Stable cleansing composition as well as preparation method and application thereof

Abstract

The invention provides a stable face cleaning composition as well as a preparation method and application thereof, and relates to the technical field of cosmetics. The face cleaning composition disclosed by the invention is prepared from the following components: 27 to 43 parts of polyhydroxystearic acid, 20 to 30 parts of jojoba ester, 8 to 18 parts of sunflower seed wax, 10 to 20 parts of tribehenin, 0.6 to 1.5 parts of PEG-8 beewax, 2.5 to 3.4 parts of beewax and 7 to 15 parts of polyglycerol. All the components are synergistically compounded, the obtained face cleaning composition is applied to preparation of cosmetics and has stable interlayer spacing of an alpha-liquid crystal layered structure, and the stability of the cosmetics is remarkably improved; the face cleaning composition can obviously improve the high-temperature stability of cosmetics.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a stable facial cleansing composition, its preparation method, and its application. Background Technology

[0002] Beeswax, a natural wax component, contains fatty acids, esters, and hydrocarbons. On the skin's surface, beeswax forms a breathable protective barrier, blocking environmental irritants without clogging pores, making it suitable for sensitive and acne-prone skin. Beeswax also moisturizes and softens the skin, reducing moisture loss and improving elasticity. Its anti-inflammatory and antibacterial properties stabilize formulations and extend product shelf life. Beeswax, along with other types of waxes, has become a core ingredient in many cosmetics such as mascara, lipstick, face cream, and cleanser, offering both emulsification and barrier protection.

[0003] Many existing cosmetic products with high stability use beeswax. For example, Chinese invention patent CN120694896A discloses an oil-in-water emulsion and a makeup product containing it. The oil-in-water emulsion comprises, by weight, 0.25-50.00 parts of an aqueous phase, 0.45-80.00 parts of an oil phase, 0.025-5.00 parts of an emulsifier, 1 part of sterols and / or sterol derivatives, 0.01-30.0 parts of powder, and 0-3 parts of a polymer. The aqueous phase also contains a chelating agent to improve the stability of the system. The oil phase also includes non-volatile oils, including but not limited to triterpenoids, beeswax, and jojoba ester wax.

[0004] Chinese invention patent CN101005822A discloses an oil-based cosmetic. The cosmetic base contains: dextrin fatty acid esters, sucrose fatty acid esters with an average degree of substitution of 3-8, waxes, and a film-forming agent. In this cosmetic, if the weight proportions of the dextrin fatty acid esters and the sucrose fatty acid esters with an average degree of substitution of 3-8 are unreasonable, the stability will be reduced. The wax component in this patent can be any wax component in the art, not limited to paraffin wax, microcrystalline wax, polyethylene wax, carnauba wax, beeswax, wood wax, or synthetic waxes. However, in previous research, those skilled in the art have found that different types of wax raw materials have a certain impact on the stability of cosmetics, and in the existing technology, there are few studies on how selecting specific types of wax raw materials can significantly improve the stability of cosmetics.

[0005] However, it's important to note that the natural properties of beeswax also present inherent limitations: beeswax has a low melting point and is prone to softening or even melting at temperatures above 30°C, leading to changes in product texture. This characteristic is a key factor restricting the high-temperature stability of beeswax-containing cosmetics. In emulsified formulations, most emulsification systems rely on a single HLB-value emulsifier or simple compounding. At elevated temperatures, the mechanical strength of the interfacial film decreases, making it impossible to maintain a stable dispersion of the dispersed phase particles, resulting in increased emulsion particle size and demulsification. Simultaneously, high temperatures accelerate fatty acid hydrolysis and rancidity, further disrupting the emulsion balance and potentially causing degradation of active ingredients, leading to a loss of efficacy. Existing formulations often focus on the function of a single ingredient, neglecting the synergistic stabilizing effect of beeswax with other components at high temperatures, resulting in a "single-component stabilization" rather than a "synergistic stabilization" formulation limitation.

[0006] The aforementioned problems with existing technologies lead to frequent melting, delamination, cracking, and decreased efficacy of beeswax-containing cosmetics under high-temperature conditions such as summer storage and outdoor use. Furthermore, the microscopic interlayer spacing of beeswax-containing cosmetics is relatively small, affecting the quality of the products. Therefore, there is a need to develop a cosmetic composition that combines the natural advantages of beeswax to improve the high-temperature stability of cosmetics. Summary of the Invention

[0007] This invention addresses the problems existing in the prior art by providing a stable facial cleansing composition, its preparation method, and its application. The composition is obtained by compounding hydroxystearic acid, jojoba esters, sunflower seed wax, triterpenoids, PEG-8 beeswax, beeswax, and polyglycerol. When applied to cosmetics, this cleansing composition exhibits a stable interlayer spacing of an α-liquid crystal layered structure, significantly improving the stability of the cosmetic. Furthermore, the facial cleansing composition of this invention, when applied to the preparation of cosmetics, can significantly improve the high-temperature stability of the cosmetics.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: First, the present invention provides a stable facial cleansing composition, which, by weight, comprises the following components: 27-43 parts polyhydroxystearic acid, 20-30 parts jojoba esters, 8-18 parts sunflower seed wax, 10-20 parts sanshanyu extract, 0.6-1.5 parts PEG-8 beeswax, 2.5-3.4 parts beeswax, and 7-15 parts polyglycerol.

[0009] Preferably, the facial cleansing composition comprises, by weight, the following components: 30-40 parts polyhydroxystearic acid, 23-28 parts jojoba esters, 10-15 parts sunflower seed wax, 12-18 parts trismocarboxylic acid, 0.8-1.2 parts PEG-8 beeswax, 2.8-3.2 parts beeswax, and 8-12 parts polyglycerol.

[0010] More preferably, the facial cleansing composition comprises, by weight, the following components: 35 parts polyhydroxystearic acid, 25 parts jojoba esters, 12 parts sunflower seed wax, 15 parts trismocarboxylic acid, 1 part PEG-8 beeswax, 3 parts beeswax and 10 parts polyglycerol.

[0011] Preferably, the polyglycerol is selected from at least one of polyglycerol 3, polyglycerol 6, and polyglycerol 10.

[0012] Furthermore, the present invention provides a method for preparing the above-mentioned facial cleansing composition, comprising the steps of: mixing the components in the prescribed amounts, stirring and heating to melt, cooling, and obtaining the facial cleansing composition.

[0013] Preferably, the heating temperature is 60-75°C; more preferably, the heating temperature is 65-70°C.

[0014] Preferably, there is no limit to the stirring speed, as long as it ensures that the mixture does not stick to the bottom or burn.

[0015] Preferably, the cooling is performed to room temperature.

[0016] Furthermore, the present invention provides the application of the above-mentioned cleansing composition in the preparation of highly stable cosmetics.

[0017] Finally, the present invention provides a highly stable cosmetic, comprising the above-described facial cleansing composition.

[0018] Preferably, the cosmetic also includes components: commonly used excipients in the cosmetic field, including but not limited to moisturizers, emulsifiers, thickeners, antioxidants, whitening agents, and skin conditioning agents.

[0019] Preferably, the cosmetic is not limited to lotions, ointments, or creams.

[0020] Preferably, the amount of the facial cleansing composition added to the cosmetic is 1%-6%; more preferably, the amount of the facial cleansing composition added to the cosmetic is 3%.

[0021] Under the conditions of the addition amount described in this invention, the facial cleansing compositions of this invention can all achieve improved cosmetic stability.

[0022] By way of example, in some specific embodiments of the present invention, the excipients are not limited to water, potassium hydroxide, disodium EDTA, myristic acid, palmitic acid, stearic acid, glycerin, cocoamide MEA, caprylyl glycol and phenoxyethanol.

[0023] For example, in some specific embodiments of the present invention, the ingredients of the cosmetic product, by weight percentage, include: 1-6% cleansing composition, 4-7% potassium hydroxide, 0.05-0.2% disodium EDTA, 5-15% myristic acid, 5-15% palmitic acid, 5-15% stearic acid, 10-30% glycerin, 0.5-2% cocoamide MEA, 0.1-0.3% caprylyl glycol, 0.5-1% phenoxyethanol, and the balance being water.

[0024] For example, in some specific embodiments of the present invention, the ingredients of the cosmetic product, by weight percentage, include: 3% cleansing composition, 5% potassium hydroxide, 0.1% disodium EDTA, 10% myristic acid, 10% palmitic acid, 10% stearic acid, 20% glycerin, 1% cocoamide MEA, 0.2% caprylyl glycol, 0.7% phenoxyethanol and 40% water.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. In the facial cleansing composition of the present invention, sunflower seed wax, PEG-8 beeswax and beeswax interact to increase the stability of the mesh structure and promote the film-forming and emulsifying effects of the cosmetic product.

[0026] 2. The present invention combines hydroxystearic acid, jojoba esters, sunflower seed wax, trismocarboxylic acid, PEG-8 beeswax, beeswax and polyglycerol to obtain a facial cleansing composition that is applied to cosmetics, resulting in cosmetics with a stable interlayer spacing of α-liquid crystal layered structure, and the stability is significantly improved.

[0027] 3. In the preparation process of the facial cleansing composition of the present invention, polyglycerol is used as a solvent component to provide hydroxyl groups that interact with other components, thereby improving the structural stability of the cosmetic. Attached Figure Description

[0028] Figure 1 The image shows the appearance of the cosmetic prepared from the cleansing composition of the example after being placed at 45°C for 24 hours.

[0029] Figure 2 This is a diagram showing the apparent state of a cosmetic prepared from a comparative cleansing composition after being placed at 45°C for 24 hours. Detailed Implementation

[0030] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0031] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] The present invention will be further described below by way of specific embodiments. Unless otherwise specified, all chemical reagents used in the embodiments of the present invention are obtained through conventional commercial means.

[0033] In the specific implementation of this invention, the sources of the main raw materials used are shown in Table 1. The sources of these raw materials are merely exemplary, and products from different manufacturers do not have a significant impact on the effect.

[0034] Table 1

[0035] Example 1 A stable facial cleansing composition comprising, by weight: 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 12 parts sunflower seed wax, 15 parts trismocarboxylic acid, 1 part PEG-8 beeswax, 3 parts beeswax and 10 parts polyglycerol 3.

[0036] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0037] Example 2 A stable facial cleansing composition comprising, by weight: 30 parts polyhydroxystearic acid, 23 parts jojoba esters, 10 parts sunflower seed wax, 18 parts sanshin extract, 0.8 parts PEG-8 beeswax, 2.8 parts beeswax and 12 parts polyglycerol 3.

[0038] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0039] Example 3 A stable facial cleansing composition comprising, by weight: 40 parts polyhydroxystearic acid, 28 parts jojoba esters, 15 parts sunflower seed wax, 12 parts tri-yam extract, 1.2 parts PEG-8 beeswax, 3.2 parts beeswax and 8 parts polyglycerol 3.

[0040] Mix the above components according to the formula, stir at 60°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0041] Example 4 A stable facial cleansing composition comprising, by weight: 27 parts polyhydroxystearic acid, 20 parts jojoba esters, 8 parts sunflower seed wax, 20 parts tri-yam extract, 0.6 parts PEG-8 beeswax, 2.5 parts beeswax and 15 parts polyglycerol 6.

[0042] Mix the above components according to the formula, stir at 65°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0043] Example 5 A stable facial cleansing composition comprising, by weight: 43 parts polyhydroxystearic acid, 30 parts jojoba esters, 18 parts sunflower seed wax, 10 parts sanshin extract, 1.5 parts PEG-8 beeswax, 3.4 parts beeswax and 7 parts polyglycerol 10.

[0044] Mix the above components according to the formula, stir at 75°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0045] Comparative Example 1 Unlike Example 1, PEG-8 beeswax was replaced with regular beeswax.

[0046] The facial cleansing composition comprises, by weight, 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 12 parts sunflower seed wax, 15 parts sanshin extract, 4 parts beeswax and 10 parts polyglycerol 3.

[0047] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0048] Comparative Example 2 Unlike Example 1, the cleansing composition does not contain the ingredients sunflower seed wax, PEG-8 beeswax, and beeswax.

[0049] The facial cleansing composition comprises, by weight, 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 15 parts trisine extract and 10 parts polyglycerol 3.

[0050] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0051] Comparative Example 3 Unlike Example 1, the cleansing composition does not contain the ingredients sunflower seed wax and PEG-8 beeswax.

[0052] The facial cleansing composition comprises, by weight, 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 15 parts trismocyanin, 3 parts beeswax and 10 parts polyglycerol 3.

[0053] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0054] Comparative Example 4 Unlike Example 1, the facial cleansing composition includes ingredients found in prior art CN105250154A: propylene carbonate and sunflower seed oil.

[0055] A stable facial cleansing composition comprising, by weight: 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 12 parts sunflower seed wax, 15 parts sanshin extract, 1 part PEG-8 beeswax, 3 parts beeswax, 10 parts polyglycerol 3, 35 parts propylene carbonate, and 35 parts sunflower seed oil.

[0056] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0057] Comparative Example 5 Unlike Example 1, PEG-8 beeswax was replaced with polyethylene wax.

[0058] The facial cleansing composition comprises, by weight, 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 12 parts sunflower seed wax, 15 parts tri-yam extract, 1 part polyethylene wax, 3 parts beeswax and 10 parts polyglycerol 3.

[0059] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0060] Comparative Example 6 Unlike Example 1, polyglycerol 3 was replaced with polyglycerol-2 diisostearate.

[0061] The facial cleansing composition comprises, by weight, 35 parts polyhydroxystearic acid, 24 parts jojoba esters, 12 parts sunflower seed wax, 15 parts trismocarboxylic acid, 1 part PEG-8 beeswax, 3 parts beeswax and 10 parts polyglycerol-2 diisostearate.

[0062] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0063] Comparative Example 7 Unlike Example 1, the weight ratio of the components in the facial cleansing composition is different.

[0064] The composition comprises, by weight, 15 parts polyhydroxystearic acid, 24 parts jojoba esters, 6 parts sunflower seed wax, 35 parts trismocarboxylic acid, 8 parts PEG-8 beeswax, 2 parts beeswax and 10 parts polyglycerol.

[0065] Mix the above components according to the formula, stir at 70°C until melted, mix evenly, and cool to room temperature to obtain the facial cleansing composition.

[0066] The cleansing compositions prepared in each embodiment and comparative example were used in the preparation of cosmetics at an addition amount of 3%. The cosmetic composition consisted of: 3% cleansing composition, 40% water, 5% potassium hydroxide, 0.1% disodium EDTA, 10% myristic acid, 10% palmitic acid, 10% stearic acid, 20% glycerin, 1% cocoamide MEA, 0.2% caprylyl glycol, and 0.7% phenoxyethanol. All components were mixed thoroughly to obtain the cleansing cosmetic.

[0067] Test Example 1: Microstructure Detection Testing instrument: Two-dimensional multi-functional small-angle X-ray scattering instrument (Xenocs, France, Xeuss 3.0HR).

[0068] The microstructure (interlayer spacing) of the prepared cosmetics was detected using a two-dimensional multi-functional small-angle X-ray scattering instrument.

[0069] High-brightness micro-focal spot fixed target light source, target material Cu, optical tube power 30W; target focal spot diameter ≤45 μm, maximum luminous flux at the sample ≥4108 phs / s; detector type: solid-state silicon array two-dimensional single-photon counting detector, utilizing solid silicon (material thickness ≥450 μm) to directly convert X-rays; small-angle detector can automatically collect >400cm at any position in the optical path (within the range of 80mm-1800mm from the sample). 2 Complete, original two-dimensional scattering spectra; limiting angles or q ranges for fully automated, continuous acquisition by a small-angle signal detector: 2θ_min ≤ 0.03°, q_min ≤ 0.02nm. -1 ,2θ_max≥70°, q_max≥45nm -1 .

[0070] The interlayer spacing (nm) of the facial cleansing compositions prepared in each example and comparative example was measured. Each cosmetic was sealed and placed at 45°C for 24 hours. After being removed, the interlayer spacing (nm) was measured again. The results are shown in Table 2.

[0071] Table 2

[0072] As shown in Table 2, the cosmetic prepared using the cleansing composition of the present invention exhibits a multilayer structure with a higher interlayer spacing compared to the comparative example. This higher interlayer spacing allows for the encapsulation and stabilization of more water molecules, active ingredients, or oil droplets, preventing their aggregation or separation and thus enhancing physical stability. The interaction between sunflower seed wax, PEG-8 beeswax, and beeswax improves the structural robustness of the cleansing composition, preventing oil-water separation. The cosmetic prepared using the cleansing composition of the present invention maintains high stability even at higher temperatures, with no significant change in interlayer spacing. In contrast, the comparative example, after altering the components or proportions, experienced water loss, oil-water separation, and a significant decrease in interlayer spacing, resulting in a fragile structure.

[0073] Test Example 2: Apparent State Detection for Storage Stability For the cosmetic product in Test Example 1, 10 trained testers observed and evaluated its appearance.

[0074] The evaluation criteria for each state are shown in Table 3.

[0075] Table 3

[0076] The appearance of each cosmetic product was scored, and the average score from 10 testers is shown in Table 4. The appearance of the cosmetic product prepared from the cleansing composition of the example after being placed at 45°C for 24 hours is shown in the figure. Figure 1 The appearance of the cosmetic prepared from the comparative cleansing composition after being placed at 45°C for 24 hours is shown in the figure. Figure 2 .

[0077] Table 4

[0078] As shown in Table 4, the cosmetic prepared from the cleansing composition of the present invention has an initial appearance score and an average score of 5 after being placed at 45°C for 24 hours. The structure is stable after high-temperature placement, the texture is fine and uniform, and the stability is high. In contrast, the cosmetic prepared from the comparative cleansing composition has a better initial appearance, but after being placed at 45°C for 24 hours, the structure collapses, the texture hardens, and even layering and water seepage occur. This indicates that the cleansing composition prepared using specific ingredients and proportions of the present invention, when applied to cosmetics, has the technical effect of improving the stability of cosmetics.

[0079] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A stable facial cleansing composition, characterized in that, By weight, it consists of the following components: 27-43 parts polyhydroxystearic acid, 20-30 parts jojoba esters, 8-18 parts sunflower seed wax, 10-20 parts sanshanyu extract, 0.6-1.5 parts PEG-8 beeswax, 2.5-3.4 parts beeswax and 7-15 parts polyglycerol.

2. The facial cleansing composition according to claim 1, characterized in that, By weight, it consists of the following components: 30-40 parts polyhydroxystearic acid, 23-28 parts jojoba esters, 10-15 parts sunflower seed wax, 12-18 parts sanshanyu extract, 0.8-1.2 parts PEG-8 beeswax, 2.8-3.2 parts beeswax and 8-12 parts polyglycerol.

3. The facial cleansing composition according to claim 2, characterized in that, By weight, it consists of the following components: 35 parts polyhydroxystearic acid, 25 parts jojoba esters, 12 parts sunflower seed wax, 15 parts sanshin extract, 1 part PEG-8 beeswax, 3 parts beeswax and 10 parts polyglycerol.

4. The facial cleansing composition according to claim 3, characterized in that, The polyglycerol is selected from at least one of polyglycerol 3, polyglycerol 6, and polyglycerol 10.

5. A method for preparing the facial cleansing composition according to any one of claims 1-4, characterized in that, The process includes the following steps: mixing the components in the prescribed amounts, stirring and heating to melt, cooling, and obtaining the composition.

6. The preparation method according to claim 5, characterized in that, The heating temperature is 60-75℃.

7. The preparation method according to claim 5, characterized in that, The cooling process involves cooling the material to room temperature.

8. The use of the facial cleansing composition according to any one of claims 1-4 in the preparation of highly stable cosmetics.

9. A highly stable cosmetic product, characterized in that, The composition includes the facial cleansing composition according to any one of claims 1-4.

10. The cosmetic product according to claim 9, characterized in that, It also includes ingredients: excipients commonly used in the cosmetics industry.

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