Sunscreen composition as well as preparation method and application thereof

Abstract

The invention relates to a sunscreen composition as well as a preparation method and application thereof. The sunscreen composition comprises a coco-glucoside-coconut oil alcohol compound, polyethylene glycol stearate, dextrin palmitate, butyl octanol salicylate and titanium dioxide. The dextrin palmitate, the butyl octanol salicylate and the coco-glucoside-coconut oil alcohol compound in the composition are matched with one another, so that the composition has excellent wetting, dispersing and suspending effects on the titanium dioxide powder, the sunscreen performance of the composition is greatly improved, and the composition has a synergistic effect in the aspects of improving the stability of the composition and improving the sunscreen effect. Meanwhile, the coco-glucoside-coconut oil alcohol compound can be compatible with polyethylene glycol stearate, so that a sunscreen product further prepared from the composition does not need to be removed by a cleaning product, and the sunscreen product can be washed with clear water.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and specifically relates to a sunscreen composition and a preparation method and application thereof. Background Art

[0002] Ultraviolet rays (UV) in sunlight are the most significant and cumulative factor in skin aging. UV damage to the skin can lead to sunburn, skin aging, and increased risk of skin cancer. "Photodamage" accumulated over the years may prematurely disrupt the synthesis / degradation balance of collagen, elastin, etc., resulting in "photoaging." What is more noteworthy is that the accumulation of sunlight over time can also induce skin cancer. Photodamage is caused by accumulation from infancy, not in adulthood. In order to protect the skin of adults, especially children, from photodamage, a series of measures need to be taken, such as the use of sunscreen products.

[0003] Although sunscreen products can protect the skin from UV damage, they also have certain disadvantages. Sunscreen products need to add sunscreen to provide a sun protection index. Chemical sunscreens have certain irritation to the skin, while physical sunscreens are milder. Therefore, sunscreen products on the market are mainly physical sunscreens. However, although pure physical sunscreen is safe, it is limited by stability and other issues. Most physical sunscreens on the market use oil-in-water formulations, but this formulation is prone to poor spreadability, is not easy to clean, and is prone to acne. In existing water-in-oil physical sunscreens, in order to meet the sun protection index requirements, they generally contain more powders with ultraviolet scattering functions. In order to enhance stability, a large amount of dispersants and surfactants are often added, which can easily lead to a heavy skin feel and severe whitening.

[0004] CN115024994A discloses a high-safety sunscreen composition, including diethylhexyl butyramido triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, polysilicone-15, ethylhexyl triazone, zinc oxide / triethoxyoctylsilane, titanium dioxide / triethoxyoctylsilane, caprylic / capric triglyceride, isopropyl palmitate, C12-15 alcohol benzoate, trimethylsiloxysilicate. The composition is safe and non-toxic, and can perform photothermal conversion of absorbed ultraviolet rays while scattering ultraviolet rays, has good light stability, and can reduce the sticky feeling of use. However, the sunscreen composition cannot be washed with clean water while improving stability.

[0005] Therefore, how to provide a sunscreen composition with a high sun protection index, good stability, washability and high freshness has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a sunscreen composition and its preparation method and application. The components in the sunscreen composition cooperate with each other and synergize to enhance the effect, thereby greatly improving the water washability, stability, film-forming property, spreadability, and refreshing and smooth feeling when used while ensuring the sunscreen effect.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a sunscreen composition, comprising a coconut glucoside-coconut alcohol complex, polyethylene glycol stearate, dextrin palmitate, butyloctanol salicylate and titanium dioxide.

[0009] Titanium dioxide is a physical sunscreen that can protect the skin by reflecting and scattering ultraviolet rays. Coco-glucoside is a mild natural surfactant with good cleaning and emulsifying effects and low irritation to the skin; Coco-glucoside is a fatty alcohol extracted from coconut oil, which has moisturizing and hydrating effects; polyethylene glycol stearate is a non-ionic surfactant that can mix water and oil and maintain the stability of the emulsion, providing moisturizing and softening effects; dextrin palmitate is a fatty acid ester extracted from palm oil, which can be used as an oily thickener, can form a network gel structure, play the role of oil viscosity increase, and has low irritation to the body; butyl octanol salicylate is an ester compound, which feels refreshing and non-greasy on the skin, and is an excellent carrier and dispersant for inorganic sunscreens.

[0010] The present invention creatively finds that dextrin palmitate, butyl octanol salicylate and coconut glucoside-cocoyl alcohol complex in the composition cooperate with each other to have excellent wetting, dispersing and suspending effects on titanium dioxide powder, greatly improving the sunscreen performance of the composition, and having a synergistic effect in improving the stability of the composition and enhancing the sunscreen efficacies.

[0011] At the same time, the coconut glucoside-coconut alcohol complex can also be compatible with polyethylene glycol stearate, so that the sunscreen product made from the combination does not need to be removed by cleaning products and can be washed with clean water.

[0012] Preferably, the sunscreen composition further comprises polyhydroxystearic acid and caprylyl polymethicone.

[0013] Polyhydroxystearic acid is commonly used as an emulsifier and stabilizer, which can help improve the texture and stability of the product and enhance its skin feel; caprylyl polymethicone is an organic silicon compound with good lubricity and breathability, which can make the skin feel smooth and help improve the spreadability and durability of the product in cosmetics.

[0014] In the present invention, polyhydroxystearic acid, octyl polymethicone, dextrin palmitate and polyethylene glycol stearate cooperate with each other to further improve the spreadability and film-forming properties of the composition, while further enhancing the smoothness, moisture and freshness during use, without leaving obvious white marks on the skin, thereby increasing the comfort of use.

[0015] Preferably, the sunscreen composition comprises, by weight, 0.1 to 2 parts of coconut glucoside-coco alcohol complex, 0.1 to 1 part of polyethylene glycol stearate, 0.1 to 1 part of dextrin palmitate, 1 to 10 parts of butyloctanol salicylate, 0.1 to 1 part of polyhydroxystearic acid, 0.1 to 10 parts of caprylyl polymethicone, and 2 to 15 parts of titanium dioxide.

[0016] Among them, the specific point values ​​in 0.1~2 parts can be selected from 0.1 parts, 0.3 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, etc., the specific point values ​​in 0.1~1 parts can be selected from 0.1 parts, 0.3 parts, 0.5 parts, 0.7 parts, 1 parts, etc., the specific point values ​​in 1~10 parts can be selected from 1 part, 3 parts, 5 parts, 7 parts, 10 parts, etc., the specific point values ​​in 0.1~10 parts can be selected from 0.1 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc., and the specific point values ​​in 2~15 parts can be selected from 2 parts, 5 parts, 8 parts, 11 parts, 13 parts, 15 parts, etc.

[0017] Based on the synergistic effects of the components in the composition in terms of sun protection enhancement, stability, water washability, spreadability, etc., when the components in the composition are compounded according to the above-mentioned weight proportions, the overall performance of the composition can be further improved.

[0018] Preferably, in the coconut glucoside-coconut alcohol complex, the mass ratio of coconut glucoside to coconut alcohol is (1-10):(1-10).

[0019] Among them, the specific point values ​​from 1 to 10 can be selected from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, etc.

[0020] Preferably, the number of repeating units of ethylene oxide in the polyethylene glycol stearate is 20-120.

[0021] Among them, the specific point values ​​between 20 and 120 can be selected from 20, 40, 60, 80, 100, 120, etc.

[0022] In a second aspect, the present invention provides a method for preparing the sunscreen composition according to the first aspect, the preparation method comprising the following steps:

[0023] (1) mixing and dissolving coco-glucoside-coco alcohol complex, polyethylene glycol stearate, dextrin palmitate, butyloctanol salicylate and optional octyl polymethylsiloxane to obtain a mixture;

[0024] (2) The mixture obtained in step (1) is mixed with titanium dioxide and optionally polyhydroxystearic acid, and homogenized to obtain a sunscreen composition.

[0025] Preferably, the mixing temperature in step (1) is 60 to 95° C., and the mixing time is 2 to 30 minutes.

[0026] Preferably, the mixing temperature in step (2) is 60 to 95° C., and the mixing time is 2 to 30 minutes.

[0027] Among them, the specific point values ​​in 60-95°C can be selected from 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, etc., and the specific point values ​​in 2-30min can be selected from 2min, 5min, 10min, 15min, 20min, 25min, 30min, etc.

[0028] In a third aspect, the present invention provides a sunscreen, comprising the sunscreen composition as described in the first aspect, a moisturizer, an emulsifier, a thickener, an antioxidant and water.

[0029] Preferably, the humectant comprises butylene glycol, 1,2-pentanediol, and 1,2-hexanediol.

[0030] Preferably, the emulsifier comprises cetearyl alcohol.

[0031] Preferably, the thickener comprises xanthan gum and ammonium acryloyldimethyltaurate / VP copolymer.

[0032] Preferably, the antioxidant comprises p-hydroxyacetophenone.

[0033] Preferably, the sunscreen comprises, by weight, 5 to 30 parts of the sunscreen composition as described in the first aspect, 1 to 10 parts of a moisturizer, 0.5 to 3 parts of an emulsifier, 0.05 to 1 part of a thickener, 0.3 to 0.6 parts of an antioxidant and 40 to 80 parts of water.

[0034] Among them, the specific point values ​​in 5 to 30 portions can be selected from 5, 10, 15, 20, 25, 30, etc., the specific point values ​​in 1 to 10 portions can be selected from 1, 3, 5, 7, 10, etc., the specific point values ​​in 0.5 to 3 portions can be selected from 0.5, 1, 2, 3, etc., the specific point values ​​in 0.05 to 1 portion can be selected from 0.05, 0.1, 0.3, 0.6, 1, etc., the specific point values ​​in 0.3 to 0.6 portions can be selected from 0.3, 0.4, 0.5, 0.6, etc., and the specific point values ​​in 40 to 80 portions can be selected from 40, 50, 60, 70, 80, etc.

[0035] In a fourth aspect, the present invention provides a method for preparing the sunscreen according to the third aspect, the preparation method comprising the following steps:

[0036] (1) mixing and dissolving the sunscreen composition and the emulsifier to obtain phase A; mixing the thickener, water and an optional moisturizer to obtain phase B; and mixing the antioxidant and the optional moisturizer to obtain phase C;

[0037] (2) adding phase A to phase B under stirring and homogenizing to obtain a homogeneous product;

[0038] (3) Mix phase C with the homogenized product to obtain a sunscreen product.

[0039] Preferably, the mixing temperature before obtaining phase A in step (1) is 70-90° C., and the mixing time is 2-30 min.

[0040] Preferably, the mixing temperature before obtaining phase B in step (1) is 70-90° C., and the mixing time is 2-30 min.

[0041] Preferably, the mixing temperature before obtaining phase C in step (1) is 40-70° C., and the mixing time is 2-30 min.

[0042] Preferably, the stirring speed in step (2) is 2000-3000 rpm, the stirring temperature is 20-50° C., and the stirring time is 2-30 min.

[0043] Preferably, the mixing temperature in step (3) is 20 to 50° C., and the mixing time is 2 to 30 minutes.

[0044] Among them, the specific point values ​​in 70-90℃ can be selected from 70℃, 75℃, 80℃, 85℃, 90℃, etc., the specific point values ​​in 40-70℃ can be selected from 40℃, 45℃, 50℃, 55℃, 60℃, 65℃, 70℃, etc., the specific point values ​​in 20-50℃ can be selected from 20℃, 25℃, 30℃, 35℃, 40℃, 45℃, 50℃, etc., the specific point values ​​in 2-30min can be selected from 2min, 5min, 10min, 15min, 20min, 25min, 30min, etc., the specific point values ​​in 2000-3000rpm can be selected from 2000rpm, 2200rpm, 2400rpm, 2600rpm, 2800rpm, 3000rpm, etc.

[0045] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The present invention creatively finds that dextrin palmitate, butyl octanol salicylate and coconut glucoside-coco alcohol complex in the composition cooperate with each other to have excellent wetting, dispersing and suspending effects on titanium dioxide powder, greatly improving the sunscreen performance of the composition, and having a synergistic effect in improving the stability of the composition and sunscreen synergy. At the same time, the coconut glucoside-coco alcohol complex can also be compatible with polyethylene glycol stearate, so that the sunscreen product further made from the composition does not need to be removed by cleaning products and can be washed with clean water.

[0048] Furthermore, polyhydroxystearic acid, octyl polymethicone, dextrin palmitate and polyethylene glycol stearate cooperate with each other to synergistically improve the spreadability and film-forming properties of the compound, while further enhancing the smoothness, moisture and freshness during use, without leaving obvious white marks on the skin, thereby increasing the comfort of use. DETAILED DESCRIPTION

[0049] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0050] The sources of the components / raw materials in the following embodiments are shown in Table 1.

[0051] Table 1

[0052]

[0053] Example 1

[0054] The present embodiment provides a sunscreen composition, which includes, by weight: 1 part of coconut glucoside-coconut alcohol complex, 0.5 part of PEG-100 stearate, 0.2 part of dextrin palmitate, 8 parts of butyloctanol salicylate, 0.2 part of polyhydroxystearic acid, 5 parts of caprylyl polymethicone, and 7 parts of titanium dioxide.

[0055] Preparation method:

[0056] Coco-glucoside-coco alcohol complex, PEG-100 stearate, dextrin palmitate, butyloctanol salicylate and octyl polymethicone were mixed at 85° C. for 15 minutes to dissolve, then mixed with titanium dioxide and polyhydroxystearic acid at 85° C. for 15 minutes to dissolve, and evenly dispersed by a homogenizer to obtain a sunscreen composition.

[0057] Example 2

[0058] The present embodiment provides a sunscreen composition, which includes, by weight: 1.7 parts of coconut glucoside-coconut alcohol complex, 0.8 parts of PEG-100 stearate, 0.5 parts of dextrin palmitate, 5 parts of butyloctanol salicylate, 0.5 parts of polyhydroxystearic acid, 3 parts of caprylyl polymethicone, and 10 parts of titanium dioxide.

[0059] Preparation method:

[0060] Coco-glucoside-coco alcohol complex, PEG-100 stearate, dextrin palmitate, butyloctanol salicylate and octyl polymethicone were mixed at 95° C. for 8 minutes to dissolve, then mixed with titanium dioxide and polyhydroxystearic acid at 95° C. for 8 minutes to dissolve, and evenly dispersed by a homogenizer to obtain a sunscreen composition.

[0061] Example 3

[0062] The present embodiment provides a sunscreen composition, which includes, by weight: 1.5 parts of coconut glucoside-coconut alcohol complex, 0.5 parts of PEG-100 stearate, 0.9 parts of dextrin palmitate, 10 parts of butyl octanol salicylate, 0.9 parts of polyhydroxystearic acid, 9 parts of caprylyl polymethicone, and 15 parts of titanium dioxide.

[0063] Preparation method:

[0064] Coco-glucoside-coco alcohol complex, PEG-100 stearate, dextrin palmitate, butyloctanol salicylate and octyl polymethicone were mixed at 65° C. for 20 minutes to dissolve, then mixed with titanium dioxide and polyhydroxystearic acid at 65° C. for 20 minutes to dissolve, and evenly dispersed by a homogenizer to obtain a sunscreen composition.

[0065] Example 4

[0066] This embodiment provides a sunscreen composition, which differs from Embodiment 1 only in that polyhydroxystearic acid is not included in the composition, and the reduced weight fraction is supplemented by PEG-100 stearate, dextrin palmitate and caprylyl polymethicone in a mass ratio of 0.5:0.2:5.

[0067] Example 5

[0068] This embodiment provides a sunscreen composition, which differs from Embodiment 1 only in that caprylyl polymethicone is not included in the composition, and the reduced weight fraction is supplemented by PEG-100 stearate, dextrin palmitate and polyhydroxystearic acid in a mass ratio of 0.5:0.2:0.2.

[0069] Example 6

[0070] This embodiment provides a sunscreen composition, which differs from Embodiment 1 only in that polyhydroxystearic acid and caprylyl polymethicone are not included in the composition, and the reduced weight fraction is supplemented by PEG-100 stearate and dextrin palmitate in a mass ratio of 0.5:0.2.

[0071] Comparative Example 1

[0072] This comparative example provides a sunscreen composition, which differs from Example 1 only in that dextrin palmitate is not included in the composition, and the reduced weight portion is supplemented by PEG-100 stearate, polyhydroxystearic acid and caprylyl polymethicone in a mass ratio of 0.5:0.2:5.

[0073] Comparative Example 2

[0074] This comparative example provides a sunscreen composition, which differs from Example 1 only in that PEG-100 stearate is not included in the composition, and the reduced weight portion is supplemented by dextrin palmitate, polyhydroxystearic acid and caprylyl polymethicone in a mass ratio of 0.2:0.2:5.

[0075] Comparative Example 3

[0076] This comparative example provides a sunscreen composition, which is different from Example 1 only in that the composition does not include the coconut glucoside-coconut alcohol complex, and the reduced weight portion is supplemented by an equal amount of PEG-100 stearate.

[0077] Comparative Example 4

[0078] This comparative example provides a sunscreen composition, which is different from Example 1 only in that PEG-100 stearate is not included in the composition, and the reduced weight portion is supplemented by an equal amount of coconut glucoside-coconut alcohol complex.

[0079] Comparative Example 5

[0080] This comparative example provides a sunscreen composition, which is different from Example 1 only in that the composition does not include coconut glucoside-coconut alcohol complex, and the reduced weight portion is supplemented by dextrin palmitate and butyloctanol salicylate in a mass ratio of 0.2:8.

[0081] Comparative Example 6

[0082] This comparative example provides a sunscreen composition, which is different from Example 1 only in that dextrin palmitate is not included in the composition, and the reduced weight portion is supplemented by coconut glucoside-coconut alcohol complex and butyloctanol salicylate in a mass ratio of 1:8.

[0083] Comparative Example 7

[0084] This comparative example provides a sunscreen composition, which differs from Example 1 only in that butyl octanol salicylate is not included in the composition, and the reduced weight portion is supplemented by coconut glucoside-coconut alcohol complex and dextrin palmitate in a mass ratio of 1:0.2.

[0085] Application Example 1

[0086] This application example provides a sunscreen, comprising the following components:

[0087] Table 2

[0088]

[0089]

[0090] Preparation method:

[0091] (1) At 80° C., the sunscreen composition of Example 1 was mixed with cetearyl alcohol and stirred for 10 min to dissolve to obtain phase A; at 80° C., butylene glycol, ammonium acryloyldimethyltaurate / VP copolymer, xanthan gum and water were mixed and stirred for 10 min to obtain phase B; at 60° C., p-hydroxyacetophenone, 1,2-pentanediol and 1,2-hexanediol were mixed and stirred for 10 min to obtain phase C.

[0092] (2) Add phase A to phase B while stirring, homogenize at 2500 rpm for 10 min, and cool to 40°C while stirring.

[0093] (3) Mix phase C with the product of step (2) at 40° C. and stir for 10 min until uniform to obtain a sunscreen.

[0094] Application Example 2

[0095] This application example provides a sunscreen, comprising the following components:

[0096] Table 3

[0097]

[0098]

[0099] Preparation method:

[0100] (1) At 70° C., the sunscreen composition of Example 2 was mixed with cetearyl alcohol and stirred for 15 min to dissolve to obtain phase A; at 70° C., butylene glycol, ammonium acryloyldimethyltaurate / VP copolymer, xanthan gum and water were mixed and stirred for 15 min to obtain phase B; at 45° C., p-hydroxyacetophenone, 1,2-pentanediol and 1,2-hexanediol were mixed and stirred for 10 min to obtain phase C.

[0101] (2) Add phase A to phase B while stirring, homogenize at 2000 rpm for 10 min, and cool to 30°C while stirring.

[0102] (3) Mix phase C with the product of step (2) at 30° C. and stir for 10 min until uniform to obtain a sunscreen.

[0103] Application Example 3

[0104] This application example provides a sunscreen, comprising the following components:

[0105] Table 4

[0106]

[0107]

[0108] Preparation method:

[0109] (1) At 90° C., the sunscreen composition of Example 3 was mixed with cetearyl alcohol and stirred for 5 min to dissolve to obtain phase A; at 90° C., butylene glycol, ammonium acryloyldimethyltaurate / VP copolymer, xanthan gum and water were mixed and stirred for 5 min to obtain phase B; at 70° C., p-hydroxyacetophenone, 1,2-pentanediol and 1,2-hexanediol were mixed and stirred for 10 min to obtain phase C.

[0110] (2) Add phase A to phase B while stirring, homogenize at 3000 rpm for 7 min, and cool to 25°C while stirring.

[0111] (3) Mix phase C with the product of step (2) at 25° C. and stir for 15 min until uniform to obtain a sunscreen.

[0112] Application Examples 4 to 6

[0113] Application Examples 4 to 6 each provide a sunscreen, which differs from Application Example 1 only in that the sunscreen composition of Example 1 is replaced by the sunscreen composition of Examples 4 to 6, respectively, and the other components and preparation methods remain unchanged.

[0114] Comparative Application Examples 1 to 7

[0115] Comparative Application Examples 1 to 7 each provide a sunscreen, which differs from Application Example 1 only in that the sunscreen composition of Example 1 is replaced by the sunscreen composition of Comparative Examples 1 to 7, respectively, and the other components and preparation methods remain unchanged.

[0116] Test Example 1

[0117] Sun protection index (SPF value) determination:

[0118] With reference to the determination method of the sun protection index (SPF value) of sunscreen cosmetics in the 2015 edition of the Cosmetic Safety Technical Specifications, the samples of the above application examples and comparative application examples (i.e., the test products) were tested for the sun protection index.

[0119] SPF test method: 65 healthy volunteers aged 18-60 were selected and divided into 13 groups, with 5 people in each group. An irradiation area was selected on the back skin of the subjects. The minimum irradiation dose or the shortest irradiation time at which erythema appeared on the skin was taken as the minimum erythema dose (MED) of the normal skin of the subjects. The test product was also applied to the skin of the subjects at (2.00±0.05)mg / cm 2 Weigh the sample in the amount of 1000ml and apply it evenly to the test area. After waiting for 15-30 minutes, the minimum irradiation dose or shortest irradiation time at which erythema appears on the skin is the MED of the subject's skin under the protection of the product. The SPF value of the sample for a single subject is calculated using the following formula:

[0120] Individual SPF = MED of protected skin / MED of unprotected skin

[0121] The SPF values ​​of the sunscreens of corresponding application examples 1 to 6 and comparative application examples 1 to 7 were measured according to the above test method, and the results are shown in Table 5. From the SPF value test results of each application example, it can be seen that when any one of dextrin palmitate, butyl octanol salicylate or cocoyl glucoside-cocoyl alcohol complex is missing in the composition, the SPF value of the sunscreen product decreases to varying degrees, indicating that dextrin palmitate, butyl octanol salicylate and cocoyl glucoside have a significant synergistic effect in sunscreen enhancement.

[0122] Test Example 2

[0123] Clean water washability test:

[0124] The same 65 volunteers as in Test Example 1 were selected and divided into 13 groups, with 5 people in each group, and the water washability test was carried out according to the test method in the group standard "Test and Evaluation Method for Water Washability of Sunscreen Cosmetics".

[0125] (1) T0 stage: the subjects cleaned their faces with a cleaning product, and sat quietly for 20 minutes in an independent environment with a temperature of 21±1°C and a relative humidity of 50±10%. The basic values ​​of the indicators of the test parts of the subjects were measured using a skin colorimeter and a facial image analyzer. The volunteers in each group used the sunscreen products of application examples 1 to 6 and comparative application examples 1 to 9 under guidance;

[0126] (2) T immediate stage: 20 minutes later, the skin colorimeter and facial image analyzer were used to measure the indicators of the test area of ​​the subjects; volunteers in each group cleaned their faces under guidance (one half of the face was washed with clean water and a cleansing towel, and the other half was washed with cleansing oil and clean water and a cleansing towel);

[0127] (3) T post-cleaning stage: 20 min later, the skin colorimeter and facial image analyzer were used to measure the indicators of the test area of ​​the subject;

[0128] The cleaning rate is calculated according to the method in the "Test and Evaluation Method for the Washability of Sunscreen Cosmetics in Water". The cleaning rate results of each application example are shown in Table 5. If the cleaning rate is greater than 75%, it is considered to be washable with water, and if it is greater than 90, it is considered to be easy to wash with water.

[0129] It can be seen from the cleaning rate results of each application example and the comparative application example that when the composition lacks any one of the coconut glucoside-coco alcohol complex and polyethylene glycol stearate, the cleaning rate of the sunscreen product is greatly reduced, indicating that the coconut glucoside-coco alcohol complex and polyethylene glycol stearate can synergistically improve the water washability of the sunscreen product.

[0130] Test Example 3

[0131] White flow test:

[0132] The sunscreen products of the application example and the comparative application example were applied to a PET plate respectively, left to stand for 2 hours, and a constant water flow was naturally passed through to observe whether white stripes appeared when the water flowed through. The results are shown in Table 5.

[0133] It can be seen from the whitening test results of the products in various application examples that when any one of polyhydroxystearic acid, caprylyl polymethicone, dextrin palmitate and polyethylene glycol stearate is lacking in the composition, the whitening phenomenon of the sunscreen product is serious, indicating that polyhydroxystearic acid, caprylyl polymethicone, dextrin palmitate and cetearyl alcohol have a significant synergistic effect in improving the film-forming properties of the product.

[0134] Table 5

[0135]

[0136]

[0137] Test Example 4

[0138] Stability test:

[0139] (1) Appearance: Place the sunscreen of each application example and comparative application example under a standard light source at room temperature and observe the appearance of the material;

[0140] (2) Heat resistance: The sunscreens of each application example and comparative application example were placed in a 45°C electric constant temperature incubator for 90 days, and the appearance of the material was observed after returning to room temperature;

[0141] (3) Cold resistance: The sunscreens of each application example and comparative application example were placed in a -10°C refrigerator for 90 days, and the appearance of the materials was observed after returning to room temperature;

[0142] (4) Cyclic thermal stability: Within 72 hours, the sunscreens of each application example and comparative application example were repeatedly changed between -10°C and 45°C. This operation was repeated for 7 cycles. After returning to room temperature, the appearance of the material was observed.

[0143] The sunscreen stability test results of each application example and comparative application example are shown in Table 6.

[0144] Table 6

[0145]

[0146] It can be seen from the sunscreen stability test results of each application example that when the composition lacks any one of dextrin palmitate, butyl octanol salicylate or cocoyl glucoside-cocoyl alcohol complex, the stability of the sunscreen product decreases to varying degrees, indicating that dextrin palmitate, butyl octanol salicylate and cocoyl glucoside have a significant synergistic effect in improving the stability of the composition.

[0147] Test Example 5

[0148] Sensory evaluation test:

[0149] 55 volunteers from the same group as in Test Example 1 were selected and, after sitting for 20 minutes in an independent environment with a temperature of 21±1°C and a relative humidity of 50±10%, were tested using the sunscreens provided in Application Examples 1-6 and Comparative Application Examples 1-2, 4, 6-7, all of which had a uniform milky white appearance.

[0150] Scoring system: The score is 1-10 points. After scoring, the average value of each sample is taken. The higher the score, the more characteristic the indicator of the project. The test results are shown in Table 7.

[0151] Table 7

[0152]

[0153]

[0154] From the sensory evaluation test results of the products of each application example and comparative application example, it can be seen that when the composition lacks any one of polyhydroxystearic acid, caprylyl polymethicone, dextrin palmitate or polyethylene glycol stearate, the spreadability, moisturizing feel, freshness and smoothness of the product all decrease to varying degrees, indicating that polyhydroxystearic acid, caprylyl polymethicone, dextrin palmitate and polyethylene glycol stearate have a significant synergistic effect in improving the skin feel of the product.

[0155] The applicant declares that the present invention illustrates the technical solution of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0156] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0157] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A sunscreen composition, characterized in that: The sunscreen composition comprises coconut glucoside-coco alcohol complex, polyethylene glycol stearate, dextrin palmitate, butyloctanol salicylate and titanium dioxide.

2. The sunscreen composition according to claim 1, characterized in that The sunscreen composition also includes polyhydroxystearic acid and caprylyl methicone.

3. The sunscreen composition according to claim 1 or 2, characterized in that In parts by weight, the sunscreen composition comprises 0.1 to 2 parts of coconut glucoside-coconut alcohol complex, 0.1 to 1 part of polyethylene glycol stearate, 0.1 to 1 part of dextrin palmitate, 1 to 10 parts of butyl octanol salicylate, 0.1 to 1 part of polyhydroxystearic acid, 0.1 to 10 parts of octyl polymethylsiloxane, and 2 to 15 parts of titanium dioxide; Preferably, the number of repeating units of ethylene oxide in the polyethylene glycol stearate is 20-120.

4. A method for preparing the sunscreen composition according to any one of claims 1 to 3, characterized in that: The preparation method comprises the following steps: (1) mixing and dissolving coco-glucoside-coco alcohol complex, polyethylene glycol stearate, dextrin palmitate, butyloctanol salicylate and optional octyl polymethylsiloxane to obtain a mixture; (2) The mixture obtained in step (1) is mixed with titanium dioxide and optionally polyhydroxystearic acid, and homogenized to obtain a sunscreen composition.

5. The preparation method according to claim 4, characterized in that: The mixing temperature in step (1) is 60 to 95° C. and the mixing time is 2 to 30 min. Preferably, the mixing temperature in step (2) is 60 to 95° C., and the mixing time is 2 to 30 minutes.

6. A sunscreen, characterized in that: The sunscreen cream comprises the sunscreen composition according to any one of claims 1 to 3, a moisturizer, an emulsifier, a thickener, an antioxidant and water.

7. The sunscreen according to claim 6, characterized in that The moisturizer includes butylene glycol, 1,2-pentanediol, and 1,2-hexanediol; Preferably, the emulsifier comprises cetearyl alcohol; Preferably, the thickener comprises xanthan gum, ammonium acryloyldimethyltaurate / VP copolymer; Preferably, the antioxidant comprises p-hydroxyacetophenone.

8. The sunscreen according to claim 6 or 7, characterized in that: In parts by weight, the sunscreen comprises 5 to 30 parts of the sunscreen composition according to any one of claims 1 to 3, 1 to 10 parts of a moisturizer, 0.5 to 3 parts of an emulsifier, 0.05 to 1 part of a thickener, 0.3 to 0.6 parts of an antioxidant and 40 to 80 parts of water.

9. A method for preparing a sunscreen according to any one of claims 6 to 8, characterized in that: The preparation method comprises the following steps: (1) mixing and dissolving the sunscreen composition and the emulsifier to obtain phase A; mixing the thickener, water and an optional moisturizer to obtain phase B; and mixing the antioxidant and the optional moisturizer to obtain phase C; (2) adding phase A to phase B under stirring and homogenizing to obtain a homogeneous product; (3) Mix phase C with the homogenized product to obtain a sunscreen product.

10. The preparation method according to claim 9, characterized in that: The mixing temperature before obtaining phase A in step (1) is 70 to 90° C. and the mixing time is 2 to 30 min; Preferably, the mixing temperature before obtaining phase B in step (1) is 70 to 90° C., and the mixing time is 2 to 30 min; Preferably, the mixing temperature before obtaining phase C in step (1) is 40 to 70° C., and the mixing time is 2 to 30 min; Preferably, the stirring speed in step (2) is 2000-3000 rpm, the stirring temperature is 20-50° C., and the stirring time is 2-30 min; Preferably, the mixing temperature in step (3) is 20 to 50° C., and the mixing time is 2 to 30 minutes.

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