Skin cosmetic

Abstract

To provide a skin cosmetic exhibiting stringiness during application and delivering a dense, luxurious texture, while avoiding sliminess during application, remaining non-sticky during drying of the skin after application, and leaving the skin smooth, moisturized, and hydrated after application.SOLUTION: A skin cosmetic comprises the following components (A), (B), (C), (D), and (E): (A) xanthan gum, (B) tuberose polysaccharide, (C) 1 to 10 mass% of a divalent alcohol, (D) sugar alcohol, and (E) water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cosmetic. [Background technology]

[0002] Cosmetics containing water-soluble polysaccharides such as xanthan gum have stringiness and provide a moist feel. For example, Patent Document 1 describes that a cosmetic preparation containing an alkyl-modified carboxyvinyl polymer, an ascorbic acid selected from ascorbic acid and ascorbic acid ether, 1,3-propanediol, a water-soluble polysaccharide, and water provides a feeling of rapid penetration after application and further reduces stickiness and squeaky feeling on the skin after application. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-204343 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional skin cosmetics containing water-soluble polysaccharides such as xanthan gum have a tendency to form threads and provide a moist feeling, but they have problems such as being sticky or greasy when applied, and the protective effect on the skin after application of the skin cosmetics is not fully satisfactory. [Means for solving the problem]

[0005] The inventors have discovered that a skin cosmetic composition that combines xanthan gum, tuberose polysaccharide, and specific amounts of dihydric alcohol and sugar alcohol has spinnability when applied, a dense feel, and a luxurious feel, but is not sticky during application, is not sticky when drying after application, and leaves the skin smooth, moist, and hydrated after application.

[0006] The present invention comprises the following components (A), (B), (C), (D) and (E): (A) xanthan gum, (B) tuberose polysaccharide, (C) 1 to 10 mass% of a dihydric alcohol, (D) sugar alcohol, (E)Water The present invention relates to a skin cosmetic composition comprising the above-mentioned compound. Effect of the Invention

[0007] The skin cosmetic of the present invention has a stringy property when applied, has a dense and luxurious feel, but is not sticky during application, is not sticky when drying on the skin after application, leaves the skin smooth, moisturized and hydrated, and has an excellent protective effect on the skin after application. The feeling of skin protection effect refers to the fact that after the skin cosmetic of the present invention is applied to the skin, a film is formed on the skin, and when it is applied to the face, for example, when the facial expression is changed by moving the mouth or the like, the film does not break down but follows the change in facial expression and feels as if it remains as a film. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The xanthan gum of component (A) used in the present invention may be any one used in ordinary cosmetics, and may be a commercial product that has been purified, dried, and powdered. For example, Echo Gum, Echo Gum BT, Echo Gum F, Echo Gum GM, Echo Gum RD, Echo Gum SF, Echo Gum T, Echo Gum TF, Monart Gum GS, Keldent (all manufactured by Sumitomo Dainippon Pharma Co., Ltd.), Xanthan Gum (manufactured by Merck Japan Co., Ltd.), Sun Ace (manufactured by San-Ei Gen F.F.I. Co., Ltd.), Neosoft XK (manufactured by Taiyo Kagaku Co., Ltd.), and Nomcoat ZZ (manufactured by Nisshin Oillio Group Co., Ltd.) may be mentioned, and these may be used.

[0009] One or more types of component (A) may be used, and from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application, the content is preferably 0.01 to 0.5 mass%, more preferably 0.05 to 0.4 mass%, and even more preferably 0.15 to 0.25 mass% of the total composition.

[0010] Component (B), tuberose polysaccharide, contains glucuronic acid, mannose, arabinose, galactose, and xylose as its constituent components and has a molecular weight of 1.0×10 4 ~2×10 7 Its detailed structure is as described in JP-A-64-10997, and its production method includes, for example, a method of culturing callus of Polianthes tuberosa Linne(') as described in Example 1 of JP-A-64-10997. As the tuberose polysaccharide, commercially available products such as SOFCARE TP-S (active ingredient 1% by mass, manufactured by Kao Corporation) can be used.

[0011] One or more types of component (B) may be used, and from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and hydrated feeling of the skin after application, and improving the sense of protective effect of the skin after application, the content is preferably 0.01 to 0.5 mass%, more preferably 0.03 to 0.4 mass%, and even more preferably 0.07 to 0.2 mass% of the total composition.

[0012] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.05 to 30, more preferably 0.1 to 10, even more preferably 0.8 to 3.5, and even more preferably 1.5 to 2.5, from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application.

[0013] The dihydric alcohol of component (C) is a compound having two hydroxyl groups in the molecule, and may be any of those commonly used in cosmetics. Examples of the dihydric alcohol of component (C) include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, butylene glycol, and propanediol. Of these, from the viewpoints of improving spinnability during application, reducing stickiness during application, and improving moist and hydrated feeling on the skin after application, it is preferable to contain one or more selected from propanediol, propylene glycol, dipropylene glycol, and 1,3-butylene glycol, more preferably to contain one or more selected from propanediol, dipropylene glycol, and 1,3-butylene glycol, and even more preferably to contain dipropylene glycol.

[0014] One or more types of component (C) may be used, and from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application, the content is 1 to 20 mass% of the total composition, preferably 2 to 15 mass%, more preferably 5 to 9.5 mass%, and even more preferably 6 to 9 mass%.

[0015] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.005 to 0.5, more preferably 0.01 to 0.1, even more preferably 0.016 to 0.044, and even more preferably 0.023 to 0.031, from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application.

[0016] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.0005 to 0.11, more preferably 0.001 to 0.05, even more preferably 0.008 to 0.031, and even more preferably 0.011 to 0.019, from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application.

[0017] The sugar alcohol of component (D) is obtained by reducing the reducing group (aldehyde group or ketone group) of a sugar having a reducing group to an alcohol group. Examples of sugar alcohols include xylitol, lactitol, paraben, sorbitol, maltitol, mannitol, erythritol, trehalose, and glucosyltrehalose. Of these, from the viewpoint of reducing stickiness when the skin dries after application and improving the sense of protective effect on the skin after application, it is preferable to contain one or more selected from sorbitol, maltitol and trehalose, and it is more preferable to contain trehalose.

[0018] One or more types of component (D) may be used, and from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application, the content is preferably 0.5 to 10 mass%, more preferably 1.4 to 7 mass%, and even more preferably 2 to 4 mass% of the total composition.

[0019] In the present invention, the mass ratio (C) / (D) of component (C) to component (D) is preferably 0.5 to 20, more preferably 1 to 10, even more preferably 1.47 to 5.7, and even more preferably 2.1 to 3, from the viewpoints of improving spinnability during application, reducing stickiness during application, reducing stickiness when the skin dries after application, improving smoothness of the skin after application, improving moisturized and moisturized feeling of the skin after application, and improving the sense of protective effect of the skin after application.

[0020] In the present invention, the content of water as component (E) is preferably 50 to 95 mass% of the total composition, more preferably 60 to 93 mass%, and even more preferably 70 to 90 mass%, from the viewpoints of reducing stickiness during application and improving the feeling of skin protection effect after application.

[0021] The skin cosmetic preparation of the present invention may further contain (F) a trivalent or higher polyol other than component (D), which can improve the spinnability during application and improve the sense of protective effect on the skin after application. The trivalent or higher polyol of component (F) is a compound having three or more hydroxyl groups in the molecule, and may be any of those commonly used in cosmetics. In addition, it is composed only of hydrogen atoms, carbon atoms, and oxygen atoms. Examples of trihydric alcohols include glycerin and trimethylolpropane. Examples of tetrahydric alcohols include diglycerin. Examples of polyhydric alcohols having a valence of five or more include polyglycerins such as triglycerin; and sugars such as glucose, maltose, maltose, sucrose, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside.

[0022] The trivalent or higher polyol preferably contains one or more selected from glycerin, diglycerin, and polyoxyethylene methyl glucoside, and more preferably contains one or more selected from glycerin and polyoxyethylene methyl glucoside, from the viewpoints of reducing stickiness when the skin dries after application and improving the moisturized and moisturized feeling of the skin after application.

[0023] The trivalent or higher polyol of component (F) may be used alone or in combination with two or more kinds, and from the viewpoints of reducing stickiness on the skin when it dries after application, improving smoothness on the skin after application, improving moisturized and hydrated feeling on the skin after application, and improving the sense of protective effect on the skin after application, the content is preferably 1 to 20 mass%, more preferably 4 to 18 mass%, and even more preferably 6 to 18 mass% of the total composition.

[0024] In addition to the above-mentioned components, the skin cosmetic of the present invention may contain components that are usually used in cosmetics, such as surfactants, oily components, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, moisturizers other than components (C), (D), and (F), and cooling agents.

[0025] The skin cosmetic of the present invention can be produced according to a conventional method, for example, by the following method. Components (A) and (C) are added to a portion of component (E), heated and stirred until completely dissolved, and then cooled to room temperature (Solution 1). Components (B) and (D) and the other remaining components are added to the remaining component (E), stirred at room temperature, and then Solution 1 is added and stirred to obtain a skin cosmetic.

[0026] The skin cosmetic of the present invention is suitable as a solubilized or aqueous cosmetic, preferably an aqueous cosmetic, and more preferably an aqueous liquid cosmetic. Furthermore, the skin cosmetic of the present invention is preferably a lotion, a beauty essence, a milky lotion, etc., more preferably a beauty essence or a lotion, and even more preferably a beauty essence. EXAMPLES

[0027] Examples 1 to 9, Comparative Example 1 Skin cosmetics having the compositions shown in Table 1 were manufactured and evaluated for spinnability, non-stickiness during application, non-stickiness when the skin dries after application, smoothness of the skin after application (immediately after application), moist feeling of the skin after application, feeling of protective effect of the skin after application, and smoothness of the skin after application (10 minutes after application). The results are also shown in Table 1. In addition, when (20EO) or (60EO) is stated as an ingredient in the examples and formulation examples, EO refers to ethylene oxide in polyoxyethylene, and the number indicates the number of moles of EO added.

[0028] (Manufacturing method) Components (A) and (C) were added to a portion of component (E), and the mixture was stirred at 80°C until completely dissolved, and then the temperature was returned to 25°C (Solution 1). Components (A) and (D) and the other remaining components were added to the remaining component (E), and the mixture was stirred with a propeller (250 rpm) at 25°C. Solution 1 was then added and stirred to obtain a skin cosmetic preparation.

[0029] (Evaluation method) Three expert panelists applied 0.2g of each skin cosmetic to the back of their cleansed hands, massaging for 20 seconds with the tips of their index and middle fingers in a circular motion of about 4cm in diameter, rotating once per second. Each item was then evaluated according to the following criteria. The results are shown as the total score given by the three panelists.

[0030] (1)Spinnability: Three expert panelists assessed the presence or absence of stringiness when 0.2 g of each skin cosmetic was dropped from a dropper onto the back of the hand, using a 5-point scale. The evaluation was done on a 5-point scale, with 1 being no spinnability and 5 being spinnability. Spinnability is defined as the property of a liquid that stretches into long threads when it is dropped or when a stick is inserted into the liquid and quickly pulled up.

[0031] (2) No stickiness during application: The lack of stickiness during application was evaluated on a 5-point scale, with 5 being no stickiness and 1 being stickiness.

[0032] (3) No stickiness on the skin after application: The lack of stickiness upon drying was evaluated on a 5-point scale, with 5 being no stickiness and 1 being stickiness.

[0033] (4) Smoothness of skin after application (immediately after application): The smoothness of the skin after application was evaluated on a 5-point scale, with 5 being smooth and 1 being no smoothness.

[0034] (5) Moisturizing feeling on skin after application: The moist feeling of the skin after application was evaluated on a 5-point scale, with 5 being moist and 1 being no moist feeling.

[0035] (6) Skin protection effect after application: The feeling of protective effect on the skin after application was evaluated on a 5-point scale, with 5 being a feeling of protective effect and 1 being no feeling of protective effect. The sense of protective effect was evaluated by having the fingers of the hand on which each skin cosmetic was applied made into a fist, then repeatedly spreading and straightening the fingers, and evaluating whether the coating on the back of the hand felt like it was sticking to the skin without breaking down and remaining as a coating.

[0036] (7) Smoothness of skin after application (10 minutes after application): The smoothness of the skin after application was evaluated on a 5-point scale, with 5 being smooth and 1 being no smoothness.

[0037] [Table 1]

[0038] *1 Xanthan gum: Nomcort ZZ (manufactured by Nisshin Oillio Group, Ltd.), *2 Tuberose polysaccharide solution (1% aqueous solution): SOFCARE TP-S (Kao Corporation), *3 Dipropylene glycol: DPG-RF (ADEKA)

[0039] Prescription Examples 1-3 All of the skin cosmetics having the compositions shown in Tables 2 to 4 have a stringy texture when applied, a dense, luxurious feel, but are not sticky during application, are not sticky when drying on the skin after application, leave the skin smooth and moisturized after application, and provide an excellent feeling of protective effect on the skin after application.

[0040] [Table 2]

[0041] [Table 3]

[0042] [Table 4]

Claims

1. The following components (A), (B), (C), (D) and (E): (A) xanthan gum, (B) tuberose polysaccharide, (C) 1 to 10% by mass of a dihydric alcohol, (D) Sugar alcohol (E) Water A skin cosmetic comprising:

2. 2. The skin cosmetic according to claim 1, wherein the mass ratio (A) / (C) of component (A) to component (C) is 0.005 to 0.

5.

3. 3. The skin cosmetic according to claim 1, wherein the mass ratio (B) / (C) of component (B) to component (C) is 0.0005 to 0.

11.

4. 3. The skin cosmetic according to claim 1, wherein the content of component (B) is 0.01 to 0.5% by mass.

5. 3. The skin cosmetic preparation according to claim 1 or 2, wherein the sugar alcohol (D) comprises one or more selected from the group consisting of sorbitol, maltitol and trehalose.

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