Infant face cream capable of reducing skin injury caused by light and heat and preparation method of infant face cream

Abstract

The invention discloses infant face cream capable of reducing skin injury caused by light and heat and a preparation method of the infant face cream, and the infant face cream comprises the following components in percentage by mass: 0.2%-1% of sodium polyacrylate, 0.05%-0.5% of carbomer, 0.5%-8% of erythritol, 0.3%-8% of camellia oil, 0.4%-0.6% of p-hydroxyacetophenone and 0.4%-0.6% of 1, 2-hexanediol. The preparation method comprises the following steps: adding the sodium polyacrylate, the carbomer, the erythritol, the p-hydroxyacetophenone and the 1, 2-hexanediol into water to be dispersed, heating, stirring and dissolving uniformly, after uniform gel is formed, adding the camellia oil according to a corresponding mass ratio, homogenizing uniformly, cooling and stirring, and neutralizing the pH value to obtain a finished product. The infant face cream prepared from the sodium polyacrylate, the carbomer, the erythritol and the camellia oil can reduce damage of light and heat to skin, multiple effects of one raw material are achieved, the formula is simplified, the safety of the formula is improved, and the efficacy of the product is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to an infant face cream that reduces the damage of photothermal to the skin and its preparation method. Background Technology

[0002] Sunlight includes ultraviolet (UV) radiation, infrared radiation, and visible light. In summer, as sunlight intensity increases, its effects on human skin also increase. UVA rays cause tanning and stimulate the production of reactive oxygen species, leading to skin damage. UVB rays cause sunburn and damage to cellular DNA and proteins. Infrared radiation has a thermal effect on the skin, affecting the extracellular matrix and negatively impacting elastin, collagen, and fibronectin, resulting in skin damage and inflammation.

[0003] Therefore, in addition to sun protection, it is also necessary to soothe and repair skin damage caused by light and heat in summer. This measure is even more necessary for infants and young children whose skin functions are not fully developed.

[0004] Infants' skin is thinner than adults', their body temperature regulation is poor, and their skin is easily sensitive to irritation, which can lead to dermatitis and eczema. Specialized summer face creams are needed to soothe and repair skin damage caused by light and heat in order to achieve healthy skin. The methods include cooling, anti-oxidation, moisturizing, soothing, and repairing.

[0005] In temperature-drifting thermal environments, human thermal comfort is significantly correlated with forehead temperature. A forehead temperature of 34.3-34.8℃ is considered comfortable. After infrared radiation exerts a thermal effect on the skin, using a face cream that lowers skin temperature to a comfortable level can reduce the damage caused by the thermal effect without causing additional irritation. Antioxidants can be achieved through free radical scavenging and improving oxidatively damaged cells, thereby reducing the negative effects of UVA-induced ROS on the skin. Moisturizing, soothing, and repairing can reduce the production of inflammatory factors in the skin caused by light and heat, reduce inflammation-induced extracellular matrix degradation, improve transepidermal water loss, and maintain the skin barrier to reduce damage from ultraviolet and infrared radiation and reduce melanin production after sun exposure.

[0006] Currently, most baby summer face creams on the market fail to simultaneously soothe and repair damage from both sunlight and heat, while also ensuring a comfortable, safe, and non-irritating formula.

[0007] The existing technology has the following drawbacks:

[0008] 1. Some baby and children's summer face cream products contain too many additives, including ingredients that are not suitable for baby and children's skin, such as fragrances, alcohol, and pigments, which can easily cause skin allergic reactions. The complex formulas make it difficult to meet the requirements of formula simplification.

[0009] 2. Some baby summer face creams achieve skin cooling by adding a lot of cooling agents, such as menthol; however, these cooling agents can cause additional irritation to the skin while cooling it down. This is because too many cooling agents can lower the skin temperature too much. When the skin temperature is too high, the drastic cooling can cause allergic symptoms due to the large temperature difference caused by thermal expansion and contraction, resulting in secondary damage.

[0010] 3. Existing summer face creams for infants and children cannot simultaneously reduce the damage to the skin caused by UVA, UVB, and infrared rays. For infants and children with delicate skin, it is essential to reduce the damage to the skin caused by light and heat while ensuring that the formula is comfortable, safe, and non-irritating.

[0011] Therefore, it is essential to develop a summer face cream that reduces the damage of light and heat to the skin while ensuring the comfort, safety, and non-irritation of the formula. This is of great significance for maintaining the skin health of infants and children in the summer. Summary of the Invention

[0012] The purpose of this invention is to provide an infant face cream that reduces photothermal damage to the skin, and a method for preparing the same. This invention has the advantage of simultaneously reducing both photodamage and thermal damage while maintaining a simplified formula.

[0013] The technical solution of the present invention:

[0014] A baby face cream for reducing photothermal damage to the skin includes sodium polyacrylate, carbomer, erythritol, camellia oil, p-hydroxyacetophenone, and 1,2-hexanediol; wherein the sodium polyacrylate comprises 0.2%-1% by mass, carbomer comprises 0.05%-0.5% by mass, erythritol comprises 0.5%-8% by mass, camellia oil comprises 0.3%-8% by mass, p-hydroxyacetophenone comprises 0.4%-0.6% by mass, 1,2-hexanediol comprises 0.4%-0.6% by mass, and the remaining mass is made up with water;

[0015] Sodium polyacrylate, carbomer, erythritol, and camellia oil are the active ingredients for reducing photothermal damage to the skin, while p-hydroxyacetophenone and 1,2-hexanediol are preservatives to prevent oxidation of the formula.

[0016] In the aforementioned baby face cream that reduces photothermal damage to the skin, the mass percentage of sodium polyacrylate is 0.6%, the mass percentage of carbomer is 0.25%, the mass percentage of erythritol is 5%, the mass percentage of camellia oil is 3%, the mass percentage of p-hydroxyacetophenone is 0.5%, the mass percentage of 1,2-hexanediol is 0.5%, and the remaining mass percentage is made up with water.

[0017] In the aforementioned baby face cream that reduces photothermal damage to the skin, the mass percentage of sodium polyacrylate is 1%, the mass percentage of carbomer is 0.5%, the mass percentage of erythritol is 8%, the mass percentage of camellia oil is 8%, the mass percentage of p-hydroxyacetophenone is 0.5%, the mass percentage of 1,2-hexanediol is 0.5%, and the remaining mass percentage is made up with water.

[0018] In the aforementioned baby face cream that reduces photothermal damage to the skin, the mass percentage of sodium polyacrylate is 0.2%, the mass percentage of carbomer is 0.05%, the mass percentage of erythritol is 0.5%, the mass percentage of camellia oil is 0.3%, the mass percentage of p-hydroxyacetophenone is 0.5%, the mass percentage of 1,2-hexanediol is 0.5%, and the remaining mass percentage is made up with water.

[0019] A method for preparing an infant face cream that reduces photothermal damage to the skin, the specific process of which is as follows:

[0020] Sodium polyacrylate, carbomer, erythritol, p-hydroxyacetophenone and 1,2-hexanediol in the corresponding mass ratio are added to water and dispersed. The mixture is heated to 75-80℃ and stirred at 150-200 rpm to dissolve evenly. After a homogeneous gel is formed, camellia oil in the corresponding mass ratio is added and homogenized at 4000-8000 rpm. The mixture is then stirred at 100 rpm and cooled to 38℃. After pH neutralization, the finished product is obtained.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] 1) This invention uses safe polymeric cooling agents (sodium polyacrylate, carbomer) and small molecule cooling agents (erythritol) in combination. By adjusting the ratio of cooling agents, it achieves the goal of cooling the human body to a suitable temperature, which improves the user experience of the product without causing additional irritation to the skin of infants and children.

[0023] 2) Erythritol, while acting as a small molecule cooling agent, also functions as a moisturizer and antioxidant. Erythritol can scavenge free radicals and improve the morphology of cells after oxidative damage, thereby increasing cell survival rate. This invention can lower the skin temperature to a comfortable level without being too cold and causing discomfort or irritation, further reducing heat damage to the skin.

[0024] 3) This invention achieves a simplified formulation while alleviating skin damage caused by light and heat by utilizing the multifunctional properties of the raw materials;

[0025] Camellia oil, as a skin protectant, has moisturizing, soothing (histamine inhibition and inflammatory factor inhibition), and antioxidant (promoting cell SOD and CAT activity) effects. It can also repair DNA damage and reduce melanin production. The camellia oil used in this invention is rich in triterpenoids, which can repair the extracellular matrix, effectively soothe and repair infant skin, enhance skin barrier function, and improve the skin's resistance to external stimuli. It has good efficacy without the addition of other active ingredients.

[0026] Camellia oil has multiple photoprotective pathways, and its use in summer cream products can further reduce the damage of light to the skin;

[0027] In summary, the baby face cream made with sodium polyacrylate, carbomer, erythritol and camellia oil can reduce the damage of photothermal to the skin, and achieve multiple functions from one ingredient to simplify the formula, improve the safety of the formula, and ensure the efficacy of the product.

[0028] This invention uses an optimized formula design, employs natural raw materials such as plant oils, and avoids the use of irritating cooling agents, thus reducing the irritation of the formula and avoiding the use of additives unsuitable for infants' skin, such as fragrances, alcohol, and pigments, effectively reducing the risk of triggering skin allergic reactions; it conforms to the principles of "natural and safe, essential efficacy, and minimalist formula", is easily absorbed by infants' skin, and has good biocompatibility. Attached Figure Description

[0029] Figure 1 These are comparison images of volunteers' skin before and after using Tivi700 samples three days prior to and after the experiment. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0031] Example 1. A baby face cream that reduces photothermal damage to the skin, comprising 0.6g sodium polyacrylate, 0.25g carbomer, 5g erythritol, 3g camellia oil, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol, which can be used in summer face creams.

[0032] A method for preparing an infant face cream that reduces photothermal damage to the skin includes the following steps:

[0033] Disperse 0.6g sodium polyacrylate, 0.25g carbomer, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol in water (to a total weight of 100g). Heat to 75-80℃ and stir at 150-200rpm until dissolved and homogeneous. After forming a uniform gel, add 3g of camellia oil and homogenize at 4000-8000rpm. Stir at 100rpm and cool to 38℃. Neutralize the pH to obtain the final product.

[0034] I. Mechanism of cooling skin to a suitable temperature and reducing heat damage to the skin:

[0035] 1. Use substances with high heat of solution: Erythritol absorbs a large amount of heat when dissolved in water, and has a good cooling effect.

[0036] 2. Utilizing the high specific heat capacity of water, when the gel formed by sodium polyacrylate and carbomer comes into contact with the skin, the temperature difference between the skin and the gel causes heat exchange, resulting in a decrease in skin temperature. The increase in the temperature of the hydrogel will accelerate the evaporation of water inside the gel. The evaporation of water will take away a large amount of heat, further lowering the temperature. The evaporation of water is a slow process, which can achieve a continuous cooling effect.

[0037] 3. The appropriate ratio of small molecule erythritol with high molecular weight sodium polyacrylate and carbomer can lower the skin to a comfortable temperature of 34.3-34.8℃.

[0038] II. The mechanism by which photoprotective ingredients reduce light damage to the skin:

[0039] 1. Camellia oil can absorb UVB rays, thus reducing UVB damage to the skin.

[0040] 2. Camellia oil has antioxidant properties (promoting cell SOD and CAT activity) to reduce UVA damage to the skin.

[0041] 3. Camellia oil can moisturize, inhibit inflammatory factors and histamine, and reduce dry, itchy, and red skin caused by light and heat.

[0042] 4. Camellia oil can reduce DNA damage caused by light exposure, thus reducing light damage.

[0043] 5. Camellia oil can reduce melanin production, thus reducing sunburn caused by ultraviolet rays.

[0044] 6. Camellia oil can inhibit the degradation of the extracellular matrix caused by inflammation, thereby reducing photodamage.

[0045] In summary, the summer baby cream made with sodium polyacrylate, carbomer, erythritol, and camellia oil can reduce the damage of light and heat to the skin. On this basis, it achieves multiple functions from a single ingredient, simplifying the formula, improving formula safety, and ensuring product efficacy.

[0046] Example 2. A baby face cream that reduces photothermal damage to the skin, comprising 1g sodium polyacrylate, 0.5g carbomer, 8g erythritol, 8g camellia oil, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol, which can be used in summer face creams.

[0047] A method for preparing an infant face cream that reduces photothermal damage to the skin includes the following steps:

[0048] Disperse 1g sodium polyacrylate, 0.5g carbomer, 8g erythritol, 0.5g p-hydroxyacetophenone, and 0.5g 1,2-hexanediol in water (to a total weight of 100g). Heat to 75-80℃ and stir at 150-200rpm until homogeneous. After forming a uniform gel, add 8g camellia oil and homogenize at 4000-8000rpm. Stir at 100rpm and cool to 38℃. Neutralize the pH to obtain the final product.

[0049] Example 3. A baby face cream that reduces photothermal damage to the skin, comprising 0.2g sodium polyacrylate, 0.05g carbomer, 0.5g erythritol, 0.3g camellia oil, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol, which can be used in summer face creams.

[0050] It also includes 0.5g of p-hydroxyacetophenone and 0.5g of 1,2-hexanediol as preservatives.

[0051] A method for preparing an infant face cream that reduces photothermal damage to the skin includes the following steps:

[0052] Disperse 0.2g sodium polyacrylate, 0.05g carbomer, 0.5g erythritol, 0.5g p-hydroxyacetophenone, and 0.5g 1,2-hexanediol in water (to a total weight of 100g). Heat to 75-80℃ and stir at 150-200rpm until homogeneous. After forming a uniform gel, add 0.3g camellia oil and homogenize at 4000-8000rpm. Stir at 100rpm and cool to 38℃. Neutralize the pH to obtain the final product.

[0053] Comparative Example

[0054] Comparative Example 1: 0.6g sodium polyacrylate, 0.25g carbomer, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, the mixture was stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0055] The difference from Example 1 is that camellia oil is not added.

[0056] Comparative Example 2: 0.6g sodium polyacrylate, 0.25g carbomer, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, 3g polydimethylsiloxane was added and homogenized at 4000-8000rpm. The mixture was stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0057] The difference from Example 1 is that polydimethylsiloxane is used instead of camellia oil.

[0058] Comparative Example 3: 0.6g sodium polyacrylate, 0.25g carbomer, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, 3g grape seed oil was added and homogenized at 4000-8000rpm. The mixture was then stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0059] The difference from Example 1 is that grape seed oil is used instead of camellia oil.

[0060] Comparative Example 4: 0.85g sodium polyacrylate, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, 3g camellia oil was added and homogenized at 4000-8000rpm. The mixture was then stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0061] The difference from Example 1 is that no carbomer is added.

[0062] Comparative Example 5: 0.85g carbomer, 5g erythritol, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, 3g camellia oil was added and homogenized at 4000-8000rpm. The mixture was then stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0063] The difference compared to Example 1 is that sodium polyacrylate is not added.

[0064] Comparative Example 6: 0.6g sodium polyacrylate, 0.25g carbomer, 5g glycerin, 0.5g p-hydroxyacetophenone and 0.5g 1,2-hexanediol were added to water (to a total weight of 100g) and dispersed. The mixture was heated to 75-80℃ and stirred at 150-200rpm until it was completely dissolved. After a homogeneous gel was formed, 3g camellia oil was added and homogenized at 4000-8000rpm. The mixture was then stirred at 100rpm and cooled to 38℃. After pH neutralization, the final product was obtained.

[0065] The difference from Example 1 is that glycerol is used instead of erythritol.

[0066] Experimental verification

[0067] Experiment 1

[0068] Infrared thermometers were used to detect changes in skin temperature before and after product use in volunteers to assess the product's effectiveness in reducing heat-induced skin damage. The results were averaged.

[0069] Table 1. Average skin temperature of volunteers before and after product application (°C)

[0070]

[0071] Based on temperature changes before and after product use, the summer cream made from a combination of sodium polyacrylate, carbomer, erythritol, and camellia oil has a good cooling effect, bringing the skin down to a comfortable temperature of 34.3-34.8℃.

[0072] Example 1 shows that the cooling effect of adding camellia oil is better than that of Comparative Example 1 without camellia oil and Comparative Example 3 with grape seed oil instead of camellia oil, and better than that of Comparative Example 2 with silicone oil instead of camellia oil. The reason is that the fatty acid composition of camellia oil is similar to the lipid composition of human skin surface. Compared with no oil, adding silicone oil or grape seed oil has better affinity to the skin, enhances absorption and reduces the occlusive effect of oil on the skin, allowing moisture to evaporate better and thus better lowering skin temperature.

[0073] Example 1 showed that the cooling effect of adding camellia oil was better than that of Comparative Example 6 (without erythritol), better than that of Comparative Example 5 (without sodium polyacrylate), and better than that of Comparative Example 4 (without carbomer), and was greater than the sum of their cooling effects. This indicates that the combination of sodium polyacrylate, carbomer, and erythritol also has a synergistic effect on cooling the skin.

[0074] In summary, sodium polyacrylate, carbomer, erythritol, and camellia oil have a synergistic effect in cooling the skin, i.e., reducing heat-induced skin damage.

[0075] Experiment 2

[0076] The changes in hemoglobin in volunteers' skin before and after product use were detected using the Mexameter MX18 probe to assess the product's effectiveness in reducing photothermal damage to the skin. The results were averaged.

[0077] Table 2. Average skin hemoglobin levels of volunteers three days before and after using the sample.

[0078]

[0079] Based on the change rate of heme before and after product use, Example 1 showed the strongest soothing effect on the skin after three days of use, which was far superior to the control sample. Based on the change rate, it can be concluded that sodium polyacrylate, carbomer, erythritol and camellia oil have a synergistic effect in cooling the skin, that is, reducing the damage to the skin caused by light and heat.

[0080] Comparative Examples 1 and 4-6 all showed some soothing effects. Comparative Example 5 was superior to Comparative Example 4, which was superior to Comparative Example 6, which was superior to Comparative Example 1. This indicates that the soothing effect of camellia oil is superior to erythritol, which is superior to carbomer, which is superior to sodium polyacrylate. The reason for this was analyzed through efficacy experiments. Camellia oil has the effects of reducing inflammatory factors and anti-oxidation. Erythritol has anti-oxidation and moisturizing effects. Carbomer and sodium polyacrylate have moisturizing effects. Carbomer has a better cooling effect than sodium polyacrylate and has a better soothing effect on heat damage.

[0081] The combination of the four ingredients has a better cooling effect and can reduce inflammatory factors.

[0082] Experiment 3

[0083] The changes in hemoglobin levels in volunteers' skin before and after product use were measured using a skin sensitivity tester to assess the product's effectiveness in reducing photothermal damage to the skin. Figure 1 As shown, it can be found that Example 1 has the best redness-reducing effect, followed by Comparative Examples 4 and 5, and then Comparative Examples 1 and 6. The test results are consistent with the heme test results.

[0084] This indicates that the combination of camellia oil, erythritol, carbomer, and sodium polyacrylate can synergistically reduce photothermal damage to the skin.

Claims

1. A baby face cream that reduces photothermal damage to the skin, characterized in that: The mixture includes sodium polyacrylate, carbomer, erythritol, camellia oil, p-hydroxyacetophenone, and 1,2-hexanediol; the sodium polyacrylate comprises 0.2%-1% by mass, carbomer comprises 0.05%-0.5% by mass, erythritol comprises 0.5%-8% by mass, camellia oil comprises 0.3%-8% by mass, p-hydroxyacetophenone comprises 0.4%-0.6% by mass, 1,2-hexanediol comprises 0.4%-0.6% by mass, and the remaining mass is made up with water.

2. The infant face cream for reducing photothermal damage to the skin according to claim 1, characterized in that: The sodium polyacrylate comprises 0.6% by mass, carbomer comprises 0.25% by mass, erythritol comprises 5% by mass, camellia oil comprises 3% by mass, p-hydroxyacetophenone comprises 0.5% by mass, 1,2-hexanediol comprises 0.5% by mass, and the remaining mass is made up with water.

3. The infant face cream for reducing photothermal damage to the skin according to claim 1, characterized in that: The composition of the sodium polyacrylate is 1% by mass, the composition of carbomer is 0.5% by mass, the composition of erythritol is 8% by mass, the composition of camellia oil is 8% by mass, the composition of p-hydroxyacetophenone is 0.5% by mass, the composition of 1,2-hexanediol is 0.5% by mass, and the remaining composition is made up with water.

4. The infant face cream for reducing photothermal damage to the skin according to claim 1, characterized in that: The sodium polyacrylate comprises 0.2% by mass, carbomer comprises 0.05% by mass, erythritol comprises 0.5% by mass, camellia oil comprises 0.3% by mass, p-hydroxyacetophenone comprises 0.5% by mass, 1,2-hexanediol comprises 0.5% by mass, and the remaining mass is made up with water.

5. The method for preparing the infant face cream according to any one of claims 1-4, characterized in that, The specific process is as follows: Sodium polyacrylate, carbomer, erythritol, p-hydroxyacetophenone and 1,2-hexanediol in the corresponding mass ratio are added to water and dispersed. The mixture is heated to 75-80℃ and stirred at 150-200 rpm to dissolve evenly. After a homogeneous gel is formed, camellia oil in the corresponding mass ratio is added and homogenized at 4000-8000 rpm. The mixture is then stirred at 100 rpm and cooled to 38℃. After pH neutralization, the finished product is obtained. The sodium polyacrylate comprises 0.2%-1% by mass, carbomer comprises 0.05%-0.5% by mass, erythritol comprises 0.5%-8% by mass, camellia oil comprises 0.3%-8% by mass, p-hydroxyacetophenone comprises 0.4%-0.6% by mass, 1,2-hexanediol comprises 0.4%-0.6% by mass, and the remaining mass is made up with water.

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