Aqueous powder liquid as well as preparation method and application thereof

Abstract

The invention relates to the technical field of cosmetics, and particularly discloses water type powder liquid as well as a preparation method and application thereof. The aqueous powder liquid is prepared by mixing xanthan gum, fumed silica, a zwitterionic polymer, a humectant, oil absorption powder, a preservative and water, the physical stability of an aqueous powder liquid system is remarkably improved by utilizing the synergistic effect of the xanthan gum, the fumed silica and the zwitterionic polymer, and the long-acting water-oil balance effect is achieved; and the use skin feeling is comprehensively improved. When the water-based powder liquid provided by the invention is applied to a make-up product, the make-up product can effectively make up and control oil and has moisturizing capacity, and the safety of the make-up product in the use process is improved; the problems that an existing makeup fixing product easily causes skin dryness and is difficult to moisturize during makeup fixing and oil control, the skin feeling is poor, and safety risks exist during use are solved.

Description

Technical Field

[0001] This application relates to the field of cosmetic technology, and in particular to an aqueous powder liquid, its preparation method, and its application. Background Technology

[0002] Traditional cosmetic systems can be divided into two main categories based on their physical form: solid powder (pressed powder, loose powder) and liquid film-forming (setting spray). The two types of products differ significantly in their mechanisms of action and formulation structures, but both have significant technical drawbacks.

[0003] Solid powder products, represented by pressed powder (a ternary composite system of powder, binder, and moisturizing oil) and loose powder (a high-proportion powder dispersion system), rely on the physical adsorption of epidermal lipids by the powder for their makeup setting mechanism. Due to the high proportion of high-density powder in their formulas, these products are prone to causing epidermal hydration imbalance: on the one hand, excessive adsorption of moisture from the stratum corneum by the powder exacerbates transepidermal water loss (TEWL), weakening the skin barrier function, manifesting as dryness, flaking, makeup settling into fine lines, and mechanical caking; on the other hand, for dry skin groups, the competitive binding of absorbent oil-controlling ingredients with epidermal moisture may exacerbate skin tightness and the risk of barrier damage. Although introducing moisturizing oils can partially alleviate epidermal water loss, this strategy is negatively correlated with the oil-absorbing efficiency of the powder, essentially presenting a contradiction between moisturizing needs and oil-controlling efficacy. Furthermore, the respiratory exposure risk caused by powder dust also poses a potential health hazard. Liquid film-forming products primarily utilize spray systems containing high-molecular-weight film-forming polymers, achieving makeup fixation through interfacial film formation. This system faces three major technical bottlenecks: First, the mismatch between solvent evaporation kinetics and film-forming rate prolongs the duration of interfacial adhesion, leading to a sticky, wet feel and the risk of makeup displacement. Second, low-viscosity liquid carriers struggle to stably suspend functional oil-absorbing powders, resulting in significantly lower oil-control efficiency compared to solid systems. Third, the uncontrollable droplet size and spray diffusion range during atomization can easily cause contact with the mucous membranes around the eyes and respiratory tract, and the irritant nature of the ethanol solvent in the formulation may exacerbate local discomfort.

[0004] The current cosmetics market exhibits a coexistence of solid-state adsorption and liquid-state film-forming technologies. However, both are constrained by inherent formulation logic: solid systems struggle to overcome the antagonistic relationship between oil absorption efficiency and epidermal moisturization, while liquid systems are hampered by the contradiction between rheological properties and film-forming kinetics. These technological limitations directly lead to significant deficiencies in existing products regarding makeup longevity, skin compatibility, and safety, necessitating breakthroughs through innovative dosage form design and interdisciplinary technological integration. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a water-based powder liquid, its preparation method and application, to solve the problems of existing makeup setting products, such as difficulty in achieving both oil control and makeup setting effects and moisturizing needs, poor skin feel, and potential safety risks.

[0006] To achieve the above-mentioned technical objectives, this application provides an aqueous powder solution comprising the following components by mass percentage:

[0007] Xanthan gum 0.1%–0.5%;

[0008] Fumed silica 0.02%–2%;

[0009] Amphoteric polymers: 0.01%–3%;

[0010] Moisturizer 6%–15%;

[0011] Oil-absorbing powder: 10%–25%;

[0012] Preservatives: 0.1%–2%;

[0013] The remainder is water.

[0014] Furthermore, the aqueous powder solution comprises the following components by mass percentage:

[0015] Xanthan gum 0.2%–0.5%;

[0016] Fumed silica 0.02%–0.6%;

[0017] Amphoteric polymers 0.01%–1%;

[0018] Moisturizer 6%–15%;

[0019] Oil-absorbing powder: 10%–25%;

[0020] Preservatives: 0.1%–2%;

[0021] The remainder is water.

[0022] Furthermore, the specific surface area of ​​fumed silica is 175–225 m². 2 / g.

[0023] Furthermore, the zwitterionic polymer includes at least one of polyphosphocholine glycol acrylate, polysulfonate betaine, and polycarboxylate betaine.

[0024] Furthermore, the moisturizer includes at least one of glycerin, propylene glycol, butylene glycol, dipropylene glycol, 1,2-pentanediol, and 1,2-hexanediol.

[0025] Furthermore, the oil-absorbing powder includes at least one of polymethyl methacrylate, methyl methacrylate crosspolymer, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, silica, synthetic fluorophlogopite, mica, talc, boron nitride, zinc oxide, aluminum hydroxide, and kaolin.

[0026] Furthermore, the preservatives include at least one of chlorphenesin, phenoxyethanol, ethylhexylglycerin, and benzyl alcohol.

[0027] This application provides a method for preparing an aqueous powder solution, comprising the following steps:

[0028] Step S1: Mix xanthan gum, zwitterionic polymer, humectant, and water, heat to 60-80°C, and mix evenly to obtain the first mixture;

[0029] Step S2: After the first mixture cools to 25-50°C, add fumed silica and oil-absorbing powder, mix evenly, and obtain the second mixture;

[0030] Step S3: After the second mixture cools to room temperature, add the preservative and mix well to obtain an aqueous powder solution.

[0031] This application provides an application of an aqueous powder solution for the preparation of cosmetics.

[0032] This application provides a setting product prepared using the above-mentioned water-based powder liquid.

[0033] In summary, this application provides an aqueous powder solution prepared by mixing xanthan gum, fumed silica, zwitterionic polymer, humectant, oil-absorbing powder, preservative, and water. This application utilizes the synergistic effect between xanthan gum, fumed silica, and zwitterionic polymer to significantly improve the stability of the aqueous powder solution system, achieving a long-lasting water-oil balance effect and comprehensively improving the skin feel of the aqueous powder solution. Furthermore, applying the aqueous powder solution provided by this application to cosmetics can effectively reduce the risk of inhalation during product use, thus improving the safety of cosmetics.

[0034] Compared with existing technologies, the water-based powder solution provided in this application has multiple advantages, including stability, water-oil balance, excellent skin feel, and high safety. Detailed Implementation

[0035] The technical solutions of this application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0036] The raw materials used in this invention are not particularly restricted in their source; they can be purchased from the market or prepared using conventional methods known to those skilled in the art.

[0037] This application provides an aqueous powder solution comprising the following components by mass percentage:

[0038] Xanthan gum 0.1%–0.5%;

[0039] Fumed silica 0.02%–2%;

[0040] Amphoteric polymers: 0.01%–3%;

[0041] Moisturizer 6%–15%;

[0042] Oil-absorbing powder: 10%–25%;

[0043] Preservatives: 0.1%–2%;

[0044] The remainder is water.

[0045] It should be noted that xanthan gum molecules can form a three-dimensional network structure through cross-linking in aqueous solutions, giving aqueous powder solutions excellent powder suspension capabilities. In the presence of fumed silica, xanthan gum will interpenetrate with fumed silica in solution to form an interpenetrating network. The hydroxyl groups on its molecular chains also bond with the silanol groups on the surface of fumed silica through hydrogen bonds, further enhancing the stability and suspension capabilities of the aqueous powder solution. Furthermore, fumed silica not only possesses excellent oil-controlling capabilities but also, due to its high specific surface area, adsorbs zwitterionic polymers, synergistically with xanthan gum to stably suspend large amounts of oil-absorbing powder in low-viscosity systems, and forms a protective film on the skin surface to inhibit moisture evaporation and achieve water retention. These three synergistic effects ultimately achieve long-term stability and water-oil balance in aqueous powder solutions.

[0046] In some preferred embodiments, the aqueous powder solution comprises the following components by weight percentage:

[0047] Xanthan gum 0.2%–0.5%;

[0048] Fumed silica 0.02%–0.6%;

[0049] Amphoteric polymers 0.01%–1%;

[0050] Moisturizer 6%–15%;

[0051] Oil-absorbing powder: 10%–25%;

[0052] Preservatives: 0.1%–2%;

[0053] The remainder is water.

[0054] In some embodiments, the specific surface area of ​​fumed silica is 175–225 m². 2 / g.

[0055] In some embodiments, the zwitterionic polymer includes at least one of polyphosphocholine glycol acrylate, polysulfonate betaine, and polycarboxylate betaine.

[0056] In some embodiments, the humectant includes at least one selected from glycerin, propylene glycol, butylene glycol, dipropylene glycol, 1,2-pentanediol, and 1,2-hexanediol.

[0057] In some embodiments, the oil-absorbing powder includes at least one of polymethyl methacrylate, methyl methacrylate crosspolymer, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer, silica, synthetic fluorophlogopite, mica, talc, boron nitride, zinc oxide, aluminum hydroxide, and kaolin.

[0058] In some embodiments, the preservative includes at least one of chlorphenesin, phenoxyethanol, ethylhexylglycerin, and benzyl alcohol.

[0059] This application provides a method for preparing an aqueous powder solution, comprising the following steps:

[0060] Step S1: Mix xanthan gum, polyphosphocholine glycol acrylate, humectant, and water, heat to 60-80°C, mix evenly, and obtain the first mixture;

[0061] Step S2: After the first mixture cools to 25-50°C, add fumed silica and oil-absorbing powder, mix evenly, and obtain the second mixture;

[0062] Step S3: After the second mixture cools to room temperature, add the preservative and mix well to obtain an aqueous powder solution.

[0063] This application provides an application of an aqueous powder-liquid mixture for the preparation of cosmetics.

[0064] This application provides a setting product prepared using the above-mentioned water-based powder liquid.

[0065] It should be noted that, compared with traditional setting products, the water-based powder liquid provided by this invention effectively overcomes the shortcomings of traditional products while achieving the effect of setting makeup and controlling oil: traditional pressed powder and loose powder can easily cause skin dryness after setting makeup, thus aggravating skin dryness and easily leading to phenomena such as powder floating and caking. In addition, traditional pressed powder and loose powder have the safety hazard of powder overflowing during use and being inhaled; traditional setting spray is not good at controlling oil and setting makeup, and is wet and sticky with slow film formation, also posing a risk of inhalation of the spray during use.

[0066] The applicant further provides the following specific embodiments to describe the present invention. It should be noted that these embodiments are merely descriptive and do not limit the present invention in any way.

[0067] Example 1

[0068] This embodiment provides a water-based cushion compact, which is prepared from a water-based powder solution.

[0069] The components of the aqueous powder solution and their mass percentages in the aqueous powder solution are as follows:

[0070] Xanthan gum 0.5%; Fumed silica 0.02% (CAS No.: 7631-86-9 / 112945-52-5 / 60676-86-0; Specific surface area 200±25m²) 2 / g); 0.5% zwitterionic polymer, specifically polyphosphocholine glycol acrylate (Shanghai Aoli Industrial Co., Ltd. Cellpolypid® 4100); 15% humectant, including 11% butylene glycol, 1% 1,2-hexanediol, and 3% glycerin; 16.4% oil-absorbing powder, including 12% polymethyl methacrylate, 1% polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer (Dow DOWSIL™ EP-9801), and 3.4% vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane crosspolymer (Shin-Etsu KSP-100W); 0.8% preservative, including 0.2% chlorophenoxyethanol and 0.6% phenoxyethanol; the balance is made up to 100% with deionized water.

[0071] This embodiment also provides a method for preparing a water-based cushion compact, including the following steps:

[0072] Step S1: Mix xanthan gum, zwitterionic polymer, humectant, and water, heat to 80°C, keep warm and stir for 30 minutes until homogeneous to obtain the first mixture;

[0073] Step S2: After the first mixture cools to 25-50°C, add fumed silica and oil-absorbing powder, homogenize for 3 minutes, and obtain the second mixture;

[0074] Step S3: After the second mixture cools to room temperature, add the preservative and stir for 10-30 minutes to mix evenly to obtain an aqueous powder solution.

[0075] Step S4: Fill the water-based powder into the cushion box with a sponge to obtain the water-based cushion compact.

[0076] Example 2

[0077] This embodiment provides a water-based cushion compact, which differs from Embodiment 1 in that the specific components of the water-based powder solution and their mass percentages in the water-based powder solution are different, as detailed below:

[0078] Xanthan gum 0.3%; fumed silica 0.2%; zwitterionic polymer 0.1%, specifically polyphosphocholine glycol acrylate; humectant 12%, specifically butylene glycol; oil-absorbing powder 22%, including polymethyl methacrylate 14.6%, synthetic fluorophlogopite (Topy Industries, Ltd., Japan PDM-10L) 2%, and silica (AGC Si-Tech Co., Ltd. H-52) 5.4%; preservatives 0.8%, including chlorophenoxyethanol 0.2% and phenoxyethanol 0.6%; the balance is made up to 100% with deionized water.

[0079] Example 3

[0080] This embodiment provides a water-based cushion compact, which differs from Embodiment 1 in that the specific components of the water-based powder solution and their mass percentages in the water-based powder solution are different, as detailed below:

[0081] Xanthan gum 0.2%; fumed silica 0.5%; zwitterionic polymer 0.01%, specifically polyphosphocholine glycol acrylate; humectant 12%, specifically 1,2-pentanediol; oil-absorbing powder 13%, including polymethyl methacrylate crosspolymer (Korea Advanced Chemical SUNPMMA-S) 10%, kaolin 2%, HDI / trimethylolhexyl lactone crosspolymer (Japan Nikko Plastic Powder D-400) 1.0%; preservatives 0.8%, including chlorphenesin 0.2% and phenoxyethanol 0.6%; the balance is made up to 100% with deionized water.

[0082] Comparative Example 1

[0083] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of carrageenan is used instead of xanthan gum.

[0084] Comparative Example 2

[0085] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of carrageenan is used instead of xanthan gum.

[0086] Comparative Example 3

[0087] This comparative example provides a water-based cushion compact, which differs from Example 1 in that the amount of xanthan gum added is 0%, and it is made up with an equal amount of deionized water.

[0088] Comparative Example 4

[0089] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of carboxymethyl cellulose is used instead of xanthan gum.

[0090] Comparative Example 5

[0091] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of xanthan gum is replaced with sphagnum molybdenum (Bentone Hydroclay 2000).

[0092] Comparative Example 6

[0093] This comparative example provides a water-based cushion compact, which differs from Example 1 in that it replaces xanthan gum with an equal amount of magnesium aluminum silicate.

[0094] Comparative Example 7

[0095] This comparative example provides a water-based cushion compact, which differs from Example 1 in that the amount of fumed silica added is 0%, and it is made up with an equal amount of deionized water.

[0096] Comparative Example 8

[0097] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of silica (AGCSi-Tech Co., Ltd. H-52) is used instead of fumed silica.

[0098] Comparative Example 9

[0099] This comparative example provides a water-based cushion compact, which differs from Example 1 in that the amount of polyphosphocholine glycol acrylate added is 0%, and is made up with an equal amount of deionized water.

[0100] Comparative Example 10

[0101] This comparative example provides a water-based cushion compact, which differs from Example 1 in that an equal amount of polyquaternium-61 (Nippon Yu Lipidure®-S) is used instead of polyphosphocholine glycol acrylate.

[0102] Comparative Example 11

[0103] This comparative example provides a commercially available pressed powder.

[0104] Comparative Example 12

[0105] This comparative example provides a commercially available setting spray.

[0106] The performance of the aqueous powder liquid or cushion compact prepared in the above embodiments and comparative examples was tested as follows:

[0107] Test 1: Stability Test

[0108] Test methods: The stability of the aqueous powder solutions prepared in Examples 1-3 and Comparative Examples 1-10 was tested. The specific test methods are as follows: 1) The aqueous powder solutions were placed in environments of 45°C, -15°C, and 25°C, and the abnormal phenomena were observed within one month; 2) The aqueous powder solutions were subjected to a cold and hot cycle at -15°C / 45°C for 6 cycles. The specific cycle method was as follows: the aqueous powder solutions were stored at 45°C, 25°C, and -15°C for 24 hours in sequence as one cycle. The heating and cooling rates during the cycle were 0.5°C / min. The abnormal phenomena such as stratification and instability were observed. The test results are shown in Table 1.

[0109] Table 1

[0110]

[0111] Based on the experimental data analysis in Table 1, the aqueous powder solutions prepared in Examples 1-3 all exhibited excellent stability. A comparison of the data from Examples 1-3 with Comparative Examples 1-8 shows that xanthan gum and fumed silica have significant effects on improving the stability and suspension performance of the aqueous powder solutions. When any component is missing from the system, or when other materials are used as substitutes, the stability of the aqueous powder solutions decreases significantly. The mechanism of this synergistic effect is as follows: the hydroxyl functional groups on the xanthan gum molecular chain and the silanol groups on the surface of fumed silica form a non-covalent cross-linked network through hydrogen bonding. This cross-linked network structure increases the cross-linking density between molecular chains in the aqueous powder solution, thereby further enhancing the mechanical strength and shear resistance of the powder system. Simultaneously, fumed silica can effectively fill the pores in the xanthan gum network, forming a "particle-polymer" composite network. This structure not only hinders the Brownian motion and gravitational sedimentation of the powder particles but also significantly reduces the tendency for particle aggregation through steric hindrance, thus constructing a highly efficient and stable powder suspension system.

[0112] Test 2: Makeup Effect Evaluation Test

[0113] Test Method: Thirty-five healthy subjects aged 20-40 years were selected. Fifteen of the selected subjects had oily or combination skin, and the other 20 had dry or combination skin. The subjects were randomly divided into seven groups of five. Each group used the water-based liquid powder provided in Examples 1-3 or the pressed powder or setting spray provided in Comparative Examples 9-12 for makeup effect evaluation. Each subject applied an equal amount of the test sample to both their left and right cheeks. Subjects evaluated the effects during application and 6 hours later, and completed a questionnaire. The average score was calculated, and the skin feel test results are shown in Table 2. Specific scoring criteria are as follows:

[0114] (1) Adhesion: 0-4 points for poor skin adhesion and severe caking and powdering; 4-7 points for average skin adhesion with slight caking and powdering; 7-10 points for good skin adhesion with virtually no caking or powdering.

[0115] (2) Makeup holding power: 0-4 points for obvious color difference on different parts of the face after 3 hours; 4-7 points for obvious color difference on different parts of the face after 6 hours; 7-10 points for no obvious color difference on different parts of the face after 6 hours;

[0116] (3) Oil control: After using water-based liquid powder, pressed powder or setting spray for 3 hours, observe the oil production on the face at a social distance. If a lot of oil is observed, it is 0-4 points; after 6 hours, if a lot of oil appears on the face at a social distance, it is 4-7 points; after 6 hours, if oil begins to appear on the face at a social distance, it is 7-10 points.

[0117] (4) Degree of dryness: 0-4 points for severe tightness and dryness of the skin; 4-7 points for slight tightness and dryness of the skin; 7-10 points for no obvious tightness and dryness of the skin;

[0118] (5) Makeup setting ability: 0-4 points for severe makeup fading and patchiness; 4-7 points for mild makeup fading and patchiness; 7-10 points for no obvious makeup fading and patchiness.

[0119] (6) Makeup effect liking (overall evaluation of the product after use): poor is 0-4 points; average is 4-7 points; good is 7-10 points;

[0120] (7) Stickiness: The sticky and unpleasant feeling on the skin surface during use is severely rated as 0-4 points; the slight stickiness during use with a brief resistance is rated as 4-7 points; the lack of obvious drag and the relatively refreshing feeling during use is rated as 7-10 points.

[0121] Table 2

[0122]

[0123] Based on the data analysis in Table 2, the cushion foundations prepared in Examples 1-3 exhibited excellent setting and oil-control performance while effectively avoiding skin dryness and peeling. They also demonstrated superior adherence, providing a comfortable feel and good skin fit. In contrast, Comparative Examples 9-10 showed significantly lower scores in oil control, setting ability, and makeup-holding ability, accompanied by varying degrees of skin dryness. This result indicates that the absence or replacement of polyphosphocholine glycol acrylate leads to the inability of water-based cushion foundations to achieve a synergistic balance between setting, oil control, and moisturizing performance. The mechanism of this phenomenon may be related to the dual-functionality of polyphosphocholine glycol acrylate—its hydrophilic groups in its molecular structure endow the system with moisturizing capabilities, while through synergistic effects with xanthan gum and fumed silica, it constructs a composite film on the skin surface that combines oil control and makeup setting functions with moisture permeability, thereby avoiding the skin dryness problem commonly found in traditional formulations.

[0124] Further comparison of Examples 1-3 with Comparative Example 11 (commercially available pressed powder) revealed that the cushion foundation prepared by this invention did not show a significant difference in setting ability scores compared to commercially available products. However, it effectively improved the problem of epidermal moisture absorption caused by the excessively high powder density of commercially available pressed powders, significantly reducing the incidence of dry skin and improving the problems of powder settling and caking. Compared with Comparative Example 12 (commercially available setting spray), the water-based cushion foundation of this invention achieved an equivalent setting effect while exhibiting superior oil control scores. It also effectively solved the common defects of commercially available setting sprays, such as insufficient oil control and noticeable stickiness, demonstrating more balanced functional characteristics and user comfort.

[0125] Test 3: Oil Control Ability Test

[0126] Test Method: Forty healthy subjects aged 20-40 years were selected. The subjects had oily or combination skin, and their skin was healthy with no history of skin diseases or allergies. The subjects were randomly divided into 8 groups of 5 people each. In a temperature- and humidity-controlled laboratory (temperature 25℃, humidity 50±5%), the subjects first cleansed their faces with facial cleanser and then sat quietly for 15 minutes. After sitting, three test areas (2 cm × 2 cm) were marked on the subjects' foreheads, and the skin oil content in these areas was recorded at 0h. Subsequently, the water-based liquid powder, pressed powder, or setting spray prepared according to the embodiments and comparative examples of this invention were evenly applied to the marked areas, and the skin oil content was measured at 3h and 6h. In this test, the skin oil content was measured using the Cuotometer MPA580 skin oil testing probe Sebumeter SM815 manufactured by CK GmbH, Germany. Three points were measured at each marked area, and the average value was statistically analyzed. The test results are shown in Table 3.

[0127] Table 3

[0128]

[0129] According to the experimental data in Table 3, the skin oil content of Examples 1-3 was significantly lower than that of the blank control group and Comparative Example 12 (commercially available setting spray) at 3 and 6 hours. At the 6-hour detection point, the skin oil content of Examples 1-3 was not significantly different from that of Comparative Example 11 (commercially available pressed powder). The oil control ability of Comparative Examples 9-10 was significantly lower than that of Examples 1-3. This result verifies the key role of polyphosphocholine glycol acrylate in the oil control system. From the mechanism of action analysis, polyphosphocholine glycol acrylate, xanthan gum, and fumed silica synergistically construct a three-dimensional network structure oil-controlling and setting film on the skin surface. This composite film has a dual function: on the one hand, it uniformly anchors the oil-absorbing powder on the skin surface through physical adsorption, forming a continuous oil adsorption layer; on the other hand, the amphiphilic groups in its molecular structure can be oriented to form an interface layer with the lipophilic end facing outward on the skin surface, effectively preventing the diffusion of sebum secreted by the sebaceous glands to the skin surface. This test also proved that the water-based cushion foundation of the present invention achieves a continuous oil control effect for up to 6 hours, and its oil control ability is significantly better than that of traditional setting sprays and is equivalent to commercially available powder products.

[0130] Test 4: Moisturizing Ability Test

[0131] Test Method: Forty healthy subjects aged 20-40 years with healthy skin and no history of skin diseases or allergies were selected and randomly divided into 8 groups. In a temperature- and humidity-controlled laboratory (temperature 25℃, humidity 50±5%), subjects first cleaned the inner forearm. After cleaning, the forearm to be tested was exposed, and the subjects sat quietly for 30 minutes. During this period, they could not drink water or beverages and should keep their bodies relaxed, avoiding touching the test area. After sitting quietly, a 3 cm × 3 cm area was marked on the inner forearm, and the skin moisture content of the marked area (0 h) was recorded. Subsequently, the water-based liquid powder, pressed powder, or setting spray prepared according to the embodiments and comparative examples of this invention was evenly applied to the marked area, and the skin moisture content of the marked area was tested at 3 h and 6 h. In this test, the skin moisture content was measured using the Cuotometer MPA580 skin moisture test probe Corneometer CM825 manufactured by CK GmbH, Germany. Three points were measured at each marked area, and the average value was statistically analyzed. The test results are shown in Table 4.

[0132] Table 4

[0133]

[0134] Table 4 shows that after using the cushion foundation prepared in Examples 1-3, the skin's moisture content significantly increased, and remained at a high level at both 3 and 6 hours. This indicates that the cushion foundation of the present invention has a long-lasting moisturizing function, maintaining the skin's water-oil balance for an extended period, making it suitable for long-lasting makeup application. The moisturizing ability of Comparative Examples 9-10 was significantly lower than that of Examples 1-3. This difference is attributed to the absence or substitution of polyphosphocholine glycol acrylate, possibly because polyphosphocholine glycol acrylate, through a synergistic effect with xanthan gum, forms a moisture-permeable water-retaining film on the skin surface. The hydrophilic groups in its molecular structure can capture environmental moisture and reduce transepidermal water loss, thereby enhancing the system's moisturizing performance.

[0135] Analysis of the data in Tables 3 and 4 shows that, compared to commercially available setting sprays (Comparative Example 11) and the blank control group, the cushion foundation provided by this invention exhibits a significant advantage in oil control. Compared to commercially available powder foundations (Comparative Example 12), this invention achieves equivalent setting and oil control effects while significantly reducing the incidence of dry skin and flaking. Compared to Comparative Examples 9-10, the cushion foundations provided in Examples 1-3 show significantly better oil control and moisturizing effects than those in Comparative Examples 9-10. This indicates that by utilizing the moisturizing properties of polyphosphocholine glycol acrylate, the synergistic optimization of oil control and moisturizing functions is achieved simultaneously, constructing a composite water-based powder system that combines highly efficient oil control, long-lasting makeup setting, and continuous moisturizing.

[0136] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although this application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water-based powder solution, characterized in that, Includes the following components by mass percentage: Xanthan gum 0.1%–0.5%; Fumed silica 0.02%–2%; Amphoteric polymers: 0.01%–3%; Moisturizer 6%–15%; Oil-absorbing powder: 10%–25%; Preservatives: 0.1%–2%; The remainder is water.

2. The aqueous powder solution according to claim 1, characterized in that: Xanthan gum 0.2%–0.5%; Fumed silica 0.02%–0.6%; Amphoteric polymers 0.01%–1%; Moisturizer 6%–15%; Oil-absorbing powder: 10%–25%; Preservatives: 0.1%–2%; The remainder is water.

3. The aqueous powder solution according to claim 1, characterized in that: The specific surface area of ​​the fumed silica is 175–225 m². 2 / g.

4. The aqueous powder solution according to claim 1, characterized in that: The zwitterionic polymer includes at least one of polyphosphocholine glycol acrylate, polysulfonate betaine, and polycarboxylate betaine.

5. The aqueous powder solution according to claim 1, characterized in that: The moisturizer includes at least one of glycerin, propylene glycol, butylene glycol, dipropylene glycol, 1,2-pentanediol, and 1,2-hexanediol.

6. The aqueous powder solution according to claim 1, characterized in that: The oil-absorbing powder includes at least one of the following: polymethyl methacrylate, methyl methacrylate cross-linked polymer, polydimethylsiloxane / vinyl polydimethylsiloxane cross-linked polymer, vinyl polydimethylsiloxane / polymethylsiloxane sesquisiloxane cross-linked polymer, silica, synthetic fluorophlogopite, mica, talc, boron nitride, zinc oxide, aluminum hydroxide, and kaolin.

7. The aqueous powder solution according to claim 1, characterized in that: The preservative includes at least one of chlorphenesin, phenoxyethanol, ethylhexylglycerin, and benzyl alcohol.

8. A method for preparing an aqueous powder solution according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step S1: Mix xanthan gum, zwitterionic polymer, humectant, and water, heat to 60-80°C, and mix evenly to obtain the first mixture; Step S2: After the first mixture cools to 25-50°C, add fumed silica and oil-absorbing powder, mix evenly, and obtain the second mixture; Step S3: After the second mixture cools to room temperature, add the preservative and mix well to obtain an aqueous powder solution.

9. The application of the aqueous powder solution according to any one of claims 1 to 7, characterized in that, Used in the preparation of cosmetics.

10. A setting product, characterized in that, It is prepared using the aqueous powder solution according to any one of claims 1 to 7.

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