Clear sunscreen isolation gel and preparation method thereof

Abstract

The invention provides clear sunscreen isolation gel and a preparation method thereof. The gel comprises the following raw materials in parts by weight: 2-6 parts of an ultraviolet light absorber, 18-22 parts of a soothing agent, 10-20 parts of a whitening agent, 13-30 parts of a sweat-resistant factor and 5-8 parts of an emulsifier. The ultraviolet light absorbers comprise a long-wave ultraviolet light absorber, a medium-long-wave ultraviolet light absorber and a medium-wave ultraviolet light absorber according to the weight part ratio of (40-60): (20-30): 10, raw materials in different proportions are used in each stage, and the ultraviolet light absorber has good ultraviolet light absorption capacity, effectively absorbs UVA and UVB ultraviolet light, removes or reduces oxygen active group intermediate products and improves the service life of the ultraviolet light absorber. According to the present invention, the oxidation stress process generated by ultraviolet radiation is prevented, the skin barrier function is improved and repaired by using the soothing agent, the melanin production can be blocked by using the whitening agent, and the dark skin can be improved, the protection efficiency of the sunscreen product is effectively improved, the full-wave-band sunscreen effect is truly achieved, the sweat-resistant factor is added, the sweat secretion is inhibited, and the anti-aging effect is achieved; meanwhile, good adhesive force and water resistance are achieved, and the makeup durability is kept.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetics, and in particular to a clear sunscreen isolation gel and a preparation method thereof. Background Art

[0002] Solar radiation includes ultraviolet rays, visible light and infrared rays. Among them, ultraviolet rays are a type of sunlight with a shorter wavelength, ranging from 200-400nm. According to the different wavelengths, they can be divided into three segments: long-wave ultraviolet rays (ultraviolet A, UVA), medium-wave ultraviolet rays (ultravolet B, UVB) and short-wave ultraviolet rays (ultraviolet C, UVC). The components that reach the ground are about 95% UVA and about 5% UVB, while UVC is basically absorbed by the ozone layer and cannot reach the ground; medium-wave ultraviolet rays can penetrate the cortex and epidermis, causing most skin damage, and long-wave ultraviolet rays can penetrate the dermis, causing the dermis to produce melanin; erythema is the result of capillary dilation after the skin is irradiated with ultraviolet rays, and is generally considered to be a sign of ultraviolet damage to the skin, mainly caused by UVB. The minimum erythema dose (MED) is the most common method to describe the skin's sensitivity to ultraviolet rays. Regarding the damage mechanism, ultraviolet-induced epidermal erythema is a process of apoptosis of stratum corneum cells, which is related to DNA damage. Skin pigmentation is mainly caused by UVA, and can be divided into immediate pigmentation and delayed pigmentation according to its mechanism and mode. Ultraviolet radiation can induce high expression of proteinase-activated receptor-2, and promote its translocation and activation on the keratinocyte membrane, strengthen the phagocytosis of melanosomes by keratinocytes, and promote melanin transport. In addition, ultraviolet radiation will lead to an increase in reactive oxygen species in the skin, thereby promoting the synthesis, operation and apoptosis of melanin.

[0003] At present, the sunscreen products on the market are mainly divided into organic sunscreen products based on ultraviolet absorbers and inorganic sunscreen products based on ultraviolet shielding agents. Ultraviolet absorbers are a type of substance that can absorb ultraviolet rays and release the absorbed energy in the form of less destructive heat energy, thereby reducing the probability of active free radicals generated by photosensitive substances in the material absorbing ultraviolet rays, and thus can play a certain protective role on the material itself. At present, the common ultraviolet absorbers in China are mainly salicylates, benzophenones, benzotriazoles, triazines, etc., which use more chemical substances. The higher the sun protection index, the greater the dosage. When applied to the skin, an airtight oil film is formed, which hinders the normal breathing of the skin; and most sunscreens are mainly waterproof, and the anti-sweat effect is poor. If you sweat a lot, it is easy to get mottled. In order to improve the makeup holding ability, traditional film-forming agents are generally added. The ingredients are relatively brittle, and the formed film is easy to crack, which makes the skin feel tight and irritating to the skin, and does not fundamentally inhibit sweat secretion. Summary of the invention

[0004] In view of this, the present invention provides a clear sunscreen isolation gel and a preparation method thereof to solve the above problems.

[0005] The technical solution of the present invention is achieved as follows: a clear sunscreen gel: comprising the following raw materials in parts by weight: 2-6 parts of ultraviolet absorbers, 18-22 parts of soothing agents, 10-20 parts of whitening agents, 13-30 parts of sweat resistance factors, and 5-8 parts of emulsifiers; the ultraviolet absorbers are long-wave ultraviolet absorbers, medium-long-wave ultraviolet absorbers, and medium-wave ultraviolet absorbers in a weight ratio of (40-60):(20-30):10, and the long-wave ultraviolet absorbers are phycoerythrin and snail mucus extract in a mass ratio of (5-10):(1-3); the medium-long-wave ultraviolet absorbers are phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a mass ratio of (2-5):(3-8):(10-15), and the medium-wave ultraviolet absorbers are phycoerythrin, catechin, and snail mucus extract in a mass ratio of (3-5):(2-4):(5-10).

[0006] Furthermore, the clear sunscreen isolation gel comprises the following raw materials in parts by weight: 4 parts of ultraviolet absorbers, 20 parts of soothing agents, 15 parts of whitening agents, 25 parts of sweat resistance factors, and 7 parts of emulsifiers.

[0007] Furthermore, the soothing agent includes 8-10 parts of Centella asiatica extract, 2-4 parts of dipotassium glycyrrhizinate, and 1-3 parts of scutellaria baicalensis oil.

[0008] Furthermore, the whitening agent includes 12-15 parts of Polygonum cuspidatum root extract and 8-13 parts of Glycyrrhiza glabra root extract.

[0009] Furthermore, the sweat resistance factor includes aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of (3.2-8.9):(1.1-2.5):(0.2-0.9).

[0010] Furthermore, the emulsifier is one or a combination of potassium cetyl phosphate, dehydroglucoside, laureth-7, and polyglyceryl-3 methyl glucose distearate.

[0011] Furthermore, the extraction method of the snail mucus extract is specifically as follows: collect snail secretion fluid, put it into a high-speed centrifuge to break the mucus cells, take the supernatant, add 5-15 times its mass of water, homogenize and break it at a temperature of 75-85°C and 35-45Mpa for 1-3 times, centrifuge, take the supernatant, combine the supernatants and then ultrafilter, and retain a concentrated solution with a molecule of less than 2000Da.

[0012] Furthermore, a method for preparing a clear sunscreen gel comprises the following steps:

[0013] S1. According to the above formula, the ultraviolet absorber, soothing agent and whitening agent are put into a water phase pot and heated to 80-100° C. until they are dissolved to obtain a sunscreen slurry A;

[0014] S2. When the temperature of phase A drops below 40°C, add the sweat resistance factor and mix well, heat in a water bath at 65-95°C for 4-6h, and stir slowly to obtain sunscreen slurry B;

[0015] S3, slowly adding the emulsifier to the sunscreen slurry B, and mixing by ultrasound to obtain a sunscreen slurry C;

[0016] S4. Use the sunscreen slurry C to adjust the pH value to neutral, homogenize, and vacuum degas to obtain a sunscreen isolation condensate.

[0017] Furthermore, in S3, the ultrasonic power is 400-600 W, the frequency is 25-45 Hz, and the ultrasonic time is 60-120 min.

[0018] Furthermore, in S4, the homogenization speed is 10000-28000 rpm, the pressure is 60-100 MPa, the homogenization temperature is 60-80° C., and the homogenization time is 15-35 min.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention adopts ultraviolet absorbers in a specific proportion to reduce the damage of ultraviolet rays UVA and UVB to the skin, uses soothing agents to improve and repair the skin's own barrier function, strengthens the skin, and has resistance to ultraviolet rays. It can repair the skin after sun exposure, reduce skin irritation, resist allergies and soothe, decompose bacterial growth in sweat, and eliminate skin inflammation; the whitening agent can block the production of melanin, improve skin dullness, remove yellowness and brighten, prevent the pigmentation of erythema caused by sun exposure, improve the protection efficiency of sunscreen products, and truly achieve full-band sun protection.

[0021] Ultraviolet absorbers are set according to the ratio of long wave, medium-long wave and medium wave, and different proportions of raw materials are used in each stage. Among them, phycoerythrin has good ultraviolet absorption ability and effectively absorbs UVA and UVB ultraviolet rays to help protect the skin from damage caused by ultraviolet radiation. Snail mucus extract can prevent the oxidative stress process caused by ultraviolet radiation by removing or reducing the intermediate products of oxygen active groups, thereby blocking or slowing down tissue damage or promoting post-sun repair, and playing an indirect sun protection role.

[0022] By adding anti-sweat factors and through the mutual compatibility of various raw materials, it can effectively penetrate into the walls of apocrine sweat gland cells and adhere to the walls of apocrine sweat gland cells, kill harmful bacteria in the apocrine sweat glands and regulate the secretion function of the apocrine sweat glands, avoid the reproduction of harmful bacteria and the decomposition of secreted sweat into fatty acids and fatty alcohols by harmful bacteria, dissolve existing fatty acids and fatty alcohols, thereby inhibiting sweat secretion. At the same time, it has good adhesion and water resistance, which can help makeup stay on the skin surface for a longer time. DETAILED DESCRIPTION

[0023] In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

[0024] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0025] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial sources.

[0026] Example 1

[0027] A clear sunscreen gel: comprising the following raw materials in parts by weight: 2 parts of ultraviolet absorber, 18 parts of soothing agent, 10 parts of whitening agent, 13 parts of sweat resistance factor, and 5 parts of emulsifier;

[0028] The ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 40:20:10, and the long-wave ultraviolet absorber is phycoerythrin and snail mucus extract in a weight ratio of 5:1; the medium-long-wave ultraviolet absorber is phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a weight ratio of 2:3:10, and the medium-wave ultraviolet absorber is phycoerythrin, catechin aldehyde, and snail mucus extract in a weight ratio of 3:2:5;

[0029] The snail mucus extract is specifically extracted by collecting snail secretion liquid, placing it in a high-speed centrifuge to break the mucus cells, taking the supernatant, adding water 5 times its mass, homogenizing and breaking the extract at a temperature of 75°C and 35Mpa for one time, centrifuging, taking the supernatant, combining the supernatants and then ultrafiltration, and retaining a concentrated solution with a molecule of less than 2000Da;

[0030] The soothing agent includes 8 parts of Centella asiatica extract, 2 parts of dipotassium glycyrrhizinate, and 1 part of scutellaria baicalensis oil;

[0031] The whitening agent comprises 12 parts of Polygonum cuspidatum root extract and 8 parts of Glycyrrhiza glabra root extract;

[0032] The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of 3.2:1.1:0.2;

[0033] The emulsifier is potassium cetyl phosphate.

[0034] Example 2

[0035] A clear sunscreen gel: comprising the following raw materials in parts by weight: 6 parts of ultraviolet absorber, 22 parts of soothing agent, 20 parts of whitening agent, 30 parts of sweat resistance factor, and 8 parts of emulsifier;

[0036] The ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 60:30:10, and the long-wave ultraviolet absorber is phycoerythrin and snail mucus extract in a mass ratio of 10:3; the medium-long-wave ultraviolet absorber is phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a mass ratio of 5:8:15, and the medium-wave ultraviolet absorber is phycoerythrin, catechin aldehyde, and snail mucus extract in a mass ratio of 5:4:10;

[0037] The snail mucus extract is specifically extracted by collecting snail secretion liquid, placing it in a high-speed centrifuge to break the mucus cells, taking the supernatant, adding water 15 times its mass, homogenizing and breaking the extract at a temperature of 85° C. and 45 MPa for 3 times, centrifuging, taking the supernatant, combining the supernatants and then ultrafiltration, and retaining a concentrated solution with a molecule of less than 2000 Da;

[0038] The soothing agent includes 10 parts of Centella asiatica extract, 4 parts of dipotassium glycyrrhizinate, and 3 parts of scutellaria baicalensis oil;

[0039] The whitening agent comprises 15 parts of Polygonum cuspidatum root extract and 13 parts of Glycyrrhiza glabra root extract;

[0040] The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of 8.9:2.5:0.9;

[0041] The emulsifier is decidyl glucoside.

[0042] Example 3

[0043] A clear sunscreen gel: comprising the following raw materials in parts by weight: 4 parts of ultraviolet absorber, 20 parts of soothing agent, 15 parts of whitening agent, 25 parts of sweat resistance factor, and 7 parts of emulsifier;

[0044] The ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 50:25:10; the long-wave ultraviolet absorber is phycoerythrin and snail mucus extract in a weight ratio of 8:2; the medium-long-wave ultraviolet absorber is phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a weight ratio of 3:5:12; the medium-wave ultraviolet absorber is phycoerythrin, catechin aldehyde, and snail mucus extract in a weight ratio of 4:3:8;

[0045] The snail mucus extract is specifically extracted by collecting snail secretion liquid, placing it in a high-speed centrifuge to break the mucus cells, taking the supernatant, adding water 10 times its mass, homogenizing and breaking the extract at a temperature of 80° C. and 40 MPa for 2 times, centrifuging, taking the supernatant, combining the supernatants and then ultrafiltration, and retaining a concentrated solution with a molecule of less than 2000 Da;

[0046] The soothing agent includes 9 parts of Centella asiatica extract, 3 parts of dipotassium glycyrrhizinate, and 2 parts of scutellaria baicalensis oil;

[0047] The whitening agent comprises 14 parts of Polygonum cuspidatum root extract and 11 parts of Glycyrrhiza glabra root extract;

[0048] The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of 6.2:1.7:0.7;

[0049] The emulsifier is potassium cetyl phosphate and dehydrogenated glucoside in a mass ratio of 1:2;

[0050] The above-mentioned embodiments 1-3 are prepared by the following preparation method:

[0051] S1. According to the above formula, the ultraviolet absorber, soothing agent and whitening agent are put into a water phase pot and heated to 80-100° C. until they are dissolved to obtain a sunscreen slurry A;

[0052] S2. When the temperature of phase A drops below 40°C, add the sweat resistance factor and mix well, heat in a water bath at 75°C for 5 hours, and stir slowly to obtain sunscreen slurry B;

[0053] S3, slowly adding the emulsifier to the sunscreen slurry B, using ultrasound to mix, the ultrasound power is 500W, the frequency is 35Hz, and the ultrasound time is 90min, to obtain a sunscreen slurry C;

[0054] S4. Use sunscreen slurry C to adjust the pH value to neutral, homogenize for 25 min at a rotation speed of 14000 rpm, a pressure of 80 MPa, and a temperature of 70° C., and vacuum degassing to obtain a sunscreen isolation condensate.

[0055] Example 4

[0056] A clear sunscreen gel: comprising the following raw materials in parts by weight: 4 parts of ultraviolet absorber, 20 parts of soothing agent, 15 parts of whitening agent, 25 parts of sweat resistance factor, and 7 parts of emulsifier;

[0057] The ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 50:25:10; the long-wave ultraviolet absorber is phycoerythrin and snail mucus extract in a weight ratio of 8:2; the medium-long-wave ultraviolet absorber is phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a weight ratio of 3:5:12; the medium-wave ultraviolet absorber is phycoerythrin, catechin aldehyde, and snail mucus extract in a weight ratio of 4:3:8;

[0058] The snail mucus extract is specifically extracted by collecting snail secretion liquid, placing it in a high-speed centrifuge to break the mucus cells, taking the supernatant, adding water 10 times its mass, homogenizing and breaking the extract at a temperature of 80° C. and 40 MPa for 2 times, centrifuging, taking the supernatant, combining the supernatants and then ultrafiltration, and retaining a concentrated solution with a molecule of less than 2000 Da;

[0059] The soothing agent includes 9 parts of Centella asiatica extract, 3 parts of dipotassium glycyrrhizinate, and 2 parts of scutellaria baicalensis oil;

[0060] The whitening agent comprises 14 parts of Polygonum cuspidatum root extract and 11 parts of Glycyrrhiza glabra root extract;

[0061] The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of 6.2:1.7:0.7;

[0062] The emulsifier is potassium cetyl phosphate and dehydrogenated glucoside in a mass ratio of 1:2;

[0063] The above condensate is prepared by the following preparation method:

[0064] S1. According to the above formula, ultraviolet absorber, soothing agent and whitening agent are put into a water phase pot and heated to 80°C until dissolved to obtain sunscreen slurry A;

[0065] S2. When the temperature of phase A drops below 40°C, add the sweat resistance factor and mix well, heat in a water bath at 65°C for 4 hours, and stir slowly to obtain sunscreen slurry B;

[0066] S3, slowly adding the emulsifier to the sunscreen slurry B, using ultrasound to mix, the ultrasound power is 400W, the frequency is 25Hz, and the ultrasound time is 60min, to obtain a sunscreen slurry C;

[0067] S4. Use sunscreen slurry C to adjust the pH value to neutral, homogenize for 15 min at a rotation speed of 10000 rpm, a pressure of 60 MPa, and a temperature of 60° C., and vacuum degassing to obtain a sunscreen isolation condensate.

[0068] Example 5

[0069] A clear sunscreen gel: comprising the following raw materials in parts by weight: 4 parts of ultraviolet absorber, 20 parts of soothing agent, 15 parts of whitening agent, 25 parts of sweat resistance factor, and 7 parts of emulsifier;

[0070] The ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 50:25:10; the long-wave ultraviolet absorber is phycoerythrin and snail mucus extract in a weight ratio of 8:2; the medium-long-wave ultraviolet absorber is phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a weight ratio of 3:5:12; the medium-wave ultraviolet absorber is phycoerythrin, catechin aldehyde, and snail mucus extract in a weight ratio of 4:3:8;

[0071] The snail mucus extract is specifically extracted by collecting snail secretion liquid, placing it in a high-speed centrifuge to break the mucus cells, taking the supernatant, adding water 10 times its mass, homogenizing and breaking the extract at a temperature of 80° C. and 40 MPa for 2 times, centrifuging, taking the supernatant, combining the supernatants and then ultrafiltration, and retaining a concentrated solution with a molecule of less than 2000 Da;

[0072] The soothing agent includes 9 parts of Centella asiatica extract, 3 parts of dipotassium glycyrrhizinate, and 2 parts of scutellaria baicalensis oil;

[0073] The whitening agent comprises 14 parts of Polygonum cuspidatum root extract and 11 parts of Glycyrrhiza glabra root extract;

[0074] The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether, and isopropyl palmitate in a mass ratio of 6.2:1.7:0.7;

[0075] The emulsifier is potassium cetyl phosphate and dehydrogenated glucoside in a mass ratio of 1:2;

[0076] The above condensate is prepared by the following preparation method:

[0077] S1. According to the above formula, the ultraviolet absorber, soothing agent and whitening agent are put into a water phase pot and heated to 100° C. to obtain a sunscreen slurry A after dissolving;

[0078] S2. When the temperature of phase A drops below 40°C, add the sweat resistance factor and mix well, heat in a 95°C water bath for 6 hours while stirring slowly to obtain a sunscreen slurry B;

[0079] S3, slowly adding the emulsifier to the sunscreen slurry B, using ultrasound to mix, the ultrasound power is 600W, the frequency is 45Hz, and the ultrasound time is 120min, to obtain a sunscreen slurry C;

[0080] S4. Use sunscreen slurry C to adjust the pH value to neutral, homogenize at a speed of 28000 rpm, a pressure of 100 MPa, and a temperature of 80° C. for 35 min, and vacuum degassing to obtain a sunscreen isolation condensate.

[0081] Comparative Example 1

[0082] The difference between this comparative example and Example 3 is that the clear sunscreen isolation gel comprises the following raw materials in parts by weight: 1 part of ultraviolet absorber, 10 parts of soothing agent, 25 parts of whitening agent, 10 parts of sweat resistance factor, and 2 parts of emulsifier.

[0083] Comparative Example 2

[0084] The difference between this comparative example and Example 3 is that the ultraviolet absorber is a long-wave ultraviolet absorber, a medium-long-wave ultraviolet absorber, and a medium-wave ultraviolet absorber in a weight ratio of 1:1:1.

[0085] Comparative Example 3

[0086] The difference between this comparative example and Example 3 is that the ultraviolet absorber does not contain snail mucus extract.

[0087] Test Example 1 - Sun Protection Index Analysis

[0088] 20 mg of Examples 1-5 and Comparative Examples 1-3 and commercially available sunscreen gel were evenly distributed on a PMMA plate, and a glass rod was used to evenly coat the entire PMMA plate. The plate was placed in a dark room temperature environment, and irradiated with a xenon arc lamp of a daylight simulator for 30 minutes. The plate was tested according to the specific requirements of the Cosmetic Safety Technical Specifications, and its SPF value and PA value were calculated using a BASF SPF simulator.

[0089] PFA should be converted to PA according to the following formula, represented by +:

[0090] PFA value 2-3︱PA+

[0091] PFA value 4-7︱PA++

[0092] PFA value 8-15︱PA+++

[0093] PFA value greater than 16︱PA++++

[0094] The more plus signs there are after PA, the stronger its protection against UVA.

[0095] The results are as follows:

[0096]

[0097] From the above results, it can be seen that the sunscreen gel of the present invention has a better sunscreen effect, wherein the SPF value is greater than 50, reaching the national highest standard SPF50+, the PA value is greater than 16, and the sunscreen level reaches the mark PA++++. Compared with comparative examples 1 and 2, the present invention uses different ultraviolet absorbers in combination, and adds soothing and whitening ingredients. Under a specific ratio, the sunscreen gel has a relatively excellent ability to absorb ultraviolet light in the UVA and UVB segments; compared with comparative example 3, the present invention adds snail mucus extract to the sunscreen, and adds biological sunscreen on the basis of chemical sunscreens, extracting active substances from snail mucus, and its active substances can block or slow down tissue damage by removing or reducing oxygen active group intermediates, thereby playing an indirect sunscreen role.

[0098] Test Example 2 - Sweat-proof Test

[0099] Comparative Example 4

[0100] The difference between this comparative example and Example 3 is that the raw material of the clear sunscreen isolation gel does not contain sweat resistance factor.

[0101] Twenty volunteers were selected, aged 20-30 years old, with a male-female ratio of 3:1, and divided into two groups, 10 in each group, corresponding to Example 3 and Comparative Example 4, respectively. The measurement area was marked on the inside of the left and right arms of the subjects. The experimental area was 3.5*3.5cm, and 3 mg / m 2 Apply the gel evenly, keep it at 32℃ for 30min, then prepare simulated sweat to flow and flush the test area, observe the attachment state of natural sweat beads, and then observe whether it is washed off.

[0102]

[0103] From the sweat resistance test results, it can be seen that the sunscreen gel of the present invention has added sweat resistance factors, which can inhibit the secretion of sweat and has obvious waterproof and sweat resistance effects.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A clear sunscreen gel, characterized by: The invention comprises the following raw materials in parts by weight: 2-6 parts of ultraviolet absorbers, 18-22 parts of soothing agents, 10-20 parts of whitening agents, 13-30 parts of anti-sweat factors, and 5-8 parts of emulsifiers; the ultraviolet absorbers are long-wave ultraviolet absorbers, medium-long-wave ultraviolet absorbers, and medium-wave ultraviolet absorbers in a weight ratio of (40-60):(20-30):10; the long-wave ultraviolet absorbers are phycoerythrin and snail mucus extract in a mass ratio of (5-10):(1-3); the medium-long-wave ultraviolet absorbers are phycoerythrin, snail mucus extract, and ethylhexyl methoxycinnamate in a mass ratio of (2-5):(3-8):(10-15); and the medium-wave ultraviolet absorbers are phycoerythrin, catechin aldehyde, and snail mucus extract in a mass ratio of (3-5):(2-4):(5-10).

2. A clear sunscreen gel as claimed in claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 4 parts of ultraviolet absorber, 20 parts of soothing agent, 15 parts of whitening agent, 25 parts of anti-sweat factor and 7 parts of emulsifier.

3. The clear sunscreen gel according to claim 1, characterized in that: The soothing agent comprises 8-10 parts of Centella asiatica extract, 2-4 parts of dipotassium glycyrrhizinate, and 1-3 parts of sphenanthera chinensis oil.

4. The clear sunscreen gel according to claim 1, characterized in that: The whitening agent comprises 12-15 parts of Polygonum cuspidatum root extract and 8-13 parts of Glycyrrhiza glabra root extract.

5. The clear sunscreen gel according to claim 1, characterized in that: The sweat-resistant factor comprises aluminum chlorohydrate, stearyl alcohol polyether and isopropyl palmitate in a mass ratio of (3.2-8.9):(1.1-2.5):(0.2-0.9).

6. The clear sunscreen gel according to claim 1, characterized in that: The emulsifier is one or a combination of potassium cetyl phosphate, dehydroglucoside, laureth-7, and polyglyceryl-3 methyl glucose distearate.

7. The clear sunscreen gel according to claim 1, characterized in that: The snail mucus extract is specifically extracted as follows: snail secretion liquid is collected, placed in a high-speed centrifuge to break the mucus cells, the supernatant is taken, 5-15 times of its mass of water is added, the supernatant is homogenized and broken for extraction at a temperature of 75-85°C and 35-45Mpa for 1-3 times, centrifuged, the supernatant is taken, the supernatant is combined and then ultrafiltered, and the retained molecule is a concentrated liquid of less than 2000Da.

8. The method for preparing a clear sunscreen gel according to claim 1, characterized in that: The following steps are involved: S1. According to the above formula, the ultraviolet absorber, soothing agent and whitening agent are put into a water phase pot and heated to 80-100° C. until they are dissolved to obtain a sunscreen slurry A; S2. When the temperature of phase A drops below 40°C, add the sweat resistance factor and mix well, heat in a water bath at 65-95°C for 4-6h, and stir slowly to obtain sunscreen slurry B; S3, slowly adding the emulsifier to the sunscreen slurry B, and mixing by ultrasound to obtain a sunscreen slurry C; S4. Use the sunscreen slurry C to adjust the pH value to neutral, homogenize, and vacuum degas to obtain a sunscreen isolation condensate.

9. The method for preparing a clear sunscreen gel according to claim 8, characterized in that: In the S3, the ultrasonic power is 400-600W, the frequency is 25-45Hz, and the ultrasonic time is 60-120min.

10. The method for preparing a clear sunscreen gel according to claim 8, characterized in that: In the S4, the homogenizing speed is 10000-28000 rpm, the pressure is 60-100 MPa, the homogenizing temperature is 60-80° C., and the homogenizing time is 15-35 min.

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