Water-based cleansing cosmetics

Abstract

To provide aqueous cleansing cosmetics that easily agree with makeup, can remove the makeup well, and cause no friction on the skin after wiping off.SOLUTION: Aqueous cleansing cosmetics comprise polyglycerol fatty acid ester with an HLB of 12.5-16, polyglycerol fatty acid ester with an HLB of 10-12, alkanediol having 5 or less carbon atoms, and divalent alcohol having ether linkage.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an aqueous cleansing cosmetic preparation. [Background technology]

[0002] In the field of cosmetics, cleansing cosmetics for removing makeup are available in various formulations such as oils, lotions, and creams, each of which is used according to its intended use.

[0003] Cleansing creams and cleansing oils, which have an oily continuous phase, blend well with makeup and have excellent cleansing properties, but cleansing creams can leave an oily feeling, requiring the user to wash the face, while cleansing oils can remove too much oil, causing irritation to the skin.

[0004] On the other hand, lotion-type products that do not contain oil or contain only a small amount of oil are in demand because they have a less oily feel, are excellent in the feel of use, and are less irritating to the skin. Lotion-type cleansers contain nonionic surfactants as the main ingredient for safety reasons, but in order to achieve a high makeup removal effect, it was necessary to contain a large amount of polyoxyethylene surfactants (see, for example, Patent Document 1). In addition, when reducing the amount of surfactant, it was necessary to contain a large amount of polyoxyethylene compounds (see, for example, Patent Document 2). However, cleansing cosmetics that contain a large amount of polyoxyethylene surfactants or polyoxyethylene compounds have the problem of causing skin creaking after wiping. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-003218 A [Patent Document 2] JP 2017-178868 A Summary of the Invention [Problem to be solved by the invention]

[0006] The problem to be solved by the present invention is to provide an aqueous cleansing cosmetic which is easily compatible with makeup, has an excellent makeup removing effect, and does not leave a squeaky feeling on the skin after wiping. [Means for solving the problem]

[0007] As a result of intensive research into solving the above-mentioned problems, the present inventors have found that an aqueous cleansing cosmetic composition comprising a polyglycerol fatty acid ester having an HLB of 12.5 to 16, a polyglycerol fatty acid ester having an HLB of 10 to 12, an alkanediol having 5 or more carbon atoms, and a dihydric alcohol having an ether bond has excellent cleansing performance and can solve the above-mentioned problems, thereby completing the present invention. Effect of the Invention

[0008] That is, the present invention makes it possible to develop an aqueous cleansing cosmetic composition that has excellent cleansing power and does not leave a squeaky feeling after use by incorporating a specific polyglycerol fatty acid ester in combination with a specific alkanediol and a polyhydric alcohol into the aqueous cleansing cosmetic composition. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail. Note that the notation "to" indicating a range includes the upper and lower limits.

[0010] The present invention comprises (A) a polyglycerol fatty acid ester having an HLB value of 12.5-16, and (B) a polyglycerol fatty acid ester having an HLB value of 10-12.

[0011] The method for producing polyglycerol, which is the raw material for polyglycerol fatty acid esters, is not particularly limited, but examples thereof include a conventional method for producing polyglycerol, in which glycerol is heated in the presence of an alkali catalyst under normal or reduced pressure.

[0012] The average degree of polymerization of polyglycerol is preferably 2-20, and more preferably 6-10.

[0013] The average degree of polymerization of polyglycerol is calculated from the hydroxyl value by the following formula (i): The hydroxyl value in formula (i) is measured in accordance with the "Standard Methods for the Analysis of Fats, Oils and Related Compounds, 2013 Edition" (established by the Japan Oil Chemists' Society). Average degree of polymerization = (112220 - 18 x hydroxyl value) / (74 x hydroxyl value - 56110) (i)

[0014] The HLB of components (A) and (B) is calculated by the following formula (ii). HLB value = 20 × (1-S / A) (ii) [S: saponification value of ester, A: acid value of fatty acid]

[0015] The polyglycerol fatty acid ester of component (A) used in the present invention has an HLB of 12.5 to 16. The constituent fatty acid is not particularly limited, but a saturated or unsaturated fatty acid having 8 to 24 carbon atoms is usually used. The fatty acid may be a mixture, and a saturated or unsaturated fatty acid having 12 to 18 carbon atoms is preferred. Specific examples include polyglyceryl-6 laurate, polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 stearate, polyglyceryl-10 isostearate, and polyglyceryl-10 oleate. Among these, polyglyceryl-10 laurate, polyglyceryl-10 isostearate, and polyglyceryl-10 oleate are preferred.

[0016] The content of component (A) in the aqueous cleansing cosmetic is preferably from 1% to 20% by mass, more preferably from 3% to 15% by mass. When the content of component (A) is from 1% to 20% by mass, the cosmetic blends more easily with makeup.

[0017] The polyglycerol fatty acid ester of component (B) used in the present invention has an HLB of 10 to 12. The constituent fatty acid is not particularly limited, but a saturated or unsaturated fatty acid having 8 to 24 carbon atoms is usually used. The fatty acid may be a mixture, and a saturated or unsaturated fatty acid having 12 to 18 carbon atoms is preferred. Specific examples include polyglyceryl-4 laurate, polyglyceryl-6 stearate, polyglyceryl-10 distearate, polyglyceryl-10 tristearate, polyglyceryl-6 isostearate, polyglyceryl-10 diisostearate, and polyglyceryl-6 oleate. Among these, polyglyceryl-6 isostearate is preferred.

[0018] The content of component (B) in the aqueous cleansing cosmetic is preferably 0.5% by mass or more and 5% by mass or less, and more preferably 1% by mass or more and 3% by mass or less. When the content of component (B) is 0.5% by mass or more and 5% by mass or less, the makeup removal is more excellent.

[0019] The aqueous cleansing cosmetic composition of the present invention contains, from the viewpoint of further enhancing the cleansing power, component (C) an alkanediol having 5 or more carbon atoms and component (D) a dihydric alcohol having an ether bond.

[0020] Component (C) preferably has 5 to 8 carbon atoms, and examples thereof include pentylene glycol, hexylene glycol, caprylyl glycol, etc. Of these, pentylene glycol is preferred.

[0021] The content of component (C) in the aqueous cleansing cosmetic is preferably 3% by mass or more and 10% by mass or less. When the content of component (C) is 3% by mass or more and 10% by mass or less, the cosmetic blends more easily with makeup.

[0022] Examples of component (D) include dipropylene glycol, ethylhexylglycerin, etc. Among these, dipropylene glycol is preferred.

[0023] The content of component (D) in the aqueous cleansing cosmetic is preferably from 1% to 10% by mass. When the content of component (D) is from 1% to 10% by mass, the makeup removal is more excellent.

[0024] The cleansing cosmetic of the present invention can contain, as appropriate, ingredients used in ordinary cleansing cosmetics, provided that the effects of the invention are not impaired, such as oils such as squalane, liquid paraffin, isopropyl myristate, isononyl isononanoate, cetyl octanoate, glyceryl triethylhexanoate, jojoba oil, and olive oil, water-soluble polymers such as hydroxyethyl cellulose and carboxyvinyl polymer, various vitamins, amino acids, herbal medicines, anti-inflammatory agents, cell activators, pigments, preservatives, and fragrances.

[0025] The aqueous cleansing cosmetic composition of the present invention preferably contains no oil or has an oil content of 15% or less.

[0026] The aqueous cleansing cosmetic composition of the present invention can be applied in any formulation form, such as liquid, gel, or sheet form in which a nonwoven fabric or the like is impregnated with these, or aerosol spray or aerosol foam in combination with a propellant, depending on the intended use, method, environment of use, etc. The container form is also the same, and it can be applied to various containers without any particular limitation, such as bottles, bottles with dispensers, pump foamers, jars, tubes, sprays, aerosol cans, bags filled with sheets, boxes, etc.

[0027] The method for preparing the aqueous cleansing cosmetic composition of the present invention is not particularly limited. The present invention will be described in more detail below with reference to examples and comparative examples, but the scope of the present invention is not limited to these examples. EXAMPLES

[0028] Examples 1 to 19 and Comparative Examples 1 to 9 The components shown in Tables 1 and 2 were dissolved at 70°C in the composition shown in the table, and then cooled to room temperature to produce an aqueous cleansing cosmetic. Using the aqueous cleansing cosmetic obtained, a sensory test was carried out for usability. Evaluation items were "makeup compatibility," "makeup removal," and "absence of squeaking after wiping," and were rated on a four-point scale.

[0029] [Makeup blends in well] A sensory evaluation was conducted by 20 healthy female panelists. The lipstick was applied to the forearm, left for 10 minutes, and then a water-based cleansing cosmetic was applied to the same area. The compatibility of the cleansing cosmetic and the lipstick was evaluated using a maximum of 5 points, with the average score calculated and the evaluation was conducted according to the following criteria. The results are shown in Tables 1 and 2. (standard) ◎: 4.0 points or more (good for makeup) ○: 3.0 points or more, less than 4.0 points (blends well with makeup) △: 2.0 points or more, less than 3.0 points (slightly poor makeup compatibility) ×: 2.0 points or less (makeup does not blend well)

[0030] [Makeup removal] A sensory evaluation was conducted by 20 healthy female panelists. Lipstick was applied to the forearm and left for 10 minutes, after which an aqueous cleansing cosmetic was applied to the same area, allowed to blend, and then blotted with cotton. The absence of makeup residue on the area blotted with cotton was averaged out of a maximum of 5 points and evaluated according to the following criteria. The results are shown in Tables 1 and 2. (standard) ◎: 4.0 points or more (very good makeup removal) ○: 3.0 points or more, less than 4.0 points (good makeup removal) △: 2.0 points or more, less than 3.0 points (slight makeup remains) ×: 2.0 points or less (makeup remains)

[0031] [No squeaking after wiping] A sensory evaluation was conducted by 20 healthy female panelists. Lipstick was applied to the forearm and left for 10 minutes, after which an aqueous cleansing cosmetic was applied to the same area, allowed to blend, and then blotted with cotton. The absence of squeaking sensation on the skin after the cleansing cosmetic was removed was evaluated using a maximum of 5 points, with the average score calculated according to the following criteria. The results are shown in Tables 1 and 2. (standard) ◎: 4.0 points or more (no creaking, very good usability) ○: 3.0 points or more, less than 4.0 points (little creaking, good usability) △: 2.0 points or more, less than 3.0 points (slightly creaky, slightly poor usability) ×: 2.0 points or less (creaking, poor usability)

[0032] [Table 1]

[0033] [Table 2]

[0034] *1: S Face 10G-L (manufactured by Sakamoto Pharmaceutical Co., Ltd.) *2: S-Face IS-1001P (manufactured by Sakamoto Pharmaceutical Co., Ltd.) *3: SY Glyster MO-7S (manufactured by Sakamoto Pharmaceutical Co., Ltd.) *4: S-Face IS-601P (manufactured by Sakamoto Pharmaceutical Co., Ltd.)

[0035] Examples 1 to 19, which used a polyglycerol fatty acid ester with an HLB of 12.5 to 16, a polyglycerol fatty acid ester with an HLB of 10 to 12, an alkanediol having 5 or more carbon atoms, and a dihydric alcohol having an ether bond, were superior in terms of makeup blending, makeup removal, and absence of squeaky feeling after wiping, compared to Comparative Example 1, which used only component (A), Comparative Examples 2 to 5, which did not contain any of the components, Comparative Example 6, which used an alkanediol having 4 or less carbon atoms, Comparative Example 7, which used diglycerin, which is a tetrahydric alcohol, and Comparative Examples 8 and 9, which did not use a polyglycerol fatty acid ester in components (A) and (B).

Claims

[Claim 1] (A) a polyglycerol fatty acid ester having an HLB of 12.5 to 16; (B) a polyglycerol fatty acid ester having an HLB of 10 to 12; (C) an alkanediol having 5 or more carbon atoms, (D) a dihydric alcohol having an ether bond, (E) Water An aqueous cleansing cosmetic comprising:

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