Cosmetics

Abstract

To provide a cleansing agent having enhanced effectiveness in removing makeup stains (washing effect) in a system containing a large amount, which is 51 mass% more, of water based on the total amount of the cosmetic and further to provide an aqueous cleansing agent which also has a foaming action.SOLUTION: There is provided a cosmetic which comprises (A1) a surfactant containing Polyglyceryl-20 Hexacaprylate, PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin and 51 to 85 mass% of water based on the total amount of the cosmetic.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a cosmetic having excellent cleaning effect.

Background Art

[0002] Cosmetics are formulated with many substances having various properties such as various bioactive components and oily components. A surfactant is formulated as a necessary component for stably maintaining these components having various properties. Surfactants gather at interfaces such as water and oil, water and air, water and powder, etc., to make them more familiar, and exhibit effects such as emulsification, foaming, adsorption, wetting, dispersion, etc. There is a skin cleanser as a cosmetic aimed at removing sebum dirt and makeup cosmetics on the skin. Skin cleansers are roughly classified into a solvent type and a surfactant type. In particular, a skin cleanser mainly aimed at removing makeup cosmetics is called a cleansing agent. The solvent-type cleansing agent mainly composed of oil is easy to get along with makeup dirt and has a high cleaning effect of removing makeup dirt, but has a problem that it is difficult to wash away and does not feel refreshing. The surfactant-type cleansing agent formulated with a surfactant and removing makeup dirt by the action of the surfactant has a washing effect of removing makeup dirt inferior to that of the solvent type, but the ease of washing away and the refreshing feeling of use have been recently preferred. For example, Patent Document 1 (Japanese Patent No. 6433165) discloses an aqueous transparent cleansing cosmetic composition containing a polyglycerin medium-chain fatty acid ester in which 3.5 to 12 moles of a medium-chain fatty acid having 6 to 12 carbon atoms are ester-bonded to 1 mole of polyglycerin having an average degree of polymerization of 12 to 100 and containing 0 to 5% by weight of an oily component.

[0003] The present inventor has been continuously conducting research and development on cleansing agents, and has disclosed a technology of a solvent-type cleansing agent having a high water content and enhanced effect of removing makeup dirt (Patent Document 2; Japanese Patent No. 6726344, Patent Document 3; Japanese Patent No. 6792738). These technologies have enabled the provision of cleansing products that can handle various types of makeup stains. However, there is a demand for even more powerful cleansing products, particularly surfactant-based cleansers that provide a more refreshing clean feeling. Patent Document 4 (JP 2020-100581) describes a cleansing product containing (A) polyoxypropylene polyglyceryl ether having an average number of added moles of propylene oxide of 1 to 18 and a degree of polymerization of glycerin of 1 to 3, and a nonionic surfactant having a specific HLB of 8 or more, as a cleansing cosmetic product that has excellent cleansing effect, is non-irritating to the skin, non-greasy, and has a pleasant feel. However, its cleansing power is not sufficient.

[0004] Furthermore, there is a consumer need for cleansing products that can be used in a foaming form. In response to this, various companies have proposed technologies for foaming water-based cleansing products (Patent Document 5; Patent No. 4911752; Patent Document 6; Japanese Patent Application Publication No. 2021-155387). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 6433165 [Patent Document 2] Patent No. 6726344 [Patent Document 3] Patent No. 6792738 [Patent Document 4] Japanese Patent Publication No. 2020-100581 [Patent Document 5] Patent No. 4911752 [Patent Document 6] Japanese Patent Publication No. 2021-155387 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The present invention aims to provide a cleansing agent that enhances the effect of removing makeup (cleansing effect) in a system containing a large amount of water, 51% by mass or more, relative to the total amount of the cosmetic. Furthermore, it aims to provide an aqueous cleansing agent that also possesses a foaming effect. [Means for solving the problem]

[0007] The present invention has found that in a system containing 51 to 85% by mass of water relative to the total amount of the cosmetic, the cosmetic composition contains a surfactant containing (A1) polyglyceryl-20 hexacaprylate and PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, thereby significantly enhancing the effect of removing makeup (cleansing effect). To create a foaming cosmetic product, by including (A2) anionic surfactants and / or (A3) amphoteric surfactants along with (A1) polyglyceryl-20 hexacaprylate and PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin as mentioned above, it is possible to provide a cosmetic product that not only foams but also has significantly superior makeup-removing (cleansing) properties. The main components of this invention are as follows: (1)(A1) A surfactant containing polyglyceryl-20 hexacaprylate, PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, Cosmetics containing 51-85% by mass of water relative to the total amount of cosmetics. (2) The cosmetic composition according to (1), wherein the surfactant contains (A1), (A2), and / or (A3). (A1); Polyglyceryl-20 hexacaprylate (A2); Anionic surfactant (A3); Amphoteric surfactant (3) Cosmetics described in (1) or (2) which are cleansing agents [Effects of the Invention]

[0008] By combining the surfactant (A1) containing polyglyceryl-20 hexacaprylate, which is part of the present invention, with PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, we were able to provide a cosmetic composition that significantly enhances the effect of removing makeup (cleansing effect) in a system containing 51% by mass or more of water. Furthermore, by adding (A2) anionic surfactant and / or (A3) amphoteric surfactant to the above-mentioned composition of the present invention, we were able to provide a cosmetic composition that also possesses a foaming effect. By adopting the composition of the present invention, we were able to provide an optimal aqueous cleansing agent. [Modes for carrying out the invention]

[0009] The ingredients used in the cosmetic composition of this invention are described below. <Surfactants> The cosmetic composition of the present invention essentially contains (A1) polyglyceryl-20 hexacaprylate as a surfactant. In a system containing 51 to 85% by mass of water relative to the total amount of the cosmetic composition, the cleansing power is significantly improved by combining the surfactant (A1) with PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin. In the cosmetic composition of the present invention, it is preferable that the surfactant (A1) polyglyceryl-20 hexacaprylate is contained in an amount of 4 to 22% by mass, more preferably 5 to 20% by mass, relative to the total amount of the cosmetic composition. Cosmetics with this combination may produce little or no foam during use, but this characteristic can be utilized for commercialization. By combining surfactant (A1), PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin with 51-85% by mass of water, it is possible to provide cosmetics that do not require foaming action, such as non-foaming aqueous cleansing agents or cleansing sheets impregnated with nonwoven fabric or tissue.

[0010] On the other hand, by adding foaming agents such as anionic surfactants and amphoteric surfactants to the above-mentioned composition of the present invention (surfactant A1 + polyol with an IOB value of 0.5 to 2.3 + water 51 to 85% by mass), a foaming cosmetic can also be made. Any foaming agent that produces foam when incorporated into a cosmetic can be included, but anionic surfactants and amphoteric surfactants are preferred. By including (A2) anionic surfactant and / or (A3) amphoteric surfactant in a surfactant containing (A1) polyglyceryl-20 hexacaprylate, a cosmetic with excellent makeup removal effect (cleansing effect) that also possesses foaming properties can be made. (A2); anionic surfactant, (A3); amphoteric surfactant are included in the cosmetic of the present invention for the purpose of foaming, so any of them that have a foaming effect and can be incorporated into a cosmetic can be used. The following are examples of specific ingredients. (A2); Examples of anionic surfactants include fatty acid soaps (potassium soaps) such as potassium laurate, potassium myristate, and potassium coconut oil fatty acid, potassium lauryl sulfate, alkyl sulfate triethanolamine ether, sodium cocoyl glutamate, sodium cocoyl glycinate, sodium lauroyl sarcosinate, sodium lauroyl methyl β-alanine, potassium cocoyl glutamate, sodium cocoyl alanine, potassium cocoyl glycinate, coconut fatty acid arginine, and sodium lauroyl aspartate. (A3); Examples of amphoteric surfactants include lauramidopropylamine oxide, lauramidopropyl hydroxysultaine, sodium cocoamphoacetate, and cocamidopropyl betaine. In the cosmetic of the present invention, it is preferable to contain surfactant (A1) at 4 to 22% by mass, more preferably 5 to 20% by mass based on the total amount of the cosmetic, as described above. However, for surfactant (A2) and / or surfactant (A3), the specific components and their contents may be appropriately set according to the desired foam quality and foam amount. In the present invention, when the blending mass ratio (A2 + A3) / (A1) of each surfactant is less than 3, it is preferable because both foaming and washing effect are well balanced. In the cosmetic of the present invention, surfactants not corresponding to A1, A2, and A3 (for example, nonionic surfactants and cationic surfactants, etc.) can be arbitrarily blended. In that case, it is preferable that (A2 + A3 + arbitrary surfactant) / (A1) is less than 3. In the cosmetic of the present invention, it is preferable to contain surfactant (A2) at 0 to 15% by mass based on the total amount of the cosmetic. Also, in the cosmetic of the present invention, it is preferable to contain surfactant (A3) at 0 to 15% by mass based on the total amount of the cosmetic.

[0011] <PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin> The cosmetic of the present invention contains PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin. When the present invention is made into a foaming cosmetic that particularly emphasizes foam quality, it is preferable to use PPG-9 Diglycerin. In the cosmetic of the present invention, it is preferable to contain PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin at 1 to 18% by mass, more preferably 2 to 15% by mass per total amount of the cosmetic. It is preferable to contain surfactant A1 Polyglyceryl-20 Hexacaprylate and PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin in a mass ratio range of 2:1 to 2:3.

[0012] <Water> The cosmetic of the present invention contains water at 51 to 85% by mass based on the total amount of the cosmetic. When the cosmetic of the present invention is used as a cleansing product, it has a fresh and refreshing feeling during use and can be washed off smoothly.

[0013] <Optional Component> Furthermore, the cosmetic composition of the present invention may contain various raw materials commonly used in cosmetics, to the extent that they do not impair the effects of the present invention. For example, polyhydric alcohols such as butylene glycol (BG), dipropylene glycol (DPG), and pentylene glycol may be added to impart antibacterial properties, as well as preservatives, pH adjusters such as citric acid and dipotassium phosphate, neutralizing agents, antioxidants, fragrances, colorants (e.g., cyanocobalamin, (chlorophyllin / copper) complex), and beauty ingredients (e.g., rosemary extract). In addition, oils can be optionally added. Examples of oils include: natural animal and vegetable oils and semi-synthetic oils, hydrocarbon oils, ester oils, glyceride oils, silicone oils, fat-soluble vitamins, higher fatty acids, and essential oil components from animals, plants, and synthetic sources. Examples of natural animal and vegetable oils and semi-synthetic oils include avocado oil, linseed oil, almond oil, olive oil (olive fruit oil), wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, soybean oil, evening primrose oil, corn oil, rapeseed oil, horse fat, palm oil, palm kernel oil, castor oil, sunflower oil, jojoba oil, macadamia nut oil, coconut oil, hydrogenated coconut oil, peanut oil, meadowfoam oil, lanolin, etc. Examples of hydrocarbon oils include squalane, squalene, liquid paraffin, and petrolatum. Ester oils include diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, isostearyl isostearate, trimethylolpropane triisostearate, cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate. Examples include 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, cetyl lactate, tetradecyl lactate, isopropyl myristate, octyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, phytosteryl oleate, diisostearyl malate, paramethoxycinnamate, pentaerythritol tetralosinate, caprylyl caprylate, caprylic / capric acid, coconut alkyl, dicaprylyl ether, BG diisononanoate, and diethylhexyl succinate.Examples of glyceride oils include glyceryl triisostearate, glyceryl triisopalmitate, glyceryl tri-2-ethylhexanoate, glyceryl tritetradecanoate, and glyceryl monoisooctyl diparamethoxycinnamate. Examples of silicone oils include dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclopentasiloxane, decamethylcyclohexasiloxane, diphenylsiloxyphenyl trimethicone, stearoxysilicone, and other higher alkoxy-modified silicones, alkyl-modified silicones, and higher fatty acid ester-modified silicones. Examples of fat-soluble vitamins include tocopherol, and examples of essential oils include orange peel oil and rosemary leaf oil. Among these examples, cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, caprylyl caprylate, coconut alkyl, dicaprylyl ether, BG diisononanoate, diethylhexyl succinate, mineral oil, avocado oil, meadowfoam oil, olive fruit oil, tocopherol, orange peel oil, and rosemary leaf oil are preferred, with cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, caprylyl caprylate, coconut alkyl, dicaprylyl ether, BG diisononanoate, diethylhexyl succinate, and mineral oil being particularly preferred. Oils may be blended individually, or two or more may be included in combination. The cosmetic composition of the present invention may contain oil in an amount of 0 to 5% by mass, more preferably 0 to 3% by mass, based on the total amount of the cosmetic composition.

[0014] The cosmetic composition of the present invention is designed in various dosage forms, taking into consideration usability and feel. Specifically, it is in liquid or gel form. [Examples]

[0015] The present invention will be described in detail below with reference to examples and comparative examples. Cosmetics with the compositions shown in Tables 1 and 2 were prepared by conventional methods, and their cleansing power was evaluated by conducting the following tests. 1. Test of cleaning power The cleansing power of the cosmetic product of the present invention was tested using a waterproof pencil eyeliner, which is one of the waterproof makeup products, and the cleansing rate (%) was calculated and evaluated. <Method for evaluating cleaning power> (1) 0.0006g of waterproof eyeliner (Maybelline Eye Studio Slim Eyeliner 01 Black) was applied to a 1cm diameter circle on a 3cm x 3cm piece of white artificial leather and allowed to dry for 30 minutes. This was used as the test sample. (2) The color values ​​(Lab1) of the prepared test samples were measured using a colorimeter (device name: CM-2600d, manufactured by Konica Minolta, Inc.). (3) 0.1 ml of the test sample of the example or comparative example was dropped onto the test specimen prepared in (1) above, and rubbed with a finger 30 times at a rate of once per second. (4) The test samples were thoroughly rinsed with water and dried. (5) The color values ​​(Lab2) of the test specimens after drying were measured using a colorimeter. (6) The cleaning rate was calculated using the following formula. Cleaning rate (%)=100×[(L1-L2) 2 +(a1-a2) 2 +(b1-b2) 2 ] 1 / 2 / [(L1-L0) 2 +(a1-a0) 2 +(b1-b0) 2 ] 1 / 2 However, Lab0 is the color value of white artificial leather before applying waterproof eyeliner. Since experience has shown that a cleaning rate of 70% or higher is judged to be good in sensory evaluation, we used a "cleaning rate of 70%" as the benchmark for judging the quality of makeup removal in this test as well. The results of the cleaning power test are shown in the lower section of Tables 1 and 2.

[0016] [Table 1]

[0017] [Table 2]

[0018] 〔result〕 The cosmetic compositions of Examples 1 to 22, which adopted the configuration of the present invention, achieved a cleansing rate of 70% or higher (74.53 to 91.91%), and were all judged to have high cleansing power. On the other hand, Comparative Example 1, which contains polyglyceryl-20 hexacaprylate (A1) of the present invention but does not contain PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, and Comparative Examples 2 to 11, which do not contain polyglyceryl-20 hexacaprylate (A1) of the present invention, all had cleansing rates that did not reach the target of 70% (1.24 to 40.06%), and were all judged to have low cleansing power.

[0019] In this invention, the "cleaning rate" was 70% or higher in all cases, and it was determined that high cleansing power was achieved in a system containing 51% by mass of water. When the design quality of the cosmetic composition of this invention does not prioritize "foaming" during use, it was confirmed that the composition of this invention [at least (a cosmetic composition consisting of A1 polyglyceryl-20 hexacaprylate + PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin + 51-85% by mass of water)] can be preferably provided as a non-foaming aqueous cleansing composition or as a wipe-off type cleansing sheet impregnated with the cosmetic composition of this invention on nonwoven fabric or tissue.

[0020] On the other hand, if the cosmetic composition of the present invention is to be foamed when used, that is, if "foaming" is an important design quality characteristic of the cosmetic composition, then "foam volume and foam quality" become important quality items. Below, the foaming properties of the cosmetic compositions shown in Tables 1 and 2 were tested. To determine the quality of the foam during use, we conducted a sensory evaluation of both the "amount of foam" and the "quality of foam." 2. Foaming test <Method for evaluating foam volume and foam quality> A skilled sensory evaluator placed 3g of the test product onto their palm, added 12g of water, and then rubbed their hands together 20 times to create a lather. The amount and quality of the resulting foam were then evaluated visually and sensorily according to the following criteria. <Bubble amount> ◎; Very large amount of foam ○; large amount of foam △; The amount of foam is average (not at a level that can be called a lot). ×; Low amount of foam <Foam quality> ◎; Fine bubbles ○; The bubbles are relatively fine. △; The foam is ordinary (not particularly fine-textured). ×; It is a coarse foam. <Overall assessment of foaming ability> ○; If the evaluations for each of (foam volume and foam quality) were [(◎·◎), (◎·○), (◎·△), (○·◎), (○·○), (○·△), (△·◎), (△·○), (△·△)], it was judged to have "good foaming". △; If the evaluations for (foam volume and foam quality) are [(◎·×) or (○·×)], it means that although the foam is not particularly fine, it is judged to have "almost good foaming ability". If the evaluation for each of (foam volume and foam quality) was [(×·×), (×·△), (×·○), (×·◎), (△·×)], it was judged as "poor foaming". Tables 3 and 4 show the evaluation results of the foaming test and the overall judgment for the cosmetic products in the examples and comparative examples. A "-" in the table indicates that no sensory evaluation was performed.

[0021] [Table 3]

[0022] [Table 4]

[0023] 〔result〕 The cosmetics of Examples 1 to 22 received the results of "good foaming" or "almost good foaming" in the overall evaluation of foaming. The basic composition of the present invention (surfactant A1 polyglyceryl-20 hexacaprylate + PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin + water 51-85% by mass) is combined with surfactant (A2) and / or surfactant (A3) to form a composition (A1 polyglyceryl-20 hexacaprylate + A2 + PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin + water 51-85% by mass), (A1 polyglyceryl-20 hexacaprylate + A It was confirmed that by using (A1 Polyglyceryl-20 Hexacaprylate + A2 + A3 + PPG-14 Polyglyceryl-2 Ether and / or PPG-9 Diglycerin + Water 51-85% by mass), a foaming cosmetic and foaming aqueous cleansing agent with significantly superior makeup removal effect (cleansing effect) can be preferably provided, along with a foaming action.

[0024] As shown in the examples, comparative examples, and formulation examples above, by using a system containing 51 to 85% by mass of water relative to the total amount of the cosmetic, and a cosmetic containing a surfactant containing (A1) polyglyceryl-20 hexacaprylate and PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, we were able to provide a cosmetic with excellent makeup removal effect (cleansing effect). Furthermore, when designing a cosmetic product to have a foaming quality, by including (A1) polyglyceryl-20 hexacaprylate, PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, along with (A2) anionic surfactant and / or (A3) amphoteric surfactant, it was possible to provide a cosmetic product that also possesses a foaming effect and excellent makeup removal effect (cleansing effect).

Claims

1. (A1) A cleansing product containing a surfactant containing polyglyceryl-20 hexacaprylate, PPG-14 polyglyceryl-2 ether and / or PPG-9 diglycerin, and 51 to 85% by mass of water relative to the total amount of the cosmetic product.

2. The cleansing composition according to claim 1, wherein the surfactant contains (A1), (A2), and / or (A3). (A1); Polyglyceryl-20 hexacaprylate (A2); Anionic surfactant (A3); Amphoteric surfactant

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