KR102157736B1 - Photochromic powder and manufacturing method for Photochromic powder - Google Patents

Abstract

The present invention relates to a method of manufacturing a vision powder and a vision powder, and more specifically, it is possible to manufacture a raw material for a vision powder that changes color when exposed to ultraviolet rays without using components harmful to the human body, and at the same time, a conventional dye type The present invention relates to a method of manufacturing a vision powder and a powder that is manufactured in a powder type and can be freely applied and used in any kind of cosmetic formulation.

Description

Photochromic powder and manufacturing method for Photochromic powder}

The present invention relates to a method of manufacturing a vision powder and a vision powder, and more specifically, it is possible to manufacture a raw material for a vision powder that changes color when exposed to ultraviolet rays without using components harmful to the human body, and at the same time, a conventional dye type The present invention relates to a method of manufacturing a vision powder and a powder that is manufactured in a powder type and can be freely applied and used in any kind of cosmetic formulation.

A visual raw material is a substance that changes its molecular structure by absorbing light energy of a specific wavelength, and is a compound whose color displayed outside changes in this state. Therefore, when the energy applied to this material is stopped, it has the property of reversibly returning to the previous molecular structure.

Specifically, when the absorption amount of ultraviolet light increases, the ring structure in the molecule becomes a conjugation structure, and the wavelength of the reflected light changes to change the color. On the contrary, when the absorption amount of ultraviolet rays decreases, the original color becomes a ring structure again. It has a reversible characteristic to return to.

Such shigwang raw materials can generally be applied to both paint inks and plastics. Recently, they are used in various fields such as toys including dolls, sunglasses, crayons, hair clips, belts, manicures, as well as New Year's cards, stickers, and T-shirts. Being tried.

However, the conventional light source material used as described above is mainly a diarylethene based light source material, which does not dissolve without an organic solvent, contains a lot of ingredients harmful to the human body, and does not react to natural vegetable ingredients. It is not being used.

Accordingly, there is a demand for the development of a new optical raw material that can be used as a cosmetic raw material because it is made of a combination of materials that are not harmful to the human body and has excellent reactivity by ultraviolet rays.

1. Korean Patent Application Publication No. 10-2011-0120351 (published on Nov. 03, 2011)

The present invention was conceived to solve the problems of the prior art as described above, and an object of the present invention is to change to a different color in response to ultraviolet rays while being composed of a combination of ingredients that are not harmful to the human body. It is intended to provide a method of manufacturing a shining powder and a shining powder that can be used as a raw material for various cosmetics that can be used not only for skin, but also for lips, hair, and nails due to excellent reversible properties that return to color.

In addition, the present invention is to provide a method of manufacturing a vision powder and a vision powder that can be used freely in any cosmetic formulation, as well as excellent stability by manufacturing a light-emitting material reacting to ultraviolet light in a powder type and simultaneously microencapsulating it. have.

Vision powder according to the present invention for achieving the above objects,

Microencapsulated in which the raw material of the shining powder including xylylphenylethane, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate and reversible photochromic powder is surrounded by a polyoxymethylene melamine-styrene copolymer As a light-emitting powder, the weight ratio of styrene:polyoxymethylene melamine of the polyoxymethylene melamine-styrene copolymer is in the range of 1:6 to 6:1.

At this time, the reversible photochromic powder is trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine, indolinotrimethylspiroindolinenaphthooxazine, trimethylindolinopiperidinilspironaphthooxazine, and diphenylnaphthopyran It is characterized in that any one of.

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In addition, the size of the microencapsulated light powder particles is characterized in that the fine particles of 1 to 10 micrometers.

On the other hand, the manufacturing method of the shining powder according to the present invention,

(a) adding and mixing xylylphenylethane, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate, and reversible photochromic powder; (b) a material mixing step in which acetone is added and mixed with the material introduced in the material input step, and the weight ratio of the added material and acetone is in the range of 2:1 to 1:2; (c) a microcapsule material input step of injecting a material of microcapsules that surrounds the outside of the raw material for light-emitting powder mixed in the material mixing step; (d) a curing agent input step of introducing a curing agent for curing the microcapsule material; (e) a stirring step of stirring at a high temperature of 100 to 130 degrees to mature the microcapsules into which the curing agent is added, and a aging step of aging to stabilize physical properties; (f) a sterilization and disinfection step of washing the aged microcapsules with ethanol after the aging step; (g) a step of producing a shining powder in which the washed microcapsules are dried and pulverized into fine particles using a stirrer; And (h) a final inspection step of finally checking the cleaning state and glossiness of the prepared shining powder. It characterized in that made, including.

At this time, the reversible photochromic powder is trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine, indolinotrimethylspiroindolinenaphthooxazine, trimethylindolinopiperidinilspironaphthooxazine, and diphenylnaphthopyran It is characterized in that any one of.

In addition, the microcapsule material introduced in step (c) is a polyoxymethylene melamine-styrene copolymer, and the weight ratio of the styrene:polyoxymethylene melamine of the polyoxymethylene melamine-styrene copolymer is 1:6 to 6:1 It is characterized in that the range of.

In addition, the light-emitting powder prepared in step (g) is characterized in that the microencapsulated microparticles of 1 to 10 micrometers.

And, in the step (a), xylylphenylethane 47 to 49 parts by weight, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate 13 to 23 parts by weight, and reversible photochromic powder 2 to 4 parts by weight It is characterized by injecting.

In addition, the curing agent introduced in step (d) is characterized in that stearic acid (stearic acid).

According to the present invention, it is made of a combination of ingredients that are not harmful to the human body, but changes to a different color in response to ultraviolet rays, and has excellent reversible properties that return to the original color when ultraviolet rays are blocked. It has an excellent effect of being able to be used as a raw material for various cosmetics that can be used for the like.

In addition, according to the present invention, since the light-emitting material reacting to ultraviolet rays is prepared in a powder type and at the same time microencapsulated, not only has excellent stability, but also can be easily applied to aqueous and natural ingredients, so that it can be used freely in any cosmetic formulation. .

1 is a view showing a light-visible powder according to the present invention.
Figure 2 is a flow chart showing a method of manufacturing a sight powder according to the present invention.
Figure 3 (a), (b) is a view showing the color change of the lip balm manufactured using the light powder according to the present invention.
Figure 4 (a), (b) is a view showing the color change of the lipstick manufactured using the light powder according to the present invention.
Figure 5 (a), (b) is a view showing the color change of the lip gloss and tint prepared by using the light powder according to the present invention.
Figure 6 (a), (b) is a view showing the color change of the hairspray manufactured using the light powder according to the present invention.
7 is a view showing the color change of the nail polish manufactured using the light powder according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the method of manufacturing a vision powder and a vision powder according to the present invention.

1 is a view showing a sight powder according to the present invention, Figure 2 is a flow chart showing a method of manufacturing a sight powder according to the present invention, Figure 3 (a), (b) using the sight powder according to the present invention It is a view showing the color change of the manufactured lip balm, Figure 4 (a), (b) is a view showing the color change of the lipstick manufactured using the light powder according to the present invention, Figure 5 (a), ( b) is a view showing the color change of the lip gloss and tint manufactured using the vision powder according to the present invention, Figure 6 (a), (b) is a hair spray manufactured using the vision powder according to the present invention It is a view showing the color change of, and FIG. 7 is a view showing the color change of the nail polish manufactured using the sight powder according to the present invention.

The present invention makes it possible to manufacture a light source material that changes color when exposed to ultraviolet rays without using ingredients harmful to the human body, and at the same time, it is manufactured in a powder type rather than a conventional dye type, and can be freely applied and used in any kind of cosmetic formulation. It relates to a shining powder and a method of manufacturing the same.

First, the raw materials for the shining powder according to the present invention are xylyl phenylethane, pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, and reversible photochromic. A powder (reversible photochromic powder) is included, and the raw material for the shining powder may further include cosmetic materials such as vitamins, flavors, and natural ingredients.

First, xylylphenylethane is a kind of oil wax, and serves to enhance the color clarity of the raw material for light-emitting powder. That is, the xylylphenylethane can play the role of oil and wax at the same time, and is used as an emulsifier, as well as improving the water resistance and stain resistance of the raw material for light-emitting powder and enhancing the clarity.

The xylylphenylethane is used as much as 47 to 49 parts by weight of the total light powder raw material, and if the content is less than 47 parts by weight, there is a concern that the function of the above-described xylyl phenyl ethane may not be properly exhibited, and the content is 49 parts by weight. If it is exceeded, the content of other ingredients decreases, so that the desired effect does not appear well.

Next, the pentaerythrityltetra-di-t-butylhydroxyhydrocinnamate is used as an antioxidant, and serves to improve durability by preventing the raw material of the shining powder from being deteriorated.

At this time, the pentaerythrityltetra-di-t-butylhydroxyhydrocinnamate may be used in 13 to 23 parts by weight of the total light powder raw material, and if the content is less than 13 parts by weight, the aforementioned durability improvement effect is properly exhibited. There is a concern that the content will not occur, and if the content exceeds 23 parts by weight, the content of other components is lowered, so that the desired effect does not appear well.

Next, the reversible photochromic powder serves to change its color in a place exposed to ultraviolet rays and to return to its original color in a place where ultraviolet rays are blocked. When exposed to, the color changes.

That is, when the reversible photochromic powder is affected by ultraviolet rays (UV), the shape of the photochromic component is released from the twisted form and changes to a balanced form of bright color. The released form absorbs visible light very effectively, and The change reverts back to the inactive or resting state of the molecule when the source of radiation is removed.

The reaction rate of the reversible photochromic powder varies depending on the ambient temperature and chemical structure, and the reaction wavelength is colored in both the normal UV-A and UV-B wavelength ranges, and the color is developed within about 1 second, When UV-A and UV-B are blocked, it returns to its original color within about 20 seconds.

At this time, the reversible photochromic powder may be used in 2 to 4 parts by weight of the total light powder raw material, and if the content is less than 2 parts by weight, there is a concern that the change in color due to exposure to the above-described ultraviolet rays does not appear clearly. In addition, when the content exceeds 4 parts by weight, the proportion of the reversible photochromic powder becomes higher than necessary, and there is a concern that the manufacturing cost may increase.

On the other hand, the reversible photochromic powder is trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine, indolinotrimethylspiroindolinenaphthooxazine, trimethylindolinopiperidinilspironaphthooxazine, and diphenylnaphthopyran Any one or a combination of two or more of them may be used. First, the trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine is obtained from CAS No. It corresponds to 172208-34-3, is yellow in the form of a powder with a melting point of about 140℃, and the color changed by ultraviolet rays is red.

Next, the indolinotrimethylspiroindolinenaphthooxazine is CAS No. It corresponds to 114747-44-3, is yellow in the form of a powder with a melting point of about 160°C, and the color changed by ultraviolet rays is blue. Next, the trimethylindolinopiperidinilspironaphthooxazine was obtained from CAS No. It corresponds to 114747-45-4, is yellow in the form of a powder with a melting point of about 140℃, and the color changed by ultraviolet rays is purple.

Next, the diphenyl naphthopyran is CAS No. It corresponds to 4222-20-2, is white in the form of a powder with a melting point of about 140℃, and the color changed by ultraviolet rays is orange or yellow.

As described above, the above four types of reversible photochromic powders are colored in both UV-A and UV-B wavelength ranges, that is, about 285 nm to 382 nm, and the color development is within about 1 second. When UV rays are blocked, the original color is restored within about 20 to 60 seconds.

In addition, all four types of reversible photochromic powders are harmless to the human body and are well soluble in water, so they can be easily synthesized and used in any formulation of cosmetics, and because they are mixed with colored general ingredients, color change from colorless to colored. In addition, it is possible to change color from color to color, so that a variety of color changes can be expressed.

In addition, the shining powder may further include a plasticizer and a fatty acid, and the fatty acid may be palmitic acid, oleic acid, linoleic acid, linnolenic acid, or the like, and 1,3-butanediol may be used as the plasticizer. The plasticizer is used for swelling of the shell material polyoxymethylene melamine-styrene copolymer, and is used in a range of 0.1 to 1 parts by weight that does not impair the physical properties, and fatty acids improve the physical properties of the polyoxymethylene melamine-styrene copolymer. It is used for, and these ranges of use are preferably 0.1 to 1 part by weight.

Polyoxymethylene melamine-styrene copolymer is used as a material for the microcapsule, which is a material surrounding the light-emitting powder, which is a film forming agent, that is, serves as a shell surrounding the light-emitting material, the polyoxymethylene. The melamine-styrene copolymer preferably has a weight ratio of styrene:polyoxymethylene melamine in the range of 1:6 to 6:1. More preferably, it has a range of 1: 6 to 1: 2.

Outside the range of the weight ratio of the polyoxymethylene melamine-styrene copolymer, the mixing and synthesis effect decreases, and within the range of the weight ratio of the polyoxymethylene melamine-styrene copolymer, the color change caused by exposure to ultraviolet rays appears more intense. It plays a role of allowing the polyoxymethylene melamine-styrene copolymer to change in color too easily outside the weight ratio range of the polyoxymethylene melamine-styrene copolymer, and thus there is a concern that color distinction may not be clearly displayed.

More preferably, the polyoxymethylene melamine is 19 to 27 parts by weight, and the content of styrene is preferably 5 to 7 parts by weight.

On the other hand, as shown in Figure 2, the method of manufacturing a light-emitting powder according to the present invention is a material input step (S10), a material mixing step (S20), a microcapsule material input step (S30), a hardener input step (S40), and agitation. It comprises a step (S50) and a aging step (S60), a sterilization and disinfection step (S70), a light powder manufacturing step (S80) and a final inspection step (S90).

In more detail, the material input step (S10) relates to a step of mixing by introducing a material used in the manufacture of a raw material for light-emitting powder, that is, oil wax, antioxidant, and reversible photochromic powder in a container or agitator. Including xylylphenylethane, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate, and reversible photochromic powder are added and mixed. As these are the same as described above, detailed descriptions thereof will be omitted. I will do it.

Next, the material mixing step (S20) relates to a step of mixing the materials by adding a solvent to the input material, and acetone is used as the solvent. At this time, the acetone serves to smoothly melt and mix the input materials, and the weight equal to the total weight of the materials introduced in the material input step (S10), that is, the weight ratio of the input materials and acetone is 2:1 to 1:2 By adding and mixing so as to achieve a ratio of, a raw material for light-emitting powder is prepared.

Next, the capsule material input step (S30) relates to a step of injecting a material of microcapsules that surrounds the outside of the light powder raw material mixed in the material mixing step (S20), wherein the microcapsules are 1 to 10 μm or less in size. As shown in Fig. 1, the ultra-fine particles surround the exterior of the viewing light material, thereby protecting the viewing material from unstable substances such as external environment, heat, and PH, and maintaining the function of the viewing material. In addition, the material of the microcapsule is prepared using a polyoxymethylene melamine-styrene copolymer.

Next, the step of introducing the curing agent (S40) relates to a step of introducing a curing agent to rapidly harden the injected capsule material. As the curing agent, an aliphatic amine solvent, fatty acid, or the like may be used. More preferably, stearic acid can be used.

Next, the stirring step (S50) relates to a step of agitating the material in which the time light raw material and the capsule material are mixed at a high temperature of about 100° C. to 130° C., and the maturation of the material may be shortened by this stirring process. The aging step (S60) relates to a step of aging the materials mixed by stirring at room temperature for about 24 hours, and the materials mixed by the aging process undergo a chemical reaction so that physical properties can be stabilized. do.

Next, the sterilization and disinfection step (S70) relates to a step of sterilizing and disinfecting the microencapsulated time light raw material after completion of aging, and the time light raw material having been matured using ethanol is used for about an hour at a temperature of about 70°C. Sterilization and disinfection are carried out by the cleaning process.

Next, the step of producing the shining powder (S80) relates to the step of pulverizing the shining material, which has been sterilized and disinfected by washing with ethanol (S70), into fine particles using a stirrer, and a drying process for about 30 minutes After completely removing the moisture contained in the light source material through the light by using a stirrer to produce fine particles by pulverizing the powder.

Finally, the final inspection step (S90) relates to a step of finally inspecting the cleaning state and glossiness of the manufactured light powder. If the inspection result is poor, the sterilization and disinfection steps and the drying process are again performed. .

Through this process, the raw material for the time-light powder completed until the final inspection step (S90) is packaged in plastic in units of about 1 kg and shipped as a product.

Hereinafter, an example of manufacturing the microencapsulated light-emitting powder will be described in detail.

(Sight light powder manufacturing example 1)

A solution (A) was prepared in which 3.4 g of a polyoxymethylene melamine-styrene copolymer as a polymer was dissolved in 10 ml of acetone as an organic solution by stirring at a temperature of 25°C. Afterwards, in 10 ml of acetone, xylylphenylethane 4.7g, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate 1.3g, reversible photochromic powder, trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine A solution (B) was prepared by dispersing 0.2 g at a temperature of 25° C. for 15 minutes. After that, the solution (A) was added to the dispersed solution (B), homogeneously dispersed for 30 minutes, and 1 g of stearic acid was added to Capsules were prepared. Thereafter, the prepared microcapsules were washed with ethanol, the washed microcapsules were dried, and then the microcapsules were pulverized using a stirrer to prepare a shining powder.

(Sight light powder manufacturing example 2)

Except for using 0.2 g of indolinotrimethylspiroindolinenaphthooxazine, which is a reversible photochromic powder, a vision powder was prepared in the same manner as in Preparation Example 1.

(Sight light powder manufacturing example 3)

Except for using the reversible photochromic powder trimethylindolinopiperidinilspironaphthooxazine 0.2g, a shining powder was prepared in the same manner as in Preparation Example 1.

(Sight Light Powder Preparation Example 4)

Except for the use of 0.2 g of diphenyl naphthopyran, which is a reversible photochromic powder, a vision powder was prepared in the same manner as in Preparation 1 of the vision powder.

(Comparative example 1 of optical powder)

Except for the addition of the solution (A), the sight powder (e) was prepared in the same manner as in Preparation 1 of the sight powder.

(Comparative example 2 of optical powder)

Except for the addition of the solution (A), a sight powder (f) was prepared in the same manner as in Preparation 3 of the sight powder.

On the other hand, FIGS. 3 to 7 show test results of cosmetics manufactured using the shining powder prepared according to Preparation Examples 1 to 4, and FIGS. 3A and 3B are reversible photochromic powders. Manufactured by using the raw material of the optical powder using trimethyl indolinopiperidinilspironaphthooxazine (respective light powder preparation example 3) and trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine (time light powder preparation example 1), respectively It shows the test result of the finished lip balm.

In the case of a lip balm containing trimethylindolinopiperidinilspironaphthooxazine that discolors to purple, it can be seen that it changes color from colorless to purple by exposure to ultraviolet rays, and trimethyltrifluoromethylindorinopipe discolors to a red color. In the case of lip balm containing lidinylspironaphthooxazine, it was confirmed that the color was changed from colorless to red-pink (magenta) by UV exposure, and the same performance could be maintained even when used for a long time. It appears to be hardly affected by the back.

However, when the vision powder (e) prepared in Comparative Example 1 is included in the rim balm, and when the viewing powder (f) prepared in Comparative Example 2 is included in the rim balm, the color change is purple and purple, respectively, even when exposed to ultraviolet rays, Although it was discolored to red-pink, it was confirmed that the vision performance was significantly reduced after 1 hour.In this case, when the non-microencapsulated vision powder was exposed to the external environment, the performance of these vision powders became incomplete, and its characteristics Was found to be lost.

Likewise, FIGS. 4 to 7 test the effects of lipstick, lip gloss and tint, hair spray, and nail polish, each of which is manufactured using the shining powder according to the present invention.

Not only can all of them show a vivid color change by exposure to UV rays, but also color change from colorless to colored, as well as color change from colored to colored by mixing with colored general raw materials is possible. You can see what can be expressed.

Therefore, according to the method of manufacturing the vision powder and the vision powder according to the present invention as described above, it is made of a combination of components that are not harmful to the human body, but changes to a different color in response to ultraviolet rays. Due to its excellent reversible properties, it can be used as a raw material for various cosmetics that can be used not only for skin, but also for lips, hair, and nails, as well as excellent stability by making a light-emitting material that reacts to ultraviolet rays in a powder type and at the same time being microencapsulated. It has various advantages, such as being able to be used freely in any cosmetic formulation because it can be easily applied to aqueous and natural ingredients.

The above-described embodiments have been described with respect to the most preferred examples of the present invention, but are not limited to the above embodiments, and hair care products such as hair wax, hair coating agents, and hair treatments not illustrated above, eye shadows, and cheek touch Various modifications can be made within the scope not departing from the technical idea of the present invention, such as the shining powder raw material or the shining powder according to the present invention can be used in a variety of products requiring a light-emitting material that is harmless to the human body as well as a series of cosmetics including color cosmetics such as color cosmetics. It is obvious to those skilled in the art that it is possible.

The present invention relates to a method of manufacturing a vision powder and a vision powder, and more specifically, it is possible to manufacture a raw material for a vision powder that changes color when exposed to ultraviolet rays without using components harmful to the human body, and at the same time, a conventional dye type The present invention relates to a method of manufacturing a vision powder and a powder that is manufactured in a powder type and can be freely applied and used in any kind of cosmetic formulation.

S10: material input step S20: material mixing step
S30: capsule material input step S40: hardener input step
S50: stirring step S60: aging step
S70: sterilization and disinfection step S80: light powder manufacturing step
S90: Final inspection stage

Claims (10)

Microencapsulated in which the raw material of the shining powder including xylylphenylethane, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate and reversible photochromic powder is surrounded by a polyoxymethylenemelamine-styrene copolymer As a shining powder,
The weight ratio of the styrene:polyoxymethylene melamine of the polyoxymethylene melamine-styrene copolymer is in the range of 1:6 to 6:1.
The method of claim 1,
The reversible photochromic powder is any of trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine, indolinotrimethylspiroindolinenaphthooxazine, trimethylindolinopiperidinilspironaphthooxazine, and diphenylnaphthopyran. Microencapsulated light powder, characterized in that one.
delete The method of claim 1,
Microencapsulated vision powder, characterized in that the size of the microencapsulated vision powder particles are 1 to 10 micrometers of fine particles.
(a) adding and mixing xylylphenylethane, pentaerythritoltetra-di-t-butylhydroxyhydrocinnamate, and reversible photochromic powder;
(b) a material mixing step in which acetone is added and mixed with the material introduced in the material input step, and the weight ratio of the added material and acetone is in the range of 2:1 to 1:2;
(c) a microcapsule material input step of injecting a material of microcapsules that surrounds the outside of the raw material for light-emitting powder mixed in the material mixing step;
(d) a curing agent input step of introducing a curing agent for curing the microcapsule material;
(e) a stirring step of stirring at a high temperature of 100 to 130 degrees to mature the microcapsules into which the curing agent is added, and a aging step of aging to stabilize physical properties;
(f) a sterilization and disinfection step of washing the aged microcapsules with ethanol after the aging step;
(g) a step of producing a shining powder in which the washed microcapsules are dried and pulverized into fine particles using a stirrer; And
(h) a final inspection step of finally checking the cleaning state and glossiness of the prepared shining powder; A method for producing a light-emitting powder, characterized in that it comprises a.
The method of claim 5,
The reversible photochromic powder is any of trimethyltrifluoromethylindorinopiperidinylspironaphthooxazine, indolinotrimethylspiroindolinenaphthooxazine, trimethylindolinopiperidinilspironaphthooxazine, and diphenylnaphthopyran. A method for producing a shining powder, characterized in that one.
The method of claim 6,
The microcapsule material introduced in step (c) is a polyoxymethylene melamine-styrene copolymer, and the weight ratio of the styrene:polyoxymethylene melamine of the polyoxymethylene melamine-styrene copolymer is in the range of 1:6 to 6:1 A method for producing a shining powder, characterized in that it is.
The method of claim 7,
The method of manufacturing a vision powder, characterized in that the vision powder prepared in step (g) is microencapsulated microparticles of 1 to 10 micrometers.
The method of claim 8,
In the step (a), xylylphenylethane 47 to 49 parts by weight, pentaerythritytetra-di-t-butylhydroxyhydrocinnamate 13 to 23 parts by weight, and 2 to 4 parts by weight of reversible photochromic powder are added. A method for producing a shining powder, characterized in that.
The method of claim 9,
The method of manufacturing a light-emitting powder, characterized in that the curing agent added in step (d) is stearic acid.

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