Fumed white carbon black modified film-forming agent and lipstick composition

Abstract

The invention relates to a fumed silica modified film-forming agent and a lipstick composition, belongs to the technical field of cosmetics, and aims at solving the problem that a traditional lipstick is stained with a cup and fades due to loose film layers and pigment migration and improving the use comfort and the comprehensive performance at the same time. Vapor-phase white carbon black is adopted for modification, beta-cyclodextrin reacts with an epoxy silane coupling agent (KH-560) to generate a cyclodextrin-siloxane hybrid, the hybrid is in condensation connection with hydroxyl on the surface of the gas-phase white carbon black, and a composite structure with a pigment inclusion cavity and a siloxane film-forming chain is formed. Based on the modified fumed silica, the invention further provides a film-forming agent containing dimethyl silicone oil, poly-alpha-olefin, octyl silicone oil gel elastomer and other components, and a lipstick composition containing plant extracts and moisturizing components is prepared on the basis of the film-forming agent.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics and relates to a film-forming agent modified with fumed silica and a lipstick composition. Background Art

[0002] Lipstick, a must-have in modern women's daily makeup routine, enhances complexion and allure, but it still faces numerous user pain points. Traditional lipsticks are commonly found to "fade" on cups. After drinking or eating, consumers often leave noticeable pigment marks on their lips, and embarrassing lip marks can also be left on cup walls, severely impacting both the user experience and their social image. The root cause of this problem lies in the insufficient bonding between the lipstick film-forming agent and the pigment, resulting in a less dense film structure that effectively locks in the pigment particles. Furthermore, traditional lipsticks can be prone to drying, lack moisturizing properties, and have a short lasting effect. Frequent reapplying is particularly inconvenient for those with dry lips and can exacerbate dryness and peeling. As consumers' expectations for cosmetic quality continue to rise, the industry urgently needs to develop new lipstick products that offer excellent lasting effects, good moisturizing properties, and are safe and environmentally friendly.

[0003] In response to the many defects in lipstick use, the industry has conducted multi-faceted improvement research. In terms of improving the lasting effect of makeup, traditional technologies mainly use physical encapsulation methods to encapsulate pigment particles in polymer materials, such as using silica or talc as an adsorption carrier; surfactants are also used to modify the pigment surface to increase its compatibility with film-forming agents; and the film structure is optimized by introducing ingredients such as silicone elastomers and synthetic waxes to increase the density of the film layer. In terms of improving moisturizing properties, moisturizing ingredients such as hyaluronic acid, squalane, and plant essential oils are often added, or nutritional additives with a sustained-release effect are used. In addition, to enhance the user experience, researchers have also developed a variety of functional ingredients, such as plant extracts with antioxidant effects and herbal essences that soothe the skin. Although these improvements have improved the performance of lipstick to a certain extent, most of them remain at the surface modification level and fail to fundamentally solve the problems of pigment migration and film stability.

[0004] Although the existing technology has optimized the performance of lipstick in many aspects, it still has obvious shortcomings. First, the physical coating method has problems such as uneven coating and poor stability, and long-term use can easily lead to pigment shedding; surfactant modification may affect the compatibility of the film-forming agent and the pigment, resulting in an uneven film layer. Secondly, there is a lack of effective chemical bonding between the existing film-forming system and the pigment. When there is external friction or humidity changes, the pigment is easily separated from the film layer. Furthermore, the introduction of functional additives often affects the basic physical properties of lipstick, such as increasing the greasy feel or reducing the glossiness, making it difficult to achieve a synergistic improvement in multiple functions. In addition, most of the improved technical processes are complex and costly, making them difficult to mass-produce industrially. In response to these problems, the development of a new film-forming agent system that can effectively lock the pigment and form a stable and dense film layer, while taking into account both moisturizing and comfort, has become a key direction for lipstick product innovation. Summary of the Invention

[0005] The present invention aims to provide a film-forming agent modified with fumed silica and a lipstick composition. Fumed silica is added to the film-forming agent for modification to form a denser film structure, reduce pigment migration, and reduce lipstick cup sticking.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A film-forming agent modified with fumed silica, wherein the film-forming agent is obtained by reacting a cyclodextrin-siloxane hybrid with hydroxyl groups on the surface of fumed silica; The cyclodextrin-siloxane hybrid is obtained by reacting β-cyclodextrin with an epoxysilane coupling agent.

[0007] As a preferred technical solution of the present invention, the fumed silica modification comprises the following steps: A1. Vacuum dry β-cyclodextrin to constant weight, add anhydrous ethanol and stir to dissolve under nitrogen protection; A2. Add silane coupling agent KH-560 and glacial acetic acid dropwise to the β-cyclodextrin solution prepared in step A1 to catalyze the reaction to obtain a cyclodextrin-siloxane solution; A3. Disperse fumed silica in anhydrous ethanol, add the cyclodextrin-siloxane solution prepared in step A2 dropwise to the fumed silica ethanol solution, adjust the pH to 5.0-5.5 with glacial acetic acid, and react for 12-15 hours to obtain modified fumed silica.

[0008] As a preferred technical solution of the present invention, the mass ratio of β-cyclodextrin to anhydrous ethanol in step A1 is 1:4-6.

[0009] As a preferred technical solution of the present invention, the mass ratio of β-cyclodextrin, silane coupling agent KH-560 and glacial acetic acid in step A2 is 1:1.5-2.5:0.02-0.2; and the catalytic reaction temperature is 55-65°C.

[0010] As a preferred technical solution of the present invention, the mass ratio of the fumed silica, anhydrous ethanol, and cyclodextrin-siloxane solution in step A3 is 1:4-6:0.8-1.2.

[0011] Furthermore, the fumed silica modified film-forming agent comprises the following raw materials in parts by weight: 1-3 parts modified fumed silica, 4-6 parts dimethyl silicone oil, 2-4 parts polyalphaolefin, 8-12 parts trimethylsiloxysilicate, 3-7 parts octyl silicone gel elastomer, 2-6 parts diisostearyl malate, 2-4 parts synthetic wax 30919, 2-4 parts siliconized titanium dioxide, 2-4 parts color powder, 0.2-0.8 parts hydrogenated lecithin Picocare SE, 0.1-0.3 parts alpha arbutin and 0.02-0.06 parts sodium hyaluronate.

[0012] As a preferred technical solution of the present invention, the preparation of the fumed silica modified film-forming agent comprises the following steps: B1. Add modified fumed silica to dimethyl silicone oil and homogenize, then add poly-α-olefin and mix to obtain a homogeneous paste; B2. Melt and mix trimethylsiloxysilicate, octyl silicone gel elastomer, diisostearyl malate, and synthetic wax 30919, then add the homogeneous paste prepared in step B1 and homogenize again; B4, premixing silicon-treated titanium dioxide and color powder with 2-4% caprylic / decanoic acid triglyceride, adding hydrogenated lecithin Picocare SE, α-arbutin and sodium hyaluronate, mixing evenly, and then adding the system prepared in step B2 to mix evenly; B5. Add 2-4% polyglyceryl-3 diisostearate, 1-3% polyglyceryl-2 triisostearate, and 1-3% dibutyl ethylhexanoyl glutamine to the mixture prepared in step B4, stir evenly, then add preservatives p-hydroxybenzoate and disodium EDTA and mix evenly to obtain the mixture.

[0013] Furthermore, the lipstick composition comprises the following raw materials in parts by weight: 10-20 parts of fumed silica modified film-forming agent, 0.3-0.5 parts of kelp extract, 0.2-0.4 parts of soapberry extract, 0.3-0.6 parts of long-stem grape fern extract, 0.01-0.02 parts of acetyl hexapeptide-8, 1-1.8 parts of sorbitan isostearate, 20-30 parts of base solvent, 2-3 parts of glycerol, 0.5-0.8 parts of betaine, 0.5-1 parts of ethylhexyl salicylate and 0.3-0.6 parts of triethanolamine.

[0014] As a preferred technical solution of the present invention, the base solvent includes: 8-10 parts by weight of cosmetic-grade white oil, 6-8 parts of caprylic and capric triglyceride, 1-2 parts of myristic acid, 1-2 parts of myristic acid, 4-5 parts of C12-15 alcohol benzoate and 1-2 parts of diethoxyethyl succinate.

[0015] As a preferred technical solution of the present invention, the triethanolamine is a pH regulator, which is used to adjust the pH of the lipstick composition to 6.0-6.5.

[0016] Beneficial effects of the present invention: (1) In the composite structure of the modified fumed silica of the present invention, the "pigment inclusion cavity" formed by the cyclodextrin-siloxane hybrid can fix pigment particles (such as titanium dioxide, toner) inside the cavity by adsorbing them; at the same time, the silicon-oxygen bond (-Si-O-Si-) network of the siloxane and the film-forming agent (dimethyl silicone oil, poly-α-olefin) cooperates to form a dense film structure, which effectively blocks the outward migration of pigment particles due to friction or humidity changes.

[0017] (2) The high surface energy characteristics of siloxane (excellent compatibility with film-forming agents such as silicone resins and synthetic waxes) can be embedded in the gaps between the molecular chains of the film-forming agent to fill the microscopic defects of the film layer; at the same time, the condensation connection between the cyclodextrin-siloxane hybrid and the hydroxyl groups on the surface of fumed silica enhances the interfacial bonding force between the filler and the film-forming agent, making the film layer tighter and firmer, and prolonging the makeup holding time.

[0018] (3) The plant ingredients added to the lipstick composition, such as Kirinja extract (antioxidant), Sapindus mukorossi extract (soothing), and long-stem grape fern extract (anti-inflammatory), can release active ingredients on the lips and reduce the dryness of traditional film-forming agents; glycerol (moisturizing), betaine (amphoteric moisturizer) and sodium hyaluronate (small molecule moisturizing) synergistically increase the moisture content of the lips; acetyl hexapeptide-8 (lightens lip lines) gives the product an additional anti-aging function. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0020] The sources of the raw materials involved in the following examples and comparative examples are as follows: The poly-α-olefin was purchased from Shanghai Daopu Chemical Co., Ltd.; trimethylsiloxysilicate was purchased from Mozhiyuan New Materials Co., Ltd.; octyl silicone oil gel elastomer was purchased from Guangzhou Zhengqian Biotechnology Co., Ltd.; synthetic wax 30919 was purchased from Fangyu Chemical Co., Ltd.; silicon-treated titanium dioxide was purchased from Guangzhou Meiyi Biotechnology Co., Ltd.; color powder was purchased from Shanghai Yueguan Industrial Co., Ltd.; hydrogenated lecithin Picocare SE was purchased from Guangzhou Feike Daily Chemical Co., Ltd.; polyglycerol-3 diisostearate and polyglycerol-2 triisostearate were purchased from Shandong Binzhou Jinsheng New Materials Technology Co., Ltd.; kylin extract was purchased from Huaxing Biological Co., Ltd.; soapberry extract was purchased from Shaanxi Jintai Bioengineering Co., Ltd.; long-stem grape fern extract was purchased from Ningxia Vanilla Biotechnology Co., Ltd.; cosmetic-grade white oil was purchased from Guangzhou Suixin Chemical Co., Ltd.; tetradecanoic acid was purchased from Guangzhou Ketai Chemical Co., Ltd.; C12-15 alcohol benzoate was purchased from Boshuo Industrial Co., Ltd.

[0021] Example 1 A film-forming agent modified with fumed silica, wherein the film-forming agent is obtained by reacting a cyclodextrin-siloxane hybrid with hydroxyl groups on the surface of fumed silica; The cyclodextrin-siloxane hybrid is obtained by reacting β-cyclodextrin with an epoxysilane coupling agent.

[0022] The fumed silica modification comprises the following steps: A1. Vacuum dry β-cyclodextrin to constant weight, add anhydrous ethanol and stir to dissolve under nitrogen protection; A2. Add silane coupling agent KH-560 and glacial acetic acid dropwise to the β-cyclodextrin solution prepared in step A1 to catalyze the reaction to obtain a cyclodextrin-siloxane solution; A3. Disperse fumed silica in anhydrous ethanol, add the cyclodextrin-siloxane solution prepared in step A2 dropwise to the fumed silica ethanol solution, adjust the pH to 5.3 with glacial acetic acid, and react for 13 h to obtain modified fumed silica.

[0023] The mass ratio of β-cyclodextrin to anhydrous ethanol in step A1 is 1:5.

[0024] In step A2, the mass ratio of β-cyclodextrin, silane coupling agent KH-560 and glacial acetic acid is 1:2:0.1; and the catalytic reaction temperature is 60°C.

[0025] The mass ratio of the fumed silica, anhydrous ethanol, and cyclodextrin-siloxane solution in step A3 is 1:5:1.

[0026] The fumed silica modified film-forming agent comprises the following raw materials in parts by weight: 2 parts modified fumed silica, 5 parts dimethicone, 3 parts polyalphaolefin, 10 parts trimethylsiloxysilicate, 5 parts octyl silicone gel elastomer, 4 parts diisostearyl malate, 3 parts synthetic wax 30919, 3 parts siliconized titanium dioxide, 3 parts color powder, 1 part hydrogenated lecithin Picocare SE, 0.2 parts alpha arbutin and 0.04 parts sodium hyaluronate.

[0027] The preparation of the fumed silica modified film-forming agent comprises the following steps: B1. Add modified fumed silica to dimethyl silicone oil and homogenize, then add poly-α-olefin and mix to obtain a homogeneous paste; B2. Melt and mix trimethylsiloxysilicate, octyl silicone gel elastomer, diisostearyl malate, and synthetic wax 30919, then add the homogeneous paste prepared in step B1 and homogenize again; B4, premixing silicon-treated titanium dioxide and color powder with 3% caprylic / decanoic acid triglyceride, adding hydrogenated lecithin Picocare SE, α-arbutin, and sodium hyaluronate, mixing evenly, and then adding the mixture prepared in step B2 to mix evenly; B5. Add 3% polyglyceryl-3 diisostearate, 2% polyglyceryl-2 triisostearate, and 2% dibutyl ethylhexanoyl glutamine to the mixture prepared in step B4, stir evenly, then add 0.2% preservative paraben and 0.1% disodium EDTA and mix evenly to obtain the mixture.

[0028] A lipstick composition comprising the following raw materials in parts by weight: 15 parts of fumed silica modified film-forming agent, 0.4 parts of Kirin extract, 0.3 parts of soapberry extract, 0.4 parts of long-stem grape fern extract, 0.015 parts of acetyl hexapeptide-8, 1.4 parts of sorbitan isostearate, 25 parts of base solvent, 2.5 parts of glycerin, 0.6 parts of betaine, 0.7 parts of ethylhexyl salicylate and 0.5 parts of triethanolamine.

[0029] The base solvent comprises: 9 parts by weight of cosmetic grade white oil, 7 parts of caprylic / capric triglyceride, 1.5 parts of myristic acid, 1.5 parts of myristic acid, 4.5 parts of C12-15 alcohol benzoate and 1.5 parts of diethoxyethyl succinate.

[0030] The triethanolamine is a pH regulator, used to adjust the pH of the lipstick composition to 6.2.

[0031] Example 2 A film-forming agent modified with fumed silica, wherein the film-forming agent is obtained by reacting a cyclodextrin-siloxane hybrid with hydroxyl groups on the surface of fumed silica; The cyclodextrin-siloxane hybrid is obtained by reacting β-cyclodextrin with an epoxysilane coupling agent.

[0032] The fumed silica modification comprises the following steps: A1. Vacuum dry β-cyclodextrin to constant weight, add anhydrous ethanol and stir to dissolve under nitrogen protection; A2. Add silane coupling agent KH-560 and glacial acetic acid dropwise to the β-cyclodextrin solution prepared in step A1 to catalyze the reaction to obtain a cyclodextrin-siloxane solution; A3. Disperse fumed silica in anhydrous ethanol, add the cyclodextrin-siloxane solution prepared in step A2 dropwise to the fumed silica ethanol solution, adjust the pH to 5.0 with glacial acetic acid, and react for 12 hours to obtain modified fumed silica.

[0033] The mass ratio of β-cyclodextrin to anhydrous ethanol in step A1 is 1:4.

[0034] In step A2, the mass ratio of β-cyclodextrin, silane coupling agent KH-560 and glacial acetic acid is 1:1.5:0.02; and the catalytic reaction temperature is 55°C.

[0035] The mass ratio of the fumed silica, anhydrous ethanol, and cyclodextrin-siloxane solution in step A3 is 1:4:0.8.

[0036] The fumed silica modified film-forming agent comprises the following raw materials in parts by weight: 1 part modified fumed silica, 4 parts dimethicone, 2 parts polyalphaolefin, 8 parts trimethylsiloxysilicate, 3 parts octyl silicone gel elastomer, 2 parts diisostearyl malate, 2 parts synthetic wax 30919, 2 parts siliconized titanium dioxide, 2 parts color powder, 0.2 parts hydrogenated lecithin Picocare SE, 0.1 parts alpha arbutin and 0.02 parts sodium hyaluronate.

[0037] The preparation of the fumed silica modified film-forming agent comprises the following steps: B1. Add modified fumed silica to dimethyl silicone oil and homogenize, then add poly-α-olefin and mix to obtain a homogeneous paste; B2. Melt and mix trimethylsiloxysilicate, octyl silicone gel elastomer, diisostearyl malate, and synthetic wax 30919, then add the homogeneous paste prepared in step B1 and homogenize again; B4, premixing silicon-treated titanium dioxide and color powder with 2% caprylic / decanoic acid triglyceride, adding hydrogenated lecithin Picocare SE, α-arbutin, and sodium hyaluronate, mixing evenly, and then adding the mixture prepared in step B2 to mix evenly; B5. Add 2% polyglyceryl-3 diisostearate, 1% polyglyceryl-2 triisostearate, and 1% dibutyl ethylhexanoyl glutamine to the mixture prepared in step B4, stir evenly, then add 0.25 preservatives paraben and 0.1% disodium EDTA and mix evenly to obtain the mixture.

[0038] A lipstick composition comprising the following raw materials in parts by weight: 10 parts of fumed silica modified film-forming agent, 0.3 parts of Kirin extract, 0.2 parts of soapberry extract, 0.3 parts of long-stem grape fern extract, 0.01 parts of acetyl hexapeptide-8, 1 part of sorbitan isostearate, 20 parts of base solvent, 2 parts of glycerol, 0.5 parts of betaine, 0.5 parts of ethylhexyl salicylate and 0.3 parts of triethanolamine.

[0039] The base solvent comprises: 8 parts by weight of cosmetic grade white oil, 6 parts of caprylic and capric triglyceride, 1 part of myristic acid, 1 part of myristic acid, 4 parts of C12-15 alcohol benzoate and 1 part of diethoxyethyl succinate.

[0040] The triethanolamine is a pH regulator, used to adjust the pH of the lipstick composition to 6.5.

[0041] Example 3 A film-forming agent modified with fumed silica, wherein the film-forming agent is obtained by reacting a cyclodextrin-siloxane hybrid with hydroxyl groups on the surface of fumed silica; The cyclodextrin-siloxane hybrid is obtained by reacting β-cyclodextrin with an epoxysilane coupling agent.

[0042] The fumed silica modification comprises the following steps: A1. Vacuum dry β-cyclodextrin to constant weight, add anhydrous ethanol and stir to dissolve under nitrogen protection; A2. Add silane coupling agent KH-560 and glacial acetic acid dropwise to the β-cyclodextrin solution prepared in step A1 to catalyze the reaction to obtain a cyclodextrin-siloxane solution; A3. Disperse fumed silica in anhydrous ethanol, add the cyclodextrin-siloxane solution prepared in step A2 dropwise to the fumed silica ethanol solution, adjust the pH to 5.5 with glacial acetic acid, and react for 15 hours to obtain modified fumed silica.

[0043] The mass ratio of β-cyclodextrin to anhydrous ethanol in step A1 is 1:6.

[0044] In step A2, the mass ratio of β-cyclodextrin, silane coupling agent KH-560 and glacial acetic acid is 1:2.5:0.2; and the catalytic reaction temperature is 65°C.

[0045] The mass ratio of the fumed silica, anhydrous ethanol, and cyclodextrin-siloxane solution in step A3 is 1:6:1.2.

[0046] The fumed silica modified film-forming agent comprises the following raw materials in parts by weight: 3 parts modified fumed silica, 6 parts dimethicone, 4 parts polyalphaolefin, 12 parts trimethylsiloxysilicate, 7 parts octyl silicone gel elastomer, 6 parts diisostearyl malate, 4 parts synthetic wax 30919, 4 parts siliconized titanium dioxide, 4 parts color powder, 0.8 parts hydrogenated lecithin Picocare SE, 0.3 parts alpha arbutin and 0.06 parts sodium hyaluronate.

[0047] The preparation of the fumed silica modified film-forming agent comprises the following steps: B1. Add modified fumed silica to dimethyl silicone oil and homogenize, then add poly-α-olefin and mix to obtain a homogeneous paste; B2. Melt and mix trimethylsiloxysilicate, octyl silicone gel elastomer, diisostearyl malate, and synthetic wax 30919, then add the homogeneous paste prepared in step B1 and homogenize again; B4, premixing silicon-treated titanium dioxide and color powder with 4% caprylic / decanoic acid triglyceride, adding hydrogenated lecithin Picocare SE, α-arbutin, and sodium hyaluronate, mixing evenly, and then adding the mixture prepared in step B2 to mix evenly; B5. Add 4% polyglyceryl-3 diisostearate, 3% polyglyceryl-2 triisostearate, and 3% dibutyl ethylhexanoyl glutamine to the mixture prepared in step B4, stir evenly, then add 0.2% preservative paraben and 0.1% disodium EDTA and mix evenly to obtain the mixture.

[0048] A lipstick composition comprising the following raw materials in parts by weight: 20 parts of fumed silica modified film-forming agent, 0.5 parts of Kirin extract, 0.4 parts of soapberry extract, 0.6 parts of long-stem grape fern extract, 0.02 parts of acetyl hexapeptide-8, 1.8 parts of sorbitan isostearate, 30 parts of base solvent, 3 parts of glycerol, 0.8 parts of betaine, 1 part of ethylhexyl salicylate and 0.6 parts of triethanolamine.

[0049] The base solvent comprises: 10 parts by weight of cosmetic grade white oil, 8 parts of caprylic and capric triglyceride, 2 parts of myristic acid, 2 parts of myristic acid, 5 parts of C12-15 alcohol benzoate and 2 parts of diethoxyethyl succinate.

[0050] The triethanolamine is a pH regulator, used to adjust the pH of the lipstick composition to 6.0.

[0051] Comparative Example 1 On the basis of Example 1, unmodified silica was used instead of modified silica, and the rest remained the same as Example 1.

[0052] Comparative Example 2 On the basis of Example 1, the operation of adding the silane coupling agent KH-560 was omitted in Step A2, and the rest was consistent with Example 1.

[0053] Comparative Example 3 On the basis of Example 1, the silane coupling agent KH-560 in step A2 was replaced with silane coupling agent KH-550, and the rest remained the same as in Example 1.

[0054] Comparative Example 4 On the basis of Example 1, the film-forming agent was prepared without adding modified white carbon black, and an equal amount of dimethyl silicone oil was used instead. The rest remained the same as Example 1.

[0055] Comparative Example 5 On the basis of Example 1, the film-forming agent was replaced by an equal amount of commercially available organosilicon film-forming agent polymethylsilsesquioxane, and the rest remained the same as Example 1.

[0056] Performance testing: After the lipstick compositions of the examples and comparative examples were uniformly mixed to form solid lipstick, 10 volunteers were recruited to conduct cupping test, color holding test and skin feel test: Cup staining effect: After applying lipstick for 2 minutes, volunteers gently press their lips against the wall of a ceramic cup for 3 seconds and then remove their lips to observe the staining of the cup wall. Color retention: After volunteers apply lipstick for 10 minutes, wipe the lipstick with artificial saliva 10 times and observe the residual rate; Skin feel evaluation: Using actual sensory evaluation, volunteers blindly tested the smoothness and stickiness of the examples and comparative examples. 5 points represent good, 4 points represent better, 3 points represent average, 2 points represent worse, and 1 point represents poor. The data were recorded after 10 people evaluated, and the average value was taken. Stability: Place the lipstick at 45°C for one month and then use a colorimeter to test the color change.

[0057] Stickiness rating: 5 = no stickiness, 1 = very sticky The test results show that the color retention rates (>80%) of Examples 1-3 are significantly higher than those of the unmodified control group (Comparative Example 1) and the commercially available film-forming agent control group (Comparative Example 5), confirming the binding effect of the β-cyclodextrin cavity on the pigment. The performance of Comparative Example 2 (lacking KH-560) is significantly reduced, indicating that epoxysilane coupling is the key to constructing the hybrid. Comparative Example 3 further demonstrates the synergistic effect of the epoxy group and β-cyclodextrin.

[0058] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any indirect modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A film-forming agent modified with fumed silica, characterized in that: The film-forming agent is obtained by the reaction between cyclodextrin-siloxane hybrid and the hydroxyl groups on the surface of fumed silica; The cyclodextrin-siloxane hybrid is obtained by reacting β-cyclodextrin with an epoxysilane coupling agent.

2. The fumed silica modified film-forming agent according to claim 1, characterized in that: The fumed silica modification comprises the following steps: A1. Vacuum dry β-cyclodextrin to constant weight, add anhydrous ethanol and stir to dissolve under nitrogen protection; A2. Add silane coupling agent KH-560 and glacial acetic acid dropwise to the β-cyclodextrin solution prepared in step A1 to catalyze the reaction to obtain a cyclodextrin-siloxane solution; A3. Disperse fumed silica in anhydrous ethanol, add the cyclodextrin-siloxane solution prepared in step A2 dropwise to the fumed silica ethanol solution, adjust the pH to 5.0-5.5 with glacial acetic acid, and react for 12-15 hours to obtain modified fumed silica.

3. The fumed silica modified film-forming agent according to claim 2, characterized in that: The mass ratio of β-cyclodextrin to anhydrous ethanol in step A1 is 1:4-6.

4. The fumed silica modified film-forming agent according to claim 2, characterized in that: In step A2, the mass ratio of β-cyclodextrin, silane coupling agent KH-560 and glacial acetic acid is 1:1.5-2.5:0.02-0.2; and the catalytic reaction temperature is 55-65°C.

5. The fumed silica modified film-forming agent according to claim 2, characterized in that: The mass ratio of the fumed silica, anhydrous ethanol, and cyclodextrin-siloxane solution in step A3 is 1:4-6:0.8-1.

2.

6. A fumed silica modified film-forming agent according to claims 1-5, characterized in that: Contains the following raw materials in parts by weight: 1-3 parts of the modified fumed silica according to any one of claims 1 to 5, 4-6 parts of dimethyl silicone oil, 2-4 parts of polyα-olefin, 8-12 parts of trimethylsiloxysilicate, 3-7 parts of octyl silicone gel elastomer, 2-6 parts of diisostearyl malate, 2-4 parts of synthetic wax 30919, 2-4 parts of silicon-treated titanium dioxide, 2-4 parts of color powder, 0.2-0.8 parts of hydrogenated lecithin Picocare SE, 0.1-0.3 parts of α-arbutin and 0.02-0.06 parts of sodium hyaluronate.

7. The method for preparing a fumed silica modified film-forming agent according to claim 6, characterized in that: The following steps are involved: B1. Add modified fumed silica to dimethyl silicone oil and homogenize, then add poly-α-olefin and mix to obtain a homogeneous paste; B2. Melt and mix trimethylsiloxysilicate, octyl silicone gel elastomer, diisostearyl malate, and synthetic wax 30919, then add the homogeneous paste prepared in step B1 and homogenize again; B4, premixing silicon-treated titanium dioxide and color powder with 2-4% caprylic / decanoic acid triglyceride, adding hydrogenated lecithin Picocare SE, α-arbutin and sodium hyaluronate, mixing evenly, and then adding the system prepared in step B2 to mix evenly; B5. Add 2-4% polyglyceryl-3 diisostearate, 1-3% polyglyceryl-2 triisostearate, and 1-3% dibutyl ethylhexanoyl glutamine to the mixture prepared in step B4, stir evenly, then add preservatives p-hydroxybenzoate and disodium EDTA and mix evenly to obtain the mixture.

8. A lipstick composition comprising a fumed silica modified film-forming agent according to any one of claims 1 to 7, characterized in that: Contains the following raw materials in parts by weight: 10-20 parts of fumed silica modified film-forming agent, 0.3-0.5 parts of kelp extract, 0.2-0.4 parts of soapberry extract, 0.3-0.6 parts of long-stem grape fern extract, 0.01-0.02 parts of acetyl hexapeptide-8, 1-1.8 parts of sorbitan isostearate, 20-30 parts of base solvent, 2-3 parts of glycerol, 0.5-0.8 parts of betaine, 0.5-1 parts of ethylhexyl salicylate and 0.3-0.6 parts of triethanolamine.

9. A lipstick composition according to claim 8, characterized in that: The base solvent comprises: 8-10 parts by weight of cosmetic grade white oil, 6-8 parts of caprylic and capric triglyceride, 1-2 parts of myristic acid, 1-2 parts of tetradecanoic acid, 4-5 parts of C12-15 alcohol benzoate and 1-2 parts of diethoxyethyl succinate.

10. The lipstick composition according to claim 8, characterized in that: The triethanolamine is a pH regulator, used to adjust the pH of the lipstick composition to 6.0-6.5.

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