KR101625511B1

KR101625511B1 - Eco-friendly water soluble paints and maintenance method using the same

Info

Publication number: KR101625511B1
Application number: KR1020150184113A
Authority: KR
Inventors: 고재형
Original assignee: 고재형; (주)리콘; (주)벽산페인트; (주)그린우드
Priority date: 2015-12-22
Filing date: 2015-12-22
Publication date: 2016-05-30

Abstract

The present invention relates to an environmentally friendly and environmentally friendly process which uses H ₂ O, which has a function of converging to 0 in ODP (Ozone Depletion Potential) and GWP (global warming index), as a solvent and reduces the emission of VOCs (volatile organic compounds) The present invention relates to an environmentally friendly water-repellent coating material and a repair method using the same, which prevent corrosion of a structure by using a paint and protect it from a planned lifetime. The environmentally friendly water-soluble coating material and the repair method using the same according to the present invention can prevent the environmental pollution by reducing the content of the volatile organic compound, in conformity with the performance of the environmentally-friendly water-soluble heavy- By using the coating material, it is possible to prevent the corrosion of the structure by forming a dense and hard coating film by the chemical mechanism, and at the same time, it can protect the structure so as to serve as a planned lifetime.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water-

The present invention relates to an environmentally friendly and environmentally friendly process which uses H ₂ O, which has a function of converging to 0 in ODP (Ozone Depletion Potential) and GWP (global warming index), as a solvent and reduces the emission of VOCs (volatile organic compounds) The present invention relates to an environmentally friendly water-repellent coating material and a repair method using the same, which prevent corrosion of a structure by using a paint and protect it from a planned lifetime.

As the industry develops rapidly, various steel structures are exposed to severe corrosive environments due to the toxic gases (SO ₂ , CO ₂ , NO _x, etc.) emitted by industry and the soot and other pollution of automobiles increasing year after year. For example, the melting of iron structures is a major factor in the durability degradation of iron structures, and is a process in which the processed metal is returned to the state of stable oxidizing compounds (ores) in nature.

This is caused by attaching a rust-generating factor to the surface of the molten metal, which is caused by moisture penetrating into the oxide part of the metal to dissolve the metal and oxygen dissolved in the water oxidizes the metal. In addition, the corrosion of the coating film applied on the steel frame (the thin layer of the coating painted on the surface of the object becomes a continuous coating as the layer is dried, solidified and adhered) is often caused by aging of the coating film. It is complicated because it depends on it. Particularly, when the above structures are exposed to the sea water environment, the salt contained in seawater not only causes corrosion of the film but also promotes another aging action.

On the other hand, heavy duty coatings are used to protect steel structures exposed to marine environments such as ships, bridges, marine structures, power generation facilities, large structures of various plants, containers or other severe corrosive environments, And coatings for coating or coating thereof.

In general, a coating agent using an epoxy resin has been used as the above-mentioned heavy-duty coating material for preventing corrosion or erosion of various metals or concrete structures. However, the coating agent of the epoxy resin as described above has a strong adhesion to the base material A metallic filler such as zirconium powder is added in order to prevent corrosion and erosion along with the durability improvement. Since these fillers do not form a complete layer in the coating film, they are not completely protected from erosion and corrosion after coating, When the filler such as a metallic filler or an inert filler is added to the conventional coating agent as described above, the filler contained in the coating agent causes mechanical processing or workability Greatly falling A problem has occurred.

Therefore, in order to solve the above-mentioned problems, Patent Patent No. 10-0475557 discloses a technique in which an inert filler is added together with a metallic filler, and silica and zinc dust are used. Korean Patent Publication No. 10-0395228 Alumina, silica and the like have been filed in the related art. However, since the above-mentioned patents use the metallic filler and the inert filler together as the filler, the thermal expansion coefficients of the fillers are different from each other, There has been a problem with the phenomenon.

Accordingly, development of an inorganic filler and a heavy-duty coating material of a heavy-duty coating material capable of improving durability and durability and processability is desired.

Korean Patent No. 10-0475557 (March 14, 2005) Korean Patent No. 10-0395228 (August 21, 2003)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of preventing corrosion of a structure by using environmentally friendly paints, And to extend the life span of buildings and the like to the maximum extent. Another object of the present invention is to provide an environmentally friendly water-soluble coating material and a repair method using the same, which can be applied to a variety of buildings, civil engineering structures, and water treatment facilities.

The following drawings show examples of concrete and reinforcing steel corrosion caused by neutralization.

In order to accomplish the above object, an eco-friendly water-soluble coating material according to the present invention and a repair method using the same,

55 to 70% by weight of a water-soluble acrylic polymer obtained by reacting a polyol, a pozzolanic mineral, or a blast furnace with nano-sized powder having a size of 10 to 100 nm and water formed by passing the groundwater through the groundwater, iron oxide, talc, barium sulfate, silica, 15 to 30% by weight of a pigment comprising at least two substances selected from the group consisting of rutile, rutile, calcium carbonate, 2-fluorophenylalanine, L-5-hydroxytryptophan, 5 to 10% by weight of a diffusion film-forming agent comprising one kind selected from the group consisting of pentanoic acid, pentanoic acid and 3-amino-5-hexenoic acid, 0.1 to 1% by weight of a viscosity modifier composed of methyl ethyl ketone or n-butyl acetate, 0.5 to 2% by weight of an anti-flow agent consisting of acid or 1-propanol-2-methyl, 0.1 to 1% by weight of an antifoam and 0.1 to 1% by weight of a dispersant; And

10 to 18% by weight of a curing agent comprising 60 to 75% by weight of a polyisocyanate, at least one substance selected from the group consisting of meta-xylene diamine, isophoronediamine and diethylene triamine, 6.3 to 10% by weight of a hygroscopic agent, A second composition comprising 5.5 to 16 wt% of a viscosity modifier comprising at least one material selected from the group consisting of naphtha, methyl ethyl ketone, and xylene,

And 80 to 120 parts by weight of inorganic zinc powder is further mixed with 100 parts by weight of the first composition and the second composition in a mixing ratio of 1: 1 to 1.2.

The water-soluble acrylic polymer is produced by reacting polyacrylate polyol, pozzolanic mineral, or blast furnace stone with nano-sized powders through ground water at room temperature.

Wherein the polyisocyanate comprises at least two materials selected from the group consisting of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate trimmer, hexamethylene diisocyanate, methylene diphenyl diisocyanate, and trimethylene hexamethylene diisocyanate .

On the other hand, in the repair method using a water-

(a) conservation work steps for coating the surface of steel structures and concrete structures;

(b) a surface treatment step of applying or removing the upper part of the protective film;

(c) a high-pressure treatment step of washing the surface-treated surface with a high pressure;

(d) a priming step of firstly applying a coating material to the high pressure cleaned surface;

(e) a primary curing step of curing the primary applied surface for 18 to 24 hours;

(f) a secondary step of secondarily applying a coating material to the cured surface;

(g) a secondary curing step of curing the secondary applied surface for 18 to 24 hours; And

(h) tertiary application of a coating material onto the cured surface.

Wherein at least one abrasive selected from the group consisting of silica, shot, grit, copper reduction by-product, garnet, flint, silicon carbide and aluminum oxide is used in the surface treatment step.

After the third coating step, the thickness of the dried coating film was measured using a measuring device after complete curing, and the measured value was measured three times per measurement, and the value except for the measurement error of 5% within the range of the average value of the measuring point within the range of 60 to 250 탆 And measuring a thickness of the coating film to be measured.

The high-pressure washing step is a step of spraying the granular material mixed with the blasted blast furnace slag powder, the metal powder and the sand powder into the steel structure and the concrete structure at a high pressure.

Meanwhile, the water-soluble coating material is applied to civil engineering structures, building structures, water treatment facilities, plant facilities, and steel structures.

The environmentally friendly water-soluble coating material and the repair method using the same according to the present invention can prevent the environmental pollution by reducing the content of the volatile organic compound, in conformity with the performance of the environmentally-friendly water-soluble heavy- By using the coating material, it is possible to prevent the corrosion of the structure by forming a dense and hard coating film by the chemical mechanism, and at the same time, it can protect the structure so as to serve as a planned lifetime.

1 is a flowchart showing a procedure of a repair method using an environmentally friendly water-based paint according to a preferred embodiment of the present invention.

In one aspect of the present invention,

The water-soluble coating material

The present invention provides an environmentally-friendly water-soluble coating material comprising 80 to 120 parts by weight of inorganic zinc powder per 100 parts by weight of a mixture of the first composition and the second composition in a ratio of 1: 1 to 1.2.

According to a further aspect of the present invention,

The repair method using water-based paint

(h) a topping step of applying a coating material to the cured surface in a tertiary application step, and a repair method using the environmentally friendly waterproof coating material.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, words used in this specification and claims are not to be construed in a conventional or dictionary sense, and the inventor can appropriately define the concept of a term to describe its own invention in the best way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Most of the conventional heavy-duty coatings are solvent-based paints, and since they are applied by using thinner at the time of construction, a large amount of volatile organic compounds (VOCs) are emitted. As a result, The Ministry of Transport recommends the use of environmentally friendly waterproof coatings through the standard specification of highway bridges in 2013.

Table 1 below shows the specification standards of the environmentally friendly waterborne coating method recommended by the Ministry of Land, Transport and Maritime Affairs.

division fair Name or method of paint Recommended film thickness
(탆) Number of paintings Connector
(Inside and outside)

Surface treatment SSPC-SP10 Factory seal The first layer Water-soluble inorganic child-resistant paint 75 One system 75 Outside the bridge
Bolts and
Connector

Surface treatment
Connector SSPC-SP3 volt Zinc aluminum film treatment On-site painting

The first layer Water-soluble epoxy-based anti-corrosive paint 75 One Second layer Water-soluble epoxy-based paint 80 One Third Floor Water-soluble urethane coating 30 One Fourth floor Water-soluble urethane coating 30 One system 215 Inside the bridge
Bolts and
Connector

Surface treatment
Connector SSPC-SP3 volt Zinc aluminum film treatment On-site painting
The first layer Water-soluble epoxy-based anti-corrosive paint 75 One Second layer Water-soluble epoxy-based paint 80 One system 155 concrete
Junction

Surface treatment SSPC-SP10 Factory seal The first layer Water-soluble inorganic child-resistant paint 75 One system 75

Accordingly, the present invention overcomes the conventional technical problems and discloses an eco-friendly water-soluble coating material including excellence as described below and an invention of a repair method using the same.

ㆍ Products and methods that are similar to the performance of environment-friendly water-soluble heavy-duty paint recommended by the Ministry of Land,

ㆍ Products and methods that can reduce the content of volatile organic compounds (VOCs) and prevent environmental pollution,

ㆍ Products and methods that can protect the corrosion of the structure by forming a dense and hard coating on the chemical reaction by using the high weathering paint and protect it to the planned lifetime of the structure,

ㆍ Products and methods that can be mixed with water by using water-soluble solvent.

The coating material according to the present invention comprises a first composition comprising a water-soluble acrylic polymer, a pigment, a diffusion film forming agent, a viscosity adjusting agent, an anti-flow agent, a defoaming agent and a dispersing agent and a second composition comprising a polyisocyanate, a curing agent, a moisture absorbent and xylene . In addition, it is possible to obtain a coating material by mixing inorganic zinc powder with the mixed composition. Finally, the inorganic zinc powder is added as a mixed powder to a coating material formed of an inorganic solvent, so that zinc powder particles in the coating film The reflectance can be increased by floating, and the corrosion resistance can be obtained at the bottom.

The size of the inorganic zinc powder is suitably about 3 탆 to 8 탆, and it is most preferable to mix 80 to 120 parts by weight with respect to 100 parts by weight of the first composition and the second composition. When the content is higher than the above range, the heat reflection is improved, but the zinc powder is concentrated only in the upper layer portion, resulting in a relatively solvent reducing effect, resulting in deterioration of the coating strength and thus a phenomenon of peeling of the coating film. On the other hand, if the content is smaller than the above range, the heat radiation effect may be lost.

On the other hand, the first composition comprises 55 to 70% by weight of a water-soluble acrylic polymer obtained by reacting a polyol, a pozzolan mineral, or a blast furnace with water formed by passing ground water through a powder obtained by pulverizing the powder to a nano- 15% by weight to 30% by weight of a pigment comprising at least two substances selected from the group consisting of iron oxide, iron oxide, talc, barium sulfate, silica, kaolin, rutile, rutile, calcium carbonate, 2-fluorophenylalanine, 5 to 10% by weight of a diffusion film-forming agent comprising one kind selected from the group consisting of 5-hydroxytryptophan, 3-amino-5-phenyl-pentanoic acid and 3-amino- From 0.5% to 2% by weight of a flow inhibitor consisting of dimeric acid or 1-propanol-2-methyl, from 0.1% to 1% by weight of a defoamer, It may be made of a dispersant, 0.1% by weight to 1% by weight.

The polyol can be significantly improved in the physical properties of a coating material prepared therefrom by incorporation into a material containing hydrogen and oxygen, i.e., water. Particularly, the material obtained by the mechanism of the polyol and water has an advantage that it has a very high rigidity and a modulus is extremely high. This is because the use of a bifunctional monomer produces a polymer having a relatively high functionality, and in particular, a chemical or physical property can be improved in a water-soluble type coating material.

The water reacting with the polyol may be mixed with pozzolan powder pulverized to 10 nm to 100 nm or water having passed through the petite mineral. The pozzolan is porous and contains a large amount of various organic matter and minerals. In particular, it contains far infrared rays emitting a large amount of anions such as germanite, zirconia, zirconium, titanium oxide, aluminum oxide, cordierite, and is very effective in preventing rust from being generated in the coating film. As described above, the pozzolan powder may be preferably pulverized into nano-sized particles because the pozzolan powder has a low binding force, so that it is preferable that the pozzolana powder is pulverized into nanosized particles. On the other hand, the Pozzolan number used as a solvent for coating materials has an advantage that VOCs (volatile organic compounds) emitted from the existing coatings are remarkably low because ODP (Ozone Depletion Potential) and GWP (Global Warming Index) converge to zero .

The water-soluble acrylic polymer formed by passing the polyol and the pozzolan powder through a mechanism with water is preferably 55% by weight to 70% by weight. If it exceeds or falls below the above range, efficiency may be somewhat inferior in terms of the water resistance of the paint.

On the other hand, the water-soluble acrylic polymer can generate a chemical mechanism by reacting the polyacrylate polyol material with the Pozzolan water described above.

Alternatively, the water-soluble acrylic polymer may be obtained by copolymerizing one or more various vinyl monomers in addition to acrylamide and / or methacrylamide. Examples of such vinyl monomers may include ionic monomer hydrophilic monomers and hydrophobic monomers.

The pigment may include at least two kinds of materials selected from the group consisting of iron oxide, talc, barium sulfate, silica, kaolin, rutile, rutile, and calcium carbonate. The content of the pigment may be 15% to 30% .

The pigments themselves are guided to maintain a treated coating material in a peptized state to provide a lower viscosity and to provide a good finish appearance performance. The performance of the pigment is usually dependent and its performance can be influenced by the type of resin used and the type of solvent used.

The diffusion film forming agent is preferably 5 wt% to 10 wt%, more preferably 2-fluorophenylalanine, L-5-hydroxytryptophan, 3-amino- Hexanoic acid, and the like.

The diffusion film forming agent can increase the melting rate by lowering the fixed carbon content of the coating film and lower the melting point by increasing the fluorine content. In addition, when the above-mentioned diffusion-coated body is applied to the coating material of the present invention, it can be prevented that it is mixed with molten steel in an unmelted state, and occurrence of surface defects after finishing can be suppressed.

When the above-mentioned diffusion film-forming agent is below the above-mentioned range, the effect of the addition is insufficient, and even when the above range is exceeded, the expected effect can not be exhibited.

In addition, the diffusion film forming agent may include iron oxide, sodium oxide, potassium oxide, titanium oxide, phosphorus oxide, and manganese oxide in addition to the above components.

Preferably, the viscosity modifier is mixed in an amount of 0.1 wt% to 1 wt%, and may be composed of methyl ethyl ketone or n-butyl acetate.

If the amount of the viscosity modifier is less than 0.1 wt%, the amount of the polymer modifier formed by reaction curing is too small to sufficiently satisfy the required physical properties of the coating material, and when the amount is more than 1 wt% The amount of the polymer modifier increases, and the physical properties of the coating material can be improved. However, since the viscosity of the coating material increases, the coating material can not be applied.

The flow inhibitor may be an additive composed of dimer acid or 1-propanol-2-methyl, which is added to prevent the pigment from being precipitated or to prevent the paint from flowing during storage of the paint. At this time, it is preferable that 0.5 wt% to 2 wt% is mixed.

The defoaming agent is an additive which is added to inhibit the generation of bubbles when the coating material of the present invention is prepared or applied to a coating film. When bubbles are generated, the efficiency of the operation is lowered and the appearance is not good at the time of coating. It is suitable to add to paints. When an appropriate antifoaming agent is compounded, the surface hydrophilicity is not largely inhibited and bubble formation can be formed. Examples of suitable antifoaming agents include fluos such as siloxane antifoaming agents such as long chain fluoroalkyl-terminated siloxanes, silicone-based antifoaming agents, silicone compound antifoaming agents, silicone antifoaming agents and acrylic antifoaming agents.

The dispersant may be added in an amount of 0.1 wt% to 1 wt% as an additive added to disperse the pigment contained in the coating material of the present invention in a uniform and stable state.

Hereinafter, the second composition will be described in detail.

Wherein the second composition comprises 60 wt% to 70 wt% of a polyisocyanate, 10 wt% to 18 wt% of a curing agent comprising at least one material selected from the group consisting of meta xylene diamine, isophoronediamine, and diethylenetriamine, From about 6.3 wt% to about 10 wt%, and from about 5.5 wt% to about 16 wt% of a viscosity modifier comprising at least one material selected from the group consisting of light aromatic sulphate belts naphtha, methyl ethyl ketone, and xylene.

The polyisocyanate is a polymer made by attaching a compound of the formula R-N = C = O, and is a material whose properties vary depending on the number and method of incorporation with alkali. In the present invention, the polyisocyanate is at least two kinds selected from the group consisting of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate trimmer, hexamethylene diisocyanate, methylene diphenyl diisocyanate and trimethylene hexamethylene diisocyanate. The selection of the curing agent to be combined with the polyisocyanate can be facilitated by those skilled in the art depending on the practical use of the binder. Preferably, a curing agent comprising at least one material selected from the group consisting of meta-xylene diamine, isopentodiamine, and diethylenetriamine can be selected and used.

The curing agent of the present invention, like the coating and the adhesive, can be useful in applications requiring a relatively thin layer of cured resin. They can be used to cure a urethane resin or a mixture of these resins. The urethane resin mixture may have a liquid or solid property, and is preferably contained in an amount of from 10% by weight to 18% by weight based on the second composition.

The moisture absorbent may be prepared by pulverizing a porous material such as zeolite, natural diatomaceous earth, or natural ore to a predetermined size, washing it, heating it to a predetermined temperature, activating it, impregnating calcium chloride or the like having excellent moisture absorbency and then drying it. The desiccant of the present invention may be preferably contained in an amount of 6.3 wt% to 10 wt% with respect to the second composition.

The viscosity modifier may be contained in the range of 5.5 wt% to 16 wt% with respect to the second composition, and may include at least one substance selected from the group consisting of light aromatic sorbit naphtha, methyl ethyl ketone, and xylene . On the other hand, the viscosity modifier is a substance that increases or decreases the viscosity of a coating material, and can act as a factor that significantly affects stability, texture and usability.

If the viscosity modifier is less than 5.5 wt%, the viscosity of the coating material is decreased. If the viscosity modifier is more than 16 wt%, the viscosity of the coating material is increased.

The first composition and the second composition are mixed at a ratio of 1: 1 to 1.2, and 80 parts by weight to 120 parts by weight of the inorganic zinc powder are added to 100 parts by weight of the mixed composition to finally complete the water-soluble coating material .

On the other hand, the environmentally friendly water-repellent coating material according to the present invention is not limited to those used on the surface of steel structures and concrete structures, and can be widely applied to civil engineering structures, building structures, water treatment facilities, plant facilities and steel structures as shown in Table 2 below Can be used.

structure purpose Coverage Civil engineering structure ㆍ Anti-salt
ㆍ Neutralization prevention
ㆍ Heavy-duty painting
ㆍ Waterproof ㆍ Bridge (Con'c / Steel), Highway, Vehicle Firewall
ㆍ Tunnels, underground roads
ㆍ Underground structures such as culvert, BOX, manhole
ㆍ Coastal and port structures such as caissons and lighthouses Building structure ㆍ Neutralization prevention
ㆍ Corrosion prevention
ㆍ Waterproof ㆍ Apartment exterior wall, Al panel exterior
ㆍ Exposed concrete structure
ㆍ Stadium, gymnasium inside and outside
ㆍ Underground parking lot, wall, floor Water treatment facility ㆍ Neutralization prevention
ㆍ Waterproof
ㆍ Pollution prevention ㆍ Water and sewage facilities
ㆍ Wastewater treatment facility
ㆍ Water tank, water reservoir, water purification plant Plant facilities and
Steel structure ㆍ Corrosion prevention
ㆍ Neutralization and deterioration prevention
ㆍ Pollution prevention ㆍ Con'c / Steel storage facility
ㆍ Various mechanical equipment, transportation equipment
ㆍ Prevention of corrosion of nonferrous metal structures Other structures ㆍ Anti Slip
ㆍ Waterproof ㆍ Factory / stadium / parking lot floor finish
ㆍ Prevention of rooftop exposure

Hereinafter, a repair method using an environmentally friendly water-based paint according to the present invention will be described in detail.

First, the steps of maintenance work for treating the coating material on the surface of the steel structure and the concrete structure are carried out.

The maintenance work step is a work for blocking the inflow of dust or the like from the place around the construction site, and a protective film such as dust and dustproof net can be installed around the construction site.

Next, a surface treatment step is carried out on the upper part of the protective film, which has been subjected to the above-mentioned step, in order to apply or remove it.

The purpose of the surface treatment is to improve the corrosion resistance by inactivating (stabilizing) the surface of the substrate, to completely remove the foreign substances adhering to the surface and to improve the surface roughness, thereby enhancing the adhesion of the coating. Further, it is intended to improve the affinity and wettability between the base paper and the coating material, and to completely remove the projecting portion of the base paper to make it flat.

On the other hand, there are various kinds of operations in the surface treatment step such as chemical surface treatment or mechanical surface treatment, but it is preferable to perform mechanical surface treatment in the repair method of the present invention. Among the mechanical surface treatment methods, it can be treated by blast cleaning, and it can be used through at least one abrasive selected from the group consisting of silica sand, shot, copper reduction by-product, garnet, flint, silicon carbide and aluminum oxide.

When the surface treatment operation is completed, a high pressure cleaning step of cleaning the surface at a high pressure is performed.

The high-pressure washing step is a method of removing blast-furnace slag powder, metal powder and sand, which are pulverized into fine particles, with a view to removing oil, grease, dust, mill scale, rust, old film, oxide, corrosion products, By spraying the granular material obtained by mixing the powder with the high pressure washer, it is possible to remove the above-mentioned foreign substances and the like.

When the high-pressure washing step is completed, the coating material can be divided into three parts, namely, the lower part, the middle part and the upper part, and the coating material can be applied using a brush, a roller and a sprayer. At this time, when the coating material is applied three times, it must be cured for 18 hours to 24 hours at intervals between the application of the coating material. The curing time is preferably 18 hours to 24 hours, but the curing time may be adjusted according to the site conditions.

Additionally, the coating thickness checking step may be performed after all of the above steps have been completed. In the step of inspecting the film thickness, the thickness of the dried film is measured using a measuring device after complete curing after completion of coating, and the measurement error is measured 5 times in the range of 60 to 250 mu m, It is possible to measure the remaining values except for the measurement error.

If the average value of the measurement points is out of the range of 60 탆 to 250 탆 in the step of inspecting the film thickness, the defective portion of the coating surface such as the flow of the coating film is checked, and the defective portion is roughened by using a sandpaper or a power tool, It is possible to carry out the process of painting. Further, in order to confirm the adhesion state of the coating film of the material, it is preferable to check the surface coating state such as the swelling of the film, the discoloration, the crack, the peeling, .

Hereinafter, the present invention will be described more specifically by way of Examples and Experimental Examples.

However, the scope of the present invention is not limited by the examples and experimental examples described below.

Example 1: Preparation of first composition

700 g of a water-soluble acrylic polymer obtained by reacting water formed by passing ground water through finely pulverized ground pozzolan powder with a polyacrylate polyol, 250 g of a mixture of barium sulfate and anatase, 10 g of 3-amino-5-hexenoic acid, 8 g of a viscosity modifier consisting of n-butyl acetate, 12.2 g of a flow inhibitor consisting of dimer acid, 10 g of a defoamer and 10 g of a dispersant were placed in a stirrer and stirred at 650 rpm for about 30 minutes to prepare a first composition.

Raw material Weight (g) Water-soluble acrylic polymer 700 A mixture of barium sulfate and anatase 250 Diffusion film forming agent 75 Viscosity modifier 8 Flow inhibitor 12.2 Defoamer 10 Dispersant 10

Example 2: Preparation of second composition

650 g of a polyisocyanate composed of hexamethylene diisocyanate, 150 g of a curing agent composed of diethylenetriamine, 80.5 g of a hygroscopic agent, and 122.8 g of a viscosity adjusting agent consisting of methyl ethyl ketone were sequentially added into a stirrer and stirred at 650 rpm for about 45 minutes to obtain a second composition .

Raw material Weight (g) Polyisocyanate 650 Hardener 150 Absorbent 80.5 Viscosity modifier 122.8

Example 3: Water-soluble paint finish

The first and second compositions prepared in Examples 1 and 2 were mixed at a ratio of 1.0: 1.2, and 0.94 kg of inorganic zinc powder was stirred in a stirrer at 700 rpm for about 20 minutes to 1.2 kg of the mixed composition. Finally, the coating material was completed.

Raw material Weight (kg) Mixed composition
(First composition + second composition) 1.2 Inorganic zinc powder 0.94

Experimental Example 1: Performance and quality requirements Suitability exam

In order to objectively confirm whether the performance and quality requirements of the water-soluble coating material prepared in Examples 1 to 3 conformed to the above, the product was submitted to a Quality Assurance Manager, and the results are shown in Table 6 below .

Inspection items unit Inspection Specification result State of dry film - No more clear Condition in container - No more clear color - No more clear importance - 1.1 or higher 1.19 Non-volatile matter % 40 or more 43.5 VOCs content g / L Below 80 48 Softening degree ㎛ 6 or more 10 Polish - 70 or more 92 Drying time hr 24 or less 8 Housework time hr 2 or more 4 Flowability ㎛ 200 or more 340 Concealment rate % over 90 98 Accelerated weathering (300h) % over 90 97 lead K.U More than 80 86

As shown in Table 6 above, it can be confirmed that the coating material of the present invention among the 14 inspection items has derived test results in accordance with the inspection standard in all the items, or more excellent performance.

More specifically, the analysis of the above table showed that the dry film condition, condition and color in the container satisfied all of the specifications required by the inspection standard, and the specific gravity was 1.19, exceeding 1.1 or more, showing very good results. In addition, the nonvolatile matter, ie, the evaporation residue test items measured under the prescribed test conditions, was 43.5%, far exceeding the reference value of more than 40%, which showed good results in the inspection of the nonvolatile matter (solid matter).

Further, the result of 43.5 g / L of the VOCs content (volatile organic compound) was also found to be much smaller than the reference value of 80 g / L. As a result, the coating material of the present invention can prevent environmental pollution Can be confirmed objectively.

In addition, the result of gloss, drying time, pot life, flowability, concealment, accelerated weathering, and main inspection shows a better result than the reference value, so that the excellence of the coating material of the present invention can be objectively confirmed.

The following test reports are issued to the Quality Assurance Manager for compliance with performance and quality requirements.

While the present invention has been described with reference to the particular embodiments and drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

In the water-soluble coating material,
The coating material
55 to 70% by weight of a water-soluble acrylic polymer obtained by reacting a polyol, a pozzolanic mineral, or a blast furnace with nano-sized powder having a size of 10 to 100 nm and water formed by passing the groundwater through the groundwater, iron oxide, talc, barium sulfate, silica, 15 to 30% by weight of a pigment comprising at least two substances selected from the group consisting of rutile, rutile, calcium carbonate, 2-fluorophenylalanine, L-5-hydroxytryptophan, 5 to 10% by weight of a diffusion film-forming agent comprising one kind selected from the group consisting of pentanoic acid, pentanoic acid and 3-amino-5-hexenoic acid, 0.1 to 1% by weight of a viscosity modifier composed of methyl ethyl ketone or n-butyl acetate, 0.5 to 2% by weight of an anti-flow agent consisting of acid or 1-propanol-2-methyl, 0.1 to 1% by weight of an antifoam and 0.1 to 1% by weight of a dispersant; And
10 to 18% by weight of a curing agent comprising 60 to 75% by weight of a polyisocyanate, at least one substance selected from the group consisting of meta-xylene diamine, isophoronediamine and diethylene triamine, 6.3 to 10% by weight of a hygroscopic agent, A second composition comprising 5.5 to 16 wt% of a viscosity modifier comprising at least one material selected from the group consisting of naphtha, methyl ethyl ketone, and xylene,
Wherein the inorganic zinc powder is further blended with 80 to 120 parts by weight of 100 parts by weight of a mixture of the first composition and the second composition in a ratio of 1: 1 to 1.2.

The method according to claim 1,
Wherein the water-soluble acrylic polymer is prepared by reacting water formed by passing polyacrylate polyol, pozzolan mineral, or blast furnace through nano-sized powder through ground water at room temperature.

The method according to claim 1,
Wherein the polyisocyanate comprises at least two materials selected from the group consisting of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate trimmer, hexamethylene diisocyanate, methylene diphenyl diisocyanate, and trimethylene hexamethylene diisocyanate Which is an environmentally friendly water-soluble coating material.

The repair method using the water-soluble coating material according to claim 1,
(a) conservation work steps for coating the surface of steel structures and concrete structures;
(b) a surface treatment step of applying or removing the upper part of the protective film;
(c) a high-pressure treatment step of washing the surface-treated surface with a high pressure;
(d) a priming step of firstly applying a coating material to the high pressure treated surface;
(e) a primary curing step of curing the primary applied surface for 18 to 24 hours;
(f) a secondary step of secondarily applying a coating material to the cured surface;
(g) a secondary curing step of curing the secondary applied surface for 18 to 24 hours; And
(h) a topping step of applying a coating material to the cured surface in a tertiary application step.

5. The method of claim 4,
Wherein at least one abrasive selected from the group consisting of silica, shot, grit, copper reduction by-product, garnet, flint, silicon carbide and aluminum oxide is used in the surface treatment step.

5. The method of claim 4,
After the third coating step, the thickness of the dried coating film was measured using a measuring device after complete curing, and the measured value was measured three times per measurement, and the value except for the measurement error of 5% within the range of the average value of the measuring point within the range of 60 to 250 탆 And a coating film thickness measuring step of measuring the thickness of the coating film.

5. The method of claim 4,
Wherein the high-pressure treatment step comprises spraying high-pressure water onto the surfaces of the steel structure and the concrete structure, wherein the granular material obtained by mixing the blast-furnace slag powder, the metal powder and the sand powder pulverized into fine particles is sprayed at a high pressure. .

5. The method of claim 4,
Wherein the water-soluble coating material is applied to civil engineering structures, building structures, water treatment facilities, plant facilities, and steel structures.