KR20230057779A - Versatile paint using rubber chip - Google Patents

Abstract

The present invention relates to a paint composition that can be used for purposes such as painting, heat insulation, sound insulation, coating, painting, art, dyeing, and adhesion. Since the coating composition of the present invention is formulated with an optimal composition including rubber components and resins, miscibility, heat insulation, sound insulation, adhesion, aesthetics, durability, etc. are improved, it is applied to the surface of a building as well as a heat and sound insulation paint, as well as art. It is very suitable for use in various applications such as paints, coatings, and adhesives.

Description

Insulation paint using rubber chips {VERSATILE PAINT USING RUBBER CHIP}

The present invention relates to a coating composition with improved heat insulation and sound insulation properties, which is formulated in an optimal composition including a rubber component and a resin to improve heat insulation and sound insulation properties as well as miscibility, adhesion, durability, aesthetics, etc., so that heat insulation applied to the surface of a building And it is very suitable for use in a variety of applications, such as paints for art, coatings, and adhesives, as well as paints for soundproofing.

In general, building structures are built by applying various insulation materials in order to maintain a constant indoor temperature without being affected by external temperature or weather conditions. The higher the insulation effect of the insulation material, the less affected by the outside temperature, so the energy saving effect of using and maintaining artificial cooling and heating facilities such as air conditioners and heaters increases. importance is growing.

Insulation materials are largely divided into insulation panels and insulation paints. Insulation panels are mainly manufactured by molding or filling methods, and have the advantage of easy insulation and less time consuming, while materials such as asbestos or glass wool are used. If there is a problem that can have a harmful effect on the human body.

When using paint as a heat insulating material, there is an advantage in that it is inexpensive and easy to construct compared to the heat insulating panel. However, the conventional paint for heat insulation is difficult to apply thickly, has relatively low insulation performance and durability, and has problems in that mold may occur due to condensation.

On the other hand, recently, as noise between floors has emerged as a social problem, attention has been focused on materials with soundproofing or sound-absorbing power because noise standards must be met during construction. Since there is a problem of losing, it is necessary to develop a paint material capable of efficient sound insulation.

Therefore, the problem to be solved by the present invention is formulated with an optimal composition including rubber components and resins to improve not only heat insulation and sound insulation, but also miscibility, durability, adhesion, aesthetics, etc. It is to provide a paint composition that can be.

The tasks of the present invention are not limited to the technical tasks mentioned above, and other technical tasks not mentioned will be clearly understood by those skilled in the art from the following description.

A coating composition according to an embodiment of the present invention for solving the above problems includes 20-50 wt% of rubber; 0 or 1-15 wt% gypsum; 20-70 wt% of additives; And a residual amount of moisture, wherein the rubber includes at least one of EPDM rubber and NBR rubber of 20-120 mesh, and the additive is one of acrylic resin, urethane resin, epoxy resin, and EVA resin Resin additives containing the above; inorganic additives including at least one of iron oxide, titanium dioxide and silica; and an organic additive comprising at least one of benzisothiazolinone, propylene glycol and hydroxypropyl methylcellulose.

The EPDM rubber or NBR rubber may be produced by a low-temperature grinding method or a millstone grinding method at -300-10 ° C.

The coating composition may satisfy at least one of the following (1) to (4).

(1) Sound insulation: 4 dB or more

(2) Adhesive strength: 2 MPa or more

(3) Tensile strength: 10 MPa or more

(4) Density: 3.0 g/cm ³ or less

The coating composition may be used for one or more purposes selected from the group consisting of painting, heat insulation, sound insulation, coating, painting, art, dyeing, and adhesion.

Other embodiment specifics are included in the detailed description.

Since the paint composition according to the embodiments of the present invention is formulated with an optimal composition including a rubber component and a resin to improve heat insulation and sound insulation, as well as miscibility, adhesion, durability, aesthetics, etc., insulation and It is very suitable for use in various applications such as soundproofing paints, art paints, coatings, and adhesives.

In addition, there is an advantage in that cost competitiveness can be increased by omitting expensive glass ceramics because it exhibits excellent heat insulation, sound insulation, adhesion, and the like even without a glass ceramic component.

Effects according to the embodiments of the present invention are not limited by the contents exemplified above, and more diverse effects are included in the present specification.

1 and 2 are photographs showing the appearance and spreadability with texture and thickness of the coating composition according to the experimental example of the present invention.
Figure 3 is a photograph showing the high-temperature insulation and low-temperature insulation evaluation process of the coating composition according to the experimental example of the present invention.
Figure 4 is a photograph showing a sample coated with the condensation performance test report and paint composition according to the experimental example of the present invention.
5 is a toxic substance test confirmation of a coating composition according to an experimental example of the present invention.
6 is a fire safety test result of a paint composition according to an experimental example of the present invention.
7 is a photograph showing the soundproofing evaluation test process of the paint composition according to the experimental example of the present invention.

Advantages and features of the present invention, and how to achieve them, will become clear with reference to the detailed description of the following embodiments. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art in the art to which the present invention belongs It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, 'and/or' includes each and every combination of one or more of the recited items. In addition, singular forms also include plural forms unless otherwise specified in the text. The terms 'comprises' and/or 'comprising' used in the specification do not exclude the presence or addition of one or more other elements other than the mentioned elements. Numerical ranges expressed using '-' or 'to' represent numerical ranges including the values listed before and after them as lower and upper limits, respectively, unless otherwise specified. 'About' or 'approximately' means a value or range of values within 20% of the value or range of values set forth thereafter.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

And, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiments of the present invention, the detailed description will be omitted.

Hereinafter, embodiments of the present invention will be described in detail.

A coating composition according to an embodiment of the present invention includes 20-50 wt% of rubber, 0 or 1-15 wt% of gypsum, and 20-70 wt% of additives, and includes a balance of moisture. The additive includes a resin additive, an inorganic additive, and an organic additive, preferably 40-70 wt% or 50-70 wt%, more preferably 55-70 wt% or 50-60 wt%.

rubber

As the rubber, at least one selected from the group consisting of EPDM rubber, NBR rubber, NR rubber, SBR rubber, and silicone rubber may be used, and preferably at least one of EPDM rubber and NBR rubber may be used. Rubber can be used in the form of rubber particles, rubber chips, and rubber powder. The rubber may have a particle size of 20-120 mesh, preferably 40-80 mesh. EPDM rubber and/or NBR rubber may be prepared by low-temperature grinding at -300-10 °C. However, the embodiments of the present invention are not limited thereto, and rubber may be ground by a millstone at room temperature.

EPDM rubber and NBR rubber are excellent in weather resistance and durability, and can maximize the heat insulation performance and improve sound insulation of the paint composition of the present invention. In addition, since the rubber serves as a filler, it is easy to form a thickness of the coating composition.

The rubber may be included in the coating composition of the present invention at 20-50 wt%, preferably 20-40 wt%, and more preferably 20-30 wt%. If the rubber content is less than the above range, heat insulation performance, sound insulation, etc. may be deteriorated, and if the rubber content exceeds the above range, adhesive strength, agitation, etc. may be deteriorated.

gypsum

As the gypsum, hemihydrate gypsum (CaSO ₄ . 1/2H ₂ O), dihydrate gypsum (CaSO ₄ . 2H ₂ O), or mixed gypsum may be used, and insulation performance and sound insulation may be improved. Gypsum may be used in the form of gypsum powder, but embodiments of the present invention are not limited thereto.

Gypsum may be included in 0 or 1-15 wt% in the coating composition of the present invention. That is, gypsum may be used or omitted, and when gypsum is used, it may be included at 1-15 wt%, preferably 5-10 wt%.

resin additives

The resin additive may include at least one of an acrylic resin, a urethane resin, an epoxy resin, and an EVA resin, and preferably may include an acrylic resin.

The acrylic resin may impart excellent processability, alkalinity, hardness, corrosion resistance and high luminance appearance characteristics to the paint composition.

The acrylic resin may be prepared by polymerizing a (meth)acrylate monomer and a vinyl monomer. The type of (meth)acrylate monomer is not particularly limited, but examples thereof include N-methylol acrylamide, 2-hydroxypropyl methacrylate, propyl methacrylate, t-butylaminoethyl methacrylate, and dicyclophene. Tenyl oxyethyl methacrylate, acrylic acid dimer, hexanediol diacrylate, t-butyl acrylate, triisopropylsilyl acrylate, benzyl methacrylate, hydroxyethyl methacrylate phthalate, 2-hydroxyethyl methacrylate , trimethylolpropane triacrylate, tripropylene glycol diacrylate, ethyl methacrylate, diacetone acrylamide, isobutyl methacrylate, hydroxyisopropyl methacrylate, isopropyl methacrylate, cyclohexyl methacrylate , triisopropylsilyl methacrylate, isobornyl acrylate, t-butylcyclohexyl methacrylate, trimethylcyclohexyl methacrylate, acrylonitrile, methyl methacrylate, acrylic acid, t-butyl methacrylate, isobornyl At least one selected from methacrylate, methacrylonitrile, methacrylic acid, acrylamide, methacrylamide, chlorostyrene, and cyclohexylvinyl ether may be used.

The type of vinyl monomer is not particularly limited, but examples thereof include styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, and vinyl cyclohexanoate. , At least one selected from vinyl acetate, vinyl pyrrolidone, vinyl chloride, vinyl alcohol, acetoxy styrene, t-butyl styrene, and vinyl toluene may be used.

The acrylic resin may have a solid content (NV) of 25 to 55%, for example, 35 to 45%, a glass transition temperature (Tg) of 70 to 100 °C, for example 80 to 90 °C, and acid It may be -10 to 10 mgKOH/g, for example -5 to 2 mgKOH/g, and the number average molecular weight may be 10,000 to 50,000 g/mol, for example 25,000 to 35,000 g/mol.

When the glass transition temperature (Tg) of the acrylic resin is less than 70 ° C, hot water resistance and hardness may decrease, and when it exceeds 100 ° C, chemical resistance and corrosion resistance may decrease. Chemical resistance and weather resistance may be deteriorated when the acid value of the acrylic resin is less than -10 mgKOH/g, and chemical resistance and corrosion resistance may be deteriorated when the acid value is greater than 10 mgKOH/g. When the number average molecular weight of the acrylic resin is less than 10,000 g/mol, appearance and hardness may deteriorate, and when it exceeds 50,000 g/mol, chemical resistance and corrosion resistance may deteriorate.

As the urethane resin, one produced by the reaction of polyol and isocyanate may be used.

As the polyol, conventional polyols used in the synthesis of urethane resins in the art may be used without particular limitation. Non-limiting examples of polyols include polyether polyol, polyester polyol, polycaprolactone polyol, polytetramethylene ether diol, polybutadiene diol, polytetra methylene ether diols, polypropylene oxide diols, polybutyleneoxide diols, triols, and the like. The above components may be used alone or in combination of two or more.

As the isocyanate, conventional isocyanate compounds used in the synthesis of urethane resins in the art may be used without limitation. For example, Methylene Diphenyl Diisocyanate (MDI), Toluene diisocyanate (TDI), Hexa Methylene Di-isocyanate (HMDI), Isophorone Di-isocyanate, IPDI), meta xylene diisocyanate (MXDI), tetramethylxylene diisocyanate (TMXDI), diisocyanate made alicyclic by adding hydrogen to the benzene ring of the MDI (H12 MDI), xylene diisocyanate (XDI) There are diisocyanates (hydrogenated XDI) made alicyclic by adding hydrogen to the benzene ring of The above components may be used alone or in combination of two or more.

The viscosity (23 ° C.) of the urethane resin may be 1,000 to 7,000 mPa.s, for example 2,800 to 5,800 mPa.s, and the solids content (NV) may be 60 to 90%, for example 70 to 80% , the number average molecular weight may be 500 to 3,000 g / mol, for example 1,000 to 1,500 g / mol, the weight average molecular weight may be 1,000 to 5,000 g / mol, for example 1,700 to 2,300 g / mol, isocyanate The equivalent weight may be 200 to 600 g/eq, for example 350 to 450 g/eq.

When the number average molecular weight of the urethane resin is less than 500 g/mol, hot water resistance and weather resistance may be deteriorated, and when it is greater than 3,000 g/mol, corrosion resistance and weather resistance may be deteriorated. When the isocyanate equivalent of the urethane resin is less than 200 g/eq, corrosion resistance and weather resistance may be deteriorated, and when it is greater than 600 g/eq, hot water resistance may be deteriorated.

The resin additive may be included in the additive at 20-90 wt%, preferably 30-80 wt%, and more preferably 40-70 wt%. If the content of the resin additive is less than the above range, miscibility, adhesion, texture, etc. may be weakened, and if it exceeds the above range, heat insulation performance, sound insulation, etc. may be deteriorated.

inorganic additives

As the inorganic additive, at least one selected from the group consisting of iron oxide, titanium dioxide, and silica may be used. The inorganic additive may serve as a filling material to improve durability, impact resistance, and UV blocking properties of the paint composition of the present invention.

In an exemplary embodiment, iron oxide, titanium dioxide, and silica may be included in a ratio of 1 to 5:1 to 5:1 to 5, but embodiments of the present invention are not limited thereto.

Inorganic additives may be included in an amount of 5-40 wt % in the additive. If the content of the inorganic additive is less than the above range, durability, UV blocking properties, etc. may be weakened, and if the content exceeds the above range, adhesiveness, heat insulation performance, etc. may be deteriorated.

organic additives

As organic additives, preservatives, antibacterial agents, solvents, emulsifiers, additives and the like may be included. In a preferred embodiment, at least one selected from the group consisting of benzisothiazolinone, propylene glycol, and hydroxypropyl methylcellulose may be included as the organic additive. The benzisothiazolinone may preferably be 1,2-benzisothiazolin-3-one. In an exemplary embodiment, benzisothiazolinone, propylene glycol and hydroxypropyl methylcellulose may be included in a ratio of 1 to 5:1 to 5:1 to 5, but embodiments of the present invention are not limited thereto.

In addition, the paint composition of the present invention may optionally further include additives commonly used in the field of paint within a range that does not impair the inherent properties of the paint. Non-limiting examples of such additives include dispersing agents, antifoaming agents, defoaming agents, leveling agents, plasticizers, colorants, UV absorbers, surface conditioners, softeners, adhesion promoters, wetting agents, or mixtures thereof.

The dispersant serves to disperse each material constituting the composition and prevent re-agglomeration by maintaining a distance so that uniform physical properties are expressed in the coating film. As the dispersant, a conventional dispersant known in the art may be used, and for example, a block copolymer type dispersant having a high molecular weight may be used.

The antifoaming agent serves to increase the appearance characteristics of the coating film by suppressing bubbles generated during painting, and conventional antifoaming agents known in the art may be used without limitation. For example, a silicone-based or non-silicone-based antifoaming agent may be used, and for example, a polysiloxane type antifoaming agent may be used.

The leveling agent is for leveling the coating composition so that it is coated flatly and smoothly, thereby enhancing the adhesion within the composition and improving the appearance properties of the coating film. As the leveling agent, conventional ones known in the art may be used without limitation, and examples thereof include acrylic, silicone, polyester, and amine leveling agents.

The plasticizer serves to control the viscosity of the paint composition and improve storage stability. As the plasticizer, conventional plasticizers known in the art may be used without limitation, and for example, acrylic or polyester plasticizers may be used.

As a colorant, conventional extender pigments, colored pigments, or mixtures thereof known in the art may be included.

The extender pigment fills pores in the coating film, supplements the formation of the coating film, and serves to impart salinity or mechanical properties to the coating film. Therefore, when the extender pigment is included, it is possible to obtain a good coating film appearance and at the same time improve hardness, impact resistance and rust resistance. As the extender pigment, those commonly used in paint compositions may be used without limitation, and non-limiting examples include calcium carbonate, clay, talc, magnesium silicate, kaolin, mica, silica, aluminum silicate, aluminum hydroxide, and barium sulfate. etc. The above components may be used alone or in combination of two or more.

Colored pigments can be used to express a desired color (color) in a paint or to increase the strength or gloss of a paint film. As such pigments, organic pigments, inorganic pigments, metallic pigments, aluminum-paste, pearls, etc. commonly used in paints may be used without limitation, and these may be used alone or in combination of two or more. there is. Non-limiting examples of usable color pigments include azo-based, phthalocyanine-based, iron oxide-based, cobalt-based, carbonate-based, sulfate-based, silicate-based, and chromate-based pigments, such as titanium dioxide, zinc oxide, bismuth banana date, cyanine green, carbon black, red iron oxide, iron oxide sulfur, navy blue, cyanine blue, and mixtures of two or more thereof.

Organic additives may be included in the additive at 5-40 wt%. If the content of the organic additive is less than the above range, miscibility, corrosiveness, etc. may be weakened, and if the content exceeds the above range, durability, etc. may be deteriorated.

glass ceramic

The coating composition of the present invention exhibits excellent heat insulation performance without a glass ceramic component and can be easily stirred. Therefore, the cost reduction effect can be expected by omitting the glass ceramic.

However, in another embodiment of the present invention, a glass ceramic component may be further included, and the glass ceramic component is light and thus can improve adhesion and applicability when the paint is applied to an article or building exterior.

Glass ceramics may include glass hollow bodies such as glass bubbles or glass fibers. Unlike open cells such as airgel, which is a conventional ceramic material, closed cells such as glass hollow bodies do not deteriorate in insulation performance even when mixed with other materials, and are much cheaper than airgel, so they have high cost competitiveness.

In addition, since the density of glass bubbles is 0.12-0.60 g/cc, which is much lighter than talc (2.7 g/cc), which is another conventional material, adhesion, spreadability, and agitation can be greatly improved.

In some embodiments, the coating composition of the present invention may include glass bubbles satisfying one or more of the following (1) to (3), preferably two or more, more preferably all of them.

(1) Density: 0.12-0.60 g/cc, preferably 0.4-0.6 g/cc

(2) impact strength: 200-27,000 psi, preferably 5,000-20,000 psi

(3) average particle size: 15-65 μm, preferably 33-55 μm

In the case of glass fibers, glass fibers having a thickness of 0.2-0.5 mm or a length of 5-15 mm may be used. If the thickness and length are out of the above ranges, it may be difficult to achieve practical heat insulation performance or to mix uniformly with other materials.

The glass ceramic may be included in the coating composition of the present invention in an amount of 3-30 wt%, preferably 5-20 wt%, and more preferably 5-15 wt%. If the content of the glass ceramic is less than the above range, insulation performance, stirrability, etc. may be deteriorated, and if the content exceeds the above range, adhesive strength or the like may be deteriorated.

However, as described above, since the coating composition of the present invention can exhibit excellent heat insulation performance, sound insulation, adhesiveness, etc. without glass ceramics, it can be characterized by not including glass ceramics.

The coating composition of the present invention may be prepared by mixing 20-50 wt% of rubber, 0 or 1-15 wt% of gypsum, 20-70 wt% of additives, and the remaining amount of water, followed by stirring and aging. At this time, the rubber may be used that is manufactured through a powdering operation of finely pulverizing.

A coating method using the coating composition of the present invention may be as follows.

First, as an undercoating method, after the surface treatment is finished, the primer can be painted with an undercoating material (jaxo). Areas with severe water absorption can be re-coated once additionally.

As a top coating method, after the undercoat is completely dried after at least 3 hours at 20 ° C., the top coating process can be performed. In case of re-coating more than 2 times to further strengthen insulation performance, re-coating can be done after complete curing at least 3 hours at 20 ℃ after minimum painting.

The coating composition of the present invention as described above may satisfy two or more, preferably three or more, more preferably all of the following (1) to (4).

(1) Sound insulation: 4 dB or more, preferably 5 dB or more, more preferably 6 dB or more (based on Experimental Example 1 below)

(2) Bond strength: 2 MPa or more, preferably 2.5 MPa or more, more preferably 3 MPa or more (according to KS F 4919)

(3) Tensile strength: 10 MPa or more, preferably 10.5 MPa or more, more preferably 11 MPa or more (based on ASTM D1708-13)

(4) Density: 3.0 g/cm ³ or less, preferably 2.5 g/cm ³ or less, more preferably 1-2 g/cm ³

Hereinafter, the present invention will be described through preparation examples and experimental examples, but it is obvious that the effects of the present invention are not limited by the following experimental examples.

Preparation Example 1

100 g of glass bubbles with a particle size of about 33-55 μm, 300 g of about 40-80 mesh EPDM rubber powder produced by low-temperature grinding, 50 g of gypsum powder, 270 g of methacrylic acid resin, iron oxide, titanium dioxide and silica 30 g of the mixture, 1,2-benzisothiazolin-3-one, 100 g of a mixture of propylene glycol and hydroxypropyl methylcellulose, 10 g of pigment, and 140 g of water were put into a stirrer and stirred at room temperature for about 20 minutes at 100-200 °C. A coating composition was prepared by stirring and mixing at rpm. (Example)

Experimental Example 1

Aesthetics, application, heat insulation, condensation performance, fire safety, sound insulation, agitation, adhesive strength and tensile strength of the prepared paint compositions of Examples were evaluated. Each item was evaluated in the following way.

- Aesthetics: sensory evaluation of texture and thickness as a function of expressing the appearance of paint

- Applicability: Sensory evaluation of applicability when paint is applied to the exterior of an article with a plastering tool

- Heat Insulation: Coat a transparent glass plate (width 150 mm, length 250 mm) with a thickness of 3 mm on one side of the glass plate using a film maker (applicator, coating width 75 mm) to a thickness of 250 μm (wet film). After painting, leave it at room temperature (23±5 ℃, RH 65±10%) for 5 days, dry it in a dryer at 60 ℃ for 30 minutes, and then use the sample left in a desiccator for more than 30 minutes as a test piece. High temperature insulation and low temperature insulation are evaluated by placing a heat source on one side of the sample and measuring the temperature on the opposite side.

- Condensation performance: A. On a transparent glass plate (150 mm wide, 250 mm long) with a thickness of 3 mm, a paint sample for condensation is applied on one side of the glass plate to a thickness of 250 μm (wet film) using a film maker (applicator, coating width 75 mm). After painting, leave it at room temperature (23±5 ℃, RH 65±10%) for 5 days, dry it in a dryer at 60 ℃ for 30 minutes, and then use the sample left in a desiccator for more than 30 minutes as a test piece. The number of test pieces is one.

me. The temperature of the low temperature part of the constant temperature and humidity tester is -5±0.5 ℃, the temperature and humidity of the high temperature part is maintained at 25±0.5 ℃, and the relative humidity is 60±5%. However, the temperature and humidity of the high-temperature part shall be measured at a point 50 cm away from the test piece installation site.

all. Take out the test piece from the desiccator, immediately fix it airtightly between the low-temperature part and the high-temperature part, set it aside, and measure the test time.

la. If condensation does not occur on the surface of the test piece within 30 minutes of the start of the test, it is judged as pass, and if it does occur, it is judged as fail. Condensation can be checked by rubbing the painted surface with your hands to see if there is any moisture.

- Fire safety: Evaluate the degree of combustion by applying fire for 10 seconds with a 1000 ℃ torch

- Soundproofing: Evaluate the difference in volume from the case of erecting a panel with no paint applied by erecting a panel coated with paint only once at a distance of 10 cm from the speaker outputting white noise, and then measuring the volume on the opposite side. Use a 10 x 10 cm wooden panel with a thickness of 0.8 mm (see Fig. 7).

- Stirrability (miscibility): Sensory evaluation of the degree of mixing of the composition after putting the material in the stirrer and stirring at 100-200 rpm for about 20 minutes

- Adhesion strength: measured and evaluated according to KS F 4919

- Tensile strength: measured and evaluated according to ASTM D1708-13. Calculate the average value of the measured values of at least 5 samples for each condition for the tensile strength calculated at the time the specimen breaks

- Toxic substances: Measure the amount of total volatile organic compounds, toluene and formaldehyde detected

As a comparative example, a commercially available paint composition from T company was used. It was confirmed that the product of T company was composed of airgel, talc, acrylic acid, inorganic additives and colorants. Evaluation results of Examples and Comparative Examples were shown in Table 1 and Figures 1 to 4 below. 1 and 2 are photographs showing the appearance and spreadability having excellent texture and thickness of Examples, Figure 3 is a photograph showing the evaluation process of high-temperature insulation and low-temperature insulation of Examples and Comparative Examples, and Figure 4 is a condensation performance test report of Example And a photograph showing a sample applied with the paint of Example, Figure 5 is a test confirmation for toxic substances of Example, Figure 6 is a fire safety test result of Example, Figure 7 is a photograph showing the sound insulation evaluation test process.

evaluation items Example comparative example density 1.75 2.71 Aesthetics (texture, thickness) ◎ △ spreadability ◎ ○ High temperature insulation (℃) 44.1 40.6 Low temperature insulation (℃) 21.1 19.7 Condensation performance clear - fire safety Natural combustion without fire spread - Sound insulation (dB) 6.4 3.7 Stirrability ◎ △ Adhesion strength (MPa) 3.1 1.7 Tensile strength (MPa) 11.4 8.3 Total volatile organic compounds (mg/m ² ·h) 0.407
(Standard: 2.5 or less) - Toluene (mg/m ² ·h) Non-detection (standard: 0.08 or less) - Formaldehyde (mg/m ² ·h) 0.007 (standard: 0.02 or less) - ◎: Excellent, ○: Somewhat good, △: Normal

As shown in Table 1 and FIGS. 1 to 3, the coating composition of the present invention not only had good aesthetics, but also had excellent functional properties such as spreadability, heat insulation performance, sound insulation, agitation, adhesion and durability.

Preparation Example 2

In order to evaluate paint compositions of various compositions, paint compositions were prepared as shown in Table 2 below.

(Unit: g) Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 glass bubble 50 - 200 - 50 200 100 fiberglass 50 100 - - - - - airgel - - - 100 - - - EPDM rubber - 150 - 300 600 100 - NBR rubber 300 150 - - - - - NR rubber - - - - - - 150 SBR rubber - - - - - - 150 gypsum powder 50 50 50 50 50 50 50 methacrylic acid resin 270 270 350 270 100 350 270 inorganic additives 30 30 50 30 5 50 30 organic additives 100 100 150 100 85 150 100 pigment 10 10 10 10 10 10 10 water 140 140 190 140 100 90 140 Inorganic additives: iron oxide, titanium dioxide, silica
Organic additives: 1,2-benzisothiazolin-3-one, propylene glycol, hydroxypropyl methylcellulose

Experimental Example 2

The coating compositions of the prepared Examples and Comparative Examples were evaluated for aesthetics, spreadability, heat insulation, sound insulation, agitation, adhesive strength and tensile strength in the same manner as in Experimental Example 1. The evaluation results were shown in Table 3 below.

evaluation items Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 aesthetic ◎ ◎ △ △ ○ ◎ ○ spreadability ◎ ◎ ○ ○ ◎ ◎ ○ High temperature insulation (℃) 42.5 43.6 43.2 40.2 43.1 43.7 41.5 Low temperature insulation (℃) 20.7 20.8 20.5 20.3 19.9 21.2 20.9 sound insulation 6.1 5.9 4.8 4.1 5.5 5.6 5.7 Stirrability ◎ ◎ ○ △ ○ ○ ◎ Adhesion strength (MPa) 2.6 3.1 2.2 2.5 2.5 3 2.6 Tensile strength (MPa) 11.4 11.2 10.4 9.3 11 10.8 10.2 ◎: Excellent, ○: Somewhat good, △: Normal

As shown in Table 3, the coating compositions of Examples in which glass fibers were used or NBR rubber was mixed showed excellent properties as well. On the other hand, the paints of Comparative Examples in which airgel was used instead of glass ceramics or rubber materials were omitted had slightly reduced heat insulation, sound insulation, and adhesive strength. The paints of the comparative examples using too much or too little of the rubber material also exhibited some deterioration in physical properties. The physical properties of the comparative examples using rubbers other than EPDM and NBR were also somewhat deteriorated. The above has been described with reference to the examples of the present invention, but these are merely examples and are not intended to limit the present invention, and are common knowledge in the field to which the present invention belongs. Those who have will know that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the embodiments of the present invention. For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (4)

20-50 wt% rubber;
0 or 1-15 wt% gypsum;
20-70 wt% of additives; and
Including the remaining amount of moisture,
The rubber includes at least one of EPDM rubber and NBR rubber of 20-120 mesh,
The additive is
A resin additive containing at least one of an acrylic resin, a urethane resin, an epoxy resin, and an EVA resin;
inorganic additives including at least one of iron oxide, titanium dioxide and silica; and
An organic additive comprising at least one of benzisothiazolinone, propylene glycol and hydroxypropyl methylcellulose.
paint composition. The method of claim 1,
The EPDM rubber or NBR rubber is produced by a low-temperature grinding method or a millstone grinding method at -300-10 ° C.
paint composition. The method of claim 1,
Satisfying at least one of the following (1) to (4)
paint composition.
(1) Sound insulation: 4 dB or more
(2) Adhesive strength: 2 MPa or more
(3) Tensile strength: 10 MPa or more
(4) Density: 3.0 g/cm ³ or less The method of claim 1,
Used for one or more purposes selected from the group consisting of painting, insulation, sound insulation, coating, painting, art, dyeing and adhesion
paint composition.

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