Mousse-type emulsified cleansing cosmetic

Abstract

To provide mousse-like emulsifiable cleansing cosmetics that are initially in a mousse form, and through the course of use, enables a user to feel change of state, first from a mousse state to a creamy state and subsequently to an oily state.SOLUTION: Mousse-like emulsifiable cleansing cosmetics is provided. Preferably, the cosmetics undergo a phase transition from a mousse form, first to a creamy state and subsequently to an oily state. More preferably, the cosmetics contains the following (A), still more preferably the following (B) and (C). (A) Sodium polyacrylate starch. (B) Hydrocarbon oil that is liquid at 25°C. (C) Nonionic surfactant.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a mousse - type emulsified cleansing cosmetic that is in a mousse state at the start of use and can be felt to change its state from a mousse state to a cream state and further to an oil state during use.

Background Art

[0002] Cleansing cosmetics have been developed in various dosage forms for the purpose of removing sebum dirt and makeup cosmetics on the skin. There are various types of cleansing products such as milk type, cream type, gel type, in which oily components are emulsified by surfactants, lotion type with little or no oily components, oil type with liquid oil as the main component, balm type, etc. It is considered that consumers select their favorite products based on the characteristic functions and usage feelings of each dosage form.

[0003] The O / W emulsified cream type with a large amount of oily components is characterized in that it changes its state from a cream state to an oil state during use, and a phase inversion feeling can be obtained. After applying the preparation to the skin, there is a fresh feeling only when spreading it, and when spreading is continued, the emulsion droplets break, and the oily components spread on the skin, changing the load of the massage. This feeling can give the user a sense of relaxation.

[0004] For example, in Patent Document 1, a cleansing cream with an easily distinguishable phase inversion is proposed by combining a surfactant, an oil - phase component of 30% by mass or more, an aqueous - phase component, and a specific polymer. Thus, the state change of the preparation during the cleansing action can give various positive effects to the user in terms of emotion and can become an added value of the preparation.

[0005] However, there has been no emulsified cleansing cosmetic in the form of a mousse with a fluffy feeling and gentle skin contact.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-169438 [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to provide a mousse-type emulsified cleansing cosmetic that is mousse-like at the start of use and changes in state from mousse-like to cream-like, and then to oil-like during use. [Means for solving the problem]

[0008] In order to achieve the above objectives, we conducted intensive research and found that the above problems could be solved by incorporating sodium acrylate graft starch into an emulsified cleansing cosmetic, thus completing the present invention.

[0009] In other words, the present invention is 1. It is mousse-like. Furthermore, during use, it changes from a mousse-like consistency to a cream-like consistency, and then to an oil-like consistency. A mousse-type emulsified cleansing cosmetic characterized by the following: And, It contains the following (A), (B), and (C): The content of component (A) is 0.2 to 2.0% by mass, A mousse-type emulsified cleansing cosmetic having an ingredient content of 20 to 70% by mass of component (B) . (A) Sodium acrylate graft starch (B) Liquid hydrocarbon oil at 25°C (C) Nonionic surfactant 2. The content of component (C) is 2.0% by mass or more. It is a mousse-type emulsified cleansing cosmetic. 3. The aforementioned component (C) contains two or more polyoxyethylene sorbitan fatty acid esters. It is a mousse-type emulsified cleansing cosmetic. 4. The mixing ratio ((A) / (B)) of component (A) to component (B) is 0.2 or more and 4.0 or less. It is a mousse-type emulsified cleansing cosmetic. 。 [Effects of the Invention]

[0010] The mousse-type emulsified cleansing cosmetic of the present invention allows users to experience a change in state during use, from mousse-like to cream-like, and then to oil-like. Furthermore, the mousse-type emulsified cleansing cosmetic of the present invention has good rinsability and good stability over time at high temperatures. [Modes for carrying out the invention]

[0011] In this invention, "mousse-like" means having a matte texture and a fluffy appearance, as well as a fluffy, airy feel when used. Furthermore, unlike mousse formulations used in hair preparations, the sodium acrylate graft starch absorbs water in the formulation and swells during the preparation stage, resulting in a mousse-like appearance and feel. Therefore, it does not require containers such as aerosol cans (cans that dispense with gas) or pump foamers (mesh containers like those for foaming soap), and can be filled into jar-type containers in its mousse-like state and dispensed into the hand in its mousse-like state.

[0012] A creamy texture refers to a semi-solid, oil-based emulsion with a glossy appearance. In terms of feel, it means a refreshing sensation when spread. The clear transition from mousse to creamy texture is achieved by applying physical pressure to the soft, elastic formulation and spreading it, which changes the texture from matte to glossy and transitions to a refreshing feel.

[0013] Next, the change in state from creamy to oily refers to a phase inversion. This occurs when sebum and makeup on the skin mix with the oil in the formulation, and when the water in the formulation evaporates, changing from an oil-based (O / W) emulsion to a water-based (W / O) emulsion with a lighter, oily feel, resulting in a lighter texture and better glide.

[0014] Good rinsing properties mean that the skin does not feel sticky during or after washing, leaving a refreshing feeling.

[0015] Good long-term stability at high temperatures means that no oil floating, separation, or significant decrease in viscosity is observed over time under high-temperature conditions of 40°C or higher, and the preparation is uniform.

[0016] Hereinafter, the configuration of the present invention will be described in detail.

[0017] <Component (A)> The component (A) used in the present invention is sodium acrylate grafted starch. This component is the sodium salt of a product obtained by graft-polymerizing acrylic acid onto starch, and is known to be used as an adsorbent, binder, emulsion stabilizer, and hydrophilic thickener in cosmetics. In the present invention, it has been found that by blending (A), the dosage form of the emulsified cleansing cosmetic can be made into a mousse form. Furthermore, the long-term stability of the preparation at high temperatures can be enhanced.

[0018] Specific examples of the sodium acrylate grafted starch used as the component (A) include Suranjuru ST-100MC, Suranjuru ST-100SP, Suranjuru 1000 (above, Sanyo Chemical Industries, Ltd.), MAKIMOUSSE7, MAKIMOUSSE12, MAKIMOUSSE25, MAKIMOUSSE400 (above, Daito Kasei Co., Ltd.), etc. Commercially available products such as these can be used.

[0019] The content of the component (A) in the present invention is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, based on the total mass. If it is 0.2% by mass or more, a mousse-like appearance and feel can be imparted. Also, the long-term stability at high temperatures is good, and furthermore, when the emulsified cleansing cosmetic is applied to the skin, there is no dripping of the cosmetic, and the usability is good.

[0020] On the other hand, more preferably, it is preferably 2.0% by mass or less, more preferably 1.2% by mass or less, based on the total mass. If it is 2.0% by mass or less, the time required for the change from mousse-like to cream-like and from cream-like to oil-like is shortened, and the state change is easier to recognize. Furthermore, the rinsability is good, and no deterioration in usability such as stretching or stickiness of the preparation is observed.

[0021] (A) If the amount of component is between 0.2% and 2.0% by mass of the total mass, the change in state from mousse-like to cream-like to oil-like will be easily noticeable, and the change in texture will be fully enjoyable.

[0022] <(B) component> The component (B) used in this invention is a hydrocarbon oil that is liquid at 25°C. Component (B) is used as an oily base in cleansing products, and it has the effect of blending with makeup dirt and lifting the dirt from the skin. A higher content of component (B) tends to result in a faster transfer speed during massage and better makeup removal.

[0023] (B)Specific examples of components include mineral oil, α-olefin oligomer, liquid paraffin, liquid isoparaffin, squalane, polybutene, hydrogenated polybutene, volatile isoparaffin, etc. These liquid hydrocarbon oils can be used individually or in combination of two or more.

[0024] In the present invention, the content of component (B) is preferably 10% by mass or more, and more preferably 20% by mass, of the total mass. If it is 10% by mass or more, the rate of phase inversion from creamy to oily during massage is good.

[0025] On the other hand, more preferably, the amount is 80% by mass or less of the total mass, and more preferably 70% by mass or less. If it is 70% by mass or less, the stability over time at high temperatures and makeup removal will be good. This is because the emulsion droplets can be kept stable in the formulation, resulting in good stability over time. In addition, the oily makeup cosmetics and the formulation will blend well, and no makeup cosmetics or the formulation will remain on the skin after rinsing, resulting in good makeup removal and a good skin feel after washing.

[0026] The mixing ratio of component (A) to component (B) (=(A) / (B)) is preferably 0.2% by mass or more and 5.0% by mass or less. If it is 0.2% by mass or more, the formulation will have a good mousse-like texture and the change from mousse-like to cream-like state will be easily noticeable. If it is 5.0% by mass or less, the formulation will have a good mousse-like texture and the change from cream-like to oil-like state will be easily noticeable.

[0027] <(C) component> The component (C) used in this invention is a nonionic surfactant. Component (C) is generally used as an emulsifier. While any nonionic surfactant will not affect the state changes between mousse, cream, and oil, using two or more polyoxyethylene sorbitan fatty acid esters as nonionic surfactants improves the long-term stability of the formulation and maintains good rinsability.

[0028] (C)Specific examples of component (C) include polyoxyethylene sorbitan monooleate (20 E.O.), polyoxyethylene sorbitan monostearate (20 E.O.), polyoxyethylene sorbitan tristearate (20 E.O.), and polyoxyethylene sorbitan monolaurate (20 E.O.). It is preferable to use any two or more of these polyoxyethylene sorbitan fatty acid esters in combination.

[0029] Examples of commercially available products include Leodor TW-O120V, Leodor TW-S120V, Leodor TW-S320V, Leodor TW-L120 (all manufactured by Kao Corporation), and Sorbon T-20 (both manufactured by Toho Chemical Industry Co., Ltd.).

[0030] The amount of component (C) in the mousse-type emulsified cleansing cosmetic of the present invention is not particularly limited, but is preferably 2% by mass or more. If the amount is 2% by mass or more, there is no sticky feeling when rinsing, the skin feels refreshed after washing, and the stability of the formulation is also good.

[0031] <Water> In the mousse-type emulsified cleansing cosmetic of the present invention, water is used to constitute the aqueous phase and maintain the system. The water content in the present invention is preferably 5 to 60% by mass, and more preferably 10 to 50% by mass, from the viewpoint of improving storage stability and obtaining a refreshing feeling after use.

[0032] The mousse-type emulsified cleansing cosmetic of the present invention may, in addition to the above-mentioned components, use any commonly used components as necessary, provided that they do not impair the effects of the present invention. Examples of such components include anionic surfactants, cationic surfactants, nonionic surfactants, oils, UV absorbers, preservatives, humectants, polymers, amino acid derivatives, sugar derivatives, fragrances, water, alcohol, thickeners, colorants, metal ion chelating agents, antioxidants, pharmaceuticals, and fragrances. [Examples]

[0033] Next, the present invention will be described in detail based on examples, but is not limited thereto. Prior to the examples, the test methods and evaluation methods used in each example will be described.

[0034] <Evaluation test of the mousse-like texture of the formulation> <Ease of understanding the change in state (from mousse-like to creamy)> <Ease of understanding the change in state (from creamy to oily)> Ten expert panelists applied commercially available powder foundation, mascara, and lipstick to their faces and allowed them to dry for approximately four hours. Next, they took approximately 1.2g of the composition described in the Examples and Comparative Examples, spread it over their entire faces while looking in a mirror, and massaged it in a circular motion with their index, middle, and ring fingers to blend it with the makeup. After that, they rinsed it off with water. The mousse-like texture of the formulation and the clarity of the change from "mousse-like to cream-like" state were evaluated using the following evaluation criteria in absolute terms, and the average score was used for the final determination. Next, the clarity of the change from "cream-like to oil-like" state was evaluated using a relative evaluation with the evaluation criteria for the target product (Naive Cleansing Cream (Z)) set at 3 points, and the average score was used for the final determination.

[0035] (Evaluation criteria) Mousse-like texture of the formulation 5 points: I really appreciate the matte finish and the fluffy, airy feel. 4 points: It has a matte appearance and a fluffy, airy feel. 3 points: It has a matte appearance and a slightly fluffy, airy feel. Points 2: It doesn't really have a matte finish or a fluffy, airy feel; it's glossy and has a somewhat creamy texture. 1 point: It has no matte appearance or airy, fluffy feel at all; it's glossy and... It has a cream-like feel. The average score across all panels was rated as follows: ◎ for 4 points or higher, ○ for 3 points or higher, △ for 2 points or higher, and × for less than 2 points.

[0036] (Evaluation criteria) Clarity of the change in state (from mousse-like to cream-like) 5 points: Very easy to understand 4 points: Easy to understand 3 points: Somewhat easy to understand 2 points: Difficult to understand 1 point: Very difficult to understand The average score across all panels was rated as follows: ◎ for 4 points or higher, ○ for 3 points or higher, △ for 2 points or higher, and × for less than 2 points.

[0037] (Evaluation criteria) Clarity of the change in state (from creamy to oily) 5 points: Very easy to understand 4 points: Easy to understand 3 points: Somewhat easy to understand 2 points: Difficult to understand 1 point: Very difficult to understand The average score across all panels was rated as follows: ◎ for 4 points or higher, ○ for 3 points or higher, △ for 2 points or higher, and × for less than 2 points.

[0038] <Age-dependent stability evaluation test> The samples were placed in 50 mL transparent glass containers, sealed, and stored in a 45°C constant temperature bath for 3 months. They were then evaluated visually according to the following criteria.

[0039] (Evaluation Criteria) 5 points: No change in the appearance of the sample was observed. 4 points: Very slight oil separation and viscosity reduction are observed on the sample surface. 3 points: Clear oil separation, partial separation, and a significant decrease in viscosity were observed on the sample surface. 2 points: Separation is observed throughout the sample. 1 point: Separation is observed immediately after preparation.

[0040] Examples 1-18, Comparative Examples 1-6 Emulsified cleansing cosmetics with the formulations shown in Tables 1 and 2 were prepared according to conventional methods, and the above tests were conducted. The results are shown in Tables 1 and 2.

[0041] [Table 1]

[0042] [Table 2]

[0043] As is clear from Tables 1 and 2, the emulsified cleansing cosmetics in the examples using the components of the present invention all exhibited excellent performance. On the other hand, in the comparative examples, the ease of understanding the change in state (Moo The formulations were inferior in one or more aspects, such as the transition from a mushy to a creamy state, the clarity of the state change (from creamy to oily), the mousse-like texture of the formulation, or its stability over time, and therefore failed to achieve the objective of the present invention. In addition, comparative examples 5 and 6 were not emulsified and separated as a result of the formulation, making evaluation impossible.

Claims

1. A mousse-type emulsifying cleansing cosmetic characterized by being in a mousse-like state and changing from a mousse-like state to a cream-like state and then to an oil-like state during use, It contains the following (A), (B), and (C): The content of component (A) is 0.2 to 2.0% by mass, A mousse-type emulsified cleansing cosmetic having an amount of component (B) of 20 to 70% by mass. (A) Sodium acrylate graft starch (B) Liquid hydrocarbon oil at 25°C (C) Nonionic surfactant

2. The mousse-type emulsified cleansing cosmetic according to Claim 1, wherein the content of component (C) is 2.0% by mass or more.

3. The mousse-type emulsified cleansing cosmetic according to claim 1 or 2, wherein the (C) component contains two or more polyoxyethylene sorbitan fatty acid esters.

4. The mousse-type emulsified cleansing cosmetic composition according to claim 1 or 2, wherein the mixing ratio ((A) / (B)) of component (A) to component (B) is 0.2 or more and 4.0 or less.

Images