Sweat-resistant liquid foundation and preparation method thereof

Abstract

The present application discloses a sweat-resistant liquid foundation and a preparation method thereof, wherein the liquid foundation comprises the following raw materials in weight percentage: film former: 3-10%; emollient: 8.5-42%; moisturizer: 3.5-15%; filler: 0.5-5%; emulsifier: 1-10%; skin conditioner: 0.7-21%; viscosity modifier: 0.1-2%; stabilizer: 0.2-6%; chelating agent: 0.001-0.5%; colorant: 0-40%; preservative: 0-1%; the film former adopts acrylate / polydimethylsiloxane copolymer and cyclopentasiloxane in a mass ratio of 1-3:2-5. The liquid foundation of the present application has excellent waterproof and sweat-resistant performance and good beauty and skin care effects.

Description

Technical Field

[0001] The present application relates to the field of cosmetics, and in particular to a sweat-resistant liquid foundation and a preparation method thereof. Background Art

[0002] Liquid foundation is an emulsion-type cosmetic with powder added. On the one hand, it can be used for facial beauty modification, forming a smooth covering layer on the skin surface and effectively covering facial blemishes; on the other hand, it can be combined with skin care ingredients to achieve the effect of beauty and skin care.

[0003] Most foundation liquids on the market use hydrophilic raw materials, especially hydrophilic film-forming materials, which make the foundation liquid light and non-greasy, and easy to spread on the skin surface. However, the hydrophilicity of the foundation liquid leads to poor water and sweat resistance, and it is easy to come off when exposed to water. Summary of the invention

[0004] In order to improve the water-proof and sweat-resistant performance of liquid foundation and reduce the makeup removal phenomenon, the present application provides a sweat-resistant liquid foundation and a preparation method thereof.

[0005] In a first aspect, the present application provides a sweat-resistant liquid foundation, which comprises the following raw materials in percentage by weight:

[0006] Film former: 3-10%;

[0007] Emollients: 8.5-42%;

[0008] Moisturizer: 3.5-15%;

[0009] Filler: 0.5-5%;

[0010] Emulsifier: 1-10%;

[0011] Skin conditioning agent: 0.7-21%;

[0012] Viscosity regulator: 0.1-2%;

[0013] Stabilizer: 0.2-6%;

[0014] Chelating agent: 0.001~0.5%;

[0015] Colorant: 0-40%;

[0016] Preservatives: 0-1%;

[0017] The film-forming agent is an acrylate / polydimethylsiloxane copolymer and cyclopentasiloxane in a mass ratio of 1-3:2-5.

[0018] Conventional liquid foundation usually uses hydrophilic substances such as xanthan gum, carbomer, cellulose, etc. as film-forming agents, resulting in poor performance of the liquid foundation after film formation. Therefore, the liquid foundation of the present application uses a film-forming agent based on acrylate / polydimethylsiloxane copolymer, which contains both hydrophilic acrylate segments and hydrophobic silicone segments, which can effectively improve the performance of the liquid foundation, and after forming a film on the skin surface, it is not easy to be removed by sweat.

[0019] The above-mentioned acrylate / polydimethylsiloxane copolymer has a high viscosity, which greatly reduces the fluidity of the foundation liquid and is not conducive to dispersed coating. For this reason, the present application uses cyclopentasiloxane for compounding, which effectively compensates for its fluidity and improves the uniformity of the foundation liquid film.

[0020] This application has no special requirements for colorants, and suitable pigments or pigment solutions can be selected as needed.

[0021] Preferably, the emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane and PEG-10 polydimethylsiloxane in a mass ratio of 0.5-5:0.5-5.

[0022] The introduction of hydrophobic segments in the film-forming agent improves the performance, but also blocks the penetration of hydrophilic skin conditioners and emollients to the skin to a certain extent, affecting the skin care effect of the foundation. The emulsifier used in this application contains a hydrophobic polysiloxane segment and a hydrophilic polyether segment, which can promote the release of skin conditioners, emollients and water from the hydrophobic film layer and penetrate into the skin surface, and with the release of hydrophilic substances, channels can be formed on the film layer, further promoting the release of skin conditioners and water, and ensuring a good skin care effect.

[0023] In addition, the above-mentioned cetyl PEG / PPG-10 / 1 polydimethicone and PEG-10 polydimethicone have a synergistic effect. PEG-10 polydimethicone has good permeability to the membrane layer, which is beneficial to the formation of channels, while cetyl PEG / PPG-10 / 1 polydimethicone has a strong steric hindrance, which is beneficial to normal expansion and promotes the penetration of skin conditioners, emollients and moisture to the skin surface.

[0024] Preferably, the water phase stabilizer is selected from one or a combination of agarose, xanthan gum, hydroxyethyl cellulose, and carbomer; the oil phase stabilizer is selected from one or a combination of quaternary ammonium salt-18 hectorite and quaternary ammonium salt-18 bentonite. More preferably, the water phase stabilizer is agarose, and the oil phase stabilizer is quaternary ammonium salt-18 hectorite.

[0025] The above stabilizers can form a network structure in the system, play a thickening role, reduce precipitation and stratification, and improve the stability of the product.

[0026] Preferably, the stabilizer comprises a water phase stabilizer and an oil phase stabilizer in a mass ratio of 0.1-3:0.1-3, and the water phase stabilizer and the oil phase stabilizer are agarose and quaternary ammonium salt-18 hectorite, respectively.

[0027] Quaternary ammonium salt-18 hectorite is lipophilic and can play a good stabilizing role in oil phase solution, while agarose contains a large number of hydroxyl groups and can swell into colloid in aqueous solution, playing a stabilizing role. After the oil phase and aqueous phase are mixed, the hydroxyl groups in agarose can form hydrogen bonds with the carbonyl or silanol groups of the acrylate / polydimethylsiloxane copolymer, playing a stabilizing role and effectively reducing the possibility of separation of silicone oils such as cyclopentasiloxane, thus ensuring the film-forming stability of the foundation liquid.

[0028] Preferably, the moisturizing agent is butylene glycol and glycerin in a mass ratio of 0.5-5:3-10.

[0029] The above moisturizers are all small molecule compounds with outstanding permeability, which can quickly pass through the foundation film layer and act on the skin to retain water and moisturize. At the same time, they can promote the formation of the aforementioned hydrophilic channels and improve the beauty and skin care effects of the foundation.

[0030] Preferably, the filler is selected from one or a combination of kaolin, bentonite, talc, and aluminum hydroxide; more preferably, mica or a suspension thereof is used.

[0031] Preferably, the skin conditioning agent is selected from one or a combination of Laminaria digitata extract, Lithoclase spurred extract, Fucus vesiculosus extract, Laminaria japonica extract, Laminaria elongata extract, Ulva salsa extract, and Chondrus crispus extract.

[0032] The above-mentioned plant extracts contain natural pigments and antioxidants, which can inhibit skin peroxidation, regulate and repair skin defects, and have the effect of delaying aging, preventing wrinkles and anti-aging.

[0033] Preferably, the viscosity modifier is an inorganic salt such as sodium chloride or ammonium chloride, and more preferably sodium chloride.

[0034] In a second aspect, the present application provides a method for preparing a sweat-resistant liquid foundation, comprising the following steps:

[0035] Preparation of oil phase: Under heating conditions, film former, emollient, preservative, emulsifier and 10-90wt% of stabilizer are mixed evenly to obtain an emulsion; a portion of the emulsion is mixed evenly with filler and colorant, and the oil phase solution is obtained after grinding, and kept warm for later use;

[0036] Preparation of aqueous phase: under heating conditions, add the moisturizer, viscosity regulator and chelating agent into water, dissolve and mix evenly to obtain an aqueous phase solution;

[0037] Finished product preparation: the aqueous phase solution and the oil phase solution are mixed, homogenized and emulsified, and vacuumed to obtain a sweat-resistant liquid foundation;

[0038] Preferably, the heating temperature is 70-85°C;

[0039] Preferably, the rotation speed of the homogenization and emulsification is 2500-3000 rpm, and the time of the homogenization and emulsification is 5-10 minutes.

[0040] Through the above preparation process, a homogeneous and stable liquid foundation can be obtained, which has good beauty and skin care effects. At the same time, the emulsion is easy to spread and effectively ensures the uniformity of the makeup surface.

[0041] In summary, this application has the following beneficial effects:

[0042] 1. The present application adopts a composite of acrylate / polydimethylsiloxane copolymer and cyclopentasiloxane as a film-forming agent for liquid foundation, which can significantly improve the performance of liquid foundation while ensuring its smearability and spreading performance.

[0043] 2. The emulsifier of the present application adopts cetyl PEG / PPG-10 / 1 polydimethylsiloxane and PEG-10 polydimethylsiloxane for synergistic cooperation. While playing the role of emulsification and homogenization, it can form a channel structure on the foundation film layer, compensate for the passage rate of hydrophilic substances in the film layer, promote the penetration of hydrophilic substances such as skin conditioners and emollients into the skin surface, and ensure its beauty and skin care effect.

[0044] 3. The stabilizer of the present application is agarose and quaternary ammonium salt-18 hectorite, which can play a good role in resisting precipitation stratification and preventing silicone oil segregation, and ensure the stability of film formation and storage of liquid foundation. DETAILED DESCRIPTION

[0045] Example

[0046] Embodiment 1, a kind of sweat-resistant liquid foundation, is prepared according to the following method:

[0047] Preparation of oil phase: Under heating conditions, add acrylic acid (ester) / polydimethylsiloxane copolymer, cyclopentasiloxane film former, emollient, preservative, emulsifier and quaternary ammonium salt-18 hectorite into an emulsifier, stir and heat to 80±2°C, stir evenly to obtain an emulsion; take 40wt% of the emulsion and mix it evenly with the filler and colorant, grind it and mix it evenly with the remaining emulsion in an emulsifier to obtain an oil phase solution, and keep it warm at 78±2°C for standby use;

[0048] Preparation of water phase: put the moisturizer, viscosity modifier, chelating agent and water into a water phase pot, stir and heat to 70-85°C, dissolve and stir evenly to obtain a water phase solution;

[0049] Finished product preparation: Add the aqueous phase solution into an emulsifying pot and mix with the oil phase solution, homogenize and emulsify at 2500 rpm for 8 minutes, and then vacuum the material to obtain the sweat-resistant liquid foundation.

[0050] Embodiment 2, a kind of sweat-resistant liquid foundation, is prepared according to the following method:

[0051] Preparation of oil phase: Under heating conditions, add acrylic acid (ester) / polydimethylsiloxane copolymer, cyclopentasiloxane film former, emollient, preservative, emulsifier and quaternary ammonium salt-18 hectorite into an emulsifying pot, stir and heat to 82±2°C, stir evenly to obtain an emulsion; take 30wt% of the emulsion and mix it evenly with the filler and colorant, grind it and mix it evenly with the remaining emulsion in an emulsifying pot to obtain an oil phase solution, and keep it warm at 78±2°C for use;

[0052] Preparation of water phase: put the moisturizer, viscosity modifier, chelating agent and water into a water phase pot, stir and heat to 70-85°C, dissolve and stir evenly to obtain a water phase solution;

[0053] Finished product preparation: Add the aqueous phase solution into an emulsifying pot and mix it with the oil phase solution, homogenize and emulsify at 2500 rpm for 10 minutes, and then vacuum the material to obtain the sweat-resistant liquid foundation.

[0054] Embodiment 3, a kind of sweat-resistant liquid foundation, is prepared according to the following method:

[0055] Preparation of oil phase: Under heating conditions, add acrylic acid (ester) / polydimethylsiloxane copolymer, cyclopentasiloxane film former, emollient, preservative, emulsifier and quaternary ammonium salt-18 hectorite into an emulsifier, stir and heat to 75±2°C, stir evenly to obtain an emulsion; take 50wt% of the emulsion and mix it evenly with the filler and colorant, grind it and mix it evenly with the remaining emulsion in an emulsifier to obtain an oil phase solution, keep it warm at 78±2°C for use;

[0056] Preparation of water phase: put the moisturizer, viscosity modifier, chelating agent and water into a water phase pot, stir and heat to 70-85°C, dissolve and stir evenly to obtain a water phase solution;

[0057] Finished product preparation: Add the aqueous phase solution into an emulsifying pot and mix it with the oil phase solution, homogenize and emulsify at 3000 rpm for 5 minutes, and then vacuum the material to obtain the sweat-resistant liquid foundation.

[0058] Table 1, Examples 1-3 Raw material ratios

[0059]

[0060]

[0061] Example 4 is a sweat-resistant liquid foundation, which is different from Example 1 in that an equal amount of cetyl PEG / PPG-10 / 1 polydimethylsiloxane is used in the emulsifier to replace PEG-10 polydimethylsiloxane.

[0062] Example 5, a sweat-resistant liquid foundation, is different from Example 1 in that, in the emulsifier, an equal amount of PEG-10 polydimethylsiloxane is used to replace cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

[0063] Example 6, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of PEG / PPG-8 / 3 laurate is used in the emulsifier to replace PEG-10 polydimethylsiloxane and cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

[0064] Example 7, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of cetyl dimethicone is used in the emulsifier to replace PEG-10 dimethicone and cetyl PEG / PPG-10 / 1 dimethicone.

[0065] Example 8, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of carbomer is used in place of agarose in the stabilizer.

[0066] Example 9, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of quaternary ammonium salt-18 bentonite is used in the stabilizer to replace quaternary ammonium salt-18 hectorite.

[0067] Example 10, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of glycerol is used to replace butylene glycol in the moisturizing agent.

[0068] Example 11, a sweat-resistant liquid foundation, is different from Example 1 in that an equal amount of butylene glycol is used in place of glycerin in the moisturizing agent.

[0069] Example 12, a sweat-resistant liquid foundation, is different from Example 1 in that equal amounts of polyethylene glycol-4 are used in the moisturizer to replace butylene glycol and glycerin.

[0070] Comparative Example

[0071] Comparative Example 1 is a sweat-resistant liquid foundation, which is different from Example 1 in that an equal amount of acrylates / polydimethylsiloxane is used in the film-forming agent to replace cyclopentasiloxane.

[0072] Comparative Example 2 is a sweat-resistant liquid foundation, which is different from Example 1 in that an equal amount of cyclopentasiloxane is used in the film-forming agent to replace acrylates / polydimethylsiloxane.

[0073] Comparative Example 3, a liquid foundation, with a total weight of 100 kg, includes the following components and their corresponding masses:

[0074] Dispersant: including 3.8 kg of cetyl polydimethylsiloxane, 1.3 kg of polyethylene; 0.3 kg of quaternary ammonium salt-18 bentonite; 6 kg of colorant; 2.2 kg of bismuth hydroxide; 4 kg of emollient; thickener: including 5 kg of carbomer (2% aqueous solution), 5 kg of xanthan gum (2% aqueous solution); conditioner: including 0.2 kg of custard apple extract, 3.6 kg of glycosphingolipids, 0.22 kg of peony root extract, 3 kg of glycerin, 3 kg of 1,3-butylene glycol; preservatives include 1 kg of caprylyl glycol; 59.38 kg of water.

[0075] And the liquid foundation is prepared by the following steps:

[0076] S1: Weigh and mix quaternary ammonium salt-18 bentonite, emollient and cetyl polydimethylsiloxane, and homogenize at a stirring speed of 6000 r / min for 5 minutes; add colorant, and homogenize at a stirring speed of 6000 r / min for 5 minutes; then add polyethylene and bismuth oxychloride, heat to 80° C. and keep warm to obtain mixture A;

[0077] S2: weigh and mix the thickener, conditioner, preservative and water, heat to 80° C., and stir for 2 h at a stirring speed of 800 r / min to obtain a mixture B;

[0078] S3: Add mixture A into mixture B, and stir for 10 seconds at a stirring speed of 800 r / min to obtain a liquid foundation.

[0079] Performance testing

[0080] 1. Test of waterproof and sweat-resistant performance and smearing and dispersion performance of liquid foundation

[0081] Female subjects aged 18-35 years old who were healthy and had no history of allergies were selected. They were asked to wash their faces with the same mild facial cleanser and dry them. Then they were applied with the same toner and patted for complete absorption. Finally, foundation makeup was applied. Each group of test subjects consisted of 3 subjects, and 3 makeup artists with 3-5 years of professional experience applied makeup.

[0082] Waterproof and sweat-resistant performance: After applying makeup, the subjects need to exercise on a treadmill in an indoor environment of 30°C and 50RH%, with a treadmill speed of 6-8㎞ / h and a single running time of 5-10min; rest for 20-30min after running, and use a spray bottle to evenly spray water on the face to wet the makeup during the rest period, with a spray volume of 10-20ml each time, and dry naturally. Repeat the above running and water spraying operations 5 times, observe whether the foundation liquid is removed and record the number of times the experiment is performed when the makeup is removed. The average value of the three samples is the test result, which is recorded as the number of waterproof and sweat-resistant tests (times).

[0083] Spreadability and dispersion performance: After applying makeup, the makeup artist needs to score the spreadability and dispersion performance (smoothness) and surface uniformity of the liquid foundation on a scale of 1-5, with 1 being the worst and 5 being the best. The average of the three samples is the test result.

[0084] 2. Liquid foundation beauty and skin care performance test

[0085] Female subjects aged 30-45 years old with no history of allergies were selected to apply makeup using the above-mentioned liquid foundation samples. There were 3 subjects in each group of samples, and the use time was 1 month. Each time, the face was washed and dried with the same mild facial cleanser, and then the same toner was applied, patted to absorb completely, and finally the foundation was applied. No other skin care products were used during the test period. Before and after the end of the test, facial photos were taken with the same camera and the same light and lens parameters. Professional beauticians scored the changes in facial wrinkles before and after use, with a score of 1-5. The higher the score, the more obvious the reduction of facial wrinkles or skin repair effect.

[0086] 3. Liquid foundation stability test

[0087] Take 75 ml of the sample from each group of foundation liquid just prepared and put it into a transparent glass bottle, then place it in an oven at 45°C for 1 hour, take it out and observe whether there is precipitation and oil-water stratification.

[0088] Table 2. Experimental results

[0089]

[0090] Experimental results analysis:

[0091] (1) Combining Examples 1 to 12 and Comparative Example 3 with Table 2, it can be seen that compared with the use of conventional hydrophilic film-forming agents or thickeners, the present application can significantly improve the waterproof and sweat-resistant properties of the liquid foundation and improve its makeup-lasting performance by using acrylate / polydimethylsiloxane copolymers and cyclopentasiloxane. Combining Example 1 with Comparative Examples 1 to 2 with Table 2, it can be seen that cyclopentasiloxane can effectively compensate for the decrease in fluidity caused by the use of acrylate / polydimethylsiloxane copolymers, thereby improving the smoothness and makeup uniformity of the sweat-resistant liquid foundation.

[0092] (2) Combining Example 1 with Examples 4 to 7 and Table 2, it can be seen that the present application can significantly improve the problem of decreased hydrophilic substance permeability caused by the introduction of organic silicon hydrophobic segments in the film-forming agent by using cetyl PEG / PPG-10 / 1 polydimethylsiloxane and PEG-10 polydimethylsiloxane as emulsifiers, promote the permeability of skin care ingredients such as skin conditioners, emollients, moisturizers, and ensure the beauty and skin care effects of liquid foundation. The combination of the two is more conducive to expanding the hydrophilic channel, promoting effective skin care ingredients to pass through the film layer and act on the skin.

[0093] (3) It can be seen from the combination of Example 1 and Example 8 to 9 and Table 2 that the present application can inhibit the emulsion precipitation in the liquid foundation or the separation and stratification of silicone oil components such as cyclopentasiloxane by using agarose and quaternary ammonium salt-18 hectorite as water phase and oil phase stabilizers respectively. The reason may be that while the above two stabilizers have conventional thickening and viscosity stabilizing effects, the quaternary ammonium salt-18 hectorite also has a silicon-oxygen-silicon segment and has good affinity with silicone oil. The hydroxyl group in agarose can form a hydrogen bond with the carbonyl group or silicon hydroxyl group of the acrylate / polydimethylsiloxane copolymer, which plays a stabilizing role, thereby effectively reducing the possibility of separation of silicone oils such as cyclopentasiloxane, and ensuring the film-forming stability of the liquid foundation.

[0094] (4) Combining Example 1 with Examples 10 to 12 and Table 2, it can be seen that compared with polyethylene glycol-4, the present application uses glycerol and butylene glycol as moisturizers, which helps to ensure the beauty and skin care effects of the liquid foundation. Because glycerol and butylene glycol have outstanding permeability, they have good permeability in the liquid foundation film layer and can effectively promote the diffusion of substances such as skin conditioners. However, macromolecular moisturizers such as polyethylene glycol-4 or sodium hyaluronate have poor effects.

[0095] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A sweat-resistant liquid foundation, characterized in that: Contains the following raw materials in weight percentage: Film former: 3-10%; Emollients: 19.157-42%; Moisturizer: 3.5-15%; Filler: 0.5-5%; Emulsifier: 1-10%; Skin conditioning agent: 0.7-21%; Viscosity regulator: 0.1-2%; Stabilizer: 0.2~6%; Chelating agent: 0.001~0.5%; Colorant: 0-40%; Preservatives: 0-1%; The film-forming agent is an acrylate / polydimethylsiloxane copolymer and cyclopentasiloxane in a mass ratio of 1.8:4.2; The emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane and PEG-10 polydimethylsiloxane in a mass ratio of 0.5-5:0.5-5; The stabilizer is a water phase stabilizer and an oil phase stabilizer in a mass ratio of 0.1-3:0.1-3, wherein the water phase stabilizer and the oil phase stabilizer are agarose and quaternary ammonium salt-18 hectorite respectively; The moisturizing agent is butylene glycol and glycerin in a mass ratio of 0.5-5:3-10; The skin conditioning agent is selected from one or a combination of Laminaria palmata extract, Lithoclade spurredum extract, Fucus vesiculosus extract, Laminaria japonica extract, Laminaria elongata extract, Ulva salsa extract, Chondrus crispus extract; The emollient is selected from a combination of caprylic / capric triglyceride, dicaprylyl carbonate, isododecane, polydimethylsiloxane, hydrogenated polydecene, and cetyl ethylhexanoate; The viscosity modifier is sodium chloride.

2. A sweat-resistant liquid foundation according to claim 1, characterized in that: The filler is mica or its suspension.

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