KR102051586B1 - Paint composition for waterproof, anticorrosion and reinforcement including ceramic, fiber and polymer resin, and method for surface protection, repair and reinforcement using the same - Google Patents

Abstract

The present invention relates to: a polymer paint composition for the waterproofing function, anticorrosion, and reinforcement of concrete to prevent neutralization and salt damage by blocking the source of damage fundamentally for concrete gradually degraded by external environment; and a construction method for surface protection, repair, and reinforcement applied to structures made of steel and concrete by using the same. More specifically, the polymer composition for paint: prevents anti-rust and salt damage and protects surfaces of concrete structures or steel structures, in which rust is generated, in air or under the water, such as various general concrete structures, port structures, water and sewage treatment facilities, underground structures, exposed structures, structures which have been neutralized for a long life, bridge structures frequently subjected to wet and dry repetition, and structures which have been chemically eroded by calcium chloride, SOx, NOx, etc. More specifically, the paint composition contains fiber having excellent salt resistance and neutralization prevention ability; being not affected by oil and water; providing high temperature resistance, shrinkage stability, and crack prevention; ensuring excellent insulation with low density and light weight; and protecting paint from brittle fracture. The construction method of the present invention includes a step (A) of applying a permeable primer to the surface of a concrete structure and a step (B) of applying a coating composition for waterproofing function, anticorrosion, and reinforcement on the permeable primer.

Description

Waterproofing, anticorrosion and reinforcement paint compositions including ceramics, fibers and resins, and surface protection, repair and reinforcement methods using the same AND REINFORCEMENT USING THE SAME}

The present invention relates to a coating composition for waterproofing, anticorrosion and reinforcement including ceramics, fibers and resins, and a surface protection, repair and reinforcement method using the same.

Specifically, the present invention is chemically prepared by various general concrete structures, port structures, water and sewage treatment facilities, underground structures, exposed structures, structures that have been neutralized for a long life, bridge structures frequently subjected to wet and dry repetition, calcium chloride and SOx, NOx, and the like. The present invention relates to a coating polymer composition for preventing rust and salts and protecting the surface of concrete structures or rust-producing steel structures in the air or in water, such as erosion-producing structures, and more particularly, to prevent salt and neutralization. Coating composition containing fiber which is excellent in ability, is not affected by oil and water, provides high temperature resistance, shrinkage stability and crack prevention, is low in density and light, and has excellent thermal insulation and protects paint from brittle fracture, and using the same Surface protection, repair and reinforcement method.

Concrete structures initially form strong alkaline calcium hydroxides with a pH of 12 to 13 when the main material cement is mixed with water, so that the reinforcing bars in the concrete are surrounded by alkaline coatings to prevent rust. However, if there is no coating film on the surface of the concrete structure, harmful compounds such as chloride easily adhere to the porous concrete surface, and the harmful compound is more easily penetrated by the rain, wind, etc. because the concrete with such harmful compounds is easily attached.

In addition, the chloride rapidly penetrates in the weak parts such as construction joints and joints in which the concrete composition is unevenly distributed among the concrete structures, and the accumulation increases, thereby prematurely corroding concrete and steel (rebar). Moreover, the chloride attracts large amounts of moisture, resulting in winter freezing. Even without these defects in concrete, the amount of chloride attached to the concrete surface is known to move inside.

In addition, the carbonation reaction of carbon dioxide with concrete, acid rain from outside, polluted atmosphere, CO ₂ , SO ₂ , salts, etc., the neutralization gradually proceeds to deteriorate the concrete structure, and eventually shorten the life of the concrete structure. . Therefore, concrete structures are known to be effective in preventing corrosion of concrete and reinforcing bars by initially forming a shielding layer against harmful compounds.

The paint used in the concrete for the formation of the shielding layer should have an impregnation resistance, waterproofness, alkali resistance suitable for the properties of the concrete, and should have good performance as a coating film such as adhesion, abrasion resistance, and weather resistance. In addition to chemical resistance, paints applied to concrete surfaces also require coating properties such as water tightness, abrasion resistance, and high hardness. In the case of paints having such properties, various harmful compounds such as chlorides are difficult to adhere to the surface of the coating and are easily exposed by rainwater. Because it is washed away. Furthermore, since chloride ion permeability of a coating film having such conditions is extremely small, there is almost no internal penetration of chloride ions.

Conventional salt preventing paints for general concrete structures (bridges, bridges, tunnels, offshore structures, water purification plants, sewage facilities, etc.) are applied in various ways such as ceramics, metals, and epoxys. , Neutralization, deterioration, salting, freeze-thawing, etc.), and are impossible to work in wet and underwater conditions.

In general, the neutralization / salt prevention paints used in domestic and foreign concrete structures mainly consist of metal powder and adhesives, and ceramic-based anticorrosive paints.

 The ceramic anticorrosive coating or metal powder coating includes the basic disadvantages of the polymer resin (epoxy, urethane, acryl, etc.) used as a binder, and the durability is limited compared to the high price. In order to overcome this, most of the top coating material of different materials is used to protect the main coating film, but since it is easily peeled off each other, there are many cases in which additional costs are required for maintenance after a certain time.

Epoxy resins generally used as the adhesive have excellent water resistance, adhesiveness and chemical resistance, and thus are widely used as adhesives and coating agents for structures. The most commonly used resins are bisphenol A type, bisphenol F type, and trifunctional properties. Epoxy resins, tetrafunctional epoxy resins, novolac epoxy resins and plastic epoxy resins.

Conventional epoxy paints using the above epoxy resins (Korean Patent No. 424218, Japanese Patent Application Laid-Open No. H1-11-1335) have excellent chemical resistance, adhesion and mechanical properties, but are easily yellowed and It is easy to be used for outdoor exposed structures because it is easy to decompose and is easy to crack, and due to organic solvents used for the dispersion of epoxy resin, workability is poor in poor ventilation, and there is a risk of fire or explosion. In addition, there were problems such as environmental pollution caused by the emission of harmful organic solvents.

In addition, although a water-soluble epoxy paint has been studied to solve the above problems (Korean Patent No. 777597), there was a problem that the physical properties of the coating film is less than when using an organic solvent.

In addition, epoxy or polymer resin shrinkage occurs during curing, and at this time, a separation from the mother or a poor coating film may be formed, and brittle with time, cracking and lifting occur. .

At room temperature hardening type anticorrosive coating material used in steel structure, it is necessary to pay attention to safety when painting due to the use of organic solvents or harmful heavy metals. Damage to the painted surface is progressing in the environment, causing damage to the structure due to rust.

Therefore, while maintaining the advantages of the polymer resin, it has shrinkage stability and crack followability, and is resistant to brittle fracture, so that the development of a new coating composition that can be used for surface protection, rust prevention, repair and reinforcement in addition to the conventional neutralization and salt prevention It is required.

Korean Patent Registration No. 424218 Japanese Patent Laid-Open No. 1-21335 Korean Registered Patent No. 777597

The present invention has been made to solve the above problems, as well as the advantages of the polymer resin, as well as shrinkage stability and crack followability, resistant to brittle fracture, in addition to the conventional neutralization and salt prevention, surface protection, repair and reinforcement It is an object of the present invention to provide a new waterproofing, anticorrosion and reinforcing coating composition which can be used, including ceramics, fibers and resins.

Another object of the present invention is to provide a surface protection, repair, and reinforcement method using the coating composition for waterproofing, anticorrosion, and reinforcement.

In order to achieve the object as described above, the coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfiber of the present invention,

(A) 100 parts by weight of bisphenol A epoxy resin;

20.3 to 37.6 parts by weight of acrylate resin;

7.4 to 13.7 parts by weight of a reactive epoxy diluent;

9.2 to 17.1 parts silicon carbide;

9.2 to 17.1 parts by weight of alumina;

9.2 to 17.1 parts silica;

11.1 to 20.5 parts by weight of ZnO;

16.6 to 30.8 parts TiO ₂ ;

CaCO ₃ 12.9 to 23.9 parts by weight;

Inorganic pigments 14.7 to 27.4 parts by weight;

0.7 to 1.4 parts by weight of hydrophilic silica fine powder;

0.7 to 1.4 parts by weight of lipophilic clay powder;

0.2 to 0.3 parts by weight of an epoxy silane coupling agent;

Antifoaming agent 0.4-0.7 parts by weight;

0.7 to 1.4 parts by weight of dispersant;

0.4 to 0.7 parts by weight of UV stabilizers;

0.6 to 1.0 parts by weight of sunscreen;

22.1 to 41.1 parts by weight of zirconia microfibers;

0.9 to 1.7 parts by weight of leveling agent; And

0.9 to 1.7 parts by weight of flow and antisettling agent;

Topics including; And

(B) 100 parts by weight of modified alicyclic amine;

15.0 to 27.9 parts by weight of a yellowed polyisocyanate curing agent;

16.2 to 30.2 parts silica;

CaCO ₃ 20.0-37.1 parts by weight;

1.2 to 2.3 parts by weight of lipophilic clay powder;

Antifoam 0.5 to 0.9 parts by weight;

0.8 to 1.4 parts by weight of dispersant;

1.2 to 2.3 parts by weight of hydrophilic silica fine powder;

15.0 to 27.9 parts by weight of zirconia microfibers; And

1.2 to 2.3 parts by weight of leveling agent;

Hardener

And the weight ratio of the subject: curing agent is 1: 1 to 5: 1, preferably 1: 1 to 4: 1, more preferably 1: 1 to 3: 1.

In addition, the epoxy equivalent of the bisphenol A epoxy resin may be 180 to 195 g / eq.

In addition, the viscosity of the bisphenol A epoxy resin may be 11000 to 14000 cps at 25 ℃.

And, the epoxy equivalent of the reactive epoxy diluent may be 250 to 400 g / eq.

In addition, the average particle diameter of the silicon carbide may be 300 to 500 nm.

In addition, the alumina may be easily sinterable.

In addition, the average particle diameter of the alumina may be 500 to 1000 nm.

In addition, the average particle diameter of the ZnO may be 500 to 1000 nm.

In addition, the average particle diameter of TiO ₂ may be 100 to 300 nm.

And, the average particle diameter of CaCO ₃ constituting the subject may be 500 to 1000 nm.

And, the inorganic pigment constituting the subject may be Fe ₂ O ₃ .

In addition, the average particle diameter of the hydrophilic silica fine powder may be 5 to 10 nm.

In addition, the specific surface area (BET) of the hydrophilic silica fine powder may be 250 to 350 m ² / g.

In addition, the average particle diameter of the lipophilic clay fine powder may be 1 to 5 ㎛.

And, the bulk density of the lipophilic clay powder may be 250 to 500 g / ℓ.

And, the amine equivalent weight of the modified alicyclic amine may be 200 to 350 mgKOH / g.

In addition, the gel time of the modified alicyclic amine may be 30 minutes to 1 hour.

In addition, the viscosity of the non-yellowing polyisocyanate curing agent may be 230 to 450 cps.

In addition, the average particle diameter of the silica may be 700 to 1500 nm.

In addition, the average particle diameter of CaCO ₃ constituting the curing agent may be 300 to 500 nm.

And, the length of the zirconia microfibers may be 10 to 30 ㎛.

In addition, the leveling agent may be a polysiloxane-modified polyacrylate.

And, the flow and sedimentation inhibitor may be urea urethane.

The flow and sedimentation inhibitor may be one containing lithium chloride.

On the other hand, the concrete structure surface protection method of the present invention

(A) applying a permeable primer to the surface of the concrete structure, and

(B) characterized in that it comprises the step of applying the coating composition of the present invention on the permeable primer.

And, the permeable primer of step (A) may form a waterproof layer of 2.0 to 5.0 mm depth.

In addition, the coating composition of the present invention of step (B) may be applied 1 to 4 times with a thickness of 50 to 100 ㎛ per time.

The concrete structure surface protection method may further include applying a top coating agent on the coating composition of the present invention after the step (B).

In addition, the top coating agent may be applied 1 to 2 times with a thickness of 50 to 100 ㎛ per time.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

In addition, the pressure may be 1500 to 2100 psi when the airless spray is applied.

On the other hand, the steel structure surface protection method of the present invention

(C) applying an antirust primer to the surface of the steel structure, and

(D) characterized in that it comprises the step of applying the coating composition of the present invention on the anti-rust primer.

And, the anti-rust primer of step (C) may be applied once or twice with a thickness of 50 to 100 ㎛ per time.

And, the coating composition of the present invention of step (D) may be applied 1 to 4 times with a thickness of 50 to 100 ㎛ per time.

The surface protection method of the steel structure may further include applying a top coating agent on the coating composition of the present invention after the step (D).

In addition, the top coating agent may be applied 1 to 2 times with a thickness of 50 to 100 ㎛ per time.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

In addition, the pressure may be 1500 to 2100 psi when the airless spray is applied.

On the other hand, the structure repair and reinforcement method of the present invention

(E) applying a mixture of 100 parts by weight of the coating composition of the present invention and 210 to 350 parts by weight of artificial silica sand to the surface of the structure.

In addition, the mixture of the coating composition and artificial silica of the present invention may be applied to a thickness of 2 to 50 mm.

In addition, the structure repair and reinforcement method may further include applying the coating composition of the present invention on the mixture of the coating composition and artificial silica of the present invention.

In addition, the coating composition of the present invention, which is applied on the mixture of the coating composition of the present invention and artificial silica, may be applied once or twice with a thickness of 50 to 100 μm.

In addition, the structure repair and reinforcement method may further include applying a top coating agent on the coating composition of the present invention and artificial silica or a coating composition of the present invention.

In addition, the top coating agent may be applied 1 to 2 times with a thickness of 50 to 100 ㎛ per time.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

In addition, the pressure may be 1500 to 2100 psi when the airless spray is applied.

In addition, the reinforcement index may be 1 to 100, preferably 2 to 50, more preferably 2.5 to 20.

The coating composition for waterproofing concrete of the present invention is excellent in adhesion with the existing concrete structure, and excellent in strength performance. In addition, as an eco-friendly coating composition that does not use thinners or organic solvents, no harmful substances are eluted from the contact surface with water. In addition, the coating composition of the present invention has almost no damage to freezing and thawing, so that the durability of concrete is greatly improved, and corrosion resistance (sulphate, carbonate, etc.) and chemical resistance (sulfuric acid, hydrochloric acid, nitric acid, calcium chloride) in salt and high corrosion environments Etc.) is excellent. In addition, it is excellent in UV protection, less discoloration and lifting, and excellent in quality stability and economical efficiency of maintenance.

In addition, the coating composition of the present invention is a non-toxic eco-friendly anti-corrosion method of the coating method for preventing corrosion and contamination resistance as well as rust prevention of steel structures, and excellent anti-ultraviolet resistance, less discoloration and lifting, less steel structure according to the external environment Its durability is semi-permanent due to its new anti-corrosion and pollution resistance method.

In addition, the polymer coating composition of the present invention can prevent the deterioration of the concrete caused by the neutralization of the concrete due to the contact of the exhaust gas (sulphite gas, nitrous acid gas, etc.) or carbon dioxide gas and calcium hydroxide, and when exposed to salt damage In addition to preventing salts, corrosion of internal reinforcing bars can also be prevented.

In addition, the coating composition of the present invention can be added to the leveling agent to facilitate the smoothing of the surface of the structure during construction, flow and sedimentation inhibitors are added, it is excellent in the convenience of construction and ease of storage.

In addition, the characteristics of the zirconia contained in the coating composition of the present invention is excellent in resistance to chemical changes, unaffected by oil and water, excellent in high temperature resistance, high hardness and contributes to improving the durability of the coating film. The composition containing the same provides shrinkage stability and crack prevention to increase resistance to separation or lifting generated during shrinkage. In addition, it is low in density and light, so that the amount of heat storage is low and the thermal conductivity is low, so it is excellent in heat insulation, prevents the flow of paint and raises a thick coating film at once. It also increases resistance to thermal shock, reducing paint damage at high or cryogenic temperatures. Furthermore, the fiber overcomes the weakness of the impact due to the brittleness of the paint, thereby protecting the paint from the brittle fracture which is the biggest disadvantage. And it has good sound absorption and elasticity, so it can withstand vibration and absorb vibration.

Therefore, the coating composition of the present invention is a concrete and steel protection performance as described above, reinforced concrete structures and steel, such as urban structures with a relatively high concentration of carbon dioxide, coastal structures exposed to salt damage, underground structures exposed to poor conditions It can be applied to the whole structure, so it can be said that the ripple force is large.

Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, many specific details such as specific components are described in the following description, which is provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It is self-evident to those who have knowledge of the world. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In the present invention, the 'reinforcement index' is defined as follows:

Reinforcement index = (film thickness of the coating composition of the present invention) / (length of the microfibers).

The present invention is to apply the polymer coating composition to strengthen the concrete surface due to the first penetration into concrete and to show the waterproof anticorrosion or corrosion resistance to steel, secondary salt resistance and chemical resistance, heat resistance, abrasion resistance, anti-neutralization ability It is excellent in UV protection and stability, is not affected by oil and water, and provides high temperature resistance, shrinkage stability and crack prevention, low density and lightness, excellent thermal insulation, and protects paint from brittle fracture. The present invention relates to a method of protecting, repairing, and reinforcing the surface of concrete and steel for the purpose of protecting the structure from salting and neutralization as well as expressing excellent anti-rusting performance and maintaining the aesthetics of the structure and improving durability.

First, the epoxy resin constituting the subject of the present invention uses an epoxy equivalent of 180 to 195 g / eq of the bisphenol A type epoxy resin, which is a representative epoxy resin. By using the epoxy resin of the said equivalent range, target coating film physical properties can be ensured and the appearance fall of a coating film can be prevented. In addition, the epoxy resin of the present invention can ensure the achievement of the above object and productivity that the viscosity at 25 ℃ 11000 to 14000 cps. The bisphenol-A epoxy resin satisfying such an equivalent and viscosity range can form a coating film having excellent anticorrosiveness, watertightness, chemical resistance, etc. without a thinner or an organic solvent when mixed with a modified alicyclic amine curing agent to be described later.

The subject of the polymer coating composition of the present invention includes the acrylate resin, the reactive epoxy diluent, and the epoxy silane coupling agent in addition to the bisphenol-A epoxy resin, and thus may have the above physical properties such as anticorrosion, water-tightness, chemical resistance, and the like. The function is optimized. In particular, by containing an acrylate resin in addition to the epoxy resin, it is possible to obtain a composite coating layer in which an epoxy resin is placed on the concrete base material and an acrylate resin is located on the opposite side (outward direction). The content of the acrylate resin is preferably 20.3 to 37.6 parts by weight per 100 parts by weight of the bisphenol A epoxy resin.

And, in order to control the viscosity control and reactivity of the main ingredient component of epoxy equivalent 135 to 330 g / eq BGE (butyl glycidyl ether), PGE (phenyl glycidyl ether), aliphatic glycidyl ether (C12- Reactive epoxy diluents such as C14). The polymer coating composition of the present invention preferably contains such a reactive epoxy diluent in an amount of 7.4 to 13.7 parts by weight per 100 parts by weight of the bisphenol A epoxy resin. If it is less than 7.4 parts by weight, the dilution effect is inferior, and thus the stirring of the composition is impossible. If it is more than 13.7 parts by weight, the viscosity of the main composition is excessively reduced and serves to hinder the reaction between the main agent and the curing agent. And, the epoxy equivalent of the reactive epoxy diluent is preferably 250 to 400 g / eq.

The polymer coating composition of the present invention also contains a large amount of nanoceramic particles, specifically silicon carbide, alumina, silica, ZnO, TiO ₂ , and CaCO ₃ . Preferably, these ceramic particles have an average particle diameter in the nano range, specifically, the average particle diameter of the silicon carbide is 300 to 500 nm, the average particle diameter of the alumina is 500 to 1000 nm, the average particle diameter of the silica is 700 to 1500 nm, The average particle diameter of ZnO is 500 to 1000 nm, the average particle diameter of TiO ₂ is preferably 100 to 300 nm, and the average particle diameter of CaCO ₃ is 500 to 1000 nm.

Among them, silicon carbide is artificially present because it does not exist as a natural mineral, and has excellent chemical stability and corrosion resistance at high temperature and high hardness. Since the silicon carbide and alumina ultra-fine particle powder floats on the surface of the coating film during drying to form a dense and high hardness coating, it prevents the permeation of water vapor, other gases and liquids, as well as moisture resistance, durability, weather resistance, and impact resistance. It has excellent chemical resistance and the painted surface reflects light to protect the coating from UV rays. In addition, due to the excellent thermal stability of silicon carbide and alumina to prevent the rise of the temperature of the adherend to reduce the shrinkage, expansion of the concrete and to prevent the neutralization / chloride of the resin to maintain the durability of the coating for a long time. The polymer coating composition of the present invention contains 9.2 to 17.1 parts by weight of such silicon carbide powder per 100 parts by weight of bisphenol A epoxy resin. If the silicon carbide is less than 9.2, the chemical resistance and properties are not exhibited. If the silicon carbide exceeds 17.1 parts by weight, the workability is reduced due to the viscosity increase, and the hardness of the coating film is excessively increased, causing brittle fracture.

And the subject matter of the present invention also contains alumina, which has high hardness and is very good in strength and corrosion resistance. It is more preferred that the alumina is particularly sinterable. And, the content of such alumina is preferably contained 9.2 to 17.1 parts by weight of alumina per 100 parts by weight of the bisphenol A epoxy resin, if less than 9.2 parts by weight does not exhibit the function of ultraviolet reflection, corrosion protection, etc., 17.1 parts by weight If exceeded, workability is inferior due to increase in viscosity and specific gravity.

The content of the other nanoceramic particles is 9.2 to 17.1 parts by weight of silica, 11.1 to 20.5 parts by weight of ZnO, 16.6 to 30.8 parts by weight of TiO ₂ , and 12.9 to 23.9 parts by weight of CaCO ₃ per 100 parts by weight of the bisphenol A epoxy resin. It is preferable for exhibiting the physical properties of the paint. If the content of ZnO and TiO ₂ is less than the above range, it is not possible to expect UV blocking and reflecting effects and pollutant purification effects. If the ZnO and TiO ₂ contents are exceeded, the coating film excessively reflects light and thus cannot be used in structures requiring safety.

Next, as the pigment constituting the subject of the present invention, it is preferable to use an inorganic pigment, especially Fe ₂ O ₃ . The inorganic pigment is preferably added 14.7 to 27.4 parts by weight per 100 parts by weight of the bisphenol A epoxy resin constituting the main body, less than 14.7 parts by weight does not express a vivid color, when the inorganic pigment exceeds 27.4 parts by weight it takes time for the coating film to cure This excessively long, economic efficiency is significantly reduced, the surface roughness of the coating film may be adversely affected physical properties.

On the other hand, to achieve another great feature of the present invention is that the thixotropic agent also used a ceramic fine powder thixotropic agent in order to improve the environmental friendliness. The ceramic fine powder thixotropic agent constituting the subject of the present invention is preferably a mixture of hydrophilic silica fine powder and lipophilic clay fine powder.

Preferably, the hydrophilic silica fine powder has an average particle diameter in the range of 5 to 10 nm, and the specific surface area (BET) is preferably in the range of 250 to 350 m ² / g for the purpose of the present invention.

In addition, the lipophilic clay fine powder is preferably in the range of 1 to 5 탆 in average particle diameter, and the bulk density is preferably in the range of 250 to 500 g / L.

The hydrophilic silica fine powder and the lipophilic clay fine powder may each contain 0.7 to 1.4 parts by weight per 100 parts by weight of the bisphenol A type epoxy resin constituting the subject of the present invention, thereby improving flowability and rheological properties of the coating film. It is preferable for the expression of strength, hardness and surface roughness of the coating film. If the content is less than 0.7 parts by weight, the above effect cannot be expected. If the content is more than 1.4 parts by weight, the surface roughness and workability of the coating film are adversely affected, and if the coating layer is not formed at all, the coating film is not formed at all and remains in paste form.

Due to the inclusion of the aforementioned nanoceramic particles and the ceramic fine powder thixotropic agent, the polymer coating composition of the present invention may exhibit a paste state suitable for repairing a cross section of a severely damaged concrete structure.

In addition, the coupling agent used to improve the adhesion between the paint and the adherend in the present invention uses an epoxy silane compound (3-glycidoxypropyltrimethoxysilane) having a molecular weight of about 220 to 250. In addition, amino silane (3-aminopropyltriethoxysilane), acrylic silane (3-methacryloxypropyltrimethoxysilane), mercapto silane (3-mercaptopropyl trimethoxysilane), and the like can also be used. . The polymer coating composition of the present invention contains such a silane compound in an amount of 0.2 to 0.3 parts by weight per 100 parts by weight of the bisphenol A epoxy resin. The silane compound is the most suitable ratio commonly used in the industry for increasing adhesion between dissimilar materials having different properties. If the content of the silane compound is less than 0.2 part by weight or more than 0.3 part by weight, the effect of improving adhesion may not be expected. .

In the present invention, it is also preferable to use an antifoaming agent for the removal of bubbles generated during the preparation of the subject. The amount of the antifoaming agent is preferably 0.4 to 0.7 parts by weight per 100 parts by weight of the bisphenol-A epoxy resin, but less than 0.4 parts by weight of the defoaming function does not appear, if exceeding 0.7 parts by weight of the coating film deterioration and blushing phenomenon.

In addition, it is preferable to use a dispersant for uniform dispersion of the agent. It is more preferable to use a high molecular weight block copolymer solution having a pigment affinity in consideration of the bisphenol A type epoxy resin and inorganic pigment constituting the dispersant used in the present invention. The amount of the dispersant used in the subject matter of the present invention is preferably 0.7 to 1.4 parts by weight per 100 parts by weight of the bisphenol-A epoxy resin. Outside of the above ranges, pigment aggregation, gloss reduction and adhesion defects occur, and the coating film is firm. Not only does it fall, but there is a problem that sulfidation occurs.

The subject matter constituting the polymer coating composition of the present invention also preferably contains 0.4 to 0.7 parts by weight of the UV stabilizer and 0.6 to 1.0 parts by weight of the sunscreen per 100 parts by weight of the bisphenol-A epoxy resin to improve the UV resistance of the coating film. . If it is less than the above content range, it is difficult to sufficiently anticipate the sunscreen effect, and if it exceeds the above range, not only economic efficiency is lowered, but also may adversely affect the coating properties.

In addition, the subject matter of the present invention may further comprise zirconia microfibers. The amount of the microfibers added may be 22.1 to 41.1 parts by weight per 100 parts by weight of bisphenol A epoxy resin. If the amount of the microfibers is less than the above range, the brittle fracture resistance due to deterioration of the coating is lowered, so the effect is hard to expect. On the contrary, if the above range is exceeded, the coating work becomes difficult due to the increase in viscosity, and agglomeration of fibers may occur, thereby making it difficult to obtain a homogeneous result, leading to a decrease in strength and a decrease in adhesion.

Zirconia has excellent resistance to chemical changes, unaffected by oil and water, and high temperature resistance. In addition, the high hardness also contributes to improving the durability of the coating film. When it is added as a fiber to paints, repairs and reinforcements, the following characteristics are obtained.

Existing epoxy or polymer resins shrink when hardening, and at this time, separation from the mother or poor coating film may be formed, and brittle with time, cracking and lifting occur a lot, but zirconia microfibers have shrinkage stability and Providing crack prevention resistance increases resistance to separation or lifting generated during shrinkage.

In addition, it is low in density and light, so that the amount of heat storage is low and the thermal conductivity is low, so it is excellent in heat insulation, prevents the flow of paint and raises a thick coating film at once. It also increases resistance to thermal shock, reducing paint damage at high or cryogenic temperatures.

In addition, due to the brittleness of the paint to overcome the disadvantages weak to the impact of the fiber can be protected from the brittle fracture which is the biggest disadvantage. And it has good sound absorption and elasticity, so it can withstand vibration and absorb vibration.

The length of the zirconia microfibers added to the subject matter of the present invention is preferably 10 to 30 μm, but if it is less than the above, the tensile performance of the paint is not improved, so the effect is difficult to be expected. When the thickness is 50 μm, fibers protrude on the surface of the coating film, which makes it difficult to obtain clean paint quality, and agglomeration may occur, resulting in abnormal material quality.

In addition, the subject matter of the present invention may further include a leveling agent to facilitate the smoothing of the surface of the structure during construction, the leveling agent may be a polysiloxane modified polyacrylate as a main component. In addition, the amount of the leveling agent added may be 0.9 to 1.7 parts by weight per 100 parts by weight of the bisphenol A epoxy resin. If the amount of the leveling agent is less than the above range, when the coating composition prepared is applied, a creering phenomenon may occur that flows down before the layer is formed to a desired coating thickness or that the surface is not smooth and uneven. On the contrary, if the above range is lowered, the performance of other additives is lowered, thereby lowering the physical properties of the entire material, and abnormal hardening due to strength decrease and curing delay may occur.

The subject matter of the present invention may further include a flow and sedimentation inhibitor to improve the convenience of construction and ease of storage, the flow and sedimentation inhibitor may be based on urea urethane, and further It is preferable to contain. In addition, the amount of the added flow and the anti-settling agent may be 0.9 to 1.7 parts by weight per 100 parts by weight of the bisphenol A epoxy resin. If the amount of flow and anti-settling agent is less than the above range, material separation may occur over time during storage of the prepared coating composition, resulting in a layer of polymer resin and additive materials, which may cause abnormalities in physical properties. On the contrary, if the above range is exceeded, the painting work becomes difficult due to the increase in viscosity, and abnormal hardening due to a decrease in strength and delay in curing may occur.

On the other hand, it is preferable to use a modified alicyclic amine in consideration of the reactivity with the bisphenol A type epoxy resin constituting the base of the coating film. In the present invention, it is particularly preferable to have a low temperature curing type that can be cured even in a humid environment and in water.

To this end, the amine equivalent of the curing agent is 200 to 350 mgKOH / g, the gel time is particularly preferably in the range of 30 minutes to 1 hour. Furthermore, the viscosity is preferably about 230 to 450 cps. Through this, it is possible to form a coating film that satisfies the requirements without thinners or organic solvents, and in particular, it can secure excellent physical properties when applied to reinforced concrete.

On the other hand, the curing agent of the present invention preferably contains 15.0 to 27.9 parts by weight per 100 parts by weight of the non-yellowing polyisocyanate curing agent in addition to the modified alicyclic amine to prevent yellowing with curing. .

The curing agent used in the coating composition of the present invention preferably contains nanoceramic particles, in particular silica and CaCO ₃ , as in the aforementioned subject matter. The function of these nanoceramic particles is as described in the above-mentioned subject, and the content is preferably 16.3 to 30.2 parts by weight of silica and 20.0 to 37.1 parts by weight of CaCO ₃ per 100 parts by weight of the modified alicyclic amine.

On the other hand, the curing agent of the present invention may also include a ceramic fine powder thixotropic agent having the above-described average particle diameter, specific surface area and bulk density range, hydrophilic silica fine powder and lipophilic clay fine powder, the modified alicyclic amine 100 of the present invention It is preferable to include 1.3 to 2.3 parts by weight, and 0.5 to 0.9 parts by weight, respectively, by weight, and if the content is less than the stated content, the strength, hardness, and surface roughness of the coating do not meet the requirements, and if it exceeds the surface of the coating Bad influence on roughness and workability.

And, the curing agent of the present invention preferably further comprises an antifoaming agent as added to the above subject, the addition amount is preferably 0.8 to 1.4 parts by weight per 100 parts by weight of the modified alicyclic amine, less than 0.8 parts by weight of the defoaming function does not appear If it exceeds 1.4 parts by weight, deterioration and blushing of the coating film will occur.

The curing agent of the present invention preferably further comprises a dispersant as added to the above subject matter. The amount of the dispersant added is preferably 1.3 to 2.3 parts by weight per 100 parts by weight of the modified alicyclic amine. If the dispersing agent is out of the above ranges, gloss reduction and adhesion defects occur, and the coating film is not hardened, and the sulfidation occurs. have.

In addition, the curing agent of the present invention may further comprise zirconia microfibers as in the subject matter. The amount of the microfibers added may be 15.0 to 27.9 parts by weight per 100 parts by weight of the modified alicyclic amine. If the amount of the microfibers is less than the above range, the brittle fracture resistance due to deterioration of the coating is lowered, so the effect is hard to expect. On the contrary, if the above range is exceeded, the coating work becomes difficult due to the increase in viscosity, and agglomeration of fibers may occur, thereby making it difficult to obtain a homogeneous result, leading to a decrease in strength and a decrease in adhesion.

The length of the zirconia microfiber is preferably 10 to 30 ㎛ as in the subject, if less than the tensile performance of the paint does not improve the effect is difficult to expect, on the contrary, if the coating film thickness is applied once exceeds the above range When 50 μm, the fibers protrude on the surface of the coating film, making it difficult to obtain clean paint quality, and agglomeration or the like may occur, which may cause abnormalities in material quality.

In addition, the curing agent of the present invention may further include a leveling agent similarly to the above subject matter. The amount of leveling agent added may be 1.2 to 2.3 parts by weight per 100 parts by weight of the modified alicyclic amine. If the amount of the leveling agent is less than the above range, when the coating composition prepared is applied, a creering phenomenon may occur that flows down before the layer is formed to a desired coating thickness or that the surface is not smooth and uneven. On the contrary, if the above range is lowered, the performance of other additives is lowered, thereby lowering the physical properties of the entire material, and abnormal hardening due to strength decrease and curing delay may occur.

The blending ratio of the subject: curing agent of the present invention is preferably 1: 1 to 5: 1, preferably 1: 1 to 4: 1, more preferably 1: 1 to 3: 1 by weight. Subject: Curing agent = Less than 5: 1, the amount of curing agent is absolutely insufficient amine groups to react with the epoxy group can not exhibit the performance as a paint, if the amount of curing agent is larger than 1: 1, reacts rapidly with the main composition, or Excess amine compound reacted may remain in the composition, resulting in deterioration of physical properties.

The coating composition for waterproofing concrete of the present invention starts to cure within 30 minutes when the main body and the curing agent are mixed with each other in the air or in water, and is generally completely cured within 2 hours. Prepared in the form of a composition.

First, the main ingredient is a bisphenol A epoxy resin and a small amount of dispersant are mixed at a low speed first, and then, other than the antifoaming agent and the thixotropic agent, the remaining ingredients are sufficiently dispersed at high speed. Next, the thixotropic agent of hydrophilic silica fine powder and lipophilic clay fine powder is added little by little, and it mixes 30 minutes or more at high speed more than 4000 rpm. Finally, a small amount of antifoaming agent is added to the resulting mixture, and the mixture is stirred at a low speed to remove air bubbles in the waterproof coating composition.

The curing agent is also prepared in the same manner as the production method of the above subject matter.

The coating composition of the present invention is applied to the concrete surface in order to prevent the corrosion of the concrete, forming a layer of ceramic components such as silicon carbide, alumina, silica mixed on the surface of the concrete structure, the double polymer component (epoxy And acrylic). In addition, through the UV blocking component (radical trapping agent, phenolic liquid type) that floats on the top of the film, the durability is dramatically increased without the need for a separate top coating material, and a dense coating layer is formed together with the ceramic component to prevent chloride and Infiltrating chemicals can be blocked at source.

The coating composition of the present invention is a composite of an epoxy and a modified alicyclic amine, together with an acrylate and a yellowed polyisocyanate curing agent. Upon curing, the epoxy resin is mainly present on the adhesive surface of the concrete substrate, and the acrylate resin floats to the outside. The double coating film layer is formed by only one application. Through this, it is possible to completely overcome the shortcomings of the epoxy resin which is easily yellowed and decomposed by ultraviolet rays by the acrylate resin layer combined with the ultraviolet blocking component. Therefore, it is possible to significantly increase the life of the coating film by further increasing the blocking function of harmful compounds including ultraviolet ray blocking performance, pollutant purification function, and neutral flame prevention.

Furthermore, the paint composition of the present invention is a paint containing zirconia microfibers, has excellent resistance to chemical changes characteristic of zirconia, and thus is not affected by oil and water. In addition, it has excellent high temperature resistance and has high hardness to improve durability, and provides shrinkage stability and crack prevention to increase resistance to separation or lifting generated during shrinkage. In addition, the low density and light characteristics, the amount of heat storage is low and the thermal conductivity is low, excellent heat insulation, prevent the flow of paint and can raise a thick coating film at once. And it increases the resistance to thermal shock to reduce the damage of the paint at high temperature or cryogenic temperature, and because the fiber overcomes the disadvantages of the brittleness of the paint has the characteristic of protecting the paint from brittle fracture, which is the biggest disadvantage. Lastly, it has excellent sound absorption and good elasticity, so it can withstand vibrations and absorb vibrations, which is superior to other paints. As a result, adhesion and durability, water resistance and moisture resistance, chemical resistance and heat resistance, impact resistance and crack tracking resistance, weather resistance, etc. are superior to other paints, thus forming a coating film that completely protects the adherend concrete. The durability of the coating is maintained for a long time even in natural or artificial conditions.

On the other hand, the concrete structure surface protection method of the present invention

(A) applying a permeable primer to the surface of the concrete structure, and

(B) characterized in that it comprises the step of applying the coating composition of the present invention on the permeable primer.

The application of the permeable primer is made by applying the permeable primer to the surface of the concrete structure with an airless spray or directly with a roller. The permeable primer penetrated to the depth of 2.0 to 5.0 mm through this coating step is integrated with the concrete to form a waterproof layer. The waterproof anticorrosive layer serves to reinforce the concrete matrix, and if the moisture inside the concrete is high, less penetration may occur and damage may occur due to expansion due to evaporation of water after formation of the coating layer. In the case that the next paint surface is formed in the concrete is not reinforced there is a problem that the effect is reduced.

After the permeable primer has penetrated the concrete surface, the coating composition of the present invention is applied to the permeable primer at an thickness of 50 to 100 μm per time through an airless spray or a brush or a roller 1 to 4 times. If the film is too thin, it is difficult to exhibit the coating properties such as surface protection, waterproofing, anticorrosion, etc. On the contrary, too thick may cause flow generation and incomplete curing.

The surface protection method of the concrete structure may further include applying a top coating agent on the coating composition of the present invention after the step (B).

In the case of concrete structures requiring more severe conditions or ultra-durability, the step of applying the UV coating and antifouling top coating agent to the coating composition of the present invention once or twice at a thickness of 50 to 100 μm per time is added. It can be included as. If the film is too thin, the UV protection performance is lowered. On the contrary, if the film is too thick, it may cause flow generation and incomplete curing, and the color of the final film may be inconsistent.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

When the airless spray is applied, the pressure may be 1500 to 2100 psi. When the coating pressure is out of the above range, the pressure is not evenly sprayed to cause agglomeration or scattering, and as a result, the uniformity of the coating is lowered and the amount of material consumed is increased. Efficiency decreases rapidly.

On the other hand, the steel structure surface protection method of the present invention

(C) applying an antirust primer to the surface of the steel structure, and

(D) characterized in that it comprises the step of applying the coating composition of the present invention on the anti-rust primer.

The application of the rust preventive primer is carried out once or twice with a thickness of 50 to 100 μm per time by applying an airless spray or a roller directly to the steel structure surface with an excellent rust preventive performance. Through this coating step, a film of the rust preventive primer is formed on the surface of the steel structure. If the coating film is too thin, it is difficult to exhibit the coating film properties such as rust prevention and adhesion performance, and on the contrary, too thick may cause flow generation and incomplete curing.

After the antirust primer is applied, the composition of the present invention is applied on the antirust primer 1 to 4 times at a thickness of 50 to 100 μm per time through an airless spray or a brush or a roller. If the coating is too thin, it is difficult to exhibit the coating characteristics such as surface protection, rust prevention, waterproofing, anticorrosion, etc. On the contrary, if the coating is too thick, it may cause flow generation and incomplete curing.

The surface protection method of the steel structure may further include applying a top coating agent on the coating composition of the present invention after the step (D).

In the case of steel structures that require more severe conditions or ultra-durability, the method further includes applying a top coating agent, which is further enhanced with sunscreen and antifouling property, to the coating composition of the present invention once or twice in a thickness of 50 to 100 μm. can do. If the film is too thin, the UV protection performance is lowered. On the contrary, if the film is too thick, it may cause flow generation and incomplete curing, and the color of the final film may be inconsistent.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

The pressure when applied with the airless spray may be 1500 to 2100 psi. When the coating pressure is out of the above range it is not evenly sprayed to cause agglomeration or scattering, etc. As a result, the uniformity of the coating is not only reduced, but also the amount of material consumed is increased, the efficiency is sharply reduced and pinholes or air pockets may be generated.

On the other hand, the structure repair and reinforcement method of the present invention in the form of a mixture of 100 parts by weight of the paint composition of the present invention and 210 to 350 parts by weight of artificial silica sand in the form of plastering or foam to the surface of the structure by applying a thickness of 2 to 50 mm to the cross section Form.

If the amount of artificial silica sand is less than the above range, the generated cross section flows or sags, making it difficult to produce an intact cross section. On the contrary, if the amount exceeds the above range, the adhesion force with the mother occurs and the viscosity is difficult to fill in the plaster or foam. It's very hard.

If the coating thickness is less than 2 mm, the water-retaining effect is inferior. If the coating thickness is greater than 50 mm, when the coating is applied to a wall or a ceiling, the weight thereof is excessively increased, so that lifting, sagging and detachment may occur.

For structures that require color development or additional durability enhancement, the composition of the present invention may be applied to the repair-reinforced cross section (a mixture of the paint composition of the present invention and man-made silica) by airless spray, brush, or roller at a rate of 50 to 100 μm per revolution. If the coating is applied once or twice in thickness, if the coating film is too thin, it is difficult to exhibit the coating film properties, on the contrary, if too thick, it may cause flow generation and incomplete curing.

In addition, the structure repair and reinforcement method may further include applying a top coating agent on the coating composition of the present invention and artificial silica or a coating composition of the present invention.

In addition, in the case of a structure that requires more harsh conditions or ultra-durability, it is preferable to further include a step of applying the top coating agent, which is further strengthened UV protection and antifouling properties, at a thickness of 50 to 100 μm once or twice. If the film is too thin, the UV protection performance is lowered. On the contrary, if the film is too thick, it may cause flow generation and incomplete curing, and the color of the final film may be inconsistent.

And, the application may be performed by airless spray, brush, roller or a combination thereof.

The pressure when applied with the airless spray may be 1500 to 2100 psi. If the coating pressure is out of the above range is not evenly sprayed to cause agglomeration or scattering, etc. As a result, the uniformity of the coating is reduced, as well as the amount of consumed material is increased, the efficiency is drastically reduced.

In the present invention, the reinforcement index may be 1 to 100, preferably 2 to 50, more preferably 2.5 to 20. The reinforcement index is defined as follows:

Reinforcement index = (film thickness of the coating composition of the present invention) / (length of the microfibers).

Specifically, the reinforcement index is the thickness of the coating film per unit length of the microfibers, and corresponds to the intrinsic coating thickness in which the reinforcing effect is expressed by the microfibers, not the apparent coating film thickness. For example, if the thickness of the coating film is the same, the longer length of the microfiber shows a better reinforcing effect.

If the reinforcement index in the present invention is less than the above range it is difficult to achieve a sufficient level of reinforcement effect, on the contrary, if the above reinforcement index is exceeded, it may cause flow generation and incomplete hardening.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described.

Example

Examples: Waterproofing, anticorrosion and reinforcing coating compositions including ceramics, fibers and resins

Examples were prepared by mixing according to the contents of Table 1.

Test Example 1: Measurement of Properties

Table 2 to Table 5 show the results of mixing and curing the main material and the hardening material of the coating material consisting of the two-component composition prepared in the above example, and applying the cured material to concrete and iron specimens.

As can be seen in Tables 2 to 5, the waterproof, anticorrosive and reinforcing coating compositions of the present invention do not use thinners or organic solvents, and despite high environmental friendliness, various strengths and resistances required in concrete or iron, etc. Impact, moisture resistance, oil resistance, chemical resistance, high hardness, as a result it was confirmed that also excellent corrosion resistance. Furthermore, it is possible to control the pot life by adjusting the mixing ratio of the main agent and the curing agent, workability in the field is also very excellent advantages. In addition, it was confirmed that the introduction of zirconia microfibers improves the shrinkage stability and crack followability, protects the paint from brittle fracture, and significantly reduces the separation or lifting of the mother.

In the above description of the preferred embodiment of the present invention, the present invention is not limited to the specific embodiments described above, those skilled in the art various modifications without departing from the gist of the present invention Of course it is possible. Therefore, the scope of the present invention should not be construed as being limited to the above embodiments, but should be defined by the claims below and equivalents thereof.

Claims (4)

delete As a concrete structure surface protection method,
(A) applying a permeable primer to the surface of the concrete structure, and
(B) applying a waterproof, anticorrosive and reinforcing coating composition containing nanoceramic and microfibers on the permeable primer,
The permeable primer of step (A) forms a waterproof layer of 2.0 to 5.0 mm depth,
Waterproofing, anticorrosion and reinforcing coating composition containing the nanoceramic and microfiber of the step (B) is applied 1 to 4 times with a thickness of 50 to 100 ㎛ per time,
The concrete structure surface protection method further comprises the step of applying a top coating agent on the coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfiber after the step (B),
The top coating agent is applied once or twice with a thickness of 50 to 100 ㎛ per time,
The application is carried out by airless spray, brush, roller or a combination thereof,
The pressure when applied with the airless spray is 1500 to 2100 psi,
The coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfiber
(A) 38 parts by weight of bisphenol A epoxy resin;
11 parts by weight of acrylate resin;
4 parts by weight of a reactive epoxy diluent;
5 parts by weight of silicon carbide;
5 parts by weight of alumina;
5 parts by weight of silica;
ZnO 6 parts by weight;
9 parts by weight of TiO ₂ ;
CaCO ₃ 7 parts by weight;
8 parts by weight of inorganic pigments;
0.4 part by weight of hydrophilic silica fine powder;
0.4 part by weight of lipophilic clay powder;
0.1 parts by weight of an epoxy silane coupling agent;
0.2 part by weight of an antifoaming agent;
0.4 part by weight of dispersant;
0.2 part by weight of ultraviolet stabilizer;
0.3 part by weight of sunscreen;
12 parts by weight of zirconia microfibers;
0.5 part by weight of leveling agent; And
0.5 part by weight of flow and anti-settling agent;
Topics including; And
(B) 28 parts by weight of cycloaliphatic polyamine;
6 parts by weight of a yellowed polyisocyanate curing agent;
6.5 parts by weight of silica;
8 parts by weight of CaCO ₃ ;
0.5 part by weight of lipophilic clay powder;
0.2 part by weight of an antifoaming agent;
0.3 part by weight of dispersant;
0.5 part by weight of hydrophilic silica fine powder;
6 parts by weight of zirconia microfibers; And
0.5 part by weight of leveling agent;
Hardener
Wherein the weight ratio of the subject: curing agent is 1: 1 to 3: 1,
Epoxy equivalent of the bisphenol A epoxy resin is 180 to 195 g / eq,
The viscosity of the bisphenol A epoxy resin is 11000 to 14000 cps at 25 ℃,
The epoxy equivalent of the reactive epoxy diluent is 250 to 400 g / eq,
The average particle diameter of the silicon carbide is 300 to 500 nm,
The alumina is easily sinterable,
The average particle diameter of the alumina is 500 to 1000 nm,
The average particle diameter of the ZnO is 500 to 1000 nm,
The average particle diameter of the TiO ₂ is 100 to 300 nm,
The average particle diameter of CaCO ₃ constituting the subject is 500 to 1000 nm,
Inorganic pigments constituting the subject is Fe ₂ O ₃ ,
The average particle diameter of the hydrophilic silica fine powder is 5 to 10 nm,
The specific surface area (BET) of the hydrophilic silica fine powder is 250 to 350 m ² / g,
The average particle diameter of the lipophilic clay fine powder is 1 to 5 ㎛,
The bulk density of the lipophilic clay powder is 250 to 500 g / l,
The amine equivalent of the cycloaliphatic polyamine is 200 to 350 mgKOH / g,
The gel time of the cycloaliphatic polyamine is 30 minutes to 1 hour,
The viscosity of the yellowing-free polyisocyanate curing agent is 230 to 450 cps,
The average particle diameter of the silica is 700 to 1500 nm,
The average particle diameter of CaCO ₃ constituting the curing agent is 300 to 500 nm,
The zirconia microfibers have a length of 20 μm,
The leveling agent is a polysiloxane modified polyacrylate,
The flow and sedimentation agent is urea urethane,
The flow and antisettling agent contains lithium chloride,
Reinforcement index is 2.5 to 20, concrete structure surface protection method. As a steel structure surface protection method,
(C) applying an antirust primer to the surface of the steel structure, and
(D) applying a coating composition for waterproofing, anticorrosion and reinforcement containing nanoceramic and microfibers on the anti-rust primer,
The anti-rust primer of step (C) is applied 1 to 2 times with a thickness of 50 to 100 ㎛ per time,
Waterproofing, anticorrosion and reinforcing coating composition containing the nanoceramic and microfiber of the step (D) is applied 1 to 4 times with a thickness of 50 to 100 ㎛ per time,
The steel structure surface protection method further comprises the step of applying a top coating agent on the waterproof, anticorrosive and reinforcing coating composition containing the nanoceramic and microfiber after the step (D),
The top coating agent is applied once or twice with a thickness of 50 to 100 ㎛ per time,
The application is carried out by airless spray, brush, roller or a combination thereof,
The pressure when applied with the airless spray is 1500 to 2100 psi,
The coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfiber
(A) 38 parts by weight of bisphenol A epoxy resin;
11 parts by weight of acrylate resin;
4 parts by weight of a reactive epoxy diluent;
5 parts by weight of silicon carbide;
5 parts by weight of alumina;
5 parts by weight of silica;
ZnO 6 parts by weight;
9 parts by weight of TiO ₂ ;
CaCO ₃ 7 parts by weight;
8 parts by weight of inorganic pigments;
0.4 part by weight of hydrophilic silica fine powder;
0.4 part by weight of lipophilic clay powder;
0.1 parts by weight of an epoxy silane coupling agent;
0.2 part by weight of an antifoaming agent;
0.4 part by weight of dispersant;
0.2 part by weight of ultraviolet stabilizer;
0.3 part by weight of sunscreen;
12 parts by weight of zirconia microfibers;
0.5 part by weight of leveling agent; And
0.5 part by weight of flow and anti-settling agent;
Topics including; And
(B) 28 parts by weight of cycloaliphatic polyamine;
6 parts by weight of a yellowed polyisocyanate curing agent;
6.5 parts by weight of silica;
8 parts by weight of CaCO ₃ ;
0.5 part by weight of lipophilic clay powder;
0.2 part by weight of an antifoaming agent;
0.3 part by weight of dispersant;
0.5 part by weight of hydrophilic silica fine powder;
6 parts by weight of zirconia microfibers; And
0.5 part by weight of leveling agent;
Hardener
Wherein the weight ratio of the subject: curing agent is 1: 1 to 3: 1,
Epoxy equivalent of the bisphenol A epoxy resin is 180 to 195 g / eq,
The viscosity of the bisphenol A epoxy resin is 11000 to 14000 cps at 25 ℃,
The epoxy equivalent of the reactive epoxy diluent is 250 to 400 g / eq,
The average particle diameter of the silicon carbide is 300 to 500 nm,
The alumina is easily sinterable,
The average particle diameter of the alumina is 500 to 1000 nm,
The average particle diameter of the ZnO is 500 to 1000 nm,
The average particle diameter of the TiO ₂ is 100 to 300 nm,
The average particle diameter of CaCO ₃ constituting the subject is 500 to 1000 nm,
Inorganic pigments constituting the subject is Fe ₂ O ₃ ,
The average particle diameter of the hydrophilic silica fine powder is 5 to 10 nm,
The specific surface area (BET) of the hydrophilic silica fine powder is 250 to 350 m ² / g,
The average particle diameter of the lipophilic clay fine powder is 1 to 5 ㎛,
The bulk density of the lipophilic clay powder is 250 to 500 g / l,
The amine equivalent of the cycloaliphatic polyamine is 200 to 350 mgKOH / g,
The gel time of the cycloaliphatic polyamine is 30 minutes to 1 hour,
The viscosity of the yellowing-free polyisocyanate curing agent is 230 to 450 cps,
The average particle diameter of the silica is 700 to 1500 nm,
The average particle diameter of CaCO ₃ constituting the curing agent is 300 to 500 nm,
The zirconia microfibers have a length of 20 μm,
The leveling agent is a polysiloxane modified polyacrylate,
The flow and sedimentation agent is urea urethane,
The flow and antisettling agent contains lithium chloride,
Reinforcement index of 2.5 to 20, steel structure surface protection method. As a structure repair and reinforcement method,
(E) applying to the surface of the structure a mixture of 100 parts by weight of the coating composition for waterproofing, anticorrosion and reinforcement containing nanoceramic and microfiber and 210 to 350 parts by weight of artificial silica sand,
The waterproofing, anticorrosion and reinforcing coating composition containing the nanoceramic and microfiber and a mixture of artificial silica sand is applied to a thickness of 2 to 50 mm,
The repair and reinforcement method of the structure is to apply the coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfibers on the mixture of the waterproofing, anticorrosive and reinforcing coating composition containing the nanoceramic and microfibers and artificial silica. Include additional steps,
The waterproof, anticorrosion and reinforcement coating composition containing the nanoceramic and microfibers and the waterproof, anticorrosion and reinforcement coating composition containing the nanoceramic and microfibers are 50 to 100 μm per time. Applied 1-2 times in thickness,
The structure repair and reinforcement method is a top coating agent on the waterproof, anticorrosion and reinforcement coating composition containing nanoceramic and microfibers and a mixture of artificial silica or a waterproof, anticorrosion and reinforcement coating composition containing nanoceramic and microfibers. Further comprising the step of applying,
The top coating agent is applied once or twice with a thickness of 50 to 100 ㎛ per time,
The application is carried out by airless spray, brush, roller or a combination thereof,
The pressure when applied with the airless spray is 1500 to 2100 psi,
The coating composition for waterproofing, anticorrosion and reinforcement containing the nanoceramic and microfiber
(A) 38 parts by weight of bisphenol A epoxy resin;
11 parts by weight of acrylate resin;
4 parts by weight of a reactive epoxy diluent;
5 parts by weight of silicon carbide;
5 parts by weight of alumina;
5 parts by weight of silica;
ZnO 6 parts by weight;
9 parts by weight of TiO ₂ ;
CaCO ₃ 7 parts by weight;
8 parts by weight of inorganic pigments;
0.4 part by weight of hydrophilic silica fine powder;
0.4 part by weight of lipophilic clay powder;
0.1 parts by weight of an epoxy silane coupling agent;
0.2 part by weight of an antifoaming agent;
0.4 part by weight of dispersant;
0.2 part by weight of ultraviolet stabilizer;
0.3 part by weight of sunscreen;
12 parts by weight of zirconia microfibers;
0.5 part by weight of leveling agent; And
0.5 part by weight of flow and anti-settling agent;
Topics including; And
(B) 28 parts by weight of cycloaliphatic polyamine;
6 parts by weight of a yellowed polyisocyanate curing agent;
6.5 parts by weight of silica;
8 parts by weight of CaCO ₃ ;
0.5 part by weight of lipophilic clay powder;
0.2 part by weight of an antifoaming agent;
0.3 part by weight of dispersant;
0.5 part by weight of hydrophilic silica fine powder;
6 parts by weight of zirconia microfibers; And
0.5 part by weight of leveling agent;
Hardener
Wherein the weight ratio of the subject: curing agent is 1: 1 to 3: 1,
Epoxy equivalent of the bisphenol A epoxy resin is 180 to 195 g / eq,
The viscosity of the bisphenol A epoxy resin is 11000 to 14000 cps at 25 ℃,
The epoxy equivalent of the reactive epoxy diluent is 250 to 400 g / eq,
The average particle diameter of the silicon carbide is 300 to 500 nm,
The alumina is easily sinterable,
The average particle diameter of the alumina is 500 to 1000 nm,
The average particle diameter of the ZnO is 500 to 1000 nm,
The average particle diameter of the TiO ₂ is 100 to 300 nm,
The average particle diameter of CaCO ₃ constituting the subject is 500 to 1000 nm,
Inorganic pigments constituting the subject is Fe ₂ O ₃ ,
The average particle diameter of the hydrophilic silica fine powder is 5 to 10 nm,
The specific surface area (BET) of the hydrophilic silica fine powder is 250 to 350 m ² / g,
The average particle diameter of the lipophilic clay fine powder is 1 to 5 ㎛,
The bulk density of the lipophilic clay powder is 250 to 500 g / l,
The amine equivalent of the cycloaliphatic polyamine is 200 to 350 mgKOH / g,
The gel time of the cycloaliphatic polyamine is 30 minutes to 1 hour,
The viscosity of the yellowing-free polyisocyanate curing agent is 230 to 450 cps,
The average particle diameter of the silica is 700 to 1500 nm,
The average particle diameter of CaCO ₃ constituting the curing agent is 300 to 500 nm,
The zirconia microfibers have a length of 20 μm,
The leveling agent is a polysiloxane modified polyacrylate,
The flow and sedimentation agent is urea urethane,
The flow and antisettling agent contains lithium chloride,
Reinforcement index is 2.5 to 20, the structure repair and reinforcement method.