Oil agent for cosmetics and cosmetic composition

Abstract

To provide an oil agent for cosmetics which uses vegetable oil as a natural botanical raw material, has satisfactory spreadability, excellent extensibility, and also has excellent oxidation stability.SOLUTION: Provided is an oil agent for cosmetics that contains (A) vegetable oil which is liquid at 25°C and (B) phospholipid or lysophospholipid, and in which a content of the (B) component is 0.01 to 20 mass%. By using the oil agent for cosmetics, a cosmetic composition which uses vegetable oil as a natural botanical raw material, and has satisfactory spreadability and excellent extensibility can be provided.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cosmetic oil agent containing natural plant raw materials. In particular, the present invention relates to a cosmetic composition containing natural plant raw materials, which has good spreadability and an excellent feel when used. [Background technology]

[0002] Oils have traditionally been used as raw materials for cosmetic compositions. Liquid oils include, for example, hydrocarbons, silicone oils, esters, and fats and oils, and are used to moisturize the skin and improve the gloss and ease of running hair. These oils are required to have good spreadability and extensibility when applied to the skin or hair.

[0003] For example, Patent Document 1 discloses an oil containing an ester of a dimer diol and a monocarboxylic or dicarboxylic acid having 4 to 34 carbon atoms. This oil is used as a raw material for cosmetic compositions, and provides cosmetic compositions that are excellent in safety, stability, hydrolysis resistance, and gloss, and have a good feel when used. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-072530 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, there has been a demand for measures to reduce environmental impact, and the use of natural plant-based raw materials has been considered as environmentally friendly raw materials. Among liquid oils, vegetable oils have attracted attention as natural plant-based raw materials, but vegetable oils have poor spreadability and do not provide a good feel when used. Furthermore, vegetable oils have poor oxidation stability and poor storage stability compared to mineral oils and the like. Therefore, an object of the present invention is to provide a cosmetic oil agent that uses vegetable oils and fats as natural plant raw materials and that has good spreadability, excellent extensibility, and excellent oxidation stability. [Means for solving the problem]

[0006] As a result of intensive research into the above-mentioned problems, the inventors discovered that the spreadability of vegetable oils can be improved by including phospholipids or lysophospholipids in vegetable oils in a specific ratio, and thus completed the present invention. That is, the present invention provides a cosmetic oil agent and a cosmetic composition characterized as follows:

[0007] The cosmetic oil agent of the present invention, which solves the above-mentioned problems, is characterized by containing (A) a vegetable oil that is liquid at 25°C and (B) a phospholipid or lysophospholipid, and the content of component (B) is 0.01 to 20 mass%. According to the present invention, by adding a phospholipid or a lysophospholipid to liquid vegetable oil, the coefficient of friction of the vegetable oil can be reduced and the spreadability can be improved. Furthermore, by adding a phospholipid or a lysophospholipid to vegetable oils and fats, the oxidation stability can be improved.

[0008] In one embodiment of the cosmetic oil of the present invention, component (B) is a phospholipid derived from corn or rice. This feature makes it possible to provide an oil agent with excellent oxidation stability.

[0009] The cosmetic composition of the present invention, which has been designed to solve the above-mentioned problems, is characterized by containing the above-mentioned cosmetic oil agent of the present invention. According to this feature, it is possible to provide a cosmetic composition that has good spreadability and excellent extensibility while using natural vegetable oils and fats. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a cosmetic oil agent that has good spreadability, excellent extensibility, and excellent oxidation stability while using vegetable oils and fats as natural plant raw materials. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the cosmetic oil agent and cosmetic composition according to the present invention will be described in detail. It should be noted that the cosmetic oils and cosmetic compositions described as embodiments are merely examples used to explain the cosmetic oils and cosmetic compositions according to the present invention, and are not intended to be limiting.

[0012] [Cosmetic oils] The cosmetic oil of the present invention is characterized by containing (A) a vegetable oil that is liquid at 25°C and (B) a phospholipid or lysophospholipid, and the content of component (B) is 0.01 to 20% by mass. The cosmetic oil of the present invention has good spreadability and excellent extensibility due to the inclusion of phospholipids or lysophospholipids in natural vegetable oils and fats. Therefore, by using the cosmetic oil in cosmetic compositions such as basic cosmetics, a cosmetic composition that has good spreadability and an excellent feel in use can be provided. Furthermore, since the cosmetic oil of the present invention has the property of blending well with oily cosmetics such as concealer and lipstick, it can also be used as a cleansing oil.

[0013] ((A) Vegetable oil that is liquid at 25°C) The vegetable oil used in the present invention is one that is liquid at 25°C. Examples include corn oil, rice bran oil, rapeseed oil, soybean oil, olive oil, palm oil, palm kernel oil, coconut oil, sunflower oil, safflower oil, cottonseed oil, sesame oil, linseed oil, MCT oil, etc. Corn oil, rice bran oil, soybean oil, sunflower oil, and rapeseed oil are vegetable oils that contain phospholipids, and are preferred from the viewpoint that phospholipids contained in crude oil can be utilized by adjusting the degree of refinement.

[0014] Vegetable oils and fats can be obtained by refining crude oil using a conventional refining method, but it is preferable to adjust the degree of refining so that the phospholipids contained in the crude oil remain, thereby allowing the cosmetic oil agent of the present invention to be easily obtained.

[0015] ((B) Phospholipids or Lysophospholipids) The phospholipids or lysophospholipids used in the present invention are those recovered as an acetone-insoluble fraction in a general oil refining process. In the cosmetic oil of the present invention, the acetone-insoluble fraction may be added to the vegetable oil as a phospholipid, or the degree of purification may be adjusted so that the acetone-insoluble fraction remains in the vegetable oil as a phospholipid. The acetone-insoluble fraction may be further purified to concentrate the phospholipids for use. Lysophospholipids are phospholipids having one acyl group, and can be obtained by decomposing and removing the acyl group from a phospholipid using an enzyme or the like.

[0016] Phospholipids or lysophospholipids can be obtained from plants, egg yolk, etc. For example, those contained in crude vegetable oils such as corn oil, rice bran oil, soybean oil, sunflower oil, and rapeseed oil may be used, or those obtained from egg yolk may be used. Phospholipids or lysophospholipids derived from plants are preferred from the viewpoint of being easily available since they are removed during the refining process of vegetable oils. Furthermore, from the viewpoint of excellent oxidation stability, those derived from corn oil or rice bran oil, which have a low content of linolenic acid as a constituent fatty acid, are even more preferred.

[0017] The content of phospholipid or lysophospholipid in the cosmetic oil of the present invention is 0.01 to 20% by mass. The lower limit is preferably 0.05% by mass or more, more preferably 0.10% by mass or more. The upper limit is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, still more preferably 2% by mass or less, particularly preferably 1% by mass or less, and even particularly preferably 0.50% by mass. If the content of phospholipid or lysophospholipid is less than 0.01% by mass, the effects of the present invention cannot be obtained. On the other hand, if the content of phospholipid or lysophospholipid exceeds 20% by mass, the effects of vegetable oil as a cosmetic oil cannot be exerted. The content of phospholipids or lysophospholipids in cosmetic oils can be determined by the content of acetone insoluble matter measured according to "4.3.1 Acetone insoluble matter" in the Standard Methods for Analysis of Fats, Oils and Related Materials (2013 edition).

[0018] [Cosmetic composition] The cosmetic composition of the present invention is characterized by containing the above-mentioned cosmetic oil agent of the present invention. The cosmetic composition of the present invention uses natural vegetable oils and fats, and therefore can provide cosmetics that have a low environmental impact and are gentle on the skin. It can also provide a cosmetic composition that has good spreadability and excellent extensibility.

[0019] The cosmetic composition is not particularly limited, but includes, for example, basic cosmetics, makeup cosmetics, hair cosmetics, fragrance cosmetics, body cosmetics, and the like. Examples of basic cosmetics include facial cleansers such as cleansing foam, cleansing gel, washing powder, cleansing powder, cleansing cream, cleansing milk, cleansing lotion, cleansing gel, cleansing oil, and cleansing mask; lotions such as softening lotion, astringent lotion, cleansing lotion, and multi-layered lotion; emollient lotion, moisture lotion, milky lotion, nourishing lotion, nourishing milk, skin moisture, moisture emulsion, massage lotion, cleansing lotion, protective emulsion, sun protectant, sun protector, UV care milk, sunscreen, makeup lotion, exfoliating smoother, elbow lotion, hair milk, hand lotion, and body lotion. Examples include emulsions; creams such as emollient cream, nourishing cream, nourishing cream, vanishing cream, moisturizing cream, night cream, massage cream, cleansing cream, makeup cream, base cream, pre-makeup cream, sunscreen cream, suntan cream, hair remover, hair cream, deodorant cream, shaving cream, and exfoliating cream; gels such as cleansing gel and moisturizing gel; soaps such as cosmetic soap, transparent soap, medicated soap, liquid soap, shaving soap, and synthetic cosmetic soap; packs and masks such as peel-off packs, powder packs, washing packs, oil packs, and cleansing masks; and essences such as moisturizing essences, whitening essences, and UV protection essences. Examples of makeup cosmetics include face powders, foundations, lipsticks such as lip gloss and lip balm, blushes, eyeliner, mascara, eye shadow, eyebrow pencil, nail polish, nail polish remover, nail treatment, etc. Examples of hair cosmetics include shampoos such as oil shampoos, cream shampoos, conditioning shampoos, anti-dandruff shampoos, and rinse-in-one shampoos; rinses; hair growth agents; hair foams, hair mousses, hair sprays, hair mists, hair gels, water greases, setting lotions, curler lotions, hair liquids, pomades, tics, hair creams, hair blow dryers, split end coats, hair oils, permanent wave agents, hair dyes, and hair bleaches. Examples of scented cosmetics include perfume, perfume, parfum, eau de parfum, eau de toilette, eau de cologne, solid perfume, scented powder, perfumed soap, body lotion, bath oil, and the like. Examples of body cosmetics include body cleansers such as body shampoo; deodorant cosmetics such as deodorant lotions, deodorant powders, deodorant sprays, and deodorant sticks; bleaches, depilatories, and hair removers; bath additives; and insect repellents such as insect repellent sprays.

[0020] The dosage form is not particularly limited, but examples include oil-in-water (O / W) type, water-in-oil (W / O) type, W / O / W type, O / W / O type emulsion-type cosmetics, oil-based cosmetics, solid cosmetics, liquid cosmetics, paste cosmetics, stick-type cosmetics, volatile oil-type cosmetics, powder cosmetics, jelly-type cosmetics, gel-type cosmetics, paste-type cosmetics, emulsified polymer-type cosmetics, sheet-type cosmetics, mist-type cosmetics, spray-type cosmetics, etc. Examples of dosage forms for external use include ointments, patches, lotions, liniments, and liquid applications.

[0021] The content of the cosmetic oil in the cosmetic composition is not particularly limited, but is, for example, 0.1 to 90% by mass, with the lower limit preferably being 0.5% by mass or more and the upper limit preferably being 50% by mass or less, and more preferably 30% by mass or less.

[0022] The cosmetic composition of the present invention may also contain other ingredients commonly used in cosmetic compositions, such as inorganic pigments, polymer powders, oily raw materials, surfactants, moisturizers, thickeners, polymers, UV protection agents, antioxidants, antioxidant aids, sequestering agents, metallic soaps, whitening agents, anti-wrinkle agents, skin roughness improving agents, acne treatment agents, deodorants, refreshing agents, astringents, antibacterial agents, organic pigments, natural colorings, fragrances, vitamins, and emollients. [Example]

[0023] The present invention will be specifically described below with reference to examples, but the technical scope of the present invention is not limited to these examples.

[0024] [Test 1: Evaluation of usability and cleansing properties] Corn oil containing phospholipids was compared with corn oil not containing phospholipids to examine the effects of the cosmetic oil agent of the present invention on the feel during use and cleansing properties. Example 1 The degree of refinement of crude corn oil was adjusted to refine the corn oil so that phospholipids remained. The phospholipid content was 0.2% by mass. The phospholipid content was determined by the content of acetone insoluble matter measured according to "4.3.1 Acetone Insoluble Matter" in the Standard Methods for Analysis of Fats, Oils, and Related Materials (2013 edition). (Comparative Example 1) Corn refined oil (manufactured by Ohta Oil & Fat Co., Ltd.) was used. Phospholipids were sufficiently removed from the corn refined oil. (Comparative Example 2) Corn refined oil N (manufactured by Ohta Oil & Fat Co., Ltd.) was used. Corn refined oil N had phospholipids sufficiently removed.

[0025] <Evaluation item 1: Usability> An artificial leather "Protein Leather (Sapler)" (manufactured by Ideatex Japan Co., Ltd.) was fixed to a friction tester "KES-SE-SR-U" (manufactured by Kato Tech Co., Ltd.), and 0.1 mL of the oil solution of the examples and comparative examples, which had been adjusted to 40°C, was placed on the artificial leather. A sensor was then set on top of this to measure the MIU (mean coefficient of friction) and MMD (variation of the coefficient of friction). (Measurement conditions) SENS (measurement sensitivity): H (standard sensitivity) Frictional static load: 25g Friction sensor: 10mm square wire sensor Measurement environment: 20°C, 65% Rh (Measurement results) Since the actual measured values ​​showed large variations in data immediately after the start of measurement, data from a movement section of 10 to 25 mm, where relatively stable data was obtained, was extracted and the average value of n = 3 was used. The results are shown in Table 1.

[0026] <Evaluation item 2: Cleansing ability> Concealer or lipstick was applied in a 2 cm diameter circle to artificial leather "Protein Leather (Saplare)" (Ideatex Japan Co., Ltd.), and after drying for 1 hour, one drop of oil solution from the Examples and Comparative Examples was dispensed onto the center of the applied concealer or lipstick using a dropper and left to stand for 1 minute. The oil solution was then massaged into the skin with the pad of a finger in 10 rotations and then exposed to running water for 30 seconds. After the water had finished running, the artificial leather was dried and images were taken with an optical microscope "Digital Microscope" (manufactured by Keyence Corporation). Using the program "Automatic Area Measurement," the images of the artificial leather before and after washing were analyzed, and the total area where concealer or lipstick had been applied was calculated. The cleansing rate was calculated using the following formula. The results are shown in Table 1. (calculation formula) JPEG2025174303000001.jpg9170

[0027] [Table 1]

[0028] Referring to Table 1, vegetable oils containing phospholipids had a lower coefficient of friction (MIU) compared to vegetable oils not containing phospholipids. These results demonstrate that the inclusion of phospholipids improves the spreadability and smoothness of vegetable oils, improving the feel when applied.

[0029] Furthermore, the vegetable oil containing phospholipids had a higher cleansing rate than vegetable oil not containing phospholipids. These results demonstrate that the inclusion of phospholipids improves the cleansing ability of oily cosmetics such as concealers and lipsticks.

[0030] [Test 2: Evaluation of oxidation stability] Corn oil containing phospholipids was compared with corn oil not containing phospholipids to verify the effect of the cosmetic oil of the present invention on oxidation stability. Example 2 The degree of refinement of crude corn oil was adjusted to refine the corn oil so that phospholipids remained. The phospholipid content was 2.0% by mass. The phospholipid content was determined by the content of acetone insoluble matter measured according to "4.3.1 Acetone Insoluble Matter" in the Standard Methods for Analysis of Fats, Oils, and Related Materials (2013 edition). (Example 1, Comparative Example 1) The same oil as in Test 1 above was used.

[0031] <Evaluation item 3: Oxidation stability> The CDM value was measured using an "892 Professional Rancimat" (Metrohm Japan Co., Ltd.). The measurement results are shown in Table 2. The CDM value indicates the time of the inflection point at which the electrical conductivity of the oil increases sharply; the higher the CDM value, the less likely it is that volatile decomposition products will be generated from hydroperoxides of primary oxides, and the less likely the vegetable oil is to undergo autoxidation or thermal oxidation (the more stable it is).

[0032] [Table 2]

[0033] Referring to Table 2, it can be seen that the CDM value increases as the phospholipid content increases, meaning that the greater the phospholipid content, the better the oxidation stability. [Industrial Applicability]

[0034] The cosmetic oil of the present invention has good spreadability and excellent extensibility, and therefore can be suitably used in cosmetic compositions. In particular, it can be suitably used in natural cosmetics that use natural vegetable oils. Furthermore, it can be suitably used in cosmetic compositions that are applied to the skin as skin-friendly cosmetics.

[0035] The cosmetic oil of the present invention also has excellent cleansing properties and can therefore be suitably used in facial cleansers such as cleansing oils.

Claims

1. (A) vegetable oil that is liquid at 25°C; and (B) a phospholipid or a lysophospholipid, A cosmetic oil agent characterized in that the content of the component (B) is 0.01 to 20% by mass.

2. 2. The cosmetic oil agent according to claim 1, wherein the component (B) is a phospholipid derived from corn or rice.

3. A cosmetic composition comprising the cosmetic oil agent according to claim 1 or 2.

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