KR20230166679A - composition of insulation paint and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an insulating paint composition and a method for manufacturing the same, which not only has low thermal conductivity, but also has a high reflectance and excellent adhesion strength and accelerated weathering resistance.

Description

Insulating paint composition and manufacturing method thereof {composition of insulation paint and manufacturing method thereof}

The present invention relates to an insulating paint composition and a method for manufacturing the same, which not only has low thermal conductivity, but also has a high reflectance and excellent adhesion strength and accelerated weathering resistance.

Paint has been developed for a long time and has been developed in various compositions for various purposes, and one of the most popular synthetic resin paints is polyurethane paint.

This polyurethane paint is a paint made by combining polyol and isocyanate. The component with -NCO group (Isocyanate Group) and the component with -OH group (Hydroxy Group) react to form -NHCOO- structure (urethane bond) in the paint film. It is a paint made by using a resin (urethane resin) that can contain -NCO and -OH groups already reacted to form -NHCOO- as a binder or as a part of the binder. The hardness of the coating film is high and it is elastic, so it is wear-resistant, It is an effective paint with excellent impact resistance, durability, and chemical resistance.

However, these synthetic resin paints not only have problems such as polluting indoor air and destroying the environment, but polyurethane paints have a pot life because the viscosity increases after mixing and eventually hardens when used, and due to the water resistance of the coating film, Delamination between layers may occur because the top coat does not wet the base coat well, and if there is moisture in the object or painting equipment, bubbles can easily form.

To overcome these problems of conventional synthetic resin paints, paints using natural substances that have been recently developed have the advantages of producing a natural scent instead of the toxicity of synthetic resin paints, emitting negative ions, and increasing the deodorization rate, but are less durable and require a coating film treatment. When applied thickly, there are problems such as flowing down and partially detaching.

Accordingly, the development of nature-friendly paints to solve the above problems is currently underway.

Korean Patent Publication No. 10-2009-0116473 (Publication Date: 2009.11.11)

The present invention was developed in consideration of the above points, and the purpose of the present invention is to provide a heat insulating paint composition that not only has low thermal conductivity, but also has high reflectance and excellent adhesion strength and accelerated weathering resistance, and a method for producing the same.

In order to solve the above-described problems, the insulating paint composition of the present invention may include red clay paste, acrylic emulsion resin, titanium dioxide-coated silicon dioxide hollow sphere particles, and cypress tree extract.

In a preferred embodiment of the present invention, the insulating paint composition of the present invention may be used for buildings.

In a preferred embodiment of the present invention, the insulating paint composition of the present invention contains 5 to 15 parts by weight of acrylic emulsion resin, 18 to 28 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, and 100 parts by weight of red clay paste. It may contain 3 to 13 parts by weight of cypress tree extract.

In a preferred embodiment of the present invention, the insulating paint composition of the present invention contains 1 to 10 parts by weight of magnesium hydroxide with an average particle diameter of 10 to 30 ㎛, and 1 to 10 parts by weight of aluminosilicate circular hollow body, based on 100 parts by weight of the red clay paste. parts by weight and 1 to 8 parts by weight of polypropylene fiber.

Meanwhile, the method for producing the insulating paint composition of the present invention includes a first step of preparing a mixture by mixing and stirring red clay paste, acrylic emulsion resin, distilled water, a thickener, and a dispersant, and titanium dioxide-coated silicon dioxide hollow sphere particles in the mixture. , cypress tree extract, magnesium hydroxide with an average particle size of 10 to 30㎛, aluminosilicate circular hollow body, polypropylene fiber, and distilled water are added and stirred to prepare an insulating paint composition.

In a preferred embodiment of the present invention, the titanium dioxide-coated silicon dioxide hollow sphere particles are prepared in a first step of preparing a first mixed solution by mixing silicon dioxide powder, titanium dioxide powder, and trihydromethyl aminomethane in distilled water, A second step of preparing a second mixed solution by adding and dispersing nitric acid dropwise until the pH of the first mixed solution is 1 to 5, and a third step of mixing an aqueous solution containing colloidal silicic acid with the second mixed solution. Manufactured through the third step of preparing a mixed solution and the fourth step of mixing isopropyl alcohol in the third mixed solution, dispersing it, and spray drying to produce titanium dioxide-coated silicon dioxide hollow sphere particles. It may have happened.

The insulating paint composition and its manufacturing method of the present invention not only have low thermal conductivity, but also have high reflectance and excellent adhesion strength and accelerated weathering resistance.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and identical or similar components are given the same reference numerals throughout the specification.

The method for producing the insulating paint composition of the present invention includes a first step and a second step.

First, in the first step of the method for producing the insulating paint composition of the present invention, a mixture can be prepared by stirring red clay paste, acrylic emulsion resin, distilled water, thickener, and dispersant.

Red clay paste is a material that can improve air and water purification through absorption due to its porous nature and the effect of far-infrared rays. Red clay paste is a filler coated with red clay, masato, iron oxide (Fe ₂ O ₃ ), sodium chloride (NaCl), and titanium dioxide. and water, and preferably includes red clay, masato, iron oxide (Fe ₂ O ₃ ), sodium chloride (NaCl), titanium dioxide-coated filler, and water. Additionally, the red clay paste may have an average particle diameter of 0.02 to 0.1 mm. In addition, the red clay paste contains 28 to 42 parts by weight of red clay, 6.6 to 10 parts by weight of iron oxide, 6.6 to 10 parts by weight of sodium chloride, 6 to 18 parts by weight of titanium dioxide-coated filler, and 15 to 40 parts by weight of water. May include wealth. In addition, the material of the filler can be any filler used in the industry, preferably polyester fiber, polypropylene fiber, nylon fiber, glass fiber, or carbon fiber, but is not limited thereto.

Acrylic emulsion resin serves as a miscible polymer that improves various physical properties. Acrylic emulsion resin is a synthetic organic polymer material that gains fluidity due to heat, so it can also be called a thermoplastic resin. Acrylic emulsions commonly used in building coating compositions may be used without limitation, and are preferably hydrophobic acrylic monomers including alkyl acrylate or alkyl methacrylate, acrylamide compounds, vinyl pyrrolidone compounds, and aminoethyl acrylate compounds. It can be prepared by reacting a hydrophilic monomer and a polymerization initiator including at least one monomer selected from the group consisting of, an ethylene oxide-added acrylic monomer, an unsaturated carboxylic acid monomer, and an acrylic monomer containing a hydroxy group or a glycidyl group. At this time, the molecular weight may be 1 million to 1 million.

Also, preferably, the acrylic emulsion resin of the present invention may include one or more of pure acrylic emulsion resin, EVA-acrylic hybrid emulsion resin, and styrene-acrylic emulsion resin.

Meanwhile, the mixture may contain 5 to 15 parts by weight of acrylic emulsion resin, preferably 8 to 12 parts by weight, based on 100 parts by weight of red clay paste. If it exceeds this weight range, it may have low thermal conductivity. In addition, there may be a problem in that the effects of high reflectivity, excellent adhesion strength, and accelerated weather resistance are not all satisfied.

Furthermore, the mixture may be 60 to 90 parts by weight of distilled water, preferably 70 to 80 parts by weight, based on 100 parts by weight of the red clay paste.

The thickener can be used without limitation as long as it is a thickener commonly used in paints, and may preferably include carboxymethyl cellulose (CMC).

Additionally, the mixture may contain 1 to 10 parts by weight of thickener, preferably 2 to 5 parts by weight, based on 100 parts by weight of red clay paste.

The dispersant may be used without limitation as long as it is a dispersant commonly used in paints, and may preferably include ethylene vinyl acetate (EVA).

Additionally, the mixture may contain 1 to 10 parts by weight, preferably 2 to 5 parts by weight, of a dispersant based on 100 parts by weight of the red clay paste.

Next, in the second step of the method for producing the insulating paint composition of the present invention, titanium dioxide (TiO ₂ )-coated silicon dioxide (SiO ₂ ) hollow sphere particles and cypress tree extract (chamaecyparis obtusa) are added to the mixture prepared in the first step. An insulating paint composition can be prepared by adding and stirring magnesium hydroxide (Mg(OH) ₂ ), aluminosilicate hollow spheres, polypropylene fiber, and distilled water.

The prepared insulating paint composition may be used for buildings. Additionally, the cypress tree extract may be an extract of cypress tree leaves (chamaecyparis obtusa leaf extract).

Titanium dioxide-coated silicon dioxide hollow sphere particles can be manufactured including the first to fourth steps.

First, the first step of the manufacturing method of titanium dioxide-coated silicon dioxide hollow sphere particles is to mix silicon dioxide powder (SiO ₂ Powder), titanium dioxide powder (TiO ₂ Powder), and tris hydroxymethyl aminomethane in distilled water. The first mixed solution can be prepared by mixing. At this time, the first mixed solution may be a mixture of silicon dioxide powder and titanium dioxide powder at a weight ratio of 1:0.1 to 0.5, preferably 1:0.2 to 0.4.

Next, in the second step of the method for producing titanium dioxide-coated silicon dioxide hollow sphere particles, nitric acid is added until the pH of the first mixed solution prepared in the first step is 1 to 5, preferably 2 to 4. A second mixed solution can be prepared by adding dropwise and dispersing. At this time, dispersion can be performed for 1 to 10 minutes using an ultrasonic disperser.

Next, the third step of the method for manufacturing titanium dioxide-coated silicon dioxide hollow sphere particles is to prepare a third mixed solution by mixing an aqueous solution containing colloidal silica with the second mixed solution prepared in the second step. It can be manufactured. At this time, the second mixed solution and the aqueous solution containing colloidal silicic acid can be mixed at a weight ratio of 1:0.6 to 1.1, preferably 1:0.78 to 0.98. Additionally, colloidal silicic acid may have a particle size of 12 to 32 nm, preferably 17 to 27 nm.

Next, in the fourth step of the method of manufacturing titanium dioxide-coated silicon dioxide hollow sphere particles, isopropyl alcohol (isopropanol) is mixed with the third mixed solution prepared in the third step, dispersed, and then spray dried. Thus, titanium dioxide-coated silicon dioxide hollow sphere particles can be manufactured. At this time, the third mixed solution and isopropyl alcohol can be mixed at a weight ratio of 1:0.2 to 1.2, preferably 1:0.5 to 0.9. Additionally, dispersion can be performed for 1 to 10 minutes using an ultrasonic disperser. Additionally, the manufactured titanium dioxide-coated silicon dioxide hollow sphere particles may have an average particle size of 1 to 10 μm, preferably 2 to 5 μm.

Meanwhile, the insulating paint composition of the present invention may be a mixture of 18 to 28 parts by weight, preferably 21 to 25 parts by weight, of titanium dioxide-coated silicon dioxide hollow sphere particles, based on 100 parts by weight of red clay paste. If it exceeds the weight part range, there may be a problem of not only having low thermal conductivity, but also failing to satisfy all of the effects of high reflectivity, excellent adhesion strength, and accelerated weather resistance.

Cypress tree extract can be prepared including the first to third steps.

First, in the first step of the method for producing cypress tree extract, a mixture can be made by mixing and stirring crushed cypress tree leaves (Chamaecyparis obtusa Leaf) and 80 kg of purified water. At this time, cypress leaves and purified water may be mixed at a weight ratio of 1:2 to 6, preferably 1:3 to 5.

Next, in the second step of the method for producing the cypress extract, the mixture prepared in the first step is heated under sealed conditions at a temperature of 90 to 130°C, preferably 100 to 110°C, for 10 to 50 minutes, preferably 15 to 150°C. The sterilization process can be performed by treating for 25 minutes.

Next, in the third step of the method for producing the cypress extract, the mixture sterilized in the second step is sterilized under vacuum conditions at a temperature of 40 to 80°C, preferably 55 to 65°C, for 50 to 100 hours, preferably 64 to 65°C. Cypress extract can be produced by extraction for 80 hours.

On the other hand, the insulating paint composition of the present invention may be a mixture of 3 to 13 parts by weight of cypress extract, preferably 6 to 10 parts by weight, based on 100 parts by weight of red clay paste, and if it exceeds this weight range, In addition to having low thermal conductivity, there may be a problem of not satisfying all of the effects of high reflectivity, excellent adhesion strength, and accelerated weather resistance.

In addition, the insulating paint composition of the present invention may be mixed with 1 to 10 parts by weight of magnesium hydroxide (Mg(OH) ₂ ), preferably 3 to 7 parts by weight, based on 100 parts by weight of the red clay paste, and the magnesium hydroxide has an average amount of The particle diameter may be 10 to 30㎛, preferably 15 to 25㎛.

Aluminosilicate circular hollow bodies play a role in improving insulation performance. Specifically, the aluminosilicate circular hollow body may be a ceramic microscopic hollow sphere powder containing aluminosilicate as a main ingredient, and can have significantly excellent insulation performance due to its hollow structure. . Additionally, the aluminosilicate may have a particle size of 20 to 110 ㎛, preferably 30 to 100 ㎛. Additionally, the aluminosilicate may have a specific gravity of 0.5 to 1.0 cm ³ , preferably 0.7 to 0.88 cm ³ . Additionally, the aluminosilicate may have a melting point of 1500 to 2100°C, more preferably 1600 to 2000°C. Additionally, the aluminosilicate of the present invention may have a compressive strength of 2500 to 3500 N/cm2, preferably 2800 to 3200 N/cm2.

On the other hand, the insulating paint composition of the present invention may be a mixture of 1 to 10 parts by weight, preferably 3 to 7 parts by weight, of circular hollow aluminosilicate body with respect to 100 parts by weight of red clay paste. If it deviates, there may be a problem that not only does it have low thermal conductivity, but it also fails to satisfy all of the effects of high reflectivity, excellent adhesion strength, and accelerated weather resistance.

In addition, the insulating paint composition of the present invention may be mixed with 1 to 8 parts by weight of polypropylene fiber, preferably 2 to 5 parts by weight, based on 100 parts by weight of red clay paste, and 4000 to 20000 parts by weight of polypropylene fiber, preferably. may have a weight average molecular weight of 7000 to 11000.

In addition, the distilled water used in the second step of the method for producing the insulating paint composition of the present invention may be mixed in an amount of 1 to 30 parts by weight, preferably 10 to 20 parts by weight, based on 100 parts by weight of the red clay paste.

Meanwhile, the insulating paint composition of the present invention may include red clay paste, acrylic emulsion resin, titanium dioxide-coated silicon dioxide hollow sphere particles, and cypress tree extract, and the components included are as described above. Additionally, the insulating paint composition of the present invention may be used for buildings.

Specifically, the insulating paint composition of the present invention contains 5 to 15 parts by weight of acrylic emulsion resin, preferably 8 to 12 parts by weight, and 18 to 28 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, based on 100 parts by weight of red clay paste. parts, preferably 21 to 25 parts by weight, and 3 to 13 parts by weight, preferably 6 to 10 parts by weight, of cypress extract.

In addition, the insulating paint composition of the present invention may further include one or more selected from magnesium hydroxide, aluminosilicate circular hollow body, and polypropylene fiber, preferably magnesium hydroxide, aluminosilicate circular hollow body, and polypropylene fiber. may include. At this time, the ingredients included are the same as described above.

Specifically, the insulating paint composition of the present invention contains 1 to 10 parts by weight of magnesium hydroxide, preferably 3 to 7 parts by weight, and 1 to 10 parts by weight of aluminosilicate circular hollow body, based on 100 parts by weight of the red clay paste. It may contain 3 to 7 parts by weight, 1 to 8 parts by weight, and preferably 2 to 5 parts by weight of polypropylene fiber.

Although the present invention has been described above with a focus on embodiments, this is only an example and does not limit the embodiments of the present invention, and those skilled in the art will be able to understand the essential characteristics of the present invention. It can be seen that various modifications and applications not exemplified above are possible without departing from the scope. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

[Example]

Preparation Example 1: Preparation of titanium dioxide-coated silicon dioxide hollow sphere particles

(1) A first mixed solution was prepared by mixing silicon dioxide powder (SiO ₂ Powder), titanium dioxide powder (TiO ₂ Powder), and tris hydroxymethyl aminomethane in distilled water. At this time, the first mixed solution mixed silicon dioxide powder and titanium dioxide powder at a weight ratio of 1:0.3.

(2) Nitric acid was added dropwise until the pH of the first mixed solution reached 3, and the second mixed solution was prepared by dispersing for 5 minutes using an ultrasonic disperser.

(3) A third mixed solution was prepared by mixing an aqueous solution containing colloidal silica (particle size: 22 nm, included at 50% by weight) with the second mixed solution. At this time, the second mixed solution and the aqueous solution containing colloidal silicic acid were mixed at a weight ratio of 1:0.88.

(4) Mix isopropyl alcohol (isopropanol) in the third mixed solution at a weight ratio of 1:0.7, disperse for 5 minutes using an ultrasonic disperser, and then spray dry using buchi mini spray dryer B-290 equipment. , Finally, titanium dioxide-coated hollow silicon dioxide sphere particles with an average particle size of 3㎛ were produced.

Preparation Example 2: Preparation of Cypress extract

(1) A mixture was prepared by mixing and stirring 20 kg of crushed Chamaecyparis obtusa Leaf and 80 kg of purified water.

(2) The prepared mixture was sterilized by treating it at a temperature of 105°C for 20 minutes under sealed conditions.

(3) The sterilized mixture was extracted under vacuum conditions at a temperature of 60°C for 72 hours to prepare chamaecyparis obtusa extract.

Example 1: Preparation of insulating paint composition

(1) Add red clay paste, acrylic emulsion resin (Daewon Polymer, DA430), distilled water, carboxymethyl cellulose (CMC) as a thickener, and ethylene vinyl acetate (EVA) as a dispersant into a stirrer and stir for 60 minutes at a speed of 550 rpm. A mixture was prepared. At this time, the mixture consisted of 10 parts by weight of acrylic emulsion resin, 75 parts by weight of distilled water, 3 parts by weight of thickener, and 3 parts by weight of dispersant based on 100 parts by weight of red clay paste.

(2) The prepared mixture contains titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1, Cypress extract prepared in Preparation Example 2, magnesium hydroxide (Mg(OH)) with an average particle diameter of 20㎛, and aluminum. A non-silicate circular hollow body (Insullad Asia, Insullad), polypropylene fiber with a weight average molecular weight of 9000, and distilled water were added, and stirred for 90 minutes at a speed of 1050 rpm to prepare an insulating paint composition. At this time, the insulating paint composition contains 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, 8 parts by weight of cypress extract, 5 parts by weight of magnesium hydroxide, and 5 parts by weight of aluminosilicate circular hollow body, based on 100 parts by weight of red clay paste. It was prepared by mixing 3 parts by weight of polypropylene fiber and 15 parts by weight of distilled water.

Example 2: Preparation of insulating paint composition

An insulating paint composition was prepared in the same manner as in Example 1. However, unlike Example 1, where 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1 were mixed with 100 parts by weight of the red clay paste, 100 parts by weight of the red clay paste prepared in Preparation Example 1 15 parts by weight of silicon dioxide hollow sphere particles coated with titanium dioxide were mixed to prepare a final insulating paint composition.

Example 3: Preparation of insulating paint composition

An insulating paint composition was prepared in the same manner as in Example 1. However, unlike Example 1, where 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1 were mixed with 100 parts by weight of the red clay paste, 100 parts by weight of the red clay paste prepared in Preparation Example 1 31 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles were mixed to prepare a final insulating paint composition.

Example 4: Preparation of insulating paint composition

(1) Add red clay paste, acrylic emulsion resin (Daewon Polymer, DA430), distilled water, carboxymethyl cellulose (CMC) as a thickener, and ethylene vinyl acetate (EVA) as a dispersant into a stirrer and stir for 60 minutes at a speed of 550 rpm. A mixture was prepared. At this time, the mixture consisted of 10 parts by weight of acrylic emulsion resin, 75 parts by weight of distilled water, 3 parts by weight of thickener, and 3 parts by weight of dispersant based on 100 parts by weight of red clay paste.

(2) The prepared mixture contains titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1, Cypress extract prepared in Preparation Example 2, aluminosilicate circular hollow body (Insullad Asia, Insullad), and weight average molecular weight. 9000 polypropylene fiber and distilled water were added and stirred for 90 minutes at a speed of 1050 rpm to prepare an insulating paint composition. At this time, the insulating paint composition contains 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, 8 parts by weight of cypress extract, 5 parts by weight of aluminosilicate circular hollow body, and 3 parts by weight of polypropylene fiber, based on 100 parts by weight of red clay paste. It was prepared by mixing 15 parts by weight of water and 15 parts by weight of distilled water.

Example 5: Preparation of insulating paint composition

An insulating paint composition was prepared in the same manner as in Example 1. However, unlike in Example 1 where 5 parts by weight of magnesium hydroxide were mixed with 100 parts by weight of red clay paste, 12 parts by weight of magnesium hydroxide was mixed with 100 parts by weight of red clay paste to prepare a final heat insulating paint composition.

Example 6: Preparation of insulating paint composition

(1) Add red clay paste, acrylic emulsion resin (Daewon Polymer, DA430), distilled water, carboxymethyl cellulose (CMC) as a thickener, and ethylene vinyl acetate (EVA) as a dispersant into a stirrer and stir for 60 minutes at a speed of 550 rpm. A mixture was prepared. At this time, the mixture consisted of 10 parts by weight of acrylic emulsion resin, 75 parts by weight of distilled water, 3 parts by weight of thickener, and 3 parts by weight of dispersant based on 100 parts by weight of red clay paste.

(2) In the prepared mixture, titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1, Cypress extract prepared in Preparation Example 2, magnesium hydroxide (Mg(OH)) with an average particle diameter of 20㎛, weight Polypropylene fibers with an average molecular weight of 9000 and distilled water were added and stirred at a speed of 1050 rpm for 90 minutes to prepare an insulating paint composition. At this time, the insulating paint composition is 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, 8 parts by weight of cypress extract, 5 parts by weight of magnesium hydroxide, 3 parts by weight of polypropylene fiber, and distilled water, based on 100 parts by weight of red clay paste. It was prepared by mixing 15 parts by weight.

Example 7: Preparation of insulating paint composition

An insulating paint composition was prepared in the same manner as in Example 1. However, unlike Example 1, where 5 parts by weight of the aluminosilicate circular hollow body were mixed with 100 parts by weight of the red clay paste, 12 parts by weight of the aluminosilicate circular hollow body was mixed with respect to 100 parts by weight of the red clay paste, and finally, an insulating paint. A composition was prepared.

Example 8: Preparation of insulating paint composition

(1) Add red clay paste, acrylic emulsion resin (Daewon Polymer, DA430), distilled water, carboxymethyl cellulose (CMC) as a thickener, and ethylene vinyl acetate (EVA) as a dispersant into a stirrer and stir for 60 minutes at a speed of 550 rpm. A mixture was prepared. At this time, the mixture consisted of 10 parts by weight of acrylic emulsion resin, 75 parts by weight of distilled water, 3 parts by weight of thickener, and 3 parts by weight of dispersant based on 100 parts by weight of red clay paste.

(2) The prepared mixture contains titanium dioxide-coated silicon dioxide hollow sphere particles prepared in Preparation Example 1, Cypress extract prepared in Preparation Example 2, magnesium hydroxide (Mg(OH)) with an average particle diameter of 20㎛, and aluminum. A non-silicate circular hollow body (Insullad Asia, Insullad) and distilled water were added and stirred for 90 minutes at a speed of 1050 rpm to prepare an insulating paint composition. At this time, the insulating paint composition contains 23 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, 8 parts by weight of cypress extract, 5 parts by weight of magnesium hydroxide, and 5 parts by weight of aluminosilicate circular hollow body, based on 100 parts by weight of red clay paste. It was prepared by mixing 15 parts by weight of water and 15 parts by weight of distilled water.

Example 9: Preparation of insulating paint composition

An insulating paint composition was prepared in the same manner as in Example 1. However, unlike Example 1, where 3 parts by weight of polypropylene fibers were mixed with 100 parts by weight of red clay paste, 10 parts by weight of polypropylene fibers were mixed with 100 parts by weight of red clay paste to prepare a final insulating paint composition.

Comparative Example 1: Preparation of insulating paint composition

(1) Add red clay paste, acrylic emulsion resin (Daewon Polymer, DA430), distilled water, carboxymethyl cellulose (CMC) as a thickener, and ethylene vinyl acetate (EVA) as a dispersant into a stirrer and stir for 60 minutes at a speed of 550 rpm. A mixture was prepared. At this time, the mixture consisted of 10 parts by weight of acrylic emulsion resin, 75 parts by weight of distilled water, 3 parts by weight of thickener, and 3 parts by weight of dispersant based on 100 parts by weight of red clay paste.

(2) Into the prepared mixture, the Cypress tree extract prepared in Preparation Example 2, magnesium hydroxide (Mg(OH)) with an average particle diameter of 20㎛, aluminosilicate circular hollow body (Insullad Asia, Insullad), weight average molecular weight 9000. Polypropylene fiber and distilled water were added and stirred for 90 minutes at a speed of 1050 rpm to prepare an insulating paint composition. At this time, the insulation paint composition is a mixture of 8 parts by weight of cypress extract, 5 parts by weight of magnesium hydroxide, 5 parts by weight of aluminosilicate circular hollow body, 3 parts by weight of polypropylene fiber, and 15 parts by weight of distilled water, based on 100 parts by weight of red clay paste. It was manufactured.

Experimental Example 1: Thermal conductivity measurement

Thermal conductivity was measured for each of the insulating paint compositions prepared in Examples 1 to 9 and Comparative Example 1 according to the KSL 1064 test standard, and is shown in Table 1 below.

Experimental Example 2: Reflectance measurement

The reflectance was measured for each of the insulating paint compositions prepared in Examples 1 to 9 and Comparative Example 1 according to the KSL 2514 test standard, and is shown in Table 1 below.

Experimental Example 3: Measurement of adhesion strength

The adhesion strength of each of the insulating paint compositions prepared in Examples 1 to 9 and Comparative Example 1 was measured according to the KS M ISO 4624 test standard and is shown in Table 1 below.

Experimental Example 4: Accelerated weathering resistance evaluation

After leaving the insulating paint compositions prepared in Examples 1 to 9 and Comparative Example 1 for 300 hours each under the following exposure conditions, cracking, swelling, falling off, color change, etc. were observed with the naked eye, measured on a 5-point scale, and the results were reported. It is shown in Table 1 (the higher the score, the less peeling, cracking, or splitting of the paint appears; the lower the score, the more peeling, cracking, or splitting of the paint occurs.)

*Exposure conditions*

① Carbon arc voltage, current - Allowable range of AC voltage: 48 ~ 52V, Allowable range of AC current: 58 ~ 62A

② Filter - Type I or Type II based on KS F 2274

③ Surface irradiance: 255 W/m ² (wavelength: 300 ~ 700nm)

④ Temperature: 63℃, relative humidity: 50%

⑤ Surface water spray cycle: 80 minutes of irradiation, then 20 minutes of water spray

⑥ Survey method: Continuous survey

As can be seen in Table 1, it was confirmed that the insulating paint composition prepared in Example 1 not only had low thermal conductivity, but also had high reflectance and excellent adhesion strength and accelerated weathering resistance.

Simple modifications or changes to the present invention can be easily implemented by those skilled in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

Claims (5)

An insulating paint composition comprising red clay paste, acrylic emulsion resin, titanium dioxide-coated silicon dioxide hollow sphere particles, and cypress tree extract.
According to paragraph 1,
The insulating paint composition includes 5 to 15 parts by weight of acrylic emulsion resin, 18 to 28 parts by weight of titanium dioxide-coated silicon dioxide hollow sphere particles, and 3 to 13 parts by weight of cypress extract, based on 100 parts by weight of red clay paste. Insulating paint composition.
According to paragraph 2,
The insulating paint composition further contains 1 to 10 parts by weight of magnesium hydroxide with an average particle diameter of 10 to 30㎛, 1 to 10 parts by weight of aluminosilicate circular hollow body, and 1 to 8 parts by weight of polypropylene fiber, based on 100 parts by weight of red clay paste. A heat insulating paint composition comprising:
A first step of preparing a mixture by mixing and stirring red clay paste, acrylic emulsion resin, distilled water, thickener, and dispersant; and
Into the mixture, titanium dioxide-coated silicon dioxide hollow sphere particles, cypress tree extract, magnesium hydroxide with an average particle diameter of 10 to 30㎛, aluminosilicate circular hollow body, polypropylene fiber, and distilled water were added and stirred to prepare an insulating paint composition. Second stage of manufacturing;
Method for producing an insulating paint composition comprising:
The method of claim 4, wherein the titanium dioxide-coated silicon dioxide hollow sphere particles are
A first step of preparing a first mixed solution by mixing silicon dioxide powder, titanium dioxide powder, and trihydromethyl aminomethane in distilled water;
A second step of preparing a second mixed solution by adding and dispersing nitric acid dropwise until the pH of the first mixed solution reaches 1 to 5;
A third step of preparing a third mixed solution by mixing the second mixed solution with an aqueous solution containing colloidal silicic acid; and
A fourth step of mixing isopropyl alcohol in the third mixed solution, dispersing it, and spray drying to produce hollow silicon dioxide sphere particles coated with titanium dioxide;
A method for producing an insulating paint composition, characterized in that it is manufactured through.