JP2014189553A - Wet forming color cosmetic containing organic ultraviolet blocking agent deposited on hydrophobic-treated porous silica and method for preparing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wet forming color cosmetic containing an organic ultraviolet blocking agent deposited on hydrophobic-treated porous silica and a method for preparing the same.SOLUTION: A wet forming color cosmetic containing an organic ultraviolet blocking agent deposited on hydrophobic-treated porous silica is obtained by hydrophobic treatment of the surface of the porous silica by silylation followed by the deposition of the organic ultraviolet blocking agent. Hydrophobic treatment of the surface of the porous silica can stabilize the deposited organic ultraviolet blocking agent and, when the organic ultraviolet blocking agent is dispersed with volatile solvents and dried for producing the wet forming color cosmetic, elimination of the organic ultraviolet blocking agent to the outside of the porous silica can be prevented and the stability of formulation can be ensured.

Description

  The present invention relates to a wet-molded color cosmetic capable of stably depositing an organic ultraviolet blocking agent on porous silica and enhancing the stability of forming, and a method for producing the same.

  Recently, skin diseases caused by ultraviolet rays have increased in Japan. Especially, it has been found that 20-30 young people have increased the number of spots and skin cancer patients, and the importance of ultraviolet ray blocking is emerging. In particular, men tend to be indifferent to UV protection despite a lot of outdoor activities. According to a survey by the Korean Dermatological Association, 20-30 male skin cancer patients have increased 5 times compared to 10 years ago. ing. In this way, ultraviolet rays are closely related not only to beauty but also to health.

  Sun rays are largely classified into visible rays, infrared rays, and ultraviolet rays according to the length of the wavelength. Among them, ultraviolet rays are shorter than visible violet rays and are called UV (Ultraviolet), and are divided into three regions. Ultraviolet rays A (UV-A) is the main cause of skin darkening and penetrates into the dermis of the skin, obstructing the skin's regenerative function, creating wrinkles and promoting aging. Ultraviolet B (UV-B) has a shorter wavelength than UV-A and does not penetrate into the dermis, but thickens the stratum corneum and dries the skin, roughens the skin surface and produces melanin pigments to make spots and freckles. It also causes inflammation like erythema, burns, and blisters. Although UV C (UV-C) has the shortest wavelength, it is the strongest UV and induces skin cancer, but until now it was completely blocked by the ozone layer and was not very conscious of it, but the ozone layer due to recent environmental pollution Has been destroyed and can not be relieved. It has been found that such ultraviolet rays affect not only the skin but also the visual acuity and the body's immune function, and overexposure is bad for health.

  The UV blocking agents currently used in the cosmetic industry are broadly divided into organic UV blocking agents and inorganic UV blocking agents. Organic UV-blockers are also called scientific UV-blockers, and they have good growth and good usability on the principle that they absorb UV rays into the skin and cause chemical reactions to decompose them. Must be re-applied and absorbed by the skin itself to cause irritation or product of photoreaction and may cause irritant contact dermatitis on sensitive skin, most organic UV blockers used There are many limitations. Inorganic UV blocking agents are also called physical UV blocking agents, and are based on the principle of forming a film on the skin surface to reflect solar radiation. The skin is less irritating and safe, but induces discomfort with a sticky feeling every time it is applied. However, it causes white turbidity on the skin and causes the skin to become white. Inorganic UV screening agents have been studied for the purpose of adjusting the size of primary particles and using composites using surface properties, silica, and other powders to make them comfortable to use and avoid clouding. However, organic UV screening agents have only a small part of the primary synthesis research, and there is no research through secondary nature. Many researches are limited to the technique of depositing using porous powder (KR 10-1221190 B1, KR 10-1175623 B1).

  Prior art 1 (KR 10-1221190 B1) relates to a cosmetic preparation for ultraviolet blocking containing a medium-sized air-borne inorganic composite powder deposited with an air-air metal oxide and an organic ultraviolet blocking agent. Prior art 2 (KR 10-1175623 B1) relates to a method for producing a hollow spherical silica composite pigment possessed by an organic ultraviolet blocking agent and a cosmetic preparation for ultraviolet blocking containing the same. The above technologies can be used only for dry powder molding, and wet molding color cosmetic aids using volatile solvents are powders using volatile solvents (alcohols, parapines, water, etc.) as solvents. After the shape is dispersed, a volatile solvent is sucked and dried to produce a finished product. The wet molding color cosmetics aid is dispersed in the powder state with a volatile solvent in the manufacturing process, but the UV blocking agent deposited on the porous silica in this state is released to the outside and the dosage form becomes unstable. The UV blocking effect decreases rapidly.

  Therefore, when manufacturing wet-molded color cosmetics using porous silica with an organic UV blocking agent as described above, the organic UV blocking deposited on the porous silica while the powder state is dispersed in the volatile solvent. The agent cannot be stabilized inside the silica air and is discharged outside.

  Numerous papers and patent documents are referenced throughout this specification and their citations are displayed. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety, and the level of the technical field to which the present invention belongs and the contents of the present invention are explained more clearly.

Korean Patent 10-1221190-B1 Korean Patent 10-1175623-B1

  The present inventors have been able to use porous silica deposited with an organic ultraviolet blocking agent only in a dry powder dosage form, and in a wet molding color cosmetic aid using a volatile solvent, the volatile solvent is powdered. In order to solve this problem, it was discovered that the organic ultraviolet blocking agent deposited on the porous silica when dispersed was released to the outside and could not be used. As a result, a wet molding color cosmetic containing an organic ultraviolet blocking agent deposited on hydrophobic treated porous silica and a method for producing the same were completed.

  In the present invention, the hydrophobic functional group of Hexamethyldisilazane, 1,1,3,3-Tetramethyl-1, 3-diphenyldisilazane, or N, N′-Bis (trimethylsilyl) urea, which is a hydrophobic substance used in the silylation reaction. When an organic UV-blocking agent is deposited after attaching a certain methyl group (-CH3) to the silica air surface, the phenomenon of solidification from the inside of the silica air space to the previous concrete is promoted, and wet molding color tone is improved. It was confirmed that the volatile solvent used in cosmetics and the organic UV-blocking agent during dispersion and drying were stabilized without being released to the outside.

  Accordingly, it is an object of the present invention to provide a wet-molded color cosmetic containing an organic ultraviolet blocking agent deposited on hydrophobic-treated porous silica and a method for producing the same.

  The present invention provides a wet molding color cosmetic comprising an organic ultraviolet light blocking agent deposited on porous silica that has been subjected to hydrophobic treatment through a silylation reaction.

The silylation reaction uses at least one silylation substance selected from Hexamethyldisilazane, 1,1,3,3-Tetramethyl-1, 3-diphenyldisilazane, and N, N′-Bis (trimethylsilyl) urea. It is to be carried out.
At this time, the silylation material may be used in an amount of 0.1 to 10.0 parts by weight with respect to 100 parts by weight of the total weight of the porous silica.

  The above organic ultraviolet ray blocking agents are ethyl hexyl methoxycinnamate, ethyl hexyl silicate, oxyldimethyl para-aminobenzoxane, butyl methoxy dibenzoyl methane, oxyl meto cincinnamate, octyl salicylate, octocrylylene, butyl methoxy dibenzoyl methane, oxybenzone, It may contain at least one selected from oxyltriazone, menthyl anthranilate, 3,4-methyl benzylidene kaemper and bis-ethyloxy penormethoxyphenyl triazine.

The organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica may include 20 to 100 parts by weight of the organic ultraviolet blocking agent with respect to 100 parts by weight of the total weight of the hydrophobic treated porous silica.
The wet molding color cosmetic may include a powder component and a binder component containing an organic ultraviolet blocking agent deposited on hydrophobic treated porous silica.

  The wet molding color cosmetic may include an organic UV blocking agent deposited on hydrophobic treated porous silica in an amount of 0.1 to 10.0% by weight based on the amount of the organic UV blocking agent.

  The present invention comprises hydrophobizing the surface of porous silica through silylation; depositing an organic UV-blocking agent on the hydrophobic treated porous silica obtained from the previous step; and hydrophobized treatment obtained from the previous step. A powder component containing an organic ultraviolet blocking agent deposited on porous silica and a binder component are mixed and then pulverized to obtain a pulverized mixture, and the pulverized mixture is dispersed in a volatile solvent composed of ethanol, water, and glycerin. And then, after the slurry is filled in a predetermined amount on the molding machine, the molded product is dried to remove the volatile solvent, and a method for producing a wet molded color cosmetic is provided.

  The present invention relates to a wet-molded color cosmetic comprising the surface of a porous silica hydrophobized through a silylation reaction, and an organic ultraviolet blocking agent is stably deposited on the hydrophobic treated porous silica. And a method for manufacturing the same. The wet molding color cosmetic containing the organic UV blocking agent deposited on the hydrophobic treated porous silica is free from the organic UV blocking agent when dispersed with the volatile solvent used for manufacturing the wet molding coloring cosmetic. Improves the phenomenon of solidification inside and prevents it from being lost outside, ensuring the stability of molding.

FIG. 1 is a photograph of a field emission scanning microscope (Leo Supra 55, Germany) of porous silica. (A) Porous silica, (b) Hydrophobic-treated porous silica, and (c) Porous silica deposited with an organic ultraviolet blocking agent. FIG. 2 is a graph showing a nitrogen isotherm adsorption line and an air-air distribution curve of porous silica. (A) Porous silica, (b) Hydrophobic-treated porous silica, and (c) Porous silica deposited with an organic ultraviolet blocking agent. FIG. 3 is a graph showing the thermogravimetric change of porous silica due to temperature change. (A) Porous silica, (b) Hydrophobic-treated porous silica, and (c) Porous silica deposited with an organic ultraviolet blocking agent.

  The present invention provides a wet molding color cosmetic comprising an organic ultraviolet blocking agent deposited on porous silica that has been subjected to hydrophobic treatment through a silylation reaction.

According to a preferred embodiment of the present invention, silylation materials for hydrophobizing the surface of porous silica are Hexamethyldisilazane, 1,1,3,3-Tetramethyl-1,3-diphenyldisilazane and N, N′-Bis (trimethylsilyl) At least one selected from urea can be used.
Table 1 shows chemical structures of silylation substances that can be used for the silylation reaction.

  In the case of depositing an organic ultraviolet blocking agent on porous silica treated with such a silylation material, methyl (-CH3), which is the hydrophobic action of the hydrophobized material, is attached to the silica surface, and the bulb body and the surrounding area. It reduces the interaction with the surface of the shape and enhances the phenomenon of solidification between the bulbs from the inside of the air and stabilizes the organic ultraviolet blocking agent in the porous silica.

  As described above, the organic ultraviolet blocking agent is stably deposited on the porous silica subjected to the hydrophobic treatment, so that the porous silica can be dispersed from the porous silica even after being dispersed and dried with the volatile organic solvent during the process of manufacturing the wet-molded color cosmetic. The amount of the organic ultraviolet blocking agent is intentionally left in the wet molded color cosmetic that is finally obtained without leakage of the organic ultraviolet blocking agent. In other words, the stability of forming can be improved through wet forming affirmation.

  According to a preferred embodiment of the present invention, the hydrophobizing material used for the silylation reaction may be 0.1 to 10.0 parts by weight with respect to 100 parts by weight of the total weight of the porous silica. When the hydrophobized substance is contained in an amount of less than 0.1 parts by weight with respect to 100 parts by weight of porous silica, the silylation reaction on the surface of the porous silica is insignificant, and the hydrophobizing properties do not appear. An amount more than necessary for the silylation reaction is added, and the addition of 10.0 parts by weight or more is meaningless.

  According to a preferred embodiment of the present invention, the organic UV-blocking agent is ethylhexylmethoxycinnamate, ethylhexylsilicate, oxyldimethylpara-aminobenzoxane, butylmethoxydibenzoylmethane, oxylmetocicinnamate, octylsalicylate, octocrylene, It may be at least one selected from among butyl methoxydibenzoylmethane, oxybenzone, oxyltriazone, menthyl anthranilate, 3,4-methylbenzylidene kemper and bis-ethyloxypenolmethoxyphenyl triazine. Such organic ultraviolet blocking agents are easily destroyed by heat, an organic solvent, or the surrounding environment, and need to be stabilized, and can be said to be consistent with the intention of the present invention.

  According to a preferred embodiment of the present invention, the organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica is 20 to 100 wt% of the organic ultraviolet blocking agent with respect to 100 parts by weight of the total weight of the hydrophobic treated porous silica. Part may be included. When the organic UV blocker contains less than 20 parts by weight with respect to 100 parts by weight of the porous silica subjected to the hydrophobic treatment, the UV blocking effect is insignificant when applied to wet molding color cosmetics, and exceeds 100 parts by weight. Compared to the air volume of porous silica (1.14 cc / g), the amount of air inside the air may not be able to enter due to the deposit of the organic UV blocking agent.

  According to a preferred embodiment of the present invention, the wet-molded color cosmetic composition may include a powder component and a binder component as the component containing the organic ultraviolet blocking agent deposited on the hydrophobic-treated porous silica. The volatile solvent prepared by mixing the above water and glycerin can be used after being dried and removed in the final stage of producing a wet color tone cosmetic. There are no particular limitations on the powder component and binder component other than the organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica, and it is of course possible to use those contained in normal color cosmetics. .

  According to a preferred embodiment of the present invention, the wet-molded color cosmetic may include an organic ultraviolet blocking agent deposited on hydrophobic treated porous silica in an amount of 0.1 to 10.0% by weight based on the amount of the organic ultraviolet blocking agent. When the organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica is contained in an amount of less than 0.1% by weight based on the amount of the organic ultraviolet blocking agent, the ultraviolet blocking effect is insignificant, and when it exceeds 10.0% by weight Formability and quality of wet molding color cosmetic products are reduced.

  To achieve the above object, the present invention comprises hydrophobizing the surface of porous silica through silylation; depositing an organic ultraviolet blocking agent on the hydrophobic treated porous silica; and the hydrophobic treated porosity. After mixing a powder component and a binder component containing an organic ultraviolet blocking agent deposited on silica and pulverizing to obtain a pulverized mixture, the pulverized mixture is dispersed in a volatile solvent composed of ethanol, water and glycerin to form a slurry. After the production, a fixed amount of the slurry is filled on the shaper, and then the shaped product is dried to remove the volatile solvent. In this way, the wet molding color cosmetic manufacturing process can remove the solvent by dispersing and drying the pulverized mixture of the powder component and the binder component in a volatile solvent, and particularly the removal of the volatile solvent is accompanied by a severe process such as suction. Yes. If the organic UV blocker is not deposited in a stable phase in the porous silica, it can be lost during such a process. However, the organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica is stabilized, and the stability can be ensured even in such a shaping.

  Hereinafter, the present invention will be described in more detail through examples. These examples are only for explaining the present invention more specifically, and it is normal knowledge in the technical field to which the present invention belongs that the scope of the present invention is not limited to these examples by the gist of the present invention. It is obvious to those who have

[Example] Manufacture of wet-molded color cosmetics containing organic ultraviolet blocking agent deposited on hydrophobic treated porous silica
Hydrophobic process of porous silica through silylation

Porous silica (SILNOS 350, ABC NANOTECH) 3.0 g is a hydrophobized substance hexamethyldisilazane (99%, Fluka), 1,1,3,3-Tetramethyl-1,3-diphenyldisilazane (99%, Fluka) 0.3 G and N, N′-Bis (trimethylsilyl) urea (99%, Fluka) 0.3 g and n-hexane (aldrich) 150 mL were mixed and refluxed with heating, and then subjected to a hydrophobic treatment through a filtering process. Porous silica was obtained.
Specific subsidies for hydrophobic treatment of porous silica are shown in Table 2.

Porous silica that was not hydrophobically treated (target sphere 1), porous silica that was hydrophobically treated with hexamethyldisilazane (Example 1), and hydrophobically treated with 1,1,3,3-Tetramethyl-1,3-diphenyldisilazane Porous silica (Example 2) and porous silica treated with N, N′-Bis (trimethylsilyl) urea (Example 3) were obtained.
The process of depositing organic UV screening agents

  10 g of each of the hydrophobic treated porous silica and non-hydrophobic treated porous silica produced from the above examples were added with 4 g of ethylhexyl methoxycinnamate, which was a component of an organic ultraviolet ray blocking agent heated at 80 ° C. Deposited using the law (paper: “Chemical communications” published by the British Chemical Society, 2009, No. 6, pp. 650-652).

Non-hydrophobic porous silica deposited with ethylhexyl methoxycinnamate, a component of organic UV blocker (Control Group 2), and ethylhexylmethoxycinnamate, a component of organic UV blocker, deposited with “Hexamethyldisilazane Hydrophobic treated porous silica (Example 4), and “1,1,3,3-Tetramethyl-1,3-diphenyldisilazane” deposited with ethylhexyl methoxycinnamate, a component of an organic UV blocker Porous silica treated with `` N, N′-Bis (trimethylsilyl) urea '' deposited with treated porous silica (Example 5) and ethylhexyl methoxycinnamate, a component of organic UV blocker (implemented) Example 6) was obtained.
Manufacture of wet molding color cosmetics Wet molding color cosmetics were manufactured according to the following steps.
(1) Powder components (raw materials 1 to 14) described in Table 4 below were mixed.
(2) After mixing the binder components (raw materials 15 to 19) described in Table 4, the mixture was heated at 80 ° C.
(3) After spraying the above (2) into the above (1), it was pulverized twice to produce a powder.

(4) The powder produced in (3) was added to the volatile solvent (raw materials 1 to 3) shown in Table 5 and dispersed for about 10 minutes to produce a slurry. After a certain amount of the slurry was filled on the molding machine, about 40 to 50% of the volatile solvent was removed by applying a molding cloth and dried from 60 ° C. for 12 hours to completely remove the volatile solvent.
Experimental example 1.Measured with a field emission scanning microscope

The change in the particle size and the outer shape of the porous silica prepared from the present invention and the porous silica on which the organic ultraviolet blocking agent was deposited were compared with the general porous silica not subjected to the hydrophobic treatment. (A) Porous silica was selected in Control Group 1, (b) Hydrophobic-treated porous silica was selected in Example 1, and (c) Porous silica on which an organic ultraviolet blocking agent was deposited was selected in Example 4. Porous silica was subjected to field emission scanning microscopy (Leo Supra 55,
Germany).

As a result, as can be seen in FIG. 1, the particle size distribution is about 10 μm, and changes in the particle size of the porous silica with hydrophobic treatment and the porous silica with organic UV light blocking agent deposited occur compared to the porous silica. It was also confirmed that the external shape was maintained.
Example 2: Measurement of specific surface area and air volume change

Nitrogen isotherm obtained from liquid nitrogen temperature of (a) porous silica selected from the above experimental example 1, (b) porous silica subjected to hydrophobic treatment and (c) porous silica deposited with an organic ultraviolet blocking agent Changes in specific surface area and air-air volume were confirmed by measuring adsorption lines and air-air distribution curves. Utilizing MicroStar's TriStar, the form of the isothermal adsorption line is an extended form of type-IV, which is a form that typically appears in the HOLLOW type (see FIG. 2). The specific surface area and air / air volume values were calculated based on the following Formula 1 Brunauer-Emmett-Teller method, and the results are shown in Table 6 below.

As a result, the value of the specific surface area obtained through the Brunauer-Emmett-Teller is 175 m2 / g
> 144m2 / g> 63m2 / g, it decreases sharply, and air deposition is 1.14cc / g>
By confirming that it decreased with 1.12 cc / g> 0.56 cc / g, it was indirectly confirmed that the hydrophobic treatment of porous silica and the deposition of organic ultraviolet blocking agent were made.
Experimental example 3.Thermogravimetric change due to temperature change

The thermogravimetric change due to temperature change of (a) porous silica selected from the above experimental example 1, (b) porous silica subjected to hydrophobic treatment and (c) porous silica on which an organic ultraviolet ray blocking agent is deposited is time difference heat. Gravimetric analyzer (Seiko
TG / DTA 7300, JAPAN). However, (c) in the case of porous silica on which an organic ultraviolet blocking agent was deposited, a product obtained by depositing 2.3 g of an organic ultraviolet blocking agent on 10 g of hydrophobic treated porous silica was used. As a result, as shown in FIG. 3, the porous silica treated with hydrophobic treatment has a mass loss of 2.5% by weight at 300 ° C. or higher, and the silica with the organic UV blocking agent deposited has a mass reduction of 20% by weight. It was confirmed that Hexamethyldisilazane applied to porous silica for hydrophobization treatment and ethylhexylmethoxycinnamate applied to porous silica with organic UV blocking agent were deposited.
Experimental example 4. Content analysis of organic UV-blocking agent deposited on porous silica

In wet-type color cosmetics obtained from Examples 7 to 9 and Comparative Example 1, the content of the organic UV-blocking agent was analyzed through high performance liquid chromatography analysis (HPLC), and wet molding based on the following formula 2. The maintenance rate of the organic ultraviolet blocking agent was calculated according to the results, and the results are shown in Table 7 below.

  As a result, when the powdered form was dispersed in a volatile solvent to produce a wet-molded color cosmetic, as shown in Table 7, in the case of Example 7, in the case of Example 7, the organic ultraviolet light blocked by hydrophobic treated porous silica was blocked. Ethylhexyl methoxycinnamate, an agent, showed a maintenance rate of 95% or more even after the wet molding process. Example 8 showed a maintenance rate of 92% and Example 9 showed a maintenance rate of 94%. However, in the case of Comparative Example 1, only 35% of ethylhexyl methoxycinnamate, which is an organic ultraviolet blocking agent that was volume-stored in porous silica that was not subjected to hydrophobic treatment, remained during the wet molding process.

  As can be seen from the experimental results, wet molded color cosmetics are manufactured using organic UV blocking agent deposited on hydrophobic treated porous silica and organic UV blocking agent deposited on non-hydrophobic treated porous silica. As a result of analyzing the content of the organic ultraviolet blocking agent, when the solvent is included in the organic ultraviolet blocking agent volume in the hydrophobic treated porous silica, the amount of the organic ultraviolet blocking agent is set to the initial input amount based on the amount of the organic ultraviolet blocking agent. More than 90% remains, but when including an organic UV blocking agent in porous silica that has not been subjected to hydrophobic treatment, only 35% remains compared to the initial charge based on the amount of the organic UV blocking agent. .

From these, the wet molding color cosmetics manufactured from the present invention minimizes the organic UV blocking agent volume in the porous silica during the manufacturing process, thereby minimizing the organic UV blocking through the wet molding process. It can be confirmed that the stability of the molding using the agent can be secured.

Claims (8)

  Wet molded color cosmetics containing an organic UV blocking agent deposited on porous silica that has been hydrophobically treated through a silylation reaction. In paragraph 1,
The silylation reaction was performed using a silylation substance selected from Hexamethyldisilazane, 1,1,3,3-Tetramethyl-1,3-diphenyldisilazane and N, N′-Bis (trimethylsilyl) urea Wet molded color cosmetics. In Section 2,
The wet molding color cosmetic characterized in that the silylation material is used in an amount of 0.1 to 10.0 parts by weight based on 100 parts by weight of the total weight of the porous silica. In paragraph 1,
Organic UV blockers are ethyl hexyl methoxycinnamate, ethyl hexyl silicate, oxyldimethyl para-aminobenzoxane, butyl methoxydibenzoyl methane, oxyl meto cincinnamate, octyl salicylate, octocrylylene, butyl methoxy dibenzoyl methane, oxybenzone, oxyl A wet-molded color cosmetic comprising at least one selected from triazone, menthylanthranylate, 3,4-methylbenzylidenekemper and bis-ethyloxypenolmethoxyphenyl triazine. In paragraph 1,
The organic ultraviolet blocking agent deposited on the hydrophobic treated porous silica contains 20 to 100 parts by weight of the organic ultraviolet blocking agent with respect to 100 parts by weight of the total weight of the hydrophobic treated porous silica. Tone cosmetics. In paragraph 1,
The wet molding color cosmetic comprises a powder component containing an organic ultraviolet blocking agent and a binder component deposited on hydrophobic treated porous silica, and a wet molding color cosmetic. In paragraph 1 or paragraph 5,
The wet molding color cosmetic comprises an organic ultraviolet blocking agent deposited on hydrophobic treated porous silica in an amount of 0.1 to 10.0% by weight based on the amount of the organic ultraviolet blocking agent. Hydrophobizing the surface of the porous silica through silylation; depositing an organic UV-blocking agent on the hydrophobic treated porous silica obtained from the previous step; and hydrophobic treated porosity obtained from the previous step A powder component containing an organic ultraviolet blocking agent deposited on silica and a binder component are mixed and then pulverized to obtain a pulverized mixture. The pulverized mixture is dispersed in a volatile solvent composed of ethanol, water, and glycerin to produce a slurry. Then, after filling a certain amount of the slurry on the molding machine, the molded product is dried to remove the volatile solvent.