A sunscreen skin care composition containing mucus of mallow rhizome stem and a method for preparing the same

Abstract

The application discloses a sunscreen skin care composition containing mucus of hibiscus root stem and a preparation method thereof, and the sunscreen skin care composition containing mucus of hibiscus root stem comprises the following components in percentage by mass: 0.1%-20% of mucus of hibiscus root stem, 1%-30% of sunscreen agent, and a cosmetic base comprising an emulsifier and a humectant, wherein the mass percentage of the mucus of hibiscus root stem is 5%-10%, the sunscreen agent is a physical sunscreen agent, a chemical sunscreen agent or a combination thereof, the physical sunscreen agent is at least one of nano titanium dioxide and nano zinc oxide, and the chemical sunscreen agent is at least one of ethylhexyl methoxy cinnamate and butyl methoxydibenzoylmethane. The sunscreen skin care composition containing mucus of hibiscus root stem has the effects of soothing, moisturizing, repairing and sunscreen, can form a protective film on the surface of the skin, reduces water loss, and simultaneously relieves skin inflammatory reactions caused by ultraviolet irradiation.

Description

Technical Field

[0001] This invention relates to the field of daily cosmetics technology, specifically to a sunscreen skincare composition containing marshmallow root and stem mucilage and its preparation method. Background Technology

[0002] Ultraviolet (UV) radiation is one of the main environmental factors leading to photoaging, pigmentation, sunburn, and skin cancer. With increasing consumer awareness of sun protection, sunscreen cosmetics have become essential in daily skincare. Currently, sunscreen products are mainly divided into two categories: chemical sunscreens and physical sunscreens. While chemical sunscreens offer significant sun protection, some ingredients have poor photostability and can easily cause skin allergies. Physical sunscreens are generally safer, but their effectiveness is limited when used alone, and they can easily cause white cast and a heavy feel on the skin. Existing sunscreen products often have only one function, making it difficult to simultaneously meet multiple skincare needs such as sun protection, moisturizing, soothing, and repair. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a sunscreen skin care composition containing marshmallow root and stem mucilage and its preparation method, which has the effects of soothing, moisturizing, repairing and sun protection. It can form a protective film on the skin surface, reduce moisture loss, and relieve skin inflammation caused by ultraviolet radiation, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A sunscreen skincare composition containing marshmallow root and stem mucilage, comprising, by weight percentage: 0.1%–20% marshmallow root and stem mucilage, 1%–30% sunscreen agent, and a cosmetic matrix, said cosmetic matrix comprising emulsifier and moisturizer.

[0005] Preferably, the mass percentage of the almond root and stem mucilage is 5% to 10%.

[0006] Preferably, the sunscreen agent is a physical sunscreen agent, a chemical sunscreen agent, or a combination thereof. The physical sunscreen agent is at least one of nano titanium dioxide and nano zinc oxide, and the chemical sunscreen agent is at least one of ethylhexyl methoxycinnamate and butyl methoxydibenzoylmethane.

[0007] Preferably, the emulsifier is at least one of cetearyl alcohol ether-2, cetearyl alcohol ether-21, and glyceryl monostearate, and the humectant is at least one of glycerin, butylene glycol, and hyaluronic acid.

[0008] Preferably, the sunscreen skincare composition containing marshmallow root and stem mucilage further includes a skin-soothing and repairing ingredient, wherein the skin-soothing and repairing ingredient is at least one of centella asiatica extract, allantoin, and panthenol, and the mass percentage of the skin-soothing and repairing ingredient is 0.1% to 2%.

[0009] The method for preparing the sunscreen skincare composition containing marshmallow root and stem mucilage includes the following steps: S1. Preparation of hollyhock extract: After washing and crushing the hollyhock rhizomes, add the extraction solvent and heat to extract, then separate the solid and liquid to obtain an extract containing the mucilage of the hollyhock rhizomes; S2. Preparation of the oil phase: The oil phase components are heated to a first temperature and stirred to dissolve, resulting in an oil phase mixture; S3. Preparation of aqueous phase: Mix the aqueous phase component with the extract obtained in step S1, heat to the first temperature and stir evenly to obtain an aqueous phase mixture; S4. Emulsification: The oil phase mixture is added to the aqueous phase mixture for homogenization and emulsification, followed by cooling; S5. Preparation: After cooling to the second temperature, add the sunscreen agent and other optional active ingredients, stir and mix evenly to obtain the sunscreen skincare composition.

[0010] Preferably, in step S1, the extraction solvent is water or an aqueous ethanol solution with a volume fraction of 10% to 70%; the heating extraction temperature is 40℃ to 100℃, and the time is 0.5h to 6h.

[0011] Preferably, in steps S2 and S3, the first temperature is 70°C to 85°C; in step S5, the second temperature is 40°C to 50°C.

[0012] Preferably, in step S4, the rotation speed of the homogenization emulsification is 2000 rpm to 5000 rpm, and the time is 3 min to 10 min. In step S5, when the sunscreen agent contains a chemical sunscreen agent, it is added after cooling to the second temperature.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Naturally sourced and highly safe: The mucilage from the roots and stems of the hollyhock is derived from natural plants, possessing excellent biocompatibility and safety, thus avoiding skin irritation and allergic reactions that may be caused by chemically synthesized ingredients; 2. Synergistic effects of multiple functions: This invention utilizes the multiple properties of the mucilage of the hollyhock root and stem, which have the functions of ultraviolet absorption, moisturizing film formation and soothing repair. The composition prepared by compounding it with sunscreen agents has four functions: sun protection, moisturizing, soothing and repair, which overcomes the shortcomings of existing sunscreen products with single functions. 3. Enhanced sun protection effect: The SPF value of the composition containing marshmallow root and stem mucilage was significantly higher than that of the control group without this ingredient, confirming its synergistic effect with sunscreen agents; 4. Excellent skin feel: The polysaccharides in the mucilage of the marshmallow root and stem have excellent film-forming and moisturizing properties, giving the product a light and breathable feel, solving the problems of whitening and heaviness of traditional physical sunscreens. Detailed Implementation

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] This invention provides a technical solution: A sunscreen skincare composition containing marshmallow root and stem mucilage, comprising, by weight percentage: 0.1%–20% marshmallow root and stem mucilage, 1%–30% sunscreen agent, and a cosmetic matrix, the cosmetic matrix including emulsifiers and moisturizers.

[0016] The mass percentage of mucilage in the rhizome of hollyhock is 5% to 10%.

[0017] The sunscreen agent is a physical sunscreen agent, a chemical sunscreen agent, or a combination thereof. The physical sunscreen agent is at least one of nano titanium dioxide and nano zinc oxide, and the chemical sunscreen agent is at least one of ethylhexyl methoxycinnamate and butyl methoxydibenzoylmethane.

[0018] The emulsifier is at least one of cetearyl alcohol ether-2, cetearyl alcohol ether-21, and glyceryl monostearate, and the moisturizer is at least one of glycerin, butylene glycol, and hyaluronic acid.

[0019] The sunscreen skincare composition containing marshmallow root and stem mucilage also includes skin-soothing and repairing ingredients, which are at least one of centella asiatica extract, allantoin, and panthenol, and the mass percentage of the skin-soothing and repairing ingredients is 0.1% to 2%.

[0020] A method for preparing a sunscreen skincare composition containing marshmallow root and stem mucilage includes the following steps: S1. Preparation of hollyhock extract: After washing and crushing the hollyhock rhizomes, add the extraction solvent and heat to extract, then separate the solid and liquid to obtain an extract containing the mucilage of the hollyhock rhizomes; S2. Preparation of the oil phase: The oil phase components are heated to a first temperature and stirred to dissolve, resulting in an oil phase mixture; S3. Preparation of aqueous phase: Mix the aqueous phase component with the extract obtained in step S1, heat to the first temperature and stir evenly to obtain an aqueous phase mixture; S4. Emulsification: The oil phase mixture is added to the aqueous phase mixture for homogenization and emulsification, followed by cooling; S5. Preparation: After cooling to the second temperature, add sunscreen and other optional active ingredients, stir and mix evenly to obtain the sunscreen skincare composition.

[0021] In step S1, the extraction solvent is water or an aqueous ethanol solution with a volume fraction of 10% to 70%; the extraction temperature is 40℃ to 100℃, and the extraction time is 0.5h to 6h.

[0022] In steps S2 and S3, the first temperature is 70℃~85℃; in step S5, the second temperature is 40℃~50℃.

[0023] In step S4, the rotation speed for homogenization emulsification is 2000 rpm to 5000 rpm, and the time is 3 min to 10 min. In step S5, when the sunscreen contains chemical sunscreen, it is added after cooling to the second temperature. Example

[0024] This embodiment provides a sunscreen skincare composition (lotion) containing marshmallow root and stem mucilage, the formulation of which is shown in the table below by weight percentage: Components Quality percentage (%) Adding stage Mucilage from hollyhock rhizomes (8% solids) 8.0 Aqueous phase Nano titanium dioxide 3.0 oil phase Nano zinc oxide 4.0 oil phase dimethylsiloxane 3.0 oil phase Caprylic / Capric Triglycerides 2.0 oil phase C12-15 benzoate 2.0 oil phase Glyceryl monostearate 2.5 oil phase stearic acid 0.8 oil phase Cetearyl alcohol ether-2 2.5 oil phase Cetearyl alcohol ether-21 1.5 oil phase glycerin 5.0 Aqueous phase Butylene glycol 3.0 Aqueous phase Centella Asiatica extract 0.5 Add after low temperature Allantoin 0.2 Add after low temperature Methylparaben 0.15 Aqueous phase propylparaben 0.08 oil phase Deionized water margin Aqueous phase Preparation method: S1. Preparation of Hollyhock Extract: Take Hollyhock rhizomes, remove impurities, wash thoroughly, and crush to a particle size ≤1mm. Add 10 times the weight of deionized water and heat at 80℃ for 2 hours. After extraction, filter through a 200-mesh filter cloth and collect the filtrate to obtain an extract containing Hollyhock rhizome mucilage (solid content approximately 8%).

[0025] S2. Preparation of oil phase: Weigh each component of the oil phase according to the formula, add them to the oil phase pot, heat to 80°C, and stir until completely dissolved to obtain an oil phase mixture.

[0026] S3. Preparation of aqueous phase: Weigh each component of the aqueous phase according to the formula (except for the component added after low temperature), add it to the aqueous phase pot, heat to 80℃, stir evenly, and obtain an aqueous phase mixture.

[0027] S4. Emulsification: Under stirring conditions, slowly add the oil phase mixture to the aqueous phase mixture and homogenize and emulsify at 3000 rpm for 5 minutes. After emulsification is complete, begin cooling.

[0028] S5. Preparation: When the temperature drops to 45℃, add Centella Asiatica extract and allantoin, stir well, continue stirring and cool to room temperature to obtain a sunscreen lotion containing marshmallow root and stem mucilage. Example

[0029] This embodiment provides a sunscreen skincare composition (sunscreen) containing marshmallow root and stem mucilage, the formulation of which is shown in the table below by weight percentage: Components Quality percentage (%) Adding stage Mucilage from hollyhock rhizomes (10% solids) 12.0 Aqueous phase Ethylhexyl methoxycinnamate 5.0 Add after low temperature Butylmethoxydibenzoylmethane 2.0 Add after low temperature Nano titanium dioxide 2.0 oil phase dimethylsiloxane 4.0 oil phase Caprylic / Capric Triglycerides 3.0 oil phase Glyceryl monostearate 2.0 oil phase Cetearyl alcohol ether-2 2.0 oil phase Cetearyl alcohol ether-21 1.5 oil phase Hexadecyl / octadecyl alcohol mixture 1.0 oil phase glycerin 5.0 Aqueous phase Hyaluronic acid 0.05 Aqueous phase Panthenol 0.5 Add after low temperature Allantoin 0.2 Add after low temperature Phenoxyethanol 0.5 Add after low temperature Deionized water margin Aqueous phase Preparation method: S1. Preparation of Hollyhock Extract: Hollyhock rhizomes were crushed to a particle size ≤1mm. Eight times their weight of a 30% (v / v) ethanol aqueous solution were added, and the mixture was heated at 75℃ for 3 hours. After filtration, the extract was concentrated under reduced pressure to half its original volume to obtain the extract (solid content approximately 10%).

[0030] S2-S4 are the same as in Example 1, except that the homogenization emulsification speed is 3500 rpm and the time is 6 minutes.

[0031] S5. Preparation: When the temperature drops to 45°C, add ethylhexyl methoxycinnamate, butyl methoxydibenzoylmethane, panthenol, allantoin and phenoxyethanol, stir well, and cool to room temperature to obtain the final product. Example

[0032] This embodiment provides a sunscreen skincare composition (gel) containing marshmallow root and stem mucilage, the formulation of which is as follows by weight percentage: marshmallow root and stem mucilage (6% solids) 5.0%, nano zinc oxide 5.0%, glycerin 8.0%, butylene glycol 5.0%, carbomer 940 0.5%, triethanolamine 0.4%, centella asiatica extract 0.3%, allantoin 0.1%, phenoxyethanol 0.5%, and deionized water balance.

[0033] Preparation method: Mix the aqueous phase components (except for the neutralizing agent and the added components) with the marshmallow extract, heat to 75°C to allow the carbomer to swell; cool to 45°C and neutralize to pH 6.0-7.0 with triethanolamine, then add nano zinc oxide and the remaining added components, and stir until homogeneous to obtain the final product.

[0034] Comparative Example 1 This comparative example provides a sunscreen skincare composition that does not contain marshmallow root and stem mucilage. Its formulation is essentially the same as in Example 1, except that an equal amount of deionized water is used instead of the marshmallow root and stem mucilage extract. The preparation method is the same as in Example 1.

[0035] Sun protection performance test (SPF value determination) Following the method for determining sun protection factor (SPF) in the "Cosmetic Safety Technical Specifications," an SPF-290S sun protection factor analyzer was used for in vitro determination. Each sample was measured three times, and the average value was taken. The results are shown in Table 1.

[0036] Table 1. SPF values ​​of each embodiment and comparative example. sample SPF value Example 1 28.6±0.8* Example 2 32.4±1.1* Example 3 22.1±0.6* Comparative Example 1 18.3±0.5 Note: * indicates P < 0.05 compared to Comparative Example 1. The results show that the addition of almond root and stem mucilage significantly improved the sun protection effect of the composition, confirming a synergistic effect.

[0037] Moisturizing performance test Thirty healthy volunteers (aged 25–45 years) were selected. After acclimatizing in a constant temperature and humidity chamber for 30 minutes, an equal amount of sample (2 mg / cm²) was applied to the inner forearm. The change rate of skin stratum corneum moisture content before and after application was measured using a Corneometer CM825. The results are shown in Table 2.

[0038] Table 2. Change rate of skin moisture content (%) sample 1h 2h 4h Example 1 +35.2±2.1 +28.6±1.8 +18.4±1.5 Example 2 +38.7±2.3 +31.2±2.0 +20.1±1.6 Example 3 +32.5±1.9 +25.8±1.7 +15.6±1.3 Comparative Example 1 +18.6±1.5 +12.3±1.2 +5.8±0.9 The results showed that the moisturizing effect and durability of the Example Group were significantly better than those of Comparative Example 1.

[0039] Soothing and Repairing Performance Test The zebrafish embryonic inflammation model was used for evaluation. The UVB irradiation dose was 100 mJ / cm², and the cells were immediately treated with sample solution after irradiation. The inhibition rate of inflammatory cell aggregation in the tail was calculated after 24 hours. The inflammation inhibition rate in Example 1 group was 62.8% ± 3.2%, while that in Comparative Example 1 group was 31.5% ± 2.8%, with a significant difference (P < 0.05). The experimental procedure complied with relevant animal welfare guidelines.

[0040] The sample from Example 1 was placed under high temperature (40±1℃), low temperature (-10±1℃), and room temperature (25±1℃) conditions for 6 months. The results showed that the sample maintained a uniform white emulsion appearance under all conditions, the pH value fluctuated between 6.0 and 6.2, and the viscosity change rate was less than 10%, indicating that the composition has good stability.

[0041] The sunscreen skincare composition containing marshmallow root and stem mucilage and its preparation method provided by this invention have widely available and low-cost raw materials, and the preparation process is simple and controllable, making it suitable for large-scale industrial production. The resulting composition has multiple functions including sun protection, moisturizing, soothing, and repairing, and can be widely used in various skincare products as a daytime protective lotion, makeup primer, or after-sun repair essence.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sunscreen and skincare composition containing marshmallow root and stem mucilage, characterized in that, By weight percentage, it comprises the following components: 0.1% to 20% hollyhock root and stem mucilage, 1% to 30% sunscreen, and a cosmetic matrix, which includes emulsifiers and moisturizers.

2. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 1, characterized in that, The mass percentage of the mucilage from the hollyhock rhizome is 5% to 10%.

3. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 1, characterized in that, The sunscreen agent is a physical sunscreen agent, a chemical sunscreen agent, or a combination thereof. The physical sunscreen agent is at least one of nano titanium dioxide and nano zinc oxide, and the chemical sunscreen agent is at least one of ethylhexyl methoxycinnamate and butyl methoxydibenzoylmethane.

4. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 1, characterized in that, The emulsifier is at least one of cetearyl alcohol ether-2, cetearyl alcohol ether-21, and glyceryl monostearate, and the moisturizer is at least one of glycerin, butylene glycol, and hyaluronic acid.

5. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 1, characterized in that, It also includes skin-soothing and repairing ingredients, wherein the skin-soothing and repairing ingredients are at least one of Centella Asiatica extract, allantoin, and panthenol, and the mass percentage of the skin-soothing and repairing ingredients is 0.1% to 2%.

6. A method for preparing a sunscreen skincare composition containing marshmallow root and stem mucilage as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Preparation of hollyhock extract: After washing and crushing the hollyhock rhizomes, add the extraction solvent and heat to extract, then separate the solid and liquid to obtain an extract containing the mucilage of the hollyhock rhizomes; S2. Preparation of the oil phase: The oil phase components are heated to a first temperature and stirred to dissolve, resulting in an oil phase mixture; S3. Preparation of aqueous phase: Mix the aqueous phase component with the extract obtained in step S1, heat to the first temperature and stir evenly to obtain an aqueous phase mixture; S4. Emulsification: The oil phase mixture is added to the aqueous phase mixture for homogenization and emulsification, followed by cooling; S5. Preparation: After cooling to the second temperature, add the sunscreen agent and other optional active ingredients, stir and mix evenly to obtain the sunscreen skincare composition.

7. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 6, characterized in that, In step S1, the extraction solvent is water or an aqueous solution of ethanol with a volume fraction of 10% to 70%; the heating extraction temperature is 40℃ to 100℃, and the time is 0.5h to 6h.

8. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 6, characterized in that, In steps S2 and S3, the first temperature is 70℃~85℃; in step S5, the second temperature is 40℃~50℃.

9. The sunscreen and skincare composition containing marshmallow root and stem mucilage according to claim 6, characterized in that, In step S4, the rotation speed of the homogenization emulsification is 2000 rpm to 5000 rpm, and the time is 3 min to 10 min. In step S5, when the sunscreen agent contains a chemical sunscreen agent, it is added after cooling to the second temperature.