Two-part skin-improving cosmetic

Abstract

A two-part skin-improving cosmetic that comprises a first part containing a carboxyvinyl polymer and water and a second part containing sodium silicate and water, wherein the first part and / or the second part contain glycylglycine.

Description

Technical Field

[0001] The present invention relates to a two-component skin-improving cosmetic.

Background Art

[0002] Conventionally, as a cosmetic having an immediate skin-improving effect, for example, a wrinkle-improving effect, a cosmetic containing a polymer capable of forming a film on the skin surface and a component having a shrinking effect is known.

[0003] For example, Patent Document 1 describes a cosmetic composition adapted for topical application to the skin, which contains a predetermined amount of at least one tightening agent and a predetermined amount of at least one elastomeric and water-insoluble film-forming linear block ethylenic polymer in a medium compatible with the skin.

[0004] Further, Patent Document 2 describes a cosmetic composition for enhancing skin elasticity and improving skin wrinkles, which contains a skin-shrinking silicate and a predetermined acrylic polymer.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the cosmetics as described above, there is a demand for cosmetics that not only focus on improving wrinkles but also on other skin problems such as improving pores, etc., and there is room for improvement.

[0007] Therefore, an aspect of the present invention is to provide a cosmetic having a wide range of skin-improving effects. [Means for solving the problem]

[0008] One aspect of the present invention for solving the above problems is a two-component skin-improving cosmetic comprising a first part containing a carboxyvinyl polymer and water, and a second part containing sodium silicate and water, wherein at least one of the first and second parts contains glycylglycine. [Effects of the Invention]

[0009] According to one aspect of the present invention, a cosmetic composition that exhibits a wide range of skin-improving effects can be provided. [Brief explanation of the drawing]

[0010] [Figure 1] This graph shows the test results regarding wrinkle improvement (effect on nasolabial folds) based on the examples. [Figure 2] This graph shows the test results regarding wrinkle improvement (effect on crow's feet) using the given examples. [Figure 3] This is a photograph showing the test results for Example 1. [Figure 4] This graph shows the test results regarding pore improvement based on the examples. [Modes for carrying out the invention]

[0011] <Two-part skin-improving cosmetic> One embodiment of the present invention is a two-component skin-improving cosmetic. In this specification, "skin improvement" refers to the cosmetic or aesthetic improvement of the skin, and more specifically, it may include improvement of one or more of the following: wrinkles, pores, sagging, and skin tone. The two-component skin-improving cosmetic according to this embodiment is particularly effective in improving wrinkles and pores. The cosmetic according to this embodiment is mainly applied to the face, but may also be applied to areas other than the face, such as the décolleté (neck, shoulders, and chest) and the back.

[0012] In this specification, "two-component type" refers to a form in which at least two compositions are mixed immediately before application to the skin. Therefore, the skin-improving cosmetic composition according to this embodiment is provided in a state in which the first part (first composition) and the second part (second composition) do not come into contact with each other. For example, the first part and the second part may be contained in separate containers, or the first part and the second part may be contained in different compartments within a single container having multiple compartments separated by partitions. In addition, the two-component skin-improving cosmetic composition according to this embodiment may include an additional part having a different composition from the first and second parts, in addition to the main first and second parts.

[0013] Furthermore, while the properties of the cosmetic composition in this form are not particularly limited, it is preferable that the mixture obtained by mixing the first and second parts be able to form a film of a certain thickness on the skin surface when applied to the skin surface. For example, it is preferable that it be able to form a film of 100 μm to 200 μm or more in the usual form of use. Therefore, it is preferable that the properties of the cosmetic composition in this form immediately before application to the skin be those of a gel, cream, baste, or balm.

[0014] The skin-improving cosmetic, when Part 1 and Part 2 are mixed, contains carboxyvinyl polymer, sodium silicate, glycylglycine, and water. This combination of components provides a cosmetic that exhibits a broad range of skin-improving effects. This skin-improving effect is immediate (i.e., effective even with a single use) and persists even after the cosmetic is washed off. More specifically, this form provides a cosmetic that exhibits excellent wrinkle-improving and / or pore-improving effects with both immediate and sustained efficacy.

[0015] In this specification, wrinkle-improving effect refers to reducing the depth, width, or length of wrinkles (groove-like depressions formed on the surface of the skin), or reducing the number of wrinkles, and thus smoothing the surface of the skin. Pore-improving effect refers to reducing the depth of pores, reducing the diameter of pores, or reducing the number of pores. Wrinkle-improving effect is also closely related to sagging-improving effect, etc. When the wrinkle-improving effect is enhanced, skin sagging is also reduced or eliminated, and the skin can become firmer. The effect of reducing wrinkles and sagging and providing firmness is sometimes called a lift-up effect. With this embodiment, skin improvement effects can be obtained immediately or instantly without performing surgical invasive procedures, and furthermore, the effect has long-lasting effects.

[0016] <Part 1 (Carboxyvinyl Polymer-Containing Compositions)> The first part of the two-component skin-improving cosmetic in this embodiment may be a composition containing a carboxyvinyl polymer and water, i.e., an aqueous dispersion or aqueous solution of carboxyvinyl polymer. Carboxyvinyl polymer (carbomer) is a cross-linked copolymer of acrylic acid. The inclusion of carboxyvinyl polymer in the first part enhances the ability to form a more uniform film (thin layer) that adheres more closely to the skin when the mixture obtained by mixing with the second part is applied to the skin. Furthermore, when the first and second parts are mixed, the carboxyvinyl polymer, in combination with sodium silicate contained in the second part, can create a good gel state in the cosmetic, and also exhibits an excellent wrinkle-improving effect, i.e., it shrinks the surface of the skin and makes grooves formed in the skin shallower or eliminates them. In addition, the carboxyvinyl polymer, when combined with sodium silicate and glycylglycine, can provide the two-component skin-improving cosmetic with excellent wrinkle-improving and pore-improving effects.

[0017] Specific examples of the carboxyvinyl polymer include Carbopol (registered trademark) 940, Carbopol 941, Carbopol 980, Carbopol 981 of Lubrizol Corporation, AQUPEC (registered trademark) HV-501E, AQUPEC HV-505E of Sumitomo Seika Chemicals Co., Ltd., Hibis Wako (registered trademark) 103, Hibis Wako 104, Hibis Wako 105 of Fuji Film Wako Pure Chemical Corporation, etc. Among them, Carbopol 980 is particularly preferred. The above carboxyvinyl polymers can be used alone or in combination of two or more kinds.

[0018] The content of the carboxyvinyl polymer is preferably 0.3% by mass or more and 5% by mass or less, more preferably 0.5% by mass or more and 3% by mass or less, still more preferably 0.8% by mass or more and 2% by mass or less based on the total amount of the first part. By setting the content of the carboxyvinyl polymer within the above range, the cosmetic obtained by mixing with the second part during use can have an appropriate viscosity, and when applied to the skin, a film having sufficient thickness and uniformity to exhibit a skin-improving effect can be formed. Also, the carboxyvinyl polymer can be well dispersed in the first part.

[0019] Also, the content of the carboxyvinyl polymer is preferably 0.2% by mass or more and 4% by mass or less, more preferably 0.4% by mass or more and 2% by mass or less based on the total amount of the first part and the second part. Further, the content of the carboxyvinyl polymer is preferably 0.2% by mass or more and 4% by mass or less, more preferably 0.4% by mass or more and 2% by mass or less based on the total amount of the cosmetic after mixing immediately before application.

[0020] The water contained in the first part may be purified water, ion-exchanged water, natural water, tap water, etc. The water is preferably 80% by mass or more and 99.7% by mass or less, more preferably 90% by mass or more and 98% by mass or less based on the total amount of the first part.

[0021] Part 1 may contain other ingredients besides those mentioned above. For example, Part 1 may contain amino acid, peptide, or protein-based agents (cosmetic ingredients) that can further enhance the skin-improving effect. By adding such cosmetic ingredients, the duration of the skin-improving effect, particularly the wrinkle-improving and / or pore-improving effect, can be increased. The above cosmetic ingredients can be used individually or in combination of two or more. Furthermore, such cosmetic ingredients may be included in Part 2, which will be described later, but it is preferable that they be included only in Part 1.

[0022] Furthermore, Part 1 may contain other ingredients such as antioxidants, plant-derived ingredients, animal-derived ingredients, emulsifiers, preservatives, colorants, surfactants, humectants, thickeners, and fragrances.

[0023] The emulsifier included in Part 1 may be a polymer emulsifier that assists in the dispersion of the carboxyvinyl polymer, for example, an acrylic polymer emulsifier having a hydrophilic group, specifically an acrylates / alkyl (C10-30) acrylate crosspolymer. The content of the polymer emulsifier may be 0.005 parts by mass or more and 0.5 parts by mass or less per 1 part by mass of the carboxyvinyl polymer.

[0024] <Part 2 (Sodium Silicate-Containing Compositions)> The second part of the two-component skin-improving cosmetic in this embodiment may be a composition containing sodium silicate and water, i.e., an aqueous dispersion of sodium silicate. The inclusion of sodium silicate in the second part enhances the skin's contracting effect, i.e., the effect of reducing the surface area of ​​the skin, when the mixture obtained by mixing the second part and the first part is applied to the skin, thereby improving skin firmness. Furthermore, when the first and second parts are mixed, sodium silicate, in combination with the aforementioned carboxyvinyl polymer contained in the first part, can create a good gel state in the cosmetic, resulting in an even better wrinkle-improving effect, i.e., reducing the surface area of ​​the skin and making grooves formed on the skin shallower or eliminating them. Moreover, sodium silicate, when combined with carboxyvinyl polymer and glycylglycine, can provide the two-component skin-improving cosmetic with excellent wrinkle-improving and pore-improving effects.

[0025] The sodium silicate used in this embodiment may contain one or more of the following: sodium metasilicate (Na2SiO3), sodium orthosilicate (Na4SiO4), sodium disilicate (Na2Si2O5), sodium tetrasilicate (Na2Si4O9), and their hydrated parts, and is preferably composed mainly of sodium metasilicate. Sodium silicate can generally be represented by the formula Na2O·nSiO2·xH2O. The coefficient n in this formula is the molar ratio (the molecular ratio of SiO2 to Na2O). From the viewpoint of appropriately adjusting the pH of the resulting cosmetic, the molar ratio of the sodium silicate used in this embodiment may be preferably 2 to 4, more preferably 2.3 to 3.5, and even more preferably 3.0 to 3.5.

[0026] Furthermore, when preparing Part 2, it is preferable to add the sodium silicate in a dispersed state in water. The dispersion of sodium silicate is preferably 25% by mass or more and 60% by mass or less, or preferably has a viscosity of 80 cp or more and 500 cp or less.

[0027] The sodium silicate content may be preferably 5% to 30% by mass, more preferably 7% to 22% by mass, and even more preferably 13% to 22% by mass, relative to the total amount of Part 2. By setting the sodium silicate content in Part 2 within the above range, the cosmetic composition obtained by mixing Part 1 and Part 2 can have an appropriate viscosity, and when applied to the skin, it can form a film with sufficient thickness and uniformity to produce a skin-improving effect. In addition, the sodium silicate in Part 2 can be well dispersed.

[0028] The sodium silicate content may be preferably 0.5% to 5% by mass, more preferably 1% to 4% by mass, relative to the total amount of Part 1 and Part 2. The sodium silicate content may be preferably 0.5% to 5% by mass, more preferably 1% to 4% by mass, relative to the total amount of the cosmetic composition after mixing immediately before application.

[0029] The water included in Part 2 may be purified water, deionized water, natural water, tap water, etc. The amount of water is preferably 75% by mass or more and 95% by mass or less, and more preferably 90% by mass or more and 98% by mass or less, relative to the total amount of Part 2.

[0030] Part 2 may contain other components besides those mentioned above. For example, other components contained in Part 2 may include antioxidants, preservatives, colorants, fragrances, etc. Furthermore, Part 2 may contain silicates other than sodium silicate, such as magnesium silicate, and salts other than silicates.

[0031] Part 1 and Part 2 can be combined in any amount, but the ratio of the amount of Part 1 (W1) to the amount of Part 2 (W2) (W1 / W2) is preferably 3 to 10, and more preferably 4 to 8. By combining Part 1 and Part 2 in the above ratio, Part 1 and Part 2 can be mixed well, and a film with sufficient thickness and uniformity to fully exhibit skin-improving effects can be formed on the skin. In addition, the pH of the mixture of Part 1 and Part 2 can be set to a range that is good for the skin.

[0032] Also, the mass (w) of the carboxyvinyl polymer CV ) Mass of sodium silicate (w SC The value of the ratio (w) to ) CV / w SC The ratio of carboxyvinyl polymer to sodium silicate is preferably 0.2 to 0.6, more preferably 0.31 to 0.45, and even more preferably 0.3 to 0.42. When carboxyvinyl polymer and sodium silicate are mixed in the above ratio, the mixture has an appropriate viscosity and aggregation is suppressed, so that a film with a thickness and uniformity that provides good skin-improving effects can be formed on the skin. Furthermore, operability is also improved.

[0033] The pH of the cosmetic composition when Part 1 and Part 2 are mixed is preferably 6.2 to 11.1, more preferably 10.0 to 11.0, and even more preferably 10.0 to 10.9.

[0034] Both Part 1 and Part 2 may be fluid, water-based liquids. Furthermore, it is desirable that the cosmetic mixture of Part 1 and Part 2 also be fluid.

[0035] <Glycylglycine> In this embodiment, Part 1, Part 2, or both may contain glycylglycine. The inclusion of glycylglycine enhances the pore-improving effect of the resulting cosmetic, as well as its wrinkle-improving effect. Therefore, it is possible to provide a cosmetic that exhibits a broader range of skin-improving effects from a cosmetic perspective.

[0036] In the two-component skin-improving cosmetic composition of this form, the glycylglycine content may be preferably 0.01% to 5% by mass, more preferably 0.03% to 3% by mass, relative to the total amount of Part 1 and Part 2 described below. By setting the glycylglycine content within the above range, the wrinkle-improving effect and pore-improving effect, particularly the pore-improving effect, can be enhanced. Furthermore, the glycylglycine content may be preferably 0.01% to 5% by mass, more preferably 0.03% to 3% by mass, relative to the total amount of the cosmetic composition after mixing immediately before application.

[0037] Furthermore, it is preferable that the second part contains glycylglycine, as this facilitates the preparation of each part. If the second part contains glycylglycine, the glycylglycine content may be preferably 0.05% by mass or more and 10% by mass or less, and more preferably 0.1% by mass or more and 5% by mass or less, relative to the total amount of the second part. [Examples]

[0038] <Preparation of a two-part skin-improving cosmetic> In this example, two parts were prepared: Part 1, containing carboxyvinyl polymer and water, and Part 2, containing sodium silicate, glycylglycine, and water.

[0039] (Part 1 Preparation Examples I-1 to I-3) Carboxyvinyl polymer ("Carbopol 980," Lubrizol) and deionized water were mixed, then a mixture of acrylates / alkyl acrylate (C10-30) crosspolymer ("PEMULEN TR-2," Lubrizol) and water was added, followed by the sequential addition and mixing of other components. A stirrer was used for mixing. The content ratios of each component are shown in Table 1.

[0040] (Part 2 Preparation Examples II-1~II-3) After mixing glycylglycine and water, a sodium silicate dispersion (sodium silicate "No. 3", Fuji Chemical Co., Ltd.) was added and stirred, then mixed using a stirrer. The content ratios of each component are shown in Table 2.

[0041] Parts 1 and 2 were placed in containers in the ratios shown in Table 3 and mixed using a commercially available spatula to obtain Examples 1-9.

[0042] [Table 1]

[0043] [Table 2]

[0044] [Table 3]

[0045] <Rating> (pH) The pH of each sample was measured using a pH meter (LAQUA F-72, manufactured by Horiba, Ltd.) and evaluated according to the following criteria. A: 10.0 or more and 10.9 or less B: 6.2 or higher and less than 10, or greater than 10.9 and less than or equal to 11.1 C: Less than 6.2 or greater than 11.1

[0046] (Gelated state) The state of each example after mixing was evaluated by applying the composition of each example to the skin, according to the following criteria. A: We were able to form a coating film with a nearly uniform thickness. B: It was possible to apply it to the skin, but it tended to be watery or to clump together. C: The material was watery or highly aggregated, making it difficult to form a coating film suitable for use as a cosmetic.

[0047] Table 3 shows the evaluation results for pH and gelation state.

[0048] (Wrinkle-improving effect) The cosmetic product from Example 1 was applied to 10 subjects aged 40 to 60, and the improvement in wrinkles was evaluated. 7g of the cosmetic product, immediately after mixing, was applied to the entire face of each subject, and the product was washed off once the film of the cosmetic product had dried. Wrinkle depth was then measured over time and also observed visually. Wrinkle depth was measured using PRIMOS (Canfield Imaging Systems). Furthermore, wrinkle depth was measured over time and also observed visually.

[0049] Figure 1 shows the results for nasolabial folds, and Figure 2 shows the results for crow's feet. In both cases, the values ​​shown were the average values ​​obtained from all subjects. A control group was used for subjects without cosmetic application. Figure 3 shows photographs taken immediately after application (0 hours), 1 hour, 3 hours, and 6 hours after application for crow's feet. The upper part of Figure 3 shows photographs of the eye area, and the lower part shows color height maps corresponding to each of the upper photographs.

[0050] (Pore improvement effect) The cosmetic product from Example 1 was applied to the entire face of 10 subjects aged 40 to 60, and the improvement in pores was evaluated. The number of pores was counted before application, and immediately after the film dried and was washed off (0 hours), 1 hour, and 6 hours after application. The number of pores was counted using VISIA® Evolution (Canfield Imaging Systems). Facial images were taken, and the values ​​analyzed with dedicated software were used. The results are shown in Figure 4.

[0051] As shown in Figures 1 to 3, it was found that the two-component cosmetic formulation in this form immediately reduced wrinkles after application, and that this effect persisted even after 6 hours.

[0052] Furthermore, as shown in Figure 4, the number of pores was also reduced after application, and this effect persisted even after 6 hours.

[0053] This application claims priority based on Japanese Patent Application No. 2021-147062, filed on September 9, 2021, the entire contents of which are incorporated herein by reference.

Claims

1. A two-component skin-improving cosmetic used to form a film on the skin, Part 1 comprises a carboxyvinyl polymer and water, It has two parts, one containing sodium silicate and water. At least one of the first and second parts contains glycylglycine, A two-component skin-improving cosmetic, wherein the water content of the second part is 75% by mass or more and 95% by mass or less of the total amount of the second part.

2. The two-component skin-improving cosmetic composition according to claim 1, wherein the content of the carboxyvinyl polymer is 0.3% by mass or more and 5% by mass or less based on the total amount of the first part.

3. The two-component skin-improving cosmetic composition according to claim 1 or 2, wherein the sodium silicate content is 5% by mass or more and 30% by mass or less based on the total amount of the second part.

4. The two-component skin-improving cosmetic composition according to claim 1 or 2, wherein the amount of glycylglycine is 0.01% by mass or more and 5% by mass or less based on the total amount of the first and second parts.

5. The two-component skin-improving cosmetic composition according to claim 1 or 2, wherein the ratio of the mass of the first part to the mass of the second part is 3 or more and 10 or less.

6. The two-component skin-improving cosmetic composition according to claim 1 or 2, wherein the mass ratio of the carboxyvinyl polymer content to the sodium silicate content is 0.3 or more and 0.46 or less.

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