CN114983841A - Water-in-oil peony sun block without silicone oil and preparation method thereof - Google Patents

Abstract

The invention discloses a water-in-oil peony sunscreen lotion without silicone oil and a preparation method thereof, belonging to the technical field of cosmetics; a sunscreen lotion of the invention comprises the following components in parts by mass: 18.02-23.2 parts of a sunscreen agent, an emulsifier 1-2.2 parts, thickener 0.01-0.45 parts, film-forming agent 0.01-1 part, silica 0.1-2 parts, solvent 20-80 parts, ester-alkane mixture 0.04-22 parts, the ester-alkane mixture is composed of diethyl carbonate It is composed of hexyl hexyl ester, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane; the sunscreen provided by the invention does not contain silicone oil, which can avoid the destructive effect of silicone oil on human skin and the environment; The sunscreen lotion provided by the invention has refreshing skin feeling, extremely low allergic reaction rate, can effectively inhibit oil secretion, reduce transdermal water loss, and has a high SPF value; in addition, the sunscreen lotion provided by the invention has a simple preparation method and simple operation.

Description

A kind of water-in-oil peony sunscreen lotion without silicone oil and preparation method thereof

technical field

The invention belongs to the technical field of cosmetics, and in particular relates to a water-in-oil peony sunscreen lotion without silicone oil and a preparation method thereof.

Background technique

In recent years, studies at home and abroad have found that the skin is damaged by various external pressure factors: dry air, drastic changes in temperature, bacteria, viruses, air pollution and light pollution, and damage, among which the result of light damage will be skin sunburn. injury, pigmentation and photoaging. When the skin is exposed to excessive ultraviolet rays, it will damage epidermal cells, activate tyrosinase, accelerate pigment synthesis, destroy the skin's moisturizing function, make the skin dry, damage the elastic fibers in the dermis, and cause fine lines. Under strong irradiation, it will also cause skin inflammation, burns, and even skin cancer in severe cases. Therefore, sunscreen is an indispensable part of human skin care, and the choice of sunscreen products has become particularly important.

Sunscreen products are generally divided into oil-in-water sunscreens and water-in-oil sunscreens. Oil-in-water sunscreens have poor water resistance and are not suitable for people who work outdoors for a long time, while water-in-oil sunscreens have strong water resistance, both indoors and outdoors. It has a high-efficiency sunscreen effect, but in order to achieve a thin skin feel, most of the water-in-oil sunscreens on the market will choose a silicone oil system, but ignore that the silicone oil itself also has certain harm to the human body. Silicone oil is a non-polar oil and has a strong penetrating effect. Some people with sensitive skin will experience redness and itching when using sunscreen products with silicone oil system, which not only does not protect the skin, but also damages the skin. . And now environmental protection is advocated. Some commonly used sunscreens on the market also have a certain harmful effect on nature. According to research, about 6-14,000 tons of sunscreens are washed and entered into coral reef areas every year. Thousands of sunscreen products contain two types of sunscreens. The most threatening chemicals are ethylhexyl methoxycinnamate and benzophenone-3. These two sunscreen factors absorb ultraviolet rays and cause bleaching of coral reefs. Among them, benzophenone-3 will also Stops the growth of baby corals, which are toxic to several different coral species in laboratory tests, causes corals to bleach at cooler temperatures, and reduces their resilience to climate change.

At present, there is no silicone oil-free water-in-oil peony sunscreen in cosmetics that is friendly to human skin and environment, and is beautiful and full of green.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a sunscreen that does not contain silicone oil, is environmentally friendly, and is friendly to human skin and a preparation method thereof.

In order to achieve the above purpose, the technical scheme adopted in the present invention is: a water-in-oil peony sunscreen lotion without silicone oil, the sunscreen lotion comprises the following components by mass: 18.02-23.2 parts of sunscreen agent, 1-2.2 parts of emulsifier parts, 0.01-0.45 parts of thickener, 0.01-1 part of film-forming agent, 0.1-2 parts of silica, 20-80 parts of solvent, 0.04-22 parts of ester alkane mixture; the ester alkane mixture is composed of diethylhexyl carbonate , dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane composition.

The silicone oil-free water-in-oil peony sunscreen provided by the present invention adopts ester alkane mixture to replace conventional silicone oil, on the one hand, the destructive effect of silicone oil on human skin and the environment can be avoided, and on the other hand, the combination of the four components can be used. , which can make the effect of the obtained sunscreen exceed the effect of conventional use of silicone oil, which can achieve lower allergic reaction rate, higher oil secretion inhibition rate, and less transdermal water loss. Specifically, diethylhexyl carbonate has extremely low viscosity, high spreadability, and good solubilization of crystalline active substances, and can well disperse sunscreen agents, so that the prepared sunscreen lotion feels refreshing on the skin; dioctyl carbonate Ester is a new type of emollient, which has a very dry skin feel and good spreadability, its effect is comparable to that of volatile silicone oil, has good solubility for sunscreen agents, and can reduce the amount of sunscreen prepared. Greasy feeling; C12-15 alcohol benzoate has excellent solubility for sunscreens, so that the prepared sunscreen feels refreshing and non-sticky; C9-12 alkanes are high-purity alkanes derived from plant raw materials, which belong to non-polar It has a refreshing skin feel, obvious slippery feeling, and extremely strong spreadability, and has a skin feel similar to silicone oil, which can reduce the greasy feeling of sunscreen lotion; the present invention can achieve the achievement that cannot be achieved by using the four components in combination. Effect.

As a preferred embodiment of the sunscreen lotion of the present invention, the mass ratio of the diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane is diethylhexyl carbonate: Dioctyl carbonate: C12-15 alcohol benzoate: C9-12 alkane=(0.01-4):(0.01-6):(0.01-6):(0.01-6).

As a preferred embodiment of the sunscreen lotion of the present invention, the mass ratio of the diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane is diethylhexyl carbonate: Dioctyl carbonate: C12-15 alcohol benzoate: C9-12 alkane = (1.8-2.2): (1.8-2.2): (1.8-2.2): (2.6-3.4).

When the mass ratio of diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane is diethylhexyl carbonate: dioctyl carbonate: C12-15 alcohol benzoate : C9-12 alkane=(1.8-2.2): (1.8-2.2): (1.8-2.2): (2.6-3.4), the obtained sunscreen has the best skin feeling, and the percentage of volunteers who feel fresh than 99%.

As a preferred embodiment of the sunscreen lotion of the present invention, the sunscreen lotion further includes the following components in parts by mass: 0.12-0.6 parts of antioxidants, 0.1-1.83 parts of skin conditioners, 0.1-0.5 parts of preservatives, and 0.01 parts of chelating agents -0.05 servings.

As a preferred embodiment of the sunscreen lotion of the present invention, the sunscreen agents include plant sunscreen agents and non-plant sunscreen agents; the plant sunscreen agents include peony seed oil and peony fermentation broth, and the non-plant sunscreen agents include titanium dioxide, At least one of isoamyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyltriazine, ethylhexyl salicylate, and phenylbenzimidazole sulfonic acid.

As a preferred embodiment of the sunscreen of the present invention, the mass ratio of the plant sunscreen agent to the non-plant sunscreen agent is (0.02-1.2): (18-22).

In the present invention, a plant sunscreen agent and a non-plant sunscreen agent are selected for compound use, and the presence of the plant sunscreen agent can help the non-plant sunscreen agent to increase the SPF; at the same time, the types of sunscreen agents selected in the present invention are all skin-friendly, mild, non-irritating, and beautiful. Practice an all-green, green and environmentally friendly sunscreen. Among them, titanium dioxide is treated with stearic acid and aluminum hydroxide, replacing the conventional silicon-treated titanium dioxide; isoamyl p-methoxycinnamate, with a molecular weight of 192.21, and a legal limit of 10%, is ethyl methoxycinnamate. Substitute for ethylhexyl ester; bis-ethylhexyloxyphenol methoxyphenyltriazine is a new type of broad-spectrum UV absorber with a molecular weight of 627.8, which mainly absorbs ultraviolet rays with a wavelength of 310-343nm, and has lipid solubility and photostability , the legal limit is 10%; ethylhexyl salicylate, with a molecular weight of 250.34, belongs to UVB sunscreens, mainly absorbing ultraviolet rays with a wavelength of 280-340nm, and the legal limit is 5%; phenylbenzimidazole sulfonic acid, water-soluble It is a UVB sunscreen agent with a molecular weight of 274.3, mainly absorbing ultraviolet rays with a wavelength of 280-320 nm, and the regulatory limit is 8% (calculated as acid). Through the joint action of plant sunscreen agents and different types of non-plant sunscreen agents, medium and long-wave ultraviolet rays can be effectively absorbed, and a significant sunscreen effect can be achieved.

As a preferred embodiment of the sunscreen lotion of the present invention, the emulsifier includes at least one of polyglycerol emulsifier, Span, Tween, and liquid crystal emulsifier; the thickener includes distearyl dimethylammonium Hectorite; the film-forming agent includes VP/VA copolymer, acrylic acid (ester) type/ethylhexyl acrylate copolymer, acrylic acid (ester) type/dimethylaminoethyl methacrylate copolymer, polymer At least one of amide-8; the solvent includes at least one of water and ethanol.

As a preferred embodiment of the sunscreen of the present invention, the emulsifier includes polyglycerol-3 diisostearate and sorbitan isostearate; the thickener includes distearyl dimethylammonium lithium monoxide Destone; the film-forming agent includes VP/hexadecene copolymer; the solvent includes water and ethanol.

As a preferred embodiment of the sunscreen of the present invention, the antioxidant includes at least one of tocopheryl acetate, carnosine, and tetrahydromethylpyrimidine carboxylic acid; the skin conditioning agent includes arginine, epigallium At least one of catechol gallic acid glucoside (EGCD); the preservative includes at least one of sodium chloride, p-hydroxyacetophenone; the chelating agent includes EDTA-2Na, sodium citrate, glucose at least one of sodium.

As a preferred embodiment of the sunscreen of the present invention, the antioxidants include tocopheryl acetate, carnosine and tetrahydromethylpyrimidine carboxylic acid; the skin conditioning agents include arginine and epigallocatecholgallic acid glucoside; the preservatives include sodium chloride and p-hydroxyacetophenone; the chelating agent includes sodium gluconate.

In addition, the present invention provides a preparation method of the sunscreen, comprising the following steps:

(1) Grinding the phase B raw materials to a particle size of 30-60 meshes adds the phase A preliminarily heated and dissolved, and grinds and mixes evenly;

(2) Add phase C that is pre-stirred and activated to a gel state into the system after grinding and mixing in step (1), add phase D after homogenization, heat up and stir, and then add phase E aqueous solution in small amounts and multiple times, while adding edges Stir, after adding, homogenize and cool down;

(3) adding pre-dissolved phase F and phase G to the system after cooling in step (2), stirring evenly and then adding phase H, homogenizing and filtering to obtain sunscreen lotion;

The A phase is isoamyl p-methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate and phenyl benzimidazole sulfonic acid; the B phase is Diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate, C9-12 alkyl tocopheryl acetate, peony seed oil, titanium dioxide, silica, polyglycerol-3 diisostearate and Sorbitan isostearate; Described C phase is distearyldimethylammonium hectorite; Described D phase is VP/hexadecene copolymer; Described E phase is water, glycerol, butylene glycol , sodium chloride, p-hydroxyacetophenone and sodium gluconate; the F phase is water, peony fermentation broth, tetrahydromethylpyrimidine carboxylic acid, epigallocatecholgallate glucoside and carnosine; the G phase is arginine; the H phase is ethanol.

As a preferred embodiment of the preparation method of the present invention, the mass part of the water in the F phase in the sunscreen lotion is 1.8-2.2 mass parts.

As a preferred embodiment of the preparation method of the present invention, in the step (1), the temperature of the phase A that is heated and dissolved is 60-70°C, and in the step (2), the temperature of the temperature-raising and stirring is 70-80°C, The temperature after cooling is 40-45°C.

As a preferred embodiment of the preparation method of the present invention, in the step (2), the homogenization time added to the D phase after homogenization is 2-5 minutes, the homogenization speed is 600-800r/min, the homogenization, The homogenization of cooling is medium and high-speed homogenization for 3-5 minutes, wherein the homogenization speed is 800-1000r/min; in the step (3), the homogenization time is 0.5-1.5 minutes, and the homogenization speed is 400-600r/min min.

As a preferred embodiment of the preparation method of the present invention, in the step (3), the mesh number of the filter cloth to be filtered is 200 meshes.

Compared with the prior art, the beneficial effects of the present invention are:

First: the sunscreen provided by the present invention does not contain silicone oil, which can avoid the destructive effect of silicone oil on human skin and the environment;

Second: the sunscreen lotion provided by the present invention has a refreshing skin feeling, extremely low allergic reaction rate, can effectively inhibit oil secretion, reduce transepidermal water loss, and has a high SPF value;

Third: the preparation method of the sunscreen lotion provided by the present invention is simple and easy to operate.

Detailed ways

In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below with reference to specific embodiments.

Examples 1-7

Embodiment 1-7 provides a kind of sunscreen lotion, the composition of the sunscreen lotion is shown in Table 1, the mass parts of the components are filled in in Table 1, but the total mass parts of the overall formula is 100 parts, so in the table The balance of the formula means supplementing the formula to 100 parts; wherein the emulsifier is polyglycerol-3 diisostearate and sorbitan isostearate in a mass ratio of 2.5:1, and the thickener is distearate diisostearate. Methylammonium hectorite, the film-forming agent is VP/hexadecene copolymer, the humectant is a compound of glycerol and butanediol in a mass ratio of 1:1.5, and the chelating agent is sodium gluconate.

Table 1: Formulation table of the sunscreen lotions of Examples 1-7

Wherein, the preparation method of embodiment 1-7 is as follows:

(1) Grind the B-phase raw materials to a particle size of 30-60 mesh, add the A-phase pre-heated to 65°C to dissolve, and grind and mix evenly;

(2) adding the C phase that is stirred and activated into a gel state in advance to the system after the grinding and mixing in step (1), homogenizing for 3.5 minutes at a speed of 700 r/min, adding the D phase raw materials, warming up to 75 ℃ and stirring, Add the E-phase aqueous solution in a small amount and several times, and stir to emulsify evenly. After the addition is completed, homogenize for 4 minutes at a speed of 900 r/min. °C;

(3) Add pre-dissolved phase F and phase G to the system after cooling in step (2), stir evenly and then add phase H, and homogenize for 1 minute at a speed of 500 r/min. After each index is qualified, use 200 Filter with filter cloth to get sunscreen lotion;

The A phase is isoamyl p-methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate and phenyl benzimidazole sulfonic acid; the B phase is Diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate, C9-12 alkane, tocopheryl acetate, peony seed oil, titanium dioxide, silica, emulsifier; the C phase is thickening The D phase is a film-forming agent; the E phase is water, glycerol, butanediol, sodium chloride, p-hydroxyacetophenone and sodium gluconate; the F phase is water, peony fermentation broth, four Hydrogen methyl pyrimidine carboxylic acid, EGCG and carnosine; the G phase is arginine; the H phase is ethanol; wherein the water in the F phase is 2 parts by mass.

Comparative Examples 1-11

Comparative Example 1-11 of the present invention provides a sunscreen lotion, the composition of which is shown in Table 2, and the mass parts of the components are filled in in Table 2, but the total mass parts of the overall formula is 100 parts, so The balance in the table represents the supplementary formula to 100 parts; except for the silicone oil, the other components are completely the same as those in Examples 1-7, and the preparation method is also completely the same as that in Examples 1-7, except that the silicone oil is replaced with the corresponding The ester alkane mixture is part of Phase B.

Table 2: Formula table of sunscreen lotions of Comparative Examples 1-11

Effect example 1

The effect examples of the present invention explore the freshness of the sunscreen lotions obtained in Examples 1-7 and Comparative Examples 1-11;

Test method: recruit a total of 200 volunteers of different ages, wash their arms with clean water, absorb excess water with lint-free absorbent paper towels, and sit quietly at an ambient temperature of 20-22°C and a humidity of 40-60% For 5 minutes, take 0.5g of the test sample and apply it to the corresponding position on the arm, evaluate its skin feel, and calculate the percentage of the corresponding selected number of people. as shown in Table 3;

Table 3: The freshness test table of the sunscreen lotions obtained in Examples 1-7 and Comparative Examples 1-11

As can be seen from Table 3, when the technical solution of the present invention is used to obtain a sunscreen lotion with excellent freshness, the percentage of freshness is above 82%, and can even reach 99%. Compare the results of Examples 1-7 with Comparative Example 1 In comparison, it can be found that the ester alkane mixture of the present invention can effectively replace the effect of conventional silicone oil, and the percentage of refreshing degree is equivalent or even higher; it can be seen from Examples 1-4 that when the four components in the ester alkane mixture are used However, when the mass ratio in the sunscreen lotion is changed, the obtained freshness will also be different; it can be seen from Example 1 and Examples 5-6 that when the total amount of the ester alkane mixture is the same , the change of the mass ratio of the four components will also have an impact on the percentage of freshness. When the ratio is 2:2:2:3, the best percentage of freshness is obtained; it can be seen from Example 1 and Comparative Examples 1-8 that when one or several components in the ester alkane mixture are reduced and corresponding When replaced with silicone oil, the refreshing effect of the obtained products showed an obvious downward trend, and the decline range was between 17.17-60.61%; it can be seen from Example 1 and Comparative Example 9 that when the total mass of the ester-alkane mixture was not However, when the ratio of the ingredients in the ester alkane mixture is not within the range given by the present invention, the freshness of the obtained product also decreases significantly; as can be seen from Example 1 and Comparative Example 10, when the ester alkane is further increased When the amount of the mixture is added, it will not improve the refreshing degree of the product, but will make the refreshing feeling worse; it can be seen from Example 1 and Comparative Example 11 that when the ingredients in the ester alkane mixture are replaced with similar ingredients , cannot achieve a comparable effect.

Effect example 2

The effect example of the present invention adopts a patch test to explore the potential of the sunscreens obtained in Examples 1-7 and Comparative Examples 1-11 to cause adverse reactions to human skin;

1. Subject selection:

1) Select volunteers aged 18-60 who meet the test requirements as subjects

2) Those with the following conditions cannot be selected as subjects

(1) Those who have used antihistamines in the past week or immunosuppressants in the past month

(2) Those who have applied any anti-inflammatory drugs to the test site within the past two months

(3) Subjects suffering from inflammatory skin disease clinically unhealed

(4) Patients with insulin-dependent diabetes mellitus

(5) Patients with asthma or other chronic respiratory diseases who are receiving treatment

(6) Those who received anticancer chemotherapy within the past 6 months

(7) Patients with immunodeficiency or autoimmune disease

(8) Lactating or pregnant women

(9) Bilateral mastectomy and bilateral axillary lymph node resection

(10) Judges who affect the test results due to scars, pigments, atrophy, port-wine stains or other blemishes on the skin to be tested

(11) Participate in other clinical trial investigators

(12) People with highly sensitive constitution

2. Test method:

1) According to the subject selection criteria, select at least 30 people to participate in the trial;

2) Select qualified spot test equipment with an area of no more than 50mm ² and a depth of about 1mm. Put the test substance into the small chamber of the plaque tester, and the dosage is about 0.020g-0.025g (solid or semi-solid) or 0.020mL-0.025mL (liquid). The test substances are the products prepared in Examples 1-7 and Comparative Examples 1-11, and the control group is a blank control (without any substance). The patch tester with the test substance was applied to the subject's back or the curved side of the forearm with hypoallergenic tape, and lightly pressed with the palm of the hand to make it evenly applied to the skin for 24 hours.

3) 30min (after the indentation disappears), 24h and 48h after removing the test object spot tester, respectively, observe the skin reaction according to the standard in Table 4, and record the observation results.

Table 4: Skin occlusion patch test skin reaction grading standard

3. Test results:

Record patch test results shown in Table 5;

Table 5: Patch test results table (the total number of people in this test is 30)

As can be seen from Table 5, the sunscreen milk patch test results prepared by the technical solution of the present invention have no obvious irritation for 30 people. In the comparative example, the higher the content of silicone oil, the stronger the irritation, wherein pure silicone oil The patch test results of the system (Comparative Example 1) were the most serious, with 10 cases of 1 reaction grade and 4 cases of 2 reaction grade appearing at 0.5h; Further increasing the addition amount of the ester alkane mixture or replacing the components in the ester alkane mixture with other similar ingredients will bring some irritation to the product.

Effect example 3

The effect example of the present invention explores the oil-controlling ability of the sunscreen lotions obtained in Examples 1-7 and Comparative Examples 1-11; by measuring the transparency of the oil-absorbing tape after absorbing sebum, the amount of oil on the skin surface is measured; specific test method: select 190 oily or Combination skin volunteers, aged 20-35 years old, were randomly divided into 19 groups of 10 people. Each group applied different test samples, and one group was used as a blank control without applying any product. Volunteers first washed their foreheads with alkaline soap-based facial cleanser, rinsed with clean water, and then used lint-free absorbent paper towels to dry their foreheads, and then sat for 30 minutes at an ambient temperature of 20-22°C and a humidity of 40-60%. Can not drink water and beverages, keep it relaxed and do not touch the forehead, and then use the oil probe SM815 of the CK tester to test the oil secretion at different positions on the forehead, measure 3 times, take the average value as the initial value, take (2.0±0.1) The sample with the dosage of mg/m ³ is evenly smeared on the designated area of the forehead with a silicone fingertip. After smearing, sit still, measure the amount of sebum secretion for 1 hour and 6 hours respectively, and also measure 3 times at different positions, take the average value, and calculate The inhibition rate of oil secretion on the skin surface, and the test results were evaluated. CK tester oil probe SM815 is used to detect the skin oil content, the smaller the measurement value, the lower the skin oil content; the inhibition rate=[(after use-before use)/before use]*100%; the test results are shown in Table 6 Show;

Table 6: Test result table of oil control test

As can be seen from Table 6, the sunscreen obtained by the technical solution of the present invention has an effective oil control effect. At 1 hour, the inhibition rate of oil and fat is above 27.84%, and at 6 hours, the inhibition rate of oil and fat is 24.19% or more, that is, when the addition amount of the ester alkane mixture in the silicone-free oil system adopted by the present invention is extremely small (Example 4), the oil control effect equivalent to that of the silicone oil system in Comparative Example 1 can be achieved; It can be seen from the ratio 1 that when the addition amount of the ester alkane mixture is the same as that of the silicone oil, the oil control effect of the product obtained in Example 1 is significantly better than that of the product in Comparative Example 1. Compared with Comparative Example 1, the inhibition rate of 1 to oil is increased by 13.00% and 28.70% respectively. It can also be found from the data that the durability of the oil control effect of the present invention is better than that of the silicone oil system.

Effect example 4

The effect example of the present invention explores the skin barrier repairing effect of the sunscreen lotions obtained in Examples 1-7 and Comparative Examples 1-11. Volunteers use the test product for 28 days under normal conditions, and the CK instrument probe is used to analyze and measure the skin surface. The TEWL value of water loss is used to evaluate the skin barrier repairing effect of the test sample. The specific test method: select 30 volunteers, and wash off the skin on the arm with water under the environment of temperature 20-22 ℃ and humidity 40-60%. Grease and dust, sit still for 30 minutes, can not drink water and beverages, the volunteers are relaxed, the arms are bare, avoid touching the arms, before the test sample is used, use the CK test instrument probe in the measurement area on the smeared side and the blank control side of the sample Measure 3 times at different positions, take the average value as the initial value of the smeared side and the control side of the sample, denoted as D0, and then take the corresponding test sample and smear it in the designated area. After smearing for 28 days, measure 3 times at different positions in the measurement area on the smeared side of the sample and the blank control side, and take the average value as the measured value on the smeared side and the control side of the sample, denoted as D28, and compare the transepidermal water loss of each test group. TEWL value, calculate its change rate, change rate=[(after use-before use)/before use]*100%; the test results are shown in Table 7;

Table 7: Transdermal Water Loss Test Data Sheet

As can be seen from the experimental data in Table 7, the sunscreen obtained by using the technical solution of the present invention can significantly reduce the transdermal water loss, and the higher the silicone oil content in Comparative Examples 1-8, the worse the effect of reducing the transdermal water loss. , which fully shows that silicone oil is irritating to human skin.

Effect example 5

The effect examples of the present invention explore the SPF values of the sunscreen lotions obtained in Examples 1-7 and Comparative Examples 1-11; Irradiate with ultraviolet rays of different wavelengths, measure the absorbance value of the sample, and directly evaluate the sunscreen effect according to the size of the measured value; specific test method: use a fully automatic coating platform and applicator to repeatedly coat the sunscreen sample on a quartz sheet of precise thickness to obtain Multiple sunscreen sample coatings with good reproducibility and accurate film thickness. The contrast thickness of the coating film is 5 microns; the absorption curve of the coating film sample is measured with a UV-visible spectrophotometer, and the absorption value between 290 nm and 400 nm is recorded; the HPA skin beautifying lamp is used to simulate sunlight to illuminate the coating film sample, and the energy of the lamp source is 6.7 mW/square centimeter, the irradiation dose is equivalent to the sunlight irradiation for 1 hour at noon in summer at 31 degrees north latitude; after irradiation, use an ultraviolet-visible spectrophotometer to measure the absorption curve of the sample coating film, and substitute the measured value into the ISO2443 calculation formula , calculate the SPF value and PA value of the sample; the test results are shown in Table 8;

Table 8: Sunscreen ability test result table of sunscreen lotion

It can be found from Table 8 that the sunscreen lotion prepared by the technical solution of the present invention has excellent sunscreen performance, the SPF value is greater than 41.6, and the PA+++.

Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention rather than limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should The technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. The water-in-oil peony sun block free of silicone oil is characterized by comprising the following components in parts by mass: 18.02-23.2 parts of sun-screening agent, 1-2.2 parts of emulsifier, 0.01-0.45 part of thickening agent, 0.01-1 part of film-forming agent, 0.1-2 parts of silica, 20-80 parts of solvent and 0.04-22 parts of ester-alkane mixture;

the mixture of ester and alkyl is composed of diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkyl.

2. The suncare cream of claim 1, wherein the mass ratio of diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate, and C9-12 alkane is diethylhexyl carbonate: dioctyl carbonate: c12-15 alcohol benzoates: c9-12 ═ c.01-4: (0.01-6): (0.01-6): (0.01-6).

3. The sunscreen according to claim 2 wherein the mass ratio of diethylhexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate and C9-12 alkane is diethylhexyl carbonate: dioctyl carbonate: c12-15 alcohol benzoate: c9-12 alkyl ═ 1.8-2.2: (1.8-2.2): (1.8-2.2): (2.6-3.4).

4. The suncare milk of claim 1, further comprising the following components in parts by mass: 0.12 to 0.6 portion of antioxidant, 0.1 to 1.83 portions of skin conditioner, 0.1 to 0.5 portion of preservative and 0.01 to 0.05 portion of chelating agent.

5. The suntan emulsion of claim 1, wherein the sunscreens include plant sunscreens and non-plant sunscreens; the plant sunscreen agent comprises peony seed oil and peony fermentation liquor, and the non-plant sunscreen agent comprises at least one of titanium dioxide, isoamyl p-methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate and phenyl benzimidazole sulfonic acid.

6. The suntan lotion of claim 5, wherein the mass ratio of plant sunscreens to non-plant sunscreens is (0.02-1.2): (18-22).

7. The sun-block emulsion according to claim 1, wherein the emulsifier comprises at least one of polyglycerol emulsifier, span, tween, liquid crystal emulsifier; the thickener comprises disteardimonium hectorite; the film forming agent comprises at least one of VP/VA copolymer, acrylic acid (ester)/ethylhexyl acrylate copolymer, acrylic acid (ester)/dimethylaminoethyl methacrylate copolymer and polyamide-8; the solvent comprises at least one of water and ethanol.

8. The suncare milk of claim 4, wherein the antioxidant comprises at least one of tocopherol acetate, carnosine, and tetrahydromethylpyrimidine carboxylic acid; the skin conditioner comprises at least one of arginine, epigallocatechin gallate glucoside; the preservative comprises at least one of sodium chloride and p-hydroxyacetophenone; the chelating agent comprises at least one of EDTA-2Na, sodium citrate and sodium gluconate.

9. A process for the preparation of a sun-screen according to any of claims 1 to 8, comprising the steps of:

(1) grinding the raw material of the phase B until the granularity is 30-60 meshes, adding the phase A which is heated and dissolved in advance, grinding and mixing uniformly;

(2) adding a C phase which is stirred and activated into a gel state in advance into the system which is ground and uniformly mixed in the step (1), adding a D phase after homogenizing, heating and stirring, adding a small amount of E phase aqueous solution for multiple times while stirring, homogenizing and cooling after the addition is finished;

(3) adding the F phase and the G phase which are dissolved in advance into the system cooled in the step (2), uniformly stirring, then adding the H phase, homogenizing and filtering to obtain the sun-block emulsion;

the phase A is isoamyl p-methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate and phenylbenzimidazole sulfonic acid; the phase B is diethyl hexyl carbonate, dioctyl carbonate, C12-15 alcohol benzoate, C9-12 alkyl tocopheryl acetate, peony seed oil, titanium dioxide, silica, polyglycerol-3 diisostearate and sorbitan isostearate; the phase C is disteardimonium hectorite; the phase D is a VP/hexadecene copolymer; the phase E is water, glycerol, butanediol, sodium chloride, p-hydroxyacetophenone and sodium gluconate; the F phase is water, peony fermentation liquor, tetrahydro-methyl pyrimidine carboxylic acid, epigallocatechin gallate glucoside and carnosine; the G phase is arginine; the H phase is ethanol.

10. The method according to claim 9, wherein the temperature of the phase A dissolved by heating in the step (1) is 60 to 70 ℃, the temperature of the phase A dissolved by heating in the step (2) is 70 to 80 ℃, and the temperature after cooling is 40 to 45 ℃.