Lipstick and preparation method therefor

Abstract

A lipstick and a preparation method therefor. The lipstick comprises, by mass percentage, 51%-78% of an oil phase; 20%-40% of an aqueous phase; 0-5% of an active substance; 1%-12% of an emulsifying composition; and 1%-5% of an emulsifying-enhancing composition. The emulsifying composition comprises lauryl PEG-9 polydimethylsiloxyethyl dimethicone, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid. The emulsifying-enhancing composition comprises a Rhus succedanea fruit wax and sorbitan olivate. The lipstick has a high water phase content, so that this lipstick offers excellent hydrating feel and moisture retention property, along with a uniform and fine texture.

Description

Lipstick and its preparation method

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202411928992.4, filed on December 24, 2024, entitled “Lipstick and Method of Preparation thereof,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of cosmetic technology, specifically relating to a lipstick and its preparation method. Background Technology

[0004] As a type of lip cosmetic, lipstick's main function is to change the color of the lips and make the overall makeup look more vivid and vibrant by emphasizing or changing the contour of the lips.

[0005] Traditional lipstick formulas mainly include colorants, fillers, waxes, oils, pearlescent agents, fragrances, and preservatives. During the manufacturing process, oils and waxes can mix well, but oils are immiscible with water, and waxes are not water-soluble. Adding a large amount of water to a heated lipstick mixture will cause layering and sedimentation, making it impossible to produce a uniform lipstick. Therefore, traditional lipstick formulas are usually anhydrous or contain only a small amount of water, resulting in a lack of hydration. Summary of the Invention

[0006] To address the aforementioned problems, this application provides a lipstick and a method for preparing it. The lipstick has a high water content, thus providing a better moisturizing feel.

[0007] The first aspect of this application provides a lipstick, comprising, by weight percentage: an oil phase: 51%–78%; an aqueous phase: 20%–40%; an active ingredient: 0%–5%; an emulsifying composition: 1%–12%; and an emulsifying synergist composition: 1%–5%.

[0008] in,

[0009] The emulsifying composition includes lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid;

[0010] The emulsifying and enhancing composition includes succinate wax and sorbitan olive oil ester.

[0011] The lipstick of this application comprises an emulsifying composition consisting of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid, and an emulsifying synergistic composition consisting of urushiol wax and sorbitan olive oil ester. Not intended to be limited by any theory or explanation, on the one hand, the emulsifying composition has good compatibility with the waxes in the oil phase, allowing the waxes to maintain their molding effect and a certain degree of hardness even when present in the dispersed phase. On the other hand, the emulsifier synergistic composition can further enhance the emulsification efficiency of the emulsifying composition, resulting in smaller and more uniform micelle particle sizes during emulsification, while simultaneously reducing the surface energy of the system and stabilizing the emulsion system. This reduces the risk of emulsion system stratification, aggregation, or demulsification. Through the synergistic effect of the aforementioned emulsifying composition and emulsifying synergistic composition, the lipstick formulation provided by this application can increase the upper limit of the aqueous phase content in the emulsion system while ensuring product quality, thereby allowing the lipstick to have a higher aqueous phase content. Therefore, the water phase content in the lipstick formula provided in this application can be increased to over 20%, or even reach 40%. As a result, the lipstick of this application can have both a better texture and appearance, and has excellent water-like feel and moisturizing properties.

[0012] In any embodiment of this application, the lipstick comprises, by weight percentage: oil phase: 51%–61%; aqueous phase: 30%–40%; active ingredient: 1%–5%; emulsifying composition: 4.5%–7.5%; and emulsifying synergist composition: 1.5%–2%.

[0013] In any embodiment of this application, the mass ratio of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate and polyhydroxystearic acid in the emulsifying composition is 1:(0.25-10):(0.25-12):(0.1-3).

[0014] In any embodiment of this application, the mass ratio of senna wax and sorbitan olive oil ester in the emulsifying and enhancing composition is 1:(0.5-10).

[0015] In any embodiment of this application, the mass ratio of senna wax and sorbitan olive oil ester in the emulsifying and enhancing composition is 1:(1.8-2.2).

[0016] In any embodiment of this application, the oil phase includes hydrogenated polyisobutylene, tocopherol, ethylhexylglycerin, polydimethylsiloxane, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, kaolin, trimethylsiloxysilicate, synthetic wax, diethylhexyl carbonate, isododecane, glyceryl behenate / eicosanoate, distearate dimethylammonium lithium montmorillonite, propylene glycol carbonate polyglycerol-3 oleate, caprylic / capric triglyceride, polyhydroxystearic acid, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, jojoba esters, polyglycerol-2 triisostearate, triethoxyoctylsilane, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, HDI / trimethylolhexyl lactone crosspolymer, silica, lecithin, isopropyl myristate, ethylhexyl palmitate, isostearic acid, and dimethylsilylated silica, CI 77891, CI One or a combination of 73360 and CI 77499.

[0017] In any embodiment of this application, the aqueous phase includes one or a combination of several of the following: deionized water, hydroxyethyl urea, 1,2-hexanediol, 1,2-pentanediol, p-hydroxyacetophenone, and sodium chloride.

[0018] In any embodiment of this application, the active ingredient includes one or a combination of several of the following: Myrothamnus flabellifolia leaf / stem extract, acetylated sodium hyaluronate, sodium hyaluronate, sodium hyaluronate crosspolymer, hydrolyzed sodium hyaluronate, peony seed oil, peony root extract, squalane, aloe vera leaf juice, and collagen.

[0019] A second aspect of this application provides a method for preparing the lipstick of the first aspect, comprising:

[0020] The preparation of phase A includes mixing the oil phase with the emulsifying composition and the emulsifying synergist composition at an emulsification temperature to obtain phase A;

[0021] The preparation of phase B includes heating the aqueous phase to the emulsification temperature to obtain phase B;

[0022] The preparation of the mixture includes adding phase B to phase A, stirring at 3000 rpm to 7500 rpm for 5 min to 20 min, and cooling to 40℃ to 60℃ to obtain the mixture;

[0023] The preparation of lipstick involves mixing active ingredients with a mixture until homogeneous, and then cooling the mixture to obtain the lipstick.

[0024] In any embodiment of this application, the emulsification temperature is 75°C to 85°C. Detailed Implementation

[0025] To make the purpose, technical solution, and beneficial technical effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the embodiments described in this specification are merely for explaining this application and are not intended to limit it.

[0026] For simplicity, this application only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly stated; and any lower limit can be combined with other lower limits to form a range not explicitly stated, just as any upper limit can be combined with any other upper limit to form a range not explicitly stated. Furthermore, although not explicitly stated, every point or individual value between the endpoints of the range is included within that range. Therefore, each point or individual value can be used as its own lower or upper limit and combined with any other point or individual value or with other lower or upper limits to form a range not explicitly stated.

[0027] In the description of this application, it should be noted that, unless otherwise stated, "above" and "below" include the stated number, and "multiple" in "one or more" means two or more.

[0028] The foregoing description of this application is not intended to describe every disclosed implementation or method. Instead, the following description provides more specific examples of exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments that can be used in various combinations. The examples listed are representative only and should not be construed as exhaustive.

[0029] As described in the background section, traditional lipsticks typically contain waxes and oils as their main ingredients, resulting in a relatively dry texture and a lack of hydration.

[0030] In view of this, the inventor, through in-depth research and extensive experimentation, has provided a lipstick and a method for its preparation.

[0031] The first aspect of this application provides a lipstick, comprising, by weight percentage: an oil phase: 51% to 78%; an aqueous phase: 20% to 40%; an active ingredient: 0% to 5%; an emulsifying composition: 1% to 12%; and an emulsifying synergist composition: 1% to 5%.

[0032] The emulsifying composition includes lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid. The emulsifying synergistic composition includes senna wax and sorbitan olive oil ester.

[0033] Understandably, in the embodiments of this application, the oil phase and active ingredients may include various conventional oil phase components and active ingredient components suitable for lipsticks. For example, the oil phase may include, but is not limited to, waxes, oils, and other additives or auxiliaries. The active ingredients may include substances with specific biological or chemical activities, such as, but not limited to, artificial / natural biological extracts, moisturizers, or other active agents.

[0034] To address the lack of hydration in lipsticks, the inventors abandoned the traditional notion that "excessive water content in lipsticks inevitably leads to instability in the formula." Instead, they attempted to increase the water phase by introducing an emulsification system into the lipstick formula to enhance its hydration. However, during the research and development process, they discovered that as the amount of water added increased, emulsification became more severe. This resulted in wax layering and uneven texture during lipstick preparation, leading to defects such as the lipstick failing to form a smooth stick shape, color banding, pitting, and a rough, unrefined texture. To ensure product quality, under conventional emulsification systems, the maximum amount of water added can only reach about 15%, which has a very limited effect on improving the lipstick's hydration.

[0035] Further research by the inventors has resulted in the lipstick described in this application. The lipstick formulation comprises an emulsifying composition consisting of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid, and an emulsifying synergistic composition consisting of urushiol wax and sorbitan olive oil ester. Not intended to be limited by any theory or explanation, the emulsifying composition exhibits good compatibility with the waxes in the oil phase, allowing the waxes to maintain their molding effect and a certain degree of hardness even when present in the dispersed phase. Furthermore, the emulsifier synergistic composition further enhances the emulsification efficiency of the emulsifying composition, resulting in smaller and more uniform micelle particle sizes during emulsification, while simultaneously reducing the surface energy of the system and stabilizing the emulsion system. This reduces the risk of emulsion system stratification, aggregation, or demulsification. The lipstick formulation provided in this application, through the synergistic effect of the aforementioned emulsifying composition and emulsifier synergistic composition, can increase the upper limit of the aqueous phase content in the emulsion system while ensuring product quality, thereby allowing the lipstick to have a higher aqueous phase content. Therefore, the water phase content in the lipstick formula provided in this application can be increased to over 20%, or even reach 40%. As a result, the lipstick of this application can have both a better texture and appearance, and has excellent water-like feel and moisturizing properties.

[0036] In some embodiments, the lipstick may contain, by weight percentage: oil phase: 51%–61%; aqueous phase: 30%–40%; active ingredient: 1%–5%; emulsifying composition: 4.5%–7.5%; and emulsifying synergist composition: 1.5%–2%.

[0037] In some embodiments, the mass ratio of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid in the emulsified composition may be 1:(0.25-10):(0.25-12):(0.1-3).

[0038] For example, the mass ratio of lauryl PEG-9 polydimethylsiloxane to caprylic / capric triglyceride can be 1:0.25, 1:0.5, 1:1, 1:2, 1:5, 1:8, 1:10, or within any two of the above ratios.

[0039] For example, the mass ratio of lauryl PEG-9 polydimethylsiloxane to polyglycerol-3 oleate can be 1:0.25, 1:0.5, 1:1, 1:2, 1:5, 1:8, 1:10, 1:12, or within any two of the above ratios.

[0040] For example, the mass ratio of lauryl PEG-9 polydimethylsiloxane to polyhydroxystearic acid can be 1:0.1, 1:0.3, 1:0.5, 1:1, 1:2, 1:3, or within any two of the above ratios.

[0041] Not intended to be limited by any theory or explanation, when the mass ratio of each component in the emulsion composition is within the aforementioned suitable range, it is beneficial to form a stable emulsion aqueous phase during lipstick preparation, reducing the risk of emulsion breakdown. This reduces the risk of liquid separation in the emulsion system, thus facilitating the formation of a smooth and flat solid after cooling, resulting in a better texture and appearance for the lipstick.

[0042] In some embodiments, the mass ratio of senna wax and sorbitan olive oil ester in the emulsifying and enhancing composition can be 1:(0.5 to 10), for example, 1:0.5, 1:1, 1:2, 1:3, 1:5, 1:8, 1:10, or within any two of the above ratios.

[0043] Preferably, in some embodiments, the mass ratio of senna wax and sorbitan olive oil ester in the emulsifying and enhancing composition can be 1:(1.8 to 2.2), for example, it can be 1:0.5, 1:1, 1:2, 1:3, 1:5, 1:8, 1:10, or within any two of the above ratios.

[0044] Not intended to be limited by any theory or explanation, when the mass ratio of each component in the emulsifying and enhancing composition is within the aforementioned suitable range, a higher water content in the emulsion system can be allowed, provided the emulsion aqueous phase remains stable. This allows the finished lipstick to have a higher water content while maintaining a more uniform and delicate texture. Consequently, this further enhances the lipstick's hydration and skin feel.

[0045] In some embodiments, the oil phase may include hydrogenated polyisobutylene, tocopherol (vitamin E), ethylhexylglycerin, polydimethylsiloxane, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, kaolin, trimethylsiloxysilicate, synthetic wax, diethylhexyl carbonate, isododecane, glyceryl behenate / eicosanoate, distearate dimethylammonium lithium montmorillonite, propylene glycol carbonate polyglycerol-3 oleate, caprylic / capric triglyceride, polyhydroxystearic acid, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, jojoba esters, polyglycerol-2 triisostearate, triethoxyoctylsilane, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, HDI / trimethylolhexyl lactone crosspolymer, silica, lecithin, isopropyl myristate, ethylhexyl palmitate, isostearic acid, and dimethylsilylated silica, CI 77891, CI One or a combination of 73360 and CI 77499.

[0046] It is understandable that those skilled in the art can select appropriate oil phase components and their contents according to the needs of the product.

[0047] In some embodiments, the aqueous phase may include one or a combination of several of the following: deionized water, hydroxyethyl urea, 1,2-hexanediol, 1,2-pentanediol, p-hydroxyacetophenone, and sodium chloride.

[0048] It is understood that those skilled in the art can select appropriate oil phase components and their contents according to the needs of the product. For example, based on the total mass of the aqueous phase as 100%, the aqueous phase may include 45% to 70% water, 0% to 25% Aloe barbadensis leaf juice, 3% to 15% glycerol, 2% to 4.2% 1,2-hexanediol, 2.8% to 7% hydroxyethyl urea, 2.8% to 8.4% butylene glycol, 0% to 1.5% 1,2-pentanediol, 0% to 2.8% p-hydroxyacetophenone, and 0% to 3% sodium chloride, or a combination of several of these components.

[0049] In some embodiments, the active ingredient may include one or a combination of several of the following: Myrothamnus falafilica leaf / stem extract, acetylated sodium hyaluronate, sodium hyaluronate, sodium hyaluronate crosspolymer, hydrolyzed sodium hyaluronate, Paeonia suffruticosa seed oil, Paeonia suffruticosa root extract, squalane, Aloe barbadensis leaf juice, and collagen.

[0050] It is understandable that those skilled in the art can select appropriate active ingredients and their contents according to the needs of the product.

[0051] The second aspect of this application provides a method for preparing the lipstick of the first aspect, comprising the following steps S110 to S140.

[0052] S110, preparing phase A, includes mixing the oil phase with the emulsifying composition and the emulsifying synergist composition at an emulsification temperature to obtain phase A.

[0053] In step S110, the oil phase, emulsifying composition, and emulsifying synergistic composition may include the oil phase, emulsifying composition, and emulsifying synergistic composition of any embodiment of the first aspect of this application. Emulsification temperature has a meaning known in the art; it can represent the temperature at which the emulsification reaction occurs in the emulsification system. Those skilled in the art can select a suitable emulsification temperature based on the composition of the emulsification system, and no limitation is made herein.

[0054] S120, preparing phase B, includes heating the aqueous phase to the emulsification temperature to obtain phase B.

[0055] S130, preparing a mixture, includes adding phase B to phase A, stirring at 3000 rpm to 7500 rpm for 5 min to 20 min, and cooling to 40℃ to 60℃ to obtain a mixture.

[0056] S140, Preparation of lipstick, comprising mixing the active ingredient with a mixture evenly and then cooling to obtain the lipstick.

[0057] According to the method of this application, by selecting suitable emulsifying compositions and emulsifying synergistic compositions, lipsticks with high water phase content can be prepared. Specifically, on the one hand, the emulsifying composition has good compatibility with waxes in the oil phase component, allowing the waxes to maintain their molding effect and a certain degree of hardness even when present in the dispersed phase. On the other hand, the emulsifying synergistic composition can further enhance the emulsification efficiency of the emulsifying composition, resulting in smaller and more uniform micelle particle sizes formed during emulsification, while reducing the surface energy of the system and stabilizing the emulsion system. This reduces the risk of emulsion system stratification, aggregation, or demulsification. Thus, through the synergistic effect of the emulsifying composition and the emulsifying synergistic composition, the upper limit of the water phase content in the emulsion system can be increased while ensuring product quality, thereby enabling the prepared lipstick to have a high water phase content. Therefore, the lipstick prepared according to the method of this application can have both excellent texture and appearance, and possess excellent water-like feel and moisturizing properties.

[0058] In some embodiments, the emulsification temperature can be 75°C to 85°C, for example, 75°C, 78°C, 80°C, 82°C, 85°C, or within any two of the above values.

[0059] When the emulsification temperature is within the aforementioned suitable range, it helps the emulsifier to function effectively, forming a uniform and stable emulsion system, further reducing the risk of stratification, aggregation, or demulsification. Furthermore, controlling the emulsification temperature can optimize the emulsification process and improve production efficiency.

[0060] Example

[0061] The following examples describe the disclosure of this invention in more detail. These examples are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of this disclosure. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight, and all reagents used in the examples are commercially available or synthesized by conventional methods and can be used directly without further processing. The instruments used in the examples are also commercially available.

[0062] Example 1

[0063] The lipstick of Example 1 was prepared by following steps (1) to (4).

[0064] (1) Mix the oil phase with the emulsion composition, heat to 75℃~85℃, stir the mixture until it is completely dissolved and uniform to obtain phase A.

[0065] (2) Stir the aqueous phase evenly and heat it to the same temperature as phase A to obtain phase B.

[0066] (3) Slowly add phase B to phase A and stir at 3000 rpm to 7500 rpm for 5 min to 20 min. After the mixture is uniform, stop stirring and cool to 60°C to obtain the mixture.

[0067] (4) Add the active ingredient to the above mixture and continue stirring until homogeneous. Cool to obtain lipstick.

[0068] The components and contents of each phase mentioned above can be found in Table 1. As shown in Table 1, the oil phase content is 55.9%, the aqueous phase content is 35.7%, the active ingredient content is 1.2%, the emulsifying composition content is 5.7%, and the emulsifying synergist composition is 1.5%. In the emulsifying composition, the mass ratio (denoted as a:b:c:d) of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid is 1:1.2:0.5:0.15. In the emulsifying synergist composition, the mass ratio (denoted as e:f) of urushiol wax and sorbitan olive oil ester is 1:0.5.

[0069] Table 1

[0070] Examples 2-7

[0071] According to Table 2, the content of each phase was adjusted to prepare the lipsticks of Examples 2-7. The preparation process of the lipsticks of Examples 2-7 was the same as that of Example 1, and the composition of each phase in Examples 2-7 was the same as that in Example 1. The same composition of each phase means that the materials used in each phase are the same, and the mass percentage of each material in each phase is also the same, based on the total mass of each phase. For example, in Examples 1-7, the mass percentage of water in the aqueous phase is 47.6%.

[0072] Examples 8-18

[0073] According to Table 2, adjust the ratio of each material in the emulsified composition (a:b:c:d) or the ratio of each material in the emulsifying synergistic composition (e:f) to prepare the lipsticks of Examples 8-18. The preparation process of the lipsticks of Examples 8-18 is the same as that of Example 1, and the content of each phase is the same as that of Example 1.

[0074] Comparative Examples 1-4

[0075] According to Table 2, the content of each phase was adjusted to prepare lipsticks of Comparative Examples 1 to 4. The preparation process of lipsticks of Comparative Examples 1 to 4 was the same as that of Example 1, and the composition of each phase of Comparative Examples 1 to 4 was the same as that of Example 1.

[0076] Test section

[0077] (1) Moisturizing and transdermal water loss test

[0078] Ten participants with similar skin types and age ranges were selected to minimize the impact of individual differences on the test results. Three different sites were selected on each volunteer's lips for testing. Using a Corneometer CM825 (Courage-Khazaka, Germany) CU probe, the initial skin moisture content was measured and recorded at each selected site. After measuring the initial moisture content, the participants applied a thin layer of lipstick sample evenly to their lips. The amount and evenness of application were controlled to ensure consistency. At different time points after lipstick application (immediately, 4 hours, and 8 hours), the moisture content was measured and recorded again at each site using the moisture content probe, and the average value was taken as the skin moisture content at the corresponding time point. Based on the measured data, the rate of change in skin moisture at each site at different time points was calculated. The rate of change in moisture content can be calculated using the following formula: Rate of change in moisture content = (Moisture content after lipstick application - Initial moisture content) / Initial moisture content × 100%.

[0079] The average rate of moisture change of the lip skin of each subject at each time point was calculated as the moisture change rate of the lipstick at each time point. Among them, the immediate moisture change rate was recorded as Q1, the 4-hour moisture change rate as Q2, and the 8-hour moisture change rate as Q3.

[0080] (2) Yield testing

[0081] Following the formulations and steps of the above-described embodiments and comparative examples, 20 lipsticks were prepared for each embodiment and comparative example. After preparation, the morphology of the lipsticks was observed. If they were smooth and flat solids, they were considered qualified products; otherwise, they were considered defective products. Yield = Number of qualified products / 100 × 100%.

[0082] (3) Skin feel assessment

[0083] For the lipsticks prepared in the examples and comparative examples, those that passed the appearance yield test were then subjected to skin feel evaluation by subjects. Results were recorded based on the evaluation results of more than 80% of the subjects.

[0084] The test results of each embodiment and comparative example are shown in Table 3.

[0085] Table 2

[0086] Table 3

[0087] As can be seen from Tables 2 and 3, the lipstick of this application has an excellent water-gloss effect, effectively increasing the hydration of the lips and making them appear fuller. Furthermore, the lipstick of this application also possesses superior lip moisturizing properties, effectively retaining moisture and maintaining the hydration of the lips for a long time. By adding emulsifying and emulsifying synergistic compositions, the lipstick of this application can effectively reduce the risk of emulsion system separation, aggregation, or demulsification. Even with an aqueous phase content of 20%–40% in the lipstick formulation, the lipstick of this application still maintains a good texture and appearance. Therefore, the yield rate of the lipsticks in Examples 1–18 can all reach over 90%, and the skin feel evaluation shows that the texture uniformity, smoothness, and hydration all meet the user's needs. In particular, in the lipstick formulations of Examples 1-10 and 13-16, the proportions of each material in the emulsifying composition and the emulsifying synergistic composition are within a suitable range, which can better stabilize the emulsification system. As a result, the yield of lipsticks in Examples 1-10 and 13-16 can all reach 100%. At the same time, the prepared lipsticks not only have excellent moisturizing properties, but also have the best uniform and delicate texture.

[0088] In contrast, the lipstick formulations of Comparative Examples 1 and 2, lacking the addition of emulsifying compositions, struggled to form stable emulsion systems. Consequently, both Comparative Examples 1 and 2 exhibited significant emulsification during preparation, failing to produce uniformly mixed lipstick particles. Therefore, yield, transdermal water loss testing, and skin feel evaluation were not conducted. While Comparative Examples 3 and 4 included emulsifying compositions, they lacked emulsification synergists. Consequently, Comparative Examples 3 and 4 had limited stabilizing effects on the emulsion system, resulting in lipsticks that still exhibited issues such as color banding, uneven surfaces, and surface water seepage after prolonged storage. This led to lower yields compared to Examples 1-18, and some negative feedback was observed in the skin feel evaluation.

[0089] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A lipstick, comprising, by weight percentage: Oil phase: 51% ~ 78%; Aqueous phase: 20%–40%; Active ingredient: 0–5%; Emulsified composition: 1%–12%; Emulsifying and enhancing composition: 1%–5%; in, The emulsified composition comprises lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid; The emulsifying and enhancing composition includes succinate wax and sorbitan olive oil ester.

2. The lipstick according to claim 1, wherein In terms of mass percentage, it includes: Oil phase: 51% ~ 61%; Aqueous phase: 30%–40%; Active ingredient: 1%–5%; Emulsified composition: 4.5%–7.5%; Emulsifying and enhancing composition: 1.5%–2%.

3. The lipstick according to claim 1, wherein, In the emulsified composition, the mass ratio of lauryl PEG-9 polydimethylsiloxane, caprylic / capric triglyceride, polyglycerol-3 oleate, and polyhydroxystearic acid is 1:(0.25-10):(0.25-12):(0.1-3).

4. The lipstick according to claim 1, wherein, In the emulsifying and enhancing composition, the mass ratio of senna wax and sorbitan olive oil ester is 1:(0.5-10).

5. The lipstick according to claim 1, wherein, In the emulsifying and enhancing composition, the mass ratio of senna wax and sorbitan olive oil ester is 1:(1.8-2.2).

6. The lipstick according to claim 1, wherein, The oil phase includes hydrogenated polyisobutylene, tocopherol, ethylhexylglycerin, polydimethylsiloxane, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, kaolin, trimethylsiloxysilicate, synthetic wax, diethylhexyl carbonate, isododecane, glyceryl behenate / eicosanoate, distearate dimethylammonium lithium montmorillonite, propylene glycol carbonate polyglycerol-3 oleate, caprylic / capric triglyceride, polyhydroxystearic acid, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, jojoba esters, polyglycerol-2 triisostearate, triethoxyoctylsilane, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, HDI / trimethylolhexyl lactone crosspolymer, silica, lecithin, isopropyl myristate, ethylhexyl palmitate, isostearic acid, and dimethylsilylated silica, CI 77891, CI One or a combination of 73360 and CI 77499.

7. The lipstick according to claim 1, wherein, The aqueous phase includes one or a combination of several of the following: deionized water, hydroxyethyl urea, 1,2-hexanediol, 1,2-pentanediol, p-hydroxyacetophenone, and sodium chloride.

8. The lipstick according to claim 1, wherein, The active ingredients include one or a combination of several of the following: Myrothamnus flabellifolia leaf / stem extract, acetylated sodium hyaluronate, sodium hyaluronate, sodium hyaluronate crosspolymer, hydrolyzed sodium hyaluronate, peony seed oil, peony root extract, squalane, aloe vera leaf juice, and collagen.

9. A method for preparing the lipstick according to any one of claims 1 to 8, comprising the following steps: The preparation of phase A includes mixing the oil phase with the emulsifying composition and the emulsifying synergist composition at an emulsification temperature to obtain phase A; The preparation of phase B includes heating the aqueous phase to the emulsification temperature to obtain phase B; The preparation of the mixture includes adding phase B to phase A, stirring at 3000 rpm to 7500 rpm for 5 min to 20 min, and cooling to 40℃ to 60℃ to obtain the mixture; The preparation of lipstick includes mixing the active ingredient with the mixture until homogeneous, and then cooling to obtain the lipstick.

10. The method of claim 9, wherein, The emulsification temperature is 75℃~85℃.

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