Water-based cosmetics

Abstract

To provide an aqueous cosmetic which comprises a vesicle containing a phospholipid, a thickening agent, a surfactant and an oily component, enables blending of the oily components and has excellent stability without aggregation or precipitation, a moisture-retaining feeling and a viscosity less likely to drip down.SOLUTION: There is provided an aqueous cosmetic which comprises the following components (A) to (D): (A) a phospholipid, (B) one or more selected from carboxymethyl dextran, a carboxy vinyl polymer and a salt thereof, (C) Polyglyceryl-10 Isostearate and (D) an oily component.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an aqueous cosmetic preparation containing a phospholipid, a thickener, a surfactant, and an oily component. [Background technology]

[0002] A technique for solubilizing oily components in the membrane of a vesicle is known (Patent Document 1). However, there is a problem in that only trace amounts of low-polarity components can be incorporated. Liquid crystal compositions and emulsion compositions using phospholipids are known (Patent Document 2), and although it is possible to incorporate oily ingredients, there is a problem in that they do not provide the same fresh feeling when used as aqueous cosmetics. Therefore, there is a need for a solubilizer that can be used in combination with vesicles in aqueous cosmetics. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-154598 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-229040 Summary of the Invention [Problem to be solved by the invention]

[0004] It is known that incorporating a vesicle composition (so-called liposomes) containing phospholipids into aqueous cosmetics improves moisturizing durability and penetration. Meanwhile, thickeners are often used in aqueous cosmetics to improve usability and texture. Surfactants are also often used as solubilizers for adding water-insoluble ingredients, such as fragrances and oily functional ingredients. However, combining vesicles, thickeners, and surfactants can lead to aggregation and precipitation of phospholipids, significantly impairing formulation stability. Therefore, while incorporating vesicles into aqueous cosmetics offers significant benefits in terms of improving functionality, it also poses the problem of placing numerous restrictions on formulation design. The object of the present invention is to provide an aqueous cosmetic preparation which contains phospholipid-containing vesicles, a thickener, a surfactant, and an oily component, which can be blended with the oily component, is free from aggregation or precipitation, has excellent stability, provides a moisturizing feel, and has a viscosity that does not easily drip. [Means for solving the problem]

[0005] The main configuration of the present invention is as follows. 1. An aqueous cosmetic preparation characterized by containing the following components (A) to (D): (A) Phospholipids (B) one or more selected from carboxymethyldextran, carboxyvinyl polymer, and salts thereof (C) Polyglyceryl-10 Isostearate (D) Oily component 2. The aqueous cosmetic preparation according to 1., which contains carboxymethyldextran sodium as component (B). 3. An aqueous cosmetic preparation according to 1. or 2., having a viscosity of 30 mPa·s or more as measured with a B-type viscometer. [Effects of the Invention]

[0006] It was possible to provide an aqueous cosmetic that can be blended with oily ingredients, has an excellent moisturizing feel, has viscosity that prevents dripping, and is excellent in stability without aggregation or precipitation. [Brief explanation of the drawings]

[0007] [Figure 1] Reference sample used in appearance evaluation in the examples. DETAILED DESCRIPTION OF THE INVENTION

[0008] The aqueous cosmetic preparation of the present invention contains component (A): a phospholipid, component (B): one or more selected from carboxymethyl dextran, carboxyvinyl polymer, and salts thereof, component (C): polyglyceryl-10 isostearate, and component (D): an oily component.

[0009] Component (A) Examples of phospholipids (component A) used in the present invention include natural phospholipids such as egg yolk lecithin and soybean lecithin, phospholipids such as hydrogenated egg yolk lecithin and hydrogenated soybean lecithin in which the unsaturated carbon chains in lecithin are converted to saturated bonds by hydrogenation, and phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidic acid, phosphatidylinositol, phosphatidylglycerol, etc., purified or synthesized from natural lecithin. These phospholipids can be used alone or in combination. Commercially available phospholipids can be used. Examples of commercially available phospholipids include "Recinol S-10M" and "Recinol S-10E" manufactured by Nikko Chemicals Co., Ltd., "Basis LP-60HR" and "Basis LP-20" manufactured by Nisshin Oillio Co., Ltd., "COATSOME NC-61" manufactured by Nippon Oil & Fats Corporation, "Egg Yolk Lecithin PL100P" and "Egg Yolk Lecithin PL-30" manufactured by Kewpie Corporation, and "Phospholipon 85G" and "LIPOID P100" manufactured by H. Holstein GmbH & Co. KG. Phospholipids are preferably formulated as vesicles containing phospholipids in order to enhance moisturizing durability and penetration. Phospholipid-containing vesicles can be prepared using a high-pressure emulsifier. Phospholipids and auxiliary agents such as polyhydric alcohols and sterols are dispersed in purified water using a homomixer, and then subjected to high-pressure treatment using a high-pressure emulsifier to prepare the vesicles. The blend amount of component (A) is preferably from 0.01 to 1% by mass, and particularly preferably from 0.05 to 0.5% by mass.

[0010] (B) Component The aqueous cosmetic preparation of the present invention contains, as component (B), one or more selected from carboxymethyl dextran, carboxyvinyl polymer, and salts thereof. Component (B) is a thickener necessary to impart viscosity to the aqueous cosmetic preparation of the present invention so that it does not drip easily. Carboxymethyl dextran Na is particularly preferred as component (B). Commercially available carboxymethyl dextran or a salt thereof can be used, for example, "CMD" (carboxymethyl dextran sodium) manufactured by Meito Sangyo Co., Ltd. Commercially available carboxyvinyl polymers (labeled as carbomer in cosmetics) can be used, for example, "Carbopol 980" manufactured by Lubrizol Corporation, and "Hiviswako 105" and "Hiviswako 103" manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. The blend amount of component (B) is preferably from 0.001% to 1% by mass, and particularly preferably from 0.01% to 0.5% by mass. The mass percentage of the (B) component relative to the (A) component ((B / A)×100) is preferably 1 mass% or more and 1000 mass% or less, more preferably 10 mass% or more and 300 mass% or less, and particularly preferably 20 mass% or more and 250 mass% or less.

[0011] (C) Component The aqueous cosmetic preparation of the present invention contains polyglyceryl-10 isostearate as component (C). Component (C) is a surfactant. Commercially available polyglyceryl-10 isostearate products can be added, including "S Face 10G-IS" and "IS1001-P" manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., and "NIKKOL Decaglyn 1-ISV" manufactured by Nikko Chemicals Co., Ltd. By adding component (C), it is possible to add oily components while maintaining the stability of the aqueous cosmetic preparation of the present invention. The blend amount of component (C) is preferably from 0.01% to 5% by mass, and particularly preferably from 0.05% to 1% by mass. The mass percentage of the component (C) relative to the component (A) ((C / A) x 100) is preferably 10 mass % or more and 300 mass % or less, and particularly preferably 20 mass % or more and 280 mass % or less.

[0012] (D) Component The aqueous cosmetic preparation of the present invention contains an oily component as component (D). Examples of oily components include fragrances and oily functional components. Examples of oily functional components include oils (with emollient effects), oil-soluble vitamins, flavonoids, sphingolipids, essential oils, and ultraviolet absorbers. The blend amount of component (D) is preferably from 0.0005 to 0.5% by mass, and particularly preferably from 0.002 to 0.1% by mass. The mass percentage of the component (D) relative to the component (C) ((D / C)×100) is preferably 50 mass % or less, and particularly preferably 40 mass % or less.

[0013] The aqueous cosmetic preparation of the present invention has a viscosity that prevents dripping. The viscosity of the aqueous cosmetic preparation of the present invention is preferably 30 mPa·s or more, and more preferably 40 mPa·s or more, as measured with a Brookfield viscometer.

[0014] The aqueous cosmetic preparation of the present invention may contain other ingredients besides (A) to (D), such as moisturizing ingredients such as polyhydric alcohols, sugars, and sugar alcohols, thickeners other than (B), surfactants other than (C), and water-soluble functional ingredients, within the range that does not impair the effects of the present invention. [Example]

[0015] The aqueous cosmetics of Examples 1 to 15 and Comparative Examples 1 to 23 were produced by stirring and mixing the components according to the compositions shown in Tables 1 to 3. The phospholipid (A) used was previously prepared into vesicles by high-pressure treatment in a high-pressure emulsifier. Vesicle formation was confirmed using a transmission electron microscope. The names of (A) are as follows, and the numbers in the names indicate mass %. Liposome 1: Water 48,000, Glycerin 40,000, BG 10,000, Hydrogenated Lecithin 1,714, Phytosterols 0,286 Liposome 2: Water 68.5945, DPG 20.0000, Glycerin 10.0000, Hydrogenated Lecithin 1.0000, PEG-30 Phytosterol 0.3000, Phytosterols 0.0300, BG 0.0300, Sodium Citrate 0.0250, Poly(methoxy PEG-9 methacrylate) 0.0200, Citric Acid 0.0005 Liposome 3: Glycerin 40,000, Water 37,878, DPG 20,000, Lecithin 2,000, Phytosterols 0.100, Sodium Citrate 0.020, Citric Acid 0.002

[0016] The obtained aqueous cosmetic compositions were evaluated for viscosity, transmittance, appearance, drip resistance, non-stickiness, moisturizing feeling, and storage stability by the following methods.

[0017] <Viscosity> Measurement was carried out using a Brookfield viscometer at about 25° C. with rotors No. 1 to 3 at a rotation speed of 30 rpm for 30 seconds. For Comparative Example 23, the viscosity was too low to be measured. <Transmittance> The transmittance was measured using a spectrophotometer with an optical path length of 1 cm and a wavelength of 660 nm. Purified water was used as a blank. For measuring the initial value, a sample in a state where air bubbles had been removed 1 to 3 days after preparation was used.

[0018] <Appearance> The degree of turbidity in appearance was evaluated according to the following criteria. When evaluating, standard samples of appearance were prepared and the one that most closely matched the criteria was selected. A photograph of the appearance of the standard sample is shown in Figure 1. 1: Transparent 2: Slightly cloudy 3: Slightly cloudy 4: Quite cloudy 5: Very cloudy

[0019] <Drip-resistant> 0.6 mL of the sample was placed on the palm of the hand and applied to the entire face, and the resistance to dripping was evaluated according to the following criteria. Three expert panelists were asked to judge whether the product dripped easily or not. 〇: All three judged it to be "less likely to drip." △: 1-2 people judged it to be "less likely to drip" ×: All three judged it to be "easy to drip."

[0020] <Non-sticky> 0.6 mL of the sample was placed on the palm of the hand, and the sample was applied to the entire face, and the lack of stickiness was evaluated according to the following criteria. Three expert panelists were asked to judge the texture as either "not sticky" or "slippery." 〇: All three judged it to be "not sticky" △: 1-2 people judged it to be "not sticky" ×: All three judged it to be "slimy"

[0021] <Good moisturizing feeling> 0.6 mL of the sample was placed on the palm of the hand and applied to the entire face, after which the moisturizing feeling was evaluated according to the following criteria. Three expert panelists judged the moisturizing effect as either "good" or "bad." 〇: All three judged it to be "good moisturizing" △: 1-2 people judged it to be "good moisturizing" ×: All three judged it to be "poor moisturizing"

[0022] <Storage stability> The samples were stored at 5°C, room temperature, and 50°C for one month, and then transmittance measurements and appearance evaluations were performed. The change in turbidity from the initial value after storage and the uniformity after storage were evaluated according to the following criteria. Change in appearance turbidity from the initial value ○: The change in evaluation value compared to the initial state was less than 2 in all cases. ×: Any of the evaluation values ​​changed by 2 or more compared to the initial state Uniform appearance 〇: The whole is uniform ×: Aggregation or precipitation occurred, resulting in non-uniformity

[0023] [Table 1]

[0024] [Table 2]

[0025] [Table 3]

[0026] The aqueous cosmetic compositions obtained in the Examples of the present invention were highly stable, with no aggregation, precipitation, or separation observed, despite containing phospholipids, thickeners, surfactants, and oily components. They also had a viscosity that prevented dripping and provided an excellent feel when used. In contrast, most of the aqueous cosmetic compositions obtained in the Comparative Examples were poor in stability, and changes in appearance were observed after storage. Furthermore, the aqueous cosmetic compositions obtained in the Comparative Examples that were highly stable tended to drip or had a poor feel when used.

Claims

1. Contains the following components (A) to (D): An aqueous cosmetic preparation characterized in that (A) forms a vesicle. (A) Phospholipids (B) one or more selected from carboxymethyldextran, carboxyvinyl polymer, and salts thereof (C) Polyglyceryl-10 Isostearate (D) Oily component: 0.0005% by mass or more and 0.5% by mass or less

2. Contains the following components (A) to (D): An aqueous cosmetic preparation characterized in that (A) forms a vesicle. (A) Phospholipids (B) Carboxymethyldextran or a salt thereof (C) Polyglyceryl-10 Isostearate (D) Oily component

3. 3. The aqueous cosmetic preparation according to claim 1, which has a viscosity of 30 mPa·s or more as measured with a Brookfield viscometer.

Images