Moisturizing essence / mask dual-purpose emulsion as well as preparation method and application thereof

Abstract

The invention relates to the technical field of cosmetics, in particular to a moisturizing essence / mask dual-purpose emulsion as well as a preparation method and application thereof. The invention provides a moisturizing essence / mask dual-purpose emulsion. The moisturizing essence / mask dual-purpose emulsion comprises an emulsion a and a cross-linking agent solution b, wherein the emulsion a is prepared from the following components in percentage by mass: water replenishing emulsion, 0.4 to 0.8 percent of sodium alginate and 0.1 to 0.3 percent of carboxymethyl chitosan; and the cross-linking agent solution b comprises the following components in percentage by mass: 0.8-1.5% of a calcium ion cross-linking agent and the balance of water. Two water replenishing modes of emulsion method water replenishing or mask method water replenishing can be selected, a user can select a proper water replenishing mode according to actual needs of the user, the use modes are more diversified, and the application range is wider; the size and shape of the mask can adapt to people with different facial forms, the use method is simpler, the mask forming property is good, the mask can be directly torn off after use, and the washing-free effect can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetics, in particular to a hydrating essence / facial mask dual-purpose emulsion, and a preparation method and application thereof. Background Art

[0002] According to the secretion of water and oil, people's skin types can also be divided into 5 categories, namely dry, oily, mixed, neutral, and sensitive skin. Faced with different skin types and different environments, the corresponding hydration solutions are often different. Existing skin care products include lotions, masks and other types.

[0003] The existing facial masks are mainly of the following types:

[0004] The gel-like peel-off mask is in the form of a transparent or translucent gel or tape. Its main ingredient is polyvinyl alcohol, with a certain amount of moisturizer and wetting agent added as a plasticizer, or contains active ingredients for anti-wrinkle at the corners of the eyes.

[0005] Soft-film powder peel-off facial masks are mainly powder-based, usually containing polymers such as alginate, calcium or magnesium compounds (such as talc), and the rest are filler powders. After being mixed with water into a uniform slurry and applied, it gradually forms a film (sodium alginate and magnesium combine to form an insoluble colloid) and can be peeled off.

[0006] The main ingredient of hard mask powder peel-off mask is gypsum. It undergoes hydration reaction when adding water, and can be completely peeled off after heating and curing. Sometimes menthol, peppermint oil, borneol and other components are added to eliminate the heat sensation.

[0007] A cream-like wipe-off or wash-off mask, sometimes called a sleeping mask, has ingredients similar to night creams, but contains a certain amount of polymer film-forming agents, which have a certain sealing effect.

[0008] Mud masks that can be wiped off or washed off contain clay powders such as kaolin and montmorillonite. There are also volcanic mud and salt lake mud with natural sources. In addition to sealing, cleansing and absorbing excess sebum of the skin, some naturally derived muds also contain a variety of minerals and other active ingredients, and have certain skin care effects.

[0009] Patches include gel-containing nonwoven fabric patches and impregnated nonwoven fabric patches. Gel-containing nonwoven fabric patches are made by coating a layer of gel-type preparation on nonwoven fabric, cutting it into the shape of the face, and then sealing it in a package. Impregnated nonwoven fabric masks are more commonly used and are made by impregnating nonwoven fabric with mask liquid.

[0010] However, both gel peel-off masks and patch masks are based on molded gel, adhesive tape or textile fabric, and the size and shape of the masks are difficult to adapt to people with different face shapes, which brings poor user experience to consumers. Both soft mask powder peel-off masks and hard mask powder peel-off masks are in the form of powder products, which require consumers to prepare them by themselves when using them, and they need to use molds, which is more cumbersome to operate. Paste or mud-like wipe-off or water-washable masks have poor film-forming properties and are not easy to clean.

[0011] At present, there is no report on a dual-purpose moisturizing essence / mask emulsion product (i.e., the product includes emulsion a and cross-linking agent solution b; after emulsion a is spread on the skin, cross-linking agent solution b is sprayed to obtain a mask).

[0012] Therefore, the present invention designs a dual-purpose moisturizing essence / mask emulsion, so that people can choose a suitable moisturizing solution according to their actual skin conditions. Summary of the invention

[0013] [Technical issues]

[0014] Provides a hydrating serum / mask dual-purpose lotion.

[0015] [Technical solution]

[0016] Provided is a hydrating essence / mask dual-purpose emulsion, comprising emulsion a and cross-linking agent solution b; wherein:

[0017] Emulsion a, in terms of mass percentage, comprises: hydrating emulsion, 0.4-0.8% sodium alginate and 0.1-0.3% carboxymethyl chitosan;

[0018] The cross-linking agent solution b includes, by mass percentage, 0.8-1.5% of a calcium ion cross-linking agent and the balance of water.

[0019] In some embodiments, the cross-linking agent solution b is packaged in the form of a spray.

[0020] In some embodiments, when the hydrating essence / mask dual-purpose emulsion is used as a hydrating essence, only the emulsion a is used without using the cross-linking agent solution b.

[0021] In some embodiments, when the hydrating essence / mask dual-purpose emulsion is used as a hydrating mask, the mass ratio of emulsion a to cross-linking agent solution b is 10:1.

[0022] In some embodiments, the hydrating lotion comprises: Centella asiatica extract, Camellia sinensis extract, sodium hyaluronate and Tri(ceteareth-4) phosphate.

[0023] In some embodiments, the emulsion a comprises, by mass percentage, 0.5-1.5% Centella asiatica extract, 0.4-0.8% Camellia japonica extract, 0.1-0.3% sodium hyaluronate and 2-3% tri(ceteareth-4) phosphate.

[0024] In some embodiments, the hydrating lotion further comprises: water, glycerin, 1,3-propylene glycol, carbomer 934, caprylic / capric triglyceride, squalane, hydrogenated castor oil, jojoba oil, babassu seed oil, mango seed esters, preservatives and fragrances. By adding active ingredients such as Centella asiatica extract and Camellia japonica extract, the skin barrier can be repaired while achieving the effect of whitening and brightening. In some embodiments, the various types of oils involved in the hydrating lotion can replace oils with similar HLB values ​​and melting points.

[0025] In some embodiments, the preservative comprises caprylyl glycol.

[0026] In some embodiments, the calcium ion crosslinking agent includes at least one of calcium gluconate, calcium chloride, calcium lactate, or calcium acetate.

[0027] In some embodiments, the emulsion a comprises, by mass percentage:

[0028] 4-6% glycerin, 2-4% 1,3-propylene glycol, 0.5-1.5% Centella asiatica extract, 0.4-0.8% Camellia extract, 0.4-0.6% sodium alginate, 0.1-0.3% carboxymethyl chitosan, 0.1-0.3% carbomer 934, 0.1-0.3% sodium hyaluronate, 4-6% caprylic / capric triglyceride, 2-3% tri(ceteareth-4) phosphate, 1-3% squalane, 1-2% hydrogenated castor oil, 0.5-1.5% jojoba oil, 0.4-0.8% babassu seed oil, 0.4-0.6% mango seed esters, 0.05-0.1% caprylyl glycol, 0.05-0.1% fragrance and the rest water.

[0029] On the other hand, a method for preparing the aforementioned hydrating essence / mask dual-purpose emulsion is provided, wherein the method for preparing the emulsion A comprises the following steps:

[0030] (1) Mix deionized water, glycerin, 1,3-propylene glycol, Centella asiatica extract, Camellia japonica extract, sodium alginate, carboxymethyl chitosan, carbomer 934 and sodium hyaluronate, heat to 80-85° C., stir and keep warm until completely dissolved, to obtain a phase A raw material;

[0031] (2) caprylic / capric triglyceride, tri(ceteareth-4) phosphate, squalane, hydrogenated castor oil, jojoba oil, babassu seed oil and mango seed ester are mixed and heated to 80-85° C., stirred and kept warm until completely dissolved to obtain a phase B raw material;

[0032] (3) While still hot, mix the raw materials of phase B and phase A, homogenize, and cool to 50-55°C; add caprylyl glycol and flavor, stir and mix, adjust the pH value to 5, and cool to room temperature.

[0033] In another aspect, a method for preparing a hydrogel mask from the aforementioned hydrating essence / mask dual-purpose emulsion is provided, comprising the following steps:

[0034] First, the emulsion a is evenly covered, and then the cross-linking agent solution b is evenly sprayed to cover the emulsion a to obtain a hydrogel mask; wherein the mass ratio of the emulsion a to the cross-linking agent solution b is 10:1.

[0035] [Beneficial Effects]

[0036] (1) The present invention innovatively develops a hydrating essence / facial mask dual-purpose emulsion. The product includes emulsion a and cross-linker solution b; wherein: emulsion a, in terms of mass percentage, includes: hydrating emulsion, 0.4-0.8% sodium alginate and 0.1-0.3% carboxymethyl chitosan; cross-linker solution b, in terms of mass percentage, includes: 0.8-1.5% calcium ion cross-linker and balance water. Two hydrating modes are available: emulsion hydration or mask hydration. Users can choose the appropriate hydrating mode according to their actual needs. Based on the emulsion hydration of the hydrating essence / facial mask dual-purpose emulsion of the present invention, the user only needs to directly apply emulsion a (i.e., use it as a hydrating essence). For moisturizing by the facial mask method of the moisturizing essence / mask dual-purpose emulsion of the present invention, the user needs to first evenly cover the skin with emulsion a, and then evenly spray the cross-linking agent solution b to cover the emulsion a, to obtain a hydrogel facial mask; wherein the mass ratio of the emulsion a to the cross-linking agent solution b is 10:1; the present invention adopts a separate packaging design for the emulsion a and the cross-linking agent solution b, and first evenly covers the skin with emulsion a, and then evenly sprays the cross-linking agent solution b to cover the emulsion a, to obtain a hydrogel facial mask, thereby innovating the form and preparation method (method of use) of the facial mask;

[0037] (2) Compared with existing emulsion products or mask products, the hydrating essence / mask dual-purpose emulsion of the present invention can not only be used as a hydrating essence, but can also be used in combination with the cross-linking agent solution b as a hydrating mask, with more diverse usage methods and a wider range of applicable populations;

[0038] (3) Compared with the existing facial mask products, the hydrating essence / mask dual-purpose emulsion of the present invention is used as a facial mask. The size and shape of the hydrogel facial mask formed in situ on the user's skin surface can adapt to people with different face shapes, and the method of use is simpler. It is different from the powder form of soft mask powder peeling type facial mask and hard mask powder peeling type facial mask, which need to be prepared with the help of a mold and take a long time. The facial mask of the present invention has good film-forming properties and can be directly peeled off after use, which can achieve a wash-free effect. The method of use is convenient and easy to operate, which solves the technical problem that the existing paste-like or mud-like wipe-off or water-washable facial masks have poor film-forming properties and are not easy to clean.

[0039] (4) After extensive research, the present invention has found that when the hydrating essence / mask dual-purpose emulsion of the present invention is used as a hydrogel mask, the choice of skeleton material has a significant effect on the skin feel, mechanical strength and astringency of the hydrogel mask. Only by using the sodium alginate and carboxymethyl chitosan compound of the present invention as the gel skeleton, the prepared hydrogel mask can simultaneously have excellent mechanical strength and strong astringency, and at the same time, the skin feel is more comfortable;

[0040] (5) Compared with conventional lotions or masks, the hydrating essence / mask dual-purpose emulsion of the present invention has more excellent immediate and long-term effects of replenishing skin moisture, reducing transepidermal water loss, increasing skin elasticity, increasing the penetration depth of active ingredients into the skin, and repairing the skin barrier;

[0041] (6) When used as a moisturizing essence, the moisturizing essence / mask dual-purpose emulsion of the present invention can quickly penetrate into the deep layer of the skin, promoting the absorption of active ingredients and skin metabolism; at the same time, sodium alginate and carboxymethyl chitosan can form a film on the skin surface, play a barrier role, prevent water loss, and enhance the ability to lock in moisture and retain moisture; when used as a moisturizing mask, sodium alginate and carboxymethyl chitosan provide a gel skeleton that can form a hydrogel with calcium ions, which can further reduce water volatilization when attached to the skin surface, further improving the moisturizing effect, and at the same time, the hydrogel will spontaneously shrink, achieving the effect of tightening the skin and long-term moisturizing;

[0042] (7) The present invention mixes the phase B raw material and the phase A raw material while hot, homogenizes, and cools to 50-55°C; adds caprylyl glycol and essence, stirs and mixes, adjusts the pH value to 5, cools to room temperature, and uses microemulsification technology to make the active substances (Centella asiatica extract, camellia extract, sodium hyaluronate, etc.) smaller in particle size and easier to absorb; by adding camellia extract and Centella asiatica extract, it can repair the damaged skin barrier, restore the skin's own water retention ability, and achieve long-term skin moisturizing; by adding sodium hyaluronate, it can penetrate into the inner layer of the skin, enhance skin elasticity, increase skin water content, and play a role in continuous moisturizing. Compared with traditional emulsions or masks, the hydrating essence / mask dual-purpose emulsion of the present invention has more excellent immediate and long-term skin moisture replenishment, reduces transepidermal water loss, increases skin elasticity, increases the penetration depth of active ingredients, and repairs the skin barrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the main mechanism involved in the preparation of the emulsion a of Example 1 and the hydrogel mask of Example 2 of the present invention;

[0044] Figure 2 The image results collected by laser confocal microscope of the pig skin transdermal effect experiment of the facial mask of Example 2 and Comparative Example 2;

[0045] Figure 3 The following are the results of the skin penetration depth analysis of the pig skin test of the facial masks of Example 2 and Comparative Example 2. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0047] Unless otherwise specified, all raw materials involved in Examples 1 and 2 of the present invention can be obtained from commercial sources. For example:

[0048] Centella asiatica extract, purchased from Clariant Chemical Technology, product name CalmYang PRO;

[0049] Camellia extract, purchased from Clariant Chemical Technology, product name Redsnow;

[0050] Sodium hyaluronate, 20-35 KDa, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0051] Example 1

[0052] A moisturizing essence / facial mask dual-purpose emulsion, comprising emulsion a and cross-linking agent solution b; wherein:

[0053] Emulsion a, in terms of mass percentage, includes: 75.1% deionized water, 6% glycerol, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia japonica extract, 0.5% sodium alginate (SA), 0.2% carboxymethyl chitosan (CMCS), 0.2% carbomer 934, 0.2% sodium hyaluronate; 5% caprylic / capric triglyceride (GTCC), 2.5% tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% babassu seed oil, 0.4% mango seed esters; 0.1% caprylyl glycol and 0.1% fragrance;

[0054] The cross-linking agent solution b, in terms of mass percentage, includes: 1% calcium gluconate and 99% deionized water.

[0055] The preparation method of emulsion a comprises the following steps:

[0056] (1) 75.1% deionized water, 6% glycerol, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia japonica extract, 0.5% sodium alginate, 0.2% carboxymethyl chitosan, 0.2% carbomer 934 and 0.2% sodium hyaluronate were mixed, heated to 80° C., stirred at 600 rpm until completely dissolved, to obtain a phase A raw material;

[0057] (2) 5% GTCC, 2.5% tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% babassu seed oil and 0.4% mango seed ester were mixed and heated to 80° C. and stirred at 300 rpm until completely dissolved to obtain a phase B raw material;

[0058] (3) While still hot, mix the raw materials of phase B and phase A, homogenize at 5000 rpm for 8 min, and cool to 50° C.; add 0.1% caprylyl glycol and 0.1% flavor, stir at 250 rpm, adjust the pH to 5, and cool to room temperature.

[0059] The test found that emulsion a has uniform particle size and a large number of micelles. After centrifuging it at 4000 rpm for 20 minutes, the emulsion can still maintain good stability.

[0060] The preparation method of the cross-linking agent solution b comprises the following steps: mixing 1% calcium gluconate and 99% deionized water until they are completely dissolved.

[0061] Example 2

[0062] A method for preparing a hydrogel facial mask, using the hydrating essence / facial mask dual-purpose emulsion of Example 1, the method comprising the following steps:

[0063] First, the skin is evenly covered with lotion a, and then the cross-linking agent solution b is evenly sprayed to cover the lotion a to obtain a hydrogel mask; wherein the mass ratio of the lotion a to the cross-linking agent solution b is 10:1.

[0064] Test example:

[0065] 1. Instant hydration effect test:

[0066] In order to verify the instant hydration effect of the present invention, 10 volunteers aged 18 to 50 were invited to hydrate their left and right cheeks using different hydration modes:

[0067] The left cheek was moisturized by lotion method (the lotion a of Example 1 was applied to the left cheek at 0.2 g / cm 2 ), recorded as application example 1;

[0068] The right cheek was moisturized by mask method (according to the method of Example 2, firstly, the right cheek was evenly covered with lotion a 0.2g / cm 2 , and then the cross-linking agent solution b is evenly sprayed to cover the emulsion a, wherein the mass ratio of the emulsion a to the cross-linking agent solution b is 10:1, thereby preparing a hydrogel mask in situ, and the use time of the hydrogel mask is 20 minutes starting from the end of spraying), which is recorded as Application Example 2.

[0069] The moisture content of the corresponding facial skin was tested before use, 0 hours after use, 2 hours after use, 4 hours after use, and 8 hours after use, that is, the skin condition of a fixed area of ​​about 2 square centimeters on the left and right cheeks of each volunteer was measured. The Cutometer dual MPA 580 skin detector was used to test various indicators and obtain the skin moisture change data comprehensively. Among them, the moisture increase rate = (skin moisture content during the test - skin moisture content before the test) / skin moisture content before the test. The test results are shown in Table 1 (each value is the average of 10 volunteers):

[0070] Table 1 Results of immediate skin improvement test

[0071] time Application Example 1 Moisture Increase Rate / % Application Example 2 Moisture Increase Rate / % 0 hours 33.96 37.46 2 hours 32.65 34.16 4 hours 25.97 26.48 8 hours 15.63 17.55

[0072] The experimental results show that the hydrating essence / mask dual-purpose emulsion of Example 1 has excellent instant hydrating effect regardless of whether it is hydrating by the emulsion method or the mask method; the moisture increase rate of the mask method within 8 hours after use is significantly higher than that of the emulsion method, which confirms that the hydrogel mask of Example 2 has a better instant hydrating effect than the single emulsion a of Example 1.

[0073] 2. Long-term hydration effect test.

[0074] In order to verify the long-lasting hydrating effect of the hydrating essence / mask dual-purpose emulsion of the present invention, 10 volunteers aged 18 to 50 were invited to hydrate their left and right cheeks using different hydrating modes:

[0075] The left cheek was moisturized by lotion method (the lotion a of Example 1 was applied to the left cheek at 0.2 g / cm 2 ), the frequency of moisturizing by lotion method was once a day, and the use lasted for one month, during which the volunteers did not use other skin care products, which was recorded as application example 3;

[0076] The right cheek was moisturized by mask method (according to the method of Example 2, firstly, the right cheek was evenly covered with lotion a 0.2g / cm 2 Then, the cross-linking agent solution b is evenly sprayed to cover the emulsion a, wherein the mass ratio of the emulsion a to the cross-linking agent solution b is 10:1, thereby preparing the hydrogel mask in situ, and the use time of the hydrogel mask is 20 minutes starting from the end of spraying). The mask method is used for hydration once a day for one month, during which the volunteers do not use other skin care products. This is recorded as Application Example 4.

[0077] After one month of use, the skin condition of a fixed area of ​​about 2 square centimeters on the left and right cheeks of each volunteer was tracked, and various indicators were tested using the Cutometer dual MPA 580 skin detector to obtain comprehensive skin moisture change data. Among them, the moisture increase rate = (skin moisture content during the test - skin moisture content before the test) / skin moisture content before the test; transepidermal water loss reduction rate = (transepidermal water loss before the test - transepidermal water loss during the test) / transepidermal water loss before the test; skin elasticity increase rate = (skin elasticity during the test - skin elasticity before the test) / skin elasticity before the test. The test results are shown in Table 2 (each value is the average of 10 volunteers).

[0078] Table 2

[0079] Moisture increase rate / % Transepidermal water loss reduction rate / % Skin elasticity increase rate / % Application Example 3 5.82 4.98 2.21 Application Example 4 10.27 6.39 3.56

[0080] The experimental results show that the hydrating essence / mask dual-purpose emulsion of Example 1 can effectively replenish skin moisture, reduce transepidermal water loss and increase skin elasticity, whether it is hydrating by the emulsion method or the mask method, and has excellent long-term hydrating effect and the function of increasing skin elasticity and repairing skin barrier. The hydrating essence / mask dual-purpose emulsion of Example 1 and the mask method of hydrating by the method of Example 2 are used. After continuous use for 1 month, the water increase rate, transepidermal water loss reduction rate and skin elasticity increase rate are significantly higher than those of the emulsion method, which proves that the hydrogel mask of Example 2 has a better long-term hydrating effect than the single emulsion a of Example 1.

[0081] Comparative Example 1 uses other skeletons

[0082] A moisturizing essence / mask dual-purpose emulsion, referring to Example 1, differs only in that other skeletons are used to replace the combination of sodium alginate and carboxymethyl chitosan, specifically:

[0083] Comparative Example 1-1:

[0084] Emulsion a, in terms of mass percentage, includes: 75.1% deionized water, 6% glycerol, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia extract, 0.7% sodium alginate (SA), 0.2% Carbomer 934, 0.2% sodium hyaluronate; 5% GTCC, 2.5% Tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% Babassu seed oil, 0.4% mango seed esters; 0.1% caprylyl glycol and 0.1% fragrance;

[0085] The cross-linking agent solution b, in terms of mass percentage, includes: 1% calcium gluconate and 99% deionized water.

[0086] Comparative Example 1-2:

[0087] Emulsion a, in terms of mass percentage, includes: 75.1% deionized water, 6% glycerol, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia extract, 0.7% carboxymethyl chitosan (CMCS), 0.2% carbomer 934, 0.2% sodium hyaluronate; 5% GTCC, 2.5% tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% babassu seed oil, 0.4% mango seed esters; 0.1% caprylyl glycol and 0.1% fragrance;

[0088] The cross-linking agent solution b, in terms of mass percentage, includes: 1% calcium gluconate and 99% deionized water.

[0089] Comparative Examples 1-3:

[0090] Emulsion a, in terms of mass percentage, includes: 75.1% deionized water, 6% glycerin, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia extract, 0.9% sodium hyaluronate (HA), 0.2% Carbomer 934; 5% GTCC, 2.5% Tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% Babassu seed oil, 0.4% mango seed esters; 0.1% caprylyl glycol and 0.1% fragrance;

[0091] The cross-linking agent solution b, in terms of mass percentage, includes: 1% calcium gluconate and 99% deionized water.

[0092] Comparative Examples 1-4:

[0093] Emulsion a, in terms of mass percentage, includes: 75.1% deionized water, 6% glycerol, 3% 1,3-propylene glycol, 1% Centella asiatica extract, 0.6% Camellia extract, 0.7% carboxymethylcellulose (CMC), 0.2% carbomer 934, 0.2% sodium hyaluronate; 5% GTCC, 2.5% tri(ceteareth-4) phosphate, 2% squalane, 1.5% hydrogenated castor oil, 1% jojoba oil, 0.6% babassu seed oil, 0.4% mango seed esters; 0.1% caprylyl glycol and 0.1% fragrance;

[0094] The cross-linking agent solution b, in terms of mass percentage, includes: 1% calcium gluconate and 99% deionized water.

[0095] Performance test and results:

[0096] Example 1, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 1-3 and Comparative Example 1-4 all referred to the method of Example 2 to attempt to prepare a hydrogel mask; and a comparative test was performed with reference to the mask method for hydration in "I. Instant Hydrating Effect Test" of the test example. The subjects scored the use experience of the hydrogel masks of Example 1, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 1-3 and Comparative Example 1-4 in terms of skin feel, mechanical strength and astringency, and the results are shown in Table 3.

[0097] Table 3

[0098] Skin feel Mechanical strength Convergence Example 1 ++ ++ ++ Comparative Example 1-1 + ++ - Comparative Example 1-2 + - ++ Comparative Examples 1-3 + - - Comparative Examples 1-4 - + +

[0099] Note: - indicates average effect, + indicates good effect, and ++ indicates very good effect.

[0100] By comparison, it is found that when the moisturizing essence / mask dual-purpose emulsion of the present invention is used as a hydrogel mask, the selection of the skeleton material has a significant effect on the skin feel, mechanical strength and convergence of the hydrogel mask. Only when the sodium alginate and carboxymethyl chitosan of the present invention are compounded as the gel skeleton, the prepared hydrogel mask can simultaneously have excellent mechanical strength and strong convergence ability, and the skin feel is more comfortable. Comparative Example 1-1 uses sodium alginate alone as the skeleton, and the hardness of the prepared hydrogel mask is too high, there is no convergence ability, the convergence effect is the worst, and the fit with the face is poor when used as a mask; Comparative Example 1-2 uses carboxymethyl chitosan alone as the skeleton, and the prepared hydrogel has poor mechanical strength, weak adhesion to the face, easy to fall, and cannot be used normally; Comparative Example 1-3 uses hyaluronic acid as the skeleton to try to prepare a hydrogel mask, and hyaluronic acid and calcium ion cross-linking cannot form a gel at all, and cannot be used as a hydrogel mask; Comparative Example 1-4 uses carboxymethyl cellulose as the skeleton to prepare a hydrogel mask with excessive viscosity and uncomfortable skin feel. In summary, the use of other common skeleton materials either fails to successfully prepare hydrogel masks, or the prepared hydrogel masks fail to simultaneously achieve excellent mechanical strength and strong astringency while also providing skin comfort.

[0101] Comparative Example 2

[0102] A commercially available hydrating and repairing facial mask, the formula of which is: corn (ZEA MAYS) starch, sodium alginate, maltodextrin, sodium alginate, mineral oil, borneol, menthol, aloe (ALOE VERA) extract, Centella Asiatica (CENTELLA ASIATICA) extract, ascorbic acid vitamin C, purslane (PORTULACA OLERACEA) extract, tetrasodium pyrophosphate, CI42090;

[0103] Mask form: soft powder peel-off mask.

[0104] 5 μg / mL of fluorescein isothiocyanate (FITC) fluorescent dye (simulating the active ingredient) was added to the aqueous phase of the facial masks of Example 2 and Comparative Example 2 to test the ability of the active ingredients in the facial masks to enter the skin. The specific method is as follows: a pig skin with a radius of 1 cm and a thickness of 2 mm was cut for use, and it was assembled in a vertical static diffusion cell, with the lower end of the pig skin being a PBS buffer and the upper end being the facial masks of Example 1 and Comparative Example 2 with FITC fluorescent dye added, and the facial mask coverage amount was 0.2 g / cm 2After 24 hours of transdermal action, the pig skin was rinsed with clean water and then dried with paper. The pig skin was cut into strips and placed in a frozen sample holder, wrapped with embedding agent and placed in a -20°C refrigerator; then it was cut into 20μm samples using a freezing slicer and placed on a glass slide and protected from light; different samples were placed under a laser confocal microscope for observation, FITC was excited at a wavelength of 488nm, the sample was first found in the bright field and the focus was adjusted, then the image was collected and the channels were overlapped to obtain an overlay image (mixed), the results are as follows Figure 2 As shown; ImageJ was used to analyze the transdermal depth, and OriginLab was used to draw the graph. The results are shown in Figure 3 shown.

[0105] Performance test and results:

[0106] contrast Figure 2 and Figure 3 It can be seen that the water-soluble fluorescent component of the mask of Comparative Example 2, which also uses sodium alginate as a skeleton, is only detected to accumulate at 60 μm, emitting a strong fluorescence, indicating that its active ingredients are difficult to penetrate into the deep layer of the skin. The water-soluble fluorescent component of the hydrogel mask of Example 2 is dispersed more evenly, with the deepest point being 700 μm, which proves that its transdermal depth is significantly improved. The reason is that after the hydrating essence / mask dual-purpose emulsion of Example 1 is formed into a hydrogel mask according to the method of Example 2, a large number of micelles still exist, and the micelle system can greatly enhance its transdermal ability, allowing the active ingredients to enter the deep layer of the skin; therefore, compared with the traditional mask (such as Comparative Example 2), the hydrating essence / mask dual-purpose emulsion of Example 1 formed into a hydrogel mask according to the method of Example 2 can deliver the active ingredients more effectively and deeply, achieving better skin care effects.

[0107] Comparative Example 3

[0108] A commercially available hydrating and repairing lotion has the following formula: water, mineral oil, ethylhexyl palmitate, ceteareth-25, carbomer, triethanolamine, polyacrylamide, methylparaben, propylparaben, allantoin, tocopherol (vitamin E), laureth-7, and fragrance.

[0109] Performance test and results:

[0110] In order to compare the instant hydrating effects of the hydrating essence / mask dual-purpose emulsion of the present invention and traditional emulsions, 10 volunteers aged 18 to 50 were invited to use different emulsions on their left and right cheeks for hydration:

[0111] The left cheek was moisturized by lotion method (the lotion a of Example 1 was applied to the left cheek at 0.2 g / cm 2 ), recorded as application example 1;

[0112] The right cheek was treated with Comparative Example 3 (0.2 g / cm2 of lotion a of Comparative Example 3 was applied to the right cheek). 2 ) for water replenishment;

[0113] The moisture content of the corresponding facial skin was tested before use, 0 hours after use, 2 hours after use, 4 hours after use, and 8 hours after use, that is, the skin condition of a fixed area of ​​about 2 square centimeters on the left and right cheeks of each volunteer was measured. The Cutometer dual MPA 580 skin detector was used to test various indicators and obtain the skin moisture change data comprehensively. Among them, the moisture increase rate = (skin moisture content during the test - skin moisture content before the test) / skin moisture content before the test. The test results are shown in Table 4 (each value is the average of 10 volunteers):

[0114] Table 4

[0115] time Application Example 1 Moisture Increase Rate / % Comparative Example 3 Moisture Increase Rate / % 0 hours 33.96 30.35 2 hours 32.65 15.84 4 hours 25.97 9.52 8 hours 15.63 6.17

[0116] The experimental results show that compared with Comparative Example 3, the instant hydrating effect of Application Example 1 is more significant. This is because the sodium alginate and carboxymethyl chitosan added to the emulsion can quickly form a film on the skin surface, reduce water evaporation, and increase the skin's water content; while the water that is not absorbed by the skin of the traditional emulsion (such as Comparative Example 3) will evaporate quickly, the hydrating effect is poor, and it is impossible to continue hydrating for a long time.

[0117] The present invention has found that the moisturizing essence / mask dual-purpose emulsion of Example 1, when used as an emulsion, has a light skin feel and is easy to spread; compared with traditional emulsions, the present invention uses sodium alginate and carboxymethyl chitosan as a skeleton, which is conducive to better and faster film formation of emulsion a on the skin surface, reduces water evaporation, increases skin water content, and plays a role in continuous water lock and deep moisturizing. The moisturizing essence / mask dual-purpose emulsion of Example 1 is used as a hydrogel mask. The present invention uses sodium alginate and carboxymethyl chitosan as a skeleton, and can form a polymer hydrogel under the action of cross-linking agent solution b, thereby playing an enhanced sustained release effect on functional ingredients; on the other hand, after the hydrogel is formed, the hydrogel mask will naturally converge, thereby achieving the effect of tightening the skin; on the other hand, there are still a large number of micelles in the hydrogel mask of the present invention, and its penetration effect is greatly enhanced compared with traditional mud masks, which can achieve deep moisturizing and long-lasting moisturizing effects.

[0118] The above experimental results all indicate that the hydrating essence / mask dual-purpose emulsion of Example 1 has excellent effects of replenishing skin moisture and repairing the skin barrier. At the same time, based on the hydrating essence / mask dual-purpose emulsion of Example 1, different hydrating effects are achieved by adopting different hydrating modes. Users can choose a suitable hydrating mode according to their actual needs.

[0119] The hydrating essence / mask dual-purpose emulsion of the present invention adopts separate packaging designs for emulsion a and cross-linking agent solution b, and adopts the method of first evenly covering the skin with emulsion a, and then evenly spraying the cross-linking agent solution b to cover the emulsion a, to obtain a hydrogel mask, thereby innovating the form and preparation method (method of use) of the mask. The hydrogel mask prepared by the method of Example 2 of the present invention adopts the method of first evenly covering the skin with emulsion a, and then evenly spraying the cross-linking agent solution b to cover the emulsion a. The hydrogel mask can have excellent mechanical strength and strong astringency at the same time, and at the same time, the skin feels more comfortable. The size and shape of the hydrogel mask obtained thereby can adapt to people with various face shapes, overcoming the size problems of the gel-like peel-off masks and patch masks on the market. The size and shape are difficult to adapt to people with various face shapes, thus bringing consumers a poor user experience; the hydrogel mask of the present invention only needs to apply emulsion a first (evenly cover the emulsion a on the skin), and then spray the cross-linking agent solution b (evenly spray the cross-linking agent solution b to cover the emulsion a), which overcomes the technical difficulties that the soft film powder peeling mask and the hard film powder peeling mask need to be self-modulated by consumers when used, and need to use molds, and the operation is relatively cumbersome. At the same time, it has excellent mechanical strength, strong astringency, and more comfortable skin feel; the hydrogel mask prepared by the present invention can be directly peeled off after use, and the effect of free washing can be achieved, which solves the poor film-forming property of the existing paste or mud-like wipe or water-washable mask, and the technical problem that it is not easy to clean. In addition, the moisturizing essence / mask dual-purpose emulsion of the present invention has a more excellent immediate and long-term effect of replenishing skin moisture, reducing transepidermal water loss, increasing skin elasticity, increasing the penetration depth of effective ingredients and repairing skin barriers compared to traditional emulsions or masks.

[0120] The embodiments provided above are not intended to limit the scope of the present invention, and the steps described are not intended to limit the execution order thereof. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection defined by the claims of the present invention.

Claims

1. A moisturizing essence / mask dual-purpose emulsion, characterized in that: Comprising an emulsion a and a cross-linking agent solution b; wherein: Emulsion a, in terms of mass percentage, comprises: hydrating emulsion, 0.4-0.8% sodium alginate and 0.1-0.3% carboxymethyl chitosan; The cross-linking agent solution b includes, by mass percentage, 0.8-1.5% of a calcium ion cross-linking agent and the balance of water.

2. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: The cross-linking agent solution b is packaged in the form of a spray.

3. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: When the hydrating essence / mask dual-purpose emulsion is used as the hydrating essence, only the emulsion a is used without using the cross-linking agent solution b.

4. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: When the hydrating essence / mask dual-purpose emulsion is used as a hydrating mask, the mass ratio of emulsion a to cross-linking agent solution b is 10:

1.

5. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: The moisturizing lotion includes: Centella asiatica extract, Camellia japonica extract, sodium hyaluronate and tri(ceteareth-4) phosphate.

6. The hydrating essence / mask dual-purpose emulsion according to claim 1 or 5, characterized in that: The emulsion a comprises, by mass percentage, 0.5-1.5% of Centella asiatica extract, 0.4-0.8% of Camellia japonica extract, 0.1-0.3% of sodium hyaluronate and 2-3% of tri(ceteareth-4) phosphate.

7. The hydrating essence / mask dual-purpose emulsion according to claim 5, characterized in that: The hydrating lotion also includes: water, glycerin, 1,3-propylene glycol, carbomer 934, caprylic / capric triglyceride, squalane, hydrogenated castor oil, jojoba oil, babassu seed oil, mango seed esters and preservatives.

8. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: The calcium ion cross-linking agent includes at least one of calcium gluconate, calcium chloride, calcium lactate or calcium acetate.

9. The hydrating essence / mask dual-purpose emulsion according to claim 1, characterized in that: The emulsion a comprises, by mass percentage, 4-6% glycerol, 2-4% 1,3-propylene glycol, 0.5-1.5% Centella asiatica extract, 0.4-0.8% Camellia japonica extract, 0.4-0.6% sodium alginate, 0.1-0.3% carboxymethyl chitosan, 0.1-0.3% carbomer 934, 0.1-0.3% sodium hyaluronate, 4-6% caprylic / capric triglyceride, 2-3% tri(ceteareth-4) phosphate, 1-3% squalane, 1-2% hydrogenated castor oil, 0.5-1.5% jojoba oil, 0.4-0.8% babassu seed oil, 0.4-0.6% mango seed ester, 0.05-0.1% caprylyl glycol, 0.05-0.1% essence and the balance water.

10. A method for preparing a hydrogel mask based on the hydrating essence / mask dual-purpose emulsion according to any one of claims 1 to 8, characterized in that: The steps include: First, the emulsion a is evenly covered, and then the cross-linking agent solution b is evenly sprayed to cover the emulsion a to obtain a hydrogel mask; wherein the mass ratio of the emulsion a to the cross-linking agent solution b is 10:1.

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