Oil-controlling and refreshing SPF40 sunscreen and preparation method thereof

Abstract

This invention provides an oil-controlling and refreshing SPF40 sunscreen and its preparation method, relating to the field of skincare products. The sunscreen's ingredients include sunscreen agents, emollients, thickeners, emulsifiers, skin conditioning agents, tocopherol, olive fruit extract, horse chestnut seed extract, Rumex acetosa root extract, preservatives, fragrances, and deionized water. This sunscreen exhibits good oil control, a refreshing effect, and a high SPF value.

Description

Technical Field

[0001] This invention relates to the field of skincare products, specifically to an oil-controlling and refreshing SPF40 sunscreen and its preparation method. Background Technology

[0002] Sunscreen is a cosmetic product containing sunblockers that block or absorb ultraviolet (UV) rays to prevent skin from tanning or sunburn. Sunscreens are classified into physical and chemical types based on their ingredients. Physical sunscreens primarily work by using mineral particles and other light-reflecting agents to block sunlight from damaging the skin. Because these particles are relatively large and not absorbed by the skin, they are generally considered safer. Chemical sunscreens, on the other hand, rely mainly on chemical ingredients to absorb light and may contain substances that some people may not tolerate (see book: Gu Weicheng. Concise Edition of Gynecological Dermatology [M]. Xi'an: Shaanxi Science and Technology Press, 2018: 502.). The Sun Protection Factor (SPF) is the ratio of the energy required to produce minimal erythema on skin protected by sunscreen to the energy required to produce the same degree of erythema on unprotected skin. Generally speaking, while sunscreens have a high SPF, their thick texture can cause greasiness or discomfort. To address this issue, some researchers have studied the oil-control and refreshing effects of sunscreens.

[0003] For example, the literature: Li Honghai, Zhang Yunling. How to develop a refreshing high SPF sunscreen formula [J]. Daily Chemical Science, 2018, 41(6):60-65. mentions the selection and compatibility of sunscreen agents, the selection of oils, the combination of different emulsifier systems, and the use of film-forming agents to ensure a refreshing skin feel. Another example is the patent CN105534737A, which discloses a refreshing and oil-controlling sunscreen composition. This sunscreen composition contains aluminum octenyl succinate and polyhydroxystearic acid. The two are added to the cosmetic in an appropriate ratio. Even when it contains a high content of oil-soluble sunscreen agents and inorganic sunscreen agents, its feel is refreshing and non-greasy, and it has the function of absorbing and controlling oil. Moreover, it does not cause whitening after application. Patent CN109453065A discloses a refreshing, high SPF / PA value oil-in-water sunscreen and its preparation method, comprising the following components by weight: 5-20 parts of hydrophobically modified titanium dioxide or zinc oxide, 3-4 parts of a mixture of sodium acrylate / sodium acryloyl dimethyl taurate copolymer / isohexadecane / polysorbate-80, and 15-25 parts of moisturizing oil. This invention utilizes the surface activity of hydrophobically modified nano-sized titanium dioxide or zinc oxide particles for emulsification. Simultaneously, a thickener is added to the aqueous phase to aid stabilization, resulting in a sunscreen with a refreshing feel.

[0004] Given the problem that existing sunscreens have a thick texture, which can cause greasiness or discomfort, it is essential to find an oil-controlling and refreshing SPF40 sunscreen and its preparation method. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by providing an oil-controlling and refreshing SPF40 sunscreen and its preparation method. The sunscreen has good oil control and refreshing effects as well as a high SPF value.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention provides a sunscreen, the raw materials of which include sunscreen agents, emollients, thickeners, emulsifiers, skin conditioning agents, tocopherols, olive fruit extract, horse chestnut seed extract, wrinkled raspberry root extract, preservatives, fragrances and water.

[0008] Further, by weight, the ingredients of the sunscreen include: 13-26 parts sunscreen agent, 8.1-18.3 parts emollient, 1.1-4.3 parts thickener, 2-8.5 parts emulsifier, 1.2-3.6 parts skin conditioning agent, 0.1-0.2 parts tocopherol, 0.2-0.4 parts olive fruit extract, 0.2-0.4 parts horse chestnut seed extract, 0.1-0.4 parts raspberry root extract, 0.7-2 parts preservative, 0.1-0.3 parts fragrance, and 50-60 parts water.

[0009] Preferably, the sunscreen contains, by weight, 21 parts sunscreen agent, 13.15 parts emollient, 3.2 parts thickener, 5 parts emulsifier, 2.4 parts skin conditioning agent, 0.1 parts tocopherol, 0.4 parts olive fruit extract, 0.3 parts horse chestnut seed extract, 0.2 parts crescent moon root extract, 1.1 parts preservative, 0.15 parts fragrance and 53 parts water.

[0010] Furthermore, the weight ratio of the olive fruit extract, horse chestnut seed extract and wrinkled raspberry root extract is (2-4):(2-4):(1-4).

[0011] Preferably, the weight ratio of the olive fruit extract, horse chestnut seed extract, and wrinkled raspberry root extract is 4:3:2.

[0012] Further, the weight ratio of polydimethylsiloxane, allantoin, bisabolol, olive fruit extract, horse chestnut seed extract and rhizome root extract is (1-3):(0.1-0.3):(0.1-0.3):(0.2-0.4):(0.2-0.4):(0.1-0.4).

[0013] Preferably, the weight ratio of polydimethylsiloxane, allantoin, bisabolol, olive fruit extract, horse chestnut seed extract and rhizome root extract is 2:0.2:0.2:0.4:0.3:0.2.

[0014] Further, the emollient includes one or more of C12-15 benzoate, butylene glycol, dioctyl carbonate, glycerin, and ethylhexylglycerin; the thickener includes cetyl alcohol and / or xanthan gum; the emulsifier includes one or more of cetyl phosphate potassium, glyceryl stearate, and PEG-100 stearate; the skin conditioning agent includes one or more of polydimethylsiloxane, allantoin, and bisabolol; and the fragrance includes perfume.

[0015] Preferably, the sunscreen agent is ethylhexyl methoxycinnamate, octocrylene, titanium dioxide, butyl methoxydibenzoylmethane, and ethylhexyl salicylate; the emollient is C12-15 benzoate, butylene glycol, dioctyl carbonate, glycerin, and ethylhexylglycerin; the thickener is cetyl alcohol and xanthan gum; the emulsifier is potassium cetyl phosphate, glyceryl stearate, and PEG-100 stearate; the preservative is phenoxyethanol, methylparaben, and propylparaben; the skin conditioning agent is polydimethylsiloxane, allantoin, and bisabolol; and the fragrance is a perfume.

[0016] Furthermore, the ingredients of the sunscreen include: ethylhexyl methoxycinnamate, octocrylene, titanium dioxide, C12-15 benzoyl alcohol, butylene glycol, potassium cetyl phosphate, dioctyl carbonate, cetyl alcohol, butyl methoxydibenzoylmethane, glycerin, polydimethylsiloxane, glyceryl stearate, PEG-100 stearate, ethylhexyl salicylate, phenoxyethanol, allantoin, bisabolol, xanthan gum, methylparaben, fragrance, tocopherol, ethylhexylglycerin, propylparaben, olive fruit extract, horse chestnut seed extract, raspberry root extract, and water.

[0017] More preferably, by weight, the ingredients of the sunscreen include: 6 parts ethylhexyl methoxycinnamate, 5 parts octocrylene, 6 parts titanium dioxide, 4 parts C12-15 benzoyl alcohol, 4 parts butanediol, 3 parts potassium cetyl phosphate, 3 parts dioctyl carbonate, 3 parts cetyl alcohol, 2.5 parts butyl methoxydibenzoylmethane, 2 parts glycerin, 2 parts polydimethylsiloxane, 1 part glyceryl stearate, and 1 part PEG- 100 parts stearate, 1.5 parts ethylhexyl salicylate, 0.8 parts phenoxyethanol, 0.2 parts allantoin, 0.2 parts bisabolol, 0.2 parts xanthan gum, 0.2 parts methylparaben, 0.15 parts fragrance, 0.1 parts tocopherol, 0.15 parts ethylhexylglycerin, 0.1 parts propylparaben, 0.4 parts olive fruit extract, 0.3 parts horse chestnut seed extract, 0.2 parts crested clover root extract, and 53 parts water.

[0018] Furthermore, the present invention also provides a method for preparing the above-mentioned sunscreen, comprising the following steps:

[0019] (1) After mixing sunscreen, emollient, thickener, emulsifier, skin conditioner, tocopherol and water, heat to obtain material A;

[0020] (2) After mixing olive fruit extract, horse chestnut seed extract, wrinkled raspberry root extract and water, heat to obtain material B;

[0021] (3) Add material A to material B, add preservative and fragrance, homogenize and stir, and cool to obtain the final product.

[0022] Furthermore, the heating temperature described in steps (1) and (2) is 80-85°C.

[0023] The technical effects achieved by this invention are:

[0024] The oil-controlling and refreshing SPF40 sunscreen of this invention is prepared by rationally combining sunscreen agents, emollients, thickeners, emulsifiers and skin conditioning agents, especially by compounding olive fruit extract, horse chestnut seed extract and wrinkled raspberry root extract, and by reasonably adjusting the dosage of glycerin, olive fruit extract and wrinkled raspberry root extract, so as to prepare a sunscreen with good oil control and refreshing effect, and the sunscreen has a high SPF value while ensuring a comfortable skin feel. Detailed Implementation

[0025] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] Before further describing specific embodiments of the present invention, it should be understood that the scope of protection of the present invention is not limited to the specific embodiments described below; it should also be understood that the terminology used in the embodiments of the present invention is for describing specific embodiments and not for limiting the scope of protection of the present invention.

[0027] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] It is worth noting that the raw materials used in this invention are all commercially available products, as shown in Table 1.

[0029] Table 1. Raw material information of the sunscreen in this invention

[0030]

[0031] Examples 1-2

[0032] Table 2. Composition and content of sunscreens in Examples 1-2 of the present invention (unit: parts)

[0033]

[0034] The preparation method of the sunscreen in Examples 1-2 in the table above includes the following steps:

[0035] (1) Mix the sunscreen, emollient, thickener, emulsifier, skin conditioner, tocopherol and water according to the formulation dosage, and heat at 82°C to obtain material A;

[0036] (2) After mixing olive fruit extract, horse chestnut seed extract, wrinkled raspberry root extract and water, heat at 82°C to obtain material B;

[0037] (3) Add material A to material B, add preservative and fragrance, homogenize and stir, and cool to obtain the final product.

[0038] Comparative Example 1

[0039] The only difference from Example 1 is that the olive fruit extract and horse chestnut seed extract in the formula are replaced with an equal amount of rhizome root extract. That is, by weight, the ingredients of the sunscreen include: 6 parts ethylhexyl methoxycinnamate, 5 parts octocrylene, 6 parts titanium dioxide, 4 parts C12-15 benzoate, 4 parts butylene glycol, 3 parts potassium cetyl phosphate, 3 parts dioctyl carbonate, 3 parts cetyl alcohol, and 2.5 parts butyl methoxybenzoyl. Methane, 2 parts glycerin, 2 parts polydimethylsiloxane, 1 part glyceryl stearate, 1 part PEG-100 stearate, 1.5 parts ethylhexyl salicylate, 0.8 parts phenoxyethanol, 0.2 parts allantoin, 0.2 parts bisabolol, 0.2 parts xanthan gum, 0.2 parts methylparaben, 0.15 parts fragrance, 0.1 parts tocopherol, 0.15 parts ethylhexylglycerin, 0.1 parts propylparaben, 0.9 parts *Cercis chinensis* root extract, and 53 parts water.

[0040] The preparation method is the same as in Examples 1-2, except that olive fruit extract and horse chestnut seed extract are not added.

[0041] Comparative Example 2

[0042] The only difference from Example 1 is that the olive fruit extract and raspberry root extract in the formulation are replaced with an equal amount of horse chestnut seed extract. That is, by weight, the sunscreen ingredients include: 6 parts ethylhexyl methoxycinnamate, 5 parts octocrylene, 6 parts titanium dioxide, 4 parts C12-15 benzoate, 4 parts butylene glycol, 3 parts potassium cetyl phosphate, 3 parts dioctyl carbonate, 3 parts cetyl alcohol, and 2.5 parts butyl methoxybenzoyl. Methane, 2 parts glycerin, 2 parts dimethicone, 1 part glyceryl stearate, 1 part PEG-100 stearate, 1.5 parts ethylhexyl salicylate, 0.8 parts phenoxyethanol, 0.2 parts allantoin, 0.2 parts bisabolol, 0.2 parts xanthan gum, 0.2 parts methylparaben, 0.15 parts fragrance, 0.1 parts tocopherol, 0.15 parts ethylhexylglycerin, 0.1 parts propylparaben, 0.9 parts horse chestnut seed extract, and 53 parts water.

[0043] The preparation method is the same as in Examples 1-2, except that olive fruit extract and raspberry root extract are not added.

[0044] Comparative Example 3

[0045] The only difference from Example 1 is that the extracts of *Acer palmatum* root and *Aesculus hippocastanum* seed are replaced with an equal amount of olive fruit extract. That is, by weight, the sunscreen ingredients include: 6 parts ethylhexyl methoxycinnamate, 5 parts octocrylene, 6 parts titanium dioxide, 4 parts C12-15 benzoate, 4 parts butylene glycol, 3 parts potassium cetyl phosphate, 3 parts dioctyl carbonate, 3 parts cetyl alcohol, and 2.5 parts butyl methoxybenzoyl Ingredients: 2 parts methyl methacrylate, 2 parts glycerin, 2 parts dimethicone, 1 part glyceryl stearate, 1 part PEG-100 stearate, 1.5 parts ethylhexyl salicylate, 0.8 parts phenoxyethanol, 0.2 parts allantoin, 0.2 parts bisabolol, 0.2 parts xanthan gum, 0.2 parts methylparaben, 0.15 parts fragrance, 0.1 parts tocopherol, 0.15 parts ethylhexylglycerin, 0.1 parts propylparaben, 0.9 parts olive fruit extract, and 53 parts water.

[0046] The preparation method is the same as in Examples 1-2, except that no wrinkled raspberry root extract or horse chestnut seed extract is added.

[0047] Comparative Example 4

[0048] The only difference from Example 1 is that the weight ratio of polydimethylsiloxane, allantoin, bisabolol, olive fruit extract, horse chestnut seed extract, and rhizome root extract is 0.5:0.5:0.05:0.5:0.1:0.5 (the total amount of the six ingredients is the same as in Example 1). That is, by weight, the raw materials of the sunscreen include: 6 parts ethylhexyl methoxycinnamate, 5 parts octocrylene, 6 parts titanium dioxide, 4 parts C12-15 benzoate, 4 parts butylene glycol, 3 parts potassium cetyl phosphate, 3 parts dioctyl carbonate, 3 parts cetyl alcohol, and 2.5 parts... Butyl methoxydibenzoylmethane, 2 parts glycerin, 0.77 parts polydimethylsiloxane, 1 part glyceryl stearate, 1 part PEG-100 stearate, 1.5 parts ethylhexyl salicylate, 0.8 parts phenoxyethanol, 0.77 parts allantoin, 0.07 parts bisabolol, 0.2 parts xanthan gum, 0.2 parts methylparaben, 0.15 parts fragrance, 0.1 parts tocopherol, 0.15 parts ethylhexylglycerin, 0.1 parts propylparaben, 0.77 parts olive fruit extract, 0.15 parts horse chestnut seed extract, 0.77 parts tamarisk root extract, and 53 parts water.

[0049] The preparation method is the same as in Examples 1-2, except that the amount of the above-mentioned components added is different.

[0050] 1. Subject selection criteria:

[0051] 1.1 Selection Criteria:

[0052] (1) Age 18-60 years old, both men and women are eligible;

[0053] (2) Good overall health and no significant systemic diseases;

[0054] (3) Can strictly follow the requirements and schedule of the research plan and sign informed consent and confidentiality agreement.

[0055] 1.2 Exclusion criteria:

[0056] (1) Women who are currently pregnant, breastfeeding, or planning to become pregnant in the next two months;

[0057] (2) Acute inflammation or other skin diseases on the face (such as rosacea, eczema, lupus erythematosus, seborrheic dermatitis, psoriasis, severe epidermal shedding, etc.);

[0058] (3) Has a highly sensitive constitution or is allergic to cosmetics;

[0059] (4) Those with obvious sunburn, scars, excessive hair, or other conditions on their face that may affect the test results;

[0060] (5) Take or use any medications that may affect skin condition or reaction within the past month, such as antihistamines, antibiotics, insulin, anti-inflammatory drugs, vitamin A, steroids, aspirin, thyroid medications, etc.

[0061] (6) Those who have used hormone drugs and immunosuppressants within the past month;

[0062] (7) Individuals who are currently or have been participating in other clinical trials at the test site within the past month;

[0063] (8) The face has undergone cosmetic treatments such as chemical peels (fruit acid treatment), microdermabrasion, and laser resurfacing within the past three months.

[0064] 1.3 Rejection Criteria:

[0065] Serious adverse reactions during the trial and failure to comply with the research and development plan (such as using other cosmetics or drugs during the test or requesting to withdraw for other reasons).

[0066] 2. Experiment:

[0067] 2.1 Oil control effect of the sunscreen in this invention

[0068] 2.1.1 Subject Requirements: Subjects should cleanse the test area with an alkaline soap. Sebum secretion should be measured 3 hours after cleansing. For bilateral forehead sebum measurements, the sebum secretion level approximately 0.5 cm above the center of the eyebrows should be relatively high (e.g., sebum secretion > 120 μg / cm² for men). 2 Women with forehead sebum secretion >100μg / cm 2 The difference between the two sides was less than 20%.

[0069] 2.1.2 Test methods:

[0070] After washing their faces with an alkaline soap-based cleanser, subjects patted their faces dry with absorbent paper towels. Sebum secretion was measured using a skin epidermal oil content analyzer and recorded as the initial value. A quantitative sample was applied to half of the face at a concentration of 2 mg / cm². 2 The other half of the face was left untreated as a blank control. The application area was a 3cm x 5cm skin area on each side of the face. Sebum secretion was measured again after 4 hours and recorded as the values. The oil content growth rate after 4 hours was calculated using the following formula:

[0071] Oil content growth rate = ×100%.

[0072] Test environment temperature: 20℃-22℃, relative humidity: 50%.

[0073] 2.1.3 Test Results

[0074] Table 3. Oil control effect results of sunscreens in various examples of this invention.

[0075]

[0076] According to the test results of the present invention, although the oil content in each example group showed an increasing trend, the increase in oil content after using the sunscreen of each embodiment in the present invention was significantly less than that in the comparative example group. This indicates that the sunscreen of each embodiment in the present invention has the effect of oil control and refreshing, can effectively inhibit oil secretion, and ensure skin comfort.

[0077] 2.2 Sunscreen effect of the sunscreen in this invention

[0078] 2.2.1 Test Method:

[0079] Secure the sample plate with 3M tape, and evenly apply the sample from each example to a 50cm section. 2 Sample plate, application amount 2 mg / cm 2 Dry the sample in a dark environment with a temperature of 20-22℃ and a humidity of 50% for 20 minutes. Use an SPF analyzer to randomly select 9 points to test the SPF value. Each sample was tested 3 times and the average value was taken. The results are summarized in the table below.

[0080] 2.2.2 Test Results

[0081] Table 4. Sunscreen efficacy results of sunscreens in various examples of this invention.

[0082]

[0083] According to the experimental results of the invention, the in vitro test results show that the SPF value of the sunscreens in each embodiment of the present invention can reach above 40, indicating a good sun protection effect. In comparison, the sun protection effect of the sunscreens in the comparative examples is significantly weaker than that in the embodiment groups.

[0084] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A sunscreen, characterized in that: The raw materials include sunscreen, emollient, thickener, emulsifier, skin conditioning agent, tocopherol, olive fruit extract, horse chestnut seed extract, crescent moon root extract, preservative, fragrance, and water; the skin conditioning agent is polydimethylsiloxane, allantoin, and bisabolol; the weight ratio of polydimethylsiloxane, allantoin, bisabolol, olive fruit extract, horse chestnut seed extract, and crescent moon root extract is (1-3):(0.1-0.3):(0.1-0.3):(0.2-0.4):(0.2-0.4):(0.1-0.4).

2. The sunscreen according to claim 1, characterized in that: By weight, the ingredients include: 13-26 parts sunscreen, 8.1-18.3 parts emollient, 1.1-4.3 parts thickener, 2-8.5 parts emulsifier, 1.2-3.6 parts skin conditioning agent, 0.1-0.2 parts tocopherol, 0.2-0.4 parts olive fruit extract, 0.2-0.4 parts horse chestnut seed extract, 0.1-0.4 parts crescent moon root extract, 0.7-2 parts preservative, 0.1-0.3 parts fragrance, and 50-60 parts water.

3. The sunscreen according to claim 2, characterized in that: By weight, the ingredients include: 21 parts sunscreen, 13.15 parts emollient, 3.2 parts thickener, 5 parts emulsifier, 2.4 parts skin conditioning agent, 0.1 part tocopherol, 0.4 parts olive fruit extract, 0.3 parts horse chestnut seed extract, 0.2 parts crescent moon root extract, 1.1 parts preservative, 0.15 parts fragrance and 53 parts water.

4. The sunscreen according to claim 1, characterized in that: The weight ratio of the olive fruit extract, horse chestnut seed extract and wrinkled raspberry root extract is (2-4):(2-4):(1-4).

5. The sunscreen according to claim 4, characterized in that: The weight ratio of the olive fruit extract, horse chestnut seed extract, and wrinkled raspberry root extract is 4:3:

2.

6. The sunscreen according to claim 1, characterized in that: The emollients include one or more of C12-15 benzoate, butylene glycol, dioctyl carbonate, glycerin, and ethylhexylglycerin; the thickeners include cetyl alcohol and / or xanthan gum; and the emulsifiers include one or more of cetyl phosphate potassium, glyceryl stearate, and PEG-100 stearate.

7. The sunscreen according to claim 1, characterized in that: Raw materials include: Ethylhexyl methoxycinnamate, octocrylene, titanium dioxide, C12-15 benzoate, butylene glycol, potassium cetyl phosphate, dioctyl carbonate, cetyl alcohol, butyl methoxydibenzoylmethane, glycerin, polydimethylsiloxane, glyceryl stearate, PEG-100 stearate, ethylhexyl salicylate, phenoxyethanol, allantoin, bisabolol, xanthan gum, methylparaben, fragrance, tocopherol, ethylhexylglycerin, propylparaben, olive fruit extract, horse chestnut seed extract, cristata root extract, and water.

8. The method for preparing sunscreen according to any one of claims 1-7, characterized in that: Includes the following steps: (1) After mixing sunscreen, emollient, thickener, emulsifier, skin conditioner, tocopherol and water, heat to obtain material A; (2) After mixing olive fruit extract, horse chestnut seed extract, wrinkled raspberry root extract and water, heat to obtain material B; (3) Add material A to material B, add preservative and fragrance, homogenize and stir, and cool to obtain the final product.

9. The preparation method according to claim 8, characterized in that: The heating temperature described in steps (1) and (2) is 80-85℃.

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