KR20200061141A - Cosmetic composition for blocking UV - Google Patents

Abstract

The present invention relates to a stick-type cosmetic composition for sun protection. More particularly, the present invention relates to a stick-type cosmetic composition for sun protection, containing titanium dioxide and zinc oxide surface-treated with octylmethoxycinnamate as a sunscreen agent. The composition has an increased UV blocking effect while turbidity and heavy metal content are reduced, and the spreadability and the hardness are improved to show an excellent feeling of use.

Description

Stick cosmetic composition for blocking UV rays {Cosmetic composition for blocking UV}

The present invention relates to an inorganic sunscreen stick-type cosmetic composition having improved spreadability and cloudiness.

Ultraviolet rays are first-class carcinogens designated by the World Health Organization (WHO), which burn skin, cause wrinkles and deterioration of elasticity, and cause skin cancer in severe cases. In order to avoid skin damage caused by UV rays, a sunscreen should be applied. UV B, which causes erythema or sunburn, has a higher sun protection factor (SPF), and UV A, which damages the skin dermis, has a PA index. The more +, the greater the blocking effect of the sunscreen.

Components of sunscreens can be divided into organic sunscreens and inorganic sunscreens. Organic sunscreens use organic chemicals to scatter or reflect ultraviolet light to chemically block ultraviolet light and heat ultraviolet energy absorbed by the skin. It prevents skin damage by converting it to form and letting it out. Because organic sunscreens have different blocking effects depending on the ultraviolet wavelength range for each component of the ultraviolet absorber, they can block a wide range of ultraviolet rays when used in combination, and have the advantage of having excellent spreadability and feeling of use and almost no clouding. In the process of decomposing ultraviolet rays, it may irritate the skin, cause skin allergies and inflammation, and there is a problem that the temperature of the skin surface is slightly increased due to the emission of infrared rays.

On the other hand, the inorganic sunscreen is a physical sunscreen, and forms a protective film on the surface of the skin, which serves to reflect or scatter ultraviolet rays before it hits the skin surface.Inorganic raw materials such as titanium dioxide and zinc oxide are the main inorganic sunscreen components. Is used. Inorganic sunscreens have excellent skin stability and sunscreen, but when applied to the skin, white whitiness occurs, and the spread is stiff, making it difficult to apply uniformly, there is a problem with poor usability, and heavy metal content is limited. Accordingly, there is a need to develop a sunscreen having an excellent sunscreen effect, no cloudiness, and a low heavy metal content.

KR 10-1410043 KR 10-2018-0109820

The present invention has an object to provide a stick-type cosmetic composition for blocking ultraviolet rays having a high UV blocking index, minimizing heavy metal content and cloudiness, and improving spreadability.

The present invention to achieve the above object,

In the stick-type cosmetic composition for sunscreen comprising an inorganic sunscreen, wax, and oil, the inorganic sunscreen is zinc oxide (ZnO) and titanium dioxide (TiO ₂ ) surface-treated with octyl methoxycinnamate It provides a stick-type cosmetic composition for blocking the sun, characterized in that it comprises a.

The wax is a bead wax, a microcrystalline wax or an ozokerite wax, and the oil is characterized by mixing coconut oil and avocado oil.

The composition is characterized in that it further comprises natural vitamin E, shea butter and aloe powder.

The zinc oxide surface-treated with octylmethoxycinnamate is characterized by mixing octylmethoxycinnamate and zinc oxide and performing ultrasonic treatment, and the zinc oxide surface-treated with octylmethoxycinnamate is the entire composition. It is characterized in that it contains 10 to 32.5 parts by weight based on 100 parts by weight.

The cosmetic composition is based on 100 parts by weight of the total composition, coconut oil 8 to 25 parts by weight, avocado oil 3 to 18 parts by weight, wax 10 to 32 parts by weight, shea butter 1 to 10 parts by weight, natural vitamin E 0.1 to 5 parts by weight Characterized in that it contains 0.1 to 5 parts by weight of parts and aloe powder.

In addition, the present invention, in another aspect, 1) a mixture of octyl methoxycinnamate, zinc oxide and a solvent, followed by sonication to prepare zinc oxide surface-treated with octylmethoxycinnamate; 2) adding and stirring titanium dioxide, coconut oil and avocado oil to the surface-treated zinc oxide; 3) Mixing the wax, shea butter and aloe powder, after all the wax is dissolved, adding to the mixture and stirring; 4) a step of adding natural vitamin E to the mixture and stirring to provide a method for preparing a stick-type cosmetic composition for blocking ultraviolet rays.

In the preparation method, with respect to 100 parts by weight of the total composition, 10 to 32.5 parts by weight of zinc oxide surface-treated with octylmethoxycinnamate, 0.5 to 25 parts by weight of titanium dioxide, 8 to 25 parts by weight of coconut oil, 3 avocado oil It characterized in that it contains 18 to 18 parts by weight, 10 to 32 parts by weight of wax, 1 to 10 parts by weight of shea butter, 0.1 to 5 parts by weight of natural vitamin E, 0.1 to 5 parts by weight of aloe powder, and 13 to 32 parts by weight of solvent.

The stick-type cosmetic composition for sunscreen according to the present invention has an increased sunscreen effect and reduced turbidity due to the addition of zinc oxide surface-treated with octylmethoxycinnamate, and microcrystalline wax and ozokerite wax As it is used, the heavy metal content is low, and there is an excellent effect of spreadability and rigidity. In addition, it can be applied not only to sunstick materials, but also to eco-friendly cosmetics and household goods.

Figure 1 shows the results of the color change comparison test according to the UV irradiation time.
Figure 2 shows the results of the turbidity comparison test.
Figure 3 shows the results of the UV spectrum analysis.
Figure 4 shows the SPF index measurement results according to the surface treated zinc oxide content.

Hereinafter, the stick-type cosmetic composition for blocking ultraviolet rays using the natural product of the present invention will be described in more detail.

In the present invention, in the stick-type cosmetic composition for sunscreen comprising an inorganic sunscreen, wax, and oil, the inorganic sunscreen is zinc oxide (ZnO) and titanium dioxide (T surface) treated with octyl methoxycinnamate ( It provides a stick-type cosmetic composition for sunscreen containing TiO ₂ ).

The octylmethoxycinnamate is also referred to as Ethylhexyl Methoxycinnamate, and can block both UV A and B, and can be used within the 7.5% range in Korea. The zinc oxide surface-treated with the octylmethoxycinnamate is preferably an ultrasonic treatment by mixing octylmethoxycinnamate and zinc oxide, and the zinc oxide is coated with octylmethoxycinnamate by ultrasonic treatment. Lose. The zinc oxide surface-treated with octylmethoxycinnamate preferably contains 10 to 32.5 parts by weight based on 100 parts by weight of the total composition.

The wax is a component that increases the hardness of the cosmetic, it is preferably a bead wax, microcrystalline wax or ozokerite wax. The beads wax (Bees wax) is also called beeswax, the main components are melicyl alcohol palmitic acid ester and setoric acid, in addition to various fatty acids, alcohols and higher hydrocarbons, etc. are contained. The microcrystalline wax is a petroleum-based wax, a mixture of solid hydrocarbons, and mainly made of isoparaffin. The ozokerite wax (Ozokerite wax) is a mineral wax of hydrocarbons extracted from minerals, and mainly functions to thicken non-polar oils such as hydrocarbon oils among oily components.

It is preferred that the oil comprises coconut oil and avocado oil. The coconut oil (Cocos Nucifera (Coconut) Oil) is a fat oil obtained by squeezing seeds that have been removed from the seeds of coco palm, and contains a large amount of saturated fatty acids, which has antibacterial and anti-inflammatory effects, has excellent emulsifying stability, spreadability and spreadability Good absorption. In addition, it has a light feeling of use, moisturizing the skin and alleviating UV irritation. The avocado oil serves as a base oil, and has a UV blocking effect. Also, because it contains a large amount of oleic acid, it has good spreadability and spreadability, so it is easy to absorb and soft to use.

It is preferred that the composition further comprises natural vitamin E, shea butter and aloe powder. The natural vitamin E is used as a natural preservative to serve as a preservative for the cosmetic composition, has skin protection and skin shine effects, and the aloe powder has a skin soothing effect. The shea butter means vegetable oil obtained from the fruit of a shea tree, and has a soft texture and UV protection effect. It is also known to have excellent skin moisturizing and regenerating effects, as well as antioxidant and anti-inflammatory effects.

The solvent may be silicone oil including methicone, cyclomethicone and PEG-10 dimethicone, but is not limited thereto.

The cosmetic composition is based on 100 parts by weight of the total composition, coconut oil 8 to 25 parts by weight, avocado oil 3 to 18 parts by weight, wax 10 to 32 parts by weight, shea butter 1 to 10 parts by weight, natural vitamin E 0.1 to 5 parts by weight It is preferable to include 0.1 to 5 parts by weight of a part and aloe powder, and when outside the above range, stability, usability, and UV blocking effect may be reduced.

In addition, the present invention is another aspect of the manufacturing method of the stick-type cosmetic composition for sun protection is 1) octyl methoxycinnamate, zinc oxide and a solvent, followed by sonication, followed by surface treatment with octylmethoxycinnamate. Preparing zinc oxide; 2) adding and stirring titanium dioxide, coconut oil and avocado oil to the surface-treated zinc oxide; 3) Mixing the wax, shea butter and aloe powder, after all the wax is dissolved, adding to the mixture and stirring; 4) adding natural vitamin E to the mixture and stirring it.

In the preparation method, with respect to 100 parts by weight of the total composition, 10 to 32.5 parts by weight of zinc oxide surface-treated with octylmethoxycinnamate, 0.5 to 25 parts by weight of titanium dioxide, 8 to 25 parts by weight of coconut oil, 3 avocado oil It is preferable to include 18 to 18 parts by weight, 10 to 32 parts by weight of wax, 1 to 10 parts by weight of shea butter, 0.1 to 5 parts by weight of natural vitamin E, 0.1 to 5 parts by weight of aloe powder, and 13 to 32 parts by weight of solvent.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are intended to illustrate the present invention, and the scope of the present invention is not limited thereto.

Example  1 to 5

Octyl methoxycinnamate, zinc oxide and a solvent (mixed solution of methicone, cyclomethicone and PEG-10 dimethicone) were added to the solution, followed by sonication, followed by stirring by adding titanium dioxide, coconut oil and avocado oil. . After mixing the wax, shea butter and aloe powder, when all of the wax is dissolved, the mixture is stirred into the mixture and then natural vitamin E is added and stirred. All experiments were conducted at 85°C. Table 1 below shows the component content.

Content (g) Example 1 Example 2 Example 3 Example 4 Example 5 Titanium dioxide 0.3 0.3 0.3 0.3 0.3 Zinc oxide 1.14 4.8 4.8 4.8 4.8 Octylmethoxycinnamate 0.37 1.56 1.56 1.56 1.56 Coconut oil 2 2 2 2 2 Avocado oil 2 2 2 2 2 Bead wax (non-refined) 3 3 - - - Beads wax (tablets) - - 7 - - Microcrystalline wax - - - 3 - Ozokerite wax - - - - 3 Shea butter One One One One One Natural vitamin E 0.2 0.2 0.2 0.2 0.2 Aloe powder 0.05 0.05 0.05 0.05 0.05 solvent 1.71 5.9 5.9 5.9 5.9

Example  6 to 11

It was prepared in the same manner as in Example 1 according to the content shown in Table 2 below.

Content (g) Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Titanium dioxide 0.3 0.3 0.3 0.3 0.3 0.3 Zinc oxide 4.8 4.8 4.8 4.8 4.8 4.8 Octylmethoxycinnamate 1.56 1.56 1.56 1.56 1.56 1.56 Coconut oil One 3 5 7 9 11 Avocado oil 2 2 2 2 2 2 Beads wax (tablets) 9 9 9 9 9 9 Shea butter One One One One One One Natural vitamin E 0.2 0.2 0.2 0.2 0.2 0.2 Aloe powder 0.05 0.05 0.05 0.05 0.5 0.5 solvent 5.9 5.9 5.9 5.9 5.9 5.9

Example  12 to 15

It was prepared in the same manner as in Example 1 according to the content shown in Table 3 below.

Content (g) Example 12 Example 13 Example 14 Example 15 Titanium dioxide 0.3 0.3 0.3 0.3 Zinc oxide 4.8 4.8 4.8 4.8 Octylmethoxycinnamate 1.56 1.56 1.56 1.56 Coconut oil 7 7 7 7 Avocado oil One 3 4 5 Beads wax (tablets) 9 9 9 9 Shea butter One One One One Natural vitamin E 0.2 0.2 0.2 0.2 Aloe powder 0.05 0.05 0.05 0.05 solvent 5.9 5.9 5.9 5.9

Comparative example  1 to 3

It was prepared in the same manner as in Example 1 according to the content shown in Table 4 below.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Titanium dioxide - 5.5 12.63 Zinc oxide 4.64 - 4.8 Octylmethoxycinnamate - - 1.56 Coconut oil 2 2 2 Avocado oil 2 2 2 Beads wax (non-refined) 3 3 3 Shea butter One One One Natural vitamin E 0.2 0.2 0.2 Aloe powder 0.05 0.05 0.05 solvent 5.67 8.25 24.85

Test example  1. UV protection performance evaluation

After applying the sample to the UV-coloring beads, the UV-blocking performance with time was evaluated by irradiating with a UV lamp (365 nm, irradiation height: 3 cm), before UV irradiation, 5 minutes after UV irradiation, and 10 minutes after UV irradiation. It is shown in FIG. 1. When the photochromic dye contained in the UV beads receives UV rays, the molecular structure changes, reflecting light of a specific wavelength, and when the UV supply is blocked, it returns to the original molecule and returns to the original white color. . As shown in FIG. 1, the color of the Examples and Comparative Examples changed to a light red color after a period of time, and Examples 1 and 2 were similar to those of other AHC and Scinic organic sunscreen products. It can be seen that it has an excellent sunscreen performance, such as an organic sunscreen. On the other hand, it can be seen that the inorganic sunscreens Dr.G and Carezone products are more reddish in color than the examples, thereby confirming that the performance of the examples is better. On the other hand, it was confirmed that the color of the control group without the sun stick was very red due to UV after time.

Test example  2. Cloudiness  evaluation

As the puff applied to the brown artificial leather showed the most turbidity compared to that applied to the actual skin, after rubbing the puff of similar size 40 times on the sun stick, this was then applied to the brown artificial leather (Alpha KID 2177, thickness 1.2 mm). ~ 4 mm, Biel Chemical) was applied 40 times to evaluate the cloudiness. As a result, as shown in FIG. 2, Example 2 in which the surface-treated zinc oxide was added shows similar turbidity to other inorganic sunscreens Dr.G and Carezone products, and it can be seen that the turbidity is low. On the other hand, it can be confirmed that the comparative example 2 in which titanium dioxide was added had a low turbidity, whereas the comparative example 1 in which zinc oxide was added had a very high turbidity.

Test example  3. UV absorption evaluation

After diluting the sample to 1000 ppm using ethanol as a solvent, the UV absorption was measured using a spectrophotometer. Referring to FIG. 3, Comparative Example 2 in which titanium dioxide was added showed the highest UV absorption, and Example 2 including Scinic and AHC products, which are organic sunscreens, and zinc oxide surface-treated, also showed high UV absorption. Did. On the other hand, Comparative Example 1 and Comparative Example 3 showed a low UV absorption, and it was confirmed that Dr.G and Carezone products also had relatively low UV absorption. Through the above results, it can be seen that Example 2 of the present invention has excellent UV blocking performance as it exhibits a UV absorption similar to that of an organic sunscreen.

Test example  4. SPF index measurement

SPF index by zinc oxide content surface-treated with octylmethoxycinnamate was measured. As a result, as shown in FIG. 4, it can be seen that the surface-treated zinc oxide rapidly increases from 10% or more to an SPF index of 30 or more, and the surface treatment is performed as the minimum required value of the sunscreen SPF index is 30 or more. The content of zinc oxide is preferably contained in 10 to 25%.

Test example  5. Heavy metal content analysis

(1) Heavy metal content analysis by sun stick ingredients

The lead content of each sunstick component was analyzed. As shown in Table 5 below, bead wax (non-refined) showed the highest lead content.

Beads wax
(Unrefined) Coconut oil Avocado oil Vitamin E Zinc oxide Pb (ppm) 13.1061 0.7728 4.9251 0.3719 2.0235

(2) Analysis of heavy metal content by wax

As a result of analyzing the heavy metal content for each sunstick component, as the wax wax (non-refined) shows the highest lead content, the heavy metal content is analyzed for the wax wax (refined), microcrystalline wax, and ozokerite wax. Did. As a result, as shown in Table 6, it was confirmed that the beads wax (tablet), microcrystalline wax and ozokerite wax showed a lower heavy metal content than the beads wax (tablet).

Metal content (ppm) Pb Ni As Hg CD Sb Microcrystalline wax 0.65735 - - - 0.00215 - Ozokerite wax 0.13776 0.07218 - 0.000714 - Beads wax (tablets) 0.0557 0.46028 0.00343 - 0.000868 -

(3) Heavy metal content analysis by sun stick

Heavy metal content by sun stick was analyzed. As shown in Table 7 below, Example 2, in which bead wax (non-refined) was added, showed a very high level of lead content of 45.464 ppm, but Example 3 (bead wax (tablet)), Example 4 (micro Crystalline wax) and Example 5 (ozokerite wax) were found to have a significant reduction in lead content to 1.689, 2.027, and 6.763 ppm, respectively. In addition, the content of heavy metals other than lead also satisfied the standards announced by the Ministry of Food and Drug Safety. On the other hand, Scinic products, which are organic sunscreens of other companies, have a very high lead content of 114.3446 ppm.

Metal content (ppm) Pb Ni As Hg CD Sb Example 2 45.464 - 0.009 - 0.005 0.008 Example 3 1.689 1.903 0.0348 0.043 0.0724 - Example 4 2.027 0.598 0.0334 0.0213 0.0932 - Example 5 6.763 0.4386 0.0185 0.0152 0.1869 - AHC - - - 0.00507 - 0.04446 Scinic 114.3446 - - 0.01703 - - Dr.G - - 0.23159 0.01057 - - Carezone - - - 0.00381 - -

Test example  6. Oil Contact angle  Measure

To evaluate the spreadability of the oil, the sample was dropped on artificial leather to measure the contact angle. In Table 8, it can be seen that the coconut oil in the sample had the lowest contact angle of 11.46186° and the avocado oil was 10.89040°. Accordingly, it was confirmed that coconut oil and avocado oil had excellent spreadability. Therefore, in the present invention, a sun stick was prepared using coconut oil and avocado oil.

Average Left angle Right angle Coconut oil 11.46186 11.46229 11.46143 Avocado oil 10.89040 10.88833 10.89248 Olive Extra Virgin 11.74718 11.72294 11.77142 Olive pure oil 11.79374 11.79275 11.79472 Jojoba oil 11.65146 11.48590 11.81702 Wet Oil 11.70739 11.64122 11.77356

Test example  7. Usability  Test

(1) Feeling test according to the content of coconut oil

According to the content of coconut oil, the usability of the sun stick was tested, and in Table 9 below, ◎: very good, ○: good, △: normal, ×: bad. Example 9 showed the best results in evaluation items of spreadability, rigidity and stickiness.

Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Spreadability ◎ ◎ ○ ○ △ △ stiffness × △ △ ○ ◎ ◎ Stickiness ◎ ◎ ○ ○ △ △

(2) Feeling test according to the content of avocado oil

In the usability test according to the content of the coconut oil, referring to Example 9 showing the best result, the content of coconut oil was the same as in Example 9, and the feeling of Examples 12 to 15 was varied with the content of avocado oil. Was tested. In Table 10, ◎: very good, ○: good, △: normal, ×: means bad, and all of Examples 12 to 15 showed excellent results, of which Example 15 was the best in the evaluation items of spreadability and stickiness. It showed excellent results.

Example 12 Example 13 Example 14 Example 15 stiffness ○ ○ ○ ○ Spreadability ○ ○ ◎ ◎ Stickiness ○ ○ ◎~○ ◎ slide ○ ○ △ △

Above, the present invention has been described by way of example, and those skilled in the art to which the present invention pertains will be capable of various modifications without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present specification are not intended to limit the present invention, but to explain the present invention, and the spirit and scope of the present invention are not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technologies within the equivalent range should be interpreted as being included in the scope of the present invention.

Claims (9)

In the stick-type cosmetic composition for sunscreen comprising an inorganic sunscreen, wax and oil,
The inorganic sunscreen is a stick-type cosmetic composition for sunscreen, comprising zinc oxide (ZnO) and titanium dioxide (TiO ₂ ) surface-treated with octyl methoxycinnamate.
The method of claim 1, wherein the wax is a stick-type cosmetic composition for sunscreen, characterized in that the bead wax, microcrystalline wax or ozokerite wax
The method of claim 1, wherein the oil is a stick-type cosmetic composition for sunscreen, characterized in that a mixture of coconut oil and avocado oil
The composition of claim 1, wherein the composition further comprises natural vitamin E, shea butter and aloe powder.
The method of claim 1, wherein the octyl methoxycinnamate surface-treated zinc oxide is a mixture of octyl methoxycinnamate and zinc oxide and subjected to ultrasonic treatment (sonication), stick-type cosmetic composition for UV protection
According to claim 5, With respect to 100 parts by weight of the total composition, the zinc oxide surface-treated with octylmethoxycinnamate comprises 10 to 32.5 parts by weight of a sunscreen stick-type cosmetic composition
According to claim 1, with respect to 100 parts by weight of the total composition, coconut oil 8 to 25 parts by weight, avocado oil 3 to 18 parts by weight, wax 10 to 32 parts by weight, shea butter 1 to 10 parts by weight, natural vitamin E 0.1 to UV-resistant stick-type cosmetic composition comprising 5 parts by weight and aloe powder 0.1 to 5 parts by weight
1) Mixing octylmethoxycinnamate, zinc oxide and a solvent, followed by sonication to prepare zinc oxide surface-treated with octylmethoxycinnamate; 2) adding and stirring titanium dioxide, coconut oil and avocado oil to the surface-treated zinc oxide; 3) Mixing the wax, shea butter and aloe powder, after all the wax is dissolved, adding to the mixture and stirring; 4) adding natural vitamin E to the mixture and stirring it; a method for preparing a stick-type cosmetic composition for blocking sunblock, comprising
According to claim 8, 10 to 32.5 parts by weight of zinc oxide surface-treated with octylmethoxycinnamate, with respect to 100 parts by weight of the total composition, 0.5 to 25 parts by weight of titanium dioxide, 8 to 25 parts by weight of coconut oil, avocado oil 3 To 18 parts by weight, 10 to 32 parts by weight of wax, 1 to 10 parts by weight of shea butter, 0.1 to 5 parts by weight of natural vitamin E, 0.1 to 5 parts by weight of aloe powder, and 13 to 32 parts by weight of solvent Method of manufacturing a stick-type cosmetic composition for blocking

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