Shell material, elastomer composition, dispersion system, application of dispersion system and skin care product

Abstract

The invention belongs to the technical field of cosmetics, and discloses a shell material for wrapping a water-soluble functional component, an elastomer composition comprising the shell material and a dispersion system comprising the elastomer composition. The shell material is prepared from a polydimethylsiloxane / vinyl trimethylsiloxy silicate ester cross-linked polymer and octyl polydimethylsiloxane ethyoxyl glucoside. Based on the special shell material, the composite material has two groups, namely an oleophylic siloxane group, a methyl group, an octyl group and a hydrophilic glucoside group at the same time, so that the composite material can be well connected with a water-soluble functional component and a shell material polydimethylsiloxane / vinyl trimethylsiloxy silicate ester cross-linked polymer; the stability and the dispersity of the water-soluble functional components are enhanced. Meanwhile, the invention further provides application of the dispersion system and a skin care product.

Description

Technical Field

[0001] The technical field of cosmetics discloses a shell material, an elastomer composition, a dispersion system and application thereof, and a skin care product. Background Art

[0002] Silicone elastomers have been widely used in personal care, textiles, construction and other fields. Especially in the field of personal care, silicone elastomers have excellent smooth touch, which can give skin care products good spreadability and smooth skin feel, so that consumers can have a comfortable experience when using the products. Its film-forming property can form a thin and breathable protective film on the surface of the skin, which plays a role in moisturizing and locking water and resisting external environmental damage. At the same time, it can also improve the stability of skin care products, prevent products from stratification, precipitation and other problems, and extend the shelf life of products.

[0003] However, due to the poor compatibility between silicone elastomers and water-based systems on the market, many water-soluble functional ingredients cannot be added to the formula. At the same time, water-soluble functional ingredients are easily hydrolyzed and ineffective in the presence of water, making it impossible for products with this formula system to meet the current market demand for functional skin care products.

[0004] Polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer is a newly launched silicone material with excellent performance on the market. The application of this material is in the initial stage of research. For details, please refer to the following literature: Patent application with publication number CN118662389A, the subject of which is a migration-resistant muddy lip cosmetic composition and a preparation method thereof, and patent application with publication number CN114867458A, the subject of which is an emulsified lip gel, using polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer as an elastomeric material; Patent applications with publication number CN117598932A, with the subject matter being a sunscreen synergistic composition, a water-in-oil high-factor sunscreen composition and a preparation method thereof, as well as patent applications with publication number CN116999346A, with the subject matter being a low-irritation, high-activity daytime eye cream and a preparation method thereof, and patent applications with publication number CN108135798A, with the subject matter being a color cosmetic composition with improved transfer adhesion and a preparation method thereof, using polydimethylsiloxane / vinyl trimethylsiloxysilicate crosslinked polymer as a film former; Patent application with publication number CN117357438A, the subject of which is an elastic lace powder paste and its preparation method, and patent application with publication number CN115919664A, the subject of which is ultrafine titanium dioxide and its preparation method, using polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer as a skin feel improver; The patent application with the publication number CN108938470A and the theme of an O / W / O multi-structured sunscreen BB cream and its preparation method uses a polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer as the outer oil phase of the oil-in-water-in-oil system.

[0005] From the above case analysis, it can be seen that the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer, as an excellent silicone material, can exist as an elastomer material, a film-forming material, a skin feel improving material, and an oil phase.

[0006] Regarding the problem of poor compatibility between silicone elastomers and water-soluble active ingredients, we have found through research that the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer can effectively solve this problem.

[0007] Based on this, the technical problem to be solved by the present invention is how to prepare a product with better dispersion of water-soluble active ingredients so that it can be used in a silicone elastomer system. Summary of the Invention

[0008] The purpose of the present invention is to provide a shell material for encapsulating water-soluble active ingredients, which can effectively encapsulate water-soluble active ingredients and be well compatible with silicone elastomers.

[0009] At the same time, the present invention also provides an elastomer composition, the use of this composition, and skin care products.

[0010] To achieve the above purpose, the present invention provides the following technical solutions: A shell material for encapsulating water-soluble active ingredients, the shell material comprising a polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer and octyl dimethicone ethoxyl glucoside, and the mass ratio of the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer to octyl dimethicone ethoxyl glucoside is 13-17:0.5-2.

[0011] In some inventions of the prior art, the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer is often used to directly encapsulate water-soluble active ingredients. Since the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer is an oil-phase component and the water-soluble active ingredients are in the water phase, when used together, the water-soluble active ingredients cannot be well dispersed in the oil phase, ultimately resulting in poor uniformity of the active ingredients of the product and extremely affecting the quality of the product.

[0012] In the present invention, octyl dimethicone ethoxy glucoside is added to the shell material encapsulating the water-soluble active ingredient. It has both lipophilic siloxane groups, methyl groups, octyl groups and hydrophilic glucoside groups, and can well connect the water-soluble active ingredient and the shell material polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer, enhancing the stability and dispersibility of the water-soluble active ingredient.

[0013] In addition, the present invention discloses an elastomer composition, comprising an elastomer and the above-mentioned shell material dispersed in the elastomer.

[0014] Preferably, the mass ratio of the elastomer to the shell material is 70-74:13.5-19; The elastomer is polydimethylsiloxane.

[0015] In addition, the present invention also discloses a dispersion system, comprising the above-mentioned elastomer composition and an aqueous phase encapsulated inside the shell material; the aqueous phase is a water-soluble active ingredient or an aqueous solution dissolving a water-soluble active ingredient.

[0016] Preferably, the aqueous phase does not exceed 15 wt% of the total weight of the dispersion system.

[0017] Preferably, the mass ratio of the water-soluble active ingredient to the shell material is 0.01-2:13.5-19.

[0018] Preferably, the water-soluble active ingredient is one or a combination of more of sodium hydrolyzed hyaluronate, sodium hyaluronate, VC, retinol.

[0019] In addition, the present invention also discloses the application of the above-mentioned dispersion system in the preparation of skin care products.

[0020] Finally, the present invention discloses a skin care product, containing 1 wt%-15 wt% of the above-mentioned dispersion system.

[0021] Preferably, the skin care product includes lotion, cream, spray, essence, essential oil, facial cleanser, facial mask.

[0022] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, octyl dimethicone ethoxy glucoside is added to the shell material encapsulating the water-soluble active ingredient. It has both lipophilic siloxane groups, methyl groups, octyl groups and hydrophilic glucoside groups, and can well connect the water-soluble active ingredient and the shell material polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer, enhancing the stability and dispersibility of the water-soluble active ingredient. Description of the Drawings

[0023] Figure 1 Microscopic image of Example 1; Figure 2 Photo of Example 1; Figure 3 Photo of Example 2; Figure 4 Photo of Example 3; Figure 5 Photo of Example 4; Figure 6 Microscopic image of Comparative Example 1; Figure 7 Photo of Comparative Example 1; Figure 8 Microscopic image of Comparative Example 2; Figure 9 Photo of Comparative Example 2; Figure 10 Photo of Comparative Example 3. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Product information: The polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer is purchased from Wacker Chemie (China) Co., Ltd.; Octyl dimethicone ethoxyl glucoside is purchased from Wacker Chemie (China) Co., Ltd.; Polydimethylsiloxane is purchased from Dow (Zhangjiagang) Investment Co., Ltd.; Butylene glycol is purchased from DAICEL CORPORATION; Sodium hyaluronate is purchased from Bloomage Biotechnology Co., Ltd.; Hydrolyzed sodium hyaluronate is purchased from Shandong Bloomage Biotechnology Co., Ltd.; CI 42090 is purchased from Shanghai Dyestuff Research Institute Co., Ltd.

[0026] The first part In order to fully characterize the dispersion effect of the shell material of the present invention in the elastomer, in the examples and comparative examples of the first part, a 1 wt% brilliant blue aqueous solution is used as the water-soluble active ingredient, which is co-encapsulated by the shell material together with the additionally added water; the dye in the brilliant blue aqueous solution is CI 42090; The formulation of the system is as follows: Elastomer composition: 90 wt%; Brilliant blue aqueous solution: 4 wt%; Water: 6 wt%.

[0027] The operating procedure is as follows: 1. First, mix the brilliant blue aqueous solution with deionized water and set aside. Then, take the pre-prepared elastomer composition in a beaker. The preparation method of the elastomer composition is: Mix and stir homogeneously polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer and octyl poly(dimethylsiloxane) ethoxyglycoside. 2. Start stirring at a speed of 300 rpm, and slowly add the aqueous solution to the elastomer composition in the beaker until the material completely wraps the aqueous solution.

[0028] The formulations of the dispersion systems of each example and comparative example are shown in Table 1; Table 1 Formulation table of dispersion system (mass ratio) Polydimethylsiloxane / Vinyltrimethoxysiloxysilicate Crosslinked Polymer Octylpolydimethylsiloxane Ethoxyglycoside Polydimethylsiloxane PEG-12 Polydimethylsiloxane Lauryl Glucoside Effect Icon Number Example 1 15 1 72 0 0 1，2 Example 2 13 0.5 70 0 0 3 Example 3 17 2 74 0 0 4 Example 4 13 2 70 0 0 5 Comparative Example 1 15 0 72 0 0 6，7 Comparative Example 2 15 0 72 1 0 8，9 Comparative Example 3 15 0 72 0 1 10

[0029] Performance testing Use the dyeing method to visually identify the water phase by dyeing. The test results are as Figures 1 to 7 shown; From Figures 1 to 5 it can be seen that the brilliant blue aqueous solution is very evenly dispersed and there is no phenomenon of water droplet agglomeration; it shows that within the formulation dosage range of the dispersion system of the technical solution of the present invention, after the water phase is specifically wrapped, it can be well dispersed in the oil phase; on the contrary, Figure 6 、 Figure 7 in which, the component octyl poly(dimethylsiloxane) ethoxyglycoside is not added to the formulation of the dispersion system, and the stability of the brilliant blue aqueous solution in the shell material becomes poor, and agglomeration is very likely to occur, resulting in a decrease in the dispersion effect.

[0030] In Comparative Example 2, PEG-12 polydimethylsiloxane is used to replace octyl poly(dimethylsiloxane) ethoxyglycoside, and in Comparative Example 3, lauryl glucoside is used to replace octyl poly(dimethylsiloxane) ethoxyglycoside. From Figures 8 to 10 it can be seen that even though both PEG-12 polydimethylsiloxane and lauryl glucoside have both lipophilic groups and hydrophilic groups, the dispersion effect of the brilliant blue aqueous solution is not good, and agglomeration also occurs.

[0031] In summary, in the dispersion system of the technical solution of the present invention, it is necessary to have the component of octyl poly dimethyl siloxane ethoxy glucoside, which has a siloxane group, an octyl group as a lipophilic group, and a glucoside group as a hydrophilic group. Based on this property, it can very well connect the water-soluble active ingredient and the shell material poly dimethyl siloxane / vinyl trimethyl siloxy silicate cross-linked polymer to enhance the stability and dispersibility of the water-soluble active ingredient.

[0032] The second part Verification of the dispersibility of other water-soluble active ingredients In this part, different water-soluble active ingredients and different dosages are verified. The specific method is to replace the brilliant blue aqueous solution with the water-soluble active ingredient, and the specific formula is referred to Table 2; the preparation method is referred to Example 1; Table 2 Formulation table (unit: g) Polydimethylsiloxane / Vinyltrimethoxysiloxysilicate Crosslinked Polymer Octylpolydimethylsiloxane Ethoxyglycoside Polydimethylsiloxane Sodium Hyaluronate Hydrolysate VC Retinol Water Example 5 15 1 72 0.01 0 0 Add up to 100 Example 6 15 1 72 1 0 0 Add up to 100 Example 7 15 1 72 2 0 0 Add up to 100 Example 8 15 1 72 0 0.1 0 Add up to 100 Example 9 15 1 72 0 0.2 0 Add up to 100 Example 10 15 1 72 0 0 0.2 Add up to 100

[0033] The external shape of the above dispersion system is similar to that of Example 1, and the overall appearance is colorless or the color of the water-soluble active ingredient itself. There are no obvious water droplets visually, and they are all relatively uniform elastomeric forms.

[0034] Application Example 1 A skin care product containing the elastomer composition of Example 1, and its formula is shown in Table 3; Table 3 Skin care product formulation table

[0035] The preparation method of the formulation shown in Table 3 is as follows: 1. Take a clean and dry beaker, add the raw materials of Phase A to the beaker in turn, heat to 80°C while stirring, and stir for 2 min; 2. Homogenize the material in the beaker (3000 r, 1 min), continue stirring and maintain 80°C; 3. Take a clean and dry container, add the raw materials of Phase B, stir and heat to 80°C until completely dissolved; 4. Add the material of Phase B to Phase A, stir for 2 min and homogenize (3000 r, 2 min); 5. Start to cool down, cool the material to 60°C, add the raw materials of Phase C to the beaker while stirring, stir for 2 min and homogenize (3000 r, 2 min); 6. Add the raw materials of Phase D to the beaker and stir for 5 min; 7. Add the raw materials of Phase E to the beaker, stir for 5 min and homogenize (3000 r, 2 min).

[0036] Application Example 2 A skin care product containing the elastomer composition of Example 1, and its formulation is shown in Table 4; Table 4 Skin Care Product Formulation Table

[0037] The preparation method of the formulation shown in Table 4 is as follows: 1. Take a clean and dry beaker, add the raw materials of Phase A to the beaker in sequence, heat to 80 °C while stirring, and stir for 5 min; 2. Homogenize the material in the beaker (3000 r, 2 min), continue stirring and maintain 80 °C; 3. Take a clean and dry container, add the raw materials of Phase B, stir and heat to 80 °C until completely dissolved; 4. Add the material of Phase B to Phase A, stir for 5 min and homogenize (3000 r, 3 min); 5. Start cooling, cool the material to 60 °C, add the raw materials of Phase C to the beaker while stirring, and stir for 5 min; 6. When the temperature drops below 45 °C, add the raw materials of Phase D to the beaker and stir for 5 min; 7. Add the raw materials of Phase E to the beaker, stir for 5 min and homogenize (3000 r, 2 min).

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A shell material for encapsulating a water-soluble functional ingredient, characterized in that: The shell material comprises polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer and octyl polydimethylsiloxane ethoxylated glucoside, and the mass ratio of the polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer to octyl polydimethylsiloxane ethoxylated glucoside is 13-17:0.5-2.

2. An elastomer composition, characterized in that The invention comprises an elastomer and the shell material as claimed in claim 1 dispersed in the elastomer.

3. The elastomer composition according to claim 2, characterized in that The mass ratio of the elastomer to the shell material is 70-74:13.5-19; The elastomer is polydimethylsiloxane.

4. A dispersed system, characterized in that: It comprises the elastomer composition as claimed in claim 2 or 3 and an aqueous phase encapsulated inside the shell material; the aqueous phase is a water-soluble functional ingredient or an aqueous solution in which a water-soluble functional ingredient is dissolved.

5. The dispersion system according to claim 4, characterized in that The aqueous phase does not exceed 15 wt % of the total weight of the dispersion.

6. The dispersion system according to claim 4, characterized in that The mass ratio of the water-soluble functional ingredient to the shell material is 0.01-2:13.5-19.

7. The dispersion system according to claim 4, characterized in that The water-soluble functional ingredient is one or more combinations of hydrolyzed sodium hyaluronate, sodium hyaluronate, VC, and retinol.

8. Use of the dispersion system according to any one of claims 4 to 7 in the preparation of skin care products.

9. A skin care product, characterized in that: Containing 1wt% to 5wt% of the dispersion system as described in any one of claims 4 to 7.

10. The skin care product according to claim 9, characterized in that: The skin care products include lotions, creams, sprays, essences, essential oils, cleansers and facial masks.

Images