A uniform, transparent and moisturizing liquid oil-phase makeup cleanser

Abstract

The present invention provides a liquid oil-phase makeup cleanser, which comprises: a polyglycerol surfactant, glycerol, oil and an optional auxiliary agent; wherein the polyglycerol surfactant comprises polyglycerol-10 diisostearate and polyglycerol-6 dicaprate, and the mass of the glycerol is more than 5% and less than 45% of the total mass of the liquid oil-phase makeup cleanser. The liquid oil-phase makeup cleanser of the present invention can still maintain uniformity, stability and transparency under the premise of adding a large amount of glycerol, and the makeup removal effect remains unchanged while the moisturizing degree of the liquid oil-phase makeup cleanser is improved, and a warm feeling can also be generated during the use of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to a uniform, transparent, and moisturizing liquid oil-phase makeup cleanser. Background Art

[0002] With the accelerated development of the cosmetics market, "makeup removal" has also attracted more and more attention from consumers, and "complete makeup removal" has become the focus of consumers' attention and one of the important links in skin protection. The market contains makeup removal products such as makeup remover water, makeup remover cream and makeup remover oil. Among them, makeup remover oil has a strong ability to remove makeup by "dissolving oil with oil". It does not need to be supplemented with cotton pads, thereby reducing damage to the skin. It is suitable for large-area makeup removal, so it has become one of the main choices in the makeup removal product category. However, since the main body of makeup remover oil is a large amount of oil, there will be the following problems: 1. It will produce a greasy or sticky feeling during use; 2. Because the makeup remover oil is spread on the skin as a uniform oil film, the emulsification speed is slow when it is emulsified with water, and even the emulsification is insufficient and incomplete, affecting the makeup removal effect; 3. Because oil and skin oil are compatible, when the makeup removal force is too strong, not only the makeup is taken away during the makeup removal process, but also a small amount of skin oil, which makes the skin tight, and long-term use will lead to dry skin.

[0003] The prior art discloses makeup remover oil formulas that meet various needs. For example, in terms of gentle makeup removal, CN114129463A discloses a makeup remover oil of a polyglycerol emulsifier and a preparation method. The makeup remover oil using the polyglycerol emulsifier can have a good makeup removal effect, and is mild and does not irritate the eyes and skin, and has good affinity, is easy to clean, and is easy to use; CN 114366701 A discloses a green and natural mild makeup remover oil with deep cleansing effect, and the makeup remover oil includes a polyglycerol emulsifier, plant oils, plant extracts, plant-derived antioxidants and essential oils. Further, CN 107343858A discloses a double-layer warm-sensing makeup remover, which proposes an upper layer of refreshing oil esters and a bottom layer of water-based essences. Simply shake before use, and quickly separate after placement, with a clear dividing line, obvious contrast between the two layers, and beautiful appearance. The oil ester and water-based essence are prepared in a ratio of 1:6-1:3, and there is a warm feeling when applied, which can relax pores. The patent proposes a method for adding a moisturizer, using a double-layer uneven two-phase method to introduce glycerin into the formula system; CN 113576950 A discloses a preparation for a makeup remover oil, in which polyols such as dipropylene glycol, butylene glycol, 1,2-propylene glycol, and 1,3-propylene glycol are added, but the total amount added is less than 5%.

[0004] In the above patents, milder polyglycerol series surfactants are used, but polyols are not added to the "pure oil" system, or a large amount of glycerol is added to the water phase, or the total content of polyols added to the "pure oil" system does not exceed 5%. However, adding glycerol to the "pure oil" makeup removal system can alleviate the practical problems of the above makeup removal oil, so it is necessary to develop a glycerol-containing, polyglycerol-based surfactant to form a uniform, transparent and stable liquid oil phase makeup cleanser formula. Summary of the invention

[0005] The present invention aims to provide a liquid oil-phase makeup cleanser which has a glycerin content greater than 5%, does not contain an aqueous phase and is uniform, stable and transparent.

[0006] The first aspect of the present invention provides a liquid oil-phase makeup cleanser, which comprises: a polyglycerol surfactant, glycerol, oil and an optional auxiliary agent; wherein the polyglycerol surfactant comprises polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate, and the mass of the glycerol is greater than 5% and less than 45% of the total mass of the liquid oil-phase makeup cleanser.

[0007] In one or more embodiments, the polyglycerol-based surfactant is a polyglycerol-based surfactant having two or more branched chains and an HLB value of 13 or less.

[0008] In a preferred embodiment, the polyglycerol-based surfactant is any one or both of polyglycerol-10 pentaoleate and polyglycerol-10 dioleate.

[0009] In a preferred embodiment, the polyglycerol surfactant consists of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate, or consists of polyglyceryl-10 diisostearate, polyglyceryl-6 dicaprate, polyglyceryl-10 pentaoleate and polyglyceryl-10 dioleate.

[0010] In one or more embodiments, in the liquid oil-phase cosmetic cleanser, the mass of the polyglycerol-based surfactant is 10%-30% of the total mass of the liquid oil-phase cosmetic cleanser.

[0011] In one or more embodiments, the mass of the polyglycerol-based surfactant is 10%-25% of the total mass of the liquid oil-phase cosmetic cleanser.

[0012] In one or more embodiments, the mass of the polyglycerol-based surfactant is 10%-20% of the total mass of the liquid oil-phase cosmetic cleanser.

[0013] In one or more embodiments, the mass of the polyglycerol surfactant is 12%-20% of the total mass of the liquid oil-phase cosmetic cleanser.

[0014] In one or more embodiments, in the liquid oil-phase cosmetic cleanser, based on the total mass of the liquid oil-phase cosmetic cleanser, the content of the polyglyceryl-10 diisostearate is 3%-10%, preferably 4%-9%; the content of the polyglyceryl-6 dicaprate is 3%-10%, preferably 4%-8% or 4%-6%.

[0015] In a preferred embodiment, in the liquid oil-phase cosmetic cleanser, the mass ratio of the polyglyceryl-10 diisostearate to the polyglyceryl-6 dicaprate is 0.5-2, such as 0.6-1.7. In a preferred embodiment, the mass ratio of the polyglyceryl-10 diisostearate to the polyglyceryl-6 dicaprate is 2:3-3:2.

[0016] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the content of the polyglyceryl-10 pentaoleate is 0%-5%, such as 1%-5% or 2%-4%.

[0017] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the content of the polyglyceryl-10 dioleate is 0%-10%, such as 4%-10% or 5%-8%.

[0018] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser contains 3%-10%, preferably 4%-9%, of polyglyceryl-10 diisostearate, and 3%-10%, preferably 4%-8% or 4%-6%, of polyglyceryl-6 dicaprate, or consists of them.

[0019] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser contains 5%-10%, preferably 6%-9% of polyglyceryl-10 diisostearate, and 3%-10%, preferably 3%-6% of polyglyceryl-6 dicaprate, or consists of them.

[0020] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser contains 5%-10%, preferably 7%-9% of polyglyceryl-10 diisostearate, 5%-10%, preferably 5%-8% of polyglyceryl-6 dicaprate, 2%-8%, preferably 2%-5% of polyglyceryl-10 pentaoleate, and 5-10%, preferably 6%-9% of polyglyceryl-10 dioleate, or consists of.

[0021] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser contains 3%-8%, preferably 3%-6%, of polyglyceryl-10 diisostearate, 3%-9%, preferably 3%-7%, of polyglyceryl-6 dicaprate, 2%-8%, preferably 2%-5%, of polyglyceryl-10 pentaoleate, and 5-10%, preferably 6%-9%, of polyglyceryl-10 dioleate, or consists of.

[0022] In one or more embodiments, the mass of the glycerin is 5%-40%, or 5%-35%, 5%-30%, 5%-25%, 9%-25% or 9%-20% of the total mass of the liquid oil-phase cosmetic cleanser.

[0023] In one or more embodiments, in the liquid oil-phase cosmetic cleanser, the mass of glycerin is 0.6-2 times, such as 0.8-1.8 times, the mass of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate.

[0024] In one or more embodiments, the oil is selected from one or more of coconut oil caprylate / caprate, isononyl isononanoate, dicaprylyl carbonate, cetyl ethylhexanoate, cetearyl ethylhexanoate or ethylhexyl palmitate.

[0025] In one or more embodiments, the oil is cetyl ethylhexanoate.

[0026] In one or more embodiments, the mass of the oil is 50%-85% of the total mass of the liquid oil-phase cosmetic cleanser.

[0027] In one or more embodiments, the mass of the oil is 50%-75% of the total mass of the liquid oil-phase cosmetic cleanser.

[0028] In one or more embodiments, the auxiliary agent is selected from one or more of a preservative, a skin conditioner, a plant essential oil, and a plant extract.

[0029] In one or more embodiments, the weight of the auxiliary agent is less than 5% of the total weight of the liquid oil-phase cosmetic cleanser.

[0030] In one or more embodiments, the weight of the auxiliary agent is less than 1% of the total weight of the liquid oil-phase cosmetic cleanser.

[0031] In one or more embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the liquid oil-phase cosmetic cleanser comprises:

[0032] Polyglycerol surfactant 10wt%-30wt%,

[0033] Glycerol 5wt%-30wt%,

[0034] Grease 50wt%-85wt%, and

[0035] Auxiliary agent 0wt%-5wt%.

[0036] In one or more embodiments, the liquid oil-phase makeup cleanser comprises, based on the total weight of the liquid oil-phase makeup cleanser, 3.5-5.5% of polyglyceryl-10 diisostearate, 5.5-6.5% of polyglyceryl-6 dicaprate, 8-10% of glycerin and 78-82% of cetyl ethylhexanoate.

[0037] In one or more embodiments, the liquid oil-phase makeup cleanser comprises, based on the total weight of the liquid oil-phase makeup cleanser, 7.0-8.0% of polyglyceryl-10 diisostearate, 4.5-5.5% of polyglyceryl-6 dicaprate, 15-25% of glycerin and 65-75% of cetyl ethylhexanoate.

[0038] In one or more embodiments, the liquid oil-phase makeup cleanser comprises, based on the total weight of the liquid oil-phase makeup cleanser, 8.5-9.5% of polyglyceryl-10 diisostearate, 5.5-6.5% of polyglyceryl-6 dicaprate, 2.5-3.5% of polyglyceryl-10 pentaoleate, 6.5-7.5% of polyglyceryl-10 dioleate, 25-30% of glycerin and 45-55% of cetyl ethylhexanoate.

[0039] In one or more embodiments, the liquid oil-phase makeup cleanser comprises, based on the total weight of the liquid oil-phase makeup cleanser, 3.5-4.5% of polyglyceryl-10 diisostearate, 4.5-5.5% of polyglyceryl-6 dicaprate, 2.5-3.5% of polyglyceryl-10 pentaoleate, 6.5-7.5% of polyglyceryl-10 dioleate, 5-15% of glycerin and 68-72% of cetyl ethylhexanoate.

[0040] The second aspect of the present invention provides the use of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate in increasing the solubility of glycerol in a cosmetic oil phase, or in improving the uniformity, transparency and stability of a cosmetic oil phase containing more than 5 wt % of glycerol.

[0041] In one or more embodiments, the cosmetic is the liquid oil-phase cosmetic cleanser described in any embodiment herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The liquid oil-phase makeup cleansing agent of Example 1-4 (A) and Comparative Example 1-9 (B). Figure 1(A) from left to right are respectively Example 1, Example 2, Example 3 and Example 4; Figure 1 (B) From top to bottom are the first row and the second row, the first row from left to right are Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, and the second row from left to right are Comparative Example 5, Comparative Example 6, Comparative Example 7, Comparative Example 8 and Comparative Example 9.

[0043] Figure 2 This is a schematic diagram of the compatibility of commonly used oils. The oils from left to right are: Isononyl Isononanoate, Coconut Oil Caprylate / Caprate, Dicaprylyl Carbonate, Cetearyl Ethylhexanoate, Cetyl Ethylhexanoate, Ethylhexyl Palmitate.

[0044] Figure 3 Schematic diagram of the makeup removal power of liquid oil-based makeup cleansers. Figure 3 (A) The upper row is before using the liquid oil-phase makeup cleanser of Comparative Example 10, Figure 3 (A) The lower row is after using the liquid oil-phase makeup cleanser of Comparative Example 10; Figure 3 (B) The top row is before using the liquid oil-phase makeup cleanser of Example 3. Figure 3 (B) The lower row shows the results after using the liquid oil-phase makeup cleanser of Example 3. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to understand the characteristics and effects of the present invention, the following is a general description and definition of the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used in the text are the common meanings understood by those skilled in the art for the present invention. In the event of a conflict, the definition in this specification shall prevail.

[0046] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0047] Herein, “comprising”, “including”, “containing” and similar terms encompass the meanings of “consisting essentially of” and “consisting of”. For example, when “A comprises B and C” is disclosed herein, “A consists essentially of B and C” and “A consists of B and C” should be deemed to be disclosed herein.

[0048] In this article, all features such as values, quantities, contents and concentrations defined in the form of numerical ranges or percentage ranges are only for brevity and convenience. Accordingly, the description of numerical ranges or percentage ranges should be considered to have included and specifically disclosed all possible secondary ranges and individual values ​​within the range (including integers and fractions).

[0049] Herein, unless otherwise specified, percentage refers to mass percentage, ratio refers to mass ratio, and part refers to mass part.

[0050] Herein, when describing embodiments or examples, it should be understood that they are not used to limit the present invention to these embodiments or examples. On the contrary, all substitutes, improvements and equivalents of the methods and materials described in the present invention can be included in the scope limited by the claims.

[0051] Herein, the sum of the percentages of the various components of the composition is 100%.

[0052] In this document, in order to make the description concise, not all possible combinations of various technical features in various embodiments or examples are described. Therefore, as long as there is no contradiction in the combination of these technical features, the various technical features in various embodiments or examples can be combined arbitrarily, and all possible combinations should be considered to be within the scope of this specification.

[0053] A certain amount of glycerin is often added to existing makeup removers to achieve a moisturizing effect. However, since glycerin is hydrophilic and incompatible with other ingredients in makeup removers, the content of glycerin in makeup removers is usually less than 5wt%, resulting in limited moisturizing effect; if the glycerin content is increased, it is difficult to form a uniform and stable makeup remover. After extensive and in-depth research, the inventors found that by compounding polyglycerol surfactants, a uniform and transparent liquid oil-phase makeup cleanser can be obtained while adding a large amount of glycerin. The liquid oil-phase makeup cleanser has good stability, good skin feel, and excellent makeup removal effect. In addition, due to the addition of a large amount of glycerin, the greasy feeling during the use of makeup remover products by consumers is reduced; and because glycerin is hydrophilic, it can assist the affinity of makeup remover oil and water when emulsified with water, increase the emulsification speed of makeup remover oil, and improve the makeup removal effect; the moisturizing property of glycerin can also alleviate problems such as skin tightness and dryness after using makeup remover products; when the amount of glycerin added reaches more than 5wt%, it can also bring a warm feeling, which improves the skin feel of consumers when using it in winter.

[0054] Therefore, the present invention provides a liquid oil-phase cosmetic cleanser, which comprises: a polyglycerol surfactant, glycerin, oil, and an optional auxiliary agent.

[0055] Herein, the polyglycerol surfactant is preferably a polyglycerol surfactant having more than two side chains and an HLB value of less than 13. Herein, the mass of the polyglycerol surfactant may be 10%-30%, preferably 10%-25%, more preferably 10%-20% or 12%-20% of the total mass of the liquid oil-phase makeup cleanser.

[0056] Polyglycerol surfactants with more than two side chains and HLB values ​​below 13 known in the art can be used in the present invention. In a preferred embodiment, the liquid oil-phase makeup cleanser of the present invention contains at least polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate. Preferably, in the liquid oil-phase makeup cleanser of the present invention, the content of polyglyceryl-10 diisostearate is 3%-10%, preferably 4%-9%, based on the total mass of the liquid oil-phase makeup cleanser. Preferably, in the liquid oil-phase makeup cleanser of the present invention, the content of polyglyceryl-6 dicaprate is 3%-10%, preferably 4%-8% or 4%-6%, based on the total mass of the liquid oil-phase makeup cleanser. Preferably, in the liquid oil-phase makeup cleanser of the present invention, the mass ratio of polyglyceryl-10 diisostearate to polyglyceryl-6 dicaprate is 0.5-2, such as 0.6-1.7. In some embodiments, the mass ratio of polyglyceryl-10 diisostearate to polyglyceryl-6 dicaprate is 2:3-3:2.

[0057] In addition to polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate, the polyglycerol surfactants suitable for the present invention may also include other types of polyglycerol surfactants, preferably polyglycerol surfactants having more than two side chains and an HLB value below 13, such as polyglyceryl-10 dioleate and polyglyceryl-10 pentaoleate.

[0058] In some embodiments, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser of the present invention contains polyglyceryl-10 diisostearate, polyglyceryl-6 dicaprate, and one or two selected from polyglyceryl-10 dioleate and polyglyceryl-10 pentaoleate. In some embodiments, the polyglycerol surfactant of the present invention contains polyglyceryl-10 diisostearate, polyglyceryl-6 dicaprate, and polyglyceryl-10 pentaoleate, or contains polyglyceryl-10 diisostearate, polyglyceryl-6 dicaprate, polyglyceryl-10 dioleate, and polyglyceryl-10 pentaoleate. In addition to the characteristics that the surfactant itself should have, the polyglycerol surfactant described herein should also enable the liquid oil-phase cosmetic cleanser to have uniformity, transparency, and stability.

[0059] When contained, the content of polyglyceryl-10 pentaoleate can be 1%-5%, such as 2%-4%, based on the total mass of the liquid oil-phase makeup cleanser. When contained, the content of polyglyceryl-10 dioleate is 4%-10%, such as 5%-8%, based on the total mass of the liquid oil-phase makeup cleanser.

[0060] In some embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser of the present invention contains 3%-10%, preferably 4%-9% of polyglyceryl-10 diisostearate, and 3%-10%, preferably 4%-8% or 4%-6% of polyglyceryl-6 dicaprate, or consists of them.

[0061] In some embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser of the present invention contains 5%-10%, preferably 6%-9% of polyglyceryl-10 diisostearate, and 3%-10%, preferably 3%-6% of polyglyceryl-6 dicaprate, or consists of them.

[0062] In some embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser of the present invention contains 5%-10%, preferably 7%-9% of polyglyceryl-10 diisostearate, 5%-10%, preferably 5%-8% of polyglyceryl-6 dicaprate, 2%-8%, preferably 2%-5% of polyglyceryl-10 pentaoleate, and 5-10%, preferably 6%-9% of polyglyceryl-10 dioleate, or consists of them.

[0063] In some embodiments, based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser of the present invention contains 3%-8%, preferably 3%-6% of polyglyceryl-10 diisostearate, 3%-9%, preferably 3%-7% of polyglyceryl-6 dicaprate, 2%-8%, preferably 2%-5% of polyglyceryl-10 pentaoleate, and 5-10%, preferably 6%-9% of polyglyceryl-10 dioleate, or consists of.

[0064] Herein, the mass of glycerol can be greater than 5% and less than 45% of the total mass of the liquid oil-phase makeup cleanser. When the amount of glycerol added is greater than or equal to 45%, glycerol, polyglycerol surfactants and oils will form a gel state. In a preferred embodiment, the mass of glycerol can be 5%-40% of the total mass of the liquid oil-phase makeup cleanser, or 5%-35%, 5%-30%. In some embodiments, the mass of glycerol can be 5%-25%, 9%-25% or 9%-20% of the total mass of the liquid oil-phase makeup cleanser.

[0065] In some embodiments, the combination of glycerol, polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate has a preferred mass ratio, and the mass of glycerol is 0.6-2 times, such as 0.8-1.8 times, the mass of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate.

[0066] The oils and fats applicable to the present invention may be natural or synthetic oils and fats commonly used in the art, preferably natural oils and fats. The oils and fats are preferably selected from one or more of cetyl ethylhexanoate, coconut oil alcohol-caprylate / caprate, isononyl isononanoate, dicaprylyl carbonate, cetearyl ethylhexanoate or ethylhexyl palmitate. Herein, the mass of the oil and fat may be 50%-85%, preferably 50%-75% of the total weight of the liquid oil-phase makeup cleanser. In some embodiments, the liquid oil-phase makeup cleanser of the present invention contains 50%-82% of cetyl ethylhexanoate.

[0067] The auxiliary agent applicable to the present invention may be an auxiliary agent commonly used in the art, and those skilled in the art may add auxiliary agents according to actual product requirements, such as preservatives, skin conditioners, plant essential oils, plant extracts, etc. Herein, the mass of the auxiliary agent may be less than 5% of the total weight of the liquid oil-phase makeup cleanser, preferably less than 1%.

[0068] In some embodiments, the liquid oil-phase cosmetic cleanser of the present invention comprises the following components:

[0069] Polyglycerol surfactant 10wt%-30wt%,

[0070] Glycerol 5wt%-30wt%,

[0071] Grease 50wt%-85wt%,

[0072] Auxiliary agent 0wt%-5wt%.

[0073] In some embodiments, the liquid oil-phase cosmetic cleanser of the present invention comprises, based on the total weight of the liquid oil-phase cosmetic cleanser, 3.5-5.5% of polyglyceryl-10 diisostearate, 5.5-6.5% of polyglyceryl-6 dicaprate, 8-10% of glycerin and 78-82% of cetyl ethylhexanoate.

[0074] In some embodiments, the liquid oil-phase cosmetic cleanser of the present invention comprises, based on the total weight of the liquid oil-phase cosmetic cleanser, 7.0-8.0% of polyglyceryl-10 diisostearate, 4.5-5.5% of polyglyceryl-6 dicaprate, 15-25% of glycerin and 65-75% of cetyl ethylhexanoate.

[0075] In some embodiments, the liquid oil-phase cosmetic cleanser of the present invention comprises, based on the total weight of the liquid oil-phase cosmetic cleanser, 8.5-9.5% of polyglyceryl-10 diisostearate, 5.5-6.5% of polyglyceryl-6 dicaprate, 2.5-3.5% of polyglyceryl-10 pentaoleate, 6.5-7.5% of polyglyceryl-10 dioleate, 25-30% of glycerin and 45-55% of cetyl ethylhexanoate.

[0076] In some embodiments, the liquid oil-phase makeup cleanser of the present invention comprises, based on the total weight of the liquid oil-phase makeup cleanser, 3.5-4.5% of polyglyceryl-10 diisostearate, 4.5-5.5% of polyglyceryl-6 dicaprate, 2.5-3.5% of polyglyceryl-10 pentaoleate, 6.5-7.5% of polyglyceryl-10 dioleate, 5-15% of glycerin and 68-72% of cetyl ethylhexanoate.

[0077] The present invention also provides a method for preparing the liquid oil-phase cosmetic cleanser as described in any embodiment herein.

[0078] Weigh the polyglycerol surfactant and oil according to the ratio, heat them to 80-90° C., mix them evenly, and form a mixed solution; cool them to 40-50° C., add glycerin while stirring, mix them evenly, and obtain a liquid oil-phase makeup cleanser. In some embodiments, an auxiliary agent may be added after adding glycerin.

[0079] The liquid oil-phase cosmetic cleanser can be mixed evenly using equipment commonly used in the art, such as a blender.

[0080] In some embodiments, the liquid oil-phase makeup cleanser of the present invention can be used to clean makeup.

[0081] In some embodiments, the present invention also provides the use of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate in improving the solubility of glycerol in a cosmetic oil phase, or in improving the uniformity, transparency and stability of a cosmetic oil phase containing more than 5 wt% glycerol. In some embodiments, the oil contained in the oil phase is as described in any embodiment of the present invention. In some embodiments, the cosmetic is a liquid oil-phase cosmetic cleanser as described in any embodiment of the present invention.

[0082] The present invention has the following beneficial effects:

[0083] The liquid oil-phase makeup cleanser of the present invention can still maintain uniformity, stability and transparency under the premise of adding a large amount of glycerin, and the makeup removal effect remains unchanged while the moisturizing degree of the liquid oil-phase makeup cleanser is improved, and a warm feeling can be generated during the use of the product.

[0084] The present invention will be further described below by way of specific examples. It should be understood that these examples are merely illustrative and are not intended to limit the scope of the present invention. The methods and reagents used in the examples, the polyglyceryl-6 dicaprate model is SUNSOFT Q-102-C, the polyglyceryl-10 dioleate model is SUNSOFT Q-172Y-C, the polyglyceryl-10 diisostearate model is SUNSOFT Q-192Y-C, and the glycerol model is MOON K, are conventional methods and reagents in the art unless otherwise specified.

[0085] Liquid oil-phase makeup cleanser uniformity, transparency, and stability testing

[0086] The stability test refers to the national standard GB / T 35914-2018 for the index requirements of type I makeup remover products (makeup remover oil, makeup remover cream): "heat resistance" is (40±1)℃ for 24h, and there is no obvious difference in properties after returning to room temperature compared with before the test, and "cold resistance" is (-8±2)℃ for 24h, and there is no obvious difference in properties after returning to room temperature compared with before the test. Therefore, in this embodiment, the test conditions for 1M stability are that the sample is kept at -18℃, 5℃, 25℃, 42℃, 45℃ and cycle conditions for one month, wherein the cycle conditions are -18℃ to 45℃, and every 48h is a cycle. There is no obvious difference in properties after returning to room temperature compared with before the test, and it is stable. The judgment standard for transparency is: place a paper with fonts or lines behind a transparent cylindrical glass container with a diameter of 5cm containing the sample. If the fonts or lines are clearly visible, it is transparent; if the fonts or lines are blurred, it is turbid. The criterion for judging uniformity is: if the sample does not delaminate after being placed for a long time (at least 30 minutes) and has no obvious difference in properties compared with before the test, it is uniform.

[0087] Heat the oil and polyglycerol surfactant to 85°C and stir evenly, cool to 45°C, slowly add glycerol while stirring and mix evenly. The raw materials, proportions and stability used in Examples 1-4 and Comparative Examples 1-9 are shown in Table 1. The state of the liquid oil phase makeup cleanser after standing is as follows: Figure 1 .

[0088] Table 1: Raw material ratios and stability results of examples and comparative examples

[0089]

[0090]

[0091]

[0092] Compatibility of common oils and fats

[0093] To further explore the compatibility of commonly used oils in the field in the liquid oil-phase makeup cleanser of the present invention, cetearyl ethylhexanoate was used as the oil phase, and the material body temperature showed a bluish system at 85°C, and the transparency was low (borderline turbidity). That is, based on the total mass of the liquid oil-phase makeup cleanser as 100 parts by mass, the components other than the oil and their proportions were: 4.6 parts by mass of polyglyceryl-6 dicaprate, 1.5 parts by mass of polyglyceryl-10 dioleate, 8 parts by mass of polyglyceryl-10 diisostearate, and 15 parts by mass of glycerol; the oils and fats were 70.9 parts by mass.

[0094] Common oil compatibility results such as Figure 2 As shown, isononyl isononanoate, coconut oil alcohol caprylate / caprate, dicaprylyl carbonate, cetearyl ethylhexanoate, cetyl alcohol ethylhexyl ester, ethylhexyl palmitate, etc. can be used to prepare a transparent and uniform material.

[0095] Makeup removal power

[0096] 1. Experimental equipment:

[0097] 1.1 Reagents and Materials

[0098] Dry paper towel, pipette or dropper, liquid oil-phase makeup cleanser of this system, liquid oil-phase makeup cleanser without added glycerin

[0099] 1.2 Experimental instruments

[0100] Dermalab combo dermatoscope

[0101] 2 Experimental methods

[0102] 2.1 Experimental conditions

[0103] Test environment temperature: 22-24°C, humidity 40-60%, and real-time dynamic monitoring.

[0104] 2.2 Experimental procedures

[0105] 2.2.1 Preparation before testing

[0106] Before the test, the subjects need to wash their arms uniformly, wipe off moisture with a clean paper towel and keep them dry, sit quietly in a standard room for at least 20 minutes, expose their forearms, place them in the test state, and keep relaxed. Place the liquid oil-phase makeup cleanser in an oven set at 25°C in advance. The product application area should be randomly distributed on the left and right arms and marked with a 2cm*2cm area to ensure that all product area positions are statistically balanced. Apply mascara, eyeliner and lip tint to the test area and let it stand for 5 minutes.

[0107] Adjust the instrument according to the Dermalab combo instrument instruction manual.

[0108] 2.2.2 Testing

[0109] Drop 0.1mL of liquid oil-phase makeup cleanser into the specified test area, rub it 15 times with the index finger with the same force, add water to emulsify and rub it 10 times with the same force, rinse it with 23℃ water (laboratory water temperature test result: 23℃), then use a tissue to absorb excess water on the arm, and use a dermatoscope to observe the makeup residue to test the makeup removal power.

[0110] The makeup removal ability of the liquid oil-phase makeup cleansing agent of Example 3 and Comparative Example 10 without glycerin was tested. The composition of the liquid oil-phase makeup cleansing agent is shown in Table 2 below, and the schematic diagram before and after makeup removal is shown in Figure 3 .Depend on Figure 3 It can be seen that the makeup remover oil without glycerin has makeup residue after removal, while the liquid oil-phase makeup cleanser with glycerin has almost "no" makeup residue after removal, which proves that the liquid oil-phase makeup cleanser with glycerin has better makeup removal ability. Other embodiments also have the same effect.

[0111] Table 2: Composition and mass fraction (%) of liquid oil-phase makeup cleansing agent

[0112] composition Comparative Example 10 Example 3 Polyglyceryl-6 Dicaprate 6 6 Polyglyceryl-10 dioleate 7 7 Polyglyceryl-10 Diisostearate 9 9 Polyglyceryl-10 Pentaoleate 3 3 glycerin 0 25 Cetyl Ethylhexanoate 75 50

[0113] Skin feel

[0114] 1. Experimental Equipment

[0115] 1.1 Reagents and Materials

[0116] Two groups of materials were prepared. Group A contained only oil and polyglycerol surfactant without adding glycerol component, and group B contained oil, polyglycerol surfactant and glycerol. The mass ratio of the two groups of ingredients is shown in Table 3 below:

[0117] Table 3: Mass ratio of liquid oil-phase makeup cleansing agent in sensory evaluation (unit: %)

[0118] A B Polyglyceryl-10 Diisostearate 8 8 Polyglyceryl-6 Dicaprate 5 5 glycerin 0 15 Cetyl Ethylhexanoate 87 72

[0119] 2. Experimental Methods

[0120] Volunteers were recruited and a blind test was conducted to let the subjects feel the skin feel of groups A and B samples after application. The subjects voted based on several dimensions: likability (preferred skin feel during application), freshness (almost no oily film after washing) and moisturizing (moisturized without feeling tight after washing).

[0121] 3. Experimental results

[0122] The sensory evaluation of the two groups of liquid oil-phase makeup cleansers in terms of liking, refreshing and moisturizing after washing is shown in Table 4. From the results, it can be seen that the subjects prefer the liquid oil-phase makeup cleansers in group B in terms of liking (60%), refreshing (70%) and moisturizing (70%). Therefore, the liquid oil-phase makeup cleansers containing glycerin, oil and polyglycerol surfactants of the present invention can greatly improve the makeup removal product experience.

[0123] Table 4: Sensory evaluation results

[0124] Likeability Freshness Moisture Subject 1 A B B Subject 2 B B B Subject 3 B B B Subject 4 A A A Subject 5 B B B Subject 6 B B A Subject 7 A A B Subject 8 B B B Subject 9 A A B Subject 10 B B A

[0125] Auxiliary agents

[0126] According to Table 5, weigh the polyglycerol surfactant and oil, heat them to 85°C, stir and mix them evenly to form a mixed solution; cool to 45°C, slowly add glycerin while stirring, then add the auxiliary agent (rose essential oil or chamomile extract), and stir well. After standing, a uniform, stable and transparent liquid oil-phase makeup cleanser is formed.

[0127] Table 5: Raw material ratio and its stability results

[0128]

[0129]

Claims

1. A liquid oil-phase makeup cleanser, characterized in that: Based on the total mass of the liquid oil-phase makeup cleanser, the liquid oil-phase makeup cleanser comprises: 10%-25% polyglycerol surfactant, 5%-25% glycerin, 50-85% fat, and 0-2% adjuvant; Wherein, the polyglycerol surfactant is composed of 4%-9% of polyglycerol-10 diisostearate and 4%-6% of polyglycerol-6 dicaprate, or is composed of 4%-9% of polyglycerol-10 diisostearate, 5%-6% of polyglycerol-6 dicaprate, 3%-5% of polyglycerol-10 pentaoleate and 5%-7% of polyglycerol-10 dioleate; The oil is selected from one or more of coconut oil alcohol-caprylate / caprate, isononyl isononanoate, dicaprylyl carbonate, cetyl alcohol ethylhexanoate, cetearyl alcohol ethylhexanoate or ethylhexyl palmitate, The auxiliary agent is selected from one or more of preservatives, skin conditioners, plant essential oils and plant extracts.

2. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: In the liquid oil-phase makeup cleanser, based on the total mass of the liquid oil-phase makeup cleanser, the mass of the polyglycerol surfactant is 10%-20% of the total mass of the liquid oil-phase makeup cleanser.

3. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: In the liquid oil-phase makeup cleanser, based on the total mass of the liquid oil-phase makeup cleanser, the mass of the polyglycerol surfactant is 12%-20% of the total mass of the liquid oil-phase makeup cleanser.

4. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: In the liquid oil-phase cosmetic cleanser, the mass ratio of the polyglyceryl-10 diisostearate to the polyglyceryl-6 dicaprate is 2:3-3:

2.

5. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: Based on the total mass of the liquid oil-phase cosmetic cleanser, the polyglycerol surfactant in the liquid oil-phase cosmetic cleanser contains 7%-9% of polyglyceryl-10 diisostearate.

6. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: The mass of the glycerin is 9%-25% of the total mass of the liquid oil-phase makeup cleanser.

7. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: The mass of the glycerin is 9%-20% of the total mass of the liquid oil-phase makeup cleanser.

8. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: In the liquid oil-phase cosmetic cleanser, the mass of glycerin is 0.6-2 times the sum of the masses of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate.

9. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: In the liquid oil-phase cosmetic cleanser, the mass of glycerin is 0.8-1.8 times the sum of the masses of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate.

10. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: The mass of the oil is 50%-75% of the total mass of the liquid oil-phase makeup cleanser.

11. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: The weight of the auxiliary agent is less than 1% of the total weight of the liquid oil-phase makeup cleanser.

12. The liquid oil-phase makeup cleanser according to claim 1, characterized in that: Based on the total weight of the liquid oil-phase makeup cleanser, the liquid oil-phase makeup cleanser comprises: 7.0-8.0% of polyglyceryl-10 diisostearate, 4.5-5.5% of polyglyceryl-6 dicaprate, 15-25% of glycerin and 65-75% of cetyl ethylhexanoate.

13. Use of polyglyceryl-10 diisostearate and polyglyceryl-6 dicaprate for improving the solubility of glycerol in a cosmetic oil phase, or for improving the uniformity, transparency and stability of a cosmetic oil phase containing 5 wt % to 25 wt % of glycerol, wherein the cosmetic is the liquid oil phase cosmetic cleanser according to any one of claims 1 to 12.

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