Sunscreen synergistic composition and application thereof

Abstract

The invention relates to the technical field of cosmetics, and particularly discloses a sunscreen synergistic composition and application thereof, and the sunscreen synergistic composition comprises the following components: sugarcane extract, cyperus esculentus root oil, and Brazil palm wax (and) rice chaff wax. The sunscreen synergistic effect of the sunscreen synergistic composition is utilized, a chemical sunscreen agent with potential safety hazards can be partially replaced, the potential safety hazard coefficient is reduced due to the fact that all the sunscreen components are safe or the needed adding amount is low, and a sunscreen product which is high in sunscreen coefficient, mild in formula, low in potential safety hazards and even environmentally friendly is obtained.

Description

Technical Field

[0001] The present application relates to the field of cosmetic technology, and in particular to a sunscreen synergistic composition and its application. Background Art

[0002] Ultraviolet radiation is a major environmental factor contributing to premature skin aging, hyperpigmentation, and even skin cancer. The damage it causes to the skin can be both immediate and cumulative. Even just 15-30 minutes of unprotected sun exposure at midday in summer is enough to trigger a pronounced sunburn, characterized by redness, burning, pain, and, in severe cases, even blisters and peeling. Long-wave ultraviolet rays can penetrate deep into the dermis, generating reactive oxygen species (ROS), which progressively damage collagen and elastic fibers, activate tyrosinase, and stimulate melanocytes to overproduce melanin. This not only causes uneven skin tone and worsens dark spots, but can also lead to persistent chloasma and age spots.

[0003] UV rays cause more than just superficial damage to the skin. Molecular biological research has confirmed that UV radiation can induce DNA mutations in skin cells and inhibit the function of tumor suppressor genes, significantly increasing the risk of skin malignancies such as basal cell carcinoma, squamous cell carcinoma, and melanoma. Statistics from the American Academy of Dermatology indicate that approximately 90% of non-melanoma skin cancers and 86% of melanoma cases are linked to UV exposure. Furthermore, UV rays weaken the skin's barrier function, disrupting the integrity of the stratum corneum, leading to increased transepidermal water loss, dryness, and sensitivity, and even exacerbating existing chronic skin conditions such as rosacea and atopic dermatitis.

[0004] Faced with the multiple threats of ultraviolet radiation, the scientific use of sunscreen products has become the most critical component of modern skin protection systems. Sunscreen products form an effective protective barrier on the skin's surface through physical reflection or chemical absorption mechanisms. Dermatologists generally recommend choosing a broad-spectrum sunscreen with an SPF of 30 or higher and a PA+++ rating for comprehensive UV protection. However, the effectiveness of sunscreen products is closely related to the amount used. The average consumer only applies 25-50% of the standard amount, reducing the actual protection to 1 / 3-1 / 2 of the labeled value. Therefore, sunscreen products with a high SPF (SPF50) provide a safety margin for insufficient use, ensuring that the effective SPF remains between 15 and 25. However, the requirement for a high SPF also means an increase in the amount of sunscreen used.

[0005] While sunscreen products offer numerous benefits, their ingredients can also pose potential concerns. Chemical sunscreens such as oxybenzone and octinoxate have been controversial due to their potential hormone-disrupting effects. Experimental studies have shown that these substances may mimic the effects of estrogen and interfere with the normal function of the endocrine system. Some consumers experience skin irritation, burning, or itching after using sunscreen products, which are often related to certain chemical sunscreens or auxiliary ingredients in the formula. Products containing avobenzone or octocrylene may induce contact dermatitis, particularly for those with sensitive skin. While physical sunscreens are relatively safe, they also have limitations in terms of user experience. Traditional zinc oxide and titanium dioxide formulas often leave a noticeable white residue on the skin, which can be unsightly, especially for those with darker skin tones. While the application of nanotechnology has improved this issue, the skin penetration of nanoparticles remains a matter of scientific debate. In addition, the molecular structure characteristics of some sunscreens may cause pores to be clogged and increase the risk of acne, which requires special attention for oily and acne-prone skin.

[0006] The environmental impact of sunscreen products cannot be ignored. Oceanographic studies show that approximately 4,000-6,000 tons of sunscreen are released into coral reef areas each year. Ingredients such as oxybenzone can cause coral bleaching and DNA damage, ultimately leading to the collapse of coral reef ecosystems. This discovery has prompted regions such as Hawaii and Palau to enact legislation banning the sale of sunscreen products containing certain harmful ingredients. To achieve high SPF values ​​and effective sun protection, large amounts of sunscreen are often added to sunscreen products to meet this demand.

[0007] The above negative effects brought about by sunscreens have to attract people's attention. Therefore, there is an urgent need for a sunscreen synergistic composition that can synergistically enhance the sunscreen effect. Summary of the Invention

[0008] The present application aims to overcome the shortcomings of the aforementioned prior art by providing a synergistic sunscreen composition and its use. By utilizing the synergistic sunscreen effect of the present application, it can partially replace chemical sunscreens that pose safety risks. The safety of each sunscreen component or the required lower dosage reduces the safety risk factor, resulting in a sunscreen product with a high SPF, a mild formula, low safety risks, and even environmental friendliness.

[0009] To achieve the above objectives, the technical solutions adopted in this application are:

[0010] The present application provides a sunscreen synergistic composition, which comprises the following components:

[0011] Sugarcane Extract, Cyperus oleifera Root Oil, Carnauba Wax (and) Oryza Sativa (Rice) Bran Wax.

[0012] After extensive research and testing, the present invention has found that the use of sugarcane extract, sedge root oil, carnauba wax (and) rice bran wax to form a sunscreen synergistic composition can synergistically improve the sun protection factor (SPF), allowing sunscreen products to achieve a high SPF value, replace part of the sunscreen dosage, and reduce the negative effects of sunscreen.

[0013] As a preferred embodiment of the sunscreen synergistic composition described in the present application, the sunscreen synergistic composition comprises the following components in percentage by weight:

[0014] Sugarcane extract 1-3%, cyperus rotundus root oil 4-10%, carnauba wax (and) rice bran wax 1-3%.

[0015] The combination of components within the aforementioned weight percentage ranges employed in this application can synergistically improve the product's SPF and enhance the sunscreen's effectiveness. Furthermore, the sedge root oil, sugarcane extract, carnauba wax, and rice bran wax components employed in this application are safe, require low addition levels, and reduce potential safety hazards. These components can partially replace chemical sunscreens with potential safety hazards, resulting in a sunscreen product with a high SPF, a mild formula, low potential safety hazards, and even environmental friendliness.

[0016] As a preferred embodiment of the sunscreen synergistic composition described in the present application, the sunscreen synergistic composition comprises the following components in percentage by weight:

[0017] Sugarcane Extract 3%, Cyperus rotundus Root Oil 10%, Carnauba Wax (and) Rice Bran Wax 3%.

[0018] The present application preferably combines the components in the above-mentioned weight proportions, which can better synergistically improve the sun protection index of the product, have a better sun protection synergistic effect, and thus enhance the sun protection effect of the sunscreen product; and the components selected in the present application can partially replace chemical sunscreens containing safety hazards, so that the sunscreen product has the advantages of high sun protection factor, mild formula, and low safety hazards.

[0019] The present application also provides the use of the above-mentioned sunscreen synergistic composition in the preparation of sunscreen cosmetics.

[0020] As a preferred embodiment of the application described in this application, the sunscreen cosmetics include sunscreen lotion or sunscreen cream.

[0021] The present application also provides a sunscreen lotion, which includes the sunscreen synergistic composition.

[0022] As a preferred embodiment of the sunscreen lotion described in the present application, the sunscreen lotion further comprises the following components in percentage by weight:

[0023] 5-20% sunscreen, 1-15% emollient, 1.5-5% emulsifier, 3-10% moisturizer, 0.1-1% thickener, 0.01-1% pH neutralizer, 0.01-0.1% chelating agent and 0.5-1.5% preservative, and the balance is water.

[0024] More preferably, the sunscreen lotion further comprises the following components in percentage by weight:

[0025] 9.5% sunscreen, 3% emollient, 2.5% emulsifier, 6% humectant, 0.2% thickener, 0.2% pH neutralizer, 0.05% chelating agent and 0.6% preservative, the balance being water.

[0026] As a preferred embodiment of the sunscreen lotion described in the present application, the sunscreen agent includes at least one of ethylhexyl methoxycinnamate (Uvinul MC 80), diethylamino hydroxybenzoyl hexyl benzoate (Uvinul APlus), ethylhexyl triazone (Uvinul T150) and bis-ethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S);

[0027] The emollient comprises at least one of butyloctanol salicylate, dicaprylyl carbonate, dibutyl adipate, coconut oil caprylate / caprate, isononyl isononanoate, propylheptyl caprylate, cocoglycerides, triethylhexanoin, caprylic / capric triglyceride, isopentyl laurate, C12-15 alcohol benzoate, squalane, olive oil, camellia seed oil, sea buckthorn oil, jojoba seed oil, bridge fruit oil, and silicone oil;

[0028] The emulsifier includes at least one of fatty acid esters, alkyl glycosides, sucrose fatty acid esters, polysorbates, and phosphates;

[0029] The moisturizing agent includes at least one of glycerin, butylene glycol, propylene glycol, glyceryl polyether-26, sodium hyaluronate, β-glucan, trehalose, glyceryl glucoside, and sodium PCA;

[0030] The thickener comprises at least one of acrylic acid cross-linked polymer, natural colloid, acrylic acid (ester) copolymer, and nonionic cellulose ether;

[0031] The pH neutralizer includes at least one of sodium hydroxide, triethanolamine, and arginine;

[0032] The chelating agent includes EDTA-2Na;

[0033] The preservative comprises at least one of phenoxyethanol / ethylhexylglycerin, sodium benzoate, and chlorphenesin.

[0034] Preferably, the emulsifier comprises glyceryl stearate (and) PEG-100 stearate (SP ARLACEL170MBAL-PA-(SG)) and / or arachidyl alcohol / behenyl alcohol / arachidyl glucoside (Montanov 202);

[0035] The thickening agent includes carbomer.

[0036] The present application also provides a method for preparing the above-mentioned sunscreen lotion, comprising the following steps:

[0037] S1. Mixing sedge root oil, sugarcane extract, emulsifier, sunscreen and emollient, and dissolving them completely at a temperature of 75° C. to 85° C. to form an oil phase;

[0038] S2. Mix water, moisturizer, thickener and chelating agent, dissolve them completely at 75°C to 85°C, add them to the oil phase and homogenize, cool to below 50°C, then add carnauba wax (and) rice bran wax, pH neutralizer and preservative, stir and mix evenly to obtain sunscreen lotion.

[0039] As a preferred embodiment of the method for preparing the sunscreen lotion described in the present application, in step S2, the homogenization time is 5 to 10 minutes, and the homogenization rate is 1500 to 10000 rpm, preferably 8000 rpm.

[0040] Compared with the prior art, this application has the following beneficial effects:

[0041] The present application provides a sunscreen synergistic composition and its application. The present application adopts sedge root oil, sugarcane extract, carnauba wax (and) rice bran wax to form a sunscreen synergistic composition, which can synergistically improve the sun protection factor (SPF) so that the sunscreen product can achieve a high SPF value. It can partially replace chemical sunscreens with safety hazards and reduce the negative effects of sunscreens. In addition, each sunscreen component has a lower safety hazard factor due to the safety of the components or the low required addition amount, so that a sunscreen product with a high sun protection factor, a mild formula, low safety hazards and even environmental friendliness can be obtained. DETAILED DESCRIPTION

[0042] In order to better illustrate the purpose, technical solutions and advantages of this application, this application will be further described below in conjunction with specific embodiments.

[0043] In the following examples and comparative examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified, and the components and raw materials used in each parallel experiment are all of the same kind.

[0044] The sources and types of raw materials involved in the following examples and comparative examples are shown in Table 1.

[0045] The sunscreen synergistic composition comprises the following components:

[0046] Cyperus oleifera root oil, sugar cane extract, carnauba wax (and) oryza sativa (Rice) bran wax.

[0047] Preferably, the sunscreen synergistic composition comprises the following components in percentage by weight:

[0048] Sugarcane extract 1-3%, cyperus rotundus root oil 4-10%, carnauba wax (and) rice bran wax 1-3%.

[0049] More preferably, the sunscreen synergistic composition comprises the following components in percentage by weight:

[0050] Sugarcane Extract 3%, Cyperus rotundus Root Oil 10%, Carnauba Wax (and) Rice Bran Wax 3%.

[0051] The present application adds the sunscreen synergistic composition to the sunscreen formula, and uses the in vitro SPF test method to detect and compare the SPF values ​​of the examples and comparative examples.

[0052] Table 1

[0053]

[0054] Examples 1 to 6

[0055] Examples 1 to 6 provide a sunscreen lotion and a preparation method thereof. The formula of the sunscreen lotion is shown in Table 2.

[0056] The preparation method of the sunscreen lotion comprises the following steps:

[0057] S1. Mixing sedge root oil, sugarcane extract, emulsifier, sunscreen and emollient, and dissolving them completely at a temperature of 75° C. to 85° C. to form an oil phase;

[0058] S2. Mix water, moisturizer, thickener and chelating agent, dissolve them completely at 75°C to 85°C, add them to the oil phase and homogenize, then add carnauba wax (and) rice bran wax, pH neutralizer and preservative, stir and mix evenly to obtain sunscreen lotion.

[0059] Table 2

[0060]

[0061]

[0062] Comparative Examples 1 to 10

[0063] Comparative Examples 1 to 10 provide a sunscreen lotion and a preparation method thereof, and the formula of the sunscreen lotion is shown in Table 3. The preparation method of the sunscreen lotion is similar to that of Examples 1 to 6.

[0064] Table 3

[0065]

[0066] Test Example 1: Determination of the sun protection effect of sunscreen lotion Determine the SPF values ​​of the sunscreen lotions prepared in Examples 1 to 6 and Comparative Examples 1 to 7 using the following method:

[0067] The SPF value of sunscreen lotions was tested using the in vitro sun protection factor (SPF) method in Cosemetics Europe-No. 26 Use of Alternative Methods to ISO 24444-2019. The results are shown in Table 4 below.

[0068] Table 4

[0069]

[0070]

[0071] The results show that the sunscreen lotions prepared in Examples 1 to 6 have relatively high SPF values ​​(66 to 75), and in particular, the sunscreen lotion provided in Example 6 has the best sun protection effect.

[0072] Compared with Examples 1 to 6, Comparative Examples 1 to 6 are those in which one or two of the cyperus rotundus root oil, sugarcane extract, carnauba wax (and) rice bran wax are removed, respectively. The SPF values ​​of the sunscreen lotions obtained are lower than those of Examples 1 to 6, indicating that the compounding of cyperus rotundus root oil, sugarcane extract, carnauba wax (and) rice bran wax can enable sunscreen products to achieve high SPF values, partially replace chemical sunscreens with potential safety hazards, and reduce the negative effects of sunscreens.

[0073] In Comparative Example 7, cyperus oleifera root oil, sugarcane extract, carnauba wax (and) rice bran wax were simultaneously removed, and the SPF value of the obtained sunscreen lotion was 38. The average SPF value of Experimental Examples 1 to 6 was 69, and the average SPF enhancement reached 81.6%, indicating that the sunscreen synergistic composition can significantly increase the SPF value. When the amount of sunscreen used remains unchanged, the addition of the sunscreen synergist can enable the product to achieve a high SPF protection effect.

[0074] The data from Examples 1-6 and Comparative Examples 1-7 were subjected to a t-test to analyze the significant differences. P = 0.001, p < 0.05, demonstrated significant differences between the two groups. This demonstrated that, while the type and ratio of sunscreen agents remained constant, the addition of the synergistic sunscreen composition significantly increased the sun protection factor (SPF), and that the combined use of the three components of the composition was more effective than when used individually or in combination.

[0075] Furthermore, the formulations made with the addition amounts in Comparative Examples 8-10 exhibit unsatisfactory skin feel and appearance. In Comparative Example 8, adding 5% sugarcane extract resulted in increased consistency and a harder texture, making it difficult to lift, squeeze out, or apply. In Comparative Example 9, adding 15% sedge root oil resulted in a greasy feel, unsuitable for sunscreen products. The high oil content also easily led to system instability. In Comparative Example 10, adding 5% carnauba wax and rice bran wax resulted in a noticeable yellowing and darkening of the appearance, and a rough feeling upon application.

[0076] Test Example 2: Safety Test

[0077] In order to verify the safety of the sunscreen synergistic composition, Example 6, in which the composition was added at the highest ratio, was selected for a human skin patch test.

[0078] Subjects: A total of 30 subjects, including 9 males and 21 females, aged 18 to 56 years, with an average age of 39.9±8.9 years, met the voluntary inclusion criteria.

[0079] Patch test method: Select qualified patch test equipment and use the closed patch test method. Place approximately 0.020g to 0.025g of the test substance in the patch test device and apply it to the subject's back with hypoallergenic tape. Remove the test substance after 24 hours and observe the skin reaction 0.5, 24, and 48 hours after removal. Record the results according to the skin reaction grading standards in the "Technical Specifications for Safety of Cosmetics" (2015 edition).

[0080] The test results are shown in Table 5.

[0081] Table 5

[0082]

[0083] The results of the human skin patch test showed that no adverse skin reactions occurred in any of the 30 subjects. The results of the human patch test in Example 6 demonstrate the skin friendliness and safety of the sunscreen synergistic composition.

[0084] The sunscreen components in the sunscreen synergistic composition of the present application have a lower safety risk factor due to the safety of the components or the low amount required to be added, so that a sunscreen product with a high sun protection factor, mild formula, low safety risk and even environmental friendliness can be obtained.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A sunscreen synergistic composition, characterized in that: The sunscreen synergistic composition comprises the following components: Sugarcane Extract, Cyperus oleifera Root Oil, Carnauba Wax (and) Oryza Sativa (Rice) Bran Wax.

2. The sunscreen synergistic composition according to claim 1, wherein The sunscreen synergistic composition comprises the following components in percentage by weight: Sugarcane extract 1-3%, cyperus rotundus root oil 4-10%, carnauba wax (and) rice bran wax 1-3%.

3. The sunscreen synergistic composition according to claim 2, characterized in that The sunscreen synergistic composition comprises the following components in percentage by weight: Sugarcane Extract 3%, Cyperus rotundus Root Oil 10%, Carnauba Wax (and) Rice Bran Wax 3%.

4. Use of the sunscreen synergistic composition according to any one of claims 1 to 3 in the preparation of sunscreen cosmetics.

5. The use according to claim 4, characterized in that The sunscreen cosmetics include sunscreen lotion or sunscreen cream.

6. A sunscreen lotion, characterized in that: The sunscreen lotion comprises the sunscreen synergistic composition according to any one of claims 1 to 3.

7. The sunscreen lotion according to claim 6, wherein The sunscreen lotion also includes the following components in percentage by weight: 5-20% sunscreen, 1-15% emollient, 1.5-5% emulsifier, 3-10% moisturizer, 0.1-1% thickener, 0.01-1% pH neutralizer, 0.01-0.1% chelating agent and 0.5-1.5% preservative, and the balance is water.

8. The sunscreen lotion according to claim 7, wherein The sunscreen comprises at least one of ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone and bis-ethylhexyloxyphenol methoxyphenyl triazine; The emollient comprises at least one of butyloctanol salicylate, dicaprylyl carbonate, dibutyl adipate, coconut oil caprylate / caprate, isononyl isononanoate, propylheptyl caprylate, cocoglycerides, triethylhexanoin, caprylic / capric triglyceride, isopentyl laurate, C12-15 alcohol benzoate, squalane, olive oil, camellia seed oil, sea buckthorn oil, jojoba seed oil, bridge fruit oil, and silicone oil; The emulsifier includes at least one of fatty acid esters, alkyl glycosides, sucrose fatty acid esters, polysorbates, and phosphates; The moisturizing agent includes at least one of glycerin, butylene glycol, propylene glycol, glyceryl polyether-26, sodium hyaluronate, β-glucan, trehalose, glyceryl glucoside, and sodium PCA; The thickener comprises at least one of acrylic acid cross-linked polymer, natural colloid, acrylic acid (ester) copolymer, and nonionic cellulose ether; The pH neutralizer includes at least one of sodium hydroxide, triethanolamine, and arginine; The chelating agent includes EDTA-2Na; The preservative comprises at least one of phenoxyethanol / ethylhexylglycerin, sodium benzoate, and chlorphenesin.

9. The method for preparing the sunscreen lotion according to claim 7, wherein: The following steps are involved: S1. Mixing sedge root oil, sugarcane extract, emulsifier, sunscreen and emollient, and dissolving them completely at a temperature of 75° C. to 85° C. to form an oil phase; S2. Mix water, moisturizer, thickener and chelating agent, dissolve them completely at 75°C to 85°C, add them to the oil phase and homogenize, cool to below 50°C, then add carnauba wax (and) rice bran wax, pH neutralizer and preservative, stir and mix evenly to obtain sunscreen lotion.

10. The method for preparing the sunscreen lotion according to claim 9, wherein: In step S2, the homogenization time is 5 to 10 minutes, and the homogenization speed is 1500 to 10000 rpm.

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