Shell material, elastomer composition, dispersion system and its applications, skin care product

Abstract

The present invention belongs to the technical field of cosmetics, and discloses a shell material for encapsulating water-soluble active ingredients, an elastomer composition including the shell material, and a dispersion system including the elastomer composition. An aqueous phase is encapsulated within the shell material, and the shell material is composed of a polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer and octyl poly(dimethylsiloxane) ethoxylated glucoside. Based on this special shell material, it has both lipophilic siloxane groups, methyl groups, octyl groups, and hydrophilic glucoside groups, which can very well connect water-soluble active ingredients and the shell material polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer, enhancing the stability and dispersibility of water-soluble active ingredients. At the same time, the uses of the dispersion system and skin care products are also provided.

Description

Technical Field

[0001] In the field of cosmetics technology, a shell material, an elastomer composition, a dispersion system and its applications, and skin care products are disclosed. 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 an excellent smooth touch, can endow skin care products with good spreadability and smooth skin feel, enabling consumers to obtain a comfortable experience when using the products. Their film-forming property can form a thin and breathable protective film on the skin surface, playing a role in moisturizing and locking water, and resisting the invasion of the external environment. At the same time, it can also improve the stability of skin care products, prevent problems such as layering and precipitation of the products, and extend the product shelf life.

[0003] However, currently in the market, due to the poor compatibility of silicone elastomers with aqueous systems, many water-soluble active ingredients cannot be added to the formulation. At the same time, water-soluble active ingredients are prone to hydrolysis and inactivation in a water environment, making it impossible for the products of this formulation system to meet the market demand of current functional skin care products.

[0004] Polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer is a newly launched silicone material with relatively excellent properties in the market. The application of this material is in the initial stage of research. The specific details can be seen in the following documents:

[0005] A patent application with the publication number CN118662389A and the theme of an anti-migration mud-like lip cosmetic composition and its preparation method, and a patent application with the publication number CN114867458A and the theme of an emulsified lip gel, use polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer as an elastomer material;

[0006] A patent application with the publication number CN117598932A and the theme of a sunscreen synergistic composition, a water-in-oil high-fold sunscreen composition and its preparation method, a patent application with the publication number CN116999346A and the theme of a low-irritation high-activity day eye cream and its preparation method, and a patent application with the publication number CN108135798A and the theme of a makeup composition for improving stickiness and its preparation method, use polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer as a film-forming agent;

[0007] A patent application with the publication number CN117357438A and the theme of an elastic pull powder cream and its preparation method, and a patent application with the publication number CN115919664A and the theme of ultrafine titanium dioxide and its preparation method, use polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer as a skin feel improver;

[0008] The patent application with the publication number CN108938470A and the theme of an O / W / O multiple - structure 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.

[0009] 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.

[0010] Regarding the problem of poor compatibility between silicone elastomers and water - soluble active ingredients, through research, we found that the polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross - linked polymer can effectively solve this problem.

[0011] 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

[0012] 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.

[0013] Meanwhile, the present invention also provides an elastomer composition, the use of this composition, and skin care products.

[0014] To achieve the above purpose, the present invention provides the following technical solutions:

[0015] A shell material for encapsulating water - soluble active ingredients, the shell material comprises 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.

[0016] 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 homogeneity of the active ingredients of the product and extremely affecting the quality of the product.

[0017] In the present invention, octyl poly dimethylsiloxane 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 very well connect the water-soluble active ingredient and the shell material poly dimethylsiloxane / vinyl trimethyl siloxy silicate cross-linked polymer, enhancing the stability and dispersibility of the water-soluble active ingredient.

[0018] In addition, the present invention discloses an elastomer composition, comprising an elastomer and the above-mentioned shell material dispersed in the elastomer.

[0019] Preferably, the mass ratio of the elastomer to the shell material is 70-74:13.5-19;

[0020] The elastomer is polydimethylsiloxane.

[0021] 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 containing a water-soluble active ingredient.

[0022] Preferably, the aqueous phase does not exceed 15 wt% of the total weight of the dispersion system.

[0023] Preferably, the mass ratio of the water-soluble active ingredient to the shell material is 0.01-2:13.5-19.

[0024] Preferably, the water-soluble active ingredient is one or a combination of more of sodium hydrolyzed hyaluronate, sodium hyaluronate, VC, retinol.

[0025] In addition, the present invention also discloses the application of the above-mentioned dispersion system in the preparation of skin care products.

[0026] Finally, the present invention discloses a skin care product, containing 1 wt%-15 wt% of the above-mentioned dispersion system.

[0027] Preferably, the skin care product includes lotion, cream, spray, essence, essential oil, facial cleanser, facial mask.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] In the present invention, octyl poly dimethylsiloxane 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 very well connect the water-soluble active ingredient and the shell material poly dimethylsiloxane / vinyl trimethyl siloxy silicate cross-linked polymer, enhancing the stability and dispersibility of the water-soluble active ingredient. Description of the Drawings

[0030] Figure 1 Microscopic image of Example 1;

[0031] Figure 2 Photo of Example 1;

[0032] Figure 3 Photo of Example 2;

[0033] Figure 4 Photo of Example 3;

[0034] Figure 5 Photo of Example 4;

[0035] Figure 6 Microscopic image of Comparative Example 1;

[0036] Figure 7 Photo of Comparative Example 1;

[0037] Figure 8 Microscopic image of Comparative Example 2;

[0038] Figure 9 Photo of Comparative Example 2;

[0039] Figure 10 Photo of Comparative Example 3. Detailed implementation manners

[0040] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0041] Product information:

[0042] Polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer is purchased from Wacker Chemical (China) Co., Ltd.;

[0043] Octylpolydimethylsiloxane ethoxyglycoside is purchased from Wacker Chemical (China) Co., Ltd.;

[0044] Polydimethylsiloxane is purchased from Dow (Zhangjiagang) Investment Co., Ltd.;

[0045] Butanediol is purchased from DAICEL CORPORATION;

[0046] Sodium hyaluronate is purchased from Bloomage Biotechnology Corporation Limited;

[0047] Sodium hyaluronate hydrolyzate was purchased from Shandong Bloomage Biotechnology Co., Ltd.;

[0048] CI 42090 was purchased from Shanghai Dye Research Institute Co., Ltd.

[0049] The first part

[0050] 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 was used as the water-soluble active ingredient, which was co-coated with the shell material together with the additionally added water; the dye in the brilliant blue aqueous solution was CI 42090;

[0051] The formulation of the system was as follows:

[0052] Elastomer composition 90 wt%;

[0053] Brilliant blue aqueous solution 4 wt%;

[0054] Water 6 wt%.

[0055] The operating procedure was as follows:

[0056] 1. First, mix the brilliant blue aqueous solution with deionized water and set aside for use, and then take the pre-prepared elastomer composition in a beaker;

[0057] The preparation method of the elastomer composition was: mix and stir homogeneously polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer and octyl poly(dimethylsiloxane) ethoxyglycoside;

[0058] 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.

[0059] The formulations of the dispersion systems of each example and comparative example are shown in Table 1;

[0060] Table 1 Formulation table of dispersion system (mass ratio)

[0061] Polydimethylsiloxane / Vinyltrimethoxysiloxysilicate Crosslinked Polymer Octyl Polydimethylsiloxane 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

[0062] Performance detection

[0063] Use the dyeing method to visually identify the water phase by dyeing, and the test results are as Figures 1 to 7 shown;

[0064] 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 aggregation; 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 coated, it can be well dispersed in the oil phase; on the contrary Figure 6 , Figure 7, in the formulation of its dispersion system, the component of octyl dimethicone ethoxylated glucoside is not added, 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.

[0065] In Comparative Example 2, PEG-12 dimethicone was used to replace octyl dimethicone ethoxylated glucoside, and in Comparative Example 3, lauryl glucoside was used to replace octyl dimethicone ethoxylated glucoside. From Figures 8 to 10 It can be seen that even though both PEG-12 dimethicone and lauryl glucoside have lipophilic groups and hydrophilic groups, the dispersion effect of the brilliant blue aqueous solution is not good, and agglomeration also occurs.

[0066] In summary, in the dispersion system of the technical solution of the present invention, the component of octyl dimethicone ethoxylated glucoside must be present. It has a siloxane group, an octyl group lipophilic group, and a glucoside group hydrophilic group. Based on this property, it can very well connect the water-soluble active ingredient and the shell material of polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer to enhance the stability and dispersion of the water-soluble active ingredient.

[0067] The second part

[0068] Verification of the dispersion of other water-soluble active ingredients

[0069] In this part, different water-soluble active ingredients and different dosages were verified. The specific method was to use the water-soluble active ingredient to replace the brilliant blue aqueous solution, and its specific formulation was referred to Table 2; the preparation method was referred to Example 1;

[0070] Table 2 Formulation table (unit: g)

[0071] Polydimethylsiloxane / Vinyltrimethoxysiloxysilicate Crosslinked Polymer Octyl Polydimethylsiloxane Ethoxyglycoside Polydimethylsiloxane Sodium Hyaluronate Hydrolysate VC Retinol Water Example 5 15 1 72 0.01 0 0 Added to 100 Example 6 15 1 72 1 0 0 Added to 100 Example 7 15 1 72 2 0 0 Added to 100 Example 8 15 1 72 0 0.1 0 Added to 100 Example 9 15 1 72 0 0.2 0 Added to 100 Example 10 15 1 72 0 0 0.2 Added to 100

[0072] The external form 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 in a relatively uniform elastomeric form.

[0073] Application Example 1

[0074] A skin care product containing the elastomeric composition of Example 1, and its formulation is shown in Table 3;

[0075] Table 3 Skin care product formulation table

[0076]

[0077] The preparation method of the formulation shown in Table 3 is as follows:

[0078] 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 2 min;

[0079] 2. Homogenize the material in the beaker (3000 r, 1 min), continue stirring and maintain 80°C;

[0080] 3. Take a clean and dry container, add the raw materials of Phase B, stir and heat to 80°C until completely dissolved;

[0081] 4. Add the material of Phase B to Phase A, stir for 2 min and homogenize (3000 r, 2 min);

[0082] 5. Start cooling, 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);

[0083] 6. Add the raw materials of Phase D to the beaker and stir for 5 min;

[0084] 7. Add the raw materials of Phase E to the beaker, stir for 5 min and homogenize (3000 r, 2 min).

[0085] Application Example 2

[0086] A skin care product contains the elastomer composition of Example 1, and its formula is shown in Table 4;

[0087] Table 4 Skin Care Product Formula Table

[0088]

[0089] The preparation method of the formula shown in Table 4 is as follows:

[0090] 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;

[0091] 2. Homogenize the material in the beaker (3000 r, 2 min), continue stirring and maintain 80°C;

[0092] 3. Take a clean and dry container, add the raw materials of Phase B, stir and heat to 80°C until completely dissolved;

[0093] 4. Add the material of Phase B to Phase A, stir for 5 min and homogenize (3000 r, 3 min);

[0094] 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;

[0095] 6. When the temperature drops below 45°C, add the raw materials of Phase D to the beaker and stir for 5 min;

[0096] 7. Add the raw material of phase E into a beaker, stir for 5 min and homogenize (3000 r, 2 min).

[0097] 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-restrictive. 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 construed as limiting the claims involved.

Claims

1. A dispersed system, characterized in that It consists of an elastomer composition and an aqueous phase encapsulated in a shell material; the aqueous phase is a water-soluble functional ingredient or an aqueous solution containing a water-soluble functional ingredient; The shell material comprises polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer and octyl polydimethylsiloxane ethoxy glucoside, wherein the mass ratio of the polydimethylsiloxane / vinyl trimethylsiloxysilicate cross-linked polymer to octyl polydimethylsiloxane ethoxy glucoside is 13-17:0.5-2; The elastomer composition includes an elastomer and a shell material dispersed in the elastomer, wherein the mass ratio of the elastomer to the shell material is 70-74:13.5-19; the elastomer is polydimethylsiloxane, and the aqueous phase does not exceed 15wt% of the total weight of the dispersed system.

2. The dispersion system according to claim 1, characterized in that The mass ratio of the water-soluble functional component to the shell material is 0.01-2:13.5-19.

3. The dispersion system according to claim 1, characterized in that The water-soluble functional ingredient is one or more combinations of hydrolyzed sodium hyaluronate, sodium hyaluronate, and VC.

4. Use of the dispersion system according to any one of claims 1 to 3 in the preparation of skin care products.

5. A skin care product, characterized in that: Containing 1 wt% to 5 wt% of the dispersion system according to any one of claims 1 to 3.

6. The skin care product according to claim 5, characterized in that The skin care products include lotions, creams, sprays and essential oils.

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