Oily solid cosmetic

Abstract

To develop an oily solid cosmetic in which properties of a preparation is stable regardless of a temperature, and which has usability that the cosmetic can be easily scooped when used, and can be spread on a palm.SOLUTION: An oily solid cosmetic contains the following components (A) to (C): (A) an oil having a melting point of 26°C to 40°C; (B) a wax having a melting point of 70°C to 90°C; and (C) isostearic acid, wherein a content of (A) is 30 to 70 mass%, a content of (B) is 5 to 20 mass%, and a content of (C) is 10 to 65 mass%.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-based solid cosmetic preparation comprising (A) an oil having a melting point of 26° C. to 40° C., (B) a wax having a melting point of 70° C. to 90° C., and (C) isostearic acid. [Background technology]

[0002] Compared to liquid cosmetics, oil-based solid cosmetics do not spill when taken into the hand, there is no risk of leakage from the container, and they are convenient to carry, so they have a wide range of uses as formulations. However, while oil-based solid cosmetics are convenient, they also have many issues, and since the formulation itself is highly temperature-dependent, it is necessary that they do not cause hardness changes, sweating, or oil separation. In addition, when used, they are required to be easy to use and can be easily removed with fingers.

[0003] However, due to their characteristics, many oil-based solid cosmetics lose their hardness under high temperature conditions, and conversely, under low temperature conditions, the formulation solidifies, making them difficult to use when applying with fingers or spreading on the palm of the hand.

[0004] Therefore, an object of the present invention is to provide an oil-based solid cosmetic preparation which maintains the temperature stability of the preparation under high and low temperature conditions and is easy to use.

[0005] Patent Document 1 discloses an oil-based solid cosmetic preparation that contains one or more selected from vegetable waxes having a melting point of 70°C or higher, esters of dimer acids having a melting point of 30°C or higher but lower than 60°C, and fatty acid hydrogenated castor oils having a melting point of 30°C or higher but lower than 60°C, and an ester oil that is liquid at 25°C and is obtained by esterifying a fatty acid with a polyhydric alcohol.

[0006] Patent Document 2 discloses a hair styling composition that contains sunflower seed wax, one or more types selected from waxes and hydrocarbons having a melting point of 70°C or higher, hydroxystearic acid, stearic acid, a higher alcohol having 12 to 22 carbon atoms, an oily component that is liquid at 25°C, a water-soluble polymer, and a nonionic surfactant.

[0007] Patent Document 3 devisees a hair styling composition containing 4% by mass or more of sunflower seed wax or 2% by mass or more of rice bran wax having an iodine value of 3.0 or less, and an oil that is liquid at 25°C.

[0008] Patent Document 4 devisees a wax-like composition for cosmetics, which contains a polyester having a weight-average molecular weight of 30,000 to 1,000,000 and which contains one or both of a dimer acid and a dimer diol as a constituent unit, and one or more waxes selected from the group consisting of ester wax, hydrocarbon wax, solid higher alcohol, and higher fatty acid. However, the compositions of Patent Documents 1 to 4 did not provide satisfactory results in terms of achieving both temperature stability and ease of use. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent Publication No. 2020-40917 [Patent Document 2] Patent Publication No. 2020-37516 [Patent Document 3] Patent Publication No. 2019-163235 [Patent Document 4] Patent Publication No. 2018-123117 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, an object of the present invention is to develop an oil-based solid cosmetic preparation whose formulation properties are stable regardless of temperature, and which can be easily removed with fingers and spread on the palm of the hand upon use. [Means for solving the problem]

[0011] As a result of intensive research aimed at solving the above-mentioned problems, the present inventors have found that the above-mentioned problems can be solved by an oil-based solid cosmetic preparation comprising the following components (A) to (C), wherein the content of (A) is 30 to 70% by mass, the content of (B) is 5 to 20% by mass, and the content of (C) is 10 to 65% by mass, and have thus completed the present invention. (A) Oil with a melting point of 26°C to 40°C (B) Wax with a melting point between 70℃ and 90℃ (C) Isostearic acid Effect of the Invention

[0012] The oil-based solid cosmetic composition of the present invention is stable even under high and low temperature conditions due to seasonal temperature fluctuations, has good usability, and is versatile enough to be applied to various dosage forms, and is particularly effective as a hair styling product. In this invention, the high temperature condition refers to 50°C, and the low temperature condition refers to 5°C. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The oily solid cosmetic preparation of the present invention contains the following components (A) to (C), and is characterized in that the content of (A) is 30 to 70 mass%, the content of (B) is 5 to 20 mass%, and the content of (C) is 10 to 65 mass%. (A) Oil with a melting point of 26°C to 40°C (B) Wax with a melting point between 70℃ and 90℃ (C) Isostearic acid

[0014] The oily solid cosmetic preparation of the present invention contains substantially no water. Here, "substantially no water" means that the preparation contains no water at all or less than 0.5% water. In addition, the definition of the melting point in the present invention refers to the temperature measured according to the second method of the Japanese Industrial Standards 2021.

[0015] The oil (A) having a melting point of 26°C to 40°C in the present invention is a solid or pasty oil at room temperature (15 to 25°C). The solid or pasty oil referred to here is a vegetable oil, an animal oil, a synthetic oil, a semi-synthetic oil, an ester oil, a hydrocarbon, a mineral oil, an ether, a silicone oil, etc., and is not particularly limited as long as it is an oil having a melting point of 26°C to 40°C. Specifically, examples of (A) include cacao butter (32 to 39), palm oil (27 to 50), palm kernel oil (25 to 30), coconut oil (20 to 28), horse fat (29 to 50), shea butter (28 to 45), lanolin (wool fat) (37 to 43), petrolatum (38 to 60), mango seed fat (26 to 36), ethyl stearate (34), myristyl myristate (36 to 46), ricinol, etc. Examples of the oil include cetyl ester (24-32), dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (38-40), dimer dilinoleate dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl) (38-40), (acrylates / stearyl acrylate / dimethicone methacrylate) copolymer (25-35). The parentheses indicate the melting point (°C) of the oil. Preferably, one or more selected from mango seed oil, shea butter, lanolin (wool fat), petrolatum, and dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl). For components with a range of melting points, raw materials that satisfy the condition of a melting point of 26°C to 40°C are used in the present invention.

[0016] The content of (A) in the present invention is 30 to 70% by mass, preferably 35 to 65% by mass, and more preferably 40 to 60% by mass. If the content of (A) is too low, the product will be too hard and difficult to pick up with fingers, whereas if the content of (A) is high, the product will melt at high temperatures, resulting in loss of value.

[0017] The wax (B) having a melting point of 70° C. to 90° C. of the present invention is a wax that is solid at room temperature (15 to 25° C.). The solid wax referred to here is vegetable oil, animal oil, synthetic oil, semi-synthetic oil, ester oil, hydrocarbon, mineral oil, ether, silicone oil, etc., and is not particularly limited as long as it has a melting point of 70° C. to 90° C. Specifically, (B) includes carnauba wax (80-86), candelilla wax (68-72), rice bran wax (70-83), sugar cane wax (77-80), palm wax (85-86), montan wax (65-105), ozokerite (61-90), ceresin (61-95), paraffin wax (50-70), sunflower seed wax (75-82), hydrogenated jojoba oil (66-70), microcrystalline wax (72-101), polyethylene wax (melting point 70-90°C), etc. The parentheses indicate the melting point (°C) of the wax. Preferably, one or more selected from sunflower seed wax, carnauba wax, candelilla wax, and rice bran wax are selected. More preferably, sunflower seed wax is used. Regarding components with a range of melting points, when used in the present invention, raw materials that satisfy the condition of a melting point of 70° C. to 90° C. are used.

[0018] The content of (B) in the present invention is 5 to 20 mass%, preferably 8 to 17 mass%, and more preferably 10 to 15 mass%. If the content of (B) is small, it will melt at high temperatures and the product value will be lost, and if the content of (B) is large, it will be too hard when used and difficult to pick up with fingers.

[0019] The isostearic acid (C) of the present invention is contained as a liquid oil that is compatible with oils and waxes and has excellent temperature stability. The content of (C) is 10 to 65% by mass, preferably 15 to 55% by mass, and more preferably 20 to 45% by mass. If the content of (C) is low, the formulation becomes too hard at low temperatures and difficult to take with fingers, and the formulation itself melts at high temperatures. If the content of (C) is high, the formulation cannot be maintained in a solid state.

[0020] The oil-based solid cosmetic preparation of the present invention may contain ingredients other than the ingredients (A) to (C) to the extent that the effects are not impaired. The ingredients that may be added are not particularly limited as long as they are ingredients that are normally used in cosmetics, and examples thereof include at least one selected from surfactants, oil-based ingredients other than the ingredients (A) to (C), moisturizers, thickeners, chelating agents, medicinal ingredients, protein derivatives, hydrolyzed proteins, amino acids, stabilizers, antioxidants, plant extracts, herbal extracts, vitamins, preservatives, dyes, pigments, powders, ultraviolet absorbers, fragrances, etc.

[0021] Specific examples of the oily solid cosmetic of the present invention include basic cosmetics, hair cosmetics, body cosmetics, makeup cosmetics such as stick-type foundations, and sunscreens. It is particularly preferred to use it in hair cosmetics. The cosmetic of the present invention can be produced according to a conventional method.

[0022] The hair cosmetic composition of the present invention is preferably a hair styling product such as hair wax, hair balm, pomade, or tic, a toiletry product such as a shampoo bar or treatment bar, or a primary hair dye such as a gray hair dye. EXAMPLES

[0023] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples in any way.

[0024] Examples 1 to 6 and Comparative Examples 1 to 11 were prepared by heating and dissolving the components with stirring in the blending ratios shown in Tables 1 and 2. The resulting mixtures were dispensed into sample bottles and allowed to cool to prepare samples for evaluation in Test 1 and Test 2.

[0025] The stirrer used was a Tokyo Rikakikai Co., Ltd. stirrer, Magella ZZ-1100.

[0026] Test 1: Temperature stability test Various tests 1: Samples for evaluation were used and stored in thermostatic chambers at 50℃ (high temperature) and 5℃ (low temperature) for one week. At 50℃ (high temperature), the presence or absence of oil separation in the formulation was visually checked, and at 5℃ (low temperature), the hardness of the formulation was checked with a finger. The evaluation results are indicated by the following symbols. (Evaluation method: Temperature stability check) [Evaluation] 50℃ (high temperature) [Judgment] No oil separation at all:◎ No oil separation, but the surface is shiny (within acceptable limits): ○ There is some oil separation: △ Too much oil separation: × [Evaluation] 5℃ (low temperature) [Judgment] No problem with picking it up with your fingers: ◎ A little hard to pick up with your fingers, but no problem (within acceptable limits): ○ A little hard to pick up with your fingers: △ Hard to pick up with fingers: ×

[0027] Test 2: Usability test Using the evaluation samples for various tests 2, the sensory test was conducted to evaluate "ease of taking with fingers" and "ease of spreading with the palm of the hand" during use. The specific evaluation criteria and the judgment results are shown with the following symbols. (Evaluation method: Ease of removal with fingers) Ten panelists used the evaluation samples for various tests 2 and conducted a sensory test on "ease of picking up with fingers." Each panelist rated the samples on a five-point scale of 5 points (very good), 4 points (good), 3 points (neither good nor bad), 2 points (bad), and 1 point (very bad), and then calculated the average score of all panelists. The results were then judged according to the following criteria. [Evaluation] [Judgment] Average score 4.0 points or more:◎ Average score: 3.0 or more and less than 4.0: ○ Average score: 2.0 or more and less than 3.0: △ Average score: 1.0 or more and less than 2.0: × (Evaluation method: Ease of spreading on the palm of the hand) Ten panelists used the evaluation samples for various tests 2 and conducted a sensory test on "ease of spreading on the palm of the hand." Each panelist rated the samples on a five-point scale of 5 points (very good), 4 points (good), 3 points (neither good nor bad), 2 points (bad), and 1 point (very bad), and then calculated the average score of all panelists, and judged the results according to the following criteria. [Evaluation] [Judgment] Average score 4.0 points or more:◎ Average score: 3.0 or more and less than 4.0: ○ Average score: 2.0 or more and less than 3.0: △ Average score: 1.0 or more and less than 2.0: ×

[0028] [Table 1] *1: Mango seed oil (Croda Japan, Cropure Mango Butter-SO-(JP): melting point 26-36℃) *2: Shea butter (AAK, Lipex Shea: melting point 34℃) *3: Sunflower seed wax (TOWAX-6F2, manufactured by Toa Kasei Co., Ltd.: melting point 72-80℃) *4: Isostearic acid (manufactured by High Alcohol Co., Ltd., Isostearic Acid EX)

[0029] Comparison of Examples 1 to 6 with Comparative Examples 1 to 3 showed that both temperature stability and usability were achieved only when the content of (A) was 30 to 70% by mass and the content of (B) was 5 to 20% by mass. Comparison of Examples 1 to 6 with Comparative Examples 4 to 8 showed that, instead of (A) and (B), the composition was adjusted and evaluated using wax (melting point 50 to 55°C), beeswax (melting point 62 to 65°C), coconut oil (melting point 24.6°C), and jojoba oil (melting point 11 to 12°C), which have different melting points, but it was not possible to achieve both temperature stability and usability.

[0030] [Table 2]

[0031] Comparing Example 6 with Comparative Examples 9 to 11, various liquid oils were used in place of (C) isostearic acid, and the results of evaluation showed that, except for isostearic acid, none of the liquid oils achieved both temperature stability and usability.

[0032] From the above evaluation results, it was found that the oil-based solid cosmetic preparation of the present invention combines temperature stability under high and low temperature conditions and good usability by combining isostearic acid with a component having a specified blend amount and a specified melting point.

[0033] Examples 7 to 9 of oil-based solid cosmetic preparations are shown in Tables 3 to 5 below.

[0034] The oil-based solid cosmetic preparations obtained in the following Examples 7 to 9 had both temperature stability under high and low temperature conditions and good usability.

[0035] Example 7: Hair wax [Table 3]

[0036] Example 8: Cleansing agent [Table 4]

[0037] Example 9: Stick-type foundation [Table 5] [Industrial Applicability]

[0038] The present invention provides an oil-based solid cosmetic composition that is both temperature stable under high and low temperature conditions and has good usability, and is therefore industrially useful.

Claims

1. (A) Oil with a melting point of 26°C to 40°C (B) Wax with a melting point of 70°C to 90°C (C) Isostearic acid and wherein the content of (A) is 30 to 70% by mass, the content of (B) is 5 to 20% by mass, and the content of (C) is 10 to 65% by mass.

2. 2. The oil-based solid cosmetic preparation according to claim 1, wherein (B) is one or more components selected from the following: Carnauba wax, candelilla wax, rice bran wax, sugar cane wax, palm wax, montan wax, ozokerite, ceresin, paraffin wax, sunflower seed wax, hydrogenated jojoba oil, microcrystalline wax, polyethylene wax

3. 2. The oil-based solid cosmetic preparation according to claim 1, wherein (A) is one or more components selected from the following: Cacao butter, palm oil, palm kernel oil, coconut oil, horse fat, shea butter, lanolin (wool fat), petrolatum, mango seed butter, ethyl stearate, myristyl myristate, cetyl ricinoleate, dimer dilinoleyl bis (behenyl / isostearyl / phytosteryl) dimer dilinoleate, dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), (acrylates / stearyl acrylate / dimethicone methacrylate) copolymer

4. 2. The oil-based solid cosmetic preparation according to claim 1, wherein (A) and (B) are one or more components selected from the following: (A) Mango seed butter, shea butter, lanolin (wool fat), petrolatum, dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (B) Sunflower seed wax, carnauba wax, candelilla wax, rice bran wax

5. (A) is one or two selected from mango seed oil and shea butter (B) Sunflower seed wax The oily solid cosmetic preparation according to claim 1,

6. The oily solid cosmetic composition according to any one of claims 1 to 5, which is a hair styling product.

Images