KR102784587B1 - Waterproofing Polyurea Resin Composition Having Excellent Physical properties such as Adhesion Construction Method for Foundation Structures Using the Same - Google Patents

Abstract

The present invention relates to a polyurea resin coating waterproofing composition having excellent physical properties such as adhesiveness, and a method for waterproofing a base structure using the same. More specifically, the present invention relates to a polyurea resin coating waterproofing composition having excellent adhesiveness and performance after thermal treatment as well as being economical, by including glycerol ester of talloil rosin, a natural emulsifier, in the soft segment of the coating, and a method for waterproofing a base structure using the same.

Description

{Waterproofing polyurea resin composition having excellent physical properties such as adhesion and construction method for waterproofing foundation structures using the same}

The present invention relates to a polyurea resin waterproofing film composition having excellent physical properties such as adhesiveness, and a waterproofing construction method for a base structure using the same. More specifically, the present invention relates to a polyurea resin waterproofing film composition having excellent adhesiveness and performance after thermal treatment by including glycerol ester of talloil rosin, a natural emulsifier, in the soft segment of the coating, and a waterproofing construction method for a base structure using the same.

Generally, waterproofing construction is performed on the surface of building structures such as roofs, floors, underground parking lots, and window frames of various building structures such as concrete structures, steel structures, and wood structures to prevent moisture from seeping in. This waterproofing construction is somewhat different depending on the construction site and waterproofing material, but generally, waterproofing is widely performed on the surface using waterproofing membranes, asphalt, sheets, etc. Recently, composite waterproofing construction that mixes these has also been performed.

Among them, the coating construction of a waterproofing film is a method of coating a two-component paint of polyurethane or epoxy series, and has the advantage of having few cracks and being easy to construct regardless of the structure or shape of the surface to be painted. However, since polyurea resin waterproofing film has a fast curing speed, it is generally constructed using high temperature and high pressure equipment. In this case, there is a disadvantage that pin holes or bubbles may occur in the film, and furthermore, problems such as adhesion may occur, making it difficult to expect perfect performance of the film.

As a method to solve these shortcomings, a common method is to apply a base conditioner to the undercoat and then apply a polyurea resin waterproofing coating, and then apply a topcoat when exposed to ultraviolet rays.

Meanwhile, various types of base conditioners are being used, including polyurethane, polyurethane mortar, epoxy, and epoxy mortar. Accordingly, there is a slight difference in the adhesiveness of the coating depending on the type.

The inventor of the present invention, while continuing his research on a polyurea resin coating waterproofing composition and a waterproofing construction method of a base structure using the same, discovered that the adhesion to the base structure is excellent and the performance is excellent after heat treatment by using a natural emulsifier to improve various surface tensions and adhesion to metal according to a base conditioner, thereby completing the present invention.

: Korean Patent No. 10-1996256 (registered on June 28, 2019) : Korean Patent No. 10-2310922 (registered on October 1, 2021) : Korean Patent No. 10-2612985 (registered on December 7, 2023) : Korean Patent No. 10-2145949 (registered on August 12, 2020)

The present invention was conceived to solve the above problems, and aims to provide a polyurea resin waterproofing coating composition having excellent physical properties such as adhesiveness and a method for waterproofing a base structure using the same.

In order to achieve the above-mentioned purpose, the present invention

A polyurea resin waterproofing coating composition comprising a main body and a hardener body,

The above-mentioned main component comprises 500 to 600 parts by weight of isocyanate, 400 to 500 parts by weight of polyether polyol having a molecular weight of 2,000 to 5,000, 50 to 100 parts by weight of plasticizer, 5 to 30 parts by weight of glycerol ester of tall oil rosin, which is a natural emulsifier, and 3 to 10 parts by weight of antifoaming agent, and is composed of an isocyanate prepolymer having an isocyanate residual ratio of 13 to 17%.

The present invention relates to a polyurea resin coating waterproofing material composition, characterized in that the above-mentioned hardening agent part comprises 700 to 800 parts by weight of polyetheramine having a molecular weight of 2,000 to 5,000, 180 to 250 parts by weight of diethyltoluenediamine (DETDA), and 5 to 15 parts by weight of a latent hardener.

In addition, the present invention relates to a waterproofing construction method for a base structure using a polyurea resin coating waterproofing composition, comprising: 1) a 1st step of cleaning and organizing the surface of a base structure; 2) a 2nd step of applying, as a primer, an oil-based two-component moisture-curing polyurethane or a water-based two-component acrylic-epoxy on the surface of the base structure organized in the 1st step; 3) a 3rd step of applying, as a primer conditioner, a two-component moisture-curing polyurethane, a two-component polyurethane-urea, or a two-component epoxy resin on the applied primer in the 2nd step; 4) a 4th step of applying, as a middle coat, a polyurea resin coating waterproofing composition on the base conditioner in the 3rd step to form a coating waterproofing layer; 5) The present invention relates to a method for waterproofing a base structure, characterized by including a fifth step of applying an oil-based two-component acrylic-urethane or a water-based two-component acrylic-urethane as a topcoat on the waterproofing layer of the fourth step.

Meanwhile, the means for solving other specific problems by the present invention are described in the detailed description of the invention.

The polyurea resin waterproofing film composition according to the present invention and the waterproofing construction method of a base structure using the same have the advantages of excellent adhesion and performance after heat treatment.

FIG. 1 is a cross-sectional view schematically showing one example of the structure of a waterproof coating formed by a method for waterproofing a base structure using a polyurea resin waterproof coating composition according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing one example of the structure of a waterproof coating formed by a method for waterproofing a base structure using a polyurea resin waterproof coating composition according to the present invention.

The present invention is a polyurea resin coating waterproofing composition comprising a main part and a hardener part, wherein the main part comprises 500 to 600 parts by weight of isocyanate, 400 to 500 parts by weight of polyether polyol having a molecular weight of 2,000 to 5,000, 50 to 100 parts by weight of a plasticizer, 5 to 30 parts by weight of glycerol ester of tall oil rosin, which is a natural emulsifier, and 3 to 10 parts by weight of an antifoaming agent, and is composed of an isocyanate prepolymer having an isocyanate residual rate of 13 to 17%.

The above-mentioned hardening agent is characterized by comprising 700 to 800 parts by weight of polyetheramine having a molecular weight of 2,000 to 5,000, 180 to 250 parts by weight of diethyltoluenediamine (DETDA), and 5 to 15 parts by weight of a latent hardener.

Below, each component of the present invention will be described in detail.

First, the polyurea resin coating waterproofing composition according to the present invention can be prepared by independently preparing the main part and the hardener part as two-component types and then mixing them in a volume ratio of 1:1.0 to 1.1 immediately before application. At this time, if the mixing ratio is less than 1.0, variables due to poor mixing of moisture and equipment occur, which not only slows down the curing speed of the polyurea resin coating waterproofing composition, but also causes problems such as a decline in the mechanical properties of the coating waterproofing material and a decrease in hardness. If it exceeds 1.1, the tensile strength and hardness increase and the coating surface condition is not smooth, which is not preferable.

The above-mentioned main component can be manufactured from an isocyanate prepolymer containing 500 to 600 parts by weight of isocyanate, 400 to 500 parts by weight of polyol having a molecular weight of 2,000 to 5,000, 50 to 100 parts by weight of a plasticizer, 5 to 30 parts by weight of glycerol ester of tall oil rosin, which is a natural emulsifier, and 3 to 10 parts by weight of an antifoaming agent, and having an isocyanate residual ratio of 13 to 17%.

Among the above components, the isocyanate may be at least two selected from monomeric MDI (Monomeric Methylene Diphenyl Diisocyanate), modified MDI, and polymeric MDI. The amount added is preferably 500 to 600 parts by weight. If the amount added is less than 500 parts by weight, the content of the hard portion decreases, which causes a problem in that the properties of the coating film are below the KS F 4922 standard value, and if it exceeds 600 parts by weight, there is a problem in that the tensile strength increases and the elongation decreases.

In addition, polyether polyol acts as a soft part of the polyurea resin coating waterproofing material composition, and has the effect of improving elongation and elasticity at low temperatures. The molecular weight is 2,000 to 5,000, and the types thereof include KPX Chemical Co., Ltd. PP-2000, GP-3000, SC2204, and Korea PTEG Co., Ltd. PTMEG 1000, and more than one type thereof can be used. It is preferable to add 400 to 500 parts by weight. If the molecular weight is less than 2,000, the flexibility and impact resistance become weak when the coating film is formed, and if it exceeds 5,000, the viscosity of the coating is high when the coating film is formed, so that the coating does not flow smoothly into the polyurea-only coating equipment, which may cause problems such as air pockets or non-drying. If the amount added is less than 400 parts by weight, there is a problem of reduced elongation of the coating film due to low soft content, and if it exceeds 500 parts by weight, there is a problem of low tensile strength of the coating film.

The plasticizer may be at least one selected from tris(2-chloroisopropyl)phosphate (Yoke, TCPP), non-phthalate series such as LG Chemical GL-300, and Huntsman TXIB. The amount added is preferably 50 to 100 parts by weight. If the amount added is less than 50 parts by weight, there are problems of decreased storage stability in winter and decreased elasticity, and if it exceeds 100 parts by weight, there are problems of increased elasticity and decreased tensile strength ratio after heat treatment.

The glycerol ester of the above natural emulsifier, tall-oil rosin, is used to improve various surface tensions and adhesion to metals according to the base conditioner. The types thereof include DRT Dertoline G2L or Dertoline G, and the addition amount is preferably 5 to 30 parts by weight. If it is less than 5 parts by weight, the adhesion to the material is reduced, and if it exceeds 30 parts by weight, the viscosity of the main agent increases, causing poor mixing with the hardener, and failing to exhibit the required properties.

The above-mentioned antifoaming agent is for removing air bubbles that may occur when mixed with the hardener, and BYK-0066N can be used, and the amount added is preferably 3 to 10 parts by weight. If it is less than 3 parts by weight, it is difficult to remove air bubbles that occur during manufacturing and air bubbles that occur after reaction, and if it exceeds 10 parts by weight, there is a problem with the adhesion between the polyurea resin coating waterproofing material when recoating.

In addition, the residual ratio of the isocyanate group of the isocyanate prepolymer synthesized with the polyol may be 13% to 17%. If the residual ratio is less than 13%, the overall physical properties such as tensile strength, tear strength, and film hardness may decrease when forming a film using a polyurea paint. In addition, if it exceeds 17%, the elongation decreases and the reactivity increases when forming a film using a polyurea resin waterproofing paint, so that the surface state is not smooth, which is not preferable.

The main component can be manufactured by mixing the components listed above under the appropriate conditions and allowing them to react for a certain period of time.

Additionally, the above-mentioned subject matter may further include additives such as a storage stabilizer, a thickener, etc., as needed.

Meanwhile, the curing agent is characterized by comprising 700 to 800 parts by weight of polyetheramine having a molecular weight of 2,000 to 5,000, 180 to 250 parts by weight of diethyltoluenediamine (DETDA), and 5 to 15 parts by weight of a latent curing agent.

The above polyetheramine is for increasing the elasticity of the coating film and improving mechanical strength such as elongation, and has a molecular weight of 2,000 to 5,000, and can be added in an amount of 700 to 800 parts by weight. Examples thereof include JEFFAMINE® D-2000, T-5000 from Huntsman, and CAD-2000, CAT-5000 from YANGZHOU CHENHUA NEW MATERIAL. If the amount added is less than 700 parts by weight, a decrease in elongation occurs, and if it exceeds 800 parts by weight, a problem of a decrease in tensile strength may occur.

The above diethyltoluenediamine (DETDA) is an aromatic polyamine that increases the crosslinking density and strength of the coating, and examples thereof include DETDA80 from LONZA and DETDA from ALBERMAR. The amount added is preferably 180 to 250 parts by weight, and if the amount added is less than 180 parts by weight, the content of the hard portion is low, so the strength of the coating decreases, and if it exceeds 250 parts by weight, not only does the strength increase along with the decrease in the elongation of the coating, but also the problem of hardness increasing excessively may occur.

The above latent hardener has the effect of improving the biuret reaction and increasing high-temperature durability, and uses a cyclohexanemethanamine series catalyst. The type that can be used is MD-10 or MD-100 of Luxpoly Co., Ltd. If the amount added is less than 5 parts by weight, the crosslinking density is low, which causes a decrease in heat treatment performance, and if it exceeds 15 parts by weight, the cost increases, which may cause problems in economic feasibility.

In addition, the above-mentioned hardening agent part can be applied by adding polyurea toner, dispersant, anti-foaming agent, antioxidant, and UV stabilizer as needed.

The above listed components can be mixed under the appropriate conditions below and reacted for a certain period of time to manufacture a curing agent.

Furthermore, another embodiment of the present invention is a method for waterproofing a base structure using the polyurea resin coating waterproofing composition,

The present invention provides a method for waterproofing a base structure, comprising: 1) a first step of cleaning and organizing the surface of a base structure; 2) a second step of applying, as a primer, an oil-based two-component moisture-curing polyurethane or a water-based two-component acrylic-epoxy on the surface of the base structure organized in the first step; 3) a third step of applying, as a primer conditioner, a two-component moisture-curing polyurethane, polyurethane-urea or a two-component epoxy resin on the applied primer in the second step; 4) a fourth step of applying, as a middle coat, a polyurea resin coating waterproofing composition on the base conditioner in the third step to form a coating waterproofing layer; 5) a fifth step of applying, as a top coat, an oil-based two-component acrylic-urethane or a water-based two-component acrylic-urethane on the coating waterproofing layer in the fourth step.

A schematic cross-sectional view of one of the structures of a waterproofing film formed by a method for waterproofing a base structure using a polyurea resin waterproofing film composition according to the present invention is as shown in FIG. 1.

The waterproofing construction method of a base structure using the above polyurea resin waterproofing film composition will be specifically described in each step below.

The above first step is a step of cleaning and organizing the surface of the base structure. Specifically, impurities, laitance, and deteriorated areas existing on the surface of the base structure are removed, cleaned, and the base surface can be organized. At this time, the impurities, etc. are removed using general cutting equipment such as a planer, grinder, shot blaster, and polisher, and the removed area can be cleaned using general cutting equipment such as a water jet or a high-pressure water sprinkler and cleaned with a vacuum suction device. In addition, if a crack occurs in the base structure after the above first step, a step of repairing the cracked area using a polyurethane sealant, ultra-fast putty, or epoxy putty may be further included.

The second step is a step of applying an oil-based two-component moisture-curing polyurethane or a water-based two-component acrylic-epoxy as a primer to the surface of the cleaned base structure of the first step. Specifically, it is a process for tightly applying an oil-based two-component moisture-curing polyurethane or a water-based two-component acrylic-epoxy, which acts as an adhesive, to the surface of the cleaned base structure.

The third step is a step of applying a two-component moisture-curing polyurethane, two-component polyurethane-urea, or two-component epoxy resin as a base conditioner on the base coat applied in the second step. Specifically, any one of the base conditioners listed above can be used considering the surface condition of the base structure and the state of the base coat. At this time, the base conditioner can penetrate the base structure with excellent penetrability and provide excellent adhesion.

The fourth step is a step of forming a waterproof coating layer by applying a polyurea resin coating waterproofing composition as an intermediate layer on the base conditioner of the third step. Specifically, a polyurea resin coating waterproofing composition having excellent long-term durability is applied as an intermediate layer on top of the area where the base conditioner has been applied. At this time, the application of the polyurea resin coating waterproofing composition having excellent long-term durability can be performed 1 to 3 times, and the thickness of the formed coating can be 0.8 to 3.5 mm.

At this time, the application can be constructed using spray equipment. More specifically, as a limited example of the spray equipment, a Fusion MP spray gun (equipped with a Mixing module XF 2929) can be used. At this time, the application can be constructed while maintaining the temperature at 55 to 70°C and the spray pressure at 1,500 to 3,500 psi.

If the temperature is below 65℃, the physical properties may deteriorate due to poor mixing between the subject and the hardener, and if it exceeds 70℃, the curing speed may increase and swelling problems may occur due to overheating. In addition, if the spray pressure is below 1,500 psi, poor mixing of the subject and the hardener may occur in the mixing module, and if it exceeds 3,500 psi, the spray speed may be too fast, which may cause problems with the flatness of the application surface.

The above-mentioned fifth step is a step of applying an oil-based two-component acrylic-urethane or a water-based two-component acrylic-urethane as a topcoat over the middle of the above-mentioned fourth step. Specifically, an oil-based two-component acrylic-urethane or a water-based two-component acrylic-urethane can be applied as a topcoat. The above-mentioned fifth step can be generally applied only when ultraviolet rays are irradiated, and if ultraviolet rays are not irradiated, it is unnecessary and can be omitted.

According to a method for waterproofing a base structure using a polyurea resin coating waterproofing material composition having excellent physical properties such as adhesiveness according to one embodiment of the present invention, not only is the adhesiveness to a base structure such as concrete or metal excellent, and the tensile strength ratio and performance after heat treatment which are temperature dependent, excellent, but also has the advantage of being inexpensive.

The present invention will be described in more detail by way of the following examples and comparative examples, but the present invention is not limited to these examples. Various modifications are possible by those skilled in the art within the technical scope of the present invention.

<Manufacturing Example 1> Manufacturing of the subject part

450 g of monomeric MDI (BASF Lupranate MI), 100 g of modified MDI (Kumho Mitsui Chemicals Cosmonate LL), 336 g of polyether polyol (KPX Chemical PP-2000), 10 g of glycerol ester of tall oil rosin (Dertoline 2GL), 90 g of plasticizer (GL-300), and 2 g of antifoaming agent were placed in a reaction vessel, and then uniformly stirred at 70 to 80°C for 3 to 4 hours and 100 to 500 rpm to produce an isocyanate prepolymer having an NCO content of 15.1%.

Below, as shown in [Table 1], isocyanate prepolymers were manufactured using the same method as above by changing the mixing amount of raw materials in various ways.

Subject Raw Material Mixing Amount Monomeric MDI Modified MDI PP-2000 Dertoline G2L Plasticizer
GL-3000 parcel NCO
% Manufacturing Example 1-1 450 100 356 10 90 4 14.7 Manufacturing Example 1-2 420 130 336 15 100 5 14.9 Manufacturing Example 1-3 400 90 356 10 90 4 14.5 Manufacturing Example 1-4 500 110 356 10 90 4 15.6 Manufacturing Example 1-5 450 100 290 10 90 4 16.0 Manufacturing Example 1-6 450 100 356 4 90 4 14.9 Manufacturing Example 1-7 450 100 356 31 90 4 14.0 Manufacturing Example 1-8 450 100 356 10 45 4 15.4 Manufacturing Example 1-9 450 100 356 10 105 4 14.5 Manufacturing Example 1-10 450 100 356 10 90 2 14.4 Comparative manufacturing example 1 450 100 356 10 90 4 14.7 Comparative manufacturing example 2 450 100 356 10 90 4 14.8

※ 1. Comparative manufacturing example 1 uses silane (Silane A-187) instead of rosin ester (Dertoline G2L).

use

2. Comparative manufacturing example 2 uses gum rosin (Dertoline G2L) instead of rosin ester.

Use X Grade)

<Manufacturing Example 2> Manufacturing of the hardening agent

Polyetheramine D-2000 (Huntsman product) 660g, T-5000 (Dong company product) 80g, aromatic amine diethyltoluenediamine (DETDA) 220g, and latent curing agent MD-10 (Luxpoly product) 5g were placed in a reaction vessel, stirred at a speed of 1,000 rpm and uniformly stirred slowly at room temperature for 2 hours to prepare a curing agent portion.

Below, as shown in [Table 2], the mixing amount of raw materials was changed in various ways and the hardened portion was manufactured using the same method as above.

Hardener raw material mixing amount polyetheramine
(D-2000) polyetheramine
(T-5000) DETDA Potential hardener
(MD-10) Manufacturing Example 2-1 660 80 220 5 Manufacturing Example 2-2 620 150 220 5 Manufacturing Example 2-3 600 90 220 5 Manufacturing Example 2-4 660 150 220 5 Manufacturing Example 2-5 660 80 170 5 Manufacturing Example 2-6 600 80 260 5 Manufacturing Example 2-7 660 80 220 4 Manufacturing Example 2-8 660 80 220 16 Comparative manufacturing example 3 660 80 220 -

<Examples and Comparative Examples> Formation of a Film

Using a Fusion MP spray gun (equipped with a mixing module XF 2929), a polyurea resin waterproofing coating composition in which the main part and the hardener part, each manufactured as described above, were mixed in a volume ratio of 1: 1 was coated on a 300 mm x 300 mm coating test piece with a coating thickness of 2 mm at a spray pressure of 1,500 to 3,500 psi at 55 to 70°C.

At this time, various mixing examples of the above-mentioned subject and hardener parts are as follows [Table 3].

Example of mixing the subject and hardener parts Subject section Hardener Example 1 Manufacturing Example 1-1 Manufacturing Example 2-1 Example 2 Manufacturing Example 1-2 Manufacturing Example 2-2 Example 3 Manufacturing Example 1-3 Manufacturing Example 2-3 Example 4 Manufacturing Example 1-4 Manufacturing Example 2-4 Example 5 Manufacturing Example 1-5 Manufacturing Example 2-5 Example 6 Manufacturing Example 1-6 Manufacturing Example 2-6 Example 7 Manufacturing Example 1-7 Manufacturing Example 2-7 Example 8 Manufacturing Example 1-8 Manufacturing Example 2-8 Example 9 Manufacturing Example 1-9 Manufacturing Example 2-1 Example 10 Manufacturing Example 1-10 Manufacturing Example 2-2 Comparative Example 1 Comparative manufacturing example 1 Comparative manufacturing example 3 Comparative Example 2 Comparative manufacturing example 2 Comparative manufacturing example 3

<Example of an exam>

The test methods and test results for the mechanical properties, etc. of the coating films coated with the polyurea resin waterproofing coating compositions according to Examples 1 to 10 and Comparative Example 1 are shown in [Table 4] and [Table 5], respectively.

1. Adhesion performance measurement (according to KS F 49222 5.2.12, 20~23℃, 57% humidity)

Adhesion performance by base structure unit concrete steel Non-ferrous
metal polyurethane
Waterproofing material Epoxy Polymer
Cement mortar Example 1 MPa 2.89 4.01 6.95 1.93 2.03 2.05 Example 2 3.29 4.83 7.27 2.09 2.81 2.24 Example 3 2.04 3.56 5.02 1.77 2.35 1.99 Example 4 2.31 3.89 6.65 1.88 2.01 1.98 Example 5 2.75 3.95 6.9 1.91 2.01 2.03 Example 6 2.25 3.45 6.45 1.65 1.99 1.95 Example 7 2.01 3.35 6.15 1.78 1.95 1.85 Example 8 2.75 3.91 6.85 1.85 1.96 2.01 Example 9 2.38 3.56 6.56 1.91 1.99 1.96 Example 10 2.42 3.67 6.64 1.93 2.01 1.99 Comparative Example 1 1.75 2.65 3.54 1.01 2.67 1.57 Comparative Example 2 1.98 3.03 4.98 1.54 2.34 1.76

2. KS F 4922 Key Performance Measurements

Thermal treatment performance seal
robbery
(N/㎟) Fever
robbery
(N/mm) Elongation rate (%) Temperature dependence Heat treatment (140℃) -20℃ 60℃ seal
Intensity ratio (%) Elongation rate (%) Tensile steel
Dobby (%) height
Rate (%) Tensile steel
Dobby (%) height
Rate (%) Example 1 19.5 81 385 158 160 70 210 86 450 Example 2 21.5 84 406 169 175 79 231 89 501 Example 3 18.6 75 401 156 159 65 209 79 385 Example 4 21.4 85 340 149 145 68 222 82 350 Example 5 22.1 87 290 140 143 69 215 81 300 Example 6 20.3 80 402 160 170 78 225 79 430 Example 7 18.2 73 352 147 162 63 198 78 380 Example 8 21.5 86 320 145 140 69 215 81 350 Example 9 19.1 76 400 159 170 68 180 78 410 Example 10 18.7 72 405 165 172 69 200 76 415 Comparative Example 1 18.5 75 351 153 115 68 205 78 348 Comparative Example 2 18.9 78 369 155 138 70 210 80 381

<Test Results Analysis>

As shown in Tables 4 and 5 above, the coating film coated with the polyurea resin waterproofing coating composition according to the present invention was able to obtain the following conclusions.

First, in terms of the adhesion performance by base structure, in the case of Examples 1 and 2, which are preferred embodiments of the present invention, the adhesion strength was maintained most excellently compared to Examples 3 to 10 and Comparative Examples 1 and 2. In addition, when looking at each base structure, it can be seen that the adhesion strength is most excellent for iron or non-ferrous metals compared to concrete, etc.

Second, in terms of performance after heat treatment, in the case of Examples 1 and 2, which are preferred examples of the present invention, the temperature dependency and heat treatment performance were maintained most excellently compared to Examples 3 to 10 and Comparative Examples 1 and 2. In particular, in the heat treatment step, the temperature dependency of Examples 1 and 2 was much better than that of Examples 3 to 10 and Comparative Examples 1 and 2.

Third, the present invention has an economic effect as it can reduce the cost by 10 to 20% compared to polyurea resin products currently sold and used on the market.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art will appreciate that various modifications and variations may be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

01: Base structure 02: Substructure
03: Base adjustment material 04: Middle
05 : Sangdo

Claims (7)

A polyurea resin waterproofing coating composition comprising a main body and a hardener body,
The above-mentioned main component comprises 500 to 600 parts by weight of isocyanate, 400 to 500 parts by weight of polyether polyol having a molecular weight of 2,000 to 5,000, 50 to 100 parts by weight of plasticizer, 5 to 30 parts by weight of glycerol ester of tall oil rosin, which is a natural emulsifier, and 3 to 10 parts by weight of antifoaming agent, and is composed of an isocyanate prepolymer having an isocyanate residual ratio of 13 to 17%.
A polyurea resin coating waterproofing material composition characterized in that the above-mentioned hardener part comprises 700 to 800 parts by weight of polyetheramine having a molecular weight of 2,000 to 5,000, 180 to 250 parts by weight of diethyltoluenediamine (DETDA), and 5 to 15 parts by weight of a cyclohexanemethanamine series catalyst which is a latent hardener.
In paragraph 1,
A polyurea resin coating waterproofing composition characterized in that the above-mentioned main body and hardener part are contained in a volume ratio of 1:1.0 to 1.1.
In paragraph 1,
A polyurea resin coating waterproofing composition characterized in that the isocyanate among the above-mentioned main components is at least two kinds selected from monomeric MDI, modified MDI, and polymeric MDI.
delete A method for waterproofing a base structure using a polyurea resin waterproofing coating composition according to any one of claims 1 to 3,
1) Step 1: Clean and organize the surface of the base structure;
2) A second step of applying a two-component, oil-based moisture-curing polyurethane or a two-component, water-based acrylic-epoxy as a primer to the surface of the base structure prepared in the first step;
3) A third step of applying a two-component moisture-curing polyurethane, two-component polyurethane-urea, or two-component epoxy resin as a base conditioner on the base coat applied in the second step;
4) A fourth step of forming a waterproof coating layer by spraying a polyurea resin waterproof coating composition on top of the base coating material of the third step as an intermediate layer at a pressure of 1,500 to 3,500 Psi and a temperature of 55 to 70°C;
5) A waterproofing construction method for a base structure, characterized by including a fifth step of applying an oil-based two-component acrylic-urethane or a water-based two-component acrylic-urethane as a topcoat on the waterproofing layer of the fourth step.
A method for waterproofing a base structure using a polyurea resin waterproofing coating composition according to any one of claims 1 to 3,
1) Step 1: Clean and organize the surface of the base structure;
2) A second step of applying a two-component, oil-based moisture-curing polyurethane or a two-component, water-based acrylic-epoxy as a primer to the surface of the base structure prepared in the first step;
3) A third step of applying a two-component moisture-curing polyurethane, two-component polyurethane-urea, or two-component epoxy resin as a base conditioner on the base coat applied in the second step;
4) A waterproofing construction method for a base structure, characterized by including a fourth step of forming a waterproof coating layer by spraying a polyurea resin waterproof coating composition as an intermediate layer on the base conditioner of the third step at a pressure of 1,500 to 3,500 Psi and a temperature of 55 to 70°C.
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