Aqueous cosmetic

Abstract

To provide an aqueous cosmetic that simultaneously achieves, at a high level, the three qualities of smoothness, skin compatibility, and non-stickiness, and further delivers excellent moisturizing sensation.SOLUTION: An aqueous cosmetic comprises the following components (A) to (D): (A) a polysaccharide having a glucose content of 50% or more, (B) a zwitterionic polymer containing a phosphorylcholine group, (C) Polyglyceryl-10 Eicosanedioate / Tetradecanedioate, and (D) water.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to aqueous cosmetics.

Background Art

[0002] In cosmetics, it is required to impart smoothness to the skin after application. "Smoothness" refers to the feeling of being uniform and smooth when touching the skin after applying the cosmetics. "Smooth skin" is one of the keyword images of beautiful skin, and the development of cosmetics that impart smoothness to the skin is demanded by many people. For example, Patent Document 1 proposes a skin external preparation containing 1) one or more selected from high-viscosity or solid silicone and 2) an acrylic acid / alkyl methacrylate (C10-30) copolymer, which has an effect of imparting moisturizing property and also has a morphological improvement effect on the skin such as an effect of imparting smoothness. The skin external preparation described in Patent Document 1 forms a film with 1) silicone and 2) an acrylic polymer, and imparts smoothness with this film. Although skin compatibility is not described, it is difficult to say that this combination of polymer components is excellent in skin compatibility, and it is difficult to achieve smoothness, skin compatibility, and non-stickiness at a high level. Also, although it is described that it imparts moisturizing property, the moisturizing feeling was not sufficient. Note that "skin compatibility" refers to the feeling that the applied cosmetics disappear quickly from the skin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide an aqueous cosmetic that achieves high levels of smoothness, skin affinity, and non-stickiness, and further has excellent moisturizing properties.

Means for Solving the Problems

[0005] The means for solving the problems of the present invention are as follows. 1. An aqueous cosmetic characterized by containing the following components (A) to (D). (A) Polysaccharide having a glucose ratio of 50% or more (B) Amphoteric polymer containing a phosphorylcholine group (C) (Eicosanedioic acid / Tetradecanedioic acid) polyglyceryl-10 (D) Water 2. The aqueous cosmetic according to 1, wherein the content of (A) is 0.005% by mass or more and 1.0% by mass or less based on the total amount of the cosmetic.

Effects of the Invention

[0006] According to the present invention, an aqueous cosmetic can be obtained that achieves high levels of smoothness, skin affinity, and non-stickiness, and further has excellent moisturizing properties.

Modes for Carrying Out the Invention

[0007] The aqueous cosmetic of the present invention contains the following components (A) to (D). (A) Polysaccharide having a glucose ratio of 50% or more (B) Amphoteric polymer containing a phosphorylcholine group (C) (Eicosanedioic acid / Tetradecanedioic acid) polyglyceryl-10 (D) Water

[0008] (A) Component: Polysaccharide having a glucose ratio of 50% or more The polysaccharide having a glucose ratio of 50% or more means a polysaccharide in which 50% or more of the constituent monosaccharides are glucose. The polysaccharide is a carbohydrate composed of 10 or more monosaccharides bonded together, and % means the ratio of the number of glucose units to the total number of constituent monosaccharides. Examples of polysaccharides with a glucose ratio of 50% or more include sclerothium gum (100%), gellan gum (50%), tamarind gum (50%), succinoglycan (87.5%), corn starch, modified corn starch, starches such as dextrin (100%), etc., and one or more of them can be used.

[0009] From the viewpoints of smoothness and non-stickiness, the content of component (A) in the aqueous cosmetic of the present invention is preferably 0.005% by mass or more and 1.0% by mass or less based on the total amount of the cosmetic. The content of component (A) based on the total amount of the cosmetic is more preferably 0.01% by mass or more, further preferably 0.02% by mass or more, and more preferably 0.5% by mass or less, further preferably 0.4% by mass or less.

[0010] (B) Component: Phosphorylcholine group-containing amphoteric polymer (B) Component has a phosphorylcholine group. The phosphorylcholine group is represented by the following formula (1). The phosphorylcholine group is the polar group part of the phospholipid that constitutes the cell membrane and is an amphoteric polar group.

Chem.

[0011] From the viewpoint of smoothness, the content of component (B) in the aqueous cosmetic of the present invention is preferably 0.001% by mass or more and 0.5% by mass or less based on the total amount of the cosmetic. The content of component (B) based on the total amount of the cosmetic is more preferably 0.005% by mass or more, further preferably 0.01% by mass or more, and more preferably 0.4% by mass or less, further preferably 0.2% by mass or less.

[0012] (C) Component: Polyglyceryl-10 (Eicosanedioic acid / Tetradecanedioic acid) Polyglyceryl-10 (Eicosanedioic acid / Tetradecanedioic acid) is an ester of a mixed fatty acid of eicosanedioic acid and tetradecanedioic acid and polyglycerin, and is a water-soluble oil agent. The (C) component is commercially available from, for example, Nippon Seika Co., Ltd.

[0013] From the viewpoint of skin affinity, it is preferable that the blending amount of the (C) component with respect to the whole cosmetic is 0.1% by mass or more and 3.0% by mass or less. The blending amount of the (C) component with respect to the whole cosmetic is more preferably 0.2% by mass or more, further preferably 0.3% by mass or more, more preferably 2.0% by mass or less, and further preferably 1.5% by mass or less.

[0014] (D) Component: Water As the water that can be used in the aqueous cosmetic of the present invention, water that can be used in cosmetics, external pharmaceuticals, quasi-drugs, etc. can be used, but purified water, distilled water, membrane-filtered water, and ion-exchanged water are preferable. It is also possible to use only one of the above types of water, or a combination of two or more types of water can be used. The aqueous cosmetic of the present invention is an aqueous cosmetic mainly composed of the water of the (D) component and water-soluble components, and includes an oil-in-water type emulsified cosmetic. The blending amount of the (D) component may be set appropriately, but it is 50% by mass or more, more preferably 70% by mass or more, based on the total amount of the cosmetic.

[0015] From the viewpoints of smoothness and non-stickiness, it is preferable that the mass ratio (A / B) of the (A) component to the (B) component is 0.01 or more and 50 or less. The mass ratio (A / B) of the (A) component to the (B) component is more preferably 0.05 or more, further preferably 0.1 or more, more preferably 30 or less, and further preferably 15 or less.

[0016] The aqueous cosmetic of the present invention preferably has a medium viscosity with fluidity in terms of smoothness, skin affinity, and non-greasiness. Specifically, the viscosity measured with a B-type viscometer (25°C, rotor Nos. 1 to 4, 12 rotations, 30 seconds) is preferably 200 mPa·s or more, more preferably 500 mPa·s or more, still more preferably 1000 mPa·s or more, and preferably 20000 mPa·s or less, more preferably 15000 mPa·s or less, and still more preferably 10000 mPa·s or less.

[0017] In addition to the components (A) to (D), the aqueous cosmetic of the present invention can usually contain components commonly used in cosmetics, polyhydric alcohols, saccharides, sugar alcohols, pigments, inorganic powders, organic powders, plant extracts, pH adjusters, salts, thickeners, preservatives, sequestering agents, colorants, fragrances, etc. Further, other medicinal components and physiologically active components can be contained. However, in terms of smoothness, the oil content in the whole cosmetic is preferably 10% by mass or less, more preferably 5.0% by mass or less, still more preferably 3.0% by mass or less, and even more preferably 1.0% by mass or less.

[0018] Examples of the polyhydric alcohols, saccharides, and sugar alcohols include glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-pentanediol, glucose, sorbitol, mannose, mannitol, galactose, galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride, methyl gluceth-10, PPG-10 methyl glucose, glycereth-26, and the like.

[0019] Examples of the pigments, inorganic powders, and organic powders include talc, kaolin, silica, mica, zeolite, bentonite, titanium dioxide, iron oxide, crystalline cellulose, nylon powder, poly(meth)acrylate ester, polymethylsilsesquioxane powder, and the like.

[0020] Examples of the thickener include carbomers and the like. Examples of the preservative include phenoxyethanol, methylparaben, ethylparaben and the like. Examples of the sequestering agent include edetate salts such as disodium ethylenediaminetetraacetate, edetic acid, and sodium edetate. Examples of the active ingredient include vitamin C such as L-ascorbic acid, L-ascorbic acid phosphate ester, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, L-ascorbic acid-2-glucoside; skin lightening agents such as glutathione and extract of Saxifraga stolonifera; skin activators such as royal jelly and extract of Fagus crenata; blood circulation promoters such as capsaicin, gingerol, cantharidin, caffeine, tannic acid, and γ-oryzanol; glycyrrhizic acid derivatives such as dipotassium glycyrrhizate and stearyl glycyrrhizate; anti-inflammatory agents such as azulene; and lysozyme chloride.

[0021] The aqueous cosmetic of the present invention can be used as a lotion, emulsion, essence, body lotion, or the like.

Example

[0022] Using the compositions shown in Tables 1 to 3 (the numerical values of the formulations represent mass %), each component was stirred and mixed to obtain an aqueous cosmetic. The obtained cosmetics were evaluated by the following method. The results are shown in Tables 1 to 3.

[0023] <Evaluation method> By discussion among three professional panelists, sensory evaluation was performed on each item immediately after applying about 0.3 mL of each cosmetic to the inner forearm according to the following scoring method, and the following scores were given. Cosmetics with a score of △ or higher were considered to have passed. ·Smoothness Smoothness refers to the feeling of being uniform and smooth when touching the skin after applying the cosmetic to the skin, which is a feeling contrary to friction or roughness. ◎: Feels very smooth. ○: Feels smooth. △: Slightly feels smooth. ×: Does not feel smooth. · Skin affinity Skin affinity refers to the feeling that when a cosmetic is applied to the skin, it is absorbed and soaked into the skin. After a certain period of time has passed after application, there is no feeling of remaining liquid, which is the opposite of the feeling that the cosmetic is repelled. It is the opposite feeling. ◎: Has very good skin affinity. ○: Has good skin affinity. △: Has somewhat good skin affinity. ×: Has poor skin affinity.

[0024] · Lack of stickiness Stickiness refers to the viscous or sticky feeling of remaining liquid that is felt even after a certain period of time has passed when touching the skin after applying the cosmetic to the skin. Or it is the feeling of remaining liquid with adhesiveness. ◎: Does not feel sticky. ○: Barely feels sticky. △: Slightly feels sticky. ×: Feels sticky. · Moisturizing feeling The moisturizing feeling is the feeling of smoothness that is felt when touching the skin after applying the cosmetic to the skin. It is this. ◎: Feels very moisturized. 〇: Feels moisturized. △: Slightly feels moisturized. ×: Does not feel moisturized.

[0025] · SEM image observation A black artificial leather cut into a 1.5 cm × 1.5 cm square was pasted on the bottom surface of a plastic cup with a diameter of 3.3 cm, and 6.4 g of each aqueous cosmetic was poured onto the artificial leather and left standing in an open system in a 50 °C constant temperature bath for 1 day to form a film. After that, the formed film was observed with an SEM and evaluated according to the following criteria. ◎: The unevenness of the artificial leather cannot be seen at all. 〇: Almost no unevenness of artificial leather can be seen. △: Slight unevenness of artificial leather can be seen. ×: Unevenness of artificial leather can be clearly seen.

[0026]

Table 1

[0027]

Table 2

[0028]

Table 3

[0029] The aqueous cosmetic containing the components (A) to (D) of the present invention can achieve three characteristics: smoothness, skin affinity, and non-stickiness, and furthermore, it has excellent moisturizing feeling. Also, it was confirmed that a smooth film without unevenness was formed in the SEM image. The aqueous cosmetic obtained in the comparative example not containing any of the components (A) to (D) was inferior in at least one of smoothness, skin affinity, and non-stickiness.

[0030] Formulation examples are shown below. Formulation Example 1 Lotion (Blending components) (mass%) Water Remainder BG 5.0 Pentylene glycol 1.5 Glycerin 5.0 Sclerotium gum 0.05 Ethylhexylglycerin 0.1 Betaine 1.0 Raffinose 1.0 Glycyrrhizic acid 2K 0.1 Polyquaternium-51 0.005 (Eicosanedioic acid / Tetradecanedioic acid) Polyglyceryl-10 0.6 Hydrogenated Lecithin 0.01 Chamomile Flower Extract 0.1 Citric Acid 0.02 Sodium Citrate 0.25

[0031] Formulation Example 2: Skin Lotion (Ingredients) (mass%) Water Balance BG 5.0 Pentylene Glycol 2.0 Glycerin 8.0 Diglycerin 2.0 Ethylhexylglycerin 0.1 Glycereth - 26 1.0 Betaine 1.0 Polyquaternium - 51 0.01 (Acrylates / Alkyl Acrylate (C10 - 30)) Crosspolymer 0.1 Dipotassium Glycyrrhizinate 0.1 PEG - 60 Hydrogenated Castor Oil 0.2 Isotridecyl Isononanoate 0.1 Hydrogenated Lecithin 0.05 Sclerotium Gum 0.05 (Eicosanedioic Acid / Tetradecanedioic Acid) Polyglyceryl - 10 0.6 Potassium Hydroxide 0.025

[0032] Formulation Example 3: Emulsion (Ingredients) (mass%) Water Balance BG 5.0 Pentylene Glycol 1.5 Glycerin 6.0 Diglycerin 1.0 Ethylhexylglycerin 0.1 Sclerotium Gum 0.05 Modified Corn Starch 0.1 Trehalose 1.0 Ascorbyl Glucoside 2.0 Dipotassium Glycyrrhizinate 0.1 Isotridecyl Isononanoate 0.5 Triethylhexanoin 1.0 Di(phytosteryl / octyldodecyl) lauroyl glutamate 0.5 Hydrogenated lecithin 0.3 (Acrylates / C10-30 alkyl acrylate) crosspolymer 0.2 Potassium hydroxide 0.04 Polyquaternium-51 0.05 (Eicosanedioic acid / tetradecanedioic acid) polyglyceryl-10 0.6 Betaine 1.0

Claims

1. An aqueous cosmetic characterized by containing the following components (A) to (D). (A) A polysaccharide having a glucose ratio of 50% or more (B) A phosphorylcholine group-containing amphoteric polymer (C) (Eicosanedioic acid / tetradecanedioic acid) polyglyceryl-10 (D) Water

2. The aqueous cosmetic according to Claim 1, characterized in that the content of (A) is 0.005% by mass or more and 1.0% by mass or less based on the total amount of the cosmetic.

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