KR100730577B1 - A multifunction paints for cases of electronic apparatus and a method thereof - Google Patents

Abstract

  As a coating material for painting and construction iron on the case of plastic electronic devices of the present invention, by adding special additives to acrylic resin, epoxy resin, or polyurethane resin, anion generation, odor removal, antibacterial or sterilization It is to provide a functional paint and a method of manufacturing the same.

  The present invention is to provide a paint having a special effect by coating a building material on a case of electronic devices, such as a plastic case, such as a TV case, a mobile phone case, or a metal case, and a manufacturing method thereof.

The functional paint of the present invention is 20 to 40% of a binder made of acrylic resin, epoxy resin or polyurethane resin, 5 to 10% of pigment, 2 to 20% of tourmaline powder pulverized at 600 hour, and leveling agent, anti-settling agent and antifoaming agent. It is a functional paint prepared by mixing 2 ~ 2% of other additives and 40 ~ 60% of solvents (ketone, aromatic, cellulsolve, acetate).

Functional paint, far infrared ray, antibacterial action, anion generation, odor removal

Description

A multifunction paints for cases of electronic apparatus and a method

  Paint is an object surface that is used for protection and coloring, by spreading fluid on the surface of an object to form a thin layer that makes it hard.

  The object is slightly eroded by external influences, large and small. In addition, the material value alone is often low on the surface alone. Therefore, it protects it from external influences, and ① protects objects, protects against corrosion, oil, chemicals, and moisture. 2. beautification, smoothing, label, gloss, and sterilization. Used to prevent reflection and biological attachment.

  The main components of the paint are broadly divided into a colorant (vehicle), which is a coating film forming component, and a pigment component. The colorant corresponds to a transparent paint, and is a component that disperses a pigment or the like and gives fluidity to the paint.

  Paints are called by various names by the classification method, and can be broadly classified into water-based paints and oil-based paints. Water-based paints use water instead of organic solvents, and are economical, easy to handle, and safe. It is a paint used for wall painting, stone, and ground paint of buildings, such as emulsion paint and water-soluble baking resin paint. Oil paints are mainly paints using a colorant made of natural oils, and lacquer, cashew paint, oil paint, oil enamel and the like.

  In recent years, synthetic resin paints are being rapidly developed, and their use is expanding. The main ones are: ① alkyd resin paint ② amino alkyd resin paint ③ acrylic resin paint ④ phenolic resin paint ⑤ epoxy resin paint ⑥ unsaturated polyester resin paint ⑦ polyurethane resin paint.

  In recent years, as well as conventional paints are not limited to the protection and coloring of the surface of the object, so-called "functional paints" that have a special action has been developed a lot, radio wave absorption paints, conductive paints and the like have been developed and used.

  In addition to the general functions of aesthetics and protection, functional paints can be used to maximize the resistance to physical and chemical external stimuli (heat resistance, chemical resistance), or to convert the input into high-quality quality and output the high-function of the conversion function (voltage, electric heating system, etc.). It is a paint containing high performance and a high function which includes not only surface modification but a 3rd function as well as surface modification by converting the property related to the surface of a coating film into a coating film by coating as well as the general function of a coating material as a target coating material.

  Patent Publication No. 2002-0063535, published on August 3, 2002, discloses a noble metal catalyst body based on ceramic alumina and charcoal, and on the oxidation of hydrogen produced by electrolysis of ambient water or water at room temperature. There is disclosed a method for producing a functional ceramic powder which greatly improves characteristics such as odor removal, water evaporation, far infrared radiation, and anion generation by mixing tourmaline, which emits and emits a large amount of far infrared rays and anions.

  In addition, Korean Patent Registration No. 10-0358326 filed on October 25, 2002, contains a mixture of 50 to 70% by weight of charcoal and 25 to 50% by weight of adhesive on at least one surface of a conventional super medium. It is applied to the wall of the building constructed with cement and applied to the super medium produced by drying with hot air at a temperature of 50 ~ 70 ℃ and spreading it through charcoal with far infrared radiation function and negative ion emission function, humidity control and electromagnetic wave absorption function. Not only can the odor generated from the cement be easily removed, the removal efficiency of the harmful components is excellent, and the adhesion of the paper medium can be easily performed.

  The present invention relates to a functional paint, and has an object to provide a functional paint having far-infrared radiation function and anion emission function, controlling humidity and having an electromagnetic wave absorption function. Functional paints of the present invention configured for this are 30 to 60% by weight of fine powder charcoal, liquid binder <(matrix polymer>) as chloroprene, polyvinyl acetate, polyacrylic acid ester, polyvinyl alcohol, carboxymethyl cellulose and It is composed of a mixture of 30 to 70% by weight of any one of the emulsion-type resin and 10 to 40% by weight of pigments expressing color and scent, and thus it has far-infrared radiation function and anion emission function by being applied to the walls of buildings. A functional paint is disclosed which can control the humidity and remove odor generated from cement due to charcoal having a function of absorbing electromagnetic waves.

  An object of the present invention is to improve a functional paint and a method for producing the same, which produce anion, far-infrared radiation, odor removal, antibacterial or sterilization using a special acrylic resin or urethane resin special additive as a paint to be applied to plastics.

  An object of the present invention is to provide a paint and a method of manufacturing the same, which have a special effect by painting on a case of electronic devices, for example, a plastic case such as a TV case, a mobile phone case.

  In addition, another object of the present invention is to use a special epoxy resin, acrylic urethane resin, alkyd resin and the like additives for use in construction iron or iron products, functional anion, anion generation, far infrared generation, odor removal, antibacterial or sterilizing And to provide a method of manufacturing the same.

  The present invention is a method for producing a paint having a variety of functions by mixing and grinding a tourmaline gemstone 600 mesh sacrificing together with various pigment additives such as acrylic resin, epoxy resin, urethane resin and the like.

Paint according to an embodiment of the present invention is 20 to 30% by weight epoxy resin, 0.05 to 0.08% by weight dispersant, 5 to 10% by weight pigment, 5 to 8% by weight tourmaline powder, 20 to 30% by weight aromatic solvent, ketone A paint composition comprising 25 to 38% by weight of solvent, 4 to 8% by weight of vinyl resin, 1 to 2% by weight of nitrocellulose, and other additives (0.07 to 0.15% by weight).
Paint according to another embodiment of the present invention is 9 to 12% by weight epoxy resin, 0.1 to 0.3% by weight dispersant, 10 to 15% by weight aromatic solvent, 15 to 25% by weight pigment, 5 to 8% by weight tourmaline powder, sedimentation A first intermediate product containing 1.5 to 2.8% by weight of an inhibitor, an antifoaming agent or a leveling agent, 20 to 25% by weight of an aromatic solvent, and 10 to 13% by weight of an alcohol solvent, and polyamide 5 to 5, which is a curing agent of the epoxy resin. 10 wt% of the aromatic solvent and 10-15 wt% of the aromatic solvent and 7-10 wt% of the cellulose solvent are included, and the first intermediate product and the second intermediate product immediately before coating work Is a coating composition used by mixing in a weight ratio of 3-5.
Paint according to another embodiment of the present invention is a functional paint for coating a case of an electronic device including a plastic or iron, 18 to 25% by weight of polyester polyol resin, 10 to 17% by weight of acrylic polyol, aromatic Solvent 4 ~ 5 wt%, Acetate solvent 10 ~ 18 wt%, Dispersant 0.08 ~ 0.12 wt%, Pigment 4.5 ~ 6.0 wt%, Tourmaline powder 5 ~ 8 wt%, Other additives 1.5 ~ 2.5 wt%, Ketone solvent 8 To 12% by weight, a first intermediate product containing 5 to 10% by weight of an acetate solvent, 8 to 10% by weight of isocyanate, 3 to 7% by weight of an aromatic solvent and a 10 to 15% by weight of an acetate solvent. A coating composition comprising two intermediate products and mixing the first intermediate product and the second intermediate product at a weight ratio of 5 to 10: 1 immediately before the painting operation.
In the functional paint manufacturing method for coating an electronic device plastic case according to an embodiment of the present invention, (A) 20 to 30% by weight of acrylic resin and 0.05 to 0.08% by weight of a dispersant are mixed and mixed, and pigments 5 to 10 are added thereto. Mix and mix the weight% uniformly, mix 5 to 8% by weight of tourmaline powder to be uniformly dispersed, mix by adding 10-15% by weight of aromatic solvent and 10-15% by weight of ketone solvent. , (B) 10 to 15% by weight of aromatic solvent and 10 to 15% by weight of ketone solvent are mixed in a separate container to dissolve 4 to 8% by weight of vinyl resin and 1 to 2% by weight of nitrocellulose. The raw materials prepared in a) are mixed and mixed uniformly, and uniformly added by adding 0.07 to 0.15 wt% of other additives, and then the viscosity is adjusted as 5 to 8 wt% of other solvents.
In addition, in the method of manufacturing a functional paint for coating a building material of a metal material according to another embodiment of the present invention, (A) 9 to 12% by weight of the epoxy resin dispersant 0.1 to 0.3% by weight and aromatic solvent 10 to 15% by weight To uniformity by mixing, uniformly disperse by mixing 15 to 25% by weight of the pigment, and uniformly by adding 5 to 8% by weight of tourmaline powder, uniformly mixed by mixing 1.5 to 2.8% by weight of other additives 20 to 25% by weight of an aromatic solvent, 10 to 13% by weight of an alcoholic solvent, and 3 to 5% by weight of a cellulose solvent are mixed and packaged as a first intermediate product after viscosity control, and (b) the epoxy resin curing agent. 5-10 wt% of phosphorus polyamide is mixed with 10-15 wt% of aromatic solvent and 7-10 wt% of cellulsolve solvent, and then packaged as a second intermediate product. Paint that allows the product to be mixed and used in a weight ratio of 3 to 5: 1 It is a manufacturing method.
In addition, in the method of manufacturing a functional paint for painting an electronic device case according to another embodiment of the present invention, (A) 18 to 25% by weight of polyester polyol resin and 4 to 5% by weight of aromatic solvent in 10 to 17% by weight of acrylic polyol %, 10 to 18% by weight of the acetate-based solvent is mixed, and mixed by adding 0.08 to 0.12% by weight of the dispersant, and then 4.5 to 6.0% by weight of the pigment to be uniformly dispersed, 5 to 8% by weight of tourmaline powder Uniformity by adding 1.5 ~ 2.0% by weight of additives such as leveling agent, anti-settling agent, antifoaming agent, and then homogeneous, and after adjusting the viscosity by adding 8 ~ 12% by weight of ketone solvent, 5 ~ 10% by weight of acetate solvent Packed with the first intermediate product, (b) 8 to 10% by weight of isocyanate, 3 to 7% by weight of the aromatic solvent and 10 to 15% by weight of the acetate solvent are uniformly mixed and then packaged with the second intermediate product. First intermediate product in use A coating method using a mixture in a weight ratio of 1: 2 to the intermediate product 5-10.

  Tourmaline is a silicate mineral containing boron, aluminum, etc., as described in published Patent Publication No. 2002-0063535, which is a vacancy known as tourmaline because it generates electricity by itself in columnar crystals belonging to hexagonal system. .

  In the present invention, the tourmaline is finely pulverized to 600 mesh or more and mixed by 5 to 8% by weight to obtain various functional paints for painting plastic or steel cases of electronic devices.

  The ratios used below are all weight ratios and work in a normal temperature environment.

  Common to each embodiment, first, the tourmaline is pulverized well to 600 mesh or more to prepare a tourmaline powder to proceed with the manufacturing process.

  Example 1) Acrylic lacquer coating for plastic case coating

  1-1> Acrylic resin (20-30% by weight) and dispersant (0.05-0.08% by weight) are mixed and mixed.

  1-2> Mix in 1-1 above, mix and disperse the pigment (5-10% by weight) uniformly, and then disperse evenly by mixing tourmaline powder (5-8% by weight) .

  1-3> Mix in 1-2 above and mix by adding aromatic solvent (10-15% by weight) and ketone solvent (10-15% by weight).

  1-4> A vinyl resin (4-8% by weight) nitrocellulose (1-2% by weight) by mixing an aromatic solvent (10-15% by weight) and a ketone solvent (10-15% by weight) in a separate container Dissolve).

  1-5> Mix the raw materials prepared in the above 1-4 with the raw materials prepared in the above 1-3 and mix uniformly.

  1-6> After adding the other additives (0.07-0.15% by weight) to the raw material prepared in 1-5 above to make it uniform, adjust the viscosity as the other solvent (5-8% by weight). As other additives, an appropriate amount of a leveling agent, an antifoaming agent or an antisettling agent is added as necessary, and other solvents may be ketone solvents.

  Acrylic lacquer (silver color) paint made by the above method is 20 to 30% by weight acrylic resin, 0.05 to 0.08% by weight dispersant, pigment 5 to 10% by weight tourmaline powder 5 to 8% by weight, aromatic solvent 20 to 30% by weight , 25 to 30% by weight of ketone solvent, 4 to 8% by weight of vinyl resin, 1 to 2% by weight of nitrocellulose, and 0.07 to 0.15% by weight of other additives. As other additives, an appropriate amount of leveling agent, antifoaming agent or antisettling agent is added as necessary.

  Example 2) Epoxy-based paint for electronic device case coating, which can be used for metal construction materials

  2-1> Epoxy resin (9-12 wt%) is mixed with a dispersant (0.1-0.3 wt%) and an aromatic solvent (10-15 wt%) to make it uniform.

  2-2> The pigment (15 to 25% by weight) is mixed and uniformly dispersed in the raw material prepared in 2-1 above.

  2-3> Tourmaline powder (5 ~ 8% by weight) is added to the raw material prepared in 2-2 above to make it uniform.

  2-4> After mixing by mixing other additives (1.5 ~ 2.8% by weight) to the raw material prepared in the above 2-3

      Make it uniform. Other additives are appropriately added leveling agents, antifoaming agents or antisettling agents as necessary.

  2-5> Viscosity by mixing the aromatic solvent (20 ~ 25% by weight), alcohol solvent (10 ~ 13% by weight), cellulose solvent (3 ~ 5% by weight) to the raw material prepared in the above 2-4 Pack after adjustment.

  2-6> In a separate container, package polyamide ((5 to 10% by weight of epoxy curing agent)) mixed with aromatic solvent (10 to 15% by weight) and cellulose solvent (7 to 10% by weight).

  2-7> Package the product prepared in 2-5 above and the product prepared in 2-6 above separately and mix them when used.

  The coating material for electronics case coating produced by this method is epoxy resin (9-12 wt%), dispersant (0.1-0.3 wt%), aromatic solvent (10-15 wt%), pigment (15-25 wt%) ), Tourmaline powder (5 to 8% by weight), sedimentation inhibitors, defoamers and / or leveling agents (1.5 to 2.8% by weight), aromatic solvents (20 to 25% by weight) and alcohol solvents (10 to 13% by weight), Cellulsolve solvents (3 to 5 wt%) Aromatic solvents (10 to 15 wt%) and cellulose solvents (1 to 5 wt%) in the first intermediate product and polyamide ((Epoxy Curing Agent)) 7 to 10% by weight), including a second intermediate product mixed, and the first intermediate product and the second intermediate product (3 ~ 5): 1 (weight ratio) by mixing immediately before the coating work It becomes paint.

  Example 3) Urethane paint for painting electronic device case

  3-1> Aromatic solvent (4 to 5 wt%) and acetate solvent (10 to 18 wt%) are mixed with polyester polyol resin (18 to 25 wt%) and acryl polyol (10 to 17 wt%). .

  3-2> After mixing by adding a dispersant (0.08 ~ 0.12% by weight) to the raw material prepared in 3-1 above, the pigment (4.5 ~ 6.0% by weight) is added to uniformly dispersed.

  3-3> Tourmaline powder (5 to 8% by weight) is added to the raw material prepared in 3-2 above to make it uniform.

  3-4> After adding the other additives (1.5 ~ 2.5% by weight) to the raw material prepared in the above 3-3 to homogeneous ketone solvent (8 ~ 12% by weight), acetate solvent (5 ~ 8% by weight) It is added and packaged after viscosity adjustment. Other additives are appropriately added leveling agents, antifoaming agents or antisettling agents as necessary.

  3-5> In a separate container, mix isocyanate (aka urethane curing agent) 8 ~ 10% by weight), aromatic solvent (3 ~ 7% by weight), acetate solvent (10 ~ 15% by weight) Pack it.

  3-6> The product manufactured in the above 3-4 and the product prepared in the above 3-5 are separately packed and mixed when used.

  Paints prepared in this way are polyester polyol resins (18 to 25% by weight), acrylic polyols (10 to 17% by weight), aromatic solvents (4 to 5% by weight), acetate solvents (10 to 18% by weight) , Dispersant (0.08 ~ 0.12% by weight), pigment (4.5 `6.0% by weight), tourmaline powder (5-8% by weight), other additives (1.5-2.5% by weight), ketone solvent (8-12% by weight), A first intermediate product containing an acetate solvent (5 to 10% by weight) and an isocyanate (8 to 10% by weight), an aromatic solvent (3 to 7% by weight) and an acetate solvent (10 to 15% by weight) The first intermediate product and the second intermediate product (5 to 10): 1 (weight ratio) are mixed with the second intermediate product immediately before the painting operation, and thus, the functional paint for painting the electronics case.

The composition ratio of the paint of the present invention can be slightly added or subtracted from the composition ratio described above.

Test results of the epoxy-based paint samples prepared by the above method is shown in Table 1, Table 2, Table 3, Table 4.

As can be seen from Table 1 showing the test data, it was found that 1200 anions were generated per 1cc.                     

Table 1 Anion Test Results

Sample Name Item Anion (ION / cc) Manufacture Paint 1200

Remark) 1.Test piece: 40 * 40 * 297 (mm)

      2. It was tested at the temperature of 23 ℃ and 41% humidity of anion water 73 / cc using charged particle device. The anion released from the object was measured and expressed as the number of ions per unit volume.

The far-infrared emission was tested on the same sample, which shows 90.4% of the black body radiation as shown in Table 2.

<Table 2> Far Infrared Test Results

Emissivity (5 ~ 20㎛) Radiant energy (w / ㎡) 0.904 3.64 * 10

Remarks) 1. Measurement result compared to BLACK BODY using FT-IR Spectrometer at 40 ℃.

Deodorization tests were performed on the same samples, and as shown in Table 3, the ammonia gas deodorization rate was found to be 32.0% after 30 minutes to 35.3% after 120 minutes.

<Table 3> Deodorization Test Results

Test item (test gas) Elapsed time (minutes) BLANK concentration (ppm) Sample concentration (ppm) Deodorization rate (%) Deodorization test (NH ??) 30 194 132 32.0 60 152 101 33.6 90 131 85 35.1 120 116 75 35.3

Remark) 1. Blank: Measured without sample.

      2.Test piece: 40 * 40 * 10 (mm)                     

As a result of the antimicrobial test for E. coli on the same sample, it can be seen that the E. coli concentration is decreasing as shown in Table 4, and that the concentration was 1: 1 before the test compared to the case without paint. : 0.884, showing a difference of 4.35 times. In other words, when the paint of the present invention is used, the bacteria decrease by 11.6%, but when the paint is not used, the bacteria increase to 385%.

In addition, the antimicrobial test for Pseudomonas aeruginosa under the same conditions shows that the concentration of Pseudomonas aeruginosa is decreasing, as shown in Table 4, and that the concentration of 1: 1 before the test was 3.97 after the test compared to the case without paint. : 0.85, showing 4.67 times the difference. In other words, when the paint of the present invention is used, the germs are reduced by 15%, but when the paint is not used, the germs are increased to 397%.

<Table 4> Antibacterial Test

Test Items Sample classification Initial concentration (CFU / 40P) Concentration after 24 hours (CFU / 40P) Bacterial Concentration Ratio Antibacterial test by E. coli BLANK 421 1621 +3.85 Manufacture Paint 421 372 -0.884 Antibacterial test by Pseudomonas aeruginosa BLANK 406 1610 +3.97 Manufacture Paint 406 345 -0.85

Remark) 1. Blank: Measured without sample.

      2.CFU: Colony Forming Unit

      3.401P: 0.04ML

      4. The number of bacteria on the medium is calculated by multiplying the dilution multiples.                     

      5. Number of bacteria used

         Escherichia coli ATcc 25922

         Pseudomonas aeruginosa ATcc 15442

This functional paint is suitable for being applied to a plastic case, but of course it can be coated on steel.

  As described above, the functional paint of the present invention has been proved to have a good positive effect such as anion generation, large-scale radiation of far infrared rays, deodorizing action, antibacterial action and the like.

Electronic devices are objects frequently touched by human hands. The use of this functional paint is hygienic because it can prevent bacterial growth. In addition, since electronic devices are mostly close to the human body such as a recorder, a mobile phone, and an mp3 player, functions such as negative ion generation, far infrared radiation, and deodorization are very good for health.

Claims (7)

delete   20 to 30% by weight epoxy resin, 0.05 to 0.08% by weight dispersant, 5 to 10% by weight pigment, 5 to 8% by weight tourmaline powder, 20 to 30% by weight aromatic solvent, 25 to 38% by weight ketone solvent, vinyl resin A functional coating composition for coating on a plastic case of an electronic device comprising 4 to 8% by weight, 1 to 2% by weight of nitrocellulose and 0.07 to 0.15% by weight of other additives.   Epoxy resin 9-12 wt%, dispersant 0.1-0.3 wt%, aromatic solvent 10-15 wt%, pigment 15-25 wt%, tourmaline powder 5-8 wt%, sedimentation inhibitor, antifoaming agent or leveling agent 1.5-2.8 wt% %, The first intermediate product containing 20 to 25% by weight of aromatic solvent and 10 to 13% by weight of alcohol-based solvent,  5 to 10 wt% of polyamide, which is a curing agent of the epoxy resin, comprising 10 to 15 wt% of an aromatic solvent and 7 to 10 wt% of a cellulose solvent. A functional coating composition for a building material of metal material, characterized in that the first intermediate product and the second intermediate product are mixed at a weight ratio of 3 to 5: 1 immediately before the painting work.   As a functional paint for coating a case of an electronic device including plastic or iron, 18 to 25% by weight of polyester polyol resin, 10 to 17% by weight of acrylic polyol, 4 to 5% by weight of aromatic solvent, and 10% of acetate solvent ~ 18% by weight, dispersant 0.08 ~ 0.12% by weight, pigment 4.5 ~ 6.0% by weight, tourmaline powder 5 ~ 8% by weight, other additives 1.5 ~ 2.5% by weight, ketone solvent 8-12% by weight, acetate solvent 5-10 A first intermediate product comprising weight percent,   A second intermediate product comprising 8 to 10% by weight of isocyanate, 3 to 7% by weight of aromatic solvent and 10 to 15% by weight of acetate solvent,  Functional paint for electronic device case coating, characterized in that the first intermediate product and the second intermediate product is mixed at a weight ratio of 5 to 10: 1 immediately before the painting work.   In the functional paint manufacturing method for painting the electronic device plastic case, (A) 20 to 30% by weight of acrylic resin and 0.05 to 0.08% by weight of dispersant are mixed and mixed, 5 to 10% by weight of pigment is mixed and uniformly dispersed, and then 5 to 8% by weight of tourmaline powder is mixed. Uniformly dispersed, 10 to 15% by weight of an aromatic solvent and 10 to 15% by weight of a ketone solvent are added and mixed, (B) 10 to 15% by weight of aromatic solvent and 10 to 15% by weight of ketone solvent are mixed in a separate container to dissolve 4 to 8% by weight of vinyl resin and 1 to 2% by weight of nitrocellulose. ) To prepare a functional coating material for plastic case coating for electronic devices, characterized by mixing uniformly by mixing the raw materials prepared in the), uniformly adding 0.07 to 0.15 wt% of other additives, and then adjusting the viscosity as 5 to 8 wt% of other solvents. Way   In the method of manufacturing a functional paint for painting a building material of a metal material, (A) 9 to 12% by weight of epoxy resin, 0.1 to 0.3% by weight of dispersant and 10 to 15% by weight of aromatic solvent are mixed and uniformly mixed, 15 to 25% by weight of pigment is uniformly dispersed, and tourmaline powder 5 ~ 8% by weight is added to make uniform, and 1.5 to 2.8% by weight of other additives are mixed and uniformly mixed, 20 to 25% by weight aromatic solvent, 10 to 13% by weight alcohol solvent, cellulose solvent 3 to 5% by weight of the mixture after mixing the viscosity of the first product packaging, (B) After mixing 10 to 15% by weight of the aromatic solvent and 7 to 10% by weight of the cellulsolve solvent to polyamide 5 to 10% by weight of the polyamide of the epoxy resin curing agent, and then packaged as a second intermediate product, When using, the first intermediate product and the second intermediate product is a functional paint manufacturing method for painting the building material of a metal material, characterized in that to mix and use in a weight ratio of 3 to 5: 1: 1.   In the functional paint manufacturing method for painting the electronic device case, (A) 18 to 25% by weight of polyester polyol resin and 10 to 17% by weight of acrylic polyol are mixed with 4 to 5% by weight of aromatic solvent and 10 to 18% by weight of acetate solvent, and 0.08 to 0.12% by weight of dispersant is added. After mixing, add 4.5 to 6.0% by weight of pigment to make it uniformly dispersed, add 5 to 8% by weight of tourmaline powder to make it uniform, and add 1.5 to 2.0% by weight of additives such as leveling agent, antisettling agent and antifoaming agent. After uniformity by adding 8 to 12% by weight of ketone solvent, 5 to 10% by weight of acetate-based solvent, after packaging the first intermediate product after viscosity control, (B) Uniformly mix 8 to 10% by weight of isocyanate, 3 to 7% by weight of aromatic solvent and 10 to 15% by weight of acetate solvent, package it with a second intermediate product, and then use the first intermediate product. And a second intermediate product in a weight ratio of 5 to 10: 1 by using a functional paint manufacturing method for painting the electronic device case.