Water-emulsion double-layer moisturizer and preparation method thereof

Abstract

The invention discloses a water-emulsion double-layer moisturizer which is prepared from the following raw materials in percentage by weight: 1-5 parts of a moisturizer, 1-6 parts of an emollient, 0.1-5 parts of a skin conditioner, 0.001-0.3 part of a chelating agent and the balance of a solvent. According to the invention, natural grease and synthetic grease are combined, and the water-emulsion double-layer moisturizer with a stable system can be prepared through a simple process. According to the invention, after the high-content grease emollient is added, the moisturizing lotion has a refreshing skin feeling while maintaining the stability of a system, and has good moisturizing and skin care effects.

Description

Technical Field

[0001] The invention relates to A61K, to the field of makeup products, and in particular to a water-emulsion double-layer moisturizing water and a preparation method thereof. Background Art

[0002] With the development of society, people pay more and more attention to beauty. Moisturizing lotion is a commonly used basic skin care product. Moisturizing lotion is generally a single-phase system. If a high content of oil is added to the moisturizing water, it will cause the problem of system instability, resulting in system stratification and oil floating. Adding a thickener or a suspension stabilizer to the moisturizing water can improve the stability of the system, but the viscosity of the moisturizing water will increase, affecting the skin feel of the moisturizing water. The use of a two-phase moisturizing water can improve the problem of system stability, but the existing two-phase moisturizing water preparation process is cumbersome, and the cost of large-scale industrial production is high. Therefore, it is very important to develop a moisturizing water with a simple preparation process, a stable system, and no effect on the refreshing skin feel.

[0003] Chinese invention patent CN115463040B discloses a water-emulsion double-layer fast-acting long-lasting moisturizing skin care product and its preparation method. Non-polar or medium to low polar oils are selected to moisturize the skin to obtain a water-emulsion double-layer fast-acting long-lasting moisturizing skin care product with stable performance. It is a milk-covered water-type product with an upper emulsion phase and a lower hydrophilic phase. However, the two-phase stratification is slow, the liquid phase is unclear, and the system stability is poor. Chinese invention patent CN114146007B discloses a double-layer emulsion and its preparation method. A composition of polar oil and non-polar oil is used as a fat excipient, and a composition of hydrogenated lecithin and gemini surfactant is used as an emulsifier to form a stable double-layer emulsion system. However, the preparation process is complicated and the cost of large-scale industrial production is high. Summary of the invention

[0004] In order to develop a moisturizing water with a simple preparation process, a stable system and no effect on the refreshing skin feel, the first aspect of the present invention provides a water-emulsion double-layer moisturizing water, the preparation raw materials include, by weight percentage: 1-5 parts of moisturizing agent, 1-6 parts of emollient, 0.1-5 parts of skin conditioner, 0.001-0.3 parts of chelating agent, and the solvent is supplemented to 100%.

[0005] As a preferred embodiment, the emollient comprises natural oil and synthetic oil, and the weight ratio of the natural oil to the synthetic oil is (1-3): (1-3).

[0006] As a preferred embodiment, the weight ratio of the natural oil to the synthetic oil is (1-2): (2-3).

[0007] As a preferred embodiment, the weight ratio of the natural oil to the synthetic oil is 2:3.

[0008] As a preferred embodiment, the natural oil is a vegetable oil, and the vegetable oil is selected from at least one of jojoba seed oil, grape (VITIS VINIFERA) seed oil, wheat (Triticum vulgare) germ oil, camellia (CAMELLIA JAPONICA) seed oil, and avocado (Persea gratissima) oil.

[0009] As a preferred embodiment, the vegetable oil is jojoba (SIMMONDSIA CHINENSIS) seed oil.

[0010] As a preferred embodiment, the synthetic oil is an alkane or a glyceride, and the carbon number of the alkane is ≥9.

[0011] As a preferred embodiment, the alkane is selected from isododecane, isohexadecane, squalane, C 9-12 At least one of the alkanes.

[0012] As a preferred embodiment, the alkane is isododecane.

[0013] As a preferred embodiment, the glyceride is selected from at least one of isopropyl lauroyl sarcosinate, caprylic / capric triglyceride, isopropyl myristate, decyl oleate, isopropyl palmitate, and cocoglyceryl.

[0014] The inventor found in the experimental process that the combination of natural oils and synthetic oils can be used to prepare a water-emulsion double-layer moisturizing water with a stable system through a simple process. The possible reason is that the polarity of the oil formed by the combination of natural oils and short-chain alkanes is suitable for the water phase, and the double-layer moisturizing water formed has a transparent water phase and no floating oil on the surface of the emulsion layer. A representative example is the combination of jojoba seed oil and isododecane. The polarity of the oil formed is suitable, which will not cause turbidity of the emulsion and is easy to be layered and stable. The applicant further found that the natural oil and synthetic oil can be used in a weight ratio of 2:3 to prepare a water-emulsion double-layer moisturizing water by a simple process, avoiding cumbersome processing technology. The mixture obtained by using a suitable weight ratio of jojoba seed oil and isododecane has a suitable polarity and does not need to add surfactants separately to achieve the system compatibility stability of the water-emulsion double-layer moisturizing water. If the weight ratio is not within the preferred range, surfactants need to be added separately, otherwise it will cause system instability, turbidity of the system, and floating oil on the surface of the emulsion.

[0015] As a preferred embodiment, the solvent includes water and an alcohol solvent, and the weight ratio of the water to the alcohol solvent is (70-90): (0.1-1).

[0016] As a preferred embodiment, the solvent is a combination of water and 1,3-propylene glycol, and the weight ratio of water to 1,3-propylene glycol is (80-90): (0.5-1).

[0017] As a preferred embodiment, the moisturizing agent includes at least one of glycerin, diglycerin, urea, sodium lactate, sodium hyaluronate, trehalose, and propylene glycol.

[0018] As a preferred embodiment, the moisturizing agent includes a combination of glycerol, diglycerol and sodium hyaluronate. Preferably, the weight ratio of glycerol, diglycerol and sodium hyaluronate is (1-3): (0.1-1): (0.01-1).

[0019] More preferably, the weight ratio of glycerol, diglycerol and sodium hyaluronate is 3:0.3:0.1.

[0020] As a preferred embodiment, the skin conditioning agent includes at least one of panthenol, glycolipids, hexylene glycol, sodium PCA, niacinamide, and hydrolyzed yeast extract.

[0021] As a preferred embodiment, the skin conditioning agent comprises a combination of panthenol, 1,2-hexanediol, and glycolipid. Preferably, the weight ratio of panthenol, 1,2-hexanediol, and glycolipid is (0.1-3): (0.1-1): (0.001-0.1).

[0022] More preferably, the weight ratio of panthenol, 1,2-hexanediol and glycolipid is 1:0.5:0.03.

[0023] As a preferred embodiment, the chelating agent comprises a combination of caprylhydroxamic acid and disodium EDTA, and the weight ratio of caprylhydroxamic acid to disodium EDTA is (0.001-0.1): (0.001-0.1).

[0024] More preferably, the weight ratio of caprylhydroxamic acid to disodium EDTA is 0.05:0.02.

[0025] The second aspect of the present invention provides a method for preparing a water-emulsion double-layer moisturizing lotion, comprising the following steps:

[0026] S1: Add the solvent, moisturizer, skin conditioner and chelating agent into the reactor respectively, mix and stir, control the temperature to 50-70°C, and homogenize at medium speed for 1-10 minutes;

[0027] S2 adds emollient while homogenizing, and homogenizes at high speed for 1-10 minutes until the material is uniform.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The water-emulsion double-layer moisturizing lotion of the present invention adopts a combination of jojoba seed oil and isododecane in a weight ratio of 2:3, which can avoid cumbersome processing technology and prepare a system-stable water-emulsion double-layer moisturizing lotion through a simple process.

[0030] (2) The water-emulsion double-layer moisturizing water of the present invention uses a combination of water and 1,3-propylene glycol as a solvent, and the system formed has high stability, which can ensure that the two phases of the product are clearly separated, and the two phases can be separated quickly after being mixed and left to stand.

[0031] (3) The water-emulsion double-layer moisturizing lotion of the present invention has the appearance characteristics of a water-emulsion double-layer, and can be made into a product with a simple formula, in which the water phase is clear and the surface of the emulsion layer is not oily after being shaken and quickly separated.

[0032] (4) The water-emulsion double-layer moisturizing water of the present invention is added with a high content of oil emollient. The moisturizing water has a refreshing skin feel while maintaining the stability of the system and has a good moisturizing and skin care effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 1;

[0034] Figure 2 A top view of the water-emulsion double-layer moisturizing water prepared in Example 1;

[0035] Figure 3 This is a front view of the water-emulsion double-layer moisturizing water prepared in Example 2;

[0036] Figure 4 A top view of the double-layer moisturizing water lotion prepared in Example 2;

[0037] Figure 5 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 3;

[0038] Figure 6 A top view of the double-layer moisturizing water lotion prepared in Example 3;

[0039] Figure 7 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 4;

[0040] Figure 8 A top view of the double-layer moisturizing water lotion prepared in Example 4;

[0041] Fig. 9 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 5;

[0042] Fig.10 A top view of the double-layer moisturizing water lotion prepared in Example 5;

[0043] Fig.11 This is a front view of the water-emulsion double-layer moisturizing water prepared in Example 6;

[0044] Fig.12 A top view of the water-emulsion double-layer moisturizing water prepared in Example 6;

[0045] Fig.13 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 7;

[0046] Fig.14 A top view of the double-layer moisturizing water lotion prepared in Example 7;

[0047] Fig.15 This is a front view of the water-emulsion double-layer moisturizing lotion prepared in Example 8;

[0048] Fig.16 This is a top view of the double-layer moisturizing water lotion prepared in Example 8. DETAILED DESCRIPTION

[0049] Example 1

[0050] A water-emulsion double-layer moisturizing water, the preparation raw materials of which include, by weight percentage, 3.4 parts of moisturizing agent, 5 parts of emollient, 1.53 parts of skin conditioning agent, 0.07 parts of chelating agent, and the solvent is supplemented to 100%.

[0051] The emollient is a combination of jojoba seed oil and isopropyl lauroyl sarcosinate in a weight ratio of 2:3.

[0052] The moisturizing agent is a combination of glycerin, diglycerin and sodium hyaluronate, with a weight ratio of 3:0.3:0.1.

[0053] The skin conditioning agent is a combination of panthenol, 1,2-hexanediol, and glycolipids in a weight ratio of 1:0.5:0.03.

[0054] The chelating agent is a combination of caprylhydroxamic acid and disodium EDTA, with a weight ratio of 0.05:0.02.

[0055] The solvent is a combination of water and 1,3-propylene glycol, with a weight ratio of 89.25:0.75.

[0056] The jojoba seed oil was purchased from GUSTAV HEESS GmbH / Jojoba oil (Jojoba wax) refined DAC;

[0057] The panthenol was purchased from DSM Nutritional Products Ltd. / D-Panthenol;

[0058] The glycolipids were purchased from Bex Biotech (Jiangmen) Co., Ltd. / Biocos GL-202 (version number 00).

[0059] A method for preparing a water-emulsion double-layer moisturizing lotion comprises the following steps:

[0060] S1: Add the solvent, moisturizer, skin conditioner and chelating agent into the reactor respectively, mix and stir, control the temperature to 60°C, and homogenize at a medium speed of 3000 rpm for 5 minutes;

[0061] S2 adds emollient while homogenizing, and homogenizes at 6000rpm for 5 minutes until the material is uniform.

[0062] Example 2

[0063] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and isododecane in a weight ratio of 2:3.

[0064] Example 3

[0065] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and squalane in a weight ratio of 2:3.

[0066] Example 4

[0067] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and isododecane in a weight ratio of 2:5.

[0068] Example 5

[0069] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and isododecane in a weight ratio of 5:5.

[0070] Example 6

[0071] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and isohexadecane in a weight ratio of 2:3.

[0072] Example 7

[0073] A water-emulsion double-layer moisturizing lotion and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the emollient is a combination of jojoba seed oil and isododecane in a weight ratio of 2:1.

[0074] Example 8

[0075] A water-emulsion double-layer moisturizing lotion and a preparation method thereof, the specific implementation method is the same as that of Example 1, except that the emollient is jojoba seed oil and C 9-12The weight ratio of alkanes is 2:3.

[0076] Performance Testing

[0077] Shake the water-emulsion double-layer moisturizing water of Examples 1-8 evenly, and observe the appearance of the system after standing for 120-180 minutes. (Grade A is the best, and grade D is the worst)

[0078] Layering time and status:

[0079] Grade A: The water phase is transparent and there is no floating oil on the surface of the emulsion layer;

[0080] Grade B: The water phase is transparent, and there is slight oil floating on the surface of the emulsion layer

[0081] Grade C: The water phase is slightly translucent, and there is oil floating on the surface of the emulsion layer;

[0082] Grade D: The water phase is translucent and there is oil floating on the surface of the emulsion layer.

[0083] transparency:

[0084] Grade A: The water phase is basically transparent;

[0085] Grade B: The water phase is slightly turbid;

[0086] Grade C: The water phase is slightly turbid;

[0087] Grade D: The water phase is translucent.

[0088] The test results are shown in Table 1.

[0089] Table 1

[0090] Example 1 D D Example 2 A A Example 3 A B Example 4 C B Example 5 B C Example 6 B B Example 7 A A Example 8 C C

Claims

1. A double-layer moisturizing lotion, characterized in that: The raw materials for preparation include, by weight percentage, 1-5 parts of moisturizing agent, 1-6 parts of emollient, 0.1-5 parts of skin conditioning agent, 0.001-0.3 parts of chelating agent, and the solvent is supplemented to 100%.

2. The water-emulsion double-layer moisturizing lotion according to claim 1, characterized in that: The emollient comprises natural oil and synthetic oil, and the weight ratio of the natural oil to the synthetic oil is (1-3): (1-3).

3. The double-layer moisturizing water emulsion according to claim 2, characterized in that: The natural oil is a plant oil, and the plant oil is selected from at least one of jojoba seed oil, grape seed oil, wheat germ oil, camellia seed oil, and avocado oil.

4. The water-emulsion double-layer moisturizing lotion according to claim 2, characterized in that: The synthetic oil is an alkane or a glyceride, and the carbon number of the alkane is ≥9.

5. The water-emulsion double-layer moisturizing lotion according to claim 4, characterized in that: The alkane is selected from isododecane, isohexadecane, squalane, C 9-12 At least one of the alkanes.

6. The water-emulsion double-layer moisturizing lotion according to claim 4, characterized in that: The glyceride is selected from at least one of isopropyl lauroyl sarcosinate, caprylic / capric triglyceride, isopropyl myristate, decyl oleate, isopropyl palmitate, and cocoglyceryl.

7. The water-emulsion double-layer moisturizing lotion according to claim 1, characterized in that: The solvent includes water and an alcohol solvent, and the weight ratio of the water to the alcohol solvent is (70-90): (0.1-1).

8. The water-emulsion double-layer moisturizing lotion according to claim 1, characterized in that: The moisturizing agent includes at least one of glycerin, diglycerin, urea, sodium lactate, sodium hyaluronate, trehalose and propylene glycol.

9. The water-emulsion double-layer moisturizing lotion according to claim 1, characterized in that: The skin conditioning agent includes at least one of panthenol, glycolipids, hexylene glycol, sodium PCA, niacinamide, and hydrolyzed yeast extract.

10. A method for preparing the water-emulsion double-layer moisturizing water according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: adding solvent, moisturizer, skin conditioner and chelating agent into the reactor respectively, mixing and stirring, controlling the temperature to 50-70°C, and homogenizing at a medium speed of 2000-4000rpm for 1-10min; S2 adds emollient while homogenizing, and homogenizes at a high speed of 5000-7000rpm for 1-10min until the material is uniform.

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