KR102053646B1 - Powder composite for protecting Blue-light and IR ray and cosmetics composition using the same - Google Patents

Abstract

Infrared light causing skin aging is pointed out in the sunlight, but recently, photo-aging is reported to be progressed by the infrared light other than ultraviolet rays or blue light in a visible light region. Since the ultraviolet rays and the blue light penetrate deeper into the skin than the infrared light, it is important to effectively block the ultraviolet rays and the blue light for skin health. Therefore, the present invention relates a composite powder which can simultaneously block ultraviolet rays and blue light, and to a production method of a cosmetic composition comprising the composite powder. Since the composite powder of the present invention has an effect of effectively blocking the ultraviolet rays and the blue light without irritating the skin, it is expected to be widely used in cosmetic and medical fields.

Description

Preparation of composite powder for simultaneous blocking of infrared ray and blue light and cosmetic composition using same {Powder composite for protecting Blue-light and IR ray and cosmetics composition using the same}

The present invention relates to the preparation of a composite powder for blocking infrared and blue light simultaneously and to a cosmetic composition using the same.

Aging of the skin includes natural aging that occurs over time and aging caused by the external environment. The most important factor in aging due to the external environment is sunlight, so aging is called photoaging. Sunlight includes visible rays, infrared rays, and ultraviolet rays, among which ultraviolet rays (Ultraviolet rays) reduce the amount of collagen that maintains the skin's firmness when exposed frequently, and the amount of elastin increases so that the skin's elasticity It is easy to lose. In this process, the skin also increases melanocytes as a means of defense to produce spots, blemishes, and freckles. In severe cases, skin cancer is known to occur. Accordingly, research on UV protection has been continued for a long time, and UV protection technology of various ingredients and formulations has been disclosed (Korean Patent No. 10-2016-0084825, Korean Patent No. 10-2007800, and Korean Patent No. 10-2005229, etc.).

Recently, however, it has been reported that photoaging progresses also by infrared rays other than ultraviolet rays and blue light (blue light) in the visible light region. Infrared ray (IR) has a longer wavelength and stronger heat action than ultraviolet rays, and has a long wavelength and less scattering effect. Therefore, when the skin is directly exposed to infrared rays, the infrared rays penetrate deep into the skin to increase the skin temperature and promote aging. In particular, unlike ultraviolet rays that reach the epidermis or dermis, it reaches down to the subcutaneous fat and destroys collagen, thereby lowering skin elasticity and causing wrinkles. Therefore, infrared rays are more dangerous than ultraviolet rays in terms of skin health. Blue light is a blue light source that exists in the wavelength range of 380 ~ 500nm, not only exists naturally but also occurs in electronic devices such as smartphones, TVs, computer monitors. Proper blue light, which is included in natural visible light, is a natural vital ingredient that promotes the production of the happy hormones serotonin and melatonin, which are used to treat acne, sedation, and scalp for hair growth. However, due to the rapid increase in the frequency of exposure of the skin to the liquid crystal display of the electronic device in modern times, excessive blue light is pointed to as a cause of the increase of free radicals in the skin. Blue light penetrates into the skin layer deeper than the sun's ultraviolet rays, triggers the production of free radicals (ROS) in the skin, and the activated free radicals (ROS) activate the expression of Matrix Metalloproteases (MMPs) enzymes that cause skin aging. (Y. Kuse, K. Ogawa, K. Tsuruma, M. Shimazawa, and H. Hara, Damage of photoreceptor-derived cells in culture induced by light emitting diode-derived blue light, Sci. Rep-UK, 4, 5223 (2014)).

Therefore, the present invention relates to a composite powder capable of blocking infrared light and blue light at the same time, and a method for producing a cosmetic composition comprising the composite powder. Since the composite powder of the present invention has an effect of effectively blocking infrared light and blue light without being irritating to the skin, it is expected to be widely used in cosmetic and medical fields.

An object of the present invention for solving the above problems is to provide a method for producing a composite powder for blocking infrared light and blue light simultaneously, and to use the composite powder prepared by the method of the present invention as a cosmetic composition.

However, the technical problem to be achieved by the present invention is not limited to the above-mentioned problem, another task that is not mentioned will be clearly understood by those skilled in the art from the following description.

Hereinafter, various embodiments described herein are described with reference to the drawings. In the following description, for a thorough understanding of the present invention, various specific details are set forth, such as specific forms, compositions, processes and the like. However, certain embodiments may be practiced without one or more of these specific details, or in conjunction with other known methods and forms. In other instances, well known processes and manufacturing techniques have not been described in particular detail in order to not unnecessarily obscure the present invention. Reference throughout this specification to "one embodiment" or "embodiment" means that a particular feature, form, composition or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, the context of “in one embodiment” or “embodiment” expressed at various places throughout this specification does not necessarily represent the same embodiment of the invention. In addition, particular features, forms, compositions, or properties may be combined in any suitable manner in one or more embodiments.

Unless otherwise defined, all scientific and technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

In the present invention, "infrared ray (IR)" means an electromagnetic wave which has a wavelength longer than visible light and falls in the range of 0.75 µm to 1 mm. More specifically, infrared rays having a wavelength of 0.75 to 3 µm are called near infrared rays, and those having 3 to 25 µm are simply called infrared rays, and those having 25 µm or more are called far infrared rays. It is characterized by having a stronger heat action than visible light or ultraviolet light, which is why it is also called a heat ray. Infrared drying and heating of various materials, industrial products and agricultural and fishery products using the thermal effect characteristics are widely used in industry and real life. In the medical field, near-infrared rays are widely used for disinfection and sterilization and for the treatment of joints and muscles, and 10 μm infrared laser beams are used for surgery, removal of tumors, and connection of nerves. However, in terms of skin beauty, it penetrates deep into the skin to raise the skin temperature and promote aging. In particular, unlike ultraviolet rays that reach the epidermis or dermis, it reaches down to the subcutaneous fat and destroys collagen, thereby lowering skin elasticity and causing wrinkles. Therefore, infrared rays are more dangerous than ultraviolet rays in terms of skin health.

In the present invention, "blue light" is also referred to as blue light, and is a blue light source existing at a wavelength between 380 and 500 nm. It exists naturally, but is emitted from displays and LED lighting devices of smart devices such as TVs and computers. Proper blue light, which is included in natural visible light, is a natural vital ingredient that promotes the production of the happy hormones serotonin and melatonin, which are used to treat acne, sedation, and scalp for hair growth. However, prolonged exposure to blue light may cause eye fatigue as well as dry eye, and in severe cases, damage to the retina or lens in the eye. If you watch your smartphone, PC, or TV for a long time late at night, blue light may interfere with your sleep-inducing hormone secretion. In terms of skin beauty, it is considered as a cause of the increase of free radicals in the skin. Blue light penetrates into the skin layer deeper than the sun's ultraviolet rays, triggers the production of free radicals (ROS) in the skin, and the activated free radicals (ROS) activate the expression of Matrix Metalloproteases (MMPs) enzymes that cause skin aging. (Y. Kuse, K. Ogawa, K. Tsuruma, M. Shimazawa, and H. Hara, Damage of photoreceptor-derived cells in culture induced by light emitting diode-derived blue light, Sci. Rep-UK, 4, 5223 (2014)).

In the present invention, "composite powder" refers to a powder containing two or more active ingredients, more specifically, zinc powder and diatomaceous earth, and are powders having the effect of simultaneously blocking infrared rays and blue light. .

In the present invention, "cosmetic composition" means a composition to be administered for a specific purpose. For the purpose of the present invention, the cosmetic composition of the present invention contains a composite powder prepared by the method of the present invention as an active ingredient, lotion, nutrition lotion, nutrition essence, massage cream, beauty bath additives, body lotion, body milk, Bath oil, baby oil, baby powder, shower gel, shower cream, sunscreen lotion, sunscreen cream, suntan cream, skin lotion, skin cream, sunscreen cosmetic, cleansing milk, depilatory {cosmetic}, face and body lotion , Face and Body Cream, Skin Whitening Cream, Hand Lotion, Hair Lotion, Cosmetic Cream, Jasmine Oil, Bath Soap, Water Soap, Beauty Soap, Shampoo, Hand Cleanser (Hand Cleaner), Medicated Soap {Non-Medical}, Cream Soap, Facial wash, hair rinse, cosmetic soap, tooth whitening gel, toothpaste and the like. To this end, the cosmetic composition in the present invention may further include a suitable carrier, excipient or diluent commonly used in the preparation of the cosmetic composition. Carriers, excipients or diluents which may be further added to the cosmetic composition in the present invention include purified water, oils, waxes, fatty acids, fatty alcohols, fatty acid esters, surfactants, humectants, thickeners, antioxidants, viscosity stabilizers, Chelating agents, buffers, lower alcohols, and the like. In addition, a whitening agent, a moisturizing agent, vitamins, sunscreens, perfumes, dyes, antibiotics, antibacterial agents, antifungal agents may be included as necessary. The oil may be hydrogenated vegetable oil, castor oil, cottonseed oil, olive oil, palm oil, jojoba oil, avocado oil, wax, wax, carnauba, candelilla, montan, ceresin, liquid paraffin, lanolin Can be used. Stearic acid, linoleic acid, linolenic acid, oleic acid may be used as the fatty acid, and cetyl alcohol, octyldodecanol, oleyl alcohol, pantenol, lanolin alcohol, stearyl alcohol, hexadecanol may be used as fatty acid alcohol. And isopropyl myristate, isopropyl palmitate, butyl stearate may be used as the fatty acid ester. As surfactants, cationic surfactants, anionic surfactants and nonionic surfactants known in the art can be used, and surfactants derived from natural products are preferred as much as possible. In addition, it may include a hygroscopic agent, a thickener, an antioxidant, and the like, which are widely known in the cosmetic field, and their types and amounts are known in the art.

In one embodiment of the invention, (a) ultrasonic grinding pre-treatment of metal ions; (b) adding (a) to at least 80 ° C. and adding diatomaceous earth and reacting for at least 2 hours; (c) washing (b) with distilled water to remove impurities and salts; And (d) drying the (c); wherein the metal ion in step (a) is zinc oxide, and (b) Diatomaceous earth in the step is characterized in that the "molar ratio of zinc oxide: diatomaceous earth is 1: 0.175 to 1: 0.225" is added, the step (b) is characterized in that the reaction is maintained at pH 5.5 to 6.5 with acid And, the acid is sulfuric acid, it provides a method for producing a diatomaceous earth coated zinc oxide composite powder.

Wherein the zinc oxide provides a method for producing a diatomaceous earth coated zinc oxide composite powder, characterized in that the particle size of 0.5 ㎛ to 2.0 ㎛ size, the zinc oxide is characterized in that the zinc oxide of the Urgite structure It provides a method for producing a diatomaceous earth coated zinc oxide composite powder, the diatomaceous earth provides a method for producing a diatomaceous earth coated zinc oxide composite powder, characterized in that the particle size of 50 nm to 1,000 nm. It provides a method for producing a diatomaceous earth coated zinc oxide composite powder characterized in that the surface area of 10 m2 / g to 500 m2 / g, the diatomaceous earth is diatomaceous earth characterized in that the oil absorption amount is 100 cc / 100g to 1,000 cc / 100g It provides a method for producing a coated zinc oxide composite powder, the diatomaceous earth is diatomaceous earth, characterized in that the specific gravity of the hollow is 5% by volume to 50% by volume Oxidized to provide a method of manufacturing a composite zinc powder.

In another embodiment of the present invention, there is provided a diatomaceous earth coated zinc oxide composite powder prepared by the above production method.

The composite powder provides infrared, and diatomaceous earth coated zinc oxide composite powder characterized in that it has a blue light blocking effect, wherein the infrared ray is a diatomaceous earth coated zinc oxide composite powder, characterized in that the light source having a wavelength of 760 nm to 1,400 nm. In addition, the blue light provides a diatomaceous earth coated zinc oxide composite powder, characterized in that the light source of 400 nm to 500 nm wavelength.

In another embodiment of the present invention, it provides a cosmetic composition comprising the diatomaceous earth coated zinc oxide composite powder.

The cosmetic composition provides a cosmetic composition, characterized in that the composite powder is contained in 5% by weight to 20% by weight, the cosmetic composition provides a cosmetic composition, characterized in that the infrared and blue light blocking effect, Infrared rays provide a cosmetic composition, characterized in that the light source of 760 nm to 1,400 nm wavelength, the blue light provides a cosmetic composition, characterized in that the light source of 400 nm to 500 nm wavelength.

In addition, the cosmetic composition provides a water-in-oil type solution suspension, an oil-in-water type solution suspension, emulsion, paste, gel, cream, lotion, powder, oil, stick, balm, or spray formulation.

Hereinafter, the present invention will be described in detail step by step.

The present invention relates to a composite powder capable of simultaneously blocking infrared rays and blue light, and a method for producing a cosmetic composition comprising the composite powder. When applying the cosmetic composition comprising the composite powder of the present invention on the skin, it is possible to significantly block the light of the infrared and blue light region, and can be used as a product of the triple complex function by using in combination with the sunscreen material. As described above, the cosmetic composition including the composite powder of the present invention is capable of blocking a wide range of wavelengths that have a harmful effect on the skin, and thus, the skin anti-aging effect is remarkable, and thus it is expected to be widely used in cosmetic and medical fields.

1 is a result of confirming the zinc oxide surface before and after the diatomaceous earth coating according to an embodiment of the present invention by an electron microscope.
Figure 2 is a result of confirming the Zn peak reduction rate when the reaction time 2 hours or more in the manufacturing process of the zinc oxide particles coated with diatomaceous earth according to an embodiment of the present invention.
Figure 3 is the result of confirming the Si-O-Si peak increase width when the reaction time 2 hours or more in the manufacturing process of the zinc oxide particles coated with diatomaceous earth according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention in more detail, and it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples according to the gist of the present invention. .

Example 1 Preparation of Mixed Powder for Infrared and Blue Light Blocking Simultaneously

Example 1-1. Pretreatment, and screening of metal ions

20 g of aluminum oxide, zinc oxide, tin chloride, tin chloride, stannous oxide, zinc chloride, cuprous chloride, ferric chloride, or titanium tetrachloride as a metal oxide is added to a sand dune flask reactor with 100 to 500 ml of distilled water. The mixture was stirred at 250 rpm for 45 min and dispersed evenly. After stirring, the mixture was pulverized with ultrasonic waves for 30 min to physically disperse the aggregated form between particles. As a result of comparing the metal ions pretreated as described above with the metal ions not pretreated, it was confirmed that the metal ions subjected to the ultrasonic pulverization pretreatment had a good coating effect when diatomaceous earth was attempted. In addition, zinc oxide showed the best infrared ray blocking effect among the tested metal ions. Therefore, in the following examples, mixed powder preparation experiments were performed with pre-treated zinc oxide.

Example 1-2. Setting diatomaceous earth coating conditions on zinc oxide

Zinc oxide was used as 1 micron zinc oxide (ZnO, 99.9%, ZOCHEM, USA), the diatomaceous earth is nanoparticle diatomaceous earth (SiO ₂ , 89%, IMERIS, France), the diameter of the particles 50 to 1,000 nanometers And a specific surface area of 10 to 500 m 2 / g, oil absorption of 100 to 1,000 cc / 100 g, and specific gravity of 5 to 50% by volume of hollow. As a catalyst for controlling the reaction to coat the diatomaceous earth with zinc oxide, sulfuric acid (H ₂ SO ₄ , 95.0%, Samchun Pure Chemical Co., Ltd., Korea), hydrochloric acid (HCl, 35.0 to 37.0%, Samchun Pure Chemical Co.) , Ltd., Korea), or nitric acid (HNO ₃ , 60%, Matsunoen Chemical Co., Ltd., Korea).

To prepare the zinc oxide particles coated with diatomaceous earth, the zinc oxide solution, which was pretreated by the method of Example 1 and evenly dispersed in distilled water, was warmed to 60 to 100 ° C., thereby surface modification. At the same time, the diatomaceous earth calculated as Zn: Si molar ratio 1: 0.10 to 1: 0.20 was added to the reactor, followed by stirring for 30 min at 250 rpm. After stirring, the acid catalyst was added to maintain a pH of 4 to 8, reacted for 2 to 24 h, washed several times with distilled water to remove impurities and salts formed during the reaction after completion of the reaction, and 24 h at 100 ° C. Dried over. After drying, a zinc oxide particle coated with white diatomaceous earth can be obtained. Based on the conditions described above, in order to compare the presence and optimum conditions of the coating of silicon dioxide with acid catalyst type, pH, Zn: Si mole ratio, the amount of solvent, the reaction temperature and time as the experimental variables Zinc oxide particles coated with diatomaceous earth were prepared by varying the reaction conditions as shown in Table 5.

variable Experimental variables XRD FT-IR catalyst pH Zn: Si molar ratio Amount of solvent
(Ml) Temperature
(℃) time
(hr) max intensity
2Θ = 36.3
Zn peak
(%) max intensity
1000 cm ^-1
Si-O peak
(%) Pure Zinc Oxide 100.00 100.00 catalyst
Kind and
pH Sulfuric acid 4 1: 0.10 100 80 2 70.01 340.58 6 66.00 485.15 8 69.89 394.43 nitric acid 4 1: 0.10 100 80 2 67.18 2147.68 6 65.36 2250.06 8 74.53 17.15.52 Hydrochloric acid 4 1: 0.10 100 80 2 62.28 1908.91 6 60.27 2081.25 8 66.16 1896.65

variable Experimental variables XRD FT-IR catalyst pH Zn: Si molar ratio Amount of solvent
(Ml) Temperature
(℃) time
(hr) max intensity
2Θ = 36.3
Zn peak
(%) max intensity
1000 cm ^-1
Si-O peak
(%) Pure Zinc Oxide 100.00 100.00 catalyst
Kind and
pH Sulfuric acid 6 1: 0.10 100 80 2 66.00 485.15 1: 0.15 59.73 1210.05 1: 0.20 51.04 2289.28 nitric acid 6 1: 0.10 100 80 2 65.36 2250.06 1: 0.15 60.29 2289.28 1: 0.20 50.99 3269.28 Hydrochloric acid 6 1: 0.10 100 80 2 60.27 2081.25 1: 0.15 59.83 2453.10 1: 0.20 53.82 2819.54

variable Experimental variables XRD FT-IR catalyst pH Zn: Si molar ratio Amount of solvent
(Ml) Temperature
(℃) time
(hr) max intensity
2Θ = 36.3
Zn peak
(%) max intensity
1000 cm ^-1
Si-O peak
(%) Pure Zinc Oxide 100.00 100.00 menstruum
amount nitric acid 6 1: 0.20 100 80 2 50.99 3269.28 300 95.87 2819.54 500 114.89 2516.20

variable Experimental variables XRD FT-IR catalyst pH Zn: Si molar ratio Amount of solvent
(Ml) Temperature
(℃) time
(hr) max intensity
2Θ = 36.3
Zn peak
(%) max intensity
1000 cm ^-1
Si-O peak
(%) Pure Zinc Oxide 100.00 100.00 synthesis
Temperature nitric acid 6 1: 0.20 100 60 2 109.75 2819.54 80 50.99 3269.28 100 51.04 3247.31

variable Experimental variables XRD FT-IR catalyst pH Zn: Si molar ratio Amount of solvent
(Ml) Temperature
(℃) time
(hr) max intensity
2Θ = 36.3
Zn peak
(%) max intensity
1000 cm ^-1
Si-O peak
(%) Pure Zinc Oxide 100.00 100.00 synthesis
time nitric acid 6 1: 0.20 100 80 2 50.99 3269.28 12 52.32 3301.54 24 51.25 3222.68

In order to confirm the crystallinity and the composition of the particles prepared in Tables 1 to 5 were analyzed using an X-ray diffractometer (X-Ray Diffracto Metor, XRD, RTP300RC, Rugaku Co., Japan), the results were JCPDS The crystal pattern was confirmed through a Joint Committee on Power Diffraction card and references. As the analysis conditions, the scan speed was adjusted to 5 ° / min in a diffraction angle (2θ) range of 5 to 80 ° using Cu-Kα radiation to obtain diffraction spectrum. The functional group analysis of the composite was performed using Fourier Transform Infrared Spectroscopy (FT-IR, 480plus, Jasco, USA), and the analysis was performed without any pretreatment of the sample by applying attenuated total reflectance (ATR) method. . The shape and particle size of the particles were confirmed using an electron microscope (Scanning Electron Microscope, SEM, LEO-1530FE, Hitachi Co., Japan). As a result, it was confirmed that diatomaceous earth is homogeneously coated on the zinc oxide surface (see FIG. 1).

As a result of the experiments of Tables 1 to 5, the optimum conditions for the production of diatomite-coated zinc oxide particles were pH 6, Zn: Si mole ratio 1: 0.20, 100 mL of solvent, reaction temperature of 80 ° C or higher, and reaction under nitric acid catalyst. It was confirmed that it was more than 2 hours. In the case of the reaction time, it was confirmed that the Zn peak reduction rate and the Si-O-Si peak increase range were similar at two hours or more, and in terms of energy efficiency, the reaction time was set at 2 hours and the reaction temperature was set at 80 ° C. (FIGS. 2 and 3). Reference). In addition, as a result of confirming the composite powder (diamond oxide coated with diatomaceous earth) prepared by the above method with the JCPDS card of XRD, both zinc oxide and zinc oxide coated with diatomaceous earth before coating were typical zinc oxide of urethane structure. It was confirmed that there was no deformation. However, in the case of zinc oxide coated with diatomaceous earth, the zinc oxide's intrinsic crystal phase diffraction intensity was significantly reduced compared to before coating, which was disturbed by diffraction when X-rays were irradiated with zinc oxide on the zinc oxide surface. It is understood that this is because the inherent crystal phase diffraction intensity decreases.

Example 2. Preparation of Cosmetic Composition for Blocking Infrared and Blue Light Simultaneously

The cosmetic composition was prepared in the following steps (a) to (e).

(a) 0.5% by weight beeswax, 0.5% by weight carnauba wax, 30.0% by weight cyclopentasiloxane, 3.0% by weight cyclohexasiloxane, 3.0% by weight Fiji-10 dimethicone, cetyl Fiji / Fiji-10 1.0% by weight of dimethicone, 1.0% by weight of sorbitan isostearate, and 1.0% by weight of disteadimonium hectorite are mixed and dispersed.

(b) The inorganic material of Table 6 is mixed with the oily mixture of (a) and then homogeneously dispersed.

Inorganic material Comparative Example 1 Blank Comparative Example 2 Zinc Oxide 5.0 wt% Comparative Example 3 Diatomaceous Earth 5.0 wt% Comparative Example 4 2.5 wt% zinc oxide, and 2.5 wt% diatomaceous earth (simple mixing) Preparation Example 1 2.5% by weight of the composite powder of Example 1 Preparation Example 2 5.0 wt% of the composite powder of Example 1 Preparation Example 3 7.5% by weight of the composite powder of Example 1

(c) 0.5% by weight of magnesium sulfate, 5.0% by weight of polyol, and a suitable amount of preservative are mixed into the water phase.

(d) The above (c) is added to (b), and purified water is mixed and emulsified to make the final 100 ml.

(e) Cool at room temperature.

Example 3. Confirmation of the effect of the cosmetic composition for blocking infrared and blue light simultaneously

Example 3-1. Check the effect of blocking infrared rays

Samples were applied at 2 mg / cm < 2 > on a poly methyl methacrylate (PMMA) plate, and dried sufficiently under constant temperature and humidity conditions for 30 minutes. Then, the transmittance at 780-1400 nm was measured using Near IR spectrophotometer (ASD). The results are shown in Table 7 below.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Preparation Example 1 Preparation Example 2 Preparation Example 3 Transmittance (%) 100 78.6 100 88.8 89.2 77.3 63.2 % Blocked 0 21.4 0 11.2 10.8 22.7 36.8

From the results of Table 7, it can be seen that zinc oxide has a blocking effect in the near infrared wavelength band, and in the case of diatomaceous earth (Comparative Example 3), there was no blocking ratio in the near infrared wavelength band. However, in the case of the cosmetic composition containing 5% by weight of the composite powder for blocking infrared and blue light simultaneously (Preparation Example 2), the near-infrared blocking effect was higher than the cosmetic composition containing only 5% by weight of zinc oxide (Comparative Example 2). Considering that the zinc oxide contained in 5% by weight of the composite powder is 4.36% by weight (Zn: Si molar ratio of 1: 0.20), the near-infrared blocking rate of 100% of the zinc oxide simple component is 121.74%. The powder has a near-infrared blocking effect of 21.74% compared to zinc oxide.

As a result, it was confirmed that the blocking ability of the composite powder is superior to that of the zinc oxide simple component in the near infrared wavelength range, which is considered to be a synergistic effect caused by the production of the diatomaceous earth coated composite powder.

Example 3-2. Check blue light block effect

Samples were applied at 2 mg / cm < 2 > on a poly methyl methacrylate (PMMA) plate, and dried sufficiently under constant temperature and humidity conditions for 30 minutes. Thereafter, the UV-Vis spectrophotometer (S-3100, Scinco) was used to measure the transmittance (Transmittance) at a wavelength of 380 ~ 500nm. The results are shown in Table 8 below.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Preparation Example 1 Preparation Example 2 Preparation Example 3 Transmittance (%) 100 96.8 84.6 89.9 90.2 78.8 65.1 % Blocked 0 3.2 15.4 10.1 9.8 21.2 34.9

From the results of Table 8, it can be seen that diatomaceous earth (Comparative Example 2) has a blocking effect in the blue light wavelength band, and zinc oxide (Comparative Example 3) also exhibits a blocking effect in the blue light wavelength band although it is inferior to diatomaceous earth. can confirm. For cosmetics containing 5% by weight of composite powder for simultaneous blocking of infrared light and blue light (Production Example 2), cosmetics containing only 5% by weight of zinc oxide (Comparative Example 2) or cosmetics containing only 5% by weight of diatomaceous earth (Comparative Example) The blue light blocking effect was more remarkable than 3). Considering that the zinc oxide contained in substantially 5% by weight of the composite powder is 4.36% by weight and that the diatomaceous earth is 0.64% by weight (Zn: Si molar ratio 1: 0.20), the composite powder based on the blue light blocking rate of 100% of the zinc oxide simple component The blue light blocking rate of 761.34%, the composite powder has a significant blue light blocking effect of about 7.6 times that of zinc oxide, the blue light blocking rate of 1069.84% of the composite powder based on 100% blue light blocking rate of simple diatomaceous earth, There is a significant blue light blocking effect about 10 times that of diatomaceous earth.

As a result, it was confirmed that the blocking ability of the composite powder is superior to that of zinc oxide or diatomaceous earth simple components in the blue light wavelength range, which is considered to be a characteristic effect of the zinc oxide composite powder coated with diatomaceous earth.

Example 3-3. Check for skin irritation

Comparative Example and Preparation Example A skin irritation patch test (KAWAI'S method) was performed with a total of seven cosmetic compositions. Specifically, the sample was immersed in a standard cotton cloth (KS K 0905) and used as a test piece, and the test piece was directly attached to the forearm of the arm for 24 hours for 20 healthy adults. After removal of the patch, items of erythema, edema, blisters, and papules were visually judged to calculate the area and number of stimuli. In the case of area, 5 mm <2> area was computed as 1 point. The results of the calculations were compared with the comparative example (blank) and determined as four steps of negative, quasi-negative, quasi-positive and positive as Table 9 below.

Criteria voice Irritation index of test piece-Irritation index of comparative example 1 (blank) = 0 Quasi voice Irritation index of test piece-Irritation index of comparative example 1 (blank) = 1 ~ 2 Semi-positive Stimulus Index of Specimen-Stimulus Index of Comparative Example 1 (Blank) = 3 positivity Irritation index of test piece-Irritation index of Comparative Example 1 (blank) ≥ 4 * If you see erythema, edema, blisters and papules with the naked eye, it is judged as a positive reaction unconditionally.

As a result of the test, Production Examples 1 to 3 were all determined to be negative. Therefore, the composite powder of the present invention is determined to be safe for the skin to be used as a cosmetic composition.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention. It is obvious that it can be carried out by remodeling.

Claims (17)

(a) ultrasonically pretreating metal ions to disperse the particles;
(b) adding (a) to 80 ° C. or more and adding diatomaceous earth and reacting for 2 hours or more;
(c) washing (b) with distilled water to remove impurities and salts; And
(d) drying the (c); a method for producing a diatomaceous earth coated zinc oxide composite powder consisting of,
The metal ion in the step (a) is characterized in that the zinc oxide,
Diatomaceous earth in the step (b) is characterized in that the "molar ratio of zinc oxide: diatomaceous earth is 1: 0.175 to 1: 0.225" is added,
Step (b) is characterized in that the reaction with an acid while maintaining the pH to 5.5 to 6.5,
The acid is characterized in that sulfuric acid,
The composite powder is characterized in that the infrared, and blue light blocking effect,
The infrared ray is a light source having a wavelength of 760 nm to 1,400 nm,
The blue light is a light source having a wavelength of 401 nm to 500 nm, a method for producing a diatomaceous earth coated zinc oxide composite powder.
The method of claim 1,
The zinc oxide is characterized in that the diameter of the particle size of 0.5 ㎛ to 2.0 ㎛, diatomaceous earth coated zinc oxide composite powder manufacturing method.
The method of claim 1,
The zinc oxide is characterized in that the zinc oxide of the Urgite structure, a diatomaceous earth coated zinc oxide composite powder production method.
The method of claim 1,
The diatomaceous earth is characterized in that the diameter of the particle size of 50 nm to 1,000 nm, method for producing a diatomaceous earth coated zinc oxide composite powder.
The method of claim 1,
The diatomaceous earth is characterized in that the specific surface area of 10 m 2 / g to 500 m 2 / g, diatomaceous earth coated zinc oxide composite powder.
The method of claim 1,
The diatomaceous earth is characterized in that the oil absorption amount of 100 cc / 100g to 1,000 cc / 100g, diatomaceous earth coated zinc oxide composite powder.
The method of claim 1,
The diatomaceous earth is characterized in that the specific gravity of the hollow 5 vol% to 50 vol%, diatomaceous earth coated zinc oxide composite powder manufacturing method.
A diatomaceous earth coated zinc oxide composite powder prepared by the method of claim 1.
delete delete delete A cosmetic composition comprising the diatomaceous earth coated zinc oxide composite powder of claim 8.
The method of claim 12,
The cosmetic composition is characterized in that the composite powder is contained in 5% by weight to 20% by weight, cosmetic composition.
delete delete delete The method of claim 12,
The cosmetic composition is characterized in that the water-in-oil type solution suspension, oil-in-water type solution suspension, emulsion, paste, gel, cream, lotion, powder, oil, stick, balm, or spray formulation.

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