Camellia flower composition with waterproof, anti-sweat and photo-thermal multiplication effects as well as preparation method and application of camellia flower composition

Abstract

The invention discloses a camellia flower composition with waterproof, anti-sweat and photo-thermal multiplication effects as well as a preparation method and application of the camellia flower composition. The camellia flower composition is prepared from a camellia extract, polydimethylsiloxane, a physical sun-screening agent, C12-15 alcohol benzoate, a water-in-oil emulsifier, trimethylsiloxy silicate ester, modified disteardimonium hectorite, silica, a spirulina platensis extract, glucosylrutin, p-hydroxyacetophenone, 1, 2-hexanediol and water. The invention discloses a preparation method of the camellia flower composition and application of the camellia flower composition in preparation of skin care or sunscreen products of cream or emulsion. The camellia flower composition can quickly and uniformly form a film on the surface of skin, improves the absorbance and sunscreen efficiency of a product at a specific wavelength, enhances the waterproof, sweat-proof and heat-proof effects, and also has the effects of changing the wavelength of ultraviolet rays, converting harmful light in the ultraviolet rays into light beneficial to the skin and further converting the light into cell energy, so that the skin-care effect is improved. The effects of promoting collagen generation, relieving and repairing and the like are achieved.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and more specifically, to a camellia composition with waterproof and sweat-resistant properties and photothermal synergistic effects, as well as its preparation method and application. Background Technology

[0002] Camellia, a plant belonging to the genus Camellia in the family Theaceae, was first recorded in the *Compendium of Materia Medica* and is also known as tea flower. Camellia extract contains abundant active ingredients such as flavonoids, polyphenols, saponins, vitamin C, amino acids, alkaloids, and polysaccharides. Camellia extract can promote fibroblast repair, has a repairing effect on the skin's surface barrier, and possesses excellent anti-free radical capabilities. It can effectively inhibit melanin formation, lighten dark spots, and brighten skin tone. It can also promote collagen synthesis, inhibit elastase activity, and has anti-wrinkle and firming effects on the skin. Furthermore, it has inhibitory effects on hyaluronidase, inflammatory factors TNF-α, and IL-6, providing excellent soothing effects. Currently, camellia extract is widely used in food, pharmaceuticals, health products, and cosmetics. With increasing attention to natural plant extracts, the market prospects for camellia extract are expected to be even broader.

[0003] UVA, a segment of ultraviolet (UV) radiation, ranges from 320 to 400 nm. It has strong penetrating power, reaching the dermis and damaging elastic and collagen fibers, leading to tanning. UVB, with a wavelength of 280-320 nm, is also harmful to skin; prolonged exposure can cause erythema, peeling, and sunburn. Meanwhile, blue light in the visible light band (400-500 nm) penetrates even deeper, reaching the dermis and causing the production of reactive oxygen species, leading to skin aging and a range of other skin damage.

[0004] Sunscreen factor (SPF) is a key indicator of a sunscreen's protective ability. Sunscreen products consist of physical and chemical sunscreens. To achieve a high SPF, sunscreens need to contain more sunscreen ingredients. These ingredients form a protective film on the skin's surface to prevent UV damage. In other words, generally, the higher the SPF, the more sunscreen ingredients are used. These ingredients are usually quite oily and tend to form a thick protective layer on the skin, making it feel greasy. Furthermore, high SPF sunscreens with excessive chemical sunscreens are not suitable for sensitive skin, increasing the burden on the skin and making it more prone to irritation. This can cause irritation and allergic reactions in sensitive skin, resulting in a poor user experience and often reducing consumers' willingness to purchase.

[0005] The primary function of sunscreen is to block harmful ultraviolet (UV) rays. When people are outdoors, their skin is exposed to strong sunlight for extended periods, and activities such as swimming, diving, rafting, and strenuous exercise generate a lot of sweat. This sweat can wash away some of the effective ingredients in sunscreen or damage the protective film, significantly reducing its effectiveness. Therefore, consumers need to frequently reapply sunscreen, which is inconvenient. Furthermore, in practical applications, multiple applications of sunscreen can feel sticky and heavy, negatively impacting the user experience and failing to meet actual needs.

[0006] In conclusion, there is an urgent need to develop a new technical solution to address the problems existing in the current technology and meet the development needs of the current market. Summary of the Invention

[0007] To address the aforementioned technical problems, the present invention aims to provide a camellia composition with waterproof and sweat-resistant properties and photothermal synergistic effects, as well as its preparation method and application, so as to reduce the amount of sunscreen agent used while improving sun protection efficacy (SPF value, PFA value).

[0008] Ultraviolet (UV) radiation from sunlight is a major cause of skin aging. Effective anti-photodamage technology can delay skin aging, a significant trend in current beauty and skincare. Converting harmful UV rays into beneficial light not only reduces the damage caused by harmful light but also utilizes the converted light for beauty and skincare, achieving a dual effect of protection and beautification. This invention discovers that a combination of camellia extract, spirulina extract, and glucosylrutin, when compared to a blank sample, can enhance the suppression of blue light wavelengths in the 400-500nm visible light band. Under excitation light of 280nm-500nm, it can convert UV radiation into green, yellow, and red light with wavelengths in the 500nm-760nm range. When added to sunscreen products, it has a synergistic effect with oxidizing components in absorbing and converting UV light, while also enhancing antioxidant capacity and providing a soothing effect. The composition of the present invention is mild and non-irritating, and can swell in oil to form a thixotropic gel, preventing phase separation. When added to oil-in-water creams, it can improve their stability, and when added to water-in-water creams, it can improve their water resistance and moisturizing properties.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] In a first aspect, the present invention provides a camellia composition with waterproof and sweat-resistant properties and photothermal synergistic effects, comprising the following components in weight percentages: Camellia extract 0.1~10.0%, Polydimethylsiloxane 1.0~50.0%, Physical sunscreens 1-50.0%, C12-15 alcohol benzoate 0.5~10.0%, Water-in-oil emulsifier 0.5~10.0%, Trimethylsilyloxysilicate 0.1~5.0%, Modified distearate dimethylammonium lithium montmorillonite 0.5~12.0%, Silica 0.1~10.0%, Spirulina bonata extract 0.001~1.0%, Glucosylrutin 0.001~1.0%, p-Hydroxyacetophenone 0.1~1.0%, 1,2-Hexanediol 0.1~1.0%, Water TO 100%.

[0011] As some specific embodiments of the present invention, the camellia extract contains water, 1,3-propanediol, camellia flower extract and camellia leaf extract, with a mass ratio of 50-70:20-30:1-10:1-10.

[0012] As some specific embodiments of the present invention, the viscosity of the polydimethylsiloxane at 25°C is 1.5~6 mm. 2 / s.

[0013] As some specific embodiments of the present invention, the physical sunscreen agent is selected from at least one of modified titanium dioxide and modified zinc oxide.

[0014] Furthermore, the modified titanium dioxide is obtained by hydrophobic treatment of titanium dioxide, and the modified zinc oxide is obtained by hydrophobic treatment of zinc oxide.

[0015] Furthermore, the average particle size of the titanium dioxide and / or zinc oxide is 10 nm to 200 nm.

[0016] Furthermore, the surface treatment agent for hydrophobic treatment of titanium dioxide and / or zinc oxide is selected from one or more of aluminum hydroxide, aluminum oxide, stearic acid, aluminum stearate, hydrogenated polydimethylsiloxane, triethoxyoctylsilane, and polydimethylsiloxane.

[0017] As some specific embodiments of the present invention, the water-in-oil emulsifier is selected from at least one of polyglycerol-3 diisostearate, lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, and PEG-10 polydimethylsiloxane, and the HLB value of the water-in-oil emulsifier is between 3 and 8.

[0018] As some specific embodiments of the present invention, the modification method of the modified distearate dimethylammonium lithium montmorillonite is as follows: the distearate dimethylammonium lithium montmorillonite is dispersed with a dispersant and then activated with an activator through a high-speed shearing process.

[0019] Furthermore, the modified distearate lithium dimethylammonium montmorillonite contains 5-30% distearate lithium dimethylammonium montmorillonite; And / or, the dispersant is selected from at least one of polydimethylsiloxane, isododecane, and caprylic / capric triglyceride; And / after, the activator is selected from triethyl citrate or alcohol.

[0020] As some specific embodiments of the present invention, the average particle size of the silica is 3~20µm, the oil absorption is 30-400 mL / 100 g, and the silica is at least one of porous and non-porous silica.

[0021] As some specific embodiments of the present invention, the Spirulina bonata extract contains phycocyanin, whose absorption spectrum has a peak wavelength between 280 and 400 nm and whose emission spectrum has a peak wavelength between 640 nm and 700 nm.

[0022] In a second aspect, the present invention provides a method for preparing the camellia flower composition as described in any of the preceding claims, comprising the following steps: S1, A phase preparation: Weigh polydimethylsiloxane, physical sunscreen agent and water-in-oil emulsifier by mass percentage, mix and stir evenly to obtain phase A mixture; S2 and B phase preparation: Weigh C12-15 alcohol benzoate, trimethylsiloxysilicate, modified distearate dimethylammonium lithium montmorillonite, and silica according to the mass percentage and stir evenly to obtain the B phase mixture; S3, AB phase mixing: While stirring and homogenizing the B phase mixture, slowly add the A phase mixture, and stir evenly to obtain the oil phase composition; S4 and C phase preparation: Weigh out camellia extract, spirulina extract, glucosylrutin, p-hydroxyacetophenone, 1,2-hexanediol and water according to the mass percentage, heat and stir until completely dissolved to obtain the C phase mixture, which is the aqueous phase composition. S5. Oil-water-oil mixing: The oil phase composition obtained in step S3 is put into an emulsifying pot, and the aqueous phase composition obtained in step S4 is slowly added while stirring and homogenizing. After stirring evenly, the mixture is obtained.

[0023] As some specific embodiments of the present invention, in steps S3 and / or S5, the homogenization speed is 2000-4000 rpm, the homogenization time is at least 5 min, and the stirring speed is 20-50 rpm.

[0024] As some specific embodiments of the present invention, the heating temperature is 75-90°C.

[0025] Thirdly, the present invention provides the use of the camellia composition as described in any of the preceding claims in the preparation of skin care or sun protection products such as creams or lotions.

[0026] As some specific embodiments of the present invention, the waterproof and sweat-resistant camellia composition accounts for 0.5%-90.0% of the total weight of the oil-in-water type cream or lotion product.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) The camellia flower composition can promote fibroblast repair, has a repairing effect on the skin surface barrier, and has excellent anti-free radical ability. It can effectively inhibit melanin formation, lighten spots, and brighten skin tone. It can promote collagen synthesis, inhibit elastase activity, and has anti-wrinkle and firming effects on the skin. It has an inhibitory effect on hyaluronidase, inflammatory factors TNF-α and IL-6, and has a very good soothing effect.

[0028] (2) In the composition of the present invention, modified zinc oxide, modified titanium dioxide, and refreshing oils (low-viscosity polydimethylsiloxane, isododecane, or C12-15 benzoyl alcohol) are ground in a specified mass ratio, which can enhance their adhesion and make them easier to apply evenly. At the same time, the addition of a specific mass ratio of silica can improve the problem of sunscreens easily forming a thick protective layer on the skin surface, significantly reduce the greasiness of the product, and make it more skin-friendly, lightweight, and breathable during use. It can also improve the sun protection efficacy (SPF value, PFA value).

[0029] (3) Modified distearate lithium dimethylammonium montmorillonite can form a uniform and smooth film on the skin surface, giving the skin a soft and smooth feeling. This film not only helps to prevent moisture loss, but also protects the skin from external environmental damage. The oil droplets in the oil phase are covered by distearate lithium dimethylammonium montmorillonite, which reduces contact with the water phase, prevents re-emulsification, and makes sunscreen cosmetics effective in resisting water. It also has thickening and suspending effects, which helps to disperse powders (such as physical sunscreens such as titanium dioxide and zinc oxide) and improve the sun protection effect.

[0030] Trimethylsiloxane can form a waterproof film on the skin surface, effectively preventing moisture loss and maintaining skin's suppleness. At the same time, this ingredient also has excellent spreadability, increasing the smoothness of cosmetics, reducing skin dryness, and making sunscreen cosmetics easier to apply evenly.

[0031] The composition of this invention uses polydimethylsiloxane and C12-15 benzoyl alcohol as the external phase and water as the internal phase. Trimethylsiloxysilicate and lithium distearate dimethylammonium montmorillonite are used to increase the viscosity and continuity of the oil phase. These components, combined with specific surfactants such as glycerol-3 diisostearate, lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, PEG-10 polydimethylsiloxane, and physical sunscreens in a specific ratio, can form a breathable protective film on the skin surface, enhancing extensibility and water resistance, and contributing to a more uniform and denser interfacial film. A specific mass ratio allows the sunscreen to remain on the skin surface, preventing penetration into deeper layers. This composition forms a film quickly on the skin surface, is thin and non-greasy, has good breathability, and is water- and sweat-resistant. Upon contact with water and sweat, the film uniformity is improved compared to the control test. The sunscreen film becomes more stable after contact with water and sweat, and its density increases after exposure to heat and high temperatures. It can also form a hydrophobic film on the skin, which is not easily washed away by water or sweat, and has enhanced waterproof, sweatproof and friction-resistant effects. It is suitable for people whose skin is in water for a long time or in environments such as summer beaches, swimming pools, or exercise where they sweat.

[0032] (4) Spirulina bonata extract contains phycocyanin, whose absorption spectrum has peak wavelengths in the range of 280-400 nm and emission spectrum has peak wavelengths in the visible light bands of 640 nm and 700 nm. It can convert ultraviolet light into green, yellow, and red light with wavelengths in the range of 500 nm to 700 nm. Glucosylrutin has antioxidant and anti-glycation effects and can also counteract blue light in the visible light band of 400-500 nm. The camellia extract of this invention, combined with spirulina extract and glucosylrutin, and used in combination with water in a specific ratio, when compared with a blank sample, can enhance the inhibition of blue light wavelengths in the visible light band of 400-500 nm. Under excitation light of 280 nm to 500 nm, it can convert ultraviolet light into green, yellow, and red light with wavelengths in the range of 500 nm to 760 nm. Camellia extract, spirulina extract, and glucosylrutin have a synergistic effect in sun protection. When added to sunscreen products, it can synergistically enhance the absorption and conversion of ultraviolet light with zinc oxide, while also improving antioxidant capacity and soothing effects.

[0033] In summary, the camellia composition of this invention can quickly and evenly form a film on the skin surface, enhancing the absorbance of specific wavelengths and the sun protection efficacy (SPF value, PFA value) of the product, strengthening its waterproof and sweatproof effects. The sun protection film becomes more stable upon contact with water and sweat, and its density increases further upon exposure to heat and high temperatures. Furthermore, the camellia composition of this invention also alters the wavelength of ultraviolet light, converting harmful ultraviolet light into skin-beneficial light, which is then converted into cellular energy. It also promotes collagen production and has soothing and repairing effects. By combining the composition in a specific ratio, the sunscreen agent can remain on the skin surface, preventing its penetration into deeper layers. This composition is gentle and non-irritating. When added to skincare products, it significantly reduces the oiliness of the product, making the formula more skin-friendly and lightweight. Adding it to water-in-oil emulsions improves their sun protection efficacy, while adding it to oil-in-water emulsions enhances their water resistance and moisturizing properties. Attached Figure Description

[0034] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 The graph shows the peak values ​​of the fluorescence emission of each composition in Example 1 and Comparative Examples 1-6 at wavelengths of 280-320 nm. Figure 2 The graph shows the peak values ​​of the fluorescence emission of each composition in Example 1 and Comparative Examples 1-6 at a wavelength of 320-400 nm. Figure 3 The graph shows the peak values ​​of the fluorescence emission of each composition in Example 1 and Comparative Examples 1-6 at a wavelength of 400-500 nm. Figure 4 The above are peak curves of the absorption spectra of the compositions in Example 1 and Comparative Examples 1-6 in the wavelength range of 230~500 nm. Figure 5 The graph shows the peak values ​​of the fluorescence emission of each composition in Comparative Example 7 and Examples 2-4 at wavelengths of 280-320 nm. Figure 6 The graph shows the peak values ​​of the fluorescence emission of each composition in Comparative Example 7 and Examples 2-4 at a wavelength of 400-500 nm. Figure 7 The peak curves are the absorption spectra of the compositions in Comparative Example 7 and Examples 2-4 in the wavelength range of 230~500 nm. Figure 8 The images shown in Example 4 depict the film formation morphology of Group 1 and Group 2 applied to a glass slide. The left image shows the film formation morphology of Group 1 on the glass slide, and the right image shows the film formation morphology of Group 2 on the glass slide. Figure 9 The images shown in Example 4 are morphological images of Group 1 and Group 2 observed under a 400x microscope. The left image is the morphological image of Group 1 observed under a 400x microscope, and the right image is the morphological image of Group 2 observed under a 400x microscope. Detailed Implementation

[0035] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0036] Example 1 This embodiment provides a camellia composition with waterproof and sweat-resistant properties and photothermal synergistic effects. The dosage of each component is shown in Table 1, and the preparation method is as follows: 1. Preparation of Phase A: Weigh components 1, 2, 3, 4, 5, and 6 according to their mass percentages, mix and stir evenly, and grind them using a grinder to obtain the Phase A mixture. 2. Preparation of phase B: Weigh components 7, 8, 9, and 10 according to their mass percentages, mix and stir evenly to obtain a phase B mixture. 3. Preparation of oil phase: Mix and stir phase A and phase B evenly to obtain oil phase mixture; 4. Preparation of C phase (aqueous phase): Weigh components 11, 12, 13, 14, 15, and 16 by mass percentage, mix and stir evenly, heat to 90℃ to dissolve into a completely transparent and homogeneous liquid, and obtain the C phase material mixture. 5. Oil-water phase mixing: The oil phase composition is put into an emulsification pot, and the water phase mixture is slowly added while stirring and homogenizing. The mixture is stirred evenly to obtain the final composition. The homogenization speed is 3000 rpm, the homogenization time is at least 5 minutes, and the stirring speed is 40 rpm.

[0037] The composition of Example 1 exhibits absorption spectral activity in the wavelength range of approximately 230-500 nm. Figure 4 It can significantly alter the wavelength of ultraviolet light and convert harmful ultraviolet light into red light that is beneficial to the skin. Figure 1-3 Meanwhile, its effects are significantly enhanced in the following ways: it forms a film quickly and evenly on the skin surface, significantly improving the sun protection efficacy (SPF value, PFA value); the specific ratio of this composition can effectively keep the sunscreen agent on the skin surface, preventing its penetration into the deeper layers of the skin; the composition is gentle and non-irritating, and when added to skincare products, it can significantly improve the oiliness of the product, making the formula more skin-friendly and lightweight. Furthermore, its light absorption is stronger when exposed to water and heat (Tables 3 and 4).

[0038] Example 2 This embodiment provides a camellia flower composition. The amount of each component is shown in Table 4. The preparation method is to mix and stir D and E evenly.

[0039] The composition of Example 2 can form a film quickly and evenly on the skin surface, significantly improving the sun protection efficacy (SPF value, PFA value); it can also significantly change the wavelength of ultraviolet rays and convert harmful ultraviolet light into red light that is beneficial to the skin. Figure 5 , 6 This composition can enhance the absorbance of a specific wavelength in a product; at the same time, through a specific ratio, it is gentle and non-irritating. When added to skincare products, it can significantly improve the oiliness of the product, making the formula more skin-friendly and lightweight. Furthermore, its absorbance is stronger when exposed to water and heat (Tables 3 and 4).

[0040] Example 3 This embodiment provides a camellia flower composition, the amounts of each component are shown in Table 4, and the preparation method is the same as in Example 2.

[0041] The composition of Example 3 can form a film quickly and evenly on the skin surface, significantly improving the sun protection efficacy (SPF value, PFA value); significantly enhancing waterproof, sweatproof, and friction-resistant effects; and also significantly altering the wavelength of ultraviolet rays, converting harmful ultraviolet light into beneficial red light for the skin. Figure 5 , 6 This composition can enhance the absorbance of a specific wavelength in a product; at the same time, through a specific ratio, it is gentle and non-irritating. When added to skincare products, it can significantly improve the oiliness of the product, making the formula more skin-friendly and lightweight. Furthermore, its absorbance is stronger when exposed to water and heat (Tables 3 and 4).

[0042] Example 4 This embodiment provides a camellia composition with waterproof and sweat-resistant properties and photothermal synergistic effects. The dosage of each component is shown in Table 4, and the preparation method is the same as in Example 2.

[0043] The composition of Example 4 can form a film quickly and evenly on the skin surface, significantly improving the sun protection efficacy (SPF value, PFA value); significantly enhancing waterproof, sweatproof, and friction-resistant effects; and also significantly altering the wavelength of ultraviolet rays, converting harmful ultraviolet light into beneficial red light for the skin. Figure 5 , 6 This composition can enhance the absorbance of a specific wavelength in a product. Furthermore, through a specific ratio, this composition is gentle and non-irritating. When added to skincare products, it can significantly reduce the oiliness of the product, making the formula more skin-friendly and lightweight. The absorbance also shows stronger absorption upon contact with water and heat (Tables 3 and 4).

[0044] Comparative Example 1 This comparative example provides a camellia flower composition. The amounts of each component are shown in Table 1. The preparation method is as follows: weigh components 12, 13, and 14 according to the mass percentage, mix and stir evenly, and heat to 90°C to obtain a mixed material composition.

[0045] The composition of Comparative Example 1 exhibits absorption spectral activity in the wavelength range of approximately 230-340 nm. Figure 4 However, it does not have the function of light conversion ( Figure 1-3 It does not exhibit the characteristic of becoming stronger when exposed to water or heat.

[0046] Comparative Example 2 This comparative example provides a camellia flower composition. The amounts of each component are shown in Table 1. The preparation method is as follows: weigh components 11, 12, 13, and 14 according to their mass percentages, mix and stir evenly, and heat to 90°C to obtain a mixed material composition.

[0047] The composition of Comparative Example 2 exhibits absorption spectral activity in the wavelength range of approximately 230-340 nm. Figure 4 However, it does not have the function of light conversion ( Figure 1-3 ).

[0048] Comparative Example 3 This comparative example provides a camellia flower composition. The amounts of each component are shown in Table 1. The preparation method is as follows: Take components 12, 13, 14, and 15 by mass percentage, mix and stir evenly, and heat to 90°C to obtain a mixed material composition.

[0049] The composition of Comparative Example 3 exhibits absorption spectral activity in the wavelength range of approximately 230-340 nm. Figure 4 However, it does not have the function of light conversion ( Figure 1-3 ).

[0050] Comparative Example 4 This comparative example provides a camellia flower composition. The amounts of each component are shown in Table 1. The preparation method is as follows: weigh components 12, 13, 14, and 16 according to their mass percentages, mix and stir evenly, and heat to 90°C to obtain a mixed material composition.

[0051] The composition of Comparative Example 4 exhibits absorption spectral activity in the wavelength range of approximately 200-420 nm. Figure 4 It does not have the function of light conversion and cannot convert harmful light into beneficial light. Figure 1-3 ).

[0052] Comparative Example 5 This comparative example provides a camellia flower composition. The amounts of each component are shown in Table 1. The preparation method is as follows: Take components 11, 12, 13, 14, 15, and 16 by mass percentage, mix and stir evenly, and heat to 90°C to obtain a mixed material composition.

[0053] The composition of Comparative Example 5 exhibits absorption spectral activity in the wavelength range of approximately 200-420 nm. Figure 4 It does not have the function of light conversion and cannot convert harmful light into beneficial light. Figure 1-3 ).

[0054] Comparative Example 6 This comparative example provides a camellia flower composition, the amounts of each component are shown in Table 1, and the preparation method is as follows: 1. Preparation of oil phase: Weigh components 1, 2, 3, 6, 7, 8, 9, and 10 according to their mass percentages, mix and stir evenly to obtain phase A mixture, which is the oil phase; 2. Preparation of aqueous phase: Weigh components 12, 13, and 14 according to their mass percentages, mix and stir evenly, heat to 90℃ to dissolve into a completely transparent and homogeneous liquid, and obtain the C-phase material mixture, which is the aqueous phase; 3. Oil-water phase mixing: Add the oil phase composition to the emulsification pot, and slowly add the water phase mixture while stirring and homogenizing. Stir until uniform and finally obtain the composition. The homogenization speed is 3000 rpm, the homogenization time is at least 5 minutes, and the stirring speed is 40 rpm.

[0055] The composition of Comparative Example 6 exhibits absorption spectral activity in the wavelength range of approximately 230-500 nm. Figure 4 It does not have the function of light conversion and cannot convert harmful light into beneficial light. Figure 1-3 The absorbance is stronger when exposed to water and heat (Tables 3 and 4).

[0056] Comparative Example 7 The amounts of components used in this comparative example are shown in Table 2.

[0057] The component in Comparative Example 7 had no effect on photoconversion or photoabsorption. Figure 5-7 ).

[0058] The formulations of Example 1 and Comparative Examples 1-6 are shown in Table 1 below: Table 1 Formulations of Example 1 and Comparative Examples 1-6

[0059] In Table 1 above, the formula for camellia extract is: 62.5% water, 27.5% 1,3-propanediol, 5% camellia flower extract, and 5% camellia leaf extract.

[0060] The preparation methods for camellia flower and camellia leaf extracts are as follows: (1) The red camellia leaf powder and red camellia flower powder were subjected to supercritical CO2 extraction (15MPa, 40℃). After extraction, the red camellia flower powder and red camellia leaf powder were taken out. (2) 30% ethanol solution was added to the red camellia flower leaf powder obtained in step S1 and ultrasonic treatment was performed at 38℃. (3) Cellulase with a mass of 1% of the red camellia flower leaf powder was added to the ultrasonic treatment solution at 60℃ for extraction. After cooling to room temperature, the solution was filtered to obtain the crude extract of red camellia flower and the crude extract of red camellia leaf. S4. The filtrate obtained in step S3 was filtered by ultrafiltration membrane and then purified by adsorption of macroporous resin. The molecular weight cutoff was 1500, and the red camellia flower extract and red camellia leaf extract were obtained.

[0061] The formulations of Examples 2-4 and Comparative Example 7 are shown in Table 2 below: Table 2 Formulations of Examples 2-4 and Comparative Example 7

[0062] The SPF and PFA values ​​of the above-mentioned examples and comparative examples were tested according to the determination methods of sunscreen cosmetics' sun protection factor (SPF value) and long-wave ultraviolet protection factor (PFA value) in the "Cosmetic Safety Technical Specifications" (2015 edition). The test results are shown in Tables 1 and 2 above.

[0063] The SPF values ​​in Tables 1 and 2 indicate that camellia extract, spirulina extract, and glucosylrutin have a synergistic promoting effect on sun protection. Furthermore, in the comparative experiments of Comparative Example 7 and Examples 2-3, the SPF and PFA values ​​increased accordingly with the increase in the amount of the composition in Example 1, indicating that the sun protection efficacy relatively increases with the amount of the composition in Example 1 added.

[0064] Example 1 1. Fluorescence emission experiments were conducted on the compositions of Example 1 and Comparative Examples 1-6 at different wavelengths, and the results are as follows: Figure 1-3 As shown.

[0065] Figure 1 The graphs show the peak values ​​of the fluorescence emission results of the compositions in Example 1 and Comparative Examples 1-6 at the corresponding wavelengths of 280-320 nm. Figure 1 The results showed that: Example 1 could convert harmful light of 300nm in the UVB wavelength range into beneficial light of about 560nm, while the compositions of Comparative Examples 1-5 had no light conversion effect, and Comparative Example 6 could not convert harmful light in the UVB range into beneficial light.

[0066] Figure 2The graph shows the peak values ​​of the fluorescence emission of each composition in Example 1 and Comparative Examples 1-6 at a wavelength of 320-400 nm. Figure 2 The results show that Example 1 can convert harmful light at 330nm in the UVA wavelength range into beneficial light at around 560nm, while Comparative Examples 1-5 have no light conversion effect, and Comparative Example 6 cannot convert harmful light in the UVA range into beneficial light.

[0067] Figure 3 The graph shows the peak values ​​of the fluorescence emission results of each composition in Example 1 and Comparative Examples 1-6 at a wavelength of 400-500 nm. Figure 3 The results show that Example 1 can convert harmful light at 430nm in the blue light wavelength range into beneficial light at around 530nm, while Comparative Examples 1-6 have no light conversion effect.

[0068] The above results indicate that the composition of Example 1 possesses excellent photoconversion properties, capable of converting harmful light into beneficial light. The synergistic use of camellia extract, spirulina extract, and glucosylrutin, combined with a physical sunscreen, results in the composition of Example 1 exhibiting excellent photoconversion properties. While Comparative Example 5 also contains camellia extract, spirulina extract, and glucosylrutin, it lacks photoconversion properties because it does not incorporate the physical sunscreens zinc oxide and titanium dioxide.

[0069] 2. Absorption spectroscopy experiments were conducted on the compositions of Example 1 and Comparative Examples 1-6 in the wavelength range of 230-500 nm. The results are as follows: Figure 4 As shown.

[0070] Figure 4 The peak curves are the absorption spectral results of the compositions in Example 1 and Comparative Examples 1-6 in the wavelength range of 230-500 nm. Figure 4 The results show that comparative examples 1-3 have absorption spectra in the wavelength range of approximately 230-340 nm, comparative examples 4-5 have absorption spectra in the wavelength range of 200-420 nm, and comparative examples 6 and example 1 both have absorption spectra in the wavelength range of 230-500 nm.

[0071] 3. Fluorescence emission experiments were conducted on the compositions of Examples 2-4 and Comparative Example 7 at different wavelengths, and the results are as follows: Figure 5-7 As shown.

[0072] Figure 5 The graph shows the peak values ​​of the fluorescence emission results of each composition in Comparative Example 7 and Examples 2-4 at wavelengths of 280-320 nm. Figure 5The results show that Examples 2, 3, and 4 can convert harmful light of 300nm in the UVB wavelength range into beneficial light of about 560nm, and Example 4 has a better light conversion effect.

[0073] Figure 6 The graph shows the peak values ​​of the fluorescence emission results of each composition in Comparative Example 7 and Examples 2-4 at a wavelength of 400-500 nm. Figure 6 The results show that Examples 2, 3, and 4 can convert harmful light at 430nm in the blue light wavelength range into beneficial light at around 530nm, and the light conversion effect is greater in Example 4 than in Example 3, which is greater than in Example 2. Comparative Example 7 has no light conversion effect.

[0074] 4. Absorption spectroscopy experiments were conducted on the compositions of Examples 2-4 and Comparative Example 7 in the wavelength range of 230-500 nm. The results are as follows: Figure 7 As shown.

[0075] Figure 7 The peak curves are the absorption spectral results of the compositions in Comparative Example 7 and Examples 2-4 in the wavelength range of 230-500 nm. Figure 7 The results show that Examples 2, 3, and 4 all exhibit absorption spectra in the wavelength range of 230-500 nm.

[0076] Example 2 1. The components of Examples 1-4 and Comparative Examples 6 and 7 were immersed in water at room temperature for 30 minutes, and the changes in absorbance values ​​were measured. The results are shown in Table 3 below: Table 3. Changes in absorbance when immersed in water at room temperature.

[0077] A change rate of absorbance greater than 100 indicates an effect, and a change rate greater than 110 indicates a significant effect.

[0078] Based on Comparative Example 7, the absorbance of the compositions in Examples 1-4 and Comparative Example 6 all showed stronger performance upon contact with water. Example 1 showed the most significant effect.

[0079] 2. The components of Examples 1-4 and Comparative Examples 6 and 7 were heated in an oven at 45°C for 30 minutes, and the changes in absorbance values ​​were measured. The results are shown in Table 4 below: Table 4. Changes in absorbance after heating

[0080] Based on Comparative Example 7, the absorbance of the compositions in Examples 1-4 and Comparative Example 6 all showed stronger performance upon heating. Example 1 showed the most significant effect. This demonstrates that the camellia composition of the present invention has good waterproof and heat-resistant effects and photothermal synergistic effects; the sunscreen film formed after contact with water and heat is more stable and has stronger density.

[0081] Example 3: Skin Irritation Safety Test Skin irritation safety tests were conducted on the compositions of each embodiment and comparative example, and the experimental methods are shown below: Referencing the human skin patch test in the "2015 Cosmetic Safety Technical Specifications," the method for the occlusive skin patch test is as follows: Select 30 individuals aged 18-60 years, and use patches with an area not exceeding 50 mm². 2 A qualified patch test apparatus with a depth of approximately 1 mm was used. 0.020 mL of the composition from the above examples and comparative examples was placed inside the patch test apparatus chamber. The control well was a blank control (without any substance). The patch test apparatus containing the composition was applied to the flexor side of the subject's forearm using hypoallergenic adhesive tape. Gently press with the palm of the hand to ensure even application to the skin, and leave for 24 hours. Skin reactions were observed according to the standards in Table 5 at 30 minutes (after the indentation disappeared), 24 hours, and 48 hours after removing the patch test apparatus containing the composition, and the results were recorded. The patch test results of the composition are shown in Table 6.

[0082] Table 5. Grading Criteria for Skin Reactions in Occlusive Patch Tests

[0083] Table 6 Human safety test results

[0084] Experimental results show that the compositions of the above embodiments and comparative examples, as well as their application in sunscreen products, all passed the human patch safety test.

[0085] Example 4 – Film-forming property test The following two control experiments were set up: Group 1 consists of the following components in parts by weight as the external phase: 25 parts polydimethylsiloxane, 5 parts C12-15 benzoyl alcohol, 1.5 parts polyglycerol-3 diisostearate, 3 parts lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, 2 parts PEG-10 polydimethylsiloxane, 20 parts modified titanium dioxide, 15 parts modified zinc oxide, 7.8 parts water, 5 parts camellia extract, 0.5 parts p-hydroxyacetophenone, 0.5 parts 1,2-hexanediol, 0.1 parts spirulina extract, and 0.1 parts glucosylrutin. The internal phase is water.

[0086] Group 2 contains the following components in parts by weight: 25 parts polydimethylsiloxane, 5 parts C12-15 benzoyl alcohol, 1.5 parts polyglycerol-3 diisostearate, 3 parts lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, 2 parts PEG-10 polydimethylsiloxane, 20 parts modified titanium dioxide, 15 parts modified zinc oxide, trimethylsiloxysilicate, 10 parts modified distearate dimethylammonium lithium montmorillonite, 7.8 parts water, 5 parts camellia extract, 0.5 parts p-hydroxyacetophenone, 0.5 parts 1,2-hexanediol, 0.1 parts spirulina extract, and 0.1 parts glucosylrutin.

[0087] The compositions from both experiments were applied to a glass slide, such as... Figure 8 As shown, the left image shows the morphology of Group 1 applied to the glass slide, and the right image shows the morphology of Group 2 applied to the glass slide. According to... Figure 8 It can be seen that the film-forming properties of Group 2 are significantly better than those of Group 1.

[0088] Observe the slide under a microscope, such as Figure 9 As shown, the left image is a morphological image of group one under a 400x microscope, and the right image is a morphological image of group two under a 400x microscope. According to... Figure 9 It can be seen that Figure 2 The interface film formed in this process is more uniform and denser.

[0089] The above experimental results show that adding trimethylsiloxysilicate, distearate, and lithium dimethylammonium montmorillonite to the water-in-oil emulsion in the external phase at a specific mass ratio helps to form a more uniform and compact interfacial film.

[0090] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A camellia flower composition with waterproof, sweat-resistant, and photothermal synergistic effects, characterized in that, The components include the following mass percentages: Camellia extract 0.1~10.0%, Polydimethylsiloxane 1.0~50.0%, Physical sunscreens 1-50.0%, C12-15 alcohol benzoate 0.5~10.0%, Water-in-oil emulsifier 0.5~10.0%, Trimethylsilyloxysilicate 0.1~5.0%, Modified distearate, lithium dimethylammonium montmorillonite, 0.5~12.0%, Silica 0.1~10.0%, Spirulina bonata extract 0.001~1.0%, Glucosylrutin 0.001~1.0%, p-Hydroxyacetophenone 0.1~1.0%, 1,2-Hexanediol 0.1~1.0%, Water TO 100%.

2. The camellia composition according to claim 1, characterized in that, The camellia extract contains water, 1,3-propanediol, camellia flower extract, and camellia leaf extract, in a mass ratio of 50-70:20-30:1-10:1-10.

3. The camellia composition according to claim 1, characterized in that, The viscosity of the polydimethylsiloxane at 25°C is 1.5~6 mm. 2 / s.

4. The camellia composition according to claim 1, characterized in that, The physical sunscreen agent is selected from at least one of modified titanium dioxide and modified zinc oxide; the modified titanium dioxide is obtained by hydrophobic treatment of titanium dioxide, and the modified zinc oxide is obtained by hydrophobic treatment of zinc oxide; The average particle size of the titanium dioxide and / or zinc oxide is 10 nm to 200 nm. The surface treatment agent for hydrophobic treatment of the titanium dioxide and / or zinc oxide is selected from one or more of aluminum hydroxide, aluminum oxide, stearic acid, aluminum stearate, hydrogenated polydimethylsiloxane, triethoxyoctylsilane, and polydimethylsiloxane.

5. The camellia composition according to claim 1, characterized in that, The water-in-oil emulsifier is selected from at least one of polyglycerol-3 diisostearate, lauryl PEG-9 polydimethylsiloxane-ethyl polydimethylsiloxane, and PEG-10 polydimethylsiloxane, and the HLB value of the water-in-oil emulsifier is 3 to 8.

6. The camellia composition according to claim 1, characterized in that, The modification method of the modified distearate lithium dimethylammonium montmorillonite is as follows: the distearate lithium dimethylammonium montmorillonite is dispersed with a dispersant and then activated with an activator through a high-speed shearing process. The modified distearate lithium dimethylammonium montmorillonite contains 5-30% distearate lithium dimethylammonium montmorillonite. The dispersant is selected from at least one of polydimethylsiloxane, isododecane, and caprylic / capric triglyceride; The activator is selected from triethyl citrate or alcohol.

7. The camellia composition according to claim 1, characterized in that, The silica has an average particle size of 3-20µm and an oil absorption capacity of 30-400 mL / 100 g. The silica is at least one of porous and non-porous silica.

8. The camellia composition according to claim 1, characterized in that, The Spirulina bonata extract contains phycocyanin, whose absorption spectrum has a peak wavelength between 280 and 400 nm, and whose emission spectrum has a peak wavelength between 640 nm and 700 nm.

9. A method for preparing a camellia composition as described in any one of claims 1-8, characterized in that, Includes the following steps: S1, A phase preparation: Weigh polydimethylsiloxane, physical sunscreen agent and water-in-oil emulsifier by mass percentage, mix and stir evenly to obtain phase A mixture; S2 and B phase preparation: Weigh C12-15 alcohol benzoate, trimethylsiloxysilicate, modified distearate dimethylammonium lithium montmorillonite, and silica according to the mass percentage and stir evenly to obtain the B phase mixture; S3, AB phase mixing: While stirring and homogenizing the B phase mixture, slowly add the A phase mixture, and stir evenly to obtain the oil phase composition; S4 and C phase preparation: Weigh out camellia extract, spirulina extract, glucosylrutin, p-hydroxyacetophenone, 1,2-hexanediol and water according to the mass percentage, heat and stir until completely dissolved to obtain the C phase mixture, which is the aqueous phase composition. S5. Oil-water-oil mixing: The oil phase composition obtained in step S3 is put into an emulsifying pot, and the aqueous phase composition obtained in step S4 is slowly added while stirring and homogenizing. After stirring evenly, the mixture is obtained.

10. The use of a camellia composition as described in any one of claims 1-8 in the preparation of a skin care or sun protection product such as a cream or lotion.

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