KR102279460B1 - Coating composition for concrete and steel structures using fluororesin components, manufacturing method thereof, and surface coating method using the same - Google Patents

Abstract

The present invention relates to a coating composition for a concrete structure and a steel structure using a fluororesin component, a method or preparing the same, and a surface coating method using the same. More specifically, the present invention has effects of preventing dew concentration due to a polluant in an atmosphere, snow, rain, an infrared ray, a ultraviolet ray, and a temperature difference, by including any one or a plurality of additives selected from polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, acrylic resin, silicone resin, dispersants, light stabilizers, defoaming agents, and solvents, an intermediate agent, and a top coating agent. In addition, the intermediate agent and the top coating agent facilitate the coupling between paints and pigments at a higher ratio, such that various colors may be made in a smaller amount.

Description

Coating composition for concrete and steel structures using a fluororesin component, a manufacturing method therefor, and a surface coating method using the same {Coating composition for concrete and steel structures using fluororesin components, manufacturing method thereof, and surface coating method using the same}

The present invention relates to a coating composition for a concrete structure and a steel structure using a fluororesin component, a method for manufacturing the same, and a surface coating method using the same, and more specifically, polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, Coating of concrete and steel structures using a fluororesin component, characterized in that it contains any one or a plurality of additives selected from powder polytetrafluoroethylene, acrylic resin, silicone resin, dispersant, light stabilizer, defoaming agent and solvent It is a technical field related to a composition, a method for manufacturing the same, and a surface coating method using the same.

In general, steel structures such as bridges, overpasses, and steel structures are made of iron and have a defect called corrosion (rust). Steel structures made of such iron contain sulfur dioxide (SO ₂ ), hydrogen sulfide (H ₂ S), chlorine ions, fine dust, heavy metals, snow, rain, ultraviolet rays, infrared rays, temperature and humidity, which are pollutants in the air, and these substances Corrosion can be further accelerated by

As a method to prevent weakening of the durability of such steel structures, a coating method is being developed in which paints such as absorption inhibitors, surface protection agents, and coating agents are applied to the surface of steel structures.

Problems such as pollution problems or adverse effects on the human body occur, and there is an urgent need to develop a composition for a steel structure that blocks ultraviolet and infrared rays and has a thermal insulation function to suppress the occurrence of dew condensation and a technology development for a surface coating method using the same.

In addition, in the structure made of concrete, carbon dioxide, chloride, various harmful substances, etc. penetrate from the surface of the concrete to the inside, thereby reducing durability. In order to prevent the deterioration of durability, there is a need for research on developing a surface treatment material for improving durability among various economical and easy techniques that can effectively control the deterioration of concrete performance.

In order to maintain the environmental importance of the concrete structure, attention has been focused on the method of finishing the structure with contamination prevention and cleaning properties, and in order to solve this problem, a painting material with a function to prevent contamination itself in advance is recently installed on the concrete surface. method has been proposed. As such coating materials, epoxy-based, urethane-based, vinyl ester-based, fluororesin-based, acrylic rubber-based and the like are used.

However, when the epoxy-based and urethane-based coating materials are used, they do not reach a satisfactory level to respond to external environmental conditions such as acid rain, polluted air, carbon dioxide, sulfur dioxide, salt damage, etc., and the pollutants, ultraviolet rays, infrared rays, and temperature There is an urgent need to develop a coating composition for a concrete structure and a surface coating method using the same to prevent contamination by condensation, etc.

That is, both the steel structure and the concrete structure, which are facilities including road signs, street lights, traffic lights, median strips, guard rails, boundary stones, etc. to which the paint is applied, are not subjected to the heavy-duty paint maintenance method, but air pollutants, ultraviolet rays, and infrared rays. It is necessary to develop a technology for a paint coating composition that can protect against , dew, and the like, and a surface coating method using the same.

Republic of Korea Patent Registration No. 10-1534223 (June 30, 2015)

The present invention is a technology devised to solve the problems according to the above-described prior art, and the conventional concrete structures and steel structures are sulfuric acid gas (SO ₂ ), hydrogen sulfide (H ₂ S), chlorine ions, fine dust, heavy metals, snow, In order to solve problems such as corrosion, condensation, and contamination caused by rain, ultraviolet rays, infrared rays, temperature and humidity, the present inventors have prepared polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, acrylic resin, A coating composition for concrete and steel structures using a fluororesin component, characterized in that it comprises any one or a plurality of additives selected from silicone resin, dispersant, light stabilizer, defoaming agent and solvent, manufacturing method therefor, and surface coating using the same Its main purpose is to provide a method.

The present invention is selected from among polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, acrylic resin, silicone resin, dispersant, light stabilizer, defoaming agent and solvent in order to realize the desired purpose as described above. It provides a coating composition for a concrete structure and a steel structure, characterized in that it comprises any one or a plurality of additives.

In addition, the antifoaming agent of the present invention comprises at least one selected from modified silicones, fatty acids, higher alcohols, minerals, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica, and perfluoroalkyl groups. characterized in that

In addition, the solvent of the present invention is characterized in that it comprises at least one selected from sophorone, isetate, cyclohexanone, xylene, xylene, cellosolvo, acetate, toluene and methyl ethyl ketone.

In addition, the coating composition of the present invention comprises 1 to 50% by weight of polytetrafluoroethylene, 1 to 20% by weight of low molecular weight polytetrafluoroethylene, 1 to 20% by weight of powdered polytetrafluoroethylene, 0.0001 to 60% by weight of additives. It is characterized in that it contains %.

In addition, the coating composition of the present invention further comprises a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, a surfactant, a pigment, a curing accelerator, and a middle agent including the remaining amount of the additive. do it with

In addition, the coating composition of the present invention is an aqueous polyurethane resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant, additive and acrylic resin, modified latex resin, It is characterized in that it further comprises a coating agent comprising at least one composition selected from hybrid rubber, silicone resin, and urethane-modified polyester.

In addition, the method of manufacturing a coating structure of a concrete structure and a steel structure using the fluororesin component of the present invention is a first method of preparing polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, and additives. Preparation step and the first mixture preparation step of preparing a first mixture by mixing polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, and additives prepared in the first preparation step and fluorine-containing epoxy A second preparation step of preparing a resin, powdered polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and a curing accelerator, and a fluorine-containing epoxy resin, powdered polytetrafluoroethylene, monobasic ammonium phosphate in the first mixture , surfactant, pigment, and curing accelerator are mixed to prepare the intermediate agent, and water-based polyurethane resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, A third preparation step of preparing at least one composition selected from antioxidants and acrylic resins, modified latex resins, hybrid rubbers, silicone resins, and urethane-modified polyesters, and aqueous polyurethane resins, powder polytetrafluoro to the first mixture At least one composition selected from ethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant and acrylic resin, modified latex resin, hybrid rubber, silicone resin, and urethane-modified polyester is mixed to apply the top coat It is characterized in that it is configured to include a topcoat preparation step of manufacturing the agent (60).

In addition, the first mixture preparation step of the present invention is characterized in that while heating at 20 to 50 degrees, stirring at a low speed for 1 to 5 hours at a speed of 20 to 150 rpm.

In addition, the coating agent manufacturing step of the present invention is characterized in that the stirring at a low speed of 10 to 60 minutes at a speed of 100 to 200 rpm at 20 to 25 degrees.

In addition, the surface coating method using the coating composition of the concrete structure and steel structure using the fluororesin component of the present invention repairs the surface of the concrete structure and the steel structure, washes foreign substances, and surface treatment to apply the coating composition. After the step and the surface treatment step, the first drying step of drying the concrete structure and the steel structure and after the first drying step, polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, additives Curing the intermediate agent layer by applying a middle agent composed of mixing a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator to a first mixture prepared by mixing After the second drying step of drying the intermediate layer and the second drying step, polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene, and an additive are mixed to a first mixture prepared by mixing aqueous poly Among urethane resins, powdered polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactants, pigments, curing accelerators, ultraviolet absorbers, antioxidants, additives and acrylic resins, modified latex resins, hybrid rubbers, silicone resins, and urethane-modified polyesters It is characterized in that it comprises a top coat layer curing step of curing the top coat layer by applying a top coat composed of mixing at least one selected composition, and a third drying step of drying the top coat layer.

The coating composition of a concrete structure and a steel structure using the fluororesin component according to the present invention presented as described above, a manufacturing method thereof, and a surface coating method using the same are polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene Any one or a plurality of additives selected from loethylene, acrylic resin, silicone resin, dispersant, light stabilizer, antifoaming agent and solvent, intermediate agent and topcoating agent, pollutants in the air, snow, rain, infrared rays, ultraviolet rays, temperature There is an effect of preventing condensation, etc. due to the difference.

In addition, the intermediate and top coaters have an effect of facilitating the bonding of paints and pigments with a high solid content ratio, thereby allowing various colors to be mixed with a small amount.

1 is a flowchart sequentially showing a method for manufacturing a coating composition for a concrete structure and a steel structure using a fluororesin component according to a preferred embodiment of the present invention.
2 is a flowchart sequentially showing a surface coating method using a coating composition for a concrete structure and a steel structure using a fluororesin component according to a preferred embodiment of the present invention.

The present invention describes in more detail a coating composition for a concrete structure and a steel structure using a fluororesin component, a manufacturing method thereof, and a surface coating method using the same. However, the embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

Therefore, the present invention is not limited to the embodiments presented below and may be embodied in other forms, and the embodiments presented below are only described to clarify the spirit of the present invention, and the present invention is not limited thereto.

At this time, unless there are other definitions in the technical terms and scientific terms used, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and in the following description, the subject matter of the present invention may be unnecessarily obscured. Descriptions of possible known functions and configurations will be omitted.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

Hereinafter, a coating composition for a concrete structure and a steel structure according to a preferred embodiment of the present invention, a manufacturing method thereof, and a surface coating method using the same will be described in detail as follows.

Polytetrafluoroethylene (10), which is a component of the present invention, is

An aqueous dispersion of fine particles in a liquid state in which polytetrafluoroethylene is dispersed in water can be used.

The polytetrafluoroethylene 10 may be included in an amount of 1 to 50% by weight based on the total weight of the coating composition. If it is less than 1% by weight, heat resistance and chemical resistance may be reduced, and if it exceeds 50% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range. More preferably, it is good to contain 5 to 30% by weight.

The polytetrafluoroethylene 10 has a structural formula represented by the following Chemical Formula 1, and is a non-flammable fluororesin belonging to an organic polymer series consisting of large molecules made by chemically bonding small units in the form of chains or nets.

Polytetrafluoroethylene (10) has high chemical resistance and corrosion resistance, has a very low coefficient of friction, and is stable at high temperatures due to strong heat resistance. Moreover, since it is a porous structure, it is excellent also in permeability, flexibility, flexibility, collection property of microparticles|fine-particles, filterability, etc.

[Formula 1]

(In Formula 1, n is an integer greater than or equal to 1.)

Low molecular weight polytetrafluoroethylene (20), which is a component of the present invention, is

It is preferable to use a polytetrafluoroethylene (10) having a lower molecular weight than the polytetrafluoroethylene (10) and having an average molecular weight of 10,000 to 100,000 g/mol. When the molecular weight is less than 10,000 g/mol, lubricity may increase and frictional force may increase, and if it exceeds 100,000 g/mol, the viscosity increases and aggregation tends to occur, and workability and productivity may deteriorate. It is preferable to use low molecular weight polytetrafluoroethylene (20) having an average molecular weight in

The low molecular weight polytetrafluoroethylene (20) is preferably included in an amount of 1 to 30% by weight based on the total weight of the coating composition. If it is less than 1% by weight, lubricity may deteriorate due to reduced lubricity, and if it exceeds 30% by weight, it is preferable to use within the above range because the solid content may increase and it may be difficult to mix uniformly. Do. More preferably, it is good to contain 1 to 5% by weight.

Powder polytetrafluoroethylene (30) which is a component of the present invention is

Heat resistance, flame retardancy, chemical resistance, lubricity, non-adhesive properties, electrical properties are better than the polytetrafluoroethylene (10) and low molecular weight polytetrafluoroethylene (20), and since the melt viscosity is very high, after compressing the powder , a product formed by heating (baking) above the melting point and fusion-bonding the powders can be used.

The powder polytetrafluoroethylene 30 is preferably included in an amount of 1 to 20 wt% based on the total weight of the coating composition. If it is less than 1% by weight, the content of the solid content is reduced and it is difficult to uniformly mix when mixed with the pigment thereafter, and if it exceeds 20% by weight, the content of the solid content increases and it is difficult to mix uniformly. It is preferable to use it internally. More preferably, it is good to contain 1 to 10% by weight.

In addition, it is preferable to use the powder polytetrafluoroethylene 30 having an average particle diameter of 100 to 2000 μm (micrometer). If the average particle diameter is less than 100 μm, it is difficult to manufacture, and workability may be deteriorated because the cohesive force between the particles is strong. If it exceeds 2000 μm, the fluidity of the powder is lowered and thereafter, the polytetrafluoroethylene (10 ), it is preferable to use a particle having an average particle diameter within the above range because a problem of uniform mixing may occur when mixing with the low molecular weight polytetrafluoroethylene (20). More preferably, it is good to use 200 to 1000 μm.

The additive 40, which is a component of the present invention, is

An acrylic resin, a silicone resin, a dispersant, a light stabilizer, an antifoaming agent, and a solvent may be selected from among one or more.

The acrylic resin is an acrylic acid ester-based monomer, such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, and 2-ethylhexyl methacrylate. , benzyl methacrylate, phenyl methacrylate, stearic methacrylate, cyclohexyl methacrylate, and one or more monomers selected from the group consisting of lauryl methacrylate may be combined.

The acrylic resin may be used in an amount of 0.0001 to 60% by weight. If it is less than 0.0001% by weight, problems such as cracking and reduction due to absorption may occur when the humidity is high, and if it exceeds 60% by weight, there is no effect change due to excessive input and it is uneconomical, so it is preferable to use it within the above range Do. More preferably, it is good to use 8 to 50% by weight.

The silicone resin is a thermosetting synthetic resin made by polymerization of an organic derivative of silicone, also called a silicone resin, and its molecular structure is based on silicon in the form of a siloxane bond in which silicon and oxygen are alternated, and a methyl group, a phenyl group, and a hydroxyl group on the silicon. It is a thermosetting synthetic resin to which etc. have been added. It has good electrical insulation, heat resistance, cold resistance, moisture resistance, aging resistance, non-volatility, and chemical resistance, so it can be used in various ways as electrical insulators, waterproofing agents, paints, adhesives, defoamers, and foam removers.

The silicone resin may be used in an amount of 0.0001 to 60% by weight. If it is less than 0.0001% by weight, water repellency, chemical resistance, heat resistance, etc. may be lowered, and if it exceeds 60% by weight, there is no effect change due to excessive input and it is uneconomical, so it is preferable to use it within the above range. More preferably, it is good to use 2 to 20% by weight.

In addition, as for the synthetic resins such as the acrylic resin and the silicone resin, a melamine resin, an alkyd resin, a vinyl chloride resin, a vinyl acetate resin, a urethane resin, an epoxy resin, a polyester resin, etc. may be used. The synthetic resins may be used alone or in combination.

The dispersant includes silicone-based emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid type, etc., but the most suitable one is appropriately selected in combination with the oil-based solvent to be used. In particular, in order to exist at the interface between the oil solvent and air rather than the interface between the oil solvent and the polytetrafluoroethylene micropowder, it is preferable to use, for example, a hydrophilic or water-soluble silicone antifoaming agent, but without being limited thereto, it will be available

The dispersant may be used in an amount of 0.0001 to 60% by weight. If it is less than 0.0001% by weight, dispersion is reduced and a uniform addition effect cannot be obtained, and if it exceeds 60% by weight, there is no effect change due to excessive input, so it is preferable to use within the above range because it is uneconomical. More preferably, it is good to use 0.1 to 2% by weight.

The light stabilizer is used for the purpose of improving weather resistance by inhibiting changes in physical properties (eg, decomposition) of a concrete structure or a steel structure according to a photochemical reaction or absorption of ultraviolet rays, and may be a hindered amine type. As an example, EVERSORB-90 (Everlight Chemical), Eversorb-95 (Everlight Chemical), etc. may be used, but is not limited thereto.

The light stabilizer may be used in an amount of 0.0001 to 60% by weight. If it is less than 0.0001% by weight, light resistance and weather resistance may be reduced, and if it exceeds 60% by weight, initial discoloration may occur due to excessive input, so it is preferable to use within the above range. More preferably, it is good to use 0.01 to 1% by weight.

The antifoaming agent is used for the purpose of suppressing the occurrence of bubbles, at least one selected from modified silicones, higher alcohols, minerals, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica and perfluoroalkyl group antifoaming agents It may be composed of

Modified silicones are materials made by attaching silicone components to a reactor of polyurethane, and refer to silicones that have both physical and chemical advantages of urethane and silicone. That is, paintability, non-shrinkability, non-staining properties, weather and temperature change are small, and UV resistance is good.

Higher alcohols refer to substances with 6 or more carbon atoms and hydroxyl groups in the molecule. When the carbon number is 6 to 10, it exists in a liquid state at room temperature and can be used for increasing the viscosity and stability of the formulation.

Higher fatty acid glycerite refers to an ester-bonded compound of fatty acid and glycerol, and has a structure bonded to a hydroxyl functional group. It has the property of absorbing moisture in the air, and can be used as an emulsifier and an antifoaming agent.

Dimethyl polysiloxane is a silicone-based organic polymer that has strong viscosity, chemical resistance, stability against humidity and temperature changes, inertness, non-toxicity, and non-flammability, so it can be used as a lubricant, heat-resisting agent, surfactant, and defoaming agent.

Polypropylene glycol is a polymer of propylene glycol, which is a colorless, transparent liquid with a slight odor. It is not volatile, stable to heat and sunlight, but is flammable (flash point 104 degrees). It can be used as a solvent for dissolving pigments, essential oils, and resins and mixing them with water again. It can be used as an emulsification limiting agent, preservative, air sterilization, etc.

Hydrophobic silica is a hydrophobic wet method synthetic silica whose surface is hydrophobized with silicone oil, and is used as an antifoaming agent, a matting agent for paints, and an antiblocking agent for films. When used for paint, water repellency can be improved and antifouling, alkali resistance, chemical resistance, and scratch resistance can be improved.

The perfluoroalkyl group antifoaming agent is one in which all or most of the hydrogen atoms in the alkyl group are substituted with fluorine atoms, and the efficiency of the surface properties of the polymer is good, and the water repellency and oil repellency can be improved.

The antifoaming agent may be used in an amount of 0.0001 to 60% by weight. If it is 0.0001% by weight, it is difficult to suppress the occurrence of bubbles, and when it exceeds 60% by weight, there is no effect change due to excessive input, so it is preferable to use within the above range because it is uneconomical. More preferably, it is good to use 0.001 to 1% by weight.

The solvent is at least one selected from isophorone, cyclohexanone, xylene, cellosolve, acetate, toluene, and methylethylketone. It may be composed of

The isophorone is an unsaturated ketone, a colorless liquid with a characteristic odor like peppermint. Soluble in esters, ketones, ethers, aromatic hydrocarbons, aliphatic hydrocarbons, etc.

The cyclohexanone is composed of 6-carbon cyclic molecules with ketone functional groups and is a colorless liquid with an acetone-like odor. It is well soluble in organic solvents such as ethanol and ether. It is used as a solvent in paints, inks, synthetic resins, solvents and diluents for synthetic rubber.

The xylene is called xylene, and is an aromatic hydrocarbon having a structure in which two methyl groups are bonded to a benzene ring. It is a colorless liquid with a sweet odor and is highly flammable. It is well soluble in organic solvents such as ethanol and ether. Because of its high solubility, xylon itself is used as a solvent for paints, inks, synthetic resins, and synthetic rubber solvents and diluents.

The cellosolvo has an alcohol group and an ethyl group, so it approaches the solubility of the functional groups, so it is used as a wide range of solvents in the manufacturing process of chemical industrial products such as dyes, synthetic detergents, organic pigments, pharmaceuticals, pesticides, fragrances, insect repellents, preservatives, and inks.

The acetate is a colorless, transparent, flammable liquid. It is well soluble in organic solvents such as alcohol and ether. It is used as a solvent in paints, inks, synthetic resins, etc. because of its strong ability to dissolve various organic substances.

The toluene is also called toluol, methylbenzene, and phenylmethane, has a structure in which a methyl group is substituted on a benzene ring, and is a colorless, insoluble liquid with a thinner odor. It is soluble in container solvents such as ethanol, chloroform, acetone, and ether. It is used as a solvent in paints, coatings, adhesives, and inks.

The methyl ethyl ketone is also called 2-butanone and butanone, and is a colorless, transparent, sweet odor and highly volatile liquid. It is used as a solvent in paint, rubber, resin, nitriding surface coating and vinyl film processes.

The solvent is acetone, methylcellusolve, ethylcellusolve, butylcellusolve, ethylacetate, propylacetate, butylacetate, ethylene glycol methyl Ether (ethylene glycol methyl ether), diethylene glycol methyl ether (diethylene glycol methyl ether), butylene glycol methyl ether (Butylene glycol methyl ether), propylene glycol methyl ether (propylene glycol methyl ether), dipropylene glycol methyl ether (dipropylene) glycol methyl ether), but the scope of the present invention is not limited to these solvents, and various other solvents may be used.

In addition, the additive 40 may be configured to further include a reaction catalyst and a wetting additive.

The reaction catalyst serves to improve the reaction rate, and the content thereof is preferably contained in an amount of 0.1 to 0.3% by weight based on the total weight of the coating composition. If it is less than 0.1% by weight, the reaction rate may be reduced, and if it is more than 0.3% by weight, the pot life may be shortened and a problem of reducing workability may occur, so it is preferable to be included within the above range.

The wetting additive is a polyether siloxane-based additive, and serves to improve wettability and leveling properties of the coating film surface (the degree to which the coating becomes uniform) during coating, and the content thereof is 0.1 to 0.3% by weight based on the total weight of the coating composition. preferably included. When it is less than 0.1% by weight, wettability and leveling properties cannot be improved, and when it exceeds 0.3% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The intermediate agent 50, which is a component of the present invention, is

Any one selected from the polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30) and acrylic resin, silicone resin, dispersant, light stabilizer, defoaming agent and solvent Or it may be configured to further include a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, a surfactant, a pigment, and a curing accelerator in the antifouling fluororesin made by mixing a plurality of additives 40 .

The antifouling fluororesin is strong in direct exposure to ultraviolet and infrared rays, and has a water repellent function from moisture such as rain or snow, and is preferably added in an amount of 10 to 40% by weight based on the total weight of the intermediate agent. If it is less than 10% by weight, deformation may occur or water repellency may be reduced by ultraviolet and infrared rays, and if it exceeds 40% by weight, it is not economical because there is no change in the effect due to excessive input It is preferable to use it within the above range. .

The fluorine-containing epoxy resin is to increase the surface protection strength of the antifouling fluororesin, and is preferably added in an amount of 45 to 85% by weight based on the total weight of the intermediate agent. If it is less than 45% by weight, a decrease in strength may occur, and if it exceeds 85% by weight, it is preferable to use within the above range because there is no effect change due to excessive input and is uneconomical.

The powder polytetrafluoroethylene serves as a tetrafluoroethylene resin and a fluororesin at the same time, and is preferably added in an amount of 1 to 10% by weight based on the total weight of the intermediate agent. If it is less than 1% by weight, the resistance to chemicals is lowered or the water repellent function is lowered, and deformation or damage may occur due to rain or snow. If it exceeds 10% by weight, there is no change in the effect due to excessive input, which is uneconomical Since it is an enemy, it is preferable to use it within the above range.

The monobasic ammonium phosphate ((NH ₄ )H ₂ PO ₄ ) is a white crystal or a white crystalline powder, and when added to a coating composition, it gives a flame retardant function and a heat insulating function, so that the surface of concrete structures, steel structures, etc. It can suppress the occurrence of dew condensation even if the space temperature of the contact surface is different during application.

In addition, the monobasic ammonium phosphate may help to be easily mixed when mixed with a pigment in order to impart color to the coating composition after serving as a solid content.

The monobasic ammonium phosphate is preferably added in an amount of 1 to 5% by weight based on the total weight of the intermediate agent. If it is less than 1% by weight, a decrease in flame retardancy may occur, and if it exceeds 5% by weight, it is preferable to use within the above range because there is no effect change due to excessive input and is uneconomical.

The surfactant acts as a dispersant to uniformly mix the solid particles in the liquid, and is preferably added in an amount of 0.1 to 2% by weight based on the total weight of the intermediate agent. If it is less than 0.1% by weight, it is difficult to uniformly mix and workability may deteriorate, and if it exceeds 2% by weight, it is preferable to use within the above range because it is uneconomical because there is no effect change due to excessive input.

The pigment is a pigment that expresses color in a material, and is a fine powder solid that does not dissolve in water or oil, and may be used by mixing it with a paint. For example, calcium carbonate, chromium sulfur, zinc oxide, zinc sulfur, cadmium sulfur, lead, chromium oxide, and the like.

The pigment is preferably added in an amount of 1 to 5% by weight based on the total weight of the intermediate agent. If it is less than 1% by weight, the color may not appear clearly, and if it exceeds 5% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The curing accelerator is an admixture used to accelerate the curing rate, for example, calcium chloride may be used. However, the present invention is not limited thereto.

The curing accelerator is preferably added in an amount of 0.01 to 1% by weight based on the total weight of the intermediate agent composition. When it is less than 0.01% by weight, the curing rate cannot be accelerated, and when it exceeds 1% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The topcoat 60, which is a component of the present invention, is

Any one selected from the polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30) and acrylic resin, silicone resin, dispersant, light stabilizer, defoaming agent and solvent Alternatively, a first mixture (fluororesin) made by mixing a plurality of additives 40 is added to an aqueous polyurethane resin, powdered polytetrafluoroethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant and at least one composition selected from an acrylic resin, a modified latex resin, a hybrid rubber, a silicone resin, and a urethane-modified polyester.

The first mixture is strong in direct exposure to ultraviolet and infrared rays, and has a water repellent function from moisture such as rain or snow, and is preferably added in an amount of 10 to 50% by weight based on the total weight of the topcoat composition. If it is less than 10% by weight, deformation may occur or water repellency may be reduced by ultraviolet and infrared rays, and if it exceeds 40% by weight, it is not economical because there is no change in the effect due to excessive input It is preferable to use it within the above range. .

The water-based polyurethane resin has excellent electrical properties, has good durability, and has a fast drying time, and is preferably added in an amount of 40 to 80% by weight based on the total weight of the topcoating agent. If it is less than 40% by weight, problems such as a decrease in durability and an increase in drying time may occur, and if it exceeds 80% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The hydrophilic surfactant acts as a dispersant to uniformly mix the solid particles in the liquid, and is preferably added in an amount of 0.1 to 2% by weight based on the total weight of the topcoating agent. If it is less than 0.1% by weight, it is difficult to uniformly mix and workability may deteriorate, and if it exceeds 2% by weight, it is preferable to use within the above range because it is uneconomical because there is no effect change due to excessive input.

The pigment is a pigment that expresses color in a material, and is a fine powder solid that does not dissolve in water or oil, and may be used by mixing it with a paint. For example, calcium carbonate, chromium sulfur, zinc oxide, zinc sulfur, cadmium sulfur, lead, chromium oxide, and the like.

The pigment is preferably added in an amount of 1 to 5% by weight based on the total weight of the topcoat. If it is less than 1% by weight, the color may not appear clearly, and if it exceeds 5% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The curing accelerator is an admixture used to accelerate the curing rate, for example, calcium chloride may be used. However, the present invention is not limited thereto.

The curing accelerator is preferably added in an amount of 0.01 to 1% by weight based on the total weight of the topcoat composition. When it is less than 0.01% by weight, the curing rate cannot be accelerated, and when it exceeds 1% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The ultraviolet absorber absorbs harmful ultraviolet wavelengths and emits heat or other stable form for the purpose of maintaining gloss and color of the topcoat, and it is preferable to add 0.01 to 1% by weight based on the total weight of the topcoat. Do. If it is less than 0.01% by weight, gloss and color retention may be reduced, and if it exceeds 1% by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

The antioxidant is to prevent oxidation by oxygen to prevent deterioration of the quality of the topcoat, and is preferably added in an amount of 0.01 to 1% by weight based on the total weight of the topcoat. When it is less than 0.01% by weight, it is preferable to use within the above range because it is uneconomical because there is no change in effect due to excessive input and when it exceeds 1% by weight, it is preferable to use within the above range. .

The acrylic resin is an acrylic acid ester-based monomer, such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, and 2-ethylhexyl methacrylate. , benzyl methacrylate, phenyl methacrylate, stearic methacrylate, cyclohexyl methacrylate, and one or more monomers selected from the group consisting of lauryl methacrylate may be combined.

The acrylic resin may be used in an amount of 5 to 20% by weight based on the total weight of the topcoat. If it is less than 5% by weight, when the humidity is high, problems such as cracking and deterioration due to absorption may occur, and if it exceeds 20% by weight, there is no effect change due to excessive input and it is uneconomical, so it is preferable to use it within the above range. Do.

The silicone resin is a thermosetting synthetic resin made by polymerization of an organic derivative of silicone, also called a silicone resin, and its molecular structure is based on silicon in the form of a siloxane bond in which silicon and oxygen are alternated, and a methyl group, a phenyl group, and a hydroxyl group on the silicon. It is a thermosetting synthetic resin to which etc. have been added. It has good electrical insulation, heat resistance, cold resistance, moisture resistance, aging resistance, non-volatility, and chemical resistance, so it can be used in various ways as electrical insulators, waterproofing agents, paints, adhesives, defoamers, and foam removers.

The silicone resin may be used in an amount of 5 to 20% by weight based on the total weight of the topcoat. If it is less than 5% by weight, water repellency, chemical resistance, heat resistance, etc. may be lowered, and if it exceeds 20% by weight, there is no effect change due to excessive input and it is uneconomical, so it is preferable to use it within the above range.

In addition, as for the synthetic resins such as the acrylic resin and the silicone resin, a melamine resin, an alkyd resin, a vinyl chloride resin, a vinyl acetate resin, a urethane resin, an epoxy resin, a polyester resin, etc. may be used. The synthetic resins may be used alone or in combination.

The modified latex resin is for strengthening the adhesion of the topcoat, and may be used in an amount of 5 to 20 wt% based on the total weight of the topcoat. If it is less than 5% by weight, a decrease in adhesive strength may occur, which may cause quality deterioration, and if it exceeds 20% by weight, there is no effect change due to excessive input, so it is preferable to use within the above range because it is uneconomical.

The hybrid rubber is intended to improve durability and water resistance to reduce adhesion failure due to discoloration, aging, and wetting by UV rays, and may be used in an amount of 5 to 20% by weight based on the total weight of the topcoat. If it is less than 5% by weight, durability and durability may be lowered, and discoloration, aging, and adhesion failure may occur due to UV rays and wetness. If it exceeds 20% by weight, there is no effect change due to excessive input and it is uneconomical because it is within the above range. It is preferable to use

The urethane-modified polyester is to enhance water resistance, hardness, chipping resistance, and adhesion, and may be used in an amount of 5 to 20 wt % based on the total weight of the topcoat. If it is less than 5% by weight, water resistance, hardness, and adhesion may be lowered, and damage due to UV rays and wetness may occur. If it exceeds 20% by weight, there is no effect change due to excessive input, so use within the above range because it is uneconomical. It is preferable to do

Hereinafter, as shown in FIG. 1, the manufacturing method for preparing the coating composition of the present invention as described above will be described in detail as follows.

As shown in Figure 1, the coating composition manufacturing method of the present invention is,

The first preparation step (S10) and the first preparation step of preparing polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), and additive (40) The first to prepare a first mixture by mixing the polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), and additive (40) prepared in (S10) The mixture preparation step (S20) and the second preparation step (S30) of preparing the fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator, and the fluorine-containing epoxy in the first mixture The intermediate agent manufacturing step (S40) of preparing the intermediate agent 50 by mixing resin, powder polytetrafluoroethylene, monoammonium phosphate, surfactant, pigment, and curing accelerator (S40) and aqueous polyurethane resin, powder polytetrafluoro Ethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant and at least one composition selected from acrylic resin, modified latex resin, hybrid rubber, silicone resin, urethane-modified polyester. 3 Preparation step (S50) and aqueous polyurethane resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, UV absorber, antioxidant and acrylic resin, modified latex resin in the first mixture , hybrid rubber, silicone resin, and at least one composition selected from urethane-modified polyester may be mixed to prepare a topcoat 60 by mixing the topcoat agent (S60).

The first preparation step (S10) is 1 to 50% by weight of the polytetrafluoroethylene (10), 1 to 20% by weight of the low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene, based on the total weight of the coating composition 1 to 20% by weight of roethylene (30) and 0.001 to 60% by weight of the additive (40) are prepared.

At this time, the polytetrafluoroethylene 10 is polyfron-D (Dispersion), and an aqueous dispersion state in which polytetrafluoroethylene is dispersed in water to maintain a liquid state is used.

The first mixture preparation step (S20) includes 10 to 50% by weight of polytetrafluoroethylene (10) prepared in the first preparation step (S10), 1 to 20% by weight of low molecular weight polytetrafluoroethylene (20), A first mixture is prepared by mixing 1 to 20% by weight of powdered polytetrafluoroethylene (30) and 0.001 to 60% by weight of the additive (40).

At this time, the first mixture preparation step (S20) is stirred at a low speed for 1 to 5 hours at a speed of 20 to 150 rpm while heating at 20 to 50 degrees (℃).

In the first mixture manufacturing step (S20), when heated to less than 20 degrees, it is difficult to uniformly mix at a low temperature, and when heated to more than 50 degrees, other mixtures other than the first mixture may be formed by the high temperature. Therefore, it is preferable to heat to a temperature within the above range. More preferably, it is good to heat to a temperature of 30 to 40 degrees.

In the first mixture manufacturing step (S20), when stirring at a speed of less than 20 rpm, a problem of lowering productivity may occur because the mixing speed takes a long time, and when stirring at a speed exceeding 150 rpm, each It may be difficult to achieve resistance to ultraviolet and infrared rays and moisture-proof and water-repellent functions against moisture such as rain or snow because the compositions of the composition are sufficiently dispersed and mixed uniformly. More preferably, it is good to stir at a speed of 50 to 100 rpm.

In the first mixture manufacturing step (S20), when stirring for less than 1 hour, the first mixture may not be mixed properly, and when stirring for more than 5 hours, the first mixture does not change compared to the mixing time Therefore, it is preferable to stir for a time within the above range because a problem may occur that only the working time becomes longer. More preferably, it is good to stir for 1 to 2 hours.

In the second preparation step (S30), 10 to 40% by weight of the first mixture mixed in the first mixture preparation step, 45 to 85% by weight of the fluorine-containing epoxy resin, powder polytetrafluoroethylene with respect to the total weight of the intermediate agent composition 1 to 10% by weight, 1 to 5% by weight of ammonium phosphate monobasic, 0.1 to 2% by weight of a surfactant, 1 to 5% by weight of a pigment, and 0.01 to 1% by weight of a curing accelerator are prepared.

The intermediate agent preparation step (S40) is 10 to 40% by weight of the first mixture prepared in the first mixture preparation step (S10), 45 to 85% by weight of a fluorine-containing epoxy resin, 1 to 10% by weight of polytetrafluoroethylene powder %, 1 to 5% by weight of ammonium phosphate monobasic, 0.1 to 2% by weight of a surfactant, 1 to 5% by weight of a pigment, and 0.01 to 1% by weight of a curing accelerator to prepare a middle agent (50).

At this time, the intermediate agent preparation step (S40) is stirred at a low speed for 1 to 5 hours at a speed of 20 to 150 rpm while heating at 20 to 50 degrees (℃).

In the intermediate agent manufacturing step (S40), when heated to less than 20 degrees, it is difficult to uniformly mix at a low temperature, and when heated to more than 50 degrees, a mixture other than the first mixture may be formed by the high temperature. Therefore, it is preferable to heat to a temperature within the above range. More preferably, it is good to heat to a temperature of 30 to 40 degrees.

In the intermediate agent preparation step (S40), when stirring at a speed of less than 20 rpm, a problem of lowering productivity may occur because the mixing speed takes a long time, and when stirring at a speed exceeding 150 rpm, each While the compositions are sufficiently dispersed, it is difficult to uniformly mix, so it may be difficult to achieve resistance to ultraviolet and infrared rays and moisture-proof and water-repellent functions against moisture such as rain or snow. More preferably, it is good to stir at a speed of 50 to 100 rpm.

In the intermediate agent preparation step (S40), when stirring for less than 1 hour, the first mixture may not be mixed properly, and when stirring for more than 5 hours, the first mixture does not change compared to the mixing time. Since a problem may occur that only the working time becomes longer, it is preferable to stir for a time within the above range. More preferably, it is good to stir for 1 to 2 hours.

The third preparation step (S50) is 10 to 50% by weight of the first mixture prepared in the first mixture preparation step (S10), 40 to 80% by weight of an aqueous polyurethane resin, powder polytetrafluoro, based on the total weight of the topcoating agent 1 to 10% by weight of roethylene, 1 to 5% by weight of monoammonium phosphate, 0.1 to 2% by weight of a hydrophilic surfactant, 1 to 5% by weight of a pigment, 0.01 to 1% by weight of a curing accelerator, 0.01 to 1% by weight of a UV absorber, Antioxidant 0.01 to 1% by weight and 5 to 20% by weight of at least one composition selected from acrylic resin, modified latex resin, hybrid rubber, silicone resin, and urethane-modified polyester are prepared.

The topcoat preparation step (S60) is 10 to 50% by weight of the first mixture prepared in the first mixture preparation step (S10), 40 to 80% by weight of an aqueous polyurethane resin, 1 to 10% by weight of powder polytetrafluoroethylene %, 1 to 5% by weight of monoammonium phosphate, 0.1 to 2% by weight of hydrophilic surfactant, 1 to 5% by weight of pigment, 0.01 to 1% by weight of curing accelerator, 0.01 to 1% by weight of ultraviolet absorber, 0.01 to 1% by weight of antioxidant % and 5 to 20 wt% of at least one composition selected from acrylic resin, modified latex resin, hybrid rubber, silicone resin, and urethane-modified polyester.

At this time, the top coat preparation step (S60) is stirred at a low speed of 10 to 60 minutes at a speed of 100 to 200 rpm at 20 to 25 degrees.

In the topcoat preparation step (S60), when heating to less than 20 degrees, it is difficult to uniformly mix at a low temperature, and when heating exceeding 25 degrees, a mixture other than the topcoat 60 is formed by the high temperature. Therefore, it is preferable to heat to a temperature within the above range.

In the topcoat preparation step (S60), when stirring at a speed of less than 100 rpm, a problem of lowering productivity may occur because the mixing speed takes a long time, and when stirring at a speed exceeding 200 rpm, each While the compositions are sufficiently dispersed, it is difficult to uniformly mix, so it may be difficult to achieve resistance to ultraviolet and infrared rays and moisture-proof and water-repellent functions against moisture such as rain or snow. More preferably, it is good to stir at a speed of 130 to 170 rpm.

In the intermediate agent preparation step (S40), when stirring for less than 10 minutes, the first mixture may not be mixed properly, and when stirring for more than 60 minutes, the first mixture does not change compared to the mixing time. Since a problem may occur that only the working time becomes longer, it is preferable to stir for a time within the above range. More preferably, it is good to stir for 20 to 40 minutes.

Hereinafter, as shown in FIG. 2, a detailed look at the surface coating method using the coating composition of the present invention as described above is as follows.

As shown in Figure 2, the surface coating method using the coating composition of the present invention is a surface treatment step (S70) of repairing the surface of a concrete structure and a steel structure and cleaning the foreign material to apply the coating composition. After the surface treatment step (S40), after the first drying step (S80) of drying the concrete structure and the steel structure and the first drying step (S50), polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), additive (40) to a first mixture prepared by mixing fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, curing After the step (S90) of curing the intermediate layer by applying the intermediate agent 50 composed of mixing the accelerator (S90) and the second drying step (S100) and the second drying step (S100) of drying the intermediate layer (S100), polytetrafluoro In a first mixture prepared by mixing roethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), and an additive (40), an aqueous polyurethane resin, powder polytetrafluoro At least one composition selected from ethylene, monoammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant, additive, and acrylic resin, modified latex resin, hybrid rubber, silicone resin, and urethane-modified polyester is mixed. It may be configured to include a topcoat layer curing step (S110) of curing the topcoat layer by applying the configured topcoat 60 and a third drying step (S120) of drying the topcoat layer.

In the surface treatment step (S70), the surface of the concrete structure and the steel structure, that is, the surface is treated so that the coating composition can be applied by repairing scratches, damage, etc. and cleaning foreign substances.

In the first drying step (S80), after the surface treatment step (S70), the surfaces of the concrete structure and the steel structure are dried.

The intermediate agent layer curing step (S90) is after the first drying step (S80) polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), additives ( 40), a fluorine-containing epoxy resin, powdered polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator (50) is applied to a thickness of 0.1 to 6 mm and cured.

In addition, it is preferable to apply the intermediate agent 50 to a thickness of 0.1 to 6 mm. If it is less than 0.1 mm thick, it is applied thinly, so that the flame retardant function of the intermediate agent is lowered, so that dew condensation may occur due to the temperature difference after application. If the thickness exceeds 6mm, it is preferable to apply to a thickness within the above range because a problem of increasing the working time may occur because it is applied thickly and the drying time is long.

The second drying step (S100) is dried for 1 to 3 hours so that the intermediate agent layer can be dried.

The topcoat layer curing step (S110) is after the second drying step (S100), polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), additives ( 40), aqueous polyurethane resin, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant, additive and acrylic resin, modified latex resin, hybrid rubber, silicone resin, A top coat 60 composed of mixing at least one composition selected from urethane-modified polyester is applied to a thickness of 0.1 to 6 mm and cured.

In addition, it is preferable to apply the top coat 60 to a thickness of 0.1 to 6 mm thick, but if it is less than 0.1 mm thick, it is applied thinly so that the water repellent function of the top coat, aging by infrared ultraviolet rays, and the discoloration prevention function are reduced. After application, damage may be caused by infrared rays, ultraviolet rays, snow, rainwater, etc., and if the thickness exceeds 6 mm, it is applied thickly and the drying time becomes longer. It is preferable to apply in thickness.

The third drying step (S120) is dried for 1 to 3 hours so that the intermediate agent layer can be dried.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the above Examples and Comparative Examples are provided to help the understanding of the present invention, and the present invention is not limited to the following Examples and Comparative Examples.

(Heat resistance measurement)

After standing for 30 minutes at -10 degrees (℃) and leaving for 30 minutes at 40 degrees (℃) alternately for 12 hours, it was measured whether bubbles or cracks occurred in places exceeding 13 mm from the edge (or reference).

Bubbles and cracks occurred on the surface: X

One of the bubbles or cracks occurred on the surface: △

There were no bubbles or cracks on the surface: ○

(Measurement of waterproof function)

After applying the intermediate agent (50) and the topcoating agent (60) to the surface of the concrete structure and the steel structure, water was sprayed for 1 hour, and then the appearance was visually determined.

Leaving water on the surface: X

A little water remains on the surface: △

No water on the surface: ○

(Measurement of weather resistance)

Discoloration, cracking, and peeling were visually determined after leaving the surface of concrete structures and steel structures outdoors for 100 hours, which can be affected by infrared and ultraviolet rays.

Discoloration, cracks, and peeling occurred on the surface: X

One or both of discoloration, cracking, or peeling occurred on the surface: △

No discoloration, cracking, or peeling occurred on the surface: ○

(Examples 1 to 5 and Comparative Example 1)

In the first mixture (hydrophilic fluororesin) prepared by mixing polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powdered polytetrafluoroethylene and additives in an aqueous dispersion state, fluorine-containing epoxy resin, powdered polytetrafluoro Ethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator were mixed to prepare an intermediate agent.

In addition, in the first mixture (hydrophilic fluororesin) prepared by mixing polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, powder polytetrafluoroethylene and additives in an aqueous dispersion state, an aqueous polyurethane resin, an acrylic resin, A topcoat was prepared by mixing silicone resin, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, and antioxidant.

In this case, Examples 1 to 3 include all of the first mixture, powder polytetrafluoroethylene, and monobasic ammonium phosphate, but the weight percent added is different, and Example 4 does not contain monobasic ammonium phosphate. , Example 5 is the state in which the first mixture (fluororesin), fluorine-containing epoxy resin, and powder polytetrafluoroethylene are not mixed, Comparative Example 1 is the first mixture (fluororesin), fluorine-containing epoxy resin, powder polytetra Fluoroethylene and monobasic ammonium phosphate were mixed under the same conditions except for a state in which they were not mixed to prepare a first mixture, an intermediate agent, and a topcoating agent, respectively, and were described in wt% added in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 first mixture 40 40 40 40 - - halfway Fluorine-containing epoxy resin 45 45 45 45 - - Powder polytetrafluoroethylene 0.5 5 5 5 - - monobasic ammonium phosphate 5 0.5 5 - 5 - Surfactants 0.1 0.1 0.1 0.1 0.1 0.1 pigment One One One One One One hardening accelerator 0.01 0.01 0.01 0.01 0.01 0.01 topcoat Water-based polyurethane resin 70 70 70 70 70 70 acrylic resin 5 5 5 5 5 5 silicone resin 5 5 5 5 5 5 Powder polytetrafluoroethylene 0.5 5 5 5 - - monobasic ammonium phosphate 5 0.5 5 - 5 - hydrophilic surfactant 0.1 0.1 0.1 0.1 0.1 0.1 pigment One One One One One One hardening accelerator 0.01 0.01 0.01 0.01 0.01 0.01 UV absorber 0.01 0.01 0.01 0.01 0.01 0.01 antioxidant 0.01 0.01 0.01 0.01 0.01 0.01

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 coolness ○ △ ○ X ○ X waterproof function △ ○ ○ ○ X X weather resistance ○ △ ○ X X X

As shown in Table 2, it was confirmed that the coating composition prepared according to the present invention had cold-heat property, waterproof function, and weather resistance. Specifically, in the case of Example 3 containing both powder polytetrafluoroethylene and monobasic ammonium phosphate in each of the first mixture (fluororesin), the intermediate agent, and the topcoating agent, it was found that the cold and heat resistance, waterproof function, and weather resistance were the best can

On the other hand, in the case of Examples 1 and 2, both powder polytetrafluoroethylene and monobasic ammonium phosphate are contained, but compared to Example 3, the powder polytetrafluoroethylene is mixed in a small weight %, so that the cooling and heat resistance, waterproof function, It can be confirmed that any one or a plurality of effects of weather resistance are small.

That is, the coating composition of the present invention is 1 to 10% by weight of powdered polytetrafluoroethylene, 1 to 5% by weight of ammonium monophosphate, and Example 3 containing both powdered polytetrafluoroethylene and monobasic ammonium phosphate. It can be seen that the cold-heat resistance, waterproof function, and weather resistance are good.

As mentioned above, although the present invention has been described with reference to the illustrated embodiment, it will be understood that this is merely an example, and that various modifications and equivalent embodiments are possible therefrom by those of ordinary skill in the art. Accordingly, the true protection scope of the present invention should be defined only by the appended claims.

10: polytetrafluoroethylene
20: low molecular weight polytetrafluoroethylene
30: powder polytetrafluoroethylene
40: additive
50: midway
60: topcoat

Claims (10)

polytetrafluoroethylene (10);
low molecular weight polytetrafluoroethylene (20);
powder polytetrafluoroethylene (30);
Any one or a plurality of additives 40 selected from acrylic resins, silicone resins, dispersants, light stabilizers, defoamers and solvents;
a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, a surfactant, a pigment, and an intermediate agent 50 including a curing accelerator;
A coating composition for concrete and steel structures using a fluororesin component, characterized in that it comprises a.
According to claim 1,
The antifoaming agent
Concrete and steel structure using a fluororesin component, characterized in that it comprises at least one selected from modified silicones, higher alcohols, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica, and perfluoroalkyl groups of coating composition.
According to claim 1,
The solvent is
Isophorone, acetate, cyclohexanone, xylene, cellosolve, toluene, and a coating composition for a concrete and steel structure using a fluororesin component, characterized in that it comprises at least one selected from methyl ethyl ketone.
According to claim 1,
The coating composition comprises 1 to 50% by weight of polytetrafluoroethylene, 1 to 20% by weight of low molecular weight polytetrafluoroethylene, 1 to 20% by weight of powdered polytetrafluoroethylene, and 0.0001 to 60% by weight of additives. A coating composition for concrete and steel structures using a fluororesin component as a feature.
delete According to claim 1,
The coating composition,
Among water-based polyurethane resins, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactants, pigments, curing accelerators, ultraviolet absorbers, antioxidants and acrylic resins, modified latex resins, hybrid rubbers, silicone resins, and urethane-modified polyesters Topcoat 60 comprising at least one selected composition;
Coating composition of concrete and steel structure using a fluororesin component, characterized in that it further comprises a.
[Claim 7] In the method for producing a coating composition for concrete and steel structures using the fluororesin component of any one of claims 1 to 4, 6,
A first preparation step (S10) of preparing polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), and an additive (40);
A first mixture by mixing polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), and additive (40) prepared in the first preparation step (S10) A first mixture preparation step (S20) of preparing a;
a second preparation step (S30) of preparing a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, a surfactant, a pigment, and a curing accelerator;
A middle agent manufacturing step (S40) of preparing a middle agent 50 by mixing a fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator in the first mixture;
Among water-based polyurethane resins, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactants, pigments, curing accelerators, ultraviolet absorbers, antioxidants and acrylic resins, modified latex resins, hybrid rubbers, silicone resins, and urethane-modified polyesters A third preparation step of preparing at least one composition selected (S50);
In the first mixture, aqueous polyurethane resin, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, ultraviolet absorber, antioxidant and acrylic resin, modified latex resin, hybrid rubber, silicone resin, A topcoat preparation step (S60) of preparing a topcoat 60 by mixing at least one composition selected from urethane-modified polyester;
A method of manufacturing a coating composition for concrete and steel structures using a fluororesin component, characterized in that it comprises a.
8. The method of claim 7,
The first mixture manufacturing step (S20) is
Method for producing a coating composition for concrete and steel structures using a fluororesin component, characterized in that stirring at a low speed for 1 to 5 hours at a speed of 20 to 150 rpm while heating at 20 to 50 degrees.
8. The method of claim 7,
The topcoat preparation step (S60) is
A method for producing a coating composition for concrete and steel structures using a fluororesin component, characterized in that the stirring is performed at a low speed of 10 to 60 minutes at a speed of 100 to 200 rpm at 20 to 25 degrees.
Surface treatment step (S70) of repairing the surface of the concrete structure and steel structure and cleaning the foreign material to apply the coating composition;
After the surface treatment step (S70), a first drying step (S80) of drying the concrete structure and the steel structure;
After the first drying step (S80), polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), the additive (40) prepared by mixing Curing the intermediate layer by applying the intermediate agent 50 composed of a mixture of fluorine-containing epoxy resin, powder polytetrafluoroethylene, monobasic ammonium phosphate, surfactant, pigment, and curing accelerator to 1 mixture (S90);
a second drying step of drying the intermediate layer (S100);
After the second drying step (S100), polytetrafluoroethylene (10), low molecular weight polytetrafluoroethylene (20), powder polytetrafluoroethylene (30), the additive (40) prepared by mixing In 1 mixture, water-based polyurethane resin, powder polytetrafluoroethylene, monoammonium phosphate, hydrophilic surfactant, pigment, curing accelerator, UV absorber, antioxidant, additive and acrylic resin, modified latex resin, hybrid rubber, silicone resin, Curing the topcoat layer by applying a topcoat 60 composed of mixing at least one composition selected from urethane-modified polyester (S110); and
a third drying step of drying the topcoat layer (S120);
A surface coating method using a coating composition of a concrete steel structure using a fluororesin component, characterized in that it comprises a.

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