Concealer composition and application thereof

Abstract

The invention relates to the technical field of cosmetics, in particular to a concealer composition and application thereof. The concealer composition comprises the following components: titanium dioxide, silica hyaluronate and a hyaluronic acid elastomer, and the weight ratio of the titanium dioxide to the silica hyaluronate to the hyaluronic acid elastomer in the concealer composition is (0.11-2): (0.11-0.8): (0.01-0.1). The light-sensitive concealing composition has an excellent concealing effect, visually conceals flaws and restrains powder to prevent migration by regulating and controlling optical means and increasing diffuse reflection and red light signals, and meanwhile, gives clear makeup feeling.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and specifically, to a concealer composition and its application. Background Art

[0002] The concealer composition achieves concealer effect by regulating light reflection and scattering. When light acts on the skin, specular reflection and diffuse reflection occur on the surface; after part of the light enters the skin, long-wave red light (>600nm) has strong penetration and a wide light propagation range, so it can enhance the transparency of the skin. Traditional high-concealer formulations rely on high concentrations of color powders (zinc oxide, mica, iron oxide, titanium dioxide) or high-refractive-index particles (titanium white powder) to enhance light scattering, but it is easy to cause a heavy makeup feeling. Modern technologies optimize concealer by combining optical principles: using special powders (such as spherical silica) to form a uniform diffuse reflection layer on the skin surface to blur the boundaries of blemishes; improving the adhesion of powders through a water-in-oil system or film-forming agents to reduce the problems of powder transparency and migration caused by oil dissolution. However, emulsion concealers have limitations: they can only cover superficial red blood streaks, light spots and other mild blemishes, and still need local strengthening with concealer for dark scars, and cannot bring a transparent makeup look; oily skin is prone to destroying the diffuse reflection layer due to sebum secretion, resulting in a decrease in concealer power.

[0003] Chinese invention patent CN113873992B discloses a cosmetic composition, which comprises: (i) microspheres for providing soft-focus benefits, wherein the microspheres comprise at least 50% cellulose by weight of the microspheres; and (ii) 0.5% to 10% by weight of a non-silica hydrophilic inorganic thickener; wherein the refractive index of the microspheres is 1.42 to 1.50. However, this soft-focus composition does not have both a clear feeling and powder migration performance. Summary of the Invention

[0004] In the first aspect of the present invention, a concealer composition is provided, and the components include: titanium dioxide, silica hyaluronate and hyaluronic acid elastomer.

[0005] The weight ratio of the titanium dioxide, silica hyaluronate and hyaluronic acid elastomer is (0.11-2):(0.11-0.8):(0.01-0.1).

[0006] Optionally, the weight ratio of the titanium dioxide, silica hyaluronate and hyaluronic acid elastomer is 1:(0.4-1):(0.05-0.1).

[0007] The present invention has found that a composition composed of titanium dioxide, hyaluronic acid silica and hyaluronic acid elastomer can have the effects of high concealing power, high definition and transparency, high soft focus and low powder migration rate. Specific titanium dioxide can make red light permeable, allowing more red light to enter the skin and then reflect out of the skin from the subcutaneous layer, thereby concealing blemishes, while hyaluronic acid silica can bring water and oil balance to the skin. Hyaluronic acid elastomer has a strong moisturizing effect, increases skin hydration, and assists the entry and internal reflection of red light; in terms of enhancing the soft focus effect, after the silica is modified with hyaluronic acid, the surface pores are partially filled, the oil absorption rate is slowed down, and sustained release and oil control are achieved, thereby avoiding oil secretion and the weakening of diffuse reflection caused by the formation of oil film. The addition of red light permeable titanium dioxide and hyaluronic acid elastomer, in synergy with hyaluronic acid silica, enhances the soft focus effect; in terms of preventing powder migration, the cross-linked network inside the hyaluronic acid elastomer can effectively restrain red light permeable titanium dioxide and hyaluronic acid silica. There may be van der Waals forces between the two, which effectively prevents the migration of powder.

[0008] Optionally, the titanium dioxide is modified with aluminum hydroxide and stearic acid.

[0009] A second aspect of the present invention provides an application of a concealer composition, which is applied to emulsion or liquid foundation.

[0010] The amount of the concealer composition added to the emulsion or liquid foundation is 0.1-8 wt %.

[0011] Optionally, the concealer composition is added in an amount of 0.1-5 wt % in the emulsion.

[0012] Calculated by weight percentage, the components include: 0.1-3% of concealer composition, 4-10% of emulsifier, 18-30% of moisturizer, 0.1-3% of thickener, 0.1-3% of electrolyte, and the balance is made up of water.

[0013] The weight ratio of the emulsifier, emollient and thickener is 1:(2-6):(0.1-0.8).

[0014] Optionally, the weight ratio of the emulsifier, emollient and thickener is 1:(2-5):(0.1-0.4).

[0015] The emollient includes at least one of an organic silicon derivative and an ester compound.

[0016] The emollient includes but is not limited to at least one of polydimethylsiloxane and diisostearyl malate.

[0017] The emulsifier includes, but is not limited to, at least one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, pentaerythritol tetra(bis-tert-butyl hydroxyhydrocinnamate), and polyglyceryl-3 polydimethylsiloxysilylethyl dimethicone.

[0018] The thickener includes, but is not limited to, at least one of behenic acid, cyclopentasiloxane, dimethicone, distearyldimonium hectorite, and propylene carbonate.

[0019] The electrolyte includes at least one of potassium salts, sodium salts, and magnesium salts.

[0020] Optionally, the electrolyte includes, but is not limited to, at least one of magnesium sulfate and sodium chloride.

[0021] The preparation of the emulsion includes the following steps: mixing hyaluronic acid elastomer, electrolyte, and deionized water evenly to obtain an aqueous phase; mixing the remaining components evenly to obtain an oil phase, adding the aqueous phase to the oil phase, and homogenizing and emulsifying.

[0022] Beneficial effects

[0023] 1. The composition composed of titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer can endow the liquid foundation with the effects of high concealer power, high clarity, high soft focus, and low powder migration rate.

[0024] 2. By defining the weight ratio of titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer as (0.11-2):

[0025] (0.11-0.8):(0.01-0.1), it can effectively prevent the influence of sebum secretion and powder migration on the concealer effect.

[0026] 3. The powder liquid prepared by the present invention has excellent stability under centrifugation, high and low temperatures, and normal temperature.

[0027] 4. The composition prepared by the present invention, when added to the liquid foundation, can meet the requirements of stability and achieve

[0028] a high addition of more than 2 wt%.

[0029] 5. The powder liquid prepared by the present invention has excellent concealer effect and can also bring a transparent makeup effect. Description of the drawings

[0030] Figure 1 For the red light transmittance test results (each group was tested 3 times, *p<0.05, **p<0.01, ***p<0.001, compared with Comparative Example 4 and Comparative Example 5; each group was tested 3 times, nsp>0.05, # p<0.05, ## p<0.01,### p < 0.001, compared with Comparative Example 4 and Comparative Example 5).

[0031] Figure 2 For the soft focus effect test results (tested 3 times for each group, *p < 0.05, **p < 0.01, ***p < 0.001). Figure 3 For the sustained-release oil control test results (tested 3 times for each group, ***p < 0.001).

[0032] Figure 4 For the anti-powder migration ability results (tested 3 times for each group, **p < 0.01, ***p < 0.001).

[0033] Figure 5 For the powder migration test images, the three images in the upper row correspond to Examples 1 - 3 from left to right, and the four images in the lower row correspond to Comparative Example 1, Comparative Example 4, Comparative Example 5, and Comparative Example 6 from left to right.

[0034] Figure 6 For the wrinkle concealment effect test results (tested 3 times for each group, ***p < 0.001).

[0035] Figure 7 For the pore concealment effect test results (tested 3 times for each group, ***p < 0.001).

[0036] Figure 8 For the dark circle concealment effect test results (tested 3 times for each group, **p < 0.01, ***p < 0.001).

[0037] Figure 9 For the human efficacy experiment image, Example 4 was applied to the left face and Comparative Example 7 was applied to the right face. Specific embodiments

[0038] Examples 1 - 4, Comparative Examples 1 - 7

[0039] A concealer composition, the components are: titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer.

[0040] An emulsion, containing the concealer composition, by weight percentage, the components are shown in Table 1, where " / " corresponds to zero addition amount:

[0041] Among them, the component grades and manufacturers in Table 1 are shown in Table 2, where the water, magnesium sulfate, and sodium chloride in Table 1 are not limited in source.

[0042] Table 1

[0043]

[0044]

[0045] Table 2

[0046]

[0047]

[0048] For the preparation methods of the emulsions described in Examples 1 - 3 and Comparative Examples 1 - 6, the following steps are taken: As shown in Table 1, the components are divided into three phases: A, C, and D; the A phase and the film - forming agent materials are weighed in, mixed evenly at 75°C, and then homogenized to completely disperse all components to obtain the oil phase for standby; the C phase and the hyaluronic acid elastomer materials are weighed in, stirred evenly at 75°C to obtain the water phase for standby; under stirring, the mixed liquid of the water phase is poured into the mixed liquid of the oil phase, and then homogenized and emulsified for 5 min to completely disperse the materials.

[0049] For the preparation methods of the liquid foundations of Example 4 and Comparative Example 7, the following steps are taken: As shown in Table 1, the components are divided into four phases: A, B, C, and D; the A phase and the film - forming agent materials are weighed in, mixed evenly at 75°C, and then homogenized to completely disperse all components for standby; the color powder is dissolved, made into a color paste, and added to the oil - phase mixture; the C phase and the hyaluronic acid elastomer materials are weighed in, stirred evenly at 75°C for standby; under stirring, the mixed liquid of the water phase is poured into the mixed liquid of the oil phase, and then homogenized and emulsified for 5 min to completely disperse the materials.

[0050] Performance testing methods and results

[0051] 1. Red light (>600 nm) transmittance experiment: Precisely pipette 15 μL of the base liquids of Examples 1 - 3 and Comparative Examples 1 - 5, and evenly coat them on the arm skin. Use CM26DG to emit red light and receive the spectral information reflected from the skin. Red light can penetrate the skin and can travel a certain distance, being reflected from under the skin and received by the instrument. Therefore, in the received reflected spectrum, the stronger the red - light signal, the weaker the red - light absorption rate of the sample, and the stronger the red - light signal that enters and penetrates the skin.

[0052] The test results are as Figure 1As shown, compared with Comparative Examples 4-5, the concealer compositions of Examples 1-3 according to the technical solution of the present invention can bring more red light signals to the skin, have a significant red light reflectance, and the red light reflectance increases with the increase of the composition concentration; and compared with Comparative Examples 1-3, the red light signals received by the instrument in Examples 1-3 are stronger, which proves that the combination of the three components of the light-sensitive concealer composition can synergistically exert effects, bring more red light signals to the skin, and thus conceal flaws. At the same time, we can find that in Comparative Example 1 without adding hyaluronic acid elastomer, less red light signals are received compared with Comparative Examples 2 and 3. The possible reason is that hyaluronic acid elastomer has excellent water replenishing effect, improves the hydration of the skin, and the skin layer can transmit more red light, which also proves the necessity of the combination of the three components.

[0053] 2. Soft-focus effect test: Precisely pipette 15 μL of the base liquids of Examples 1-3 and Comparative Examples 1-5, evenly coat them on the inner side of the arm, and take pictures with Vplus to obtain parallel polarized light (P) images and cross-polarized light (C) images. It is known that parallel polarized light images include specular reflection and diffuse reflection, while cross-polarized light images only include diffuse reflection. The sum of the parallel polarized light image and the cross-polarized light image is equivalent to the total image normally perceived by the human eye.

[0054] Calculate the contribution ratio of specular reflection of each pixel point through the formula Gloss = (P - C) / (P + C). The lower the value, the weaker the specular reflection and the stronger the soft-focus effect, and it is calculated through the following formula:

[0055] Soft-focus effect = (Gloss before applying the sample - Gloss after applying the sample) / (Gloss before applying the sample)

[0056] The test results are as Figure 2 shown. The present invention finds that compared with the traditional concealer compositions of Comparative Examples 4-5, Examples 1-3 have a stronger soft-focus effect, with a significant difference. Further, Examples 1-3 of the most preferred technical solution of the present invention have a better soft-focus effect than Comparative Examples 1-3, which proves that the combination of the three components can synergistically increase the proportion of diffuse reflection, thus bringing a better soft-focus effect for the makeup effect.

[0057] 3. Sustained-release oil control effect: Test examples provide the sustained-release oil control effects of the above Examples 1-3 and Comparative Examples 1-5. It is known that the secretion of oil easily leads to the transparency of the powder, thus exposing flaws. Moreover, the formation of an oil film easily weakens diffuse reflection, reduces the soft-focus feeling of the makeup effect, and the concealer power decreases. The specific operations include:

[0058] Accurately weigh 1 mg of artificial sebum and evenly coat it on the test area on the inner side of the arm. Subsequently, stack 15 μL of the base solution on the test area and spread it evenly. Use Vplus to take pictures to obtain parallel polarized light (P) images and cross-polarized light (C) images. Calculate the contribution ratio of specular reflection of each pixel point through the formula Gloss = (P - C) / (P + C), and calculate through the following formula:

[0059] Soft focus effect = (Gloss before applying the sample - Gloss after applying the sample) / (Gloss before applying the sample)

[0060] The test results are as Figure 3 shown. Comparing Examples 1 to 3 with Comparative Examples 4 to 5, they have better soft focus effects. And as time changes, the soft focus effect still remains at a relatively high value. For the prior art compositions of Comparative Example 4 and Comparative Example 5, the soft focus effect is at a relatively low level before using the oil. After using the oil for 8 hours, the soft focus effect is even worse. This is because an oil film is formed on the skin surface, weakening the diffuse reflection. In the present invention, the silica hyaluronate has excellent sustained-release oil control effect, can effectively prevent the weakening of diffuse reflection after the formation of the oil film, and can maintain the soft focus makeup effect for a long time. At the same time, it also prevents the powder from infiltrating into the oil, resulting in the exposure of flaws.

[0061] 4. Anti-powder migration effect: The test example provides the powder migration effects of the above Examples 1 to 3 and Comparative Examples 1, 4 to 6. The specific operations include:

[0062] Precisely weigh 8 mg of the sample (about 2.0 mg / cm 2 ), evenly coat it on a PMMA plate (the sample area is 2×2 cm). After 15 minutes, use a corneofix tape to stick to the powder on the surface of the sample, then use PC35 to take pictures ( Figure 5 ), and use imageJ to analyze the area of the adhered powder. The test results are as Figure 4 shown.

[0063] It is found through the test results ( Figure 4-5) The emulsions of Examples 1 to 3 according to the technical solution of the present invention have a significantly better effect of preventing powder migration compared to the composition of Comparative Example 6 of the prior art, strongly indicating that although the hyaluronic acid elastomer is not a film-forming agent, it has a more significant ability to prevent powder migration, and there is no case of the film-forming agent system collapsing. Similarly, Comparative Example 1 is significantly weaker than Examples 1 - 3. In the absence of the hyaluronic acid elastomer, the migration rate of red light through titanium dioxide and silica hyaluronate increases. The mechanism of restraining the powder may be the generation of van der Waals forces between the red light transmissive titanium dioxide and silica hyaluronate, effectively embedding into the cross-linked network. At the same time, it can be seen from Comparative Examples 4 and 5 that although the hyaluronic acid elastomer is added, due to the lack of interaction, the restraining effect is significantly weaker than that of Examples 1 - 3.

[0064] 5. Stability Test

[0065] Centrifugation Experiment

[0066] Perform high-speed centrifugation treatment (3000 r / min, centrifuge for 20 min) on Examples 1 to 3 and Comparative Examples 1 to 5 using a centrifuge, and observe the layering and precipitation of the samples. The test results are shown in Table 3.

[0067] According to Table 3, after high-speed centrifugation treatment, the stabilities of Examples 1 to 3 are higher than those of Comparative Examples 1 to 5. Severe layering and oil floating phenomena occur in Comparative Example 4 and Comparative Example 5, and a large amount of precipitation appears in Comparative Example 5, indicating that the composition of the present invention has good stability.

[0068] High and Low Temperature Experiment

[0069] Test method: Place equal amounts of Examples 1 to 3 and Comparative Examples 1 to 5 at -10 °C, 45 °C, and room temperature (25 °C) for storage for 2 weeks, and then observe the physical and chemical property changes of the samples.

[0070] (1) Color stability: Test the color change of the samples over storage time to ensure that the color is uniform and not easily faded.

[0071] (2) Texture stability: Evaluate the texture characteristics of the test samples such as fluidity and viscosity to ensure that the texture remains unchanged during storage and use, without layering, caking, etc.

[0072] (3) Appearance stability: Observe the appearance changes of the test samples during storage, such as whether there are bubbles, precipitates, or suspended substances.

[0073] According to Table 4, after high and low temperature treatment, the stabilities of Examples 1 to 3 are higher than those of Comparative Examples 1 to 5. Layering and oil floating phenomena occur in Comparative Example 4 and Comparative Example 5. Comparative Example 5 not only shows severe layering and oil floating phenomena but also a large amount of precipitation, indicating that the composition of the present invention has good stability in high and low temperature environments.

[0074] 6. Human efficacy experiment: The test example provides the tests of the above-mentioned Example 4 and Comparative Example 7 in the population. The specific operations include:

[0075] Select 10 young people (aged 18 to 40, regardless of skin type). After normal skin care, apply the foundation of Example 4 and Comparative Example 7 on the left and right cheeks for trial use (the usage amount is kept consistent, about 0.5 g / time). Immediately and 4 hours later, the technician operates the Vplus instrument to measure the relevant basic value indicators of the test sites of the subjects (face, Figure 9 ).

[0076] It is found through the test results ( Figure 6-7 ) that the foundation containing Example 4 according to the technical solution of the present invention has a significant effect of covering pores, wrinkles and dark circles compared with the foundation containing Comparative Example 7 in the prior art, indicating that the addition of the present invention to the emulsion can strongly exert the optical concealer effect, while the prior art composition Comparative Example 7 has poor immediate covering effect and basically no concealer effect at 4 hours.

[0077] Figure 8 As can be seen, after applying Example 4, the facial fine lines and pores are significantly improved, while after using Comparative Example 7, the pores and fine lines that are not covered remain on the face. After 4 hours, Comparative Example 7 has no covering effect, and the generation of the oil film strengthens the exposure and highlights the facial flaws. However, Example 4 still maintains a certain covering effect and no oil film is generated, and the interaction of the composition stabilizes the concealer effect.

[0078] Table 3

[0079] Sample Appearance Example 1 No oil bleeding and no precipitation Example 2 No oil bleeding and no precipitation Example 3 No oil bleeding and no precipitation Comparative Example 1 Slight oil bleeding and no precipitation Comparative Example 2 Slight oil bleeding and no precipitation Comparative Example 3 Slight oil bleeding and no precipitation Comparative Example 4 Considerable oil bleeding and a small amount of precipitation Comparative Example 5 Considerable oil bleeding and a large amount of precipitation

[0080] Table 4

[0081]

Claims

1. A concealer composition, characterized in that, The components include: titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer.

2. The concealer composition according to claim 1, wherein The weight ratio of the titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer is (0.11 - 2):(0.11 - 0.8):(0.01 - 0.1).

3. The concealer composition according to claim 2, wherein The weight ratio of the titanium dioxide, silica hyaluronate, and hyaluronic acid elastomer is 1:(0.4 - 1):(0.05 - 0.1).

4. The concealer composition according to claim 3, wherein The titanium dioxide is modified with aluminum hydroxide and stearic acid.

5. Use of the concealer composition according to any one of claims 1-4, characterized in that, It is applied to emulsions or liquid foundations.

6. Use of the concealer composition according to claim 5, characterized in that, The addition amount of the concealer composition in the emulsion or liquid foundation is 0.1 - 8 wt%.

7. Use of the concealer composition according to claim 6, characterized in that, By weight percentage, the components include: 0.1 - 3% of the concealer composition, 4 - 10% of the emulsifier, 18 - 30% of the emollient, 0.1 - 3% of the thickener, 0.1 - 3% of the electrolyte, and the balance is made up with water.

8. Use of the concealer composition according to claim 7, characterized in that, The weight ratio of the emulsifier, emollient, and thickener is 1:(2 - 6):(0.1 - 0.8).

9. Use of the concealer composition according to claim 8, characterized in that, The weight ratio of the emulsifier, emollient, and thickener is 1:(2 - 5):(0.1 - 0.4).

10. Use of the concealer composition according to claim 7, characterized in that, The emollient includes at least one of silicone derivatives and ester compounds.

Images