Liquid transparent composition for makeup removal

Abstract

The present invention relates to a skin cleaning composition, and more particularly to a face cleaning composition that is particularly useful and effective for removing makeup. The composition is provided in the form of a two-layer composition having an oil layer on top of an aqueous layer, both of which are transparent. When shaken, the composition forms a micelle-like, translucent or cloudy liquid, which returns to a two-layer composition over time.

Description

Technical Field

[0001] The present invention relates to a skin cleansing composition, and more particularly to a face cleansing composition that is particularly useful and effective for removing makeup. The compositions are provided in the form of a two-layer composition in which an oil layer overlays a transparent aqueous layer. The compositions form a micellar semi-transparent or turbid liquid upon shaking and return to the two-layer composition over time.

Background Art

[0002] People prefer to use cosmetics, especially on the face and other exposed parts of the body, to obtain various advantages such as, for example, evening out skin tone, smoothing age-related fine lines, imparting brightness, and obtaining a sun protection effect. Furthermore, makeup products such as lipsticks, foundations, and mascaras are used to beautify the face according to personal preferences. These products contain a variety of ingredients, including particles such as pigments, inorganic particles, powders, and sunscreens; oily components such as organic sunscreens, skin softeners, and solvents; water-soluble components such as humectants and polymers; and other skin care active substances such as vitamins and anti-aging active substances. Such leave-on cosmetics and makeup products are formulated to have high persistence on the skin. Such products maintain their efficacy on the skin and are stable even during long-term use, for example, for 8 to 12 hours, and are praised for not smudging, getting dirty, or running when the person is exposed to external conditions such as sweating, sunlight, polluted, or dry environmental conditions such as a room with heating or air conditioning. While such products must have high persistence on the skin, on the other hand, it is necessary that consumers only need to use a simple, safe, and low-irritant wash-off type makeup remover product that can be used to easily remove leave-on type cosmetics / makeup products without requiring excessive mechanical friction.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The most commonly used skin cleansing products contain a combination of synthetic surfactants and soap (often called a soap-synthetic detergent composition) that emulsifies oils and fine particles to achieve the desired cleansing effect. However, such compositions are often found to be insufficient in terms of facial makeup removal efficiency. Micelle solutions, in which a small amount of oil is emulsified at the micelle level within the composition, are also frequently used for makeup removal. Such compositions are often cloudy and not very appealing to consumers. Furthermore, the inventors found room for further improvement in makeup removal efficacy. The inventors desired to provide the product in a form that is attractive to consumers, such as a two-layer composition. After extensive experimentation with numerous emulsifiers to provide a product in a two-layer form, the inventors arrived at the present invention, which uses a specific surfactant that can form a highly transparent two-layer composition, forming a micelle solution upon shaking but returning to a transparent two-layer form over time. The composition of the present invention has been found to have a far superior makeup removal effect compared to similar commercially available products and to conventional micelle solutions used for this purpose.

[0004] Therefore, the object of the present invention is to provide a face-cleaning composition with high makeup-removing effect.

[0005] Another object of the present invention is to provide a highly efficient makeup remover and facial cleanser composition in the form of an attractive transparent two-layer structure.

[0006] Another object of the present invention is to be formulated in the form of a bilayer composition that has a high makeup removal effect, forms a micelle solution when shaken, but returns to a bilayer form over time. [Means for solving the problem]

[0007] The present invention (i) an oil layer of 10-45% by weight; and (ii) A layer of water containing 55-90% by weight A liquid transparent composition for makeup removal containing, The aforementioned aqueous layer (a) A humectant in an amount of 0.1 to 10% by weight of the composition; and (b) 0.01 to 1.2% by weight of the composition of cetylpyridinium halide The present invention provides a composition containing the following: [Modes for carrying out the invention]

[0008] These and other aspects, features and advantages will become apparent to those skilled in the art by reading the following detailed description and the attached claims. To avoid doubt, any feature of one aspect of the present invention may be utilized in any other aspect of the present invention. The expression “comprising” is intended to mean “including,” but not necessarily “consisting” or “composed of.” In other words, the steps or options described do not need to be comprehensive. It should be noted that the examples described below are intended to clarify the present invention and not to limit the present invention to those examples themselves. Similarly, all percentages are by weight / weight percent unless otherwise indicated. Except as in the examples and comparative examples, or unless expressly indicated, all figures expressed in this “Detailed Description” and “Claims” regarding the quantity of material or reaction conditions, physical properties of material and / or use should be understood as being modified by the word “about.” Numerical ranges expressed in the form “from x to y” are understood to include x and y. When multiple preferred ranges for a particular feature are described in the form "from x to y," it is understood that all ranges combining different endpoints will also be considered.

[0009] The topical compositions of the present invention are intended for use in personal care or makeup removal applications and may also be referred to as personal care compositions or makeup removal compositions. As used herein, “makeup removal composition” means compositions for topical application, i.e., application to the outer surface of human skin. Such compositions are generally wash-off types and include products used on the skin for appearance improvement, cleansing, odor control, or general cosmetic purposes. The compositions of the present invention are preferably wash-off cleansing compositions comprising two layers and may also be referred to as two-layer compositions. The two-layer compositions of the present invention have an oil layer above a water layer. Both layers are substantially transparent. “Transparent” means that the transparency, as measured by the following method, is in the range of 70–100%.

[0010] The two-layer composition in the container was shaken up and down 10 times, and then allowed to stand for 24 hours. Next, the transmittance of the aqueous layer and the oil layer was measured. This was done by taking 2 mL of the target layer into a 10 mm quartz cell and measuring the transmittance at 420 nm relative to distilled water as a control sample using a UV-Vis spectrophotometer. In the composition of the present invention, the transparency of the oil layer was found to be in the range of 80-100% of the control sample, and the transparency of the aqueous layer was found to be in the range of 70-100% of the control sample.

[0011] As used herein, “skin” means skin of the face and body parts (e.g., neck, arms, hands, feet and scalp), which are exposed areas to which a person tends to apply leave-on cosmetic compositions, in particular makeup compositions.

[0012] The composition of the present invention is a so-called wash-off or rinse-off type cleaning product. The composition is typically applied to a localized surface, such as the face, and then wiped off with a wipe paper, tissue, or cloth after a few minutes, or rinsed off with plenty of water.

[0013] The compositions of the present invention each contain two transparent layers. An oil layer is at the top, and a water layer is below it. The oil layer accounts for 10-45%, preferably 25-35%, of the total weight of the composition.

[0014] The aqueous layer accounts for 55-90%, preferably 65-75%, of the total weight of the composition. The aqueous layer contains a highly selective surfactant, namely a cetylpyridinium halide, to obtain the effects of the present invention. The inventors experimented with numerous surfactants of various concentrations to meet the dual requirements of the present invention, namely, to obtain a micelle solution while ensuring the aqueous layer remains transparent when mixing the oil and aqueous layers to form a single-phase liquid. It is also necessary that the two layers be reformed after the micelle solution is allowed to stand for a certain period of time. Various types of surfactants were tested, for example, caprylyl / capryl glucoside, decyl glucoside, PPG9, Tween80, and sodium diethylhexyl sulfosuccinate, but none exhibited the desired behavior except for the cetylpyridinium halide. With ineffective surfactants, shaking either did not yield a micelle composition or did not return the original clean and transparent oil and aqueous layers. The cetylpyridinium halide is a chloride or bromide, preferably a chloride. The aqueous layer contains 0.01 to 2.5%, preferably 0.01 to 0.8%, of cetylpyridinium halide by weight of the composition.

[0015] The aqueous layer also contains a humectant, which is preferably a polyhydric alcohol. Suitable polyhydric alcohols for use in the composition of the present invention are glycerol, 1,3-butylene glycol, propylene glycol, 1,3-propanediol, pentylene glycol, hexylene glycol, and sorbitol. Glycerol and pentylene glycol are even more preferred humectants, with glycerol being the most preferred. The aqueous layer contains 0.1 to 10%, preferably 0.1 to 7%, of the humectant by weight of the composition.

[0016] The aqueous layer may contain specific skincare active ingredients. If so, these active ingredients are selected from one or more of the following: niacinamide, allantoin, vitamin C, vitamin B5, vitamin K, and sodium hyaluronate. The skincare active ingredients are contained in the composition at a total weight of 0.01 to 0.5% by weight, preferably 0.05 to 0.2% by weight.

[0017] Water is preferably included in the composition in an amount of 45-80% by weight, preferably 65-75% by weight.

[0018] The composition of the present invention includes an oil layer present in an amount of 10 to 45% by weight, preferably 25 to 35% by weight, of the composition. Oils that can be used to constitute the oil layer include silicones, C 10 ~C 18 Branched or linear alkanes, and C 10 ~C 18 Selected from one or more fatty acid esters. If silicone is included, it may account for 15-25% by weight of the composition. 10 ~C 18 If an alkane is included, it is preferably a branched chain. A useful alkane is isohexadecane. If an alkane is used, it is preferably included in 1-8% by weight of the composition. 10 ~C 18 Suitable oils that are fatty acid esters are isopropyl myristate or isopropyl palmitate, preferably isopropyl myristate. When fatty acid esters are used, they are preferably included in the composition at a concentration of 0.1 to 5% by weight.

[0019] The composition of the present invention is configured such that the density of the oil layer is lower than the density of the water layer, thereby ensuring that the oil layer is on top of the water layer. Since this composition is formulated as a two-layer composition, when the composition is shaken, the two layers are mixed to form a temporary micelle-like, semi-transparent or cloudy single phase. Subsequently, when this single phase is left to stand for a certain period of time, preferably 10 minutes to 24 hours, preferably 15 minutes to 20 hours, preferably 30 minutes to 16 hours, preferably 1 hour to 12 hours, preferably 2 hours to 8 hours, and preferably 3 hours to 4 hours, it returns to the original transparent two-layer composition.

[0020] The composition of the present invention may contain a colorant. The colorant is preferably soluble in the layer in which it is contained. Therefore, the colorant contained in the aqueous layer is preferably soluble in the aqueous layer. The colorant contained in the oil layer is preferably soluble in the oil layer. The colorant may be contained in both layers, but it is preferably contained only in one layer in order to achieve a visual contrast between the two layers. The colorant is preferably contained in the oil layer. When the colorant is contained, it is present in the composition at 0.00001 to 0.0001% by weight.

[0021] The composition of the present invention may contain other known components such as electrolytes, fragrances, preservatives, and buffers.

[0022] Hereinafter, the present invention will be described using the following examples.

Examples

[0023] Example 1 A bilayer composition shown in Table 1 below was prepared.

[0024] Table 1

Table 1

[0025] The makeup-removing efficacy of the composition according to Example 1 of the present invention was compared with a known commercially available bilayer composition (Example A) described as having the following main components on the back of the package.

[0026] Example A Water, cyclopentasiloxane, isohexadecane, benzyl alcohol, benzyl salicylate, decyl glucoside, disodium EDTA, hexylene glycol, dipotassium phosphate, potassium phosphate, sodium chloride, and fragrance.

[0027] The makeup remover test was conducted with 25 panelists. The panelists used the product, and all panelists used the same makeup composition in the same manner. The percentage of panelists who rated the product as "good or very good" is shown in Table 2 below.

[0028] Table 2 [Table 2] The data in Table 2 above shows that the composition according to the present invention (Example 1) is far more preferable than the commercially available composition outside the present invention (Example A) in all measured makeup remover efficacy parameters.

[0029] Furthermore, the biphasic compositions shown in Table 3 below were prepared.

[0030] Table 3 [Table 3] The oil and water layers of these compositions were mixed vertically 5 to 8 times to form a translucent or turbid single phase. The time required for these compositions to return to their original transparent two layers was visually evaluated and found to be as shown in Table 4 below.

[0031] Table 4 [Table 4]

Claims

1. (i) an oil layer of 10 to 45% by weight; and (ii) A layer of water containing 55-90% by weight A liquid transparent composition for makeup removal containing, The aforementioned aqueous layer (a) A humectant in an amount of 0.1 to 10% by weight of the composition; and (b) 0.01 to 0.8% by weight of the composition of cetylpyridinium halide Includes, The humectant is a composition selected from one or more polyhydric alcohols, preferably glycerol, pentylene glycol, and mixtures thereof.

2. The composition according to claim 1, wherein the cetylpyridinium halide is cetylpyridinium chloride.

3. The composition according to any one of the claims, wherein the aqueous layer contains a skincare active ingredient selected from one or more of niacinamide, allantoin, vitamin C, vitamin B5, vitamin K, and sodium hyaluronate.

4. The composition according to any one of the claims, comprising 45 to 80% water by weight.

5. The oil layer contains silicones, C １０ ~C １８ Branched or linear alkanes, and C １０ ~C １８ The composition according to any one of the claims, comprising an oil selected from one or more fatty acid esters.

6. The composition according to any one of the claims, wherein the density of the oil layer is lower than the density of the water layer, so that the oil layer is above the water layer.

7. The composition according to any one of the claims, wherein when shaken, it mixes to form a temporary micelle-like, translucent or turbid single phase, and then returns to the original transparent two-layer composition.

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