KR102218074B1 - Coating method for waterproofing materials containing polyurea resin for salt damage - Google Patents

Abstract

The present invention relates to a construction method for a waterproof material of a polyurea resin coating for preventing salt damage and, more specifically, to a construction method for a waterproof material of a polyurea resin coating for preventing salt damage, which applies a primer layer, a wire mesh layer, a foundation layer, an intermediate layer, and a coating layer to concrete, thereby having excellent attachment properties, thermal stability, chemical resistance, wear resistance, surface hardness, and dew condensation prevention.

Description

Construction method of polyurea resin coating waterproofing material for salt damage prevention {COATING METHOD FOR WATERPROOFING MATERIALS CONTAINING POLYUREA RESIN FOR SALT DAMAGE}

The present invention relates to a method of constructing a waterproofing material for a polyurea resin coating film for preventing salt damage, and more specifically, by applying a primer layer, a wire mesh layer, a base layer, a middle layer, a top layer and a coating layer on concrete, excellent adhesion properties, thermal stability and The present invention relates to a method of constructing a polyurea resin coating waterproofing material for preventing salt damage that has excellent chemical resistance, abrasion resistance, surface hardness, and condensation prevention.

In general, in order to prevent corrosion or damage caused by moisture such as concrete structures, dome structures, roofs of buildings such as factories or gymnasiums, water purification ponds, drainage basins, waterworks, industrial facilities, floors of general warehouses, etc. It is required to do. This coating treatment is generally performed by applying a polymer resin to the surface of a concrete structure.

On the other hand, in order to effectively waterproof the concrete surface, when polyurea is applied to a concrete structure containing moisture, bubbles, pinholes, and lifting phenomena occur, leading to poor construction quality and poor durability.

The occurrence of adhesion damage of the intermediate layer is deeply related to the surface quality of the concrete and the wet state, and as a porous heterogeneous material, the inherent material properties of concrete, which contain moisture and have water permeability, are the main factors. Specifically, stress caused by physical and chemical factors in the composite of the synthetic resin and concrete applied to the concrete surface, the pore solution of concrete, etc., are the causes of adhesion damage. In other words, the water vapor pressure, capillary suction force, and penetration pressure generated at the adhesive interface of the concrete cladding cause adhesion damage to each other due to relatively small stresses due to the concentration of stress in the weak or defective part of the interface.

Conventional waterproofing coatings are susceptible to condensation and are often penetrated into the lower part of the coating layer due to humidity. In addition, it contains a large amount of heavy metals that the coating waterproofing material has, which is very harmful to the human body and pollutes the surrounding environment.

In addition, air or underwater structures such as harbor structures made of concrete or steel or steel, underground structures, exposed structures, bridge structures that are frequently subjected to repeated dry and humid reactions, structures that have chemically eroded by calcium chloride, SOx, NOx, etc. Durability is degraded by contaminated air as well as weather environments such as rain, wind, snow, and sunlight, and durability is deteriorated by salts or chlorides present in salt water.

In particular, when salt or chloride penetrates and diffuses into the structure, concrete and reinforcing bars are corroded early, and as the chloride attracts a large amount of moisture, the structure leads to volume expansion, causing cracking and peeling, and proper maintenance. Failure to do so may lead to collapse. This occurs in cases where chloride adheres to underwater structures and concrete surfaces, as well as structures directly exposed to snow melting and melting agents commonly used in winter.

Accordingly, there is a need for research and development on a coating composition for preventing salt damage, and there is a need for improvement because there are often cases where the edge portion of the wall surface or the lifting phenomenon between the bottom surface and the side surface occurs after being coated on the coated film body.

Reference 1: Korean Registered Patent Publication No. 10-1141629 (Name of invention: silane-modified polyurea resin coating waterproofing material containing silane compound to improve adhesion performance and durability on wet surfaces, and waterproofing and anticorrosive method using the same) Reference 2: Korean Patent Publication No. 10-1998601 (Name of the invention: Polyurea resin coating waterproofing material for spraying and rolling coating) Reference 3: Korean Registered Patent Publication No. 10-1974533 (Name of invention: Polyurea resin coating waterproofing material and its manufacturing method, waterproofing construction method using the same) Reference 4: Korean Registered Patent Publication No. 10-2056574 (Name of invention: Polyurea coating waterproofing material with heat shielding performance and waterproofing construction method using the same) Reference 5: Korean Laid-Open Patent Publication No. 10-2020-0001241 (Name of the invention: Polyurea resin paint composition for explosion-proof and earthquake-proof waterproofing material having flame retardancy and its manufacturing method)

The present invention is to solve the conventional problems as described above, a first step of applying a primer layer on a base surface of concrete, a second step of disposing a wire mesh on the primer layer, the primer layer and the wire A third step of treating a base layer on the top of the mesh, a fourth step of applying a middle layer on the base layer, a fifth step of applying a top coat layer on the middle layer, a second step of applying a coating layer on the top coat layer An object of the present invention is to provide a method of constructing a waterproofing material for a polyurea resin coating film for preventing salt damage, including step 6 and a seventh step of inspecting defects, hardening degree, and thickness of the upper part of the coating layer.

The construction method of the waterproofing material of the polyurea resin coating film for preventing salt damage of the present invention comprises: a first step of applying a primer layer on concrete; A second step of arranging a wire mesh over the primer layer; A third step of forming a base layer over the primer layer and the wire mesh; A fourth step of applying an intermediate layer on the base layer; A fifth step of applying a top coat layer on the intermediate layer; A sixth step of applying a coating layer on the top coat layer; And a seventh step of inspecting whether or not an upper portion of the coating layer is defective, a degree of hardening, and a thickness.

The primer layer of the first step is 1 to 10 parts by weight of dimethyl carbonate, 5 to 10 parts by weight of (3-glycidyloxypropyl) trimethoxysilane, (chloromethyl) oxylane and 4,4'-(1- Methylethylidene) bisphenol polymer 45 to 50 parts by weight, 2,6-di-tert-butyl-4-methylphenol 20 to 30 parts by weight, 4-methyl-2-pentanone 11 to 20 parts by weight, propylene glycol methyl It may include 1 to 10 parts by weight of ether and 5 to 20 parts by weight of carbon fiber.

In the arrangement of the wire mesh in the second step, a first wire mesh is disposed at a lower portion of one wall surface, and a second wire mesh is disposed at a lower rectangular corner of a vertically formed wall surface, and the first wire mesh is one of the wall surfaces. A wire mesh may be connected to and disposed on a side surface and an upper portion of the primer layer, and the second wire mesh may be disposed by connecting a wire mesh to both sides of a vertically formed wall surface and an upper portion of the primer layer.

In the third step, the base layer is ethylene diisocyanate 10 to 20 parts by weight, tetramethylbutane-1,4-diisocyanate 10 to 20 parts by weight, butanediol 10 to 20 parts by weight, triethanolamine 50 to 70 parts by weight, bisphenol A 10 to 30 parts by weight of an epoxy resin and 5 to 10 parts by weight of CaCO ₃ may be included.

In the fourth step, the intermediate layer is α-hydro,ω-hydroxypolyoxy (methyl-1,2-ethanediyl) and 1,1-methylenebis4-isocyanatobenzene and 1,3-propanediol, 2-ethyl-2-(hydroxymethyl) polymer 90 to 100 parts by weight, poly(propylene glycol) bis(2-aminopropyl ether) 1 to 10 parts by weight, (3-glycidyloxypropyl) trimethoxysilane 5 to 10 parts by weight, 5 to 10 parts by weight of methacrylic acid, 10 to 20 parts by weight of diethyltoluenediamine, 1 to 10 parts by weight of titanium dioxide, 1 to 10 parts by weight of silicon dioxide, 5 to 10 parts by weight of colloidal silica, It may contain 15 to 25 parts by weight of metamorphic silica and 5 to 15 parts by weight of aluminum oxide.

The coating layer of the sixth step may include 10 to 30 parts by weight of a pigment component.

The primer layer in the first step, the base layer in the third step, the intermediate layer in the fourth step, the top coat layer in the fifth step, and the coating layer in the sixth step further contain a condensation preventing component, and the condensation preventing component is acrylamide , Methacrylic acid, acrylic ester copolymer 35 to 40 parts by weight, dihydrogen monoxide 30 to 40 parts by weight, soda lime borosilicate glass 15 to 20 parts by weight, talc may include 5 to 10 parts by weight.

According to the construction method of the polyurea resin coating waterproofing material for preventing salt damage of the present invention, it is excellent in preventing condensation after the application process, preventing easily lifting at the boundary between the wall surface and the floor surface, heat resistance, adhesion characteristics, chemical resistance, abrasion resistance, There is an effect of excellent surface hardness.

In addition, according to the construction method of the polyurea resin coating waterproofing material for preventing salt damage of the present invention, the coating layer of the coating layer due to salt damage caused by adhesion of seawater particles loaded with a large amount of typhoons or monsoons to the coating waterproofing material on land. Can prevent corrosion or cracking.

1 is a flowchart showing a method of constructing a waterproofing material for a polyurea resin coating film for preventing salt damage according to the present invention.
Figure 2 shows a schematic diagram of a primer layer, a base layer, a middle layer, a top layer, and a coating layer are laminated on concrete in the present invention.
3 shows a schematic diagram of a wire mesh disposed under the wall surface of the present invention.
4 is a schematic view showing a wire mesh arranged at the lower edge of the vertical wall surface of the present invention.
5 shows a schematic diagram of the applicator of the present invention.
6 to 12 show test results of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art may easily implement the present invention. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein.

1 is a flowchart showing a method of constructing a waterproofing material for a polyurea resin coating film for preventing salt damage according to the present invention. As shown in Figure 1, the construction method of the polyurea resin coating waterproofing material for preventing salt damage of the present invention comprises: a first step (R10) of applying a primer layer on the base surface of concrete; A second step (R20) of disposing a wire mesh on the primer layer; A third step (R30) of treating a base layer over the primer layer and the wire mesh; A fourth step (R40) of applying an intermediate layer on the base layer; A fifth step (R50) of applying a top coat layer on the intermediate layer; A sixth step (R60) of applying a coating layer on the top coat layer; And a seventh step (R70) of inspecting whether or not an upper portion of the coating layer is defective, a degree of hardening, and a thickness.

Here, before applying the primer layer on the base surface of the concrete, it may include arranging the concrete base surface, confirming the structure and facilities, and establishing a construction plan. The step of arranging the concrete base surface can be cleaned by removing foreign substances from the base surface of the concrete and spraying it with air to maintain flatness. High-pressure air can be used as the air, and if necessary, high-temperature and high-pressure water can be sprayed to clean the concrete surface.

The primer composition for forming the primer layer in the first step may include a primer component and a filler component.

The primer component is 1 to 10 parts by weight of dimethyl carbonate, 5 to 10 parts by weight of (3-glycidyloxypropyl) trimethoxysilane, (chloromethyl) oxylane and 4,4'-(1-methylethylidene) ) Bisphenol polymer (4,4'-(1-methylethylidene) bisphenol polymer with (chloromethyl)oxirane) 45 to 50 parts by weight, 2,6-di-tert-butyl-4-methylphenol (2,6-Di-tert -butyl-4-methylphenol), 20 to 30 parts by weight, 4-methyl-2-pentanone 11 to 20 parts by weight, propylene glycol methyl ether 1 to 10 parts by weight, carbon fiber 5 to 20 parts by weight, toluene compound 10 to It may contain 20 parts by weight.

The 2,6-di-tert-butyl-4-methylphenol can be used to increase the antibacterial properties of the primer layer, and the toluene compound can reduce oxidation due to moisture by using a compound represented by the following formula (1). have.

[Formula 1]

The filler component is methacrylic acid ester (methacrylic acid ester) 5 to 10 parts by weight, polydimethylsiloxane (polydimethylsiloxane) 0.03 to 0.1 parts by weight, fluoropolymer (fluoropolymer) 0.3 to 0.9 parts by weight, colloidal silica (colloidal silica) ) 5 to 10 parts by weight and 15 to 25 parts by weight of modified silicate, 5 to 15 parts by weight of aluminum oxide, 15 to 25 parts by weight of metamorphic silica, Ca(OH) ₂ 5 to 15 parts by weight. In addition, the primer layer including the filler component may serve to protect the primer layer by providing durability as well as buffering against external impacts.

In the third step, the base layer is ethylene diisocyanate 10 to 20 parts by weight, tetramethylbutane-1,4-diisocyanate 10 to 20 parts by weight, butanediol 10 to 20 parts by weight, triethanolamine 50 to 70 parts by weight, bisphenol A may contain 10 to 30 parts by weight of an epoxy resin and 5 to 10 parts by weight of CaCO ₃ .

By applying the base layer of the present invention, holes, irregularities, and fine cracks that exist on the entire surface of concrete are kept smooth with the surface, and waterproofing, reinforcing the adhesion of the anticorrosive layer, suppressing pinholes, and forming a coating film of uniform thickness. I can. The base layer composition of the present invention, together with the primer layer, plays an important role in the quality of the intermediate layer after the coating film is formed. Therefore, if the base layer is additionally used with 1 to 5 parts by weight of plastic with strong corrosion resistance, 1 to 5 parts by weight of ceramic-coated carbon fiber, and 1 to 5 parts by weight of natural rubber with double-sided adhesive function to the base layer, the construction effect will be increased. Very large.

In addition, as shown in FIGS. 3 and 4, in the case of a boundary or a corner vertex of a wall, the adhesion treatment of the primer layer and the base layer may be immaturely treated. To compensate for this, it can be improved by using plastic, carbon fiber coated with ceramic, and natural rubber with double-sided adhesive function. On the other hand, by disposing a wire mesh between the floor and the wall surface to reduce the lifting phenomenon of the corner portion, it is possible to increase the adhesion between the primer layer and the base layer. The arrangement of the wire mesh will be described later.

The intermediate layer of the fourth step includes a waterproof component, and the waterproof component is α-hydro.ω.-hydroxypolyoxy(methyl-1,2-ethandiyl) and 1,1-methylenebis(4-iso Cyanatobenzene) and 1,3-propanediol, 2-ethyl-2-(hydroxymethyl) polymer (1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro -.omega.-hydroxypolyoxy(methyl-1,2-ethanediyl) and 1,1-methylenebis(4-isocyanatobenzene)) 90 to 100 parts by weight, poly(propylene glycol) bis(2-aminopropyl ether) (Poly(propylene glycol) bis (2-aminopropyl ether)) 1 to 10 parts by weight, (3-glycidyloxypropyl) trimethoxysilane 5 to 10 parts by weight, cyclohexane compound 5 to 15 parts by weight, methacrylic acid 5 to 10 Parts by weight, 10 to 20 parts by weight of diethyltoluenediamine, 1 to 10 parts by weight of titanium dioxide, 1 to 10 parts by weight of silicon dioxide, 5 to 10 parts by weight of colloidal silica, 15 to 25 parts by weight of metamorphic silica, 5 parts by weight of aluminum oxide It may contain to 15 parts by weight.

The cyclohexane compound is a compound represented by the following formula (2) having a methyl group in which hydrogen is substituted with fluorine to reduce cohesive strength to increase flexibility and may have water-repellent properties to moisture.

[Formula 2]

The intermediate layer of the present invention may be formed of multiple layers such as the first intermediate layer and the second intermediate layer, so that the waterproofing effect can be further enhanced with buffering properties. In addition, the first intermediate layer and the second intermediate layer may form multiple layers of the same component.

The top coat layer of the fifth step includes a top coat component, and the top coat component is α-hydro.ω.-hydroxypolyoxy(methyl-1,2-ethandiyl) and 1,1-methylenebis4-iso Cyanatobenzene and 1,3-propanediol, 2-ethyl-2-(hydroxymethyl) polymer (1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro- .omega.-hydroxypolyoxy(methyl-1,2-ethanediyl) and 1,1-methylenebis4-isocyanatobenzene) 90 to 100 parts by weight, (3-glycidyloxypropyl) trimethoxysilane 5 to 10 parts by weight, methacrylic Acid 5 to 10 parts by weight, diethyltoluenediamine 10 to 20 parts by weight, titanium dioxide 1 to 10 parts by weight, silicon dioxide 1 to 10 parts by weight, colloidal silica 5 to 10 parts by weight, metamorphic silica 15 to 25 parts by weight It may contain 5 to 15 parts by weight of aluminum oxide.

The coating layer of the sixth step may include a coating component and a pigment component. The coating component is 1 to 10 parts by weight of adipic acid copolymer, 1 to 10 parts by weight of dimethyl carbonate, 31 to 40 parts by weight of titanium dioxide, 11 to 20 parts by weight of n-butyl acetate, 7 to 10 parts by weight of tetrahydrofuran, propylene It may contain 1 to 10 parts by weight of glycol methyl ether acetate.

10 to 30 parts by weight of a pigment component may be used, and an organic pigment or an inorganic pigment may be used. Inorganic pigments are more preferable because they are superior to organic pigments in thermal stability, and white pigments (zinc oxide, titanium oxide, silver white, etc.), red pigments (Bengala, vermillion, cadmium red, etc.), yellow pigments (chromium yellow, ocher, cadmium, etc.) Yellow, etc.), green pigments (emerald rust, chromium oxide rust, etc.), blue pigments (Prussian blue, cobalt blue, etc.), black pigments (carbon black, iron black, etc.), transparent white pigments (silica white, alumina white, white earth, etc.) Calcium carbonate, etc.) can be used. The pigment component is used only in the outermost coating layer of the coating waterproofing material, thereby implementing the color of the coating waterproofing material in a small amount.

Meanwhile, the composition of the primer layer of the first step, the composition of the base layer of the third step, the composition of the intermediate layer of the fourth step, the composition of the top coat of the fifth step, and the composition of the coating layer of the sixth step are condensation preventing components. By further including, it is possible to obtain an effect of preventing condensation from occurring in the waterproofing material. This minimizes the generation of moisture by including a condensation prevention component in the entire layer of the waterproofing material to suppress the occurrence of mold.

The condensation preventing component of the present invention is dihydrogen monoxide 30 to 40 parts by weight, acrylamide, methacrylic acid, acrylic ester copolymer (Acrylamide, methacrylic acid, acrylic ester copolymer) 35 to 40 parts by weight, soda lime boro Polyurea vertical coating waterproofing material including 15 to 20 parts by weight of silicate glass (Soda lime borosilicate glass) and 5 to 10 parts by weight of talc may exhibit anti-condensation properties. In addition to the anti-condensation component, 5 to 10 parts by weight of silica gel, which is a desiccant, may be further mixed.

In the acrylamide, methacrylic acid, acrylic ester copolymer (Acrylamide, methacrylic acid, acrylic ester copolymer), the mixing of acrylamide, methacrylic acid, and acrylic ester is preferably in a molar ratio of 1:0.9 to 1.1:0.9 to 1.1. Here, as the acrylic ester, any one selected from methyl acrylate, ethyl acrylate, and butyl acrylate may be used. By using an acrylamide, methacrylic acid, or acrylic ester copolymer, it is possible to prevent condensation due to moisture generated from water vapor in the air when the temperature inside or on the surface of the wall or floor is below the dew point of the wet air.

When the soda lime borosilicate glass is used in the above range, it is possible to effectively prevent condensation due to temperature difference by uniform coating by improving flowability when coating a waterproofing material and having an insulating function.

The talc has a density of 2.7 to 2.8, has a structural formula of Mg ₃ (OH) ₂ Si ₄ O ₁₀ , and may be in a powder form. Due to the sliding properties of talc, it is possible to improve coating uniformity by providing flexibility when using a coating solution having a high viscosity to prevent condensation when coating a waterproofing material.

The anti-condensation component also has anti-salt properties, and thus can prevent cracking, lifting, peeling, etc. of the waterproofing material of the polyurea resin coating film against salt damage.

By using a wire mesh between the primer layer and the base layer of the present invention, it is possible to prevent the paint film waterproofing material from being lifted at the corners, and to increase the adhesion between the primer layer and the base layer. This will be described in detail below.

3 and 4 show schematic diagrams for arranging the wire mesh of the present invention. 3 is a schematic diagram of arranging a wire mesh on a lower side of a wall, and FIG. 4 is a schematic view of arranging a wire mesh at a rectangular corner portion.

As shown in FIG. 3, a part 40A of the first wire mesh contacts the wall surface 20A, and the remaining part 40C of the first wire mesh contacts the upper part of the primer layer 11 at 90 degrees. By arranging in this way, the coating of the polyurea resin coating waterproofing material for preventing salt damage can prevent lifting at the boundary between the concrete and the wall surface.

As shown in FIG. 4, the second wire mesh has a shape of a tetrahedron, three surfaces of the tetrahedron are formed with a wire mesh, and the other surface is not formed with a wire mesh. That is, some of the second wire mesh (30A, 30B) is in contact with the vertically formed wall (20A, 20B), respectively, and the remaining part (30C) of the second wire mesh is in contact with the upper portion of the primer layer. By arranging in this way, the coating of the polyurea resin coating waterproofing material for preventing salt damage can prevent lifting at the boundary of the lower edge of the wall surface formed perpendicular to the concrete.

In the construction process, either of the first wire mesh and the second wire mesh may be used, but the first wire mesh is used under the wall surface, and the second wire mesh is used together at the edge of the vertically formed wall surface. It is possible to reduce the lifting phenomenon while increasing the overall adhesion than using any one of the mesh and the second wire mesh.

In addition, as the first wire mesh and the second wire mesh, a single layer of wire mesh may be used, and two or more layers may be overlapped. In the first wire mesh of the present invention, a first layer of wire mesh 40A may be used for a surface in contact with the wall, and a second layer of wire mesh 40C may be used for a surface in contact with the upper portion of the primer layer. Likewise, the second wire mesh may use a first layer of wire mesh 30A and 30B as a surface in contact with the wall, and a second layer of wire mesh 30C as a surface in contact with the upper portion of the primer layer. Accordingly, it is more preferable in enhancing adhesion between the lower primer layer and the upper base layer, suppressing pinholes, and the like, while preventing lifting at the corners or sides. In addition, in the first wire mesh and the second wire mesh, it is attached that the number of single-line spaces that fit within one inch in the wire mesh on the surface in contact with the upper part of the primer layer than the wire mesh used in the surface in contact with the wall surface is increased. It is preferable for reinforcing properties and suppressing pinholes. For example, in the first wire mesh and the second wire mesh, a 9 to 10 wire mesh may be used for a surface in contact with a wall, and a 7 to 8 wire mesh may be used for a surface in contact with an upper portion of the primer layer.

The wire mesh of the present invention may be any one selected from metal, plastic, rubber, and carbon, but rubber is most preferred from the viewpoint of adhesion and flexibility. The wire mesh has a number of 4 to 15 spaces per line that fits within 1 inch, and more preferably, the wire mesh has an amount of 7 to 10 spaces per line that fits within an inch. That is, the wire mesh may use 7 to 10 wire mesh. If it is less than the above range, the hole of the wire mesh is too large, so that the polyurea resin-containing coating waterproofing material is lifted at the end, and if it exceeds the above range, the hole of the wire mesh is too small, and the amount of the viscous primer composition passing through the wire mesh. Due to this limitation, there is a disadvantage that a sufficient primer composition is not supplied between the wall surface and the wire mesh.

5, the primer layer 11, the base layer 12, the intermediate layer 13, the top layer 14, and the coating layer 15 on the concrete layer 10 using the application device of the present invention. Can be formed. Here, a wire mesh may be disposed between the primer layer 11 and the base layer 12. Here, the intermediate layer may be applied in a plurality of layers as the first intermediate layer and the second intermediate layer.

That is, the first step of forming the primer layer of the present invention, the third step of forming the base layer, the fourth step of forming the intermediate layer, the fifth step of forming the top coat layer, the sixth step of forming the coating layer, A first step of injecting the composition to be applied into the applicator body 41, respectively; A second process of heating the composition introduced by the first process in a heating unit 42; A third process of removing the pressure change in the injection pressure control unit controlling the pressure change to maintain the same spray pattern to the outside of the composition heated in the second process; And a fourth process of spraying the coating liquid by determining whether to open or close the pressure-controlled composition by the spray gun 47 through the spraying lake 45.

In the second process of the present invention, in order to improve the fluidity of the coating composition and the coating property after spraying, it may be heated to a temperature of 50°C to 80°C. The above conditions can be checked through the display unit 48.

In the third process of the present invention, while checking the first injection pressure check gauge 44 attached to the applicator body 41, the heated application composition is controlled by adjusting the first injection pressure control unit 43 to obtain a constant spray injection amount. You can control what is sprayed to the outside. In addition, while checking the second injection pressure check gauge 46 attached to the spray gun 47, the operator adjusts the second injection pressure control unit 49 attached to the spray gun 47 so that the operator can use the applicator body ( It is possible to control that the heated coating composition is sprayed to the outside with a constant spray amount while working without checking the first injection pressure confirmation gauge 44 attached to 41). By the first injection pressure control unit 43 and the second injection pressure control unit 49, it can be achieved by changing the degree of opening and closing of the valve.

In the fourth process of the present invention, when the spraying pressure of the spray gun is 2,000 psi to 3,000 psi, the nozzle diameter of the spray gun is 0.015 inch to 0.025 inch, and the direction perpendicular to the ground is defined as 90°, the spraying angle of the spray gun is 50° to 70° are preferred for uniform application of the application composition.

Before the spraying and coating operation of the present invention, check the temperature around the conductor (at an appropriate temperature condition 5℃ or higher) and humidity (at an appropriate humidity condition RH 80% or less), and the surface of the conductor is in a wet state such as condensation and moisture. In this case, it is desirable to dry it completely before working. In order to avoid painting on the condensed water vapor, it is desirable to work in a condition where the surface temperature is 3℃ or higher than the dew point.

(Example)

The concrete surface was cleaned by removing foreign substances from the concrete surface and spraying it with air. And, as a primer layer, dimethyl carbonate 0.5 kg, (3-glycidyloxypropyl) trimethoxysilane 0.7 kg, (chloromethyl) oxylane and 4,4'-(1-methylethylidene) bisphenol polymer 4.7 kg, 2,6-di-tert-butyl-4-methylphenol 2.4 kg, 4-methyl-2-pentanone 1.5 kg, propylene glycol methyl ether 0.5 kg, carbon fiber 1 kg, toluene compound of formula 1 1.5 kg, meta Acrylic acid ester 0.7kg, polydimethylsiloxane 0.005kg, fluoropolymer 0.05kg, colloidal silica 0.8kg, modified silicate 1.8kg, aluminum oxide 1kg, metamorphic silica 2kg, Ca(OH) ₂ 1kg and condensation component are mixed It was put in an applicator and applied to the top of concrete.

The upper primer layer and the rubber wire mesh were placed in contact with both sides of the rectangular corners of the wall made of a right angle, and the upper primer layer and the wire mesh made of rubber were placed in contact with one side of the wall.

As a base layer, 1.5 kg of ethylene diisocyanate, 1.5 kg of tetramethylbutane-1,4-diisocyanate, 1.5 kg of butanediol, 6 kg of triethanolamine, 2 kg of bisphenol A epoxy resin, 0.7 kg of CaCO ₃ and a condensation component were mixed to the coating device. Put and applied to the primer layer and the upper wire mesh.

As an intermediate layer, α-hydro.ω.-hydroxypolyoxy(methyl-1,2-ethandiyl) and 1,1-methylenebis(4-isocyanatobenzene) and 1,3-propanediol, 2 -Ethyl-2-(hydroxymethyl) polymer 9.5 kg, poly(propylene glycol) bis(2-aminopropyl ether) 0.5 kg, (3-glycidyloxypropyl) trimethoxysilane 0.7 kg, represented by Formula 2 Cyclohexane compound 1.3kg, methacrylic acid 0.7kg, diethyltoluenediamine 1.5kg, titanium dioxide 0.7kg, silicon dioxide 0.7kg, colloidal silica 0.7kg, metamorphic silica 1.8kg, aluminum oxide 1.3kg and condensation component It was mixed and put in a coating device and applied on the top of the base layer.

As a top coat layer, α-hydro.ω.-hydroxypolyoxy(methyl-1,2-ethandiyl) and 1,1-methylenebis4-isocyanatobenzene and 1,3-propanediol, 2-ethyl- 2-(hydroxymethyl) polymer 9.5 kg, (3-glycidyloxypropyl) trimethoxysilane 0.7 kg, methacrylic acid 0.7 kg, diethyltoluenediamine 1.5 kg, titanium dioxide 0.5 kg, silicon dioxide 0.5 kg, 0.5 kg of colloidal silica, 2 kg of metamorphic silica, 1 kg of aluminum oxide, and a condensation component were mixed and placed in an applicator and coated on the upper part of the intermediate layer.

As a coating layer, 1.5 kg of zinc oxide pigment, 0.5 kg of adipic acid copolymer, 0.5 kg of dimethyl carbonate, 3.7 kg of titanium dioxide, 1.5 kg of n-butyl acetate, 0.7 kg of tetrahydrofuran, 0.5 kg of propylene glycol methyl ether acetate, and condensation component Was mixed and put in an applicator and applied on the top of the top coat layer.

In the primer layer, the base layer, the intermediate layer, the top layer, and the coating layer, as a condensation component, dihydrogen monoxide 3.5 kg, acrylamide, methacrylic acid, acrylic ester copolymer 3.7 kg, soda lime borosilicate glass 1.7 kg, talc 0.8 kg Mixed.

Here, polytetrafluoroethylene was used as the fluoropolymer, and fluoroalkyl silicate was used as the modified silicate.

Comparative Example 1 had the same conditions except for the condensation preventing component in Example 1, and Comparative Example 2 had the same conditions except that a wire mesh was not used.

Example 1 Comparative Example 1 Comparative Example 2 Avoiding corners ○ ○ × Prevention of condensation ○ △ ○

The test results for the top coat layer are shown in FIGS. 6 to 12. That is, VOC, VACs-toluene, VAC-ethylbenzene, VAC-p-xylene, VAC-isopropylbenzene, VAC-1,2,4-trimethylbenzene, VAC-1,2,4,5-tetramethylbenzene It was confirmed that was not detected. In addition, it was confirmed that the solar reflectance (300nm~780nm) was 91.0%, the solar reflectance (780nm~2500nm) was 84.9%, and the solar reflectance (300nm~2500nm) was 86.8%, and there was no abnormality in the condensation performance test. It was confirmed that water permeability was not permeable.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same idea. It will be possible to easily propose other embodiments by changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

10: concrete
20A, 20B: wall
11: primer layer
12: base layer
13, 14: middle class
15: coating layer
30A,30B,30C,40A,40C: wire mesh
41: applicator body
42: heating unit
44,46: gauge for checking injection pressure
43,49: injection pressure control unit
45: the number of jets
47: spray gun
48: display unit

Claims (1)

A first step of applying a primer layer on concrete;
A second step of arranging a wire mesh over the primer layer;
A third step of forming a base layer over the primer layer and the wire mesh;
A fourth step of applying an intermediate layer on the base layer;
A fifth step of applying a top coat layer on the intermediate layer;
A sixth step of applying a coating layer on the top coat layer; And
It is a method of constructing a waterproofing material for a polyurea resin coating film for preventing salt damage, comprising a seventh step of inspecting whether or not an upper portion of the coating layer is defective, a degree of hardening, and a thickness,
The primer layer of the first step is 1 to 10 parts by weight of dimethyl carbonate, 5 to 10 parts by weight of (3-glycidyloxypropyl) trimethoxysilane, (chloromethyl) oxylane and 4,4'-(1- Methylethylidene) bisphenol polymer 45 to 50 parts by weight, 2,6-di-tert-butyl-4-methylphenol 20 to 30 parts by weight, 4-methyl-2-pentanone 11 to 20 parts by weight, propylene glycol methyl 1 to 10 parts by weight of ether, 5 to 20 parts by weight of carbon fiber,
In the arrangement of the wire mesh in the second step, a first wire mesh is disposed at a lower portion of one wall surface, and a second wire mesh is disposed at a lower rectangular corner of a vertically formed wall surface, and the first wire mesh is one of the wall surfaces. A wire mesh is connected to and disposed on the side surface and the upper portion of the primer layer, and the second wire mesh is disposed by connecting a wire mesh to both sides of a vertically formed wall surface and an upper portion of the primer layer,
In the third step, the base layer is ethylene diisocyanate 10 to 20 parts by weight, tetramethylbutane-1,4-diisocyanate 10 to 20 parts by weight, butanediol 10 to 20 parts by weight, triethanolamine 50 to 70 parts by weight, bisphenol A Including 10 to 30 parts by weight of an epoxy resin, 5 to 10 parts by weight of CaCO ₃ ,
In the fourth step, the intermediate layer is α-hydro,ω-hydroxypolyoxy (methyl-1,2-ethanediyl) and 1,1-methylenebis4-isocyanatobenzene and 1,3-propanediol, 2-ethyl-2-(hydroxymethyl) polymer 90 to 100 parts by weight, poly(propylene glycol) bis(2-aminopropyl ether) 1 to 10 parts by weight, (3-glycidyloxypropyl) trimethoxysilane 5 to 10 parts by weight, 5 to 10 parts by weight of methacrylic acid, 10 to 20 parts by weight of diethyltoluenediamine, 1 to 10 parts by weight of titanium dioxide, 1 to 10 parts by weight of silicon dioxide, 5 to 10 parts by weight of colloidal silica, Including 15 to 25 parts by weight of metamorphic silica, 5 to 15 parts by weight of aluminum oxide,
The coating layer of the sixth step contains 10 to 30 parts by weight of a pigment component,
The primer layer in the first step, the base layer in the third step, the intermediate layer in the fourth step, the top coat layer in the fifth step, and the coating layer in the sixth step further contain a condensation preventing component, and the condensation preventing component is acrylamide , Methacrylic acid, acrylic ester copolymer 35 to 40 parts by weight, dihydrogen monoxide 30 to 40 parts by weight, soda lime borosilicate glass 15 to 20 parts by weight, talc 5 to 10 parts by weight of salt for preventing poly Construction method of urea resin coating waterproofing material.

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