KR102379019B1 - Composition for forming polyurea waterproof painting layer and waterproof, anticorrosive, salt tolerant and anti-pollution polyurea painting method using the same - Google Patents

Abstract

One embodiment of the present invention provides a composition for forming a polyurea waterproof painting film comprising a first component containing isocyanate and a second component containing diamine, and a waterproof, anticorrosive, salt tolerant, and anti-pollution polyurea waterproofing painting method using the same.

Description

A composition for forming a polyurea waterproof coating film and a waterproof, corrosion-resistant, flame-resistant and stain-resistant polyurea coating method using the same

The present invention relates to a composition for forming a polyurea waterproof coating film and a polyurea waterproof coating method using the same, in particular, for forming a polyurea waterproof coating film capable of preventing moisture penetration through the surface of concrete and protecting concrete structures It relates to a composition and a waterproof, anticorrosive, flame-resistant and stain-resistant polyurea coating method using the same.

Concrete is a strong structure used in various facilities and buildings. To maintain the durability of concrete, prevent corrosion, or prevent moisture ingress, the surface of concrete is treated with waterproofing. In particular, when concrete is used for storing water (H ₂ O) or blocking water, waterproofing treatment for concrete is required.

For concrete waterproofing, a waterproofing coating film is generally formed on the concrete surface. In order to form a waterproof coating film on a concrete surface, an epoxy-based or polyurethane-based waterproofing material is generally used. Recently, various types of waterproofing materials have been studied to improve waterproofing efficiency and waterproofing work efficiency, and to form an excellent and stable waterproofing film.

One embodiment of the present invention is to provide a composition for forming a waterproof polyurea coating film having a fast curing rate and capable of forming a waterproof polyurea coating film having excellent waterproof properties.

Another embodiment of the present invention is to provide a waterproof coating film formed by a composition for forming a polyurea waterproof coating film.

Another embodiment of the present invention is to provide a polyurea waterproof coating method using a composition for forming a polyurea waterproof coating film.

In order to solve the above problems, an embodiment of the present invention includes a first component including an isocyanate compound and a second component including a diamine compound. The first component, based on the total weight of the first component, 85 to 98% by weight of a prepolymer having a urethane group and an isocyanate group, 0.2 to 10% by weight of a trishaloalkyl-based phosphate, and a dibenzoate-based plasticizer 1 to 10% by weight. The second component, based on the total weight of the second component, 60 to 70% by weight of diaminopolypropylene glycol, 10 to 20% by weight of diethylmethylbenzenediamine, 10 to 20% by weight of polypropylene oxide-based triamine, triethanol 1 to 10% by weight of an amine, a mixed powder of milled carbon fiber powder and magnesium silicate mineral powder, and 1 to 10% by weight of a colorant. The mixed powder of the carbon fiber powder and the magnesium silicate mineral includes 1 to 10% by weight of the carbon fiber powder and 0.3 to 3% by weight of the magnesium silicate mineral powder, based on the total weight of the second component.

The first component and the second component may have a volume ratio of 1:0.9 to 1:1.1.

The prepolymer is formed by a mixture of a diisocyanate compound and a polyol, wherein the polyol and the diisocyanate compound may be mixed in a weight ratio of 1:1 to 1.5.

The diisocyanate compound may include methylenebisphenyl isocyanate.

The polyol may include polypropylene glycol and trihydric alcohol.

The polypropylene glycol and the trihydric alcohol may be mixed in a weight ratio of 95 to 99:1 to 5.

The polypropylene oxide-based triamine may be represented by the following Chemical Formula 14.

[Formula 14]

In Formula 14, 3 ≤ x + y + z ≤ 60.

The magnesium silicate mineral powder may include a mineral represented by the following Chemical Formula 15.

[Formula 15]

Mg ₄ Si ₆ O ₁₅ (OH) ₂ 6H ₂ O

The carbon fiber powder may include rod-shaped carbon fiber particles.

The carbon fiber particles may have an average diameter of 7.5 μm or less and an average length of 150 μm or less.

The colorant may include titanium dioxide (TiO ₂ ) and copper phthalocyanine [(C ₆ H ₄ C ₂ N) ₄ N ₄ Cu].

The second component may further include quaternary ammonium compounds.

The second component may further include a UV absorber.

Another embodiment of the present invention includes the step of spraying the composition for forming a polyurea waterproof coating film on a painting target using a spray gun, wherein the spray gun includes a first supply nozzle and a second supply nozzle and the first component is supplied to the spray gun through the first supply nozzle, the second component is supplied to the spray gun through the second supply nozzle, and the first component and the second component are It provides a polyurea waterproof coating method that is sprayed after mixing in a spray gun.

The polyurea waterproof coating method may further include forming a primer layer on the coating object before spraying the composition for forming the polyurea waterproof coating film.

The polyurea waterproofing coating method may further include forming a filling part to fill the concave part of the coating object.

The first component is discharged from the first tank for storing the first component to the spray gun, the second component is discharged from the second tank for storing the second component to the spray gun, the first tank The discharge pressure of the first component discharged from the to the spray gun and the discharge pressure of the second component discharged from the second tank to the spray gun may be in the range of 100 to 160 kgf/cm ² , respectively.

A difference between the discharge pressure of the first component and the discharge pressure of the second component may be 10 kgf/cm ² or less.

The primer layer is formed by a primer composition, and the primer composition is, based on the total weight of the primer composition, 40 to 50% by weight of methyl methacrylate, 40 to 50% by weight of unsaturated polyester, and 10 to 30% by weight % of ethylene glycol methacrylate.

The composition for forming a polyurea waterproof coating film according to an embodiment of the present invention can be cured quickly, and by curing, a polyurea waterproof coating film having excellent waterproof, anticorrosive, salt and stain resistance properties can be formed. When the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention is used, waterproofing can be performed quickly.

In addition, since the polyurea waterproof coating film formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention contains magnesium silicate mineral powder and carbon fiber powder, it has excellent adhesion and adhesion stability to concrete. and has excellent durability.

According to an embodiment of the present invention, since the composition for forming a polyurea waterproof coating film can be cured quickly, dripping of the composition for forming a polyurea waterproof coating film during operation can be prevented, thereby providing a uniform and stable waterproof coating A film may be formed.

1 is a cross-sectional view of a waterproof coating structure of concrete according to an embodiment of the present invention.
2 is a cross-sectional view of a waterproof coating structure of concrete according to another embodiment of the present invention.
3 is a schematic diagram of a painting apparatus for forming a polyurea waterproof coating film according to another embodiment of the present invention.
4A to 4D are process diagrams illustrating a polyurea waterproofing coating method according to another embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The embodiments of the present invention are provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, the scope of the present invention is defined in the claims It is only defined by

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, and therefore the present invention is not limited to the matters shown in the drawings. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In this specification, when a surface such as 'including', 'having', 'consisting of' is used, other parts may be added unless the expression 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

The term “at least one” should be understood to include all possible combinations of one or more related items. For example, the meaning of “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It may mean a combination of all items that can be presented from more than one.

Each feature of the various examples of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each example may be implemented independently of each other or may be implemented together in a related relationship. .

The composition for forming a polyurea waterproof coating film according to an embodiment of the present invention may be used, for example, for waterproof painting of concrete. A waterproof coating film can be formed on concrete by using the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. According to an embodiment of the present invention, the concrete waterproof coating film may be referred to as a concrete coating film or a concrete paint film.

The composition for forming a polyurea waterproof coating film according to an embodiment of the present invention includes a first component and a second component. The first component includes an isocyanate compound and the second component includes a diamine compound.

According to an embodiment of the present invention, the first component including the isocyanate compound and the second component including the diamine compound may be mixed to form polyurea. Specifically, after the first component and the second component are mixed, a polyurea coating film may be formed by being sprayed onto a coating object. The polyurea coating film according to an embodiment of the present invention may be used as a waterproofing material.

For example, according to an embodiment of the present invention, the first component and the second component are mixed and sprayed on the concrete surface, whereby a polyurea coating film may be formed on the concrete surface. By forming a polyurea coating film on the concrete surface, concrete can be waterproofed. According to an embodiment of the present invention, the "polyurea coating film" is referred to as a "polyurea waterproof coating film".

According to an embodiment of the present invention, the first component and the second component have a volume ratio of 1:0.9 to 1:1.1. To form the polyurea coating film, the first component and the second component may be mixed and used in a volume ratio of 1:0.9 to 1:1.1.

According to an embodiment of the present invention, the first component and the second component may be used in substantially the same volume. Since the first component and the second component can be used in the same volume, it is easy to calculate the usage amount of the first component and the second component. Therefore, using the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention, it is possible to easily form a polyurea coating film.

In addition, according to an embodiment of the present invention, the first component and the second component may be mixed and used in a volume ratio of 1:1 to 1:1.1. For example, the first component and the second component may be used in the same volume, or the second component may be used more than the first component in a volume ratio of 10% or less.

According to one embodiment of the present invention, the first component comprises a pre-polymer, a phosphate and a plasticizer. The first component may include 85 to 98% by weight of a prepolymer, 0.2 to 10% by weight of a phosphate, and 1 to 10% by weight of a plasticizer, based on the total weight of the first component.

The prepolymer according to an embodiment of the present invention has a urethane group and an isocyanate group. As the phosphate, a trishaloalkyl-based phosphate may be used. As the plasticizer, a dibenzoate-based plasticizer may be used.

The prepolymer is a major component of the first component. When the content of the prepolymer is less than 85% by weight based on the total weight of the first component, the polyurea coating film formation efficiency by mixing the first component and the second component may be reduced. When the content of the prepolymer exceeds 98% by weight based on the total weight of the first component, the stability of the first component may be reduced, and the flexibility of the polyurea coating film formed by mixing the first component and the second component is lowered. As a result, the coating film may be cracked or lifted.

The prepolymer according to an embodiment of the present invention may be formed by a mixture of a diisocyanate compound and a polyol. A prepolymer can be said to be the result of making a highly reactive diisocyanate compound into a low-molecular-weight, easy-to-handle intermediate product. By stopping the polycondensation reaction of the isocyanate compound and the polyol at an appropriate stage, a prepolymer, a relatively low molecular weight, tractable intermediate product, is prepared. This prepolymer may have both a urethane group and an isocyanate group.

According to an embodiment of the present invention, the diisocyanate compound and the polyol may be partially polymerized. The prepolymer formed by partial polymerization of the diisocyanate compound and the polyol may have both a urethane group and an unresponsive isocyanate group. According to an embodiment of the present invention, the prepolymer has isocyanate groups (-NCO groups) at both ends in a non-crosslinked, viscous resin state.

The diisocyanate compound and the polyol may react to form a urethane group. According to an embodiment of the present invention, although the urethane group formation reaction occurs by polycondensation, on the basis of the molar ratio, the diisocyanate compound is used in a large amount compared to the polyol, so that some of the isocyanate groups of the diisocyanate compound do not react and remain Thus, the prepolymer may have an isocyanate group. The prepolymer according to an embodiment of the present invention is not crosslinked and does not react to cause a solid phase.

In the prepolymer formation process, the polyol and the diisocyanate compound may be mixed in a weight ratio of 1:1 to 1.5. According to an embodiment of the present invention, since the molecular weight of the diisocyanate compound is smaller than that of the polyol, even if a polyol and a diisocyanate compound having a similar weight are used, the number of moles of the diisocyanate compound is greater than the number of moles of the polyol. According to an embodiment of the present invention, when the polyol and the diisocyanate compound are mixed in a weight ratio of 1:1 to 1:1.5, by adjusting the type or molecular weight of the polyol, a prepolymer having both a urethane group and an isocyanate group can be made. there is.

When the weight of the diisocyanate compound relative to 1 weight of the polyol is less than 1, the diisocyanate compound is not sufficient. The curing time of the composition for forming a polyurea waterproof coating film becomes long, and non-curing may occur. When the weight of the diisocyanate compound relative to 1 weight of the polyol exceeds 1.5, the diisocyanate compound is present in excess, so that the coating film formed by the composition for forming a polyurea waterproof coating film is cured more than necessary, and the expansion and contraction of the structure to be painted As it cannot withstand the deformation caused by this, phenomena such as swelling, cracking, lifting, and peeling of the coating film may occur.

According to an embodiment of the present invention, the diisocyanate compound may include methylenebisphenyl isocyanate.

As methylenebisphenyl isocyanate, for example, 1,1'-methylenebis[4-isocyanatobenzene](1,1'-methylenebis[4-isocyanatobenzene]) represented by the following Chemical Formula 1 may be used.

[Formula 1]

According to an embodiment of the present invention, the polyol may include polypropylene glycol and trihydric alcohol.

Polypropylene glycol can react with a diisocyanate compound to form a prepolymer having both a urethane group and an isocyanate group. Polypropylene glycol may be represented by the following formula (2).

[Formula 2]

In Formula 2, m is an integer of 17 to 70. More specifically, in Formula 2, m may be an integer of 34 to 52.

According to an embodiment of the present invention, polypropylene glycol may have a molecular weight (number average molecular weight; Mn) of 1000 to 4000. More specifically, polypropylene glycol may have a molecular weight of 2000 to 3000 (number average molecular weight, Mn). When polypropylene glycol having the above molecular weight range is used, a prepolymer having both a urethane group and an isocyanate group can be easily formed.

According to an embodiment of the present invention, the trihydric alcohol may include 1,1,1-trimethylolpropane. 1,1,1-trimethylolpropane may be represented by Formula 3 below.

[Formula 3]

The trihydric alcohol may react with the diisocyanate compound to form a prepolymer having both a urethane group and an isocyanate group. According to one embodiment of the present invention, a small amount of trihydric alcohol is used.

According to an embodiment of the present invention, polypropylene glycol and trihydric alcohol may be mixed in a weight ratio of 95 to 99: 1 to 5. A small amount of trihydric alcohol may react with the diisocyanate compound to form a low molecular weight prepolymer. The low molecular weight prepolymer prevents bulk formation, improves workability of the first component, and prevents the prepolymer from being uncrosslinked when forming a polyurea coating film.

According to an embodiment of the present invention, the prepolymer formed by a mixture containing methylenebisphenyl isocyanate, polypropylene glycol and trihydric alcohol may have both a urethane group and an isocyanate group, and may maintain an uncrosslinked state, It can have excellent workability.

According to an embodiment of the present invention, although a urethane group-forming reaction by polycondensation occurs during the prepolymer formation process, the diisocyanate compound is used in excess compared to the polyol based on the number of moles, so that some of the isocyanate groups do not react and remain Thus, the prepolymer may have an isocyanate group.

The prepolymer according to an embodiment of the present invention, for example, having an isocyanate group at both terminals, may be represented by the following Chemical Formula (4).

[Formula 4]

In Formula 4, R ¹ is a group derived from polyol. According to an embodiment of the present invention, R ¹ may include, for example, at least one of a group represented by Formula 5 and a group represented by Formula 6 below.

[Formula 5]

In Formula 5, n is an integer of 16 to 69.

[Formula 6]

In Formulas 5 and 6, an asterisk (*) indicates a connection site.

The urethane group included in the prepolymer enhances the elasticity of the polyurea coating film formed by the composition for forming a polyurea waterproof coating film, thereby imparting stability to the polyurea coating film formed on the concrete surface. In addition, the urethane group may be crosslinked with other reactive groups to improve the stability of the polyurea coating film. Accordingly, it is possible to prevent cracks or cracks from occurring in the coating film while having excellent waterproof properties without reducing strength.

According to one embodiment of the present invention, the first component comprises a phosphate. A trishaloalkyl-based phosphate may be used as the phosphate. Trishaloalkyl phosphate salts can include, for example, tris(1-chloro-2-propyl)phosphate.

The phosphate does not directly react with the prepolymer, and may improve the stability of the prepolymer. Phosphate may have an amount of 0.2 to 10% by weight based on the total weight of the first component. When the phosphate content is less than 0.2 wt%, crosslinking may occur in the prepolymer. When the content of the phosphate exceeds 10 wt%, the reaction rate when the first component and the second component are mixed to form a polyurea may decrease. More specifically, the first component may include 0.5 to 2% by weight of phosphate based on the total weight of the first component.

According to one embodiment of the present invention, the first component comprises a plasticizer. The plasticizer may impart flexibility to the polyurea coating film formed by the composition for forming a polyurea waterproof coating film. A dibenzoate-based plasticizer may be used as the plasticizer.

For example, the plasticizer may include oxybispropanol dibenzoate, which is represented by Chemical Formula 7 below.

[Formula 7]

The plasticizer may have an amount of 1 to 10% by weight based on the total weight of the first component. When the content of the plasticizer is less than 1% by weight, the flexibility of the prepolymer and polyurea coating film may be deteriorated. When the content of the plasticizer exceeds 10% by weight, the reaction rate may decrease when the first component and the second component are mixed to form a polyurea.

According to an embodiment of the present invention, the first component and the second component do not include a solvent. Therefore, there is no need to go through a process of removing the solvent when forming the coating film, and problems such as generation of bubbles due to the removal of the solvent do not occur.

According to an embodiment of the present invention, the first component and the second component are prepared independently of each other and stored and distributed separately. During the coating film forming operation, the first component and the second component are mixed and then sprayed, and the first component and the second component are polymerized to form polyurea.

The second component contains diaminopolypropylene glycol, diethylmethylbenzenediamine, polypropylene oxide-based triamine, triethanolamine, magnesium silicate mineral powder, carbon fiber powder, and a colorant.

More specifically, the second component is, based on the total weight of the second component, 60 to 70% by weight of diaminopolypropylene glycol, 10 to 20% by weight of diethylmethylbenzenediamine, 10 to 20% by weight of polypropylene oxide It may include a triamine-based triamine, 1 to 10% by weight of triethanolamine, a mixed powder of milled carbon fiber powder and magnesium silicate mineral powder, and 1 to 10% by weight of a colorant. The mixed powder of carbon fiber powder and magnesium silicate mineral may include 1 to 10% by weight of milled carbon fiber powder and 0.3 to 3% by weight of magnesium silicate mineral powder based on the total weight of the second component. there is.

Diamino polypropylene glycol is a diamine compound. According to an embodiment of the present invention, diamino polypropylene glycol may be represented by the following formula (8).

[Formula 8]

In Formula 8, o is an integer of 5 to 70. More specifically, in Formula 8, o may be an integer of 17 to 52.

According to an embodiment of the present invention, diaminopolypropylene glycol may have a molecular weight (number average molecular weight; Mn) of 400 to 4000. More specifically, the diaminopolypropylene glycol may have a molecular weight of 1000 to 3000 (number average molecular weight, Mn).

The diaminopolypropylene glycol reacts with the prepolymer of the first component to form a polyurea.

Since diaminopolypropylene glycol is an oligomeric diamine, the polymer formed by diamino polypropylene glycol and the prepolymer has a small number of urea groups relative to its molecular weight.

According to an embodiment of the present invention, diaminopolypropylene glycol and the prepolymer may form polyurea according to the following Reaction Scheme 1.

[Scheme 1]

In Scheme 1, p is a repeating unit.

In Scheme 1, R may be, for example, represented by the following Chemical Formula 9.

[Formula 9]

In Formula 13, R ¹ is a group derived from a polyol, as described in Formula 4, and includes, for example, at least one of a group represented by Formula 5 and a group represented by Formula 6 can do.

In Scheme 1, R' may be, for example, represented by the following Chemical Formula 10.

[Formula 10]

In Formula 10, o may be an integer of 5 to 70, and more specifically, an integer of 17 to 52, as described in Formula 8.

The coating film including polyurea formed according to Scheme 1 may have excellent film stability, may have oxygen (O) in the middle of the molecule, and may have excellent waterproof properties.

In order for the polyurea coating film to have excellent film stability and excellent waterproofing properties, the second component includes 60 to 70% by weight of diaminopolypropylene glycol based on the total weight of the second component. With respect to the total weight of the second component, when the content of diaminopolypropylene glycol is less than 60% by weight, the stability and waterproof properties of the polyurea coating film may be deteriorated, and when it exceeds 70% by weight, the composition for forming a polyurea waterproof coating film workability may be reduced.

Diethylmethylbenzenediamine is a diamine compound. According to an embodiment of the present invention, diethylmethylbenzenediamine may be represented by any one of the following Chemical Formulas 11 to 13. According to an embodiment of the present invention, diethylmethylbenzenediamine may include at least one of compounds represented by the following Chemical Formulas 11 to 13.

[Formula 11]

[Formula 12]

[Formula 13]

Diethylmethylbenzenediamine reacts with the prepolymer of the first component to form a polyurea. Since diethylmethylbenzenediamine has a relatively small molecular weight compared to diaminopolypropylene glycol, the polymer formed by diethylmethylbenzenediamine and the prepolymer has a relatively large number of urea groups compared to the molecular weight. can Diethylmethylbenzenediamine having a molecular weight smaller than that of diaminopolypropylene glycol can efficiently form polyurea.

Since the polymer formed by diethylmethylbenzenediamine and the prepolymer may have a relatively large number of urea groups compared to the molecular weight, diethylmethylbenzenediamine is used in the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. Curing may be accelerated. Thus, diethylmethylbenzenediamine can act as a curing agent or curing catalyst.

The second component includes 10 to 20% by weight of diethylmethylbenzenediamine based on the total weight of the second component. When the content of diethylmethylbenzenediamine is less than 10% by weight based on the total weight of the second component, curing may be delayed when a coating film is formed using the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. When the content of diethylmethylbenzenediamine exceeds 20% by weight based on the total weight of the second component, the curing of the polyurea coating film made of the composition for forming a polyurea waterproof coating film is excessive, and cracks or cracks occur in the coating film This can increase.

The polypropylene oxide-based triamine is an oligomer having three amine groups.

According to an embodiment of the present invention, the polypropylene oxide-based triamine may be, for example, represented by the following Chemical Formula 14.

[Formula 14]

In the formula (14), 3 ≤ x + y + z ≤ 60.

The polypropylene oxide-based triamine may react with the prepolymer of the first component to form polyurea. The polypropylene oxide-based triamine is a triamine having a relatively large molecular weight, and the polyurea formed by the polypropylene oxide-based triamine and the prepolymer has a small number of urea groups compared to the molecular weight.

Polypropylene oxide-based triamine can improve the flexibility and waterproof properties of the polyurea coating film. By using the polypropylene oxide-based triamine, the occurrence of cracks or cracks in the polyurea coating film made of the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention can be reduced.

According to an embodiment of the present invention, the second component may include 10 to 20% by weight of polypropylene oxide-based triamine based on the total weight of the second component.

Based on the total weight of the second component, if the content of polypropylene oxide-based triamine is less than 10% by weight, the occurrence of cracks or cracks in the polyurea coating film may increase, and if it exceeds 20% by weight, for forming a polyurea waterproof coating film The curing properties and workability of the composition may be deteriorated.

Triethanolamine is a tertiary amine and at the same time a trihydric alcohol. Triethanolamine is used in a small amount to improve the fluidity of the second component, thereby improving the workability of the composition for forming a polyurea waterproof coating film. Since triethanolamine has an alcohol group, it can react with the prepolymer of the first component to form a urethane group. The urethane group formed in this way can participate in crosslinking and accelerate curing of the polyurea coating film.

According to an embodiment of the present invention, the second component may include 1 to 10% by weight of triethanolamine based on the total weight of the second component.

With respect to the total weight of the second component, if the content of triethanolamine is less than 1% by weight, the fluidity of the second component may decrease and the workability of the composition for forming a polyurea waterproof coating film may decrease, and when it exceeds 10% by weight Urea group formation may be reduced.

The mixed powder of milled carbon fiber powder and magnesium silicate mineral may be prepared by mixing and dispersing carbon fiber powder and magnesium silicate mineral powder in a dispersion solvent, pulverizing, drying, and re-grinding.

According to an embodiment of the present invention, milled carbon fiber powder may be manufactured by pulverizing carbon fibers or carbon nanotubes. Carbon fibers or carbon nanotubes may be pulverized by a mill method.

According to an embodiment of the present invention, the milled carbon fiber powder may include rod-shaped carbon fiber particles. The carbon fiber particles constituting the milled carbon fiber powder may have a cylindrical rod shape, and may have an average diameter of 7.5 μm or less and an average length of 150 μm or less. More specifically, the carbon fiber particles constituting the carbon fiber powder according to an embodiment of the present invention may have an average diameter of 7.5 μm or less and an average length of 100 μm or less. For example, the carbon fiber particles constituting the carbon fiber powder according to an embodiment of the present invention may have an average diameter of 5 to 7.5 μm or less and an average length of 30 to 100 μm.

Carbon fiber powder has good compatibility with urea groups and urethane groups, and has good compatibility with concrete and components. Therefore, the carbon fiber powder can improve the adhesion between the polyurea coating film formed by the composition for forming a polyurea waterproof coating film and concrete. In addition, the carbon fiber powder has excellent compatibility with the magnesium silicate mineral powder, thereby increasing the effect of improving the adhesion between the polyurea coating film and the concrete by the magnesium silicate mineral powder.

With respect to the total weight of the second component, when the content of the carbon fiber powder is less than 1% by weight, the effect of improving the adhesion between the polyurea coating film and the concrete by the carbon fiber powder may or may not be almost exhibited. On the other hand, when the content of the carbon fiber powder exceeds 10% by weight based on the total weight of the second component, the dispersibility of the carbon fiber powder in the second component is lowered, and the carbon fiber powder is not uniformly dispersed but precipitated or aggregated can be

Therefore, according to an embodiment of the present invention, the content of the carbon fiber powder included in the second component is adjusted to be in the range of 1 to 10% by weight based on the total weight of the second component.

The magnesium silicate mineral powder may serve as a thickener for increasing the viscosity of the composition for forming a polyurea waterproof coating film, and may serve as an anti-settling agent. In addition, the magnesium silicate mineral powder allows the polyurea coating film according to an embodiment of the present invention to have excellent adhesion to concrete.

According to an embodiment of the present invention, the magnesium silicate mineral powder may include a mineral represented by the following Chemical Formula 15.

[Formula 15]

Mg ₄ Si ₆ O ₁₅ (OH) ₂ 6H ₂ O

According to an embodiment of the present invention, magnesium silicate mineral powder containing magnesium (Mg) and silicon (Si) improves the adhesion between the composition for forming a polyurea waterproof coating film and concrete and absorbs moisture, thereby providing a waterproof coating with polyurea. It is possible to improve the weatherability and durability of the polyurea coating film formed by the film-forming composition.

According to an embodiment of the present invention, the second component may include 0.3 to 3% by weight of magnesium silicate mineral powder based on the total weight of the second component. When the content of the magnesium silicate mineral powder is less than 0.3% by weight based on the total weight of the second component, the viscosity of the composition for forming a polyurea waterproof coating film may decrease and workability may be reduced, and between the polyurea coating film and concrete The effect of improving the adhesive strength may hardly be observed. When the content of the magnesium silicate mineral powder exceeds 3% by weight based on the total weight of the second component, the magnesium silicate mineral powder is not uniformly dispersed and precipitated or aggregated due to an excessive amount of inorganic material to form a polyurea waterproof coating film workability may be reduced, and the formation of a urea group may be lowered, so that curing of the composition for forming a polyurea waterproof coating film may be delayed.

According to an embodiment of the present invention, the magnesium silicate mineral powder may have an average particle diameter of 200 μm or less. For example, the magnesium silicate mineral powder according to an embodiment of the present invention may have an average particle diameter of 1 to 200 μm. According to an embodiment of the present invention, when the composition for waterproofing is used in the composition for waterproofing concrete, the magnesium silicate mineral powder may have an average particle diameter of 1 to 100 μm, and more specifically, may have an average particle diameter of 2 to 50 μm, , may have an average particle diameter of 2 to 10 μm, or may have an average particle diameter of 20 to 50 μm.

According to an embodiment of the present invention, the carbon fiber powder and the magnesium silicate mineral powder may be mixed and pulverized to be used in a mixed powder form.

For example, 40 to 60 parts by weight of carbon fiber powder and 12 to 18% by weight of magnesium silicate mineral powder are simultaneously added to 100 parts by weight of isopropyl alcohol (IPA), which is a dispersion solvent, and then, while applying ultrasonic waves, the carbon fiber using a ball mill is used. Fiber powder and magnesium silicate mineral powder can be mixed and dispersed. At this time, the dispersion may be made for 1 to 5 hours at a rate of 100 to 500 rev/min (rpm). As a result, a mixture in a slurry state is obtained. After drying the obtained mixed slurry in an oven at 150° C. for 24 to 48 hours, the dried slurry is uniformly pulverized to obtain a mixed powder of carbon fiber powder and magnesium silicate mineral powder.

A zirconium ball mill may be used as a ball mill for producing the mixed powder, and a homogenizer grinder may be used as the grinder.

According to one embodiment of the present invention, the second component comprises a colorant. The colorant imparts color to the composition for forming a polyurea waterproof coating film and the polyurea coating film. The colorant is, for example, an inorganic substance.

According to an embodiment of the present invention, the second component may include 1 to 10% by weight of the colorant based on the total weight of the second component. Based on the total weight of the second component, if the content of the colorant is less than 1% by weight, the coloring is not performed properly, and when it exceeds 10% by weight, the workability of the composition for forming a polyurea waterproof coating film is lowered due to excessive inorganic substances and the formation of a urea group may be reduced, so that curing of the composition for forming a polyurea waterproof coating film may be delayed.

The colorant may include two or more components.

According to an embodiment of the present invention, the colorant may include titanium dioxide (TiO ₂ ) and copper phthalocyanine [(C ₆ H ₄ C ₂ N) ₄ N ₄ Cu]. Titanium dioxide is white, and copper phthalocyanine is blue. Titanium dioxide (TiO ₂ ) can act as a thickener as well as a colorant.

Titanium dioxide and copper phthalocyanine may be mixed and used in a ratio of 1:0.1 to 1 by weight. When copper phthalocyanine of 10% or more based on the weight of titanium dioxide is used, a blue-based color may be expressed. When copper phthalocyanine in a larger amount than titanium dioxide is used, it may not be easy to control the color of the composition for forming a polyurea waterproof coating film and the polyurea coating film.

The composition for forming a polyurea waterproof coating film according to an embodiment of the present invention may further include other colorants to express various colors.

According to one embodiment of the present invention, the second component may further include quaternary ammonium compounds (Quaternary Ammonium Compounds). As the quaternary ammonium compound, an ammonium compound including both an aromatic group and an aliphatic group may be used.

According to an embodiment of the present invention, a compound represented by the following Chemical Formula 16 may be used as the quaternary ammonium compound.

[Formula 16]

According to an embodiment of the present invention, the quaternary ammonium compound has excellent affinity with a urea group and a urethane group, and has excellent elasticity due to an aliphatic group.

When the second component includes a quaternary ammonium compound having both an aromatic group and an aliphatic group, the flexibility of the polyurea coating film made of the composition for forming a polyurea waterproof coating film increases, and the occurrence of cracks or cracks can be reduced.

The quaternary ammonium compound having both an aromatic group and an aliphatic group has excellent affinity with the primer components used for painting concrete, and can improve the paintability of the composition for forming a polyurea waterproof coating film on concrete.

The quaternary ammonium compound may be used in an amount of 0.1 to 1% by weight based on the total weight of the second component.

According to an embodiment of the present invention, the second component may further include a UV absorber. The ultraviolet absorbent according to an embodiment of the present invention may include an amino benzoate-based compound. As the ultraviolet absorber, for example, a compound represented by Chemical Formula 17 may be used.

[Formula 17]

The ultraviolet absorber may be used in an amount of 0.1 to 1% by weight based on the total weight of the second component.

According to an embodiment of the present invention, the first component and the second component are mixed just before the coating film is formed, and then sprayed to the coating object in a mixed state and then cured. The mixture of the first component and the second component is cured to form a polyurea coating film. The polyurea coating film formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention has excellent waterproof, anticorrosive, flame-resistant, and contamination-resistant properties, and there is no or very little occurrence of cracks or cracks.

1 is a cross-sectional view of a waterproof coating structure 100 of concrete according to an embodiment of the present invention. Figure 1, for example, can be said to be a waterproof coating structure for a concrete floor surface.

Referring to FIG. 1 , the waterproof coating structure 100 of concrete includes a primer layer 120 disposed on the concrete 110 , a filling part 130 filling the concave part 111 of the primer layer 120 , and a filling part. and a polyurea coating film 140 disposed on the part 130 and the primer layer 120 . The polyurea coating film 140 may be formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention.

2 is a cross-sectional view of the waterproof coating structure 200 of concrete according to another embodiment of the present invention. Figure 2, for example, can be said to be a waterproof coating structure for a concrete wall surface.

Referring to FIG. 2 , in the waterproof coating structure 200 of concrete according to another embodiment of the present invention, a primer layer 220 disposed on the concrete 210 , a filling part filling the recesses of the primer layer 220 . 230 , a polyurea coating layer 240 disposed on the filling part 230 and the primer layer 220 , and a second layer 250 disposed on the polyurea coating layer 240 .

In FIG. 2 , the polyurea coating film 240 may be formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. In addition, the second layer 250 may also be formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention.

Another embodiment of the present invention provides a polyurea waterproof coating method. Hereinafter, the waterproof coating structures 100 and 200 of concrete together with the polyurea waterproof coating method will be described in detail.

The polyurea waterproofing coating method according to another embodiment of the present invention includes spraying a composition for forming a polyurea waterproofing coating film on a painting target using a spray gun 330 . Hereinafter, a polyurea waterproofing coating method according to another embodiment of the present invention will be described with a focus on the embodiment in which the coating target is concrete.

3 is a schematic diagram of a coating apparatus 300 for forming a polyurea waterproof coating film according to another embodiment of the present invention.

The painting apparatus 300 according to another embodiment of the present invention includes a first tank 310 for storing a first component, a second tank 320 for storing a second component, and a first for supplying the first component. It includes a first supply pipe 311 , a second supply pipe 321 for supplying a second component, and a spray gun 330 .

The spray gun 330 includes a first supply nozzle 331 and a second supply nozzle 332 .

The first supply nozzle 331 is connected to the first supply pipe 311 , and the first component is supplied to the spray gun 330 through the first supply nozzle 331 . The second supply nozzle 332 is connected to the second supply pipe 321 , and the second component is supplied to the spray gun 330 through the second supply nozzle 332 . Referring to FIG. 3 , the first component is supplied to the spray gun 330 through the first supply nozzle 331 , and the second component is supplied to the spray gun 330 through the second supply nozzle 332 .

The first component and the second component are mixed in the spray gun 330 and then sprayed.

More specifically, the first component and the second component are mixed in the body 334 of the spray gun 330, through the spray nozzle 333, is sprayed to a painting object, for example, concrete.

The spray gun 330 may include a handle 335 and an injection valve 336 , and the injection amount may be adjusted by the injection valve 336 .

According to another embodiment of the present invention, the first component is discharged from the first tank 310 to the spray gun 330 , and the second component is discharged from the second tank 320 to the spray gun 330 . . The discharge pressure of the first component discharged from the first tank 310 to the spray gun 330 and the discharge pressure of the second component discharged from the second tank 320 to the spray gun 330 are 100 to 160 kgf/ It can be made to be in the range of cm ² . The difference between the discharge pressure of the first component and the discharge pressure of the second component is 10 kgf/cm ² or less.

4A to 4D are process diagrams illustrating a polyurea waterproofing painting method according to another embodiment of the present invention.

The polyurea waterproofing coating method according to another embodiment of the present invention may further include forming a primer layer on the coating object before spraying the composition for forming a polyurea waterproofing coating film. In addition, the polyurea waterproofing coating method according to another embodiment of the present invention may further include forming a filling part to fill the concave part of the coating object.

Specifically, the polyurea waterproofing coating method according to another embodiment of the present invention includes the steps of forming a primer layer 120 on the surface of the concrete 110 to be painted, and the primer layer 120 on the primer layer 120 . ) forming the filling part 130 to fill the recessed part 111 and forming the polyurea coating film 140 on the filling part 130 and the primer layer 120 .

4A is a partial cross-sectional view of the concrete 110 to be painted. Referring to FIG. 4A , the surface of the concrete 110 is not uniform, and concave portions 111 may exist on the surface of the concrete 110 . The concave portion 111 may be generated during the formation of the concrete 110 . The concrete 110 of FIG. 4A may form a floor of a building, for example.

Referring to FIG. 4B , in order to waterproof the concrete 110 , first, a primer layer 120 is formed on the surface of the concrete 110 . The primer layer 120 improves the adhesion between the concrete 110 and the polyurea coating film 140 .

The material for forming the primer layer 120 is not particularly limited. A commercially available primer material may be used as a material for forming the primer layer 120 shown in FIG. 4B . For example, a primer material including an epoxy resin, an ester-modified bisphenol A type epoxy resin, a silica-based primer, or 4-hydroxyphenylamine may be used to form the primer layer 120 of FIG. 4B .

According to another embodiment of the present invention, the primer layer 120 may be formed of a primer composition. The primer composition may include 40 to 50% by weight of methyl methacrylate, 40 to 50% by weight of unsaturated polyester, and 10 to 30% by weight of ethylene glycol methacrylate, based on the total weight of the primer composition. Unsaturated polyesters are polyesters having double bond functional groups.

A primer composition according to another embodiment of the present invention includes an acrylate. Acrylates may have good adhesion to concrete as well as excellent adhesion to polyurea. Therefore, in the case of including the primer layer 120 formed by the primer composition according to another embodiment of the present invention, excellent waterproof, anticorrosive, salt and stain resistance properties are easily achieved by the polyurea coating film 140 . can be

According to another embodiment of the present invention, the primer layer 120 may be formed by spraying and curing the primer composition on the concrete 110 to be painted.

The thickness of the primer layer 120 is not particularly limited. The primer layer 120 may have a thickness of 5 to 50 μm.

Even if the primer layer 120 is formed in the concrete 110, the recess 111 may still exist (see FIG. 4B). In order to improve the painting efficiency, it is preferable that these recesses 111 are filled.

Referring to FIG. 4C , the filling part 130 filling the recessed part 111 of the primer layer 120 is formed on the primer layer 120 . The concave portion 111 may be filled by the filling portion 130 to form a flat surface.

There is no particular limitation on the material of the filling part 130 . Any material that can fill the concave portion 111 formed in the concrete 110 may be used as the material of the filling portion 130 shown in FIG. 4C without limitation. The filling part 130 may be made by, for example, commercially available flame-retardant putty. The flame-retardant putty may include a rubber-modified epoxy resin, a dispersant, a viscosity modifier, ammonium polyphosphate, pentaerythitol, melamine, silica, and an inorganic additive.

Referring to FIG. 4D , a polyurea coating film 140 is formed by applying a composition for forming a polyurea waterproof coating film on the filling part 130 . The polyurea coating film 140 may be formed on the upper part of the filling part 130 and the upper part of the primer layer 120 on which the filling part 130 is not disposed.

The polyurea coating film 140 may be formed by the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. More specifically, after the first component and the second component constituting the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention are mixed in the spray gun 330, the primer layer 120 and the filling part ( 130) is sprayed on the formed concrete 110, the polyurea coating film 140 may be formed.

The polyurea coating film 140 may have a thickness of, for example, 100 to 300 μm. For example, when the concrete 110 is the floor of a building, the polyurea coating film 140 may be formed as a single layer and may have a thickness of 250 to 300 μm.

According to an embodiment of the present invention, after the first component and the second component are mixed in the spray gun 330 and sprayed, curing is completed within 30 minutes to complete the polyurea coating film 140 . By spraying the composition for forming a polyurea waterproof coating film, the concrete coating is made, so that the waterproof coating structure 100 of the concrete shown in FIG. 1 can be made.

However, another embodiment of the present invention is not limited thereto, and may include forming the second layer 250 on the polyurea coating film 140 .

Referring to FIG. 2 , the polyurea waterproofing coating method according to another embodiment of the present invention includes forming a primer layer 220 on the surface of concrete 210 to be painted, and a primer on the primer layer 220 . Forming the filling part 230 to fill the recessed portion of the layer 220, forming the polyurea coating film 240 on the filling part 230 and the primer layer 220, and the polyurea coating film 240 It may include forming the second layer 250 thereon.

The second layer 250 may be made by spraying the composition for forming a polyurea waterproof coating film according to an embodiment of the present invention. Accordingly, the second layer 250 may also be a polyurea coating film. Referring to FIG. 2 , the polyurea coating film may be formed as a multilayer film.

For example, in the case of wall painting in which the composition for forming a polyurea waterproof coating film may flow down during operation, such as a wall surface, the polyurea coating film 240 is formed thinly so that the polyurea coating film 240 is quickly removed. By curing, the composition for forming a polyurea waterproof coating film is prevented from flowing down, and a thin polyurea coating film can be formed as the second layer 250 thereon again.

By hardening the second layer 250, the waterproof coating structure 200 of the concrete shown in FIG. 2 can be made.

Hereinafter, the present invention will be described in more detail with reference to Preparation Examples, Examples, Comparative Examples and Test Examples.

<Preparation Example 1> Preparation of mixed powder particles

In a 2L reaction vessel, 500 g of isopropyl alcohol (IPA) as a dispersion solvent, 250 g of carbon fiber powder (Zolteck) and 75 g of magnesium silicate mineral powder (Sigma-Aldrich) were put in, and a ball mill was used while applying ultrasonic waves. Thus, carbon fiber powder and magnesium silicate mineral powder were mixed and dispersed at a speed of 250 rev/min (rpm) for 2 hours. The resulting slurry mixture was dried in an oven at 150° C. for 24 hours. The dried slurry was pulverized using a ball mill at a speed of 250 rev/min (rpm) for 1 hour to obtain a mixed powder of carbon fiber powder and magnesium silicate mineral powder.

<Examples 1 to 4 and Comparative Examples 1 to 3>

According to the composition of Table 1 below, compositions for forming a polyurea waterproof coating film according to Examples 1 to 4 and Comparative Examples 1 to 3 were prepared. Specifically, according to the composition of Table 1, the first component and the second component are respectively prepared. The content unit of each component disclosed in Table 1 is weight %.

division
(Unit: % by weight) Example
One Example
2 Example
3 Example
4 comparative example
One comparative example
2 comparative example
3 My
One
ingredient prepolymer 94.5 94.5 94.5 94.5 94.5 94.5 94.5 phosphate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 plasticizer 5 5 5 5 5 5 5 My
2
ingredient diaminopolypropylene glycol 60 62 64 66 70 66 67 Diethylmethylbenzenediamine 16 16 16 16 16 16 16 polypropylene oxide triamine 10 10 10 10 10 10 10 triethanolamine 3 3 3 3 Mixed powder (Preparation Example 1) 10 8 6 4 - - - carbon fiber powder - - - - 3 - magnesium silicate mineral - - - - - One 3 coloring agent One One One One One One Mixing ratio (volume ratio)
first component: second component 1:1 1:1 1:1 1:1 1:1 1:1 1:1

(1) Prepolymer: Free polymer of 1,1'-methylenebis[4-isocyanatobenzene], polypropylene glycol, and 1,1,1-trimethylolpropane (CAS No. 9020-84-2)

(2) Phosphate: tris (1-chloro-2-propyl) phosphate (CHINA QINGDAO HONG JIN CHEMICAL; TCPP)

(3) plasticizer: oxybispropanol dibenzoate (Formula 7)

(4) Diamino polypropylene glycol: Poly(propylene glycol) bis(2-aminopropyl ether) (Sigma-Aldrich)

(5) Diethylmethylbenzenediamine: 2,4-Diaminotoluene (Sigma-Aldrich)

(6) Polypropylene oxide triamine: Glycerol tris[poly(propylene glycol), amine terminated] ether (CAS No. 64852-22-8, Sigma-Aldrich)

(7) Triethanolamine: Triethanolamine (SAM CHUM Chemical)

(8) Carbon fiber powder: product of Zolteck

(9) Magnesium silicate mineral powder: manufactured by Sigma-Aldrich

(10) Colorant: 1:0.5 mixture of titanium dioxide (TiO ₂ ) and copper phthalocyanine [(C ₆ H ₄ C ₂ N) ₄ N ₄ Cu]

<Test Example>

A primer layer 120 is formed on the surface of the concrete 110 by using a primer composition comprising 45 wt% of methyl methacrylate, 45 wt% of unsaturated polyester and 10 wt% of ethylene glycol methacrylate, The composition for forming a polyurea waterproof coating film prepared in Examples 1 to 4 and Comparative Examples 1 to 3 was applied by a spray method to form a polyurea coating film 140 .

Specifically, using a painting device 300 having a spray gun 330 . After the first component and the second component were mixed in the spray gun 330 , the primer layer 120 was sprayed on the top of the concrete 110 to form the polyurea coating film 140 .

Adhesive strength, tensile strength, elongation and anticorrosive properties were measured for the polyurea coating film 140 formed in this way. The measurement results are shown in Table 2 below.

(1) Measurement of adhesion strength

In accordance with KS F 4922 standard, by measuring the breaking strength of the matrix with respect to the coating film 140, the adhesion strength of the coating film in the standard state was measured.

(2) Measurement of tensile strength

According to KS F 4922 standard, the tensile strength of the coating film 140 in a standard state was measured.

(3) Elongation measurement

According to KS F 4922 standard, the elongation of the coating film 140 in a standard state was measured.

(4) Measurement of anticorrosive properties

According to KS F 4922 standard, the tensile strength was measured after the coating film 140 was acid-treated.

division Adhesive strength
(N/mm ² ) tensile strength
(N/mm ² ) elongation
(%) Anticorrosive properties (tensile strength)
(N/mm ² ) Example 1 2.2 (Destruction of parent) 17.5 380 17.1 Example 2 2.2 (Destruction of parent) 18.3 390 18.1 Example 3 2.6 (Destruction of parent) 21.0 460 21.0 Example 4 2.5 (Destroy the parent) 19.5 430 19.3 Comparative Example 1 2.0 (Maternity Destruction) 16.2 330 14.8 Comparative Example 2 2.1 (Maternity Destruction) 19.3 440 19.0 Comparative Example 3 2.6 (Maternity Destruction) 16.3 340 15.0

Referring to Table 2, it can be seen that the polyurea coating film formed by the composition for forming a polyurea waterproof coating film according to Examples 1 to 4 has excellent adhesion strength, excellent tensile strength, excellent elongation, and excellent anticorrosive properties.

On the other hand, it can be seen that the waterproof coating film formed by the composition according to Comparative Examples 1 to 3 has low adhesion strength, low elongation, and low corrosion resistance properties as compared to Examples 1 to 4, thereby having low film stability.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible without departing from the technical matters of the present invention. It will be clear to those who have the knowledge of Therefore, the scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100, 200: Concrete waterproof coating structure
110, 210: Concrete 111, 211: Concave
120, 220: primer layer 130, 230: filling part
140, 240: polyurea coating film 250: second layer
300: painting device
310: first tank 320: second tank
311: first supply pipe 321: second supply pipe
330: spray gun 331: first supply nozzle
332: second supply nozzle 333: spray nozzle
334: body 335: handle
336: injection valve

Claims (19)

a first component comprising an isocyanate compound; and
a second component comprising a diamine compound; and
The first component is based on the total weight of the first component,
85 to 98% by weight of a prepolymer having a urethane group and an isocyanate group;
0.2 to 10 wt% of trishaloalkyl-based phosphate; and
1 to 10% by weight of a dibenzoate-based plasticizer;
The second component is based on the total weight of the second component,
60 to 70% by weight of diaminopolypropylene glycol;
10 to 20% by weight of diethylmethylbenzenediamine;
10 to 20 wt% of polypropylene oxide-based triamine;
1 to 10% by weight of triethanolamine;
mixed powder of milled carbon fiber powder and magnesium silicate mineral powder; and
1 to 10% by weight of a colorant;
The mixed powder of the carbon fiber powder and the magnesium silicate mineral includes 1 to 10% by weight of milled carbon fiber powder and 0.3 to 3% by weight of the magnesium silicate mineral powder, based on the total weight of the second component. A composition for forming a polyurea waterproof coating film. According to claim 1,
The first component and the second component have a volume ratio of 1:0.9 to 1:1.1, a composition for forming a polyurea waterproof coating film. According to claim 1,
The prepolymer is formed by a mixture of a diisocyanate compound and a polyol,
Here, the polyol and the diisocyanate compound are mixed in a weight ratio of 1:1 to 1.5, a composition for forming a polyurea waterproof coating film. 4. The method of claim 3,
The diisocyanate compound is a polyurea waterproof coating composition comprising methylenebisphenyl isocyanate. 4. The method of claim 3,
The polyol is a composition for forming a polyurea waterproof coating film comprising polypropylene glycol and trihydric alcohol. 6. The method of claim 5,
The polypropylene glycol and the trihydric alcohol are mixed in a weight ratio of 95 to 99:1 to 5, a composition for forming a polyurea waterproof coating film. According to claim 1,
The polypropylene oxide-based triamine is represented by the following Chemical Formula 14, a composition for forming a polyurea waterproof coating film:
[Formula 14]

In Formula 14, 3 ≤ x + y + z ≤ 60. According to claim 1,
The magnesium silicate mineral powder is a composition for forming a polyurea waterproof coating film comprising a mineral represented by the following formula (15).
[Formula 15]
Mg ₄ Si ₆ O ₁₅ (OH) ₂ 6H ₂ O According to claim 1,
The carbon fiber powder, comprising rod (rod)-shaped carbon fiber particles, polyurea waterproof coating composition for forming a coating film. 10. The method of claim 9,
The carbon fiber particles have an average diameter of 7.5 μm or less and an average length of 150 μm or less, a composition for forming a polyurea waterproof coating film. According to claim 1,
The colorant comprises titanium dioxide (TiO ₂ ) and copper phthalocyanine [(C ₆ H ₄ C ₂ N) ₄ N ₄ Cu], a composition for forming a waterproof coating film of polyurea. According to claim 1,
The second component further comprises a quaternary ammonium compound (Quaternary Ammonium Compounds), polyurea waterproof coating composition for forming a coating film. According to claim 1,
The second component further comprises a UV absorber, a composition for forming a waterproof coating film of polyurea. Claims 1 to 13, comprising the step of spraying the composition for forming a waterproof coating film of polyurea according to any one of claims 1 to 13 on the object to be painted using a spray gun,
The spray gun includes a first supply nozzle and a second supply nozzle,
The first component is supplied to the spray gun through the first supply nozzle,
The second component is supplied to the spray gun through the second supply nozzle,
The first component and the second component are sprayed after being mixed in a spray gun,
Polyurea waterproof coating method. 15. The method of claim 14,
Before spraying the composition for forming the polyurea waterproof coating film, further comprising the step of forming a primer layer on the coating object, the polyurea waterproof coating method. 15. The method of claim 14,
Further comprising the step of forming a filling portion to fill the concave portion of the painting object, polyurea waterproof painting method. 15. The method of claim 14,
The first component is discharged from the first tank storing the first component to the spray gun,
The second component is discharged from the second tank storing the second component to the spray gun,
The discharge pressure of the first component discharged from the first tank to the spray gun and the discharge pressure of the second component discharged from the second tank to the spray gun are each in the range of 100 to 160 kgf/cm ² Poly Urea waterproof coating method. 18. The method of claim 17,
The difference between the discharge pressure of the first component and the discharge pressure of the second component is 10 kgf/cm ² or less, polyurea waterproofing coating method. 16. The method of claim 15,
The primer layer is formed by a primer composition,
The primer composition, based on the total weight of the primer composition,
40 to 50% by weight of methyl methacrylate;
40 to 50% by weight of an unsaturated polyester; and
Polyurea waterproofing coating method comprising; 10 to 30% by weight of ethylene glycol methacrylate.

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