Low-viscosity oil powder phase soft mask powder and double-bin instant mixing type mask

Abstract

The invention discloses low-viscosity oil powder phase soft mask powder and a double-bin ready-to-mix facial mask, the low-viscosity oil powder phase soft mask powder comprises 0.6-3 parts of a suspension stable composition composed of a shea butter bio-emulsifier and PPG-14 butyl ether, the suspension stable composition accounts for 0.6-3 parts of the oil powder phase soft mask powder, the mass ratio of the shea butter bio-emulsifier to the PPG-14 butyl ether is 1: (4-5), and the mass ratio of the suspension stable composition to the PPG-14 butyl ether is 1: (4-5). The shea butter bio-emulsifier is prepared from the following components in percentage by mass: 90% of candida albicans / glucose / rapeseed methyl oleate fermentation product and 10% of shea butter. By adding the suspension stable composition, the membrane powder with the proportion of 30% or above can be stably suspended in an ultralow-viscosity oil phase of 5000-8000 mPa.s, and the industrial problem that conventional low-viscosity system high-load membrane powder is prone to layering is solved.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, and in particular relates to an oil-powder phase soft film powder and a dual-compartment instant-mixing facial mask. Background Technology

[0002] Currently, soft mask powder, as a professional skincare product, occupies an important position in beauty salons and home care due to its excellent adherence and removable integrity. Its basic formula typically consists of alginate, retarder, gelling agent, and various functional fillers. When using it, the user needs to manually mix the powder with a water-based liquid, forming a soft film after application. However, traditional soft mask powder and existing improved products still have a series of inherent drawbacks:

[0003] Firstly, regarding ease of use, traditional powder products rely on manual mixing, which is cumbersome and makes it difficult to ensure uniform powder-liquid mixing. This often results in poor local film formation or dripping, affecting the user experience. To simplify operation, existing technologies attempt to pre-disperse the membrane powder in a liquid to create single-compartment packaging. However, because it is impossible to effectively isolate the active ingredients from the liquid, the product has a short shelf life. Furthermore, the functional components in the membrane powder (such as vitamins and peptides) are easily hydrolyzed or degraded in the liquid phase, making it difficult to maintain their activity.

[0004] Secondly, regarding skin feel and efficacy, while traditional gel systems, represented by alginate, can quickly absorb water and form a film, their film-forming mechanism relies on a cross-linking reaction with calcium ions in the liquid. In actual use, this process may involve secondary absorption of moisture from the skin's surface, resulting in a noticeable dry and tight feeling after film formation, i.e., a "drying" phenomenon, which reduces the comfort of skincare.

[0005] Most importantly, regarding formulation stability, in order to achieve convenient, ready-to-use products, researchers have attempted to suspend high concentrations of film powder (typically exceeding 30%) in the liquid phase. However, the significant density difference between the powder and the liquid phase means that traditional techniques often rely on drastically increasing the system viscosity (e.g., reaching tens of thousands of mPa·s) to achieve long-term stable suspension, resulting in a highly viscous "mud film"-like product. This not only severely slows down the product's application and mixing efficiency on the skin but also makes achieving "high load stability" and "low viscosity and high efficiency" a technical contradiction that is difficult to reconcile in the industry.

[0006] Therefore, how to achieve long-term stable suspension of high-content film powder in a low-viscosity liquid phase without sacrificing efficiency, and how to solve the problems of activity decay and skin dryness, have become technical bottlenecks that urgently need to be overcome in this field. Summary of the Invention

[0007] To overcome the problems in the prior art, the present invention provides a low-viscosity oil-powder phase soft film powder and a dual-compartment instant-mixing mask, which adopts a low-viscosity, high-load oil phase suspension stabilization technology. By adding a suspension stabilizing composition, the film powder with a proportion of more than 30% can be stably suspended in an ultra-low viscosity oil phase of 5000-8000 mPa·s, thus solving the technical problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows: The present invention provides a low viscosity oil-powder phase soft film powder, comprising a suspension stabilizing composition, wherein the suspension stabilizing composition comprises shea butter bio-emulsifier and PPG-14 butyl ether.

[0009] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the mass ratio of shea butter bio-emulsifier to PPG-14 butyl ether in the suspension stabilizing composition is 1:4 to 5.

[0010] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the shea butter bio-emulsifier includes Candida albicans / glucose / methyl rapeseed oil fermentation product and shea butter, wherein the mass ratio of Candida albicans / glucose / methyl rapeseed oil fermentation product and shea butter is 9:1.

[0011] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the suspension stabilizing composition in the oil-powder phase soft film powder is 0.6 to 3 parts by mass.

[0012] As an optional implementation, the oil-powder phase soft film powder provided by the present invention further includes the following components in parts by weight: 3-20 parts of powder substrate, 3-10 parts of sodium alginate, 6-20 parts of calcium ion crosslinking agent, 2-15 parts of suspending agent, 1-7 parts of emulsifier, and the balance being 25-84.4 parts of oil.

[0013] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the viscosity of the oil-powder phase soft film powder after standing for 24 hours at 25°C is 5000-8000 mPa·s.

[0014] As an optional embodiment, in the oil-powder phase soft film powder provided by the present invention, the mass fraction of powdered solids in the oil-powder phase soft film powder is 30-35 parts. The powdered solids in the soft film powder include a powder substrate, sodium alginate, calcium ion crosslinking agent, and powdered suspending agent.

[0015] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the powder substrate is selected from one or more of diatomaceous earth, kaolin, bentonite, montmorillonite, silica, and corn starch.

[0016] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the calcium ion crosslinking agent is selected from one or more of calcium sulfate (CI 77231), calcium gluconate, calcium chloride, calcium lactate, and calcium acetate, wherein CI77231 is the exclusive INCI colorant index number for cosmetic calcium sulfate.

[0017] As an optional embodiment, in the oil-powder phase soft film powder provided by the present invention, the suspending agent is selected from one or more of xanthan gum, hydroxyethyl cellulose, guar gum, distearate dimethylammonium lithium montmorillonite, dipolypentaerythritol hexahydroxystearate / hexastearate / hexarostearate, dipolypentaerythritol tetrahydroxystearate / tetraisostearate, dipolypentaerythritol hexahydroxystearate, hydrogenated (styrene / butadiene) copolymer, castor oil / IPDI copolymer, ethylene / propylene / styrene copolymer, and butene / ethylene / styrene copolymer.

[0018] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the emulsifier is selected from one or more of Tween 80, Tween 60, Tween 20, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, inulin lauryl carbamate, polyglycerol-3 diisostearate, polyglycerol-10 lauryl ester, polyglycerol-10 myristate, and tris(laurate-4) phosphate.

[0019] As an optional implementation, in the oil-powder phase soft film powder provided by the present invention, the oil is selected from one or more of high polarity oils, medium polarity oils, and non-polar oils.

[0020] Based on the same technical concept, the present invention also provides a dual-compartment mixed-type facial mask, including an oil-powder phase compartment and a mask liquid phase compartment. The oil-powder phase compartment and the mask liquid phase compartment are an integrated device with an isolation structure in the middle. The oil-powder phase compartment contains the aforementioned low-viscosity oil-powder phase soft film powder, and the mask liquid phase compartment contains mask liquid.

[0021] As an optional implementation, in the dual-compartment instant-mix facial mask provided by the present invention, the facial mask liquid comprises the following components in parts by weight: 0.01 to 0.2 parts of retarder, 5 to 20 parts of moisturizer, 1 to 1.2 parts of preservative, and the balance being water.

[0022] As an optional implementation, in the dual-compartment instant-mixing facial mask provided by the present invention, the retarder is selected from one or more of sodium citrate, sodium hexametaphosphate, and tetrasodium pyrophosphate.

[0023] As an optional implementation, in the dual-compartment instant-mixing facial mask provided by the present invention, the moisturizer is selected from one or more of dipropylene glycol, glycerin, propylene glycol, 1,3-butanediol, polyethylene glycol-400, sorbitol, glyceryl glucoside, trehalose, betaine, and erythritol.

[0024] As an optional implementation, in the dual-compartment instant-mix facial mask provided by the present invention, the preservative is selected from one or more of capryloyl hydroxamic acid, 1,2-pentanediol, p-hydroxyacetophenone, 1,2-hexanediol, phenoxyethanol, and chlorophenoxyethanol.

[0025] As an optional implementation, in the dual-compartment mixed-type facial mask provided by the present invention, the mass ratio of raw materials in the oil-powder phase compartment and the liquid phase compartment of the facial mask is 1:1 to 1:2.

[0026] Furthermore, a ratio of 1:1.5 is preferred.

[0027] As an optional implementation, in the dual-compartment instant-mixing facial mask provided by the present invention, the dual-compartment instant-mixing facial mask is packaged using one of the following: a dual-compartment facial mask bag, an integrated dual-cavity shaker bottle, or an independent dual-cavity bag.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention combines shea butter bio-emulsifier with PPG-14 butyl ether to stably suspend more than 30% of high-content film powder in an ultra-low viscosity oil phase of 5000-8000 mPa·s. The accelerated stability test after 30 days showed no sedimentation or stratification, solving the common industry pain points of easy sedimentation and stratification in conventional low viscosity systems and difficult mixing in high viscosity systems. At the same time, this viscosity range can shorten the mixing time and ensure the best fineness and uniformity of the material.

[0029] (2) Thanks to its low viscosity, the present invention can be mixed in just about 7 to 8 seconds, resulting in extremely high product mixing efficiency. The products prepared by the present invention have no adverse reactions, low irritation, and high safety. Detailed Implementation

[0030] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the specification and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0031] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0032] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0033] Main raw material sources: Distearate lithium dimethylammonium montmorillonite, trade name BT-001, manufacturer is United Micron; Xanthan gum, trade name TOPCG HT80, manufacturer is BLG; Dipolypentaerythritol hexahydroxystearate / hexastearate / hexapineate, trade name COSMOL 168ARV, manufacturer is Nissin Chemicals, Japan; Shea butter bio-emulsifier, trade name BIOLIPIDSHEA CB, manufacturer is United Active Inc.

[0034] Example 1 Preparation of low-viscosity oil-powder phase soft film powder: Add each raw material to a beaker in sequence according to the proportion, heat to 80-85℃, stir until completely dissolved, stir and cool down to 38℃, and let stand for later use.

[0035] Preparation of liquid phase face mask solution: Add each raw material to a beaker in sequence according to the proportion, heat to 80-85℃, stir until completely dissolved, stir and cool down to 38℃, and let stand for later use.

[0036] According to the ratio of oil-powder phase to mask liquid phase = 1:1.5, weigh out 16.8g of oil-powder phase and 25.2g of mask liquid phase, and fill them into the two compartments of the mask bag respectively, and let them stand for later use.

[0037] The raw materials used in each embodiment and comparative example, as well as the proportions of each raw material added, are shown in Table 1 below. The sum of the mass fractions of the film powder in the oil phase is the sum of the mass fractions of diatomaceous earth, sodium alginate, calcium sulfate, distearate, lithium dimethylammonium montmorillonite, and xanthan gum.

[0038] Table 1: Mass parts of each raw material added in the examples and comparative examples

[0039] Comparative Example 9 A commercially available new hydrating and refreshing facial mask, weighing 42g in total. Its powder formulation includes magnesium carbonate, sodium alginate, silica, calcium sulfate, CI 77947, pentasodium tripolyphosphate, CI 77492, CI 77491, tetrasodium pyrophosphate, and sodium trimetaphosphate; the membrane liquid phase formulation includes water, glycerin, phenoxyethanol, panthenol, allantoin, and glyceryl acrylate / acrylic acid copolymer.

[0040] How to use Examples 1-3 and Comparative Examples 1-8: Use after cleansing. Squeeze the oil-powder phase into the mask liquid phase, shake well and press. Tear open the mask pouch and apply a thick, even layer of the mask to the face, avoiding the eye area. Leave the mask on for 10-15 minutes, until it is completely dry. Then, peel off the mask from the forehead downwards. For easier removal, you can first lift the edges of the mask.

[0041] Comparative Example 9: Instructions for use of commercially available products: Use after cleansing. Mix the liquid and powder ingredients and stir for approximately 45-60 seconds until a smooth mousse-like consistency is formed. Small lumps in the mixture are normal. Apply a thick, even layer of the mask to the face, avoiding the eye area. Leave the mask on for 10-15 minutes, until completely dry. Then, peel the mask off starting from the forehead. For easier removal, you can lift the edges of the mask first. If the mask cannot be peeled off completely, use a soft, damp cloth to wipe away any residue.

[0042] Results Analysis I. Closed Patch Test on Human Skin 1. Test substance: The original cosmetic final product.

[0043] 2. Subjects: A total of 30 subjects, including 5 males and 25 females, aged 19 to 49 years, with a mean age of 27.6 ± 6.6 years, who met the subject voluntary inclusion criteria.

[0044] 3. Patch Test Method: Using qualified patch test equipment, place approximately 0.020–0.025 mL of the test substance into the patch tester using the closed patch test method. Apply the patch to the back of the subject with hypoallergenic adhesive tape. Remove the test substance after 24 hours. Observe the skin reaction at 0.5, 24, and 48 hours after removal. Record the results according to the skin reaction grading standards in the currently effective technical specifications. The reaction grading standards are shown in Table 2.

[0045] Table 2: Grading Criteria for Patch Test Response

[0046] The number of people responding to each level is shown in Table 3 below.

[0047] Table 3: Number of People Responding to Each Level

[0048] Continued from Table 3

[0049] The results in Table 3 show that the highly stable compositions prepared in this invention have no adverse reactions, low irritation, and high safety.

[0050] II. Stability Testing The oil phase samples of the experimental group were stored in environments of 25℃ (room temperature), 4℃ (refrigeration), 50℃ and 40℃ (accelerated aging) for 30 days. The powder sedimentation, system stratification or color change were observed and recorded regularly. The results are shown in Table 4. The initial viscosity was obtained after standing for 24 hours at 25℃ using a BROOKFIELD DV2T viscometer with a #4 rotor and a rotation speed of 12 rpm.

[0051] Table 4: Stability Test Results

[0052] Continued from Table 4

[0053] As shown in Table 4, Comparative Examples 1-6 all exhibited stability stratification issues. Although Comparative Example 7 increased the proportion of oil-phase thickener, resulting in a slight increase in system viscosity, the stratification defect remained unresolved. However, the oil-phase samples from Examples 1-2, after being stored at four different test temperatures for four weeks, did not show any powder sedimentation, stratification, or discoloration. This indicates that when shea butter bio-emulsifier and PPG-14 butyl ether are combined in a specific ratio of 1:5, they can produce a synergistic effect, exhibiting excellent suspension stability for the powder and maintaining system homogeneity over a long period.

[0054] III. Convenience Test Testing Methods: Thirty subjects (15 males and 15 females, aged 20–45 years) were selected and tested using both the example and comparative products. The following indicators were recorded: ① Subjective rating of ease of use (1-5 points, with 5 points being the best); ② Mixing time (shaking and pressing time or time to mix until no lumps remain); ③ Clumping rate; The test results are shown in Table 5.

[0055] Table 5. Convenience Test Results

[0056] As shown in Table 5, the mixing time of the product in the embodiments of the present invention is significantly shorter than that of the comparative examples (7-10s vs 49-50s). Comparative example 7, due to its high viscosity, is difficult to shake evenly, resulting in a longer mixing time. Comparative examples 8-9, being traditional soft films, require even longer mixing times. The clumping rate of examples 1-3 is 0 (significantly better than the 33%-35% of comparative examples 8-9), and the subjective score for ease of operation is higher (4.5-5 points vs 1-2 points). The above results indicate that the product of the present invention has superior ease of operation, high mixing efficiency, and no clumping problem, resulting in a better user experience.

[0057] IV. Subjective Evaluation of Sensory Indicators A consumer questionnaire survey of over 60 people after using the product was conducted, comparing before and after results. This study preliminarily verified the product's ease of film removal, skin smoothness, moisturizing, softness, and overall preference after use. Evaluation indicators were set at 1 point for extremely dissatisfied, 2 for dissatisfied, 3 for average, 4 for fairly satisfied, and 5 for satisfied. The percentage of respondents scoring ≥4 points was statistically analyzed. To compare differences between different product dimensions, data analysis software was used for statistical analysis. A significance test was performed. If p < 0.05, then the products are considered to have significant differences in this dimension. See Table 6 for the tests for each dimension.

[0058] Table 6: Percentage of people with a score of ≥4 in each dimension (in %)

[0059] As shown in Table 6, compared with Comparative Examples 8 and 9, Example 2 can effectively improve the ease of peeling after film formation and significantly improve skin smoothness, moisturization and softness, ultimately achieving higher overall consumer preference and demonstrating outstanding market application potential.

[0060] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. However, it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A low-viscosity oil-powder phase soft film powder, characterized in that, The product includes a suspension-stabilizing composition comprising shea butter bioemulsifier and PPG-14 butyl ether.

2. The low-viscosity oil-powder phase soft film powder according to claim 1, characterized in that, The mass ratio of shea butter bio-emulsifier to PPG-14 butyl ether in the suspension stabilized composition is 1:4 to 5.

3. The low-viscosity oil-powder phase soft film powder according to claim 1, characterized in that, The shea butter bio-emulsifier comprises a fermentation product of Candida albicans / glucose / methyl rapeseed oil and shea butter, wherein the mass ratio of the fermentation product of Candida albicans / glucose / methyl rapeseed oil and shea butter is 9:

1.

4. The low-viscosity oil-powder phase soft film powder according to claim 1, characterized in that, The suspension-stabilizing composition in the oil-powder phase soft film powder is 0.6 to 3 parts by mass.

5. The low-viscosity oil-powder phase soft film powder according to any one of claims 1 to 4, characterized in that, It also includes the following components in parts by weight: 3-20 parts powder base material, 3-10 parts sodium alginate, 6-20 parts calcium ion crosslinking agent, 2-15 parts suspending agent, 1-7 parts emulsifier, and the balance being oil.

6. The low-viscosity oil-powder phase soft film powder according to any one of claims 1 to 4, characterized in that, The viscosity of the oil-powder phase soft film powder after standing at 25°C for 24 hours is 5000-8000 mPa·s.

7. The low-viscosity oil-powder phase soft film powder according to any one of claims 1 to 4, characterized in that, The mass fraction of powdered solids in the oil-powder phase soft film powder is 30-35 parts.

8. The low-viscosity oil-powder phase soft film powder according to claim 5, characterized in that, The powder substrate is selected from one or more of diatomaceous earth, kaolin, bentonite, montmorillonite, silica, and corn starch; the calcium ion crosslinking agent is selected from one or more of calcium sulfate, calcium gluconate, calcium chloride, calcium lactate, and calcium acetate.

9. A dual-compartment instant-mixing facial mask, characterized in that, It includes an oil-powder phase chamber and a mask liquid phase chamber, which are integrated devices with an isolation structure in between. The oil-powder phase chamber contains low-viscosity oil-powder phase soft film powder as described in any one of claims 1 to 8, and the mask liquid phase chamber contains mask liquid.

10. The dual-compartment instant-mixing facial mask according to claim 9, characterized in that, Based on a total mass fraction of 100 parts, the mask liquid comprises the following components in parts by mass: 0.01-0.2 parts of retarder, 5-20 parts of moisturizer, 1-1.2 parts of preservative, and the balance being water; the retarder is selected from one or more of sodium citrate, sodium hexametaphosphate, and tetrasodium pyrophosphate; the moisturizer is selected from one or more of dipropylene glycol, glycerin, propylene glycol, 1,3-butanediol, polyethylene glycol-400, sorbitol, glyceryl glucoside, trehalose, betaine, and erythritol; the preservative is selected from one or more of capryloyl hydroxamic acid, 1,2-pentanediol, p-hydroxyacetophenone, 1,2-hexanediol, phenoxyethanol, and chlorphenesin.

11. The dual-compartment instant-mixing facial mask according to claim 9, characterized in that, The mass ratio of raw materials in the oil-powder phase chamber and the liquid phase chamber of the face mask is 1:1 to 1:

2.

12. The dual-compartment instant-mixing facial mask according to claim 9, characterized in that, The dual-compartment instant-mixing mask is packaged using one of the following methods: a dual-compartment mask bag, an integrated dual-chamber shaker bottle, or an independent dual-chamber bag.

Images