A single-element aerosol foundation spray

Abstract

This invention belongs to the field of new materials for daily chemical products and discloses a single-component aerosol foundation spray, comprising a propellant and a water-in-oil emulsion. The total weight of the water-in-oil emulsion is 100 wt%, and the emulsion contains the following components: dipropylene glycol 6-8 wt%; 1,2-hexanediol 0.6-1 wt%; isomeric oligosaccharides 2-3 wt%; trimethylsiloxysilicate 1.5-2 wt%; VP / hexadecene copolymer 1.5-2.5 wt%; dual-terminated vinyl polyether silicone oil 0.5-0.7 wt%; inorganic salt content less than 0.2 wt%; and an appropriate amount of emulsifier. The single-component aerosol foundation spray of this invention has comprehensive advantages such as smooth spraying, excellent low-temperature stability, and superior film-forming effect.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products, and more particularly to a single-element aerosol foundation spray. Background Technology

[0002] Current spray-type foundation makeup products mostly use DME or HFO propellants, resulting in relatively high VOC content; binary packaging is costly and the production line is complex. Uni-component aerosols have the advantages of low cost and fast filling speed, but since the aerosol material is in direct contact with LPG, the following problems exist:

[0003] Low-boiling-point hydrocarbons cause "instantaneous cooling upon ejection - water phase freezing" to clog the valve cup;

[0004] High hydrocarbon swelling—silicone resin film-forming agents are easily extracted into the gas phase, causing nozzle coking;

[0005] LPG has low solubility in common acrylate film-forming agents and is prone to stratification and precipitation.

[0006] Foundation spray products, while requiring excellent film-forming properties, also need some powder ingredients to enhance the foundation's coverage and smoothness. These characteristics further exacerbate the aforementioned problems.

[0007] Based on the cost advantage of single-aerosol products, the technical problem to be solved by this application is: how to improve the film-forming effect while avoiding clogging of foundation spray products during the spraying process. Summary of the Invention

[0008] The purpose of this invention is to provide a single-aerosol foundation spray. This spray uses dipropylene glycol and 1,2-hexanediol to lower the freezing point, uses isomer oligosaccharides to replace sodium hyaluronate to avoid spray clogging of the valve cup at low temperatures, and uses trimethylsiloxysilicate, VP / hexadecene copolymer as film-forming materials and dual-terminated vinyl polyether silicone oil as crosslinking materials. It first pre-crosslinks to form an MQ elastic network, and then coats VP-16 to achieve film formation at room temperature for 18 seconds and resistance to sebum. The single-aerosol foundation spray of this invention has comprehensive advantages such as smooth spraying, good low-temperature stability, and excellent film-forming effect.

[0009] To achieve the above objectives, this application discloses:

[0010] A single-aerosol foundation spray includes a propellant and a water-in-oil emulsion;

[0011] With a total weight of 100 wt% for the water-in-oil emulsion, the water-in-oil emulsion contains the following components:

[0012] Dipropylene glycol 6~8wt%;

[0013] 1,2-Hexanediol 0.6~1wt%;

[0014] 2-3 wt% of isomer oligosaccharides

[0015] Trimethylsiloxane silicate 1.5~2 wt%;

[0016] VP / hexadecene copolymer 1.5~2.5wt%;

[0017] Double-ended vinyl polyether silicone oil 0.5~0.7wt%;

[0018] Inorganic salt content is less than 0.2 wt%;

[0019] Use an appropriate amount of emulsifier.

[0020] In traditional single-aerosol liquid foundation sprays, sodium hyaluronate is commonly used as a moisturizer, and different film-forming agents are combined to improve the film-forming effect. However, this moisturizing and film-forming strategy is contradictory and will aggravate the clogging of the nozzle during continuous spraying. At the same time, traditional single-aerosol liquid foundation sprays will also experience problems such as poor spraying effect and poor film-forming effect after continuous low-temperature storage. One of the main reasons for this problem is that the freeze-thaw stability deteriorates under low-temperature conditions, and the film-forming agent, powder and other materials separate into layers.

[0021] To solve this problem, the present invention adopts the following measures:

[0022] 1. By using dipropylene glycol and 1,2-hexanediol in combination, the freezing point can be lowered and freeze-thaw stability can be improved.

[0023] 2. By using dipropylene glycol and isomer oligosaccharides to replace the original sodium hyaluronate moisturizer, the isomer oligosaccharides have a good moisturizing effect and do not clog the nozzle;

[0024] 3. The film-forming agent is trimethylsiloxysilicate, VP / hexadecene copolymer, and double-ended vinyl polyether silicone oil is used as a crosslinking agent. First, pre-crosslinking is used to form an MQ elastic network, and then VP-16 is coated to achieve film formation at room temperature for 18 seconds and resistance to sebum.

[0025] Meanwhile, the above-mentioned film-forming agent will not cause nozzle coking. More importantly, the film-forming agent of the present invention can maintain excellent freeze-thaw stability under the low-temperature resistance of dipropylene glycol and 1,2-hexanediol, further reducing the risk of nozzle clogging.

[0026] 4. This invention is a low-salt formula that prevents both particle deposition and low-temperature salting out.

[0027] In summary, this invention achieves smooth spraying from multiple angles, including improving low-temperature freeze-thaw stability, preventing nozzle caking and clogging, lowering the freezing point of water, and reducing inorganic salt precipitation. At the same time, by optimizing the film-forming agent, it achieves a better film-forming effect.

[0028] In the aforementioned single-aerosol foundation spray, the water-in-oil emulsion further includes the following components:

[0029] 12-17 wt% of cyclopentadimethylsiloxane;

[0030] Isonononyl isononanoate 4~6wt%;

[0031] Titanium dioxide 3.5~4.5 wt%;

[0032] Mica 0.8~1.2wt%;

[0033] Hexagonal boron nitride 0.5~0.7wt%;

[0034] Fragrance, preservatives, chelating agents, and coloring powder in appropriate amounts;

[0035] The remaining water.

[0036] In the above-mentioned single-aerosol foundation spray, the preservative is p-hydroxyacetophenone, and the chelating agent is EDTA-2Na.

[0037] In the above-mentioned single-aerosol foundation spray, the emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane or PEG-10 polydimethylsiloxane;

[0038] The amount of the cetyl PEG / PPG-10 / 1 polydimethylsiloxane used is 2~3 wt%;

[0039] The amount of PEG-10 polydimethylsiloxane used is 0.8~1.3wt%.

[0040] In the aforementioned single-aerosol foundation spray, the propellant is a mixture of propane and butane.

[0041] The propellant selected in this invention is A-46 grade propane / butane, with a filling temperature of 12-15 ℃ and an internal pressure of 0.55-0.60 MPa, which remains stable as a single phase even when in direct contact with the material.

[0042] In the above-mentioned single-aerosol foundation spray, the mass ratio of the propellant to the water-in-oil emulsion is 3:7.

[0043] This application has at least the following beneficial effects:

[0044] This invention achieves smooth spraying from multiple angles, including improved low-temperature freeze-thaw stability, prevention of nozzle caking and clogging, lowering the freezing point of water, and reducing inorganic salt precipitation. Simultaneously, through the optimal selection of film-forming agents, it achieves superior film-forming effects. The single-aerosol foundation spray of this invention possesses comprehensive advantages such as smooth spraying, excellent low-temperature stability, and outstanding film-forming effect. Detailed Implementation

[0045] The present invention will now be clearly and completely described in conjunction with embodiments thereof. It should be noted that, unless otherwise specified in the embodiments, conditions are performed under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products. Unless otherwise specified, all parts used in the embodiments of the present invention are parts by weight.

[0046] I. Explanation of Raw Material Sources

[0047] The properties of the raw materials for this invention are shown in Table 1.

[0048] Table 1 Raw Material List

[0049] name use 1 dipropylene glycol Antifreeze and moisturize 2 Pentavitine® 72h moisturizing 3 1,2-Hexanediol Corrosion prevention and ice reduction 4 p-Hydroxyacetophenone Anti-corrosion 5 NaCl Particle size stability 6 EDTA-2Na Chelation 7 Cyclopentadimethylsiloxane Volatile carriers 8 Isononyl isononanoate Soft 9 Trimethylsilyloxysilicate Film-forming skeleton 10 VP / hexadecene copolymer Film-forming agent 11 Double-ended vinyl polyether silicone oil Crosslinking 12 Titanium dioxide Concealer 13 mica Soft focus 14 Hexagonal boron nitride Instant brightening 15 essence Odor Improvement 16 Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane emulsifier 17 PEG-10 polydimethylsiloxane emulsifier

[0050] II. Preparation of a single-element aerosol foundation spray

[0051] One-element aerosol foundation spray includes the preparation and filling of water-in-oil emulsion;

[0052] The preparation method of water-in-oil emulsion is as follows:

[0053] 1. Weigh the materials: Weigh each of the raw materials to be used and set them aside.

[0054] 2. First, add the raw materials, including cyclopentamethoxysiloxane, isononyl isononanoate, trimethylsiloxysilicate, VP / hexadecene copolymer, dual-terminated vinyl polyether silicone oil, mica, boron nitride, emulsifier, and other oil phase components, to the main pot and start the stirrer at 50-80 rpm. For titanium dioxide and color powder, separate an appropriate amount of oil and grind the color powder several times until there are no particles. Then add it to the main emulsification pot and start heating to 80-85℃. Homogenize for 3-5 minutes and set aside.

[0055] 3. At room temperature, add deionized water, dipropylene glycol, 1,2-hexanediol, p-hydroxyacetophenone, NaCl, and EDTA-2Na to the aqueous phase pot in sequence, stir and heat to 80-85 ℃, keep warm for 10 min to completely dissolve NaCl, and obtain a transparent and homogeneous aqueous phase. Stir evenly and homogenize for 3-5 minutes.

[0056] 4. Then, while stirring, slowly pump the aqueous phase mixture into the oil phase pot of the main pot. After pumping, homogenize for 3-5 minutes and keep warm for 15-30 minutes.

[0057] 5. Begin cooling. When the temperature drops to 45°C, add the raw materials Pentavitine® and flavoring, and stir well.

[0058] 6. Take samples for testing. After passing the test, discharge the material and let it stand for 48 hours before filling it as required.

[0059] The filling method is as follows: fill in the semi-finished product, cover the valve, fill in the gas, install the nozzle, cover the bottle, weigh, package after passing the quality test, plasticize, pack into boxes, sample and inspect, and put into storage.

[0060] The weight ratio of emulsion to LPG (liquefied petroleum gas) is approximately 3:7.

[0061] All subsequent cases were filled according to this ratio.

[0062] The formulations of water-in-oil emulsions are shown in Table 2 below:

[0063] Table 2 Formulation Table Unit: wt%

[0064] raw material Example 1 Example 2 Example 3 Example 4 Example 5 1 Deionized water to 100 to 100 to 100 to 100 to 100 2 dipropylene glycol 7 6 8 7 7 3 Pentavitine® 2.5 2 1 2.5 2.5 4 1,2-Hexanediol 0.8 0.6 3 0.8 0.8 5 p-Hydroxyacetophenone 0.5 0.5 0.5 0.5 0.5 6 NaCl 0.15 0.15 0.15 0.15 0.15 7 EDTA-2Na 0.1 0.1 0.1 0.1 0.1 8 Cyclopentadimethylsiloxane 15 15 15 15 15 9 Isononyl isononanoate 5 5 5 5 5 10 Trimethylsilyloxysilicate 1.8 1.8 1.8 1.5 2 11 VP / hexadecene copolymer 2 2 2 1.5 2 12 Double-ended vinyl polyether silicone oil 0.6 0.6 0.6 0.5 0.7 13 Titanium dioxide 4 4 4 4 4 14 mica 1 1 1 1 1 15 Hexagonal boron nitride 0.6 0.6 0.6 0.6 0.6 16 essence 0.05 0.05 0.05 0.05 0.05 17 Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane 2.5 2.5 2.5 2.5 2.5 18 PEG-10 polydimethylsiloxane 1 1 1 1 1 19 Pigment Iron Red 0.4 0.4 0.4 0.4 0.4 20 Pigment Iron Yellow 0.9 0.9 0.9 0.9 0.9 21 Pigment Iron Black 0.1 0.1 0.1 0.1 0.1

[0065] Comparative Example 1

[0066] The method is largely the same as in Example 1, except that dipropylene glycol is replaced by glycerin at the same weight.

[0067] Comparative Example 2

[0068] The method is largely the same as in Example 1, except that dipropylene glycol is replaced by diglycerides in equal weight.

[0069] Comparative Example 3

[0070] It is largely the same as Example 1, except that 1,2-hexanediol is replaced by 1,2-pentanediol in equal weight.

[0071] Comparative Example 4

[0072] The method is largely the same as in Example 1, except that Pentavitine® is replaced by sorbitol at a weight ratio.

[0073] Comparative Example 5

[0074] The method is largely the same as in Example 1, except that Pentavitine® is replaced by sodium hyaluronate (molecular weight: 800 Daltons) at the same weight.

[0075] Comparative Example 6

[0076] The method is largely the same as in Example 1, except that the amount of VP / hexadecene copolymer is adjusted to 0 and the amount of trimethylsiloxysilicate is adjusted to 10 wt%.

[0077] Comparative Example 7

[0078] The method is largely the same as in Example 1, except that the amount of double-ended vinyl polyether silicone oil is adjusted to 0, and the missing part is made up with water to make up 100%.

[0079] Comparative Example 8

[0080] The method is largely the same as in Example 1, except that the film-forming agent and the film-forming skeleton are replaced by equal weights of methylpropyl MTQ silicone resin and polypropyl silsesquioxane.

[0081] Performance testing

[0082] I. Freeze-thaw stability of water-in-oil emulsions

[0083] 1. Instruments

[0084] Electric thermostatic chamber: 0-60 ℃, accuracy ±1 ℃; Household refrigerator or low temperature chamber: down to 0 ℃, accuracy ±1 ℃; Electronic balance: 0.01 g (for measuring leakage and spray rate); Thermometer: -50 ℃~50 ℃, scale division 1 ℃ (for temperature calibration); One sheet of white A4 printing paper (for observing fog patterns); Timer / Mobile phone stopwatch.

[0085] 2. Sample preparation

[0086] Take 3 cans of the finished product from each batch and fill them completely. Leave them at room temperature (25 ℃) for 24 hours to allow the internal pressure to equalize. Weigh the total weight and record it as m0 (accurate to 0.01 g).

[0087] 3. Heat resistance test (50 ℃, 4 h)

[0088] a. Set the temperature control chamber to 50 ℃, and after it stabilizes, place the sample inside and start timing.

[0089] b. Remove after 4 hours, wipe dry, and weigh m1.

[0090] c. Calculate the leakage rate = (m0 - m1) / m0 × 100%, which should be ≤ 0.5%.

[0091] d. Warm up to 25 ℃ for 30 min, press for 3 s, and spray the mist onto A4 paper: - The mist should be uniform and free of large droplets (>1 mm droplets ≤ 3 droplets);

[0092] e. The spray is smooth and unobstructed.

[0093] 4. Cold resistance test (0 ℃, 24 h)

[0094] a. Set the refrigerator to 0 ℃, place the sample intact inside, and remove it after 24 hours.

[0095] b. Reheat to 25 ℃ for 30 min, then weigh again (m2).

[0096] c. Ejection rate = (m0 - m2) / m0 × 100%, required to be ≥ 98%.

[0097] d. Similarly, the paper spray test showed that the fog pattern and color were consistent with the room temperature sample, with no layering or ice crystals.

[0098] 5. Hot and cold circulation (3 cycles)

[0099] The same incubator and refrigerator can be used, eliminating the need for manual moving:

[0100] ① A constant temperature chamber at 50 ℃ for 4 hours;

[0101] ② Transition to room temperature at 25℃ for 30 min;

[0102] ③ A refrigerator that operates at -18±2℃ for 4 hours;

[0103] ④ Transition to room temperature at 25℃ for 30 min;

[0104] Repeat steps ①→④ 3 times to complete 3 cycles.

[0105] After the loop ends:

[0106] The final weight (m3) shows a leakage rate of ≤0.5%.

[0107] The final spray pattern, odor, and color of the paper were consistent with the initial sample, and there was no clogging.

[0108] 6. Qualification Criteria (All 3 cans meet the requirements)

[0109] After recovery, compare the following items with 0d:

[0110] Appearance: No layering, no sedimentation, no "cannot spray" or blockage;

[0111] Odor: No rancidity or off-odor;

[0112] Spraying status: Continuous spraying for 3 seconds, uniform mist pattern, no large droplets;

[0113] Internal pressure: conforms to the nominal value (measured by the water bath method of GB / T144495.5.1, no continuous bubbles).

[0114] All three cans passed the heat and cold resistance test.

[0115] II. Spray Test of One-Element Aerosol Foundation Spray After Freeze-Thaw Cycle

[0116] Instant spray

[0117] 1. Instruments

[0118] Constant temperature water bath: 25℃±1℃;

[0119] Stopwatch: Accuracy 0.2s;

[0120] Support: Fix the can vertically, with the nozzle 10cm away from the absorbent paper;

[0121] 2. Steps

[0122] a) Take 3 cans of sample and place them in a 25℃ water bath for 30 minutes;

[0123] b) Dry the container immediately after removing it, and keep it vertically fixed;

[0124] c) Press the valve and start the stopwatch at the same time. Stop the stopwatch the instant the front end of the fog beam reaches the absorption paper and record the time t.

[0125] d) Measure once for each can, and the average value of 3 cans is the "timely spraying time".

[0126] 3.Judgment

[0127] For foundation liquid aerosol, a time of t≤1.0s is considered acceptable; a time >1.0s is considered a valve start-up delay, requiring adjustment of the valve stem spring or orifice diameter.

[0128] Continuous spray

[0129] 1. Instruments

[0130] Electronic balance: accuracy 0.01g, with windproof cover;

[0131] Constant temperature water bath: 25℃±1℃;

[0132] Stopwatch;

[0133] 2. Steps

[0134] a) The sample was kept at the same temperature for 30 minutes;

[0135] b) Weigh the entire can, m0;

[0136] c) Vertically spray continuously for 5 seconds (GB / T14449 specifies: 3 seconds for net content ≤400mL, 5 seconds for >400mL), immediately wipe the outer wall of the nozzle clean, and weigh the mass m1;

[0137] d) Calculate the average ejection velocity over 5 seconds: v = (m0 – m1) / 5(gs) -1 );

[0138] e) Measure again after 30 seconds in the same container, for a total of 3 measurements, to obtain v1, v2, and v3.

[0139] 3. Judgment

[0140] The relative deviation of continuous spraying ≤ 10% is considered qualified:

[0141] (max{v1, v2, v3} – min{v1, v2, v3}) / average v ≤ 0.10;

[0142] Excessive deviation indicates that there is a phenomenon of "insufficient liquid supply" in the valve core or straw, and it is necessary to check the internal pressure, viscosity or straw length.

[0143] Sensory test method after freeze-thaw:

[0144] Take the one-component aerosol liquid foundation spray after heat-resistant and cold-resistant (including -18 °C) treatment, bring it back to 25 °C and warm it for 30 minutes, shake it well, spray it on the back of the left hand for 3 seconds after spraying, and compare whether there are changes in appearance, emulsion texture, and color with the standard sample that has not been tested; gently pat it evenly with the index finger and middle finger of the right hand in a circular motion, and compare the skin feeling and film-forming state with the standard sample after it dries. The score ranges from 1 to 10, and the higher the score, the better the sensory evaluation.

[0145] III. Film-forming effect after spraying

[0146] Test method: Minimalist "tissue wiping method"

[0147] 1. Spray

[0148] Spray the liquid foundation spray on the same position of the arm, spread it out to make it more evenly adhere to the skin;

[0149] 2. Wait for it to dry

[0150] Let it stand at room temperature for 5 minutes (the film has dried completely).

[0151] 3. Wipe

[0152] Gently wipe the film surface once with a single-layer white tissue (or cotton pad) (strength: natural finger sliding).

[0153] Judgment: If there is no visible color residue on the tissue, it is "qualified for film formation"; if there is an obvious foundation color, it is unqualified.

[0154] There is no color transfer when wiping with the tissue, and the film formation is qualified.

[0155] The test results refer to Table 3 (Test Methods 1 and 2) and Table 4 (Test Method 3);

[0156] Table 3 Test Results 1 (Test Methods 1 and 2)

[0157] freeze-thaw stability Immediate spraying after freeze-thaw cycle Continuous spraying after freeze-thaw cycle Sensory test scores after freeze-thaw Example 1 normal normal normal 8.2 points Example 2 normal normal normal 8.3 points Example 3 normal normal normal 8.7 points Example 4 normal normal normal 8.5 points Example 5 normal normal normal 9 points Comparative Example 1 normal normal Uneven spraying 7.5 points Comparative Example 2 normal normal normal 7.8 points, slightly sticky to the touch. Comparative Example 3 normal normal normal 7.5 points, the cold-resistant material has a slightly rough texture against the skin. Comparative Example 4 normal normal normal 7 points, moisturizing, frost-resistant and cold-resistant, slightly rough texture. Comparative Example 5 normal normal normal 7.2 points Comparative Example 6 normal normal Stuck and stopped 4 points, feels thick and sticky. Comparative Example 7 normal normal discontinuous 6 points Comparative Example 8 normal normal Occasionally there is lag. 6 / 10, average skin feel, average film formation.

[0158] Table 4 Test Results 2 (Test Method 3)

[0159] Original weight Weight after 1 spray Weight after 2 sprays Weight after 3 sprays Adhesion Sensory test scores Example 1 98.63g 80.93g 63.34g 46.84g normal 9 points Comparative Example 1 98.63g 80.76g 63.52g 47.25g normal 8 / 10, slightly sticky to the skin Comparative Example 2 98.63g 80.83g 62.95g 46.98g normal 8.5 points Comparative Example 3 98.63g 81.53g 64.58g 48.25g normal 8.2 points Comparative Example 4 98.63g 80.65g 63.15g 46.57g normal 7.9 points; moisturizing power is not as good as in Example 1. Comparative Example 5 98.63g 80.81g 64.52g 47.35g normal 7.9 points, slightly sticky Comparative Example 6 98.63g 82.35g 76.52 65.2g Heavy 5 / 5, feels heavy on the skin Comparative Example 7 98.63g 80.63g 64.26g 46.85g normal 6.5 points Comparative Example 8 98.63g 80.51g 63.85g 46.85g normal 7 points

[0160] Results analysis:

[0161] 1. As can be seen from Examples 1 to 5, the formulation of the present invention has excellent results in terms of freeze-thaw stability, spray performance after freeze-thaw, and sensory evaluation.

[0162] 2. In Comparative Example 1, after replacing dipropylene glycol with glycerin by an equal weight, the freeze-thaw performance was acceptable, but the continuous spraying was not uniform. In Comparative Example 2, after replacing dipropylene glycol with diglycerin by an equal weight, the freeze-thaw performance and the uniformity of continuous spraying were acceptable, but the sensory performance was unsatisfactory. In Comparative Example 3, after replacing 1,2-hexanediol with 1,2-pentanediol by an equal weight, the freeze-thaw performance and the uniformity of continuous spraying were acceptable, but the sensory performance was unsatisfactory.

[0163] In addition, the samples from Example 1 were tested on volunteers, and the relevant information is as follows:

[0164] The instruments used in this test are shown in Table 5.

[0165] Table 5. Instruments and reagents used in this experiment

[0166] instrument factory Balance, 0-200g (accurate to 0.1g), pH meter, 5ml disposable dropper, foundation spray sample, magnifying glass, transparent sample bottle. Shanghai Puchun Metrology Instrument Co., Ltd. Shanghai Yidian Scientific Instrument Co., Ltd.

[0167] The testing method is as follows: This foundation spray demonstrates its ability to improve skin film formation, moisturizing, and brightening.

[0168] Ten healthy women aged 18 to 50 were selected as subjects to use this foundation spray under safe conditions, and its film-forming properties were evaluated. Each subject used the same product, followed the experimental requirements to complete the entire 4-week trial, and completed a questionnaire in a timely manner. The product was applied by spraying an appropriate amount evenly onto the arm after cleansing, twice a day, morning and evening. The participants' feelings and changes in their skin were recorded and summarized. Although this experiment was conducted through a questionnaire and has a certain degree of subjectivity, it provides valuable reference for understanding the effects of this foundation spray on brightening dull skin, moisturizing, and promoting a long-lasting makeup film.

[0169] The results of the experiment are shown in Table 6.

[0170] Table 6 Self-evaluation Experiment Results

[0171]

[0172] At week 2, 80% of participants felt their dull skin was alleviated, 80% felt their skin was protected, 80% felt their skin was moisturized and brightened, 80% felt their skin became softer and smoother, 90% felt their makeup lasted longer and formed a film better, 80% felt their skin became more moisturized and brighter, and over 90% felt the product was non-irritating. At week 4, 90% of participants felt their dull skin was alleviated, 80% felt their skin was protected, 90% felt their dull skin was improved, 80% felt their skin became softer and smoother, over 90% felt their skin became more radiant and brighter, and over 90% felt the product was non-irritating.

[0173] Subject self-assessment: After using this foundation spray product, the subject's skin was protected, dull skin was improved, there was no irritation, the skin became more durable and formed a film, the skin became moisturized and brightened, and received deep nourishment and hydration.

[0174] Safety: No adverse skin reactions were observed after using this product's foundation spray for 4 weeks.

[0175] While personal evaluations can be subjective and biased, they still offer some reference value. They demonstrate that this product has a certain effect on improving dull skin. This provides valuable insights for future formula development and application.

[0176] The test results show that most volunteers experienced improved skin hydration and brightening, and over 90% saw improvements in dull skin and a more even skin tone. At the same time, over 90% of volunteers noticed a significant improvement in how well their makeup held up.

[0177] This study is limited to some factory testing items that can be performed in the factory laboratory. Due to limited conditions, it may have some bias and subjectivity. However, it still provides a certain reference for the basic quality specifications of our foundation spray product, which is still very meaningful.

Claims

1. A single-element aerosol foundation spray, characterized in that, Including propellants and water-in-oil emulsions; With a total weight of 100 wt% for the water-in-oil emulsion, the water-in-oil emulsion contains the following components: Dipropylene glycol 6~8wt%; 1,2-Hexanediol 0.6~1wt%; 2-3 wt% of isomer oligosaccharides Trimethylsiloxane silicate 1.5~2 wt%; VP / hexadecene copolymer 1.5~2.5wt%; Double-ended vinyl polyether silicone oil 0.5~0.7wt%; Inorganic salt content is less than 0.2 wt%; Use an appropriate amount of emulsifier.

2. The single-element aerosol foundation spray according to claim 1, characterized in that, The water-in-oil emulsion also includes the following components: 12-17 wt% of cyclopentadimethylsiloxane; Isonononyl isononanoate 4~6wt%; Titanium dioxide 3.5~4.5 wt%; Mica 0.8~1.2wt%; Hexagonal boron nitride 0.5~0.7wt%; Fragrance, preservatives, chelating agents, and coloring powder in appropriate amounts; The remaining water.

3. The single-element aerosol foundation spray according to claim 2, characterized in that, The preservative is p-hydroxyacetophenone, and the chelating agent is EDTA-2Na.

4. The single-element aerosol foundation spray according to claim 1, characterized in that, The emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane or PEG-10 polydimethylsiloxane; The amount of the cetyl PEG / PPG-10 / 1 polydimethylsiloxane used is 2~3 wt%; The amount of PEG-10 polydimethylsiloxane used is 0.8~1.3wt%.

5. The single-element aerosol foundation spray according to claim 1, characterized in that, The propellant is a mixture of propane and butane.

6. The single-element aerosol foundation spray according to claim 5, characterized in that, The mass ratio of the propellant to the water-in-oil emulsion is 3:7.

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