a background technique, and an object of the present invention is excellent oil solidification ability in spite of low melting point, and shape retention and ease of removal when used as an oil-based solid cleansing cosmetic. It is an object of the present invention to provide an oil-based solid cleansing cosmetic containing a solid oil composition which is excellent in quality and has high biodegradability even when released into the environment.

Therefore, as a result of diligent research to solve such a problem, the present inventors have found that the above requirements are satisfied by combining behenic behenate and Fischer-Tropschwax having a specific melting point in a specific ratio, and complete the present invention. I arrived.

Thus, according to the present invention, (A) solid oil having a melting point of 50 to 120 ° C. is 1 to 30% by mass, (B) liquid oil is 50 to 97% by mass, and (C) HLB value is 5 to 13. An oily solid cleansing cosmetic containing an ionic surfactant in a proportion of 2 to 40% by mass (ratio in the total amount of cosmetics), wherein the solid oil (A) is (A-1) behenyl behenate. And (A-2) an oil-based solid cleansing makeup containing Fishertropch wax having a melting point of 50 to 120 ° C. in a mass ratio of (A-1) :( A-2) = 20: 75 to 95: 5. Fees will be provided.

The solid oil used in the present invention has a high oil solidifying ability while having a low melting point. Therefore, the oil-based solid cleansing cosmetic containing this is easy to manufacture because it does not require a high temperature at the time of heating and melting, has excellent shape retention, and is easy to use because it can be taken smoothly. Further, the cosmetic of the present invention has a high degree of biodegradation even when released into the environment as a cleansing cosmetic, and has little impact on the environment.

FIG. 1 shows the mass ratio of behenic acid behenate to the total of behenic acid behenic acid (A-1) and Fischer-Tropschwax (A-2) in the examples ((A-1) / [(A-1) + ( It is a graph which shows the relationship between A-2)]) and hardness and melting point.

(A) Solid oil The solid oil according to the present invention exhibits a high oil solidifying ability. In the present specification, the oil solidifying ability means when a solid oil and the remaining cosmetic component containing a liquid oil at room temperature (25 ° C.) are dissolved at a temperature equal to or higher than the melting point of the solid oil and allowed to stand to cool. , The ability to generate oil gel and solidify liquid oil, and the oil solidification ability can be evaluated by measuring the hardness of the oil gel.

The content of the solid oil according to the present invention in the total amount of the oily solid cleansing cosmetics is 1 to 30% by mass, preferably 2 to 25% by mass, and more preferably 3 to 20% by mass. When the content of the solid oil is in this range, good shape retention (morphological retention), stability and ease of removal during use can be achieved.

(A-1) Behenic Behenate Behenic acid, which is a component of (A-1) used in the present invention, is an ester of behenic acid and behenic alcohol, and has a melting point of 70 to 75 ° C. and is a solid oil at room temperature. RIKEN It is available from Vitamin, Nisshin Oillio Group, etc. Behenic behenate alone does not have a high oil-solidifying ability, but surprisingly, when used in combination with Fischer-Tropsch wax, which is a component (A-2), it has a higher oil-solidifying ability than when the component (A-2) is used alone. Indicated. On the other hand, the melting point of this mixture did not greatly exceed the melting point predicted from the mixing ratio of the component (A-1) and the component (A-2). In addition, behenic behenate is expected to exhibit higher biodegradability than hydrocarbon-based solidifying agents.

The content of behenyl behenyl (A-1) is preferably 0.5 to 25% by mass, as long as it satisfies the range of the mass ratio described later in the total amount of the oily solid cleansing cosmetics of the present invention. It is preferably 0.5 to 20% by mass, more preferably 1 to 15% by mass. When the content of (A-1) behenic acid behenic acid is in this range, good shape retention (morphological retention), stability and ease of removal during use can be achieved.

(A-2) Fischer-Tropsch wax having a melting point of 50 to 120 ° C. Fischer-Tropsch wax having a melting point of 50 to 120 ° C. as a component (A-2) used in the present invention (in this specification, it may be referred to as "FT wax". ) Is a synthetic hydrocarbon wax mainly containing a linear hydrocarbon, and is synthesized by the Fischer-Tropsch method by reacting an aqueous gas containing carbon monoxide and hydrogen as main components. In addition, the WEB site of Fischer-Tropschwax manufacturer Cirebelle (“WAXES”, [online], [Search January 29, 2020], Internet (URL: https://cirebelle.com/fine-chemicals/waxes) /)) Describes that the Fischer-Tropsch wax, Cire wax, is inherently biodegradable, even when used as a cleaning agent for, for example, oily solid cleansing cosmetics. It can be expected that the burden on the environment will be smaller than that of general-purpose polyethylene wax.

The melting point of the component (A-2) according to the present invention is 50 to 120 ° C, preferably 60 to 110 ° C, and more preferably 70 to 100 ° C. If the melting point is excessively low, the oil-solidifying ability of the solid oil composition is not sufficient, and if it is excessively high, a high temperature is required during the production of the solid oil composition or cosmetics, so that other components are deteriorated. Is easy to cause. In the present specification, the melting point of the wax and the solid oil composition can be measured by the melting point measuring method No. 2 which is a general test method of the quasi-drug raw material standard.

Examples of commercially available Fischer-Tropsch wax products include CIREBELLE 303 (melting point: 51 ° C.), CIREBELLE 305 (melting point: 55 ° C.), CIREBELLE 108 (melting point 79-84 ° C.), and CIREBELLE 109L (melting point 91-96). ℃) can be mentioned.

(A-2) The content of Fishertrophwax having a melting point of 50 to 120 ° C. is 0.2 to 20% by mass as long as the range of the mass ratio described later is satisfied in the total amount of the oil-based solid cleansing cosmetic of the present invention. It is preferably 0.2 to 15% by mass, and even more preferably 0.5 to 12% by mass. When the content of the component (A-2) is in this range, good shape retention (morphological retention), stability and ease of removal during use can be achieved.

In the (A) solid oil according to the present invention, the ratio of the component (A-1) to the component (A-2) is (A-1) :( A-2) = 20: 75 to 95: 5 in terms of mass ratio. It is preferably 25:70 to 90:10, and more preferably 30:60 to 80:20. By using both in combination within this range, the effect of the present invention that a high oil solidifying ability can be obtained even if a solid oil having a low melting point is used can be obtained.

In the (A) solid oil according to the present invention, the total amount of the (A-1) component and the (A-2) component is preferably 50% by mass or more, more preferably 50% by mass or more, based on the total amount of the (A) solid oil. Is 60% by mass or more. If the total amount of the component (A-1) and the component (A-2) is less than 50% by mass, a sufficient oil solidifying ability cannot be obtained.

The solid oil (A) according to the present invention may contain (A-3) hydrogenated castor oil in addition to the components (A-1) and (A-2). By containing hydrogenated castor oil, it is possible to improve the oil retention ability when the oil is solidified, and it is possible to prevent the liquid oil from seeping out from the oil gel. Further, by containing hydrogenated castor oil, liquid oils having various polarities can be solidified.

As the hydrogenated castor oil, a commercially available product can be used. Examples of the commercially available product include castor hard (melting point 86 ° C., manufactured by Kawaken Fine Chemicals Co., Ltd.) and castor hardened oil A (melting point 85 ° C., manufactured by Itoh Oil Chemicals Co., Ltd.). ) Etc. can be mentioned. These may be used alone or in combination of two or more.

The content of hydrogenated castor oil is preferably 1 to 50% by mass, more preferably 5 to 40% by mass, based on the total amount of (A) solid oil. The content of hydrogenated castor oil is preferably 0.2 to 14% by mass, more preferably 0.5 to 12% by mass, and further preferably 1 to 10 with respect to the total oily solid cleansing cosmetics. It is mass%.

The oily solid cleansing cosmetic of the present invention can be produced by separately blending each solid oil component constituting (A) solid oil, but the solid oil component is uniformly melt-mixed in advance to form a solid oil composition. Therefore, it is preferable to use it for the production of oil-based solid cleansing cosmetics. For example, the solid oil composition according to the present invention can be produced by heating and melting at a temperature equal to or higher than the melting point of each component at a predetermined blending ratio to homogenize and then cooling. This solid oil composition may be molded into an arbitrary shape such as flakes or granules when cooled after heating and melting.

Since the melting point of the solid oil composition is lower than the highest melting point of a single solid oil component, in the production of oily solid cleansing cosmetics, by blending as a solid oil composition, other than solid oil can be used. In particular, deterioration of beauty ingredients such as surfactants and vitamins due to heating can be suppressed.

In the present specification, for convenience, an oil having a melting point of 50 ° C. or higher, which is a solid oil at room temperature, is referred to as a solid oil, and an oil having a melting point of less than 50 ° C. is referred to as a liquid oil. An oil having a melting point of 35 ° C. or higher and lower than 50 ° C. may be referred to as a semi-solid oil, but it is included in the liquid oil.

The oily solid cosmetics of the present invention may contain other solid oils other than (A-1), (A-2) and (A-3). Specific examples of such solid oil include hydrocarbon waxes such as paraffin wax, polyethylene wax, ethylene-propylene copolymer, microcrystallin wax, selecin, and ozokerite, and mokurou, carnauba wax, candelilla wax, and rice wax. , Animal and vegetable waxes such as beeswax, hydrogenated jojoba oil, hardening oil, higher alcohol, silicone wax and the like. Among other solid oils other than (A-1), (A-2) and (A-3), the use of animal and plant waxes, hydrogenated jojoba oils, hydrogenated oils and higher alcohols is preferable from the viewpoint of biodegradability. .. It is preferable not to contain polyethylene wax, microcrystalline wax, ethylene-propylene copolymer and silicone wax having poor biodegradability, and even if they are contained, the content is preferably 5% by mass or less, more preferably 5% by mass or less in the total amount of cosmetics. It is 2% by mass or less, more preferably 1% by mass or less.

(B) Liquid oil The (B) liquid oil used in the present invention is a semi-solid to liquid oil at room temperature having a melting point of less than 50 ° C. It is not particularly limited as long as it is used for ordinary cosmetics, and may be any of animal oil, vegetable oil, and synthetic oil. Specific examples of the liquid oil include ethylhexyl palmitate, tri (capril / capric acid) glyceryl, triethylhexanoin, dicapryryl carbonate, diisostearyl malate, diglyceryl triisostearate, decaglyceryl decaisostearate, dimer acid and dimer. Oligoester with diol, pentaerythrit tetraisostearate, diglyceryl tetraisostearate, cetyl ethylhexanate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, neopentyl glycol dioctanoate, cholesterol fatty acid ester, jojoba oil, etc. Esters; Hydrocarbons such as volatile isoparaffin, polybutene, polyisobutylene, heavy liquid isoparaffin, liquid paraffin, α-olefin oligomer, squalane, vaseline; fats and oils such as olive oil, castor oil, mink oil, macadamian nut oil, etc. Classes; fatty acids such as isostearic acid and oleic acid; higher alcohols such as oleyl alcohol and isostearyl alcohol; low degree of polymerization dimethylpolysiloxane, cyclic silicone, high degree of polymerization dimethylpolysiloxane, methylphenylpolysiloxane, methyltrimethicone, Silicone oils such as caprylyl trimeticone, crosslinked organopolysiloxane, fluorine-modified polysiloxane; fluorine-based oils such as perfluoropolyether; lanolin derivatives such as lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin alcohol; etc. Can be mentioned.

Esters are preferably used from the viewpoint of removability of makeup stains and ease of washing, and ethylhexyl palmitate, tri (capryl / capric acid) glyceryl, triethylhexanoin, and dicaprylyl carbonate are preferably used.

The content of the liquid oil (B) in the total amount of the oily solid cleansing cosmetics is 50 to 97% by mass, preferably 55 to 95% by mass, and more preferably 60 to 92% by mass. When the content of the liquid oil is in this range, good shape retention (morphological retention), stability and ease of removal during use can be achieved.

(C) Non-ionic surfactant In the oil-based solid cleansing cosmetic of the present invention, a non-ionic surfactant having an HLB value in the range of 5 to 13 is used as the component (C). Here, the "nonionic surfactant having an HLB value in the range of 5 to 13" is one kind of nonionic surfactant having an HLB value in the range of 5 to 13, or an HLB in the range. The weighted average HLB value is in the range of 5 to 13 as a result of a combination of multiple nonionic surfactants having values or a combination of two or more nonionic surfactants having different HLB values. It means that it is a combination of a plurality of nonionic surfactants.

HLB is an index showing the balance between hydrophilicity and lipophilicity as a value from 0 to 20, and the closer it is to 0, the higher the lipophilicity, and the closer it is to 20, the higher the hydrophilicity. Various calculation methods are known as HLB value calculation methods, and the values are described in catalogs and the like provided by manufacturers. In the present specification, the HLB value of the nonionic surfactant adopts the HLB value described in the manufacturer's catalog when the nonionic surfactant is a commercially available product, and is not a commercially available product. In this case, the method of Griffin described in "Surfactant Handbook", page 307 (published by Sangyo Tosho Co., Ltd., published in 1960) (HLB value = 20 x total / molecular weight of the formula of the hydrophilic part). ) Is used.

If the HLB value of the non-ionic surfactant is less than 5, even if you try to rinse the makeup with water or lukewarm water after applying the makeup on the skin, it will not be compatible with water, so wash it off cleanly. I can't do it, and I can't get a refreshing feeling after rinsing. On the contrary, when the HLB value exceeds 13, the hydrophobic makeup cannot be blended with the cleansing cosmetic, and the makeup removal becomes insufficient. Above all, when the HLB value is in the range of 6 to 11, the make-up removal and the ease of washing off are good. The non-ionic surfactant of the component (C) may be either solid or liquid, but when a non-ionic surfactant liquid at 25 ° C. is used, it has better performance in terms of make-up removal and ease of washing. Is obtained.

Specific examples of the nonionic surfactant having an HLB value of 5 to 13 used as the component (C) and the nonionic surfactant having an HLB value within the above range when used in combination are polyglyceryl stearate-4. Polyglycerin fatty acid esters such as polyglyceryl-2 oleate, polyglyceryl-2 isostearate, polyglyceryl-10 distearate; polyoxyethylene hydrogenated castor oil such as PEG-10 hydrogenated castor oil, PEG-20 hydrogenated castor oil; stearer Polyoxyethylene fatty acid esters such as PEG-2 acid and PEG-5 stearate; polyoxyethylene alkyl ethers such as Ceteth-2, Oles-3 and Steareth-6; Steareth stearate-6, Laures isostearate-8, stearer Acid steares-12 and other fatty acid polyoxyethylene alkyl ethers; PEG-3 glyceryl isostearate, PEG-15 glyceryl tristearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-20 triisostearate Polyoxyethylene fatty acid glyceryl such as glyceryl and PEG-20 glyceryl tristearate; fatty acid polyoxyethylene hydrogenated castor oil such as PEG-15 hydrogenated castor oil isostearate and PEG-20 hydrogenated castor oil triisostearate; etc. Be done. In addition, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene polyoxypropylene copolymer, ether of polyoxyethylene polyoxypropylene copolymer and long chain alcohol, ether of polybutylene glycol polyglycerin copolymer and long chain alcohol, etc. Can be mentioned. Among them, polyoxyethylene fatty acid ester, polyoxyethylene fatty acid glyceryl, fatty acid polyoxyethylene hydrogenated castor oil and fatty acid polyoxyethylene alkyl ether are preferably used from the viewpoint of make-up removal and ease of washing.

(C) When the nonionic surfactant used as a component has a fatty acid residue in the molecule, the fatty acid residue has a carbon number such as myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid and the like. It is preferably a residue of 10 to 22 higher fatty acids, and more preferably a residue of a branched higher fatty acid having a liquid nonionic surfactant and excellent oxidation resistance stability, particularly isostearic acid residue. Groups are preferred.

Examples of commercially available nonionic surfactants liquid at 25 ° C. used as the component (C) include Emarex RWIS-320 (PEG-20 triisostearate hydrogenated castor oil; manufactured by Nippon Emulsion Co., Ltd .; HLB value 6). ), Emarex GWIS-305 (PEG-5 glyceryl triisostearate; manufactured by Nippon Emulsion Co., Ltd .; HLB value 3), Uniox GT-20IS (PEG-20 glyceryl triisostearate; manufactured by Nichiyu Co., Ltd .; HLB value 10.4) ), Etc., and examples of commercially available products that are solid at 25 ° C. include Emarex GWS-320 (PEG-20 glyceryl tristearate; manufactured by Nippon Emulsion Co., Ltd .; HLB value 8), Emarex SWS-12 ( Steareth stearate-12; manufactured by Nippon Emulsion Co., Ltd .; HLB value 8), Emarex 608 (Stairless-8; manufactured by Japan Emulsion Co., Ltd .; HLB value 9) and the like. Since Emarex GWIS-305 has a low HLB value, it is used in combination with other nonionic surfactants.

The amount of the component (C) used is 2 to 40% by mass, preferably 4 to 35% by mass, more preferably 5 to 30% by mass, and particularly preferably 7 to 25% by mass in the total amount of the oily solid cleansing cosmetics. .. If this amount is excessively small, the ease of removing makeup and washing off will decrease, and if it is excessively large, there is concern about irritation to the skin.

The oily solid cleansing cosmetic of the present invention may contain a small amount of water. The content of water is preferably 5% by mass or less of the total cosmetics, and if it is within that range, the nonionic surfactant of component (C) and water are in a solubilized state, that is, an oily component as a dispersion medium. Exists, and the component (C) and water form a reverse micelle. As a result, the non-ionic surfactant of the component (C) is easily dissolved in the oil agent, and the component (C) is not separated or precipitated even after long-term storage, and the storage stability is improved. In particular, the effect is remarkable when the water content is 0.1 to 3% by mass.

The oil-based solid cleansing cosmetic of the present invention contains components used in ordinary cosmetics, such as powders, dyes, oil-based gelling agents, oil-soluble resins, polyhydric alcohols, lower alcohols, ultraviolet absorbers, and ultraviolet scattering agents. , Moisturizers, fragrances, antioxidants, preservatives, defoamers, cosmetological ingredients, various extracts and other additives can be contained within a range that does not impair the effects of the present invention.

The oil-based solid cleansing cosmetic of the present invention does not exhibit fluidity at normal temperature (25 ° C.) and normal pressure (1 atm), and its shape is not particularly limited. Specific examples of the shape include stick-shaped, rod-shaped, plate-shaped, and cast-molded ones into containers. These various cleansing cosmetics can be prepared according to a conventional method. For example, all the raw materials can be heated to a melting point or higher, mixed uniformly, and then poured into a container, a mold, or the like in a molten state to be cooled or allowed to cool to obtain an oil-based solid cleansing cosmetic.

As a preferable production method, the solid oil (A) containing the components (A-1) and (A-2) is uniformly melt-mixed in advance at a temperature equal to or higher than the melting point to obtain a solid oil composition, which is combined with the solid oil composition. (B) A manufacturing method including a step of melting and mixing with other components including liquid oil can be mentioned. By adopting such a production method, it is possible to prepare (C) while preventing deterioration of components sensitive to heating such as beauty components such as surfactants and vitamins. When an oil-based solid cleansing cosmetic is produced using a solid oil composition, it is preferably produced at a temperature of 85 ° C. or lower, more preferably 82 ° C. or lower.

The oily solid cleansing cosmetic of the present invention has the characteristics required for a massage cosmetic, that is, appropriate viscosity, slipperiness and durability of slipperiness, in addition to the function of removing makeup. Therefore, apart from the oil-based solid cleansing cosmetic of the present invention, it can also be used as a massage cosmetic. When using the oil-based solid cleansing cosmetic of the present invention, the makeup can be removed by immersing the makeup in the makeup and then rinsing with water or lukewarm water. Therefore, when using a conventional oil-based solid cleansing cosmetic, it is possible to omit the facial cleansing operation using a face wash such as soap, which is considered necessary after use.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. The blending amount in the composition in the following description is mass% with respect to the total amount unless otherwise specified.

<Solid oil composition>
The evaluation method of the solid oil composition according to the present invention in the following production examples and comparative production examples is as follows.

(Melting point)
Melting point measurement method 2 (hardness), which is a general test method for quasi-drug raw material standards
94 parts by mass of cleansing oil having the composition shown in Table 1 and 6 parts by mass of each solid oil composition of Examples and Comparative Examples were heated and mixed at 90 ° C. to uniformly dissolve them, and then a cylinder having an inner diameter of 56 mm was maintained at a temperature of 90 ° C. 50 g of the composition was poured into a polypropylene container and allowed to cool overnight in a constant temperature bath at 25 ° C. to obtain an oil gel, and the hardness of the oil gel was measured by the following method.
Using a Sun Rheometer CR-100 (manufactured by Sun Scientific Co., Ltd.), a maximum stress of 2 KG, and a 10 mmφ disc needle adapter, a needle insertion speed of 20 mm / min. Then, the needle was inserted to a depth of 10 mm, and the average stress at the needle insertion depth of 2 to 8 mm was defined as the hardness (gf).

※１：商品名 ユニオックスＧＴ２０−ＩＳ（日油社製）
※２：商品名 エマレックスＧＷＩＳ−３０５（日本エマルジョン社製）
※ 表1において非イオン性界面活性剤の加重平均のＨＬＢ値は、９．４７５ Cleansing oil prescription

* 1: Product name Uniox GT20-IS (manufactured by NOF CORPORATION)
* 2: Product name Emarex GWIS-305 (manufactured by Nippon Emulsion Co., Ltd.)
* In Table 1, the weighted average HLB value of nonionic surfactants is 9.475.

(Production Examples 1 to 5, Comparative Production Examples 1 to 5)
The solid oil composition having the composition shown in Table 2 was produced according to the following production method. The melting point of the solid oil composition and the hardness of the solid oil composition and the cleansing oil shown in Table 1 when they were heated and dissolved and then allowed to cool to form an oil gel were evaluated by the above method. The evaluation results are shown in Table 2. In FIG. 1, the ratio of behenic behenate (A-1) to Fischer-Tropschwax (A-2) (A-1) / [(A-1) + ( A-2)] (% by mass) and a graph showing the relationship between hardness and melting point are shown.

(Production method)
The solid oil having the composition shown in Table 2 was melted at 95 ° C., mixed uniformly, and then allowed to cool to room temperature to obtain a solid oil composition.

※３：商品名 ＣＩＲＥＢＥＬＬＥ １０８（ＣＩＲＥＢＥＬＬＥ社製）
※４：商品名 ＰＥＲＦＯＲＭＡＬＥＮＥ５００（ニューフェーズテクノロジー社製）

* 3: Product name CIREBELLE 108 (manufactured by CIREBELLE)
* 4: Product name PERFORMALENE500 (manufactured by New Phase Technology)

As is clear from FIG. 1, the melting points of the solid oil composition, which is a mixture of the components (A-1) and (A-2), are the melting points of the components (A-1) and (A-2), respectively. However, the hardness of the oil gel with the solid oil composition as a mixture was significantly higher than the value predicted from the hardness of the single component. In particular, when the ratio (A-1) / [(A-1) + (A-2)] (mass%) is in the range of 20/95 to 95/100, high hardness can be obtained despite the low melting point. I understand. Comparative Production Example 4 in which the Fischer-Tropsch wax of Production Example 3 was replaced with a general-purpose polyethylene wax had a high melting point and a lower hardness of the oil gel than that of Production Example 3. In the combination of behenic behenate and candelilla wax of Comparative Production Example 5, only extremely low oil gel hardness was obtained. The solid oil composition of Production Example 5 containing hydrogenated castor oil also showed a low melting point and a high oil solidifying ability.

<Oil solid cleansing cosmetics>
The evaluation method of the oily solid cleansing cosmetic of the present invention in the following Examples and Comparative Examples is as follows.

(hardness)
The sample was heated and dissolved at 90 ° C., 50 g of cosmetics was poured into a tubular polypropylene container having an inner diameter of 56 mm, allowed to cool overnight in a constant temperature bath at 25 ° C., and the hardness (gf) was measured by the following method.
Using a Sun Rheometer CR-100 (manufactured by Sun Scientific Co., Ltd.), a maximum stress of 2 KG, and a 10 mmφ disc needle adapter, a needle insertion speed of 20 mm / min. Then, the needle was inserted to a depth of 10 mm, and the average stress at the needle insertion depth of 2 to 8 mm was taken as the hardness.

(Retainability)
Judgment was made from the hardness value according to the following criteria.
A: Hardness 300 or more B: Hardness 200 or more and less than 300 C: Hardness 100 or more and less than 200 D: Hardness less than 100

(Easy to stretch, easy to remove makeup, easy to wash off)
After applying a commercially available powder foundation (Cezanne UV Foundation EX Plus, manufactured by Cezanne Cosmetics Co., Ltd.) to the skin by 10 female evaluation panels with makeup experience, cleansing with a sample for evaluation was performed, and each item was described in (1) below. Based on the evaluation criteria shown, grades were given on a scale of 1 to 5. The average value of the scores of the 10 evaluators was calculated, and the performance as a cleansing cosmetic was judged according to the 4-step judgment criteria shown in (2) below.

(1) Evaluation criteria 5 points: Good 4 points: Somewhat good 3 points: Neither can be said 2 points: Somewhat bad 1 point: Bad

(2) 4-step judgment criteria A: Average score is 4 or more and 5 or less B: Average score is 3 or more and less than 4 C: Average score is 2 or more and less than 3 D: Average score is less than 2

Examples 1 to 3 and Comparative Examples 1 to 4
(Oil solid cleansing cosmetics)
The oily solid cleansing cosmetics of the formulations shown in Table 3 were prepared according to the following production procedure. The obtained oil-based solid cleansing cosmetics were evaluated for hardness, shape retention, uniformity, ease of spreading, good makeup removal, and ease of washing off by the above methods. The evaluation results are shown in Table 3.

(Manufacturing procedure)
(1) The components 1 to 14 shown in Table 3 are heated to 82 ° C. and mixed uniformly.
(2) The mixed solution prepared in (1) above is filled in a jar container at 70 ° C. in a molten state and then allowed to cool to obtain an oil-based solid cleansing cosmetic.

From the results in Table 3, the oil-based solid cleansing cosmetics of Examples 1 to 3 had sufficient shape-retaining properties that were easy to carry, and formed a uniform oil gel even at a relatively mild production temperature of 82 ° C. It was easy to spread, easy to remove makeup, and easy to wash off. On the other hand, the cosmetics of Comparative Example 1 containing only Fischer-Tropsch wax containing no behenic acid as a solid oil component and Comparative Example 2 containing polyethylene wax could not be completely melted at the same production temperature and were uniform. Since the oil gel could not be formed, the hardness was low and sufficient shape retention could not be obtained. The cosmetic of Comparative Example 3 containing candelilla wax and behenic behenate as solid oil components had insufficient shape retention. The cosmetic of Comparative Example 4 containing no non-ionic surfactant was inferior in the make-up remover and wash-off performance.

According to the present invention, an oil-based solid cleansing cosmetic having excellent cleansing performance, easy to manufacture, and excellent biodegradability is provided.

Claims (5)

(A) 1 to 30% by mass of solid oil having a melting point of 50 to 120 ° C., (B) 50 to 97% by mass of liquid oil, and (C) 2 nonionic surfactants having an HLB value of 5 to 13. An oily solid cleansing cosmetic containing in a proportion of ~ 40% by mass (ratio in the total amount of cosmetics), wherein the solid oil (A) has (A-1) behenyl behenate and (A-2) melting point. An oil-based solid cleansing cosmetic containing Fishertrophwax at 50 to 120 ° C. in a mass ratio of (A-1) :( A-2) = 20: 75 to 95: 5. Claim 1 in which the sum of the contents of the component (A-1) and the component (A-2) in the solid oil of (A) is 50% by mass or more with respect to the total solid oil of (A). Oily solid cleansing cosmetics described in. The oily solid cleansing cosmetic according to claim 1 or 2, wherein the solid oil of (A) further contains (A-3) hydrogenated castor oil in an amount of 1 to 50% by mass based on the total solid oil of (A). .. The oily solid according to any one of claims 1 to 3, which contains 0.5 to 25% by mass of the component (A-1) and 0.2 to 20% by mass of the component (A-2) with respect to the entire cosmetic. Cleansing cosmetics. A solid containing (A-1) behenyl behate and (A-2) Fishertropsh wax having a melting point of 50 to 120 ° C. in a mass ratio of (A-1) :( A-2) = 20: 75 to 95: 5. A method for producing an oil-based solid cleansing cosmetic, which comprises a step of melting an oil composition together with a liquid oil.

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