KR102761230B1 - Polyurea waterproofing composition with excellent durability - Google Patents

Abstract

The present invention relates to a polyurea waterproofing material comprising a first agent and a second agent and a method for producing the same, wherein the first agent comprises an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant, and the second agent comprises a polyol, an amine derivative, a curing accelerator, and a surface-modified basalt, and a method for producing the same.
The above polyurea waterproofing material is a two-component polyurea coating waterproofing material, and contains surface-modified basalt, so that it has excellent adhesion, tensile performance and elongation, and has a fast curing speed during work, thereby improving work efficiency. In addition, it has the advantage of providing a polyurea waterproofing material having excellent watertightness, waterproofness and wear resistance from the properties of basalt, and a method for manufacturing the same.

Description

Polyurea waterproofing composition with excellent durability and its manufacturing method {Polyurea waterproofing composition with excellent durability}

The present invention relates to a polyurea waterproofing material. More specifically, the present invention relates to a two-component polyurea coating waterproofing material containing surface-modified basalt, which has excellent adhesion, tensile performance and elongation, and excellent durability such as watertightness and wear resistance, and a method for manufacturing the same.

Generally, waterproofing construction is carried out on the surface of various building structures such as roofs, floors, underground parking lots, and window frames of 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 carried out on the surface using waterproofing membranes, asphalt, sheets, etc. Recently, composite waterproofing construction that mixes these has also been carried out.

Among them, the waterproof coating construction method is a method of coating a two-component paint of polyurethane, polyurea or epoxy series, and has the advantages of having few cracks and being easy to construct regardless of the structure or shape of the surface to be coated. The polyurea is a polymer material with elastomeric properties, and has the advantage of being able to quickly harden after being sprayed on the surface to be coated due to the rapid reactivity of the isocyanate and amine compounds that make up the main agent and the hardener, thereby forming a strong and thick waterproof coating film. Furthermore, unlike polyurethane or epoxy series paints, it is widely known as an environmentally friendly material that does not contain volatile organic compounds (VOCs) and environmental hormones and does not use organic solvents that are harmful to the human body, and thus has no unpleasant odor.

Meanwhile, the chemical structure of polyurea resin contains polyurethane-urea bonds, so it has superior tensile strength and elongation compared to other paints. However, after construction, it has a problem that durability is reduced by external factors such as ultraviolet rays and air pollutants, making it difficult to maintain physical properties, and it has a disadvantage that it is difficult to control the curing time and drying time at high or low temperatures, so a solution to solve this is necessary. Therefore, research on polyurea coating materials that can maintain their role as waterproofing materials for a long time by improving physical properties and enhancing durability is necessary.

Meanwhile, basalt fiber is an inorganic fiber made by melting basalt generated as a result of volcanic activity at over 1,500℃ and then making it into a fine thread, and it is emerging as an alternative to glass fiber due to the classification of glass fiber as a carcinogen. Basalt fiber is non-toxic and free from pulmonary fibrosis and carcinogens, so it is not harmful to the human body, and since it is manufactured by spinning using centrifugal force, it can be produced inexpensively using relatively low energy. In particular, it is known to have the advantages of high temperature resistance, high strength, and high wear resistance, and research is being conducted as a reinforcing material or reinforcing material in various industrial fields.

Japanese Special Publication No. 10-292149 (1998.11.04.)

In order to solve the above problems, the present invention provides a polyurea waterproofing material containing basalt and a method for manufacturing the same. The polyurea waterproofing material is a two-component polyurea coating waterproofing material containing surface-modified basalt, and has excellent adhesive strength, tensile performance and elongation, and has a fast curing speed during work, thereby improving work efficiency.

In addition, the purpose is to provide a polyurea waterproofing material having excellent watertightness, waterproofness and wear resistance from the characteristics of basalt and a method for manufacturing the same.

However, the above purpose is exemplary, and the technical idea of the present invention is not limited thereto.

One aspect of the present invention for achieving the above object relates to a polyurea waterproofing material comprising a first agent and a second agent, wherein the first agent comprises an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant, and the second agent comprises a polyol, an amine derivative, a curing accelerator, and a surface-modified basalt, and a method for producing the same.

In the above aspect, the surface-modified basalt may be surface-modified with a dipodal silane compound satisfying the following chemical formula 1.

[Chemical Formula 1]

(Above R ₁ is selected from an alkoxy group having 1 to 2 carbon atoms, and above R ₂ is selected from an alkylene group having 1 to 4 carbon atoms)

In the above aspect, the basalt may have an average particle diameter of 9 to 18 ㎛ and an average diameter-to-length ratio of 1:4 to 8.

In the above aspect, the surface-modified basalt may be included in an amount of 10 to 20 parts by weight relative to 100 parts by weight of the polyol.

In the above aspect, the isocyanate group-containing polyurethane prepolymer may be prepared from a polymerization reaction of a polyol-based compound and an isocyanate derivative compound.

In the above aspect, the polyol may be at least one selected from polyether polyol, polyoxyethylpropyl glycol, polyoxytetraethylene glycol, and polyoxyethylene glycol.

In the above aspect, the isocyanate derivative compound may be at least one selected from hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMHDI), lysine diisocyanate (LDI), isophorone diisocyanate (IPDI), 1,4-cyclohexane diisocyanate (CHDI), 4,4'-dicyclohexylmethane diisocyanate (HMDI), toluene diisocyanate (TDI), and 4,4'-diphenylmethane diisocyanate (MDI).

In the above aspect, the amine derivative may be at least one selected from ethylenediamine, triethylenetetramine, piperidine, hexamethylenediamine, diethylenetetramine, polyethyleneimine, and diethyltoluenediamine.

In the above aspect, the curing accelerator may be at least one selected from dimethylthiotoluenediamine (DMTDA) and diethylthiotoluenediamine (DETDA).

In the above aspect, the first agent and the second agent may be mixed in a weight ratio of 1:0.8 to 1.2.

In addition, another aspect of the present invention relates to a method for manufacturing a polyurea waterproofing agent, including the step of spraying and curing a polyurea waterproofing agent composition comprising a first agent and a second agent.

The durable polyurea waterproofing material according to the present invention is a two-component polyurea coating waterproofing material, which contains surface-modified basalt, and thus has excellent adhesion, tensile performance, and elongation, and a fast curing speed, thereby improving work efficiency.

In addition, there is an advantage in that it can provide a polyurea waterproofing material and a method for manufacturing the same with excellent watertightness, waterproofness, and wear resistance from the characteristics of basalt.

Figure 1 is a schematic diagram showing the surface of a surface-modified basalt according to an example of the present invention.

Hereinafter, a polyurea waterproofing material with excellent durability and a method for manufacturing the same according to the present invention will be described in detail. The drawings introduced below are provided as examples so that those skilled in the art can sufficiently convey the idea of the present invention. Therefore, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be illustrated in an exaggerated manner to clarify the idea of the present invention. At this time, if there is no other definition in the technical and scientific terms used, they have the meaning commonly understood by those skilled in the art to which this invention belongs, and in the following description and the attached drawings, a description of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

The present invention relates to a polyurea waterproofing material comprising a first agent and a second agent, wherein the first agent comprises an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant, and the second agent comprises a polyol, an amine derivative, a curing accelerator, and a surface-modified basalt, and a method for producing the same.

The polyurea waterproofing material with excellent durability according to the present invention is a two-component polyurea coating waterproofing material, which contains surface-modified basalt and thus has excellent effects in adhesion, tensile performance and elongation, and has the advantage of being able to provide a polyurea waterproofing material with excellent watertightness, waterproofness and wear resistance due to the properties of basalt.

Hereinafter, each component of a durable polyurea waterproofing material according to an example of the present invention will be described in more detail.

In one aspect of the present invention, the first agent may include an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant.

The above isocyanate group-containing polyurethane prepolymer may be prepared from a polymerization reaction of a polyol-based compound and an isocyanate derivative compound, and specifically may be prepared by polymerizing 50 to 80 parts by weight of an isocyanate derivative compound to 100 parts by weight of a polyol-based compound. The polyol-based compound may be at least one selected from polyether polyol, polyoxyethylpropyl glycol, polyoxytetraethylene glycol, and polyoxyethylene glycol, and more preferably, a polyether polyol having a weight average molecular weight of 300 to 4,000 g/mol may be used. The above isocyanate derivative compound may be at least one selected from hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMHDI), lysine diisocyanate (LDI), isophorone diisocyanate (IPDI), 1,4-cyclohexane diisocyanate (CHDI), 4,4'-dicyclohexylmethane diisocyanate (HMDI), toluene diisocyanate (TDI), and 4,4'-diphenylmethane diisocyanate (MDI), and specifically, 4,4'-diphenylmethane diisocyanate (MDI) can be used.

The terminal isocyanate functional group of the polyurethane prepolymer (hereinafter, “prepolymer”) containing the isocyanate group manufactured above determines the basic physical properties such as tensile strength, hardness, and elongation when the polyurea is used as a coating material. If the content of the terminal isocyanate functional group is high, the hardness and tensile strength are high and the reaction speed is fast, but the viscosity is high and workability is low. Therefore, in order to provide appropriate physical properties through chemical bonding with the amine derivative of the second agent described later, it is preferable to maintain the content of the terminal isocyanate group of the prepolymer at 15 to 20 mass%. If it is less than 15 mass%, the hardness after curing of the coating film decreases, making it difficult to obtain the effect of improving the desired physical properties, and if it exceeds 20 mass%, the hardness of the coating film increases, causing a problem in that the elongation decreases or the smoothness of the appearance decreases.

The above isocyanate derivative compound may be the same isocyanate derivative compound as described above in the above prepolymer, and 4,4'-diphenylmethane diisocyanate (MDI) is more preferable because it has low reactivity with atmospheric moisture even in a high humidity environment and can be used without concern for deterioration of the physical properties of the coating film. The amount added may be 30 to 60 parts by weight based on 100 parts by weight of the above prepolymer, and the waterproofing property of the coating film waterproofing material can be excellently expressed within the above range.

The above polyvinyl alcohol acts as a stabilizer and can be used having a weight average molecular weight of 400 to 2,000 g/mol, and can be used in an amount of 15 to 45 parts by weight based on 100 parts by weight of the above prepolymer. If the amount of the polyvinyl alcohol is less than 15 parts by weight or more than 45 parts by weight, the flame retardancy and other effects are reduced, which is not preferable.

The above first agent may contain a phosphorus flame retardant. The phosphorus flame retardant may be at least one selected from triphenyl phosphate, tricresyl phosphate, tert-butylphenyl diphenyl phosphate, tetraphenyl m-phenylene diphosphate, and tris(2,4-dibromophenyl) phosphate. Specifically, triphenyl phosphate can be used, and if it is added excessively, the flame retardancy may be improved, but workability may be reduced and cracks may occur in the coating film. Therefore, considering workability and flame retardancy, it is preferable to include it in an amount of 10 to 15 parts by weight based on 100 parts by weight of the prepolymer.

Next, the above two items will be explained.

In one embodiment of the present invention, the second agent is characterized by including a polyol, an amine derivative, a curing accelerator, and a surface-modified basalt, wherein the polyol is for providing a sufficient curing speed to the polyurea coating film, and, like the polyol-based compound which is a component of the isocyanate group-containing polyurethane prepolymer described above in the first agent, at least one polyol selected from polyether polyol, polyoxyethylpropyl glycol, polyoxytetraethylene glycol, and polyoxyethylene glycol can be used. Specifically, a polyether polyol having a weight average molecular weight of 300 to 4,000 g/mol can be used.

The above amine derivative can form a polyurea bond through a reaction with a terminal isocyanate group of the prepolymer of the first agent, and may be at least one selected from ethylenediamine, triethylenetetramine, piperidine, hexamethylenediamine, diethylenetetramine, polyethyleneimine, and diethyltoluenediamine. Specifically, ethylenediamine can be used, and it is preferable to contain the amine derivative in an amount of 30 to 100 parts by weight based on 100 parts by weight of the polyol of the second agent. If it is less than 30 parts by weight, the urea bond is small, so that the tensile strength may be lower than the standard or the waterproofness may be weakened. If it exceeds 100 parts by weight, there is a problem that the elongation at low temperature decreases due to an increase in the tensile strength at room temperature.

The above-mentioned curing accelerator may be at least one selected from an aromatic polyamine, dimethylthiotoluenediamine (DMTDA) and diethylthiotoluenediamine (DETDA). More specifically, dimethylthiotoluenediamine (DMTDA) can be used. The DMTDA is a secondary amine, and the reactivity of the active amine group (NH2) is increased by the alkyl group, thereby promoting a chain reaction. It is a liquid with a lower viscosity than MOCA (Methylene bis Ortho-Chloro Aniline), which is generally used at room temperature, and can be applied even at low temperatures. Compared to MOCA, which has been notified as a toxic substance by the Ministry of Environment, DMTDA is an environmentally friendly, low-toxicity liquid chain extender, and has the advantage of being able to provide an appropriate crosslinking density of the coating film, having excellent adhesion, spreadability, and leveling, enabling the formation of a flat coating film, and providing fast-curing of a polyurea coating film. The effect can be sufficiently expressed when the content of the above-mentioned curing accelerator is included in a range of 10 to 20 parts by weight based on 100 parts by weight of the above-mentioned polyol.

The above-mentioned second agent is characterized by including surface-modified basalt. Generally, basalt fibers are made into fibers by melting and spinning basalt, and have ductility, so they have the property of absorbing shock and maintaining the rigidity of a structure compared to general carbon fibers. Basalt is a powder obtained by pulverizing the above-mentioned basalt fibers by ball milling or wind milling, and can be applied as a reinforcing material to various materials such as anti-corrosion coatings, resins, and reinforced nylon. Basalt is an environmentally friendly material with high wear resistance and high temperature resistance and low toxicity, and can be used as a reinforcing material that can improve the wear resistance, mechanical strength, and watertightness of the final coating waterproofing material in the present invention. The above-mentioned basalt is characterized by having an average particle diameter of 9 to 18 ㎛ and an average diameter-length ratio of 1:4 to 8. In the above range, the length of the basalt may be 30 to 50 ㎛, and the basalt may be surface modified to improve compatibility with other compositions of the polyurea waterproofing agent, thereby maximizing the watertightness, waterproofness, and wear resistance of the coating film.

The above surface-modified basalt is characterized in that the surface of the basalt is surface-modified with a dipodal silane compound satisfying the following chemical formula 1.

[Chemical Formula 1]

(Above R ₁ is selected from an alkoxy group having 1 to 2 carbon atoms, and above R ₂ is selected from an alkylene group having 1 to 4 carbon atoms)

The dipodal silane compound satisfying the above chemical formula 1 may be specifically one selected from bis(trimethoxysilylpropyl)amine and bis(triethoxysilylpropyl)amine.

The above-mentioned dipodal silane compound contains an amine group, and thus can provide an amine group to the surface of the basalt and modify it to be organophilic, as shown in FIG. 1. Specifically, the silane present at the anode of the dipodal silane compound is bonded to the surface of the basalt, and the amine group is exposed to the outside to induce bonding with the surface reactive group of another component. In this way, the basalt exhibits organophilicity due to the amine group introduced in large quantities to the surface, and not only can the compatibility of the basalt within the second agent be improved, but also more uniform and higher compatibility can be exhibited when mixed with the first agent through a chemical bond with the isocyanate group present at the terminal of the prepolymer of the first agent. In addition, the amine group is a secondary amine and has high reactivity due to an alkyl group, and thus has the effect of improving work efficiency.

Compared to general silane coupling agents, the dipodal silane compound can be more firmly bonded to the surface of basalt as shown in Fig. 1 due to the silane present in the anode, and the polyurea bonding strength is improved, and the durability is improved, so that the watertightness and waterproofness can be maintained excellently. In addition, there is an advantage in that the wear resistance can be provided from the characteristics of basalt, and the property improvement effect of the final polyurea waterproofing material can be uniformly exhibited throughout the coating film due to the increased compatibility. Considering the reaction efficiency with the amine group and isocyanate group of the surface of basalt, the dipodal silane compound is preferably included in an amount of 1 to 5 parts by weight based on 100 parts by weight of basalt.

The above surface-modified basalt may be included in the above 2nd agent in an amount of 10 to 20 parts by weight relative to 100 parts by weight of polyol. If included in an amount less than 10 parts by weight, no significant effect can be expected due to the addition, and if included in an amount exceeding 20 parts by weight, residual crazing, cracking, and lifting may occur after the formation of the coating film, which is not good.

The above second agent may additionally include a catalyst, and at least one of tin-based, bismuth-based, lead-based, cobalt-based, and tertiary amine-based catalysts may be used alone or in combination. Specifically, a tin-based catalyst may be used, and dibutyl tin dilaurylate (DBTDL) may be used. The amount added is preferably 1 to 5 parts by weight based on 100 parts by weight of the polyol of the second agent. If it is less than 1 part by weight, not only will the touch drying time fall short of the standard, but a flowing phenomenon may occur in vertical sections, and if it exceeds 5 parts by weight, the curing time will be too fast, which is not good because there is a problem of a decrease in smoothness or an excessive increase in strength.

In addition, the first and second agents may independently further include one or more additives selected from the group consisting of fillers, antioxidants, ultraviolet stabilizers, colored pigments, moisture absorbers, and antifoaming agents as needed, and the specific type and content may be selected within a typical range.

The above first and second agents are mixed in a weight ratio of 1:0.8 to 1.2, so that mixing is easy and sufficient reaction can be achieved without unreacted residual components, thereby maximizing the effects of the present invention.

Another aspect of the present invention relates to a method for producing a polyurea waterproofing material, characterized in that the method comprises mixing a first agent comprising a polyurethane prepolymer containing a different isocyanate group, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant, with a second agent comprising a polyol, an amine derivative, a curing accelerator, and a surface-modified basalt. The specific types and contents of the components of the first and second agents are the same as those described above, and therefore, a duplicate description is omitted.

The method of mixing, spraying, and curing the above combination of agent 1 and agent 2 can be performed by a method commonly used in the art.

Hereinafter, the polyurea waterproofing material with excellent durability and the method for manufacturing the same according to the present invention will be described in more detail through examples. However, the following examples are only a reference for explaining the present invention in detail, and the present invention is not limited thereto, and can be implemented in various forms.

Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is only for the purpose of effectively describing specific embodiments and is not intended to limit the invention. Also, the unit of additives not specifically described in the specification may be weight percent.

1) Manufacturing of surface-modified basalt

A silane ethanol solution was prepared by dissolving 4 g of bis(trimethoxylpropyl)amine (95%) in 1,000 g of ethanol, and 100 g of basalt powder (HBGMEC) was mixed. The mixture was sonicated at room temperature for 1 hour, and the basalt was filtered, washed with ethanol, and dried at 80°C for 24 hours to prepare a surface-modified basalt.

2) Manufacturing of polyurethane prepolymer containing isocyanate group

120 g of 4,4'-diphenylmethane diisocyanate was mixed with 200 g of polyether polyol (weight average molecular weight 2,000 g/mol) and polymerized at 90°C for 6 hours to produce an isocyanate group-containing polyurethane prepolymer (hereinafter, “prepolymer”) having an isocyanate group content of 18%.

3) 1st manufacturing

200 g of the above prepolymer, 100 g of 4,4'-diphenylmethane diisocyanate, 60 g of polyvinyl alcohol (weight average molecular weight 1,000 g/mol), and 20 g of triphenyl phosphate were mixed, stirred at 70 to 80°C for 3 hours, and cooled to 40°C or lower to prepare Agent 1.

4) Secondary manufacturing

200 g of polyether polyol (weight average molecular weight 2,000 g/mol), 80 g of ethylenediamine, 20 g of DMTDA, 20 g of the surface-modified basalt, 20 g of DMTDA, 4 g of catalyst (dibutyl tin dilaurylate (DBTDL)), 10 g of pigment (PIGMENT RED 254), 15 g of antifoaming agent (silicone resin), and 3 g of moisture absorbent (trimethylolformate (TEOF, Hule)) were mixed and stirred at high speed for 3 hours to prepare Part 2.

[Manufacturing examples 1 to 4 and comparative manufacturing examples 1 to 2]

Except that the content of the surface-modified basalt of the above-mentioned second agent was adjusted as shown in Table 1 below, the second agent was manufactured through the same process, and the first agent was sprayed through different nozzles at a weight ratio of 1:1, and cured to manufacture waterproofing material specimens of Manufacturing Examples 1 to 4 and Comparative Manufacturing Examples 1 to 2 having a thickness of 2 to 3 mm.

Content (weight parts) Manufacturing example 1 Manufacturing example 2 Manufacturing example 3 Manufacturing example 4 Comparative manufacturing example 1 Comparative manufacturing example 2 2
my Polyether polyol 100 100 100 100 100 100 Ethylenediamine 40 40 40 40 40 40 Surface modified
Basalt 8 10 20 25 20
(Unmodified Basalt) - DMTDA 10 10 10 10 10 10 etc 16 16 16 16 16 16

[Characteristic evaluation method]

For the polyurea coating waterproofing material specimens of the above Manufacturing Examples 1 to 3 and Comparative Manufacturing Examples 1 to 2, the tensile performance, temperature-dependent performance, and tensile performance after thermal treatment were tested in accordance with the test specifications of KS F 4922, and the abrasion resistance was tested in accordance with the test specifications of KS F 0818, and the results are shown in Table 2 below.

The deterioration properties upon elongation of the polyurea coating waterproofing material specimens of the above-mentioned manufacturing examples 2 to 4 were evaluated according to the KS F 4922 test standard, and are shown in Table 3 below.

Evaluation items (unit) Manufacturing example 1 Manufacturing example 2 Manufacturing example 3 Comparative manufacturing example 1 Comparative manufacturing example 2 seal
Performance Tensile strength (MPa) 17.8 22 23 16.1 14.5 Elongation rate (%) 310 400 402 275 226
Temperature dependent performance 60℃ Tensile strength ratio (%) 63 70 69 60 48 Elongation rate (%) 168 171 172 164 148 20℃ Elongation rate (%) 152 157 60 150 121 -20℃ Tensile strength ratio (%) 176 220 224 162 129 Elongation rate (%) 116 120 125 112 96 After heat treatment
Tensile performance Heat treatment seal
Intensity ratio (%) 88 92 92 87 69 Elongation rate (%) 274 300 301 272 199 After stimulation (%) seal
Intensity ratio (%) 86 90 89 70 60 Elongation rate (%) 275 319 317 271 191 Wear resistance (mg) 99 80 82 103 210

Evaluation items Manufacturing example 2 Manufacturing example 3 Manufacturing example 4 The deterioration of kidney function
(There shall be no cracks or obvious deformation on any test piece) Heat treatment No problem No problem Crack in the film Accelerated exposure treatment No problem No problem Crack in the film Ozone treatment No problem No problem Crack in the film

Referring to Table 2 above, Comparative Manufacturing Example 1 was prepared by adding unmodified pure basalt instead of surface-modified basalt, and compared to Comparative Manufacturing Example 2 in which no basalt was added at all, it showed wear resistance performance of 103 mg, and it was confirmed that the properties of the coating film increased due to the addition of basalt, but the effect was not significant or did not meet the test standards of KS F 4922.

The above Manufacturing Examples 1 to 4 contain surface-modified basalt. In the case of Manufacturing Example 1, 8 parts by weight of the surface-modified basalt was contained relative to 100 parts by weight of the polyol of the second agent, and it can be seen that the tensile performance, temperature-dependent performance, tensile performance after thermal treatment, and wear resistance all increased in numerical values compared to Comparative Manufacturing Example 1. In particular, the Manufacturing Examples 2 and 3 contain 10 to 20 parts by weight of the surface-modified basalt relative to 100 parts by weight of the polyol, and it can be confirmed that they are waterproofing coatings that not only exceed the test standards of KS F 4922, but also have excellent properties not only in high or low temperature environments but also after thermal treatment. In addition, as shown in Table 3, when the deterioration phenomenon of the waterproofing film during elongation was tested, Manufacturing Examples 2 and 3 maintained a state without lifting or cracking, but in Manufacturing Example 4, the content of surface-modified basalt exceeded 20 parts by weight, and cracking of the waterproofing film was confirmed.

Although the present invention has been described through specific matters and limited examples as above, these have been provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those skilled in the art to which the present invention pertains can make various modifications and variations from this description.

Therefore, the idea of the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims described below as well as the claims are included in the scope of the idea of the present invention.

Claims (17)

In a polyurea waterproofing agent containing first and second agents,
The above first agent comprises an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant.
The above two agents include a polyol, an amine derivative, a curing accelerator and a surface-modified basalt,
The above surface-modified basalt is surface-modified with a dipodal silane compound satisfying the following chemical formula 1:
The above first agent comprises 30 to 60 parts by weight of an isocyanate derivative compound, 15 to 45 parts by weight of polyvinyl alcohol, and 10 to 15 parts by weight of a phosphorus flame retardant, relative to 100 parts by weight of an isocyanate group-containing polyurethane prepolymer.
A polyurea waterproofing material characterized in that the above two agents comprise 30 to 100 parts by weight of an amine derivative, 10 to 20 parts by weight of a curing accelerator, and 10 to 20 parts by weight of a surface-modified basalt per 100 parts by weight of polyol.
[Chemical Formula 1]

(Above R ₁ is selected from an alkoxy group having 1 to 2 carbon atoms, and above R ₂ is selected from an alkylene group having 1 to 4 carbon atoms) delete In paragraph 1,
The above-mentioned basalt is a polyurea waterproofing material characterized by having an average particle diameter of 9 to 18 ㎛ and an average diameter-length ratio of 1:4 to 8. delete In paragraph 1,
A polyurea waterproofing material characterized in that the above isocyanate group-containing polyurethane prepolymer is produced from a polymerization reaction of a polyol compound and an isocyanate derivative compound. In paragraph 1,
A polyurea waterproofing material, characterized in that the polyol is at least one selected from polyether polyol, polyoxyethylpropyl glycol, polyoxytetraethylene glycol, and polyoxyethylene glycol. In paragraph 1,
A polyurea waterproofing material, characterized in that the isocyanate derivative compound is at least one selected from hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMHDI), lysine diisocyanate (LDI), isophorone diisocyanate (IPDI), 1,4-cyclohexane diisocyanate (CHDI), 4,4'-dicyclohexylmethane diisocyanate (HMDI), toluene diisocyanate (TDI), and 4,4'-diphenylmethane diisocyanate (MDI). In paragraph 1,
A polyurea waterproofing material, characterized in that the above amine derivative is at least one selected from ethylenediamine, triethylenetetramine, piperidinium, hexamethylenediamine, diethylenetetramine, polyethyleneimine, and diethyltoluenediamine. In paragraph 1,
A polyurea waterproofing material, characterized in that the above-mentioned curing accelerator is at least one selected from dimethylthiotoluenediamine (DMTDA) and diethylthiotoluenediamine (DETDA). In paragraph 1,
A polyurea waterproofing material characterized in that the first and second agents are mixed in a weight ratio of 1:0.8 to 1.2. A first agent comprising an isocyanate group-containing polyurethane prepolymer, an isocyanate derivative compound, polyvinyl alcohol, and a phosphorus flame retardant;
Mixing with two agents including polyol, amine derivative, curing accelerator and surface-modified basalt,
The above surface-modified basalt is surface-modified with a dipodal silane compound satisfying the following chemical formula 1:
The above first agent comprises 30 to 60 parts by weight of an isocyanate derivative compound, 15 to 45 parts by weight of polyvinyl alcohol, and 10 to 15 parts by weight of a phosphorus flame retardant, relative to 100 parts by weight of an isocyanate group-containing polyurethane prepolymer.
A method for producing a polyurea waterproofing material, characterized in that the above two agents are produced by including 30 to 100 parts by weight of an amine derivative, 10 to 20 parts by weight of a curing accelerator, and 10 to 20 parts by weight of a surface-modified basalt per 100 parts by weight of polyol.
[Chemical Formula 1]

(Above R ₁ is selected from an alkoxy group having 1 to 2 carbon atoms, and above R ₂ is selected from an alkylene group having 1 to 4 carbon atoms) delete In Article 11,
A method for manufacturing a polyurea waterproofing material, characterized in that the above basalt particles have an average diameter of 9 to 18 ㎛ and an average diameter-length ratio of 1:4 to 8. delete In Article 11,
A method for producing a polyurea waterproofing material, characterized in that the above isocyanate group-containing polyurethane prepolymer is produced through a polymerization reaction of a polyol compound and an isocyanate derivative compound. In Article 11,
A method for manufacturing a polyurea waterproofing material, characterized in that the first and second agents are mixed in a weight ratio of 1:0.8 to 1.2. A method for constructing a polyurea waterproofing material, comprising spraying and curing a polyurea waterproofing material according to any one of claims 1, 3, 5 to 10.