KR102384251B1 - Coating composition for steel structures and concrete structures to which a hydrophilic organic-inorganic composite dispersion compatible with water-based resins, the manufacturing method and surface coating method using the same - Google Patents

Abstract

A coating composition for a steel structure and a concrete structure using a hydrophilic organic-inorganic complex dispersion compatible with a water-based resin, a manufacturing method thereof, and a surface painting method using the same according to the present invention apply a dispersion that can be applied regardless of resin type (epoxy, urethane, alkyd, acrylic type) and use (undercoat agent, intermediate agent, top coat agent), can prevent problems such as poor compatibility, uneven physical properties of a coating film that may occur during manufacturing based on a high-temperature homogenization process of the dispersion, and can manufacture a stabilized coating film by being configured based on the high-temperature homogenization process to have effects such as securing physical properties, securing price competitiveness, etc.

Description

Coating composition for steel structures and concrete structures to which a hydrophilic organic-inorganic composite dispersion compatible with water-based resins is applied, a manufacturing method therefor, and a surface coating method using the same with water-based resins, the manufacturing method and surface coating method using the same}

The present invention relates to a coating composition for a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with a water-based resin is applied, a manufacturing method thereof, and a surface coating method using the same. A coating composition for steel structures and concrete structures to which a hydrophilic organic-inorganic composite dispersion is applied, which has excellent compatibility with water-based resins such as resins and alkyd resins and can be applied to any use as a primer, intermediate, or top coat, a method for manufacturing the same, and a method for manufacturing the same It is a technical field related to the surface coating method used.

In a situation where air pollution is aggravated by sulfur dioxide and hydrogen sulfide, which are pollutants in the air, the application of paints with a high content of volatile organic compounds (VOCs) is exacerbating such air pollution. For this reason, the demand for water-soluble coating materials is increasing.

The water-soluble coating material contains more raw materials than general oil-based coating materials. Various additives such as a dispersant for dispersing the pigment and a fluidity control agent for paint storability are being applied, so it is difficult to maintain the balance of the additives in the paint.

In particular, a small amount of additives added in the painting process may cause difficulty in completely uniforming in the paint manufacturing process, and may cause an increase in the amount of additives to be added to reinforce the deteriorated physical properties in a state where they are not uniformly mixed. The increase in the input amount due to the non-uniform mixability sometimes causes a decrease in competitiveness due to the improvement of the coating agent price, and the physical properties of the coating film show a slight difference in color and bubble marks, but furthermore, it causes a fatal deterioration of the coating film durability such as cracks and blistering of the coating film. also indicate In addition, some additives may react with some raw materials in the input process to generate seeds, so it is essential to consider the process input order.

Epoxy, urethane, alkyd, and acryl-type resins inevitably contain coloring pigments, extender pigments, and additives in order to be completed as a coating film that exhibits optimal physical properties. In the preparation of the composition, it is necessary to select an additive compatible with each resin, and it is always important to select an optimal content and design a process to exhibit optimal physical properties.

In addition, the paint is applied according to each use, and the system of the undercoat, the middle coat, and the top coat is a representative anticorrosive system. For the undercoat, paint that exhibits effects such as adhesion to materials and rust prevention is applied. The middle coat is a paint that secures adhesion between the primer and top coat and reinforces the thickness of the film. The top coat is a paint developed to suit the field conditions such as splendid appearance, luster, durability, and weather resistance. In the coating composition for each of these applications, additives suitable for each application must be selected.

Additives applied to the above types and uses exhibit the best physical properties when uniformly mixed, and can exhibit constant quality. The most important thing in the coating composition is that the selection and input amount of additives to be added for the target quality should be set correctly. In general, additives are added for the purpose of removing bubbles, dispersing pigments, and enhancing the flow resistance of paints.

For example, in a general paint manufacturing process, air bubbles are easily introduced, and it is an antifoam agent to control such air bubbles. In the case of an antifoaming agent, when less than an appropriate amount is added, bubbles are still observed in the coating composition, and when an appropriate amount is added, appearance defects such as cratering occur. As such, there is an appropriate amount of additives, and when it is exceeded, physical properties are deteriorated. This applies equally to other additives other than the antifoaming agent.

In the case of dispersants, they are also divided into organic and inorganic dispersants according to their respective uses, and they adsorb on the pigment surface to prevent re-aggregation of the pigment by electrostatic repulsion or steric hindrance effect. When an appropriate amount of dispersant is set for the pigment, an optimal dispersing effect can be obtained, but an excessive amount causes the dispersant particles remaining without being bound to the pigment to exist in the coating composition, which in turn can reduce the durability of the coating film as foreign substances. can

Republic of Korea Patent No. 10-1907054 (October 04, 2018)

The present invention is a technology devised to solve the problems according to the above-described prior art, and is a process for manufacturing a water-soluble paint with a low content of volatile organic compounds (VOC) that generates air pollutants, while manufacturing the same The main purpose is to provide an efficient coating composition and surface coating method for steel structures and concrete structures by adding a process of making a medium hydrophilic organic/inorganic composite dispersion to enable efficient production of a coating composition exhibiting optimal physical properties. .

The present invention in order to realize the desired object as described above, a water-soluble epoxy resin; titanium dioxide; Any one or a plurality of extender pigments selected from mica, silica, talc, sericite, kaolin, and silicic anhydride; Any one or a plurality of rust preventives selected from the group consisting of strontium chromate, calcium chromate, barium chromate, zinc potassium chromate, zinc chromate tetrabasate, zinc powder, zinc phosphate, organic nitro compound zinc salt, calcium silicate, trilead tetraoxide, and potassium zinc pigment; And organic dispersing agent, inorganic dispersing agent, fluidity regulator, defoaming agent, any one or a plurality of additives selected from water; It provides a coating composition for steel structures and concrete structures to which a hydrophilic organic/inorganic composite dispersion compatible with a water-based resin is applied. .

In addition, the fluidity regulator of the present invention is characterized in that it comprises any one or a plurality of selected from silica-based, organoclay-based, cellulose polymer.

In addition, the antifoaming agent of the present invention is any one or a plurality of hydrophilic groups, silicone-based, mineral oil-based, fatty acids, higher alcohols, minerals, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica and perfluoroalkyl groups It is characterized in that it comprises a.

In addition, the coating composition of the present invention is a mixture of 5 to 20 parts by weight of an organic dispersant, 5 to 20 parts by weight of an inorganic dispersant, 5 to 15 parts by weight of a fluidity modifier, 1 to 20 parts by weight of an antifoaming agent, and 40 to 80 parts by weight of water. It is characterized in that it comprises a mixture;

In addition, the first mixture is characterized in that it is mixed for 45 minutes to 1 hour at 30 to 70 ℃ at 1000 to 1500 rpm.

In addition, the coating composition includes 5 to 20 parts by weight of the first mixture, 15 to 45 parts by weight of a water-soluble epoxy resin, 5 to 15 parts by weight of titanium dioxide, 5 to 30 parts by weight of an extender, and 5 to 65 parts by weight of water. It is characterized in that it comprises;

In addition, the coating composition comprises 5 to 30 parts by weight of the first mixture, 15 to 45 parts by weight of a water-soluble epoxy resin, 5 to 15 parts by weight of titanium dioxide, 5 to 30 parts by weight of an extender, and 5 to 65 parts by weight of water. It is characterized in that it comprises;

In addition, the coating composition is a top coat comprising 5 to 30 parts by weight of the first mixture, 15 to 55 parts by weight of a water-soluble epoxy resin, 15 to 25 parts by weight of titanium dioxide, 1 to 10 parts by weight of an extender, and 15 to 60 parts by weight of water It is characterized in that it comprises;

In addition, the method for preparing a coating composition for a steel structure and a concrete structure to which a hydrophilic organic/inorganic composite dispersion compatible with a water-based resin is applied is an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water. first preparation stage; A homogenization step of homogenizing the first mixture by mixing the organic dispersant, the inorganic dispersant, the fluidity regulator, the defoaming agent, and water prepared in the first preparation step at a temperature of 30 to 70°C; a second preparation step of preparing an epoxy resin, titanium dioxide, an extender pigment, and a rust preventive pigment; A primer preparation step of preparing a primer by mixing an epoxy resin, titanium dioxide, an extender pigment, and a rust preventive pigment with the first mixture; a middle agent manufacturing step of mixing an epoxy resin, titanium dioxide, an extender pigment, and a rust preventive pigment with the first mixture to prepare a middle agent; A third preparation step of preparing a urethane resin, titanium dioxide, a coloring pigment, and an extender pigment; and a topcoat preparation step of preparing a topcoat by mixing a urethane resin, titanium dioxide, a coloring pigment, and an extender pigment with the first mixture; It is characterized in that it comprises a.

In addition, the surface coating method using a coating composition for steel structures and concrete structures to which a hydrophilic organic/inorganic composite dispersion compatible with water-based resins is applied is cleaned of surface foreign substances on the steel structures and concrete structures so that the coating composition can be applied. a surface treatment step; After the surface treatment step, an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water are mixed with the first mixture mixed with an epoxy resin, titanium dioxide, an extender pigment, and a rust preventive pigment to the concrete structure. ; After the step of applying the primer layer, a drying step of drying the primer layer for 1 to 12 hours; An intermediate agent layer coating step of applying an intermediate agent composed of mixing an epoxy resin, titanium dioxide (TiO 2 ), an extender pigment, and a rust preventive pigment to a first mixture of an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water; After the intermediate agent layer application step, the intermediate agent layer drying step of drying the intermediate agent layer for 1 to 12 hours; An organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and a top coat layer application step of applying a top coat composed of mixing a urethane resin, titanium dioxide, a coloring pigment, and an extender pigment to a first mixture mixed with water; and a topcoat layer drying step of drying the topcoat layer for 1 to 12 hours after the step of applying the topcoat layer.

The coating composition for steel structures and concrete structures to which the hydrophilic organic/inorganic composite dispersion compatible with the aqueous resin according to the present invention presented as described above is applied, the manufacturing method thereof, and the surface coating method using the same are the resin types (epoxy, urethane, alkyd, acrylic). type) and use (base coater, intermediate coater, top coater), apply a dispersion that can be applied without distinction has the effect of preventing

In addition, the coating composition for steel structures and concrete structures to which the hydrophilic organic/inorganic composite dispersion compatible with the water-based resin according to the present invention is applied, the manufacturing method thereof, and the surface coating method using the same are based on a high-temperature homogenization process, and thus a stabilized coating film can be manufactured, so there are effects such as securing physical properties and securing price competitiveness.

1 is a flowchart sequentially showing a method for manufacturing a coating composition for a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with a water-based resin according to a preferred embodiment of the present invention is applied.
2 is a flowchart sequentially showing a surface coating method using a coating composition of a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with an aqueous resin according to a preferred embodiment of the present invention is applied.

The present invention is a water-soluble epoxy resin; titanium dioxide; Any one or a plurality of extender pigments selected from mica, silica, talc, sericite, kaolin, and silicic anhydride; Any one or a plurality of rust preventives selected from the group consisting of strontium chromate, calcium chromate, barium chromate, zinc potassium chromate, zinc chromate tetrabasate, zinc powder, zinc phosphate, organic nitro compound zinc salt, calcium silicate, trilead tetraoxide, and potassium zinc pigment; And an organic dispersant, an inorganic dispersant, a fluidity regulator, an antifoaming agent, any one or a plurality of additives selected from water; a method for manufacturing steel structures and concrete structures to which a hydrophilic organic/inorganic composite dispersion compatible with an aqueous resin is applied The surface coating method will be described in more detail. However, the embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

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

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

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

Hereinafter, a coating composition for a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with various water-based resins according to a preferred embodiment of the present invention is applied, a manufacturing method thereof, and a surface coating method using the same will be described in detail as follows.

The aqueous resin, which is a component of the present invention, is

It may be composed of any one or a plurality of epoxy resins, urethane resins, alkyd resins, and acrylic resins.

As the epoxy resin, an epoxy resin commonly used in the field to which the present invention belongs may be used, and a general epoxy resin, an epoxy resin containing chlorine, or a mixture thereof may be used.

The epoxy resin has excellent water resistance and chemical resistance, has high storage stability, and can be stored for a long period of time regardless of climate and temperature when a curing agent is not mixed.

As the urethane resin, a urethane resin commonly used in the field to which the present invention belongs may be used, and a two-component polyurethane resin, a heat-curable urethane resin, a moisture-curable polyurethane resin, a rheological polyurethane resin, and the like may be used.

The urethane resin dries quickly and exhibits excellent weather resistance, durability, and UV stability even under external exposure conditions, and is eco-friendly because it is water-soluble.

As the alkyd resin, an alkyd resin commonly used in the field to which the present invention belongs may be used, and a water-soluble alkyd resin synthesized by adding an amine for neutralization and water solubility to an ester compound composed of a higher fatty acid, a polybasic acid and a polyhydric alcohol may be used. can

As the acrylic resin, acrylic resins commonly used in the field to which the present invention belongs may be used, and thermosetting acrylic resins (solution type, non-water dispersion type, aqueous solution type, water dispersion type, solid resin type, liquid solvent free type), thermoplastic acrylic resin , acrylic emulsion resin, etc. can be used.

The acrylic resin is preferably a water-soluble acrylic resin in order to prevent the surface to be protected, such as concrete, from being exposed to the outside to provide salt damage, neutralization prevention, and waterproof/corrosive performance.

In addition, the water-based resin may be used by mixing one or more types of materials commonly used in the field to which the present invention belongs, such as an epoxy resin, a urethane resin, an alkyd resin, an acrylic resin, a silicone resin, and a vinyl resin.

The body pigment, which is a component of the present invention, is

Mica, talc, silica, calcium carbonate, barium sulfate, and may be configured to include any one or a plurality of selected from clay.

In addition, the extender pigment appears white like a white pigment on the surface, but becomes almost transparent when mixed with oil or resin and cannot show color. , there are effects such as improvement of water resistance.

The mica (MICA) is a kind of mineral whose main component is alumina silicate, also called mica, has good insulation and heat insulation effects, and can reflect and absorb at the same time, so it is a pigment that changes color depending on the viewing angle, silver mica, Interference mica, combination mica, iron oxide mica, etc. can be used.

In addition, it is preferable to use the mica having a particle size of 5 to 30 μm (micrometer). Since adhesion may be reduced, it is preferable to use a particle having a particle size within the above range.

The silica is a silicate mineral, called silicon dioxide and silicic anhydride, and both natural silica and synthetic silica can be used. It is also widely used for various purposes such as binders.

The talc is a secondary modified mineral produced by metamorphism of olivine, pyroxene, persimmonite, and magnesium silicate, and has various colors such as white, light blue, green gray, yellow, pink, brown, and black gray. It is used to improve filling and strength because it has excellent adhesion, water absorption (oil absorption), electrical insulation and thermal properties.

The calcium carbonate is produced by pulverizing coal stone, is easily soluble in inorganic acids, is inexpensive, and is mainly used as an extender pigment, is also used as a white pigment and water-based paint, and has excellent heat of dissolution, hygroscopicity, and water holding properties Used to improve strength.

The barium sulfate is produced by pulverizing barite, is stable to air, heat, acid and alkali, and is used as a gloss improvement, fluidity control, agglomeration inhibitor, etc., and is used to improve abrasion resistance, durability, filling effect and thickening effect.

The white clay has silicon dioxide and aluminum oxide as main components, is called kaolin, is insoluble in acids and alkalis, is used for extender pigments of lake pigments, water-based paints, etc., and is used to improve hardness, impact resistance, rust resistance, etc. do.

In connection with the above, the amount of the extender pigment is preferably 15 to 25% by weight based on the total weight of the coating composition. If it is less than 15% by weight, the coating film hardness of the coating film may decrease, and if it exceeds 25% by weight, leveling may decrease, so it is preferable to be added within the above range.

The rust preventive pigment, which is a component of the present invention, is

It may be configured to include any one or a plurality selected from the group consisting of zinc phosphate, zinc powder, aluminum paste, and iron oxide.

In addition, the anti-corrosion pigment is a pigment having a function of preventing corrosion by causing a chemical reaction to form a rust-preventing film on the metal surface or by suppressing a chemical reaction between a metal and a solution causing corrosion, and passivates the metal surface ( passivation) to prevent corrosion.

The zinc phosphate is a pigment that has recently been spotlighted as a non-toxic rust-preventive pigment instead of chromium or lead-based rust-preventive pigments, whose main component is Zn ₃ (PO4) ₂ ·nH ₂ O (n=0, 2, 4). Because of its low activity and good storage stability, it is a white rust-preventing pigment that can be applied to enamel as well as water-soluble and emulsion paints.

The zinc powder (zinc powder) is a gray powder containing metallic zinc as a main component, and has excellent electrochemical rust film effect on iron and is a non-toxic pigment.

The zinc powder is not particularly limited, but it is preferable to use a zinc powder having a metal zinc content of 95% or more, an average particle size of zinc particles of 5 to 7 μm, and an oil absorption amount of 5 to 7%, and a metal zinc content of 95% %, the average particle size is less than 5㎛, and the oil absorption is less than 5%, the corrosion resistance may be lowered and the rust prevention effect may not appear properly. Since it may not be obtained properly, it is preferable to use one having the above range.

The aluminum paste has a silvery-white thin plate shape containing metal aluminum as a main component, and when applied to the surface of a concrete or steel structure, forms a multi-layer structure parallel to the surface. Eggplant is a pigment.

The iron oxide has colors such as red, yellow, yellow, high oil absorption, hydrophilicity, and is a pigment that prevents corrosion of iron materials by adding chemically limited oxides.

In addition, the rust preventive pigment can be used by further mixing any one or a plurality of selected from calcium silica, organic nitro compound zinc salt, and Gwangmyeongdan, and when used in a severe corrosive environment or by further mixing a chromium-based rust preventive pigment as needed. can be used

The additive which is a component of the present invention is

It may be configured to include any one or a plurality of organic dispersants, inorganic dispersants, fluidity regulators, defoamers, and water.

The organic dispersing agent is a silicone-based emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, and solid polyester derivative (for example, polysiloxane), lecithin, fatty acid with good non-aggregation, fluidity, and preservation stability and its salt, alkylphenol ethoxylate, etc. can be used to improve the dispersibility of the pigment.

Titanium dioxide may be used as the inorganic dispersant, and dispersibility of the pigment may be improved.

The titanium dioxide is manufactured according to the chloride process and the sulfate process, and white titanium dioxide can be used. It is strong, has good coloring and hiding power.

In addition, the titanium dioxide improves the thermal and physical strength of the coating composition, prevents abrasion, improves tear strength, improves corrosion resistance, improves weather resistance, improves gloss, improves adhesion performance, and aging of the coating composition by long-term exposure to high temperature Alternatively, it is possible to increase the heat shielding function by preventing deterioration.

In addition, the titanium dioxide is an eco-friendly component that is harmless to the human body, and has effects such as ultraviolet light absorption function, antibacterial action, air purification, odor removal, gas release, and water purification.

The fluidity modifier may include any one or a plurality of silica-based, organic clay-based, and cellulose polymers.

The fluidity modifier allows the coating composition to exhibit a thixotropy behavior instead of Newtonian motion, prevents precipitation of the coating composition, and gives a viscosity lowering effect during stirring It is used for the purpose of imparting leveling properties during painting. .

The silica-based fluidity regulator is a material containing silica, and acts like an agglomerate wetting and dispersing agent, and as it reacts with other additives to form a closer network structure, thixotropic properties increase.

As an example of the silica-based fluidity modifier, BYK Additives & Instruments (company name), BYK-405 (product name), BYK-410 (product name), and BYK-411 (product name) may be used.

The organoclay-based fluidity regulator is a clay-based material, and serves to prevent precipitation and facilitate dispersion of non-polar and medium-polar oil-based paints.

As an example of the organoclay-based fluidity regulator, 'Uni-Materials Co., Ltd.' (company name), CLAYTONE 40 (product name), CLAYTONE AF (product name), CLAYTONE APA (product name), CLAYTONE HT (product name), CLAYTONE HY (product name) ) can be used.

The cellulose polymer fluidity modifier is a nonionic water-soluble polymer, which can prevent brush marks, roller marks, orange peel, craters, pinholes, and color stains after painting, and has good adhesion, water retention, and durability.

As an example of the cellulose polymer fluidity modifier, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, methyl hydroxyethyl cellulose, and cellulose acetate butyrate may be used.

The antifoaming agent may include any one or a plurality of hydrophilic groups, silicone-based, mineral oil-based, fatty acid-based, higher alcohol-based, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica, and perfluoroalkyl groups. there is.

The anti-foaming agent is added to prevent the occurrence of air bubbles or to quickly remove air bubbles from the surface where air bubbles are generated, because when air bubbles are generated during painting, work efficiency is lowered and the appearance is also affected.

The antifoaming agent comprises at least one selected from a hydrophilic group, silicone-based, mineral oil-based, fatty acid-based, higher alcohol-based, mineral-based, higher fatty acid glycerite, dimethyl polysiloxane, polypropylene glycol, hydrophobic silica, and perfluoroalkyl antifoaming agents. can be

The hydrophilic group refers to an atomic group of a material having a strong affinity for water and a property of being easily soluble in water, and generally corresponds to a polar or ionic material. The ionic hydrophilic group includes a sulfuric acid group, a sulfonic acid group, a carboxylic acid group, and the like, and the nonionic hydrophilic group includes a hydroxyl group and an amide group.

The silicone-based material is a material made by attaching a silicone component to a reactor of polyurethane, and refers to silicone having both physical and chemical advantages of urethane and silicone. Paintability, non-shrinkage, non-staining, little change by weather and temperature, and good UV resistance.

The mineral oil is a colorless, odorless, tasteless mineral oil, which is a by-product generated in the process of refining petroleum, and the main components are alkane and paraffin, and act as a carrier for additives.

The higher alcohol refers to a substance having a hydroxyl group in a molecule and having 6 or more carbon atoms. When the number of carbon atoms is 6 to 10, it exists in a liquid state at room temperature and can be used for increasing the viscosity and stability of the formulation.

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

Dimethyl polysiloxane is a silicone-based organic polymer that has strong viscosity, chemical resistance, stability against humidity and temperature changes, inertness, non-toxicity, and non-flammability.

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

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

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

The water is added so that the additives are mixed well, and it is preferable to use ion-exchanged water rather than general water to prevent chemical and physical reactions, and the amount of water added is 10 to 20% by weight based on the total weight of the composition. Preferably, if added in less than 10%, precipitation of the coating composition may occur, and if it exceeds 20% by weight, layer separation of the coating composition may occur, so it is preferable to add within the above range.

In addition, the coating composition may include a dispersion in which 1 to 30 parts by weight of an organic dispersant, 1 to 30 parts by weight of an inorganic dispersant, 1 to 30 parts by weight of a fluidity modifier, and 1 to 20 parts by weight of an antifoaming agent are mixed with respect to 100 parts by weight of water. can

The dispersion may be used regardless of the type of resin such as an epoxy resin, a urethane resin, an alkyd resin, or an acrylic resin, or a base coater, a middle coater, and a top coater.

The organic dispersant and the inorganic dispersant are preferably added in an amount of 1 to 30 parts by weight based on 100 parts by weight of water. If it is less than 1 part by weight, problems may occur in that leveling, flowability, and dispersibility of the dispersion are lowered, and if it exceeds 30 parts by weight, bubbles may be generated, so it is preferable to be added within the above range.

The fluidity modifier is preferably added in an amount of 1 to 30 parts by weight based on 100 parts by weight of water. When the amount is less than 1 part by weight, when the dispersion is stored for a long time, the pigment may settle or flowability may decrease. It is preferable to be

The antifoaming agent is preferably added in an amount of 1 to 20 parts by weight based on 100 parts by weight of water. When it is less than 1 part by weight, it is difficult to suppress the occurrence of bubbles, and when it exceeds 20 parts by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to use it within the above range.

In addition, the coating composition includes a primer in which 1 to 30 parts by weight of the dispersion, 10 to 300 parts by weight of the aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender are mixed with respect to 100 parts by weight of water. can be configured.

The primer adsorbs dust on the surface of the concrete structure or steel structure, and can increase the adhesion of the intermediate agent because it can enhance the adhesion of the paint.

The dispersion is preferably added in an amount of 1 to 30 parts by weight based on 100 parts by weight of water. When it is less than 1 part by weight, it cannot be used for various aqueous resins such as epoxy resins, urethane resins, alkyd resins, and acrylic resins. it is preferable

The aqueous resin is preferably added in an amount of 10 to 300 parts by weight based on 100 parts by weight of water. When it is less than 10 parts by weight, it is difficult to disperse in water, and when it exceeds 300 parts by weight, there is no effect change due to excessive input and it is uneconomical, so it is preferable to be added within the above range.

The titanium dioxide is preferably added in an amount of 10 to 200 parts by weight based on 100 parts by weight of water. If it is less than 10 parts by weight, chemical resistance, gloss, weather resistance, corrosion resistance, etc. may be reduced, and if it exceeds 200 parts by weight, it is not economical because there is no effect change due to excessive input. It is preferable to be added within the above range.

The extender pigment is preferably added in an amount of 1 to 35 parts by weight based on 100 parts by weight of water. When it is less than 1 part by weight, strength, adhesion, moisture resistance, water resistance, etc. may be reduced, and when it is less than 35 parts by weight, it is not economical because there is no change in the effect due to excessive input, it is preferable to be added within the above range.

In addition, the coating composition contains 1 to 30 parts by weight of the dispersion, 10 to 300 parts by weight of the aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender based on 100 parts by weight of water. can be configured.

The intermediate agent supplements the durability by reinforcing the coating film thickness of the coating agent, and has the effect of supplementing the adhesion between the undercoat agent and the topcoat agent.

The dispersion is preferably added in an amount of 1 to 30 parts by weight. When it is less than 1 part by weight, the adhesion between the primer and the top coat cannot be compensated, and when it exceeds 30 parts by weight, it is not economical because there is no effect change due to excessive input, so it is preferable to be added within the above range.

As the water-based resin, various water-based resins such as epoxy resins, urethane resins, alkyd resins, and acrylic resins may be used. The water-based resin may be used alone or in combination, and has good abrasion resistance, water resistance, chemical resistance, storage stability, workability, and the like.

The aqueous resin is preferably added in an amount of 10 to 300 parts by weight based on 100 parts by weight of water. If it is less than 10 parts by weight, the workability may deteriorate due to deterioration of abrasion resistance, water resistance, chemical resistance, storage stability, etc., and if it exceeds 300 parts by weight, there is no effect change due to excessive input and it is uneconomical. desirable.

The titanium dioxide is preferably added in an amount of 10 to 200 parts by weight based on 100 parts by weight of water. If it is less than 10 parts by weight, chemical resistance, gloss, weather resistance, corrosion resistance, etc. may be reduced, and if it exceeds 200 parts by weight, it is not economical because there is no effect change due to excessive input. It is preferable to be added within the above range.

The extender pigment is preferably added in an amount of 1 to 35 parts by weight based on 100 parts by weight of water. When it is less than 1 part by weight, strength, adhesion, moisture resistance, water resistance, etc. may be lowered, and when it exceeds 35 parts by weight, it is not economical because there is no effect change due to excessive input, it is preferable to be added within the above range.

In addition, the coating composition includes a topcoat in which 1 to 30 parts by weight of the dispersion, 10 to 300 parts by weight of the aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender are mixed with respect to 100 parts by weight of water. can be configured.

The top coat may color the surface of a concrete structure or a steel structure, protect it, and act as a waterproofing agent.

The dispersion is preferably added in an amount of 1 to 30 parts by weight based on 100 parts by weight of water. If it is less than 1 part by weight, leveling properties, non-staining properties, weather resistance, and temperature resistance may be lowered, and if it exceeds 30 parts by weight, it is not economical because there is no effect change due to excessive input. It is preferable to be added within the above range.

The aqueous resin is preferably added in an amount of 10 to 300 parts by weight based on 100 parts by weight of water. If it is less than 10 parts by weight, the workability may deteriorate due to deterioration of abrasion resistance, water resistance, chemical resistance, storage stability, etc., and if it exceeds 300 parts by weight, there is no effect change due to excessive input and it is uneconomical. desirable.

The titanium dioxide is preferably added in an amount of 10 to 200 parts by weight based on 100 parts by weight of water. If it is less than 10 parts by weight, chemical resistance, gloss, weather resistance, corrosion resistance, etc. may be lowered, and if it exceeds 200 parts by weight, it is not economical because there is no effect change due to excessive input. It is preferable to be added within the above range.

The extender pigment is preferably added in an amount of 1 to 35 parts by weight based on 100 parts by weight of water. When it is less than 1 part by weight, strength, adhesion, moisture resistance, water resistance, etc. may be lowered, and when it exceeds 35 parts by weight, it is not economical because there is no effect change due to excessive input, it is preferable to be added within the above range.

Hereinafter, as shown in FIG. 1, the manufacturing method for preparing the coating composition of the steel structure and the concrete structure to which the hydrophilic organic-inorganic composite dispersion compatible with the aqueous resin of the present invention as described above is applied will be described in detail as follows. .

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

The first preparation step of preparing any one or a plurality of additives from an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water, and an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water prepared in the first preparation step at 30 to 70° C. A homogenization step of homogenizing the dispersion by mixing at a temperature, a second preparation step of preparing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment, and a primer by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment with the dispersion A third step of preparing a primer, a step of preparing a primer by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment in the dispersion, and a third step of preparing a water-based resin, titanium dioxide, coloring pigment, and extender pigment It may be configured to include a preparation step and a topcoat preparation step of preparing a topcoat by mixing an aqueous resin, titanium dioxide, a coloring pigment, and an extender pigment in the dispersion.

In the first preparation step, an organic dispersant, an inorganic dispersant, a fluidity adjuster, an antifoaming agent, and water are prepared.

In this case, the organic dispersant and the inorganic dispersant may be compatible with one-component emulsion resin, two-component acrylic polyol, epoxy, and fluororesin.

In the homogenization step, the dispersion is homogenized by mixing the organic dispersant, the inorganic dispersant, the fluidity regulator, the defoaming agent, and water prepared in the first preparation step at a temperature of 30 to 70°C.

By mixing the dispersion at a temperature of 30 to 70° C., the fluidity of the dispersion can be improved and air bubbles remaining therein can be substituted.

In this case, in the homogenization step, it is preferable to mix the organic dispersant, the inorganic dispersant, the fluidity regulator, the antifoaming agent, and water at a temperature of 30°C to 70°C. , antifoaming agent and water are not uniformly mixed, so problems such as seed generation and poor appearance may occur, and when mixing at a temperature exceeding 70°C, another mixture may be formed by high temperature. It is preferable to heat to a temperature within the range.

In addition, in the homogenization step, it is preferable to stir at a high speed for 45 minutes to 60 minutes at a speed of 1,000 to 1,500 rpm. , more than 1,500 rpm, when stirring for more than 60 minutes, it is difficult to uniformly mix while each composition is sufficiently dispersed, it is preferable to stir at a speed and time within the above range.

In the second preparation step, an aqueous resin, titanium dioxide, an extender pigment, a rust preventive pigment, and a coloring pigment are prepared.

In the second preparation step, as the aqueous resin, an epoxy resin, a urethane resin, an alkyd resin, an acrylic resin, etc. may be used alone or in combination.

The primer preparation step prepares a primer by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment with the dispersion mixed in the homogenization step.

At this time, when the primer prepared in the preparation step of the primer is applied as a concrete primer, in order to facilitate the replacement of air bubbles on the surface of the material, it may be prepared without including pigments such as titanium dioxide and an extender pigment.

In addition, the primer may use a water-soluble epoxy resin as an aqueous resin, for example, any one selected from a self emulsifiable epoxy, a liquid epoxy emulsion, and a solid epoxy emulsion. One or a mixture of a plurality of them may be used.

In addition, the primer may be used as a curing agent, any one selected from polyamide, polyamine, and phenalkamine, or a mixture of a plurality of them.

The intermediate agent preparation step prepares a middle agent by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment with the dispersion prepared in the homogenization step.

The topcoat preparation step prepares a topcoat by mixing an aqueous resin, titanium dioxide, a coloring pigment, and an extender pigment with the dispersion prepared in the homogenization step.

In the step of preparing the top coat, the softened product is prepared by mixing an inorganic dispersant, an extender, a coloring pigment, and water with the dispersion, and an aqueous resin, water, and a thickener are added to the softened product prepared in the softened product manufacturing step. The main part manufacturing step of preparing the main part by mixing, the curing agent manufacturing step of preparing the curing agent part by mixing a curing agent and propylene glycol methyl ether acetate (PMA), and 1: 0.2 parts by weight of the main part and the curing agent part Thus, a topcoat can be prepared.

In the softening manufacturing step, any one or a plurality of colored pigments selected from an inorganic dispersant, an extender pigment, organic red, organic yellow, phthalocyanine-based, carbon black, and iron oxide are mixed with water to prepare a softened product.

The main part manufacturing step prepares the main part by further mixing a water-based resin, water, and a thickener with the softened product prepared in the softening product manufacturing step.

In the curing part manufacturing step, a curing agent part is prepared by mixing a curing agent and propylene glycol methyl ether acetate and stirring at a high speed for 30 minutes to 1 hour at a speed of 1000 to 2000 rpm.

In the curing agent manufacturing step, the curing agent may include methylene diphenyl diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate, but more preferably hexamethylene diisocyanate, iso Preference is given to using porone diisocyanate.

In the step of preparing the curing agent, it is preferable to stir at a high speed for 30 minutes to 1 hour at a speed of 1000 to 2000 rpm. Each composition may not be mixed properly, and when stirring at a speed exceeding 2000 rpm for more than 1 hour, each composition is sufficiently dispersed and it is difficult to uniformly mix, so it is stirred at a speed and time within the above range. It is preferable to do

After the step of preparing the curing agent part, it is preferable to prepare a topcoat by mixing the prepared main part and the curing agent part in a 1:0.2 weight ratio. When the amount exceeds 1 part by weight of the main part and 0.2 parts by weight of the curing agent, adhesion failure may occur at the interface between the intermediate agent and the top coating agent, so it is preferable to use the mixture in a weight ratio within the above range.

In addition, in the step of preparing the topcoat, the topcoat may be prepared by high-speed stirring for 1 minute to 10 minutes at a speed of 500 to 1500 rpm.

In the topcoat preparation step, when stirring at a speed of less than 500 rpm and less than 1 minute, the mixing speed may take a long time to decrease productivity or the respective compositions may not be mixed properly, and a speed exceeding 1500 rpm, 10 minutes When stirring in excess, it is difficult to uniformly mix each composition while sufficiently dispersed, so it is preferable to stir at a speed and time within the above range.

Hereinafter, as shown in FIG. 2, the surface coating method using the coating composition of the steel structure and the concrete structure to which the hydrophilic organic-inorganic composite dispersion compatible with the aqueous resin of the present invention as described above is applied will be described in detail as follows.

As shown in FIG. 2, the surface coating method using the coating composition of the steel structure and the concrete structure to which the hydrophilic organic-inorganic composite dispersion compatible with the water-based resin of the present invention is applied is,

After the surface treatment step of cleaning the surface of steel structures and concrete structures to treat the surface so that the coating composition can be applied, and after the surface treatment step, in a dispersion solution containing an organic dispersant, an inorganic dispersant, a fluidity regulator, an antifoaming agent, and water A primer layer application step of applying a primer composed of a mixture of water-based resin, titanium dioxide, an extender pigment, and a rust preventive pigment, and a primer layer drying step of drying the primer layer for 1 to 12 hours after the application step of the undercoat layer and organic dispersant, inorganic After the intermediate agent layer application step and the intermediate agent layer application step, the intermediate agent layer is applied with 1 to A middle coat layer drying step of drying for 12 hours and a top coat layer application step of applying a top coat consisting of mixing an organic dispersant, an inorganic dispersant, a fluidity regulator, an anti-foaming agent, and water with an aqueous resin, titanium dioxide, a coloring pigment, and an extender pigment and a drying step of drying the topcoat layer for 1 to 12 hours after the step of applying the topcoat layer.

In the surface treatment step, the surface of the concrete structure and the steel structure, that is, foreign substances on the surface, the oxide film of the iron material, etc., are cleaned and the surface is treated so that the coating composition can be applied.

In the step of applying the primer layer, after the surface treatment step, an organic dispersant, an inorganic dispersant, a fluidity modifier, an antifoaming agent, and water are mixed with a concrete structure and a steel structure by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment. Apply a primer.

In the step of drying the undercoat layer, after the step of applying the undercoat layer, the undercoat layer is dried for 1 to 12 hours.

The primer layer is preferably dried for 1 to 12 hours, but if it is dried for less than 1 hour, drying is not sufficiently achieved, so it may be mixed with the primer when applying the intermediate agent thereafter, and may be dried for more than 12 hours. In this case, it is preferable to dry for a time within the above range because a problem may occur that only the working time becomes longer.

In the intermediate agent layer application step, after the primer layer drying step, an aqueous resin, titanium dioxide, an extender, and a coloring pigment are mixed in a dispersion in which an organic dispersant, an inorganic dispersant, a fluidity regulator, an antifoaming agent, and water are mixed. .

In the intermediate agent layer drying step, the intermediate agent layer is dried for 1 to 12 hours after the intermediate agent layer application step.

It is preferable that the intermediate layer be dried for 1 to 12 hours, but if it is dried for less than 1 hour, drying is not achieved sufficiently, so it may be mixed with the intermediate agent when the top coat is applied thereafter, and may be dried for more than 12 hours. In this case, it is preferable to dry for a time within the above range because a problem may occur that only the working time becomes longer.

In the step of applying the top coat layer, after the drying step of the intermediate layer, an organic dispersant, an inorganic dispersant, a fluidity regulator, an antifoaming agent, and water are mixed with an aqueous resin, titanium dioxide, a coloring pigment, and an extender pigment. .

In the step of drying the topcoat, the topcoat layer is dried for 1 to 12 hours after the step of applying the topcoat layer.

It is preferable that the topcoat layer be dried for 1 to 12 hours, but if it is dried for less than 1 hour, the drying may not be sufficiently performed, and problems such as a decrease in strength and a decrease in water resistance may occur afterward, and drying for more than 12 hours may occur. In this case, it is preferable to dry for a time within the above range, because a problem that only the working time becomes longer may occur.

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

(preparation example)

In 920g of water, 20g of fluidity regulator (BYK, LAPONITE RD), 23g of organic dispersant (BYK, Disperbyk 2014), 23g of inorganic dispersant (BYK, Disperbyk 180), and 13g of antifoaming agent (BASF, FOAMSTAR ED 2526) were put into the mixing container in sequence. , a dispersion was prepared by dispersing and stirring at 1,000 to 1,500 rpm at 50° C. for 45 minutes to 1 hour.

(Example 1)

30 g of the dispersion (first mixture) prepared in the above preparation example in 100 g of water, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL, RAVEN 14P) 5g was uniformly mixed, and then softened for about 2 hours with a ball mill to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-1) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Example 2)

70 g of the dispersion (first mixture) prepared in the above preparation example in 100 g of water, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL, RAVEN 14P) 5g was uniformly mixed, and then softened for about 2 hours with a ball mill to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-2) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Comparative Example 1)

100g of water, 200g of titanium dioxide (Dupont, Ti pure R-706), 35g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), and 5g of black pigment (COLOMBIA CHEMICAL, RAVEN 14P) are uniformly mixed with a ball mill about 2 A softening process was performed to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-3) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Comparative Example 2)

0.01 g of the dispersion (first mixture) prepared in the above preparation example in 100 g of water, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL) , RAVEN 14P) was uniformly mixed and then softened for about 2 hours with a ball mill to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-4) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Comparative Example 3)

In 100 g of water, 0.05 g of the dispersion (first mixture) prepared in the above preparation example, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL) , RAVEN 14P) was uniformly mixed and then softened for about 2 hours with a ball mill to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-5) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Comparative Example 4)

In 100 g of water, 0.1 g of the dispersion (first mixture) prepared in the above preparation example, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL) , RAVEN 14P) was uniformly mixed and then softened for about 2 hours with a ball mill to prepare a softened product.

To 470 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 60 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare the main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-6) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

(Comparative Example 5)

80 g of the dispersion (first mixture) prepared in the above preparation example in 100 g of water, 200 g of titanium dioxide (Dupont, Ti pure R-706), 35 g of extender pigment (Korea Semiconductor Materials Co., Ltd., NB-0020), black pigment (COLOMBIA CHEMICAL, RAVEN 14P) 5g was uniformly mixed, and then softened for about 2 hours with a ball mill to prepare a softened product.

To 450 g of the prepared softened product, 450 g of a water-soluble urethane resin (Wanhua, ANTKOTE 2035), 80 g of water, and 20 g of a thickener (DOW, Acrysol SCT-275) were post-added, followed by post-addition mixing for 1 hour to prepare a main part.

Next, 400 g of water-soluble urethane curing agent resin 1 (COVESTRO, Bayhydur XP 2547), 400 g of water-soluble urethane curing agent resin 2 (Wanhua, WANNATE HT 100), and 200 g of propylene glycol methyl ether acetate (PMA) are added to the mixing container. After filling, the curing agent part was prepared by dispersing and stirring at 1,500 rpm for 45 minutes using a high-speed stirrer.

A water-soluble urethane topcoat (B-7) was prepared by mixing the prepared urethane main part and curing agent part in a weight ratio of 1:0.2 and stirring at 1,000 rpm for 5 minutes.

Table 1 below shows the compositions and contents of the water-soluble urethane coating compositions of Examples 1 to 2 above.

division Example 1 Example 2 subject part softening process water 100 100 dispersion 30 70 titanium dioxide 200 200 body pigment 35 35 black pigment 5 5 Post-addition compounding process Water-soluble urethane resin 450 450 water 80 80 thickener 20 20 hardener part Water-soluble hardener resin 1 400 400 Water-soluble hardener resin 2 400 400 PMA 200 200

Table 2 below shows the composition and content of the water-soluble urethane coating composition of Comparative Examples 1 to 5.

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 subject part softening process water 100 100 100 100 100 dispersion - 0.01 0.05 0.1 80 titanium dioxide 200 200 200 200 200 body pigment 35 35 35 35 35 black pigment 5 5 5 5 5 water 150 150 150 150 150 Post-addition compounding process Water-soluble urethane resin 450 450 450 450 450 water 80 80 80 80 80 thickener 20 20 20 20 20 hardener part Water-soluble hardener resin 1 400 400 400 400 400 Water-soluble hardener resin 2 400 400 400 400 400 water 200 200 200 200 200

[Experimental Example 1]

The water-soluble urethane coating composition prepared in Examples 1 to 2 and Comparative Examples 1 to 5 was coated on a glass plate with a dry film thickness of 50 μm to evaluate the appearance, and the results are shown in Table 3 below.

-Appearance evaluation

The appearance was evaluated according to the appearance of the dry film (test method KS M 5000-2421) according to the standard water-soluble urethane-based paint (SPS-KPIC 5018-1920).

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 appearance of dry film ◎ ◎ X
(white precipitation heterogeneity, deficient defoaming) X
(Different color of black precipitation, poor defoaming) △
(Unique color, some parcels occur) △
(Unique color, some parcels occur) △
(Unique color, some parcels occur)

◎: Excellent ○: Good △: Poor X: Poor

[Experimental Example 2]

- Accelerated weathering resistance

The QUV test is carried out according to Cycle 2 of ASTM G 154, using a UVB-313 lamp, following the cycle of UV irradiation (60℃, 4 hours)/condensation (50℃, 4 hours). was evaluated and shown in Table 4.

-Pencil hardness

For pencil hardness, visually judge the degree of scratching when drawn at a 45º angle for each type of pencil on the dried paint film using a pencil hardness tester according to the pencil hardness method of JIS K-5400. The pencil hardness is shown in the order of B, HB, F, H, 2H, 3H, and the better pencil hardness is evaluated as it goes to the right, and it is described in Table 4.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 accelerated weathering
(QUV 3000h) ◎ ◎ △ △ △ △ △

◎: Excellent ○: Good △: Poor X: Poor

As shown in Tables 3 to 4, the coating composition for steel structures and concrete structures to which the hydrophilic organic-inorganic composite dispersion compatible with the aqueous resin prepared according to the present invention is applied is mixed with water, a fluidity regulator, an organic dispersant, an inorganic dispersant, and an antifoaming agent It can be seen that the dry film of Examples 1 to 2 containing titanium dioxide, an extender pigment, and a coloring pigment in the hydrophilic organic-inorganic composite dispersion was excellent in appearance and accelerated weather resistance.

That is, the coating composition of steel structures and concrete structures to which the hydrophilic organic-inorganic composite dispersion compatible with the aqueous resin prepared according to the present invention is applied is generally selected from an organic dispersant and an inorganic dispersant. It is excellent in appearance without defects such as precipitation, discoloration, and defoaming, and as it has excellent accelerated weather resistance, improvement in workability and lifespan can be expected.

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

Claims (10)

Any one or a plurality of aqueous resins selected from epoxy resins, urethane resins, alkyd resins, and acrylic resins;
Mica, silica, talc, calcium carbonate, barium sulfate and clay Any one or a plurality of extender pigments selected from;
any one or a plurality of anti-rust pigments selected from the group consisting of zinc phosphate, zinc powder, aluminum paste and iron oxide; and
Any one or a plurality of organic dispersants selected from silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate, titanium dioxide, A dispersion comprising a fluidity modifier, an antifoaming agent, and an additive including water;
The dispersion is
Any one or more selected from the silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate based on 100 parts by weight of water It is characterized in that a mixture of 1 to 30 parts by weight of an organic dispersant, 1 to 30 parts by weight of titanium dioxide, 1 to 30 parts by weight of a fluidity regulator, and 1 to 20 parts by weight of an antifoaming agent is used,
A primer comprising 1 to 70 parts by weight of the dispersion, 10 to 300 parts by weight of an aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender based on 100 parts by weight of water;
An intermediate agent comprising 1 to 70 parts by weight of the dispersion, 10 to 300 parts by weight of an aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender based on 100 parts by weight of water; and
a topcoat comprising 1 to 70 parts by weight of the dispersion, 10 to 300 parts by weight of an aqueous resin, 10 to 200 parts by weight of titanium dioxide, and 1 to 35 parts by weight of an extender based on 100 parts by weight of water;
A coating composition for steel structures and concrete structures to which a hydrophilic organic-inorganic composite dispersion compatible with a water-based resin comprising a.
delete delete delete delete delete delete delete In the method for producing a coating composition of a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with the water-based resin according to claim 1 is applied,
Any one or a plurality of organic dispersants selected from silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate, titanium dioxide, A first preparation step of preparing an additive including a fluidity regulator, an antifoaming agent, and water;
Any one or more selected from silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate prepared in the first preparation step A homogenization step of homogenizing the dispersion by mixing the organic dispersant, titanium dioxide , fluidity regulator, antifoaming agent, and water at a temperature of 30 to 70°C;
After the homogenization step, a second preparation step of preparing an aqueous resin, titanium dioxide, an extender pigment, a rust preventive pigment and a coloring pigment;
After the second preparation step, a primer preparation step of preparing a primer by mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment in the dispersion;
After the second preparation step, an intermediate agent preparation step of mixing an aqueous resin, titanium dioxide, an extender pigment, and a coloring pigment in the dispersion to prepare a middle agent; and
After the second preparation step, a topcoat preparation step of preparing a topcoat by mixing an aqueous resin, titanium dioxide, a coloring pigment, and an extender pigment in the dispersion;
The topcoat preparation step is,
a softening product manufacturing step of preparing a softened product by mixing white titanium dioxide, an extender pigment, a colored pigment, and water in the dispersion;
a main part manufacturing step of manufacturing a main part by mixing a water-based resin, water, and a thickener with the softened product prepared in the softened product manufacturing step;
After the main sub-manufacturing step, a curing agent sub-manufacturing step of mixing a curing agent and propylene glycol methyl ether acetate to prepare a curing agent part;
A method for producing a coating composition of a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with an aqueous resin, characterized in that it comprises a.
In the surface coating method using the coating composition of a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with the water-based resin according to claim 1 is applied,
A surface treatment step of cleaning the surface of the steel structure and the concrete structure to treat the surface so that the coating composition can be applied;
After the surface treatment step, any one or more selected from silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate to the concrete structure after the surface treatment step an organic dispersing agent, titanium dioxide , a fluidity regulator, an antifoaming agent, and a primer layer application step of applying a primer composed of mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment to a mixed dispersion;
After the step of applying the primer layer, a drying step of drying the primer layer for 1 to 12 hours;
After the drying step of the primer layer, any one or more selected from silicone-based emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate An organic dispersing agent, titanium dioxide , a fluidity modifier, an antifoaming agent, and an intermediate agent layer coating step of applying a middle agent composed of mixing an aqueous resin, titanium dioxide, an extender pigment, and a rust preventive pigment to a mixed dispersion;
After the intermediate agent layer application step, the intermediate agent layer drying step of drying the intermediate agent layer for 1 to 12 hours;
After the intermediate agent layer drying step, any one or more selected from silicone emulsion type, self-emulsifying type, oil type, oil compound type, solution type, powder type, solid polyester derivative, lecithin, fatty acid and alkylphenol ethoxylate Dog organic dispersing agent, titanium dioxide , a fluidity regulator, an antifoaming agent, a top coat layer application step of applying a top coat composed of a mixture of water-based resin, titanium dioxide, a coloring pigment, an extender pigment in a mixed dispersion;
a topcoat layer drying step of drying the topcoat layer for 1 to 12 hours after the topcoat layer application step;
A surface coating method using a coating composition of a steel structure and a concrete structure to which a hydrophilic organic-inorganic composite dispersion compatible with a water-based resin is configured, characterized in that it comprises a.

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