KR101491674B1 - Chassis and method for producing the same - Google Patents

Abstract

The present invention relates to a chassis and a method for manufacturing the same and, more specifically, to a method for manufacturing a chassis which comprises a washing step having a polyvinyl chloride chassis as a base material, removing impurities on the surface of the base material, and drying; an adhesive layer coating step coating an adhesive composition on the dried surface of the base material and forming an adhesive layer; a primary painting step painting by spraying a first painting composition containing a fluorine resin on the adhesive layer; a drying step of drying after primarily painting; a secondary painting step of painting by spraying a second painting composition on the upper part of the primary painting layer formed after drying; and a natural drying step after the secondary painting step, thereby significantly improving discoloration resistance and durability and providing chassis having various colors.

Description

≪ Desc / Clms Page number 1 > CHASSIS AND METHOD FOR PRODUCING THE SAME <

The present invention relates to a chassis and a method of manufacturing the same. More particularly, the present invention relates to a chassis capable of realizing various colors while dramatically improving the discoloration and durability by providing a coating method of a chassis made of synthetic resin used as a construction window.

The general building chassis has been mainly extruded using aluminum or synthetic resin. Among these, the aluminum chassis is lightweight and has excellent durability and nonflammability, but has a disadvantage that the heat conductivity is high and the heat insulating property is low and condensation occurs on the indoor side in the winter season. On the other hand, a synthetic resin chassis (hereinafter referred to as a PVC chassis) is excellent in durability and airtightness, soundproofing and waterproofing performance, while the finished product is usually white in color, and when exposed to long term sunlight or high temperature and high humidity conditions, So that the reliability of the product is deteriorated.

On the other hand, in recent years, various products having various colors and patterns of sheets adhered to the surface of the chassis have been released to widen the selection range of consumers. These products are complicated in the process of attaching the sheet to the chassis in the manufacturing process, and the production cost is increased, which is uneconomical. After a long time, the sheet is detached or wrinkled from the chassis and the sheet is easily discolored have.

Korean Patent Publication No. 10-2011-0081483 (July 14, 2011)

In order to solve the above problems, it is an object of the present invention to provide a PVC chassis having various durability and discoloration resistance even when exposed to sunlight or high temperature and high humidity conditions for a long time, .

According to an aspect of the present invention, there is provided a method of manufacturing a polyurethane foam, comprising the steps of: applying a polyvinyl chloride chassis to a base material; coating an adhesive composition on the surface of the base material to form an adhesive layer; A second coating step of spraying and coating a second coating composition on the first coating layer formed after the drying, and a second coating step of coating the second coating composition on the first coating layer formed after the first coating, to provide.

In the chassis manufacturing method according to an embodiment of the present invention, the bonding composition includes a polyolefin compound containing at least one reactive functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an isocyanate group, an epoxy group and derivatives thereof can do.

In the chassis manufacturing method according to one embodiment of the present invention, the first coating composition containing the fluororesin may include an acrylic silicone resin emulsion, a fluororesin emulsion, and a solvent.

In the method of manufacturing a chassis according to an embodiment of the present invention, the first coating composition may contain 15 to 45% by weight of an acrylic silicone resin emulsion, 30 to 60% by weight of a fluororesin emulsion, and a residual amount of a solvent.

In the chassis manufacturing method according to an embodiment of the present invention, the acrylic silicone resin emulsion may have a solid content of 40 to 50% by weight.

In the chassis manufacturing method according to an embodiment of the present invention, the fluororesin emulsion may have a solid content of 30 to 50% by weight.

In the method of manufacturing a chassis according to an embodiment of the present invention, the solvent is selected from the group consisting of ethyl alcohol, isopropanol alcohol, normal butanol, methyl alcohol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether , Diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, and propylene glycol.

In the chassis manufacturing method according to an embodiment of the present invention, the primary paint layer may be formed on the adhesive layer in a thickness of 0.5 mm to 1.5 mm.

In the method of manufacturing a chassis according to an embodiment of the present invention, the primary coating composition may have a viscosity (20 ° C) of 15,000 to 35,000 cps.

In the method of manufacturing a chassis according to an embodiment of the present invention, the drying after the first coating may be performed using a far infrared ray heating apparatus at 70 to 90 ° C for 10 to 60 minutes.

In the chassis manufacturing method according to an embodiment of the present invention, the secondary coating composition may include an acrylic silicone resin emulsion, a fluororesin emulsion, and a solvent.

In the chassis manufacturing method according to an embodiment of the present invention, the secondary coating composition may further include any one or two or more additives selected from the group consisting of a dispersing agent, a smoothing agent, a slip agent, a wetting agent, a defoaming agent and a thickener have.

The method of manufacturing a chassis according to an embodiment of the present invention may further include a cleaning step of removing foreign matter on the surface of the substrate before the adhesive layer coating step and then drying.

In the method of manufacturing a chassis according to an embodiment of the present invention, it may further include a step of natural drying after the secondary painting step.

The present invention provides a chassis manufactured by the above-described chassis manufacturing method. At this time, the chassis may be a building chassis.

The method of manufacturing a chassis according to the present invention has a problem of deteriorating quality such as an increase in the cost due to the use of the sheet and the use of the sheet due to the use of the sheet for providing various colors and patterns on the surface of the chassis, There is an advantage that it can be solved by a simple method. Particularly, the chassis manufactured by the chassis manufacturing method according to the present invention improves the adhesion with base material synthetic resin to realize various colors, and can realize excellent durability and color discoloration even when exposed to long-term sunlight or high temperature and high humidity conditions . In addition, the chassis has a high-quality appearance and is excellent in mechanical properties such as tensile strength, rigidity, impact strength, scratch resistance and hardness.

Hereinafter, a chassis manufacturing method of the present invention and a chassis manufactured by the manufacturing method will be described in detail. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. It will be apparent to those skilled in the art that, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, And a description of the known function and configuration will be omitted.

The inventors of the present invention have conducted studies to maximize the resistance to discoloration and durability when the polyvinyl chloride chassis is exposed to high temperature and high humidity for a long period of time and also to realize a high quality appearance and various colors. As a result, the polyvinyl chloride chassis There is provided a manufacturing method comprising forming an adhesive layer on a substrate surface using a specific adhesive composition and forming a coating layer of at least two layers by using a coating composition containing a fluororesin on the adhesive layer, Durability, high quality appearance and mechanical property synergism as well as various color implementations, and completed the present invention.

A chassis manufacturing method according to the present invention is a chassis manufacturing method comprising: an adhesive layer coating step of coating an adhesive composition on a substrate surface of a polyvinyl chloride chassis to form an adhesive layer; spraying a first coating composition containing a fluororesin on the adhesive layer A second coating step of spraying the second coating composition onto the first coating layer formed after the first coating step, and a second coating step of coating the second coating composition on the first coating layer formed after the first coating step.

The term " polyvinyl chloride chassis " in the present invention means a chassis made of synthetic resin, which is applied to a window such as a balcony, unless otherwise specified, and is not limited to polyvinyl chloride. Preferably, the chassis is a polyvinyl chloride-based material, and is an extruded product made of polyvinyl chloride (PVC), for example, a high chassis.

Since polyvinyl chloride chassis is usually molded by extruding white resin, products have a white appearance, which limits the ability to meet the demands of a dignified and high quality consumer. Thus, a method of laminating films having various colors and patterns has been proposed. However, there is a problem that the durability and discoloration resistance are not excellent and the film adhered to the surface is peeled off or peeled off to further deteriorate the appearance. Accordingly, the present invention provides a method of coating a polyvinyl chloride chassis using a coating composition capable of realizing various colors. At this time, various colors can be realized by forming a coating film on the polyvinyl chloride chassis base material by using the above-mentioned coating process. However, the coating film formed on the surface of the polyvinyl chloride chassis base material is easily cracked, scratch resistance, hardness, There is a problem in that the mechanical properties of the resin are deteriorated. To overcome this problem, the present invention includes an adhesive layer coating step of forming an adhesive layer by coating an adhesive composition on the substrate surface. The adhesive layer not only improves physical properties such as mechanical properties, discoloration resistance and weather resistance of a coating film formed using a coating composition on a substrate, but also improves adherence to a substrate remarkably to ensure long-term durability.

The adhesive layer coating step may further include a cleaning step of removing foreign substances on the surface of the chassis base before drying.

In the present invention, the adhesive composition comprises a solvent component and a resin. The solvent component of the adhesive composition includes an organic solvent or a mixture of solvents, and conventional ones can be used. For example, the solvent may be selected from among glycols, esters, ether-esters, glycol-esters, ether-alcohols, aliphatic hydrocarbons, aromatic hydrocarbons, ketones, It does not.

The resin comprises a polyolefin. The polyolefin may include at least one reactive functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an isocyanate group, an epoxy group, and derivatives thereof. When the reactive functional group-containing polyolefin is included, the adhesion between the chassis base and the coating layer formed by the coating composition, that is, the coating layer formed by the coating composition, can be improved and the effect of increasing the physical properties of the coating layer can be realized. More preferably, oligomers or reaction products of polymers and polyolefins. At this time, the oligomer or polymer may be selected from acrylic, ester, and urethane compounds, but is not limited thereto. For example, the oligomer or the reaction product of the polymer and the polyolefin may be prepared by grafting a polyolefin having a reactive functional group to an oligomer or polymer.

In the present invention, the polyolefin may have a weight average molecular weight of 50,000 to 300,000 g / mol. And preferably 200,00 to 250,000 g / mol. When the weight average molecular weight is satisfied, adhesion and workability are excellent. Further, it may have a melting point of 85 to 110 캜. The polyolefin may be selected from the group consisting of, for example, polyethylene, polypropylene, polybutylene, and mixtures thereof.

The present invention forms an adhesive layer by coating the adhesive composition on the surface of a polyvinyl chloride chassis substrate. At this time, the coating can be carried out at room temperature and can be carried out by a conventional coating method. For example, dip-coating, gravure coating, tape casting, curtain coating, slot die coating, meniscus coating, And spray coating, but are not necessarily limited thereto.

Thereafter, a first coating step of spraying and painting a first coating composition containing a fluororesin is carried out on the adhesive layer. The first coating composition may be a coating composition comprising a fluororesin. Preferably, the first coating composition may include an acrylic silicone resin emulsion, a fluororesin emulsion, and a solvent. As a specific example, the first coating material composition may be a chlorotrifluoroethylene resin which is a solvent-type fluororesin. This can achieve not only a desired effect of the present invention such as discoloration resistance and durability during the formation of a coating film but also a synergistic effect of increasing the physical properties of adhesion, water resistance, alkali resistance and stain resistance.

The first coating composition preferably comprises 20 to 35% by weight of an acrylic silicone resin emulsion, 15 to 25% by weight of a fluororesin emulsion, 5 to 10% by weight of a solvent, 20 to 50% by weight of water, 0.1 to 5% by weight of a surfactant, 0.5 to 5% by weight of wax. The acrylic silicone resin emulsion may be prepared by radical copolymerization of a silicon-containing acrylic monomer and other monomers copolymerizable therewith. The silicon-containing acrylic monomer may be at least one selected from the group consisting of γ- (meth) acryloxypropyltrimethoxysilane, γ- (meth) acryloxypropyltriethoxysilane, γ- (meth) acryloxypropylmethyldimethoxysilane, Containing vinyl-based monomers such as acryloxypropylmethyldiethoxysilane, and the like, but are not limited thereto. Examples of other monomers copolymerizable with the silicon-containing acrylic monomer include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, (Meth) acrylic monomers containing an acrylic group such as (meth) acrylate and cyclohexyl (meth) acrylate; Hydroxyl group-containing (meth) acrylic monomers such as 2-hydroxyethyl (meth) acrylate; Ethylenically unsaturated carboxylic acids such as (meth) acrylic acid; Amino group-containing (meth) acrylic monomers such as dimethylaminoethyl (meth) acrylate and dimethylaminopropyl (meth) acrylate; Amide-containing (meth) acrylic monomers such as (meth) acrylamide and ethyl (meth) acrylamide; Nitrile group-containing (meth) acrylic monomers such as acrylonitrile; And (meth) acrylic monomers containing an epoxy group such as glycidyl (meth) acrylate, and the like, but are not limited thereto.

Commercially available acrylic silicone resin emulsions may be used, and those prepared by conventional methods such as an emulsion polymerization method may be used.

In the present invention, the content of the acrylic silicone resin emulsion in the first coating composition is preferably 15 to 45% by weight. When the amount is less than 15% by weight, the hardness of the coating film is insufficient, and when it is more than 45% by weight, the adhesive strength may be lowered.

The acrylic silicone resin emulsion preferably has a solid content of 40 to 50% by weight. When the above range is satisfied, excellent durability and discoloration resistance can be achieved and a high-quality appearance can be realized.

The fluororesin emulsion may be prepared by radical copolymerization of a fluorine-containing acrylic monomer and another monomer copolymerizable with the fluorine-containing acrylic monomer.

Examples of the fluorine-containing acrylic monomer include trifluoroethyl (meth) acrylate, pentafluoropropyl (meth) acrylate, and perfluorocyclohexyl (meth) acrylate.

Examples of other monomers copolymerizable with the fluorine-containing acrylic monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, (Meth) acrylate and cyclohexyl (meth) acrylate; Hydroxyl group-containing (meth) acrylic monomers such as 2-hydroxyethyl (meth) acrylate; Ethylenically unsaturated carboxylic acids such as (meth) acrylic acid; Amino group-containing (meth) acrylic monomers such as dimethylaminoethyl (meth) acrylate and dimethylaminopropyl (meth) acrylate; Amide-containing (meth) acrylic monomers such as (meth) acrylamide and ethyl (meth) acrylamide; Nitrile group-containing (meth) acrylic monomers such as acrylonitrile; And (meth) acrylic monomers containing an epoxy group such as glycidyl (meth) acrylate, and the like, but are not limited thereto.

The fluororesin emulsion may be commercially available or may be prepared by a conventional method such as an emulsion polymerization method.

In the first coating composition of the present invention, the content of the fluororesin emulsion may be 30 to 60% by weight. When the above range is satisfied, mechanical properties such as adhesion strength, hardness, strength and scratch resistance of the coating film are excellent.

The solid content of the fluororesin emulsion may be 30 to 50% by weight. When the above-mentioned range is satisfied, long-term durability and discoloration resistance are excellent as well as the above-mentioned adhesive force, mechanical properties and the like.

In the first coating composition, the content ratio of the acrylic silicone resin emulsion and the fluororesin emulsion is not particularly limited, but the weight ratio of the solid content in the acrylic silicone resin emulsion and the fluororesin emulsion is preferably 1: 0.5 to 1: 1.5, 1: 0.8 to 1: 1.

The solvent may be conventional ones but is preferably selected from the group consisting of ethyl alcohol, isopropanol alcohol, normal butanol, methyl alcohol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono Butyl ether, ethylene glycol monobutyl ether, propylene glycol, and the like, but not always limited thereto.

The content of the solvent is preferably 5 to 10% by weight.

The first coating composition may contain water for viscosity control. At this time, the content of water is not limited, but it may preferably be 20 to 50% by weight in the composition.

In addition, the first coating composition may contain a surfactant to lower the surface tension and increase the wettability. At this time, the surfactant is preferably, but not necessarily, a polyoxyalkylene alkyl ether surfactant. The polyoxyalkylene alkyl ether surfactant is an eco-friendly material containing no alkylphenol, and examples thereof include polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene cetyl ether, and polyoxyethylene stearyl ether. have. The content of the surfactant may be preferably 0.1 to 5% by weight. When the range is satisfied, the smoothness of the coating film is excellent.

In addition, the first coating composition may further include an enamel paint. That is, by including the enamel paint, corrosion resistance and weather resistance of the coating layer can be improved. In this case, the content of the enamel paint may be 5 to 45% by weight in the first coating composition, but is not limited thereto.

In the present invention, it is also possible to replace the first coating composition with an enamel paint in the acrylic silicone resin as another embodiment.

In the present invention, the first coating step is a step of spraying the first coating composition, and preferably, the first coating composition can be applied at a viscosity (20 ° C) of 15,000 to 35,000 cps. When the above range is satisfied, the first paint layer formed after spraying is uniform and has excellent smoothness, and an excellent adhesive force can be realized.

In addition, the primary coating layer is preferably formed on the adhesive layer in a thickness of 0.5 mm to 1.5 mm. When the above range is satisfied, not only the mechanical properties of the coating film but also the adhesion increasing effect can be achieved.

After the primary coating, drying is performed. The drying improves the adhesion strength of the coating film, and then the physical property increase effect according to the second coating process can be realized. In addition to excellent coloring property, long term durability and discoloration resistance can be realized. At this time, drying can be carried out using a far-infrared ray heating apparatus at 70 to 90 ° C for 10 to 60 minutes. If the drying temperature is out of the range, long-term durability and discoloration resistance may be deteriorated and long-term reliability may be deteriorated.

The chassis that has undergone the drying after the primary coating is subjected to a secondary coating process in which the second coating composition is sprayed onto the upper portion of the first coating layer formed after drying. Formation of the first coating layer is insufficient in improving durability and discoloration resistance when exposed to the outside for a long period of time. In order to give a high-quality appearance, a combination of forming an adhesive layer using a specific adhesive composition and forming a second paint layer using the second paint composition simultaneously with the combination of the first paint layer with the first paint composition Respectively. The second coating composition may be the same as the first coating composition including the pigment, and may be applied to the coating process by adjusting the viscosity as required.

At this time, the second coating composition may contain at least one additive selected from the group consisting of a dispersing agent, a smoothing agent, a slipping agent, a wetting agent, a defoaming agent and a thickening agent, if necessary.

After the secondary coating process, the second coating layer is formed through drying. At this time, the drying may preferably be natural drying. In case of drying by heat such as hot air rather than natural drying, mechanical properties such as durability and stiffness and hardness of the coating film may decrease, and it is more preferable to perform natural drying for 12 to 48 hours.

The present invention provides a chassis manufactured by the above-described chassis manufacturing method.

Hereinafter, the present invention will be described more specifically with reference to the following examples. However, these embodiments are provided for the purpose of helping understanding of the present invention, but the present invention is not limited thereto.

(Example 1)

As a substrate, a PVC chassis product was used. The PVC chassis product was dried after a pretreatment process in which foreign substances were removed and then washed. At this time, drying was carried out at room temperature (25 캜) so as not to be deformed by heat. 20 wt% of a polybutylene resin (weight average molecular weight: 100,000 g / mol) having an amount of carboxylic anhydride groups of 200 μeq / g, 60 wt% of toluene, a wet dispersant (BYK-163) 1% by weight, xylene 28% by weight, and an anti-settling agent (Aerosil Fumed Silica) 1% by weight was spray-coated to a dry film thickness of 100 μm and dried at room temperature for 10 minutes to form an adhesive layer. On the adhesive layer, an acrylic silicone resin emulsion (KCC, monomer composition = methyl methacrylate / n-butyl acrylate / methacrylic acid / gamma-methacryloxypropyltrimethoxysilane = 40 / 53.5 / , A solid content of 50% by weight), 40% by weight of a fluororesin emulsion (40% by weight of solid content) and 25% by weight of ethylene glycol monobutyl ether was sprayed to a dry film thickness of 0.5 mm , And dried by heating at 80 캜 for 30 minutes. Thereafter, a second coating composition containing 3% by weight of carbon black was applied to 97% by weight of the first coating composition, spray-coated to a dry film thickness of 0.8 mm, and dried naturally at room temperature (25 ° C) for 4 hours. The spray coating allowed the compressed air pressure to be maintained in the range of 5 to 10 kg / cm < ^{3 &} gt ;. The prepared coating samples were evaluated for physical properties as described below, and the results are shown in Table 1.

(Example 2)

The same procedure as in Example 1 was carried out except that 15 wt% of acrylic silicone resin emulsion, 60 wt% of fluororesin emulsion and 25 wt% of ethylene glycol monobutyl ether were used as the first coating composition.

(Example 3)

The same procedures as in Example 1 were carried out except that 50 wt% of acrylic silicone resin emulsion, 25 wt% of fluororesin emulsion and 25 wt% of ethylene glycol monobutyl ether were used as the first coating composition.

(Example 4)

The coating was carried out in the same manner as in Example 1, except that the drying temperature was 50 캜 after the first coating.

(Example 5)

The procedure of Example 1 was repeated, except that the drying temperature was set at room temperature after the first coating and the drying temperature was 80 ° C after the second coating.

(Comparative Example 1)

The procedure of Example 1 was repeated except that the step of forming the adhesive layer using the adhesive composition was not carried out.

(Comparative Example 2)

The procedure of Example 1 was repeated except that 60 wt% of fluororesin emulsion and 40 wt% of ethylene glycol monobutyl ether were used as the first coating composition.

(Property evaluation)

(1) Appearance: The appearance of the surface of the coating film was evaluated visually. A " indicates that the appearance is good, and " x " indicates that an abnormality or a gloss abnormality of the protrusion is confirmed even at one point.

(2) Adhesiveness: After preparing the specimen, 11 lines were drawn horizontally and vertically on the dried test piece coating film in a cross shape with a gap of 1 mm, and a tape was stuck thereon and then peeled off and 100 pieces of coating The adhesive force was evaluated as the number of remaining pieces. The larger the number of the remaining pieces, the better the adhesion.

(3) Hardness: Measured by the pencil hardness method of JIS K5400 (8.4.1). The pencil hardness method was examined to determine the degree of scratching when the coating was applied to the coated specimen at a 45 'angle. At this time, the hardness becomes higher as 4H goes, and the hardness becomes lower as 3B goes down.

(4) Impact resistance: A weight of 1 kg was dropped from a 50 cm height onto a coating film with a DuPont impactor to measure the state of the coating film. &Amp; cir & indicates that no cracks or cracks were found in the coating film, and x indicates that cracks or cracks were confirmed even at one point

(5) Weatherability: The test was carried out according to the accelerated weathering test method of KSM 5000-3231. After 2,000 hours, the degree of chalking, gloss retention, and color difference were observed. And the degree of the degree was evaluated.

As can be seen from Table 1, Examples 1 to 5 according to the present invention exhibited high quality appearance and excellent adhesion as compared with Comparative Examples 1 and 2. Also, it was confirmed that excellent weatherability can be realized without deterioration of physical properties such as discoloration or gloss decrease even when exposed to the external environment for a long time, because the physical properties of the coating film are excellent according to hardness and impact resistance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible in light of the above teachings.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (17)

A bonding composition comprising a polyolefin compound and a solvent containing at least one reactive functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an isocyanate group, an epoxy group, and a derivative thereof and the like is coated on the substrate surface of a polyvinyl chloride chassis An adhesive layer coating step of forming an adhesive layer,
A first coating step of spraying and coating a first coating composition containing a fluororesin on the adhesive layer,
A drying step of drying after the primary coating, and
A second coating step of spraying and coating the second coating composition on the first coating layer formed after the drying step
Wherein the chassis is made of a metal. delete The method according to claim 1,
Wherein the first coating composition containing the fluororesin comprises an acrylic silicone resin emulsion, a fluororesin emulsion, and a solvent. The method of claim 3,
Wherein the first coating composition comprises 15 to 45% by weight of an acrylic silicone resin emulsion, 30 to 60% by weight of a fluororesin emulsion, and a residual amount of a solvent. The method of claim 3,
Wherein the acrylic silicone resin emulsion has a solid content of 40 to 50 wt%. The method of claim 3,
Wherein the fluororesin emulsion has a solid content of 30 to 50 wt%. The method of claim 3,
The solvent is selected from the group consisting of ethyl alcohol, isopropanol alcohol, normal butanol, methyl alcohol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, Propylene glycol, and propylene glycol. The method according to claim 1,
Wherein the first coating layer is formed on the adhesive layer in a thickness of 0.5 mm to 1.5 mm. The method according to claim 1,
Wherein the first coating composition has a viscosity (20 DEG C) of 15,000 to 35,000 cps. The method according to claim 1,
Wherein the drying after the primary coating is performed at 70 to 90 占 폚 for 10 to 60 minutes using a far-infrared heating apparatus. The method according to claim 1,
Wherein the second coating composition comprises an acrylic silicone resin emulsion, a fluororesin emulsion, and a solvent. The method according to claim 1,
Wherein the first coating composition further comprises an enamel paint. The method according to claim 1,
Wherein the second coating composition further comprises an enamel paint. The method according to claim 1,
Wherein the second coating composition further comprises one or more additives selected from the group consisting of a dispersing agent, a smoothing agent, a slipping agent, a wetting agent, a defoaming agent and a thickening agent. The method according to claim 1,
Further comprising a cleaning step of removing foreign substances on the surface of the substrate before the adhesive layer coating step and then drying. The method according to claim 1,
Further comprising the step of naturally drying the second coating. A building chassis manufactured by the manufacturing method according to any one of claims 1 and 3 to 16.