A foundation with significant effect on improving dullness and its preparation method

Abstract

This invention discloses a foundation liquid with a significant effect on improving dullness and its preparation method. The foundation liquid comprises the following components: a composite oil gel, functional powders, a film-forming agent, surface-treated pigments, an emulsifier, a polyol, a thickener, a stabilizer, moisturizing oils, a preservative, and the balance being water. The foundation liquid utilizes a composite oil gel to reduce the evaporation of volatile oils, maintaining a refreshing feel during application and significantly extending the residence time of volatile oils in the product. The functional powders absorb human sebum, enhancing oil control and makeup longevity. The combination of hard and soft films enhances the film's flexibility, reducing makeup fading. Surface treatment of the pigments achieves "dual-repellent" properties, reducing makeup fading and enhancing skin adhesion, thus synergistically reducing the occurrence of dullness in the foundation liquid.

Description

Technical Field

[0001] This invention relates to the field of cosmetics, specifically to a foundation liquid with a significant effect on improving dullness and its preparation method. Background Technology

[0002] Foundation is a type of base makeup cosmetic that forms a smooth covering on the skin's surface to conceal or disguise facial imperfections such as freckles, acne, and acne scars, making the skin look even, delicate, and with a natural, fitting skin tone. Liquid foundation, as a common type of foundation, has a moisturizing and lightweight texture, is easy to apply, and is suitable for most skin types. It is a very popular base makeup cosmetic today and is loved by consumers.

[0003] Most liquid foundations on the market today suffer from dullness, with some even showing noticeable darkening of the skin tone 1-2 hours after application. Based on a summary and analysis of the formulas of currently available liquid foundations, the following four points have been identified:

[0004] Oil Influence: In order to make liquid foundation easy to apply and feel refreshing on the skin, a lot of volatile oils are usually added to the formula, including isododecane, cyclopentamethoxysiloxane and low viscosity polydimethylsiloxane. However, as time goes by, the volatile oils evaporate, the oils that disperse the powder in the formula decrease, causing the powder to aggregate, resulting in uneven color, uneven color development and dullness.

[0005] The influence of functional powders: Some products lack functional powders in their formulation system because these functional powders have an oil-controlling effect, which can reduce the dullness caused by makeup smudging due to oily skin.

[0006] The effect of film-forming agents: The addition of film-forming agents can form a thin film on the skin surface to help set makeup. However, most products on the market only add film-forming agents that form hard films, such as trimethylsiloxysilicate. When foundation is first applied, the skin looks very white, bright and smooth. However, after a few hours, the skin secretes too much oil, and the oil mixes with the foundation. In addition, with facial expressions and movements, the film-forming agent in the foundation is not flexible enough, and the film of the foundation will be broken. This causes pigment particles to migrate and fall into the depressions or skin folds on the face, making the skin surface no longer smooth and causing dullness.

[0007] The influence of pigments: Pigments with different surface treatments and structures have different stability, resulting in different rates of darkening.

[0008] Therefore, developing a foundation product that can significantly improve dullness has been a problem that those skilled in the art have been eager to solve. Summary of the Invention

[0009] To address the aforementioned technical problems, this invention provides a foundation with a significant effect in improving dullness and its preparation method. The foundation comprises a composite oil gel, functional powders, a film-forming agent, and surface-treated pigments. Based on reasonable raw material selection and proportioning, this invention effectively improves the problem of dullness after foundation application.

[0010] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0011] This invention provides a foundation that significantly improves dullness, comprising the following components by weight percentage:

[0012] Compound oleogel 15-30%,

[0013] Functional powder 1-3%,

[0014] Film-forming agent 6-8%,

[0015] Surface treatment pigment content: 9.6-12.7%.

[0016] Emulsifier 3-5%,

[0017] Polyols 2-8%,

[0018] Thickener 0.5-1.5%,

[0019] Stabilizer 0.5-1.5%,

[0020] Moisturizing oils 8-12%,

[0021] Preservatives 0.8-1.5%,

[0022] The remainder is water.

[0023] Furthermore, by weight percentage, the composite oleogel comprises the following components:

[0024] Isododecane 30-40%,

[0025] Caprylic / capric triglycerides 10-20%,

[0026] Sucrose lauryl esters 1-5%,

[0027] Sucrose stearate 1-3%,

[0028] 1-2% sucrose palmitate

[0029] The remainder is glycerin.

[0030] Furthermore, the preparation method of the composite oleogel is as follows: sucrose laurate, sucrose stearate, sucrose palmitate and glycerol are heated and melted, mixed evenly, and then isododecane and caprylic / capric triglycerides are slowly added to the mixture of emulsifier and glycerol under stirring conditions. After the addition is complete, high-speed shearing is performed to prepare the composite oleogel.

[0031] The composite oleogel added to the foundation liquid of this invention is not a traditional network-structured gel. It is actually a D-phase gel consisting of glycerol and sucrose esters as the outer phase and containing a large amount of tightly packed oil phase. This composite oleogel encapsulates highly volatile isododecane within its inner phase, which not only does not affect the spreadability of the foundation liquid during application but also significantly prolongs the residence time of isododecane in the foundation liquid, avoiding the dulling phenomenon caused by powder aggregation due to a significant reduction in the oil content of the dispersed powder in the formula.

[0032] Furthermore, the functional powder is silica.

[0033] This invention utilizes a specially treated silica with a hollow, porous spherical structure. This porous structure gives it a large specific surface area. Ordinary silica has an oil absorption value of 80ml / 100g, while porous silica has an oil absorption value of 250ml / 100g. Furthermore, the specially treated silica is an oleophilic and hydrophobic substance, selectively absorbing sebum without absorbing water. Applying this powder to the formulation can reduce makeup smudging caused by oily skin. The hollow silica has an average particle size of 9.0µm. Using the above-mentioned addition amount, it can better exert its oil-control and makeup-holding effects, thereby reducing dullness.

[0034] Furthermore, the film-forming agent comprises trimethylsilanoyl silicate and polymethylsilsesquioxane; the mass ratio of trimethylsilanoyl silicate to polymethylsilsesquioxane is 6:4.

[0035] The trimethylsiloxysilicate selected in this invention is a highly hydrophobic, oil-soluble film-forming agent, belonging to the MQ type resin. It possesses excellent film-forming properties, forming a hard film that improves durability, color migration resistance, and excellent water and oil repellency. When used in foundation formulations, it exhibits good water resistance and abrasion resistance, effectively reducing pigment migration. Polymethylsilsesquioxane is also a highly hydrophobic, oil-soluble film-forming agent with a ladder-like or cage-like structure. It has good film-forming properties and can form a more flexible film on the skin surface than MQ type resins. This soft film can improve skin elasticity to a certain extent, increase the comfort of makeup formulations, and enhance durability, color migration resistance, and water and oil repellency. The foundation liquid of this invention, by adding trimethylsiloxysilicate and polymethylsilsesquioxane, that is, a combination of hard film and soft film, forms a film that is visually complete and, after drying, is dry, soft and tough. It is softer and tougher than the hard film formed by adding trimethylsiloxysilicate alone, and is less prone to breakage, greatly reducing the occurrence of dullness.

[0036] Furthermore, by mass percentage, the surface treatment pigment comprises the following components: 8-10% titanium dioxide, 0.2-0.4% perfluorooctyltriethoxysilane, 0.1-0.2% hydrogenated lecithin, 0.2-0.4% iron oxide red, 0.1-0.2% iron oxide black, and 1.0-1.5% iron oxide yellow.

[0037] Furthermore, the titanium dioxide mentioned is rutile titanium dioxide.

[0038] Pigment treated with perfluorooctyltriethoxysilane possesses both hydrophobic and oleophobic properties. This "dual-repellent" characteristic makes the foundation less prone to smudging due to sweat or oil production. Pigment treated with hydrogenated lecithin not only offers a superior skin feel but also enhances its affinity with the skin, increasing its staying power. The foundation described in this invention uses perfluorooctyltriethoxysilane and hydrogenated lecithin to surface-treat titanium dioxide, giving the pigments "dual-repellent" properties. This results in a foundation that is less prone to smudging, has a better skin feel, better adherence, stronger staying power, and effectively reduces dullness.

[0039] Furthermore, the emulsifier is at least one of PEG-10 polydimethylsiloxane and lauryl PEG-9 polydimethylsiloxane; the polyol is at least one of glycerol and butanediol.

[0040] Furthermore, the thickener is distearate dimethylammonium lithium montmorillonite; the stabilizer is sodium chloride.

[0041] Furthermore, the moisturizing oil is at least one of polydimethylsiloxane and isohexadecane; the preservative is at least one of phenoxyethanol, octyl glycol and ethylhexylglycerin.

[0042] The present invention also provides a method for preparing the aforementioned foundation liquid, comprising the following steps:

[0043] S1: Preparation of the oil phase: After adding a film-forming agent to the moisturizing oil and stirring to dissolve it, add functional powder, surface treatment color powder, emulsifier and thickener, then add composite oleogel, heat to 70-80℃, stir evenly, and homogenize at low speed until completely dispersed to obtain the oil phase;

[0044] S2: Preparation of aqueous phase: Add polyol and stabilizer to water, heat to 70-80℃, stir to dissolve, keep warm for 20-30 min to obtain aqueous phase;

[0045] S3: Emulsification: Turn on the homogenizer, slowly add the aqueous phase from step S2 to the oil phase from step S1, stir until evenly mixed, cool to 40-45℃, add preservative and stir evenly to obtain foundation liquid.

[0046] A foundation with a significant effect on improving dullness, comprising the following components by weight percentage:

[0047] 15% compound oleogel

[0048] 3% silica

[0049] Trimethylsilyloxysilicate 3.6%

[0050] Polymethylsilsesquioxane 2.4%

[0051] Surface treatment pigment 12.7%

[0052] PEG-10 polydimethylsiloxane 2%

[0053] Lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane 1%

[0054] 5% glycerin

[0055] Butylene glycol 1%

[0056] Distearate, lithium dimethylammonium montmorillonite, 0.5%

[0057] Sodium chloride 0.5%

[0058] 8% polydimethylsiloxane

[0059] Isohexadecane 2%

[0060] Phenoxyethanol 0.7%

[0061] Caprylyl glycol 0.2%

[0062] Ethylhexylglycerin 0.1%

[0063] The remainder is water;

[0064] The composite oil gel, by mass percentage of the foundation liquid, consists of: 6% isododecane, 3% caprylic / capric triglyceride, 0.5% sucrose laurate, 0.3% sucrose stearate, and 0.2% sucrose palmitate; the balance is glycerin.

[0065] Compared with the prior art, the beneficial effects of the technical solution provided by the present invention are as follows:

[0066] The foundation liquid described in this invention reduces the evaporation of volatile oils through a composite oleogel, maintaining a refreshing feel on the skin during application and significantly extending the residence time of volatile oils in the product, thus reducing dullness. Functional powders enhance oil control and makeup longevity by absorbing sebum from the skin. The combination of hard and soft films enhances the film's flexibility, reducing makeup slippage. Surface treatment of the pigments achieves "dual-repellent" properties, reducing makeup slippage and enhancing skin adhesion. Through the synergistic effect of these four aspects, dullness is effectively reduced. Detailed Implementation

[0067] The claims of the present invention will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of protection of the claims of the present invention are still within the scope of protection of the claims of the present invention. Example 1

[0068] The formulas of foundation liquids 1-3 that have a significant effect on improving dullness are shown in Table 1.

[0069] Table 1: Formulas for Foundation Liquids 1-3

[0070]

[0071] A method for preparing a foundation with a significant effect on improving dullness includes the following steps:

[0072] (1) Preparation of composite oleogel: Sucrose laurate, sucrose stearate, sucrose palmitate and glycerol are heated and melted, mixed evenly, and then isododecane and caprylic / capric triglyceride are slowly added to the above mixture under stirring conditions. After the addition is complete, high-speed shearing is performed to prepare composite oleogel.

[0073] (2) Preparation of oil phase: Trimethylsiloxane and polymethylsilsesquioxane were added to polydimethylsiloxane and isohexadecane and stirred to dissolve. Then silica, titanium dioxide (rutile titanium dioxide was used), perfluorooctyltriethoxysilane, hydrogenated lecithin, iron oxide red, iron oxide black, iron oxide yellow, PEG-10 polydimethylsiloxane, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, distearate dimethylammonium lithium montmorillonite, and finally composite oil gel was added. The mixture was heated to 70-80℃, stirred evenly, and homogenized at low speed until completely dispersed to obtain the oil phase.

[0074] The silica used is a special silica (commercially available) with a surface treated with triethoxyoctylsilane.

[0075] The treated silica has perfect water resistance and a silky feel, and it can improve adhesion and dispersion on the skin.

[0076] (3) Preparation of aqueous phase: Add glycerol, butanediol and sodium chloride to water, heat to 70-80℃, stir to dissolve, keep warm for 20-30 min to obtain aqueous phase;

[0077] (4) Emulsification: Turn on the homogenizer, slowly add the aqueous phase from step (3) to the oil phase from step (2), stir until the mixture is uniform, cool down to 40-45℃, add phenoxyethanol, octyl glycol and ethylhexylglycerin, stir evenly, discharge the material to obtain the foundation liquid. Example 2

[0078] To verify the effect of composite oil gel on the residence time of volatile oils in liquid foundation, an evaporation test was conducted.

[0079] 1. Test method:

[0080] Experimental group: The foundation liquid 1 sample was prepared according to the formula of foundation liquid 1, wherein the components and weights of the composite oil gel are: 6g isododecane, 3g caprylic / capric triglyceride, 0.5g sucrose laurate, 0.3g sucrose stearate, 0.2g sucrose palmitate, and the balance is glycerin.

[0081] Control group: The composite oil gel in the formula of foundation liquid 1 was not prepared in advance. Instead, it was added according to the ingredients and weight of the composite oil gel during the preparation of foundation liquid. Then, foundation liquid samples were prepared according to the formula and process of foundation liquid 1.

[0082] Under constant temperature and humidity (temperature 25℃, humidity 67%), 100g of foundation liquid samples were taken and the weight of the foundation liquid was tested at different times.

[0083] 2. Test results: See Table 2. The data in Table 2 shows that the foundation in the experimental group was completely evaporated after 6 hours, while the foundation in the control group was basically evaporated after 1 hour. This indicates that the prepared composite oil gel can effectively prolong the residence time of volatile substances in the foundation, thereby reducing the occurrence of dullness.

[0084] Table 2: Foundation weight at different times

[0085]

[0086] Example 3: Oil Absorption Value Test

[0087] Place a funnel with filter paper on a 10ml graduated cylinder. Add 2g each of silica, polymethyl methacrylate (PMMA powder), mica, boron nitride, and vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinking polymer to the funnel. Then pour 10ml of caprylic / capric triglyceride into the funnel and filter for 15 minutes. Record the volume of oil filtered out in the graduated cylinder and calculate the oil absorption (oil absorption = V total - V filtered out).

[0088] The results are shown in Table 3. The table lists several commonly used functional powders for oil absorption. Silica exhibits the highest oil absorption capacity, reaching 250 ml / 100g. Human skin's natural sebum contains approximately 43.2% triglycerides, 25% wax esters, 16.4% fatty acids, and 12% squalene, along with cholesterol and esters. Triglycerides constitute the largest proportion. This example uses caprylic / capric triglycerides for testing, which effectively reflects the absorption of sebum by functional powders. Therefore, applying functional silica powder to foundation can absorb excess sebum secreted by the skin, preventing makeup smudging and dullness caused by oiliness.

[0089] Table 3: Oil absorption values ​​of different functional powders

[0090]

[0091] Example 4: Film-forming properties and flexibility test

[0092] Trimethylsiloxane and polymethylsilsesquioxane were dissolved in polydimethylsiloxane in a certain proportion (Table 4), and then coated onto soft, foldable plastic cards for folding tests and observed under a microscope at 100x magnification to check the integrity of the film.

[0093] The results are shown in Table 4. When the ratio of trimethylsiloxysilicate to polymethylsilsesquioxane was less than 6:4, the film formed was intact and without obvious breakage in both folding tests and microscopic observation. This indicates that the combination of the two film-forming agents can achieve the effect of intact film formation after drying, with strong flexibility. Since the price of polymethylsilsesquioxane is 2-3 times that of trimethylsiloxysilicate, a weight ratio of 6:4 for trimethylsiloxysilicate to polymethylsilsesquioxane is the most cost-effective combination. When applied to liquid foundation, it can greatly increase makeup staying power, enhance film flexibility, and prevent it from being easily destroyed by facial expressions, thereby significantly reducing the occurrence of dullness.

[0094] Table 4: Integrity and Flexibility Tests of Film Formation

[0095]

[0096] Example 5: Consumer Survey

[0097] Thirty female volunteers aged 18-45 were selected and divided into three groups: A, B, and C. They were given three foundations (A, B, and C) applied evenly, and the makeup's staying power and its effect on improving dullness were evaluated. A score of 5 was considered excellent, 4 excellent, 3 average, 2 poor, and 1 very poor. Scores were also given at 1 hour, 2 hours, 4 hours, 6 hours, 8 hours, and 10 hours after application.

[0098] The rating results are shown in Table 5. Most testers believed that the foundation of this invention has a strong makeup-holding effect and is also quite satisfied with its effect on improving dullness, showing good overall user feedback.

[0099] Table 5: Consumer Survey Scoring Results

[0100]

[0101] In summary, the foundation liquid of this invention reduces the evaporation of volatile oils by employing a composite oil gel; utilizes silica to absorb human body oils; employs a compound of trimethylsiloxysilicate and polymethylsilsesquioxane to enhance the flexibility and integrity of the film; and performs surface treatment on the pigments to achieve "dual-repellent" properties, reducing makeup smudging caused by sweat and oil. Through the combined effect of these four aspects, the occurrence of foundation liquid darkening is effectively reduced, thus exhibiting a significant effect in improving dullness.

[0102] The above description of the embodiments is intended to enable those skilled in the art to understand and apply this application. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, this application is not limited to the embodiments described herein, and any improvements and modifications made by those skilled in the art based on the disclosure of this application without departing from the scope and spirit of this application are within the scope of this application.

Claims

1. A foundation liquid with a significant effect on improving dullness, characterized in that, The foundation contains the following components by weight percentage: 15% compound oleogel 3% silica Trimethylsilyloxysilicate 3.6% Polymethylsilsesquioxane 2.4% Surface treatment pigment 12.7% PEG-10 polydimethylsiloxane 2% Lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane 1% 5% glycerin Butylene glycol 1% Distearate, lithium dimethylammonium montmorillonite, 0.5% Sodium chloride 0.5% 8% polydimethylsiloxane Isohexadecane 2% Phenoxyethanol 0.7% Caprylyl glycol 0.2% Ethylhexylglycerin 0.1% The remainder is water; The composite oil gel, by mass percentage of the foundation liquid, consists of: 6% isododecane, 3% caprylic / capric triglycerides, 0.5% sucrose laurate, 0.3% sucrose stearate, and 0.2% sucrose palmitate; the remainder is glycerin. The silica is a porous silica with an oil absorption value of 250 ml / 100 g and an average particle size of 9.0 µm.

2. The foundation liquid according to claim 1, characterized in that, The surface-treated pigment, by weight percentage, comprises the following components: 8-10% titanium dioxide, 0.2-0.4% perfluorooctyltriethoxysilane, 0.1-0.2% hydrogenated lecithin, 0.2-0.4% iron oxide red, 0.1-0.2% iron oxide black, and 1.0-1.5% iron oxide yellow.

3. The method for preparing the foundation liquid according to claim 1, characterized in that, Includes the following steps: S1: Preparation of the oil phase: After adding a film-forming agent to the moisturizing oil and stirring to dissolve it, add functional powder, surface treatment color powder, emulsifier and thickener, then add composite oleogel, heat to 70-80℃, stir evenly, and homogenize at low speed until completely dispersed to obtain the oil phase; the moisturizing oil is polydimethylsiloxane and isohexadecane, the film-forming agent is trimethylsiloxysilicate and polymethylsilsesquioxane, the functional powder is silica, the emulsifier is lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane and PEG-10 polydimethylsiloxane, and the thickener is distearate dimethylammonium lithium montmorillonite; S2: Preparation of the aqueous phase: Add the polyol and stabilizer to water, heat to 70-80℃, stir to dissolve, and maintain the temperature for 20-30 minutes to obtain the aqueous phase; the polyol is butanediol and glycerol, and the stabilizer is sodium chloride. S3: Emulsification: Start homogenization, slowly add the aqueous phase from step S2 to the oil phase from step S1, stir until uniformly mixed, cool to 40-45℃, add preservatives and stir evenly to obtain foundation liquid, wherein the preservatives are phenoxyethanol, octyl glycol and ethylhexylglycerin.

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