KR101858036B1 - A waterproof coating composition for wet coating excellent in chemical resistance, comprising a ceramic-based network-structured resin mixture, and a method of applying the waterproof coating composition - Google Patents

Abstract

The present invention relates to a waterproof paint composition for wet coating having excellent chemical resistance including a ceramic-based network structured resin mixture, and a construction method using the same. More specifically, the present invention discloses a waterproof paint composition for wet adhesion including a ceramic-based network structured resin mixture, and a construction method using the same. The paint composition comprises: a main agent including 55 to 100 parts by weight of the ceramic-based network structured resin mixture, 3 to 5 parts by weight of a nonreactive diluent, 5 to 20 parts by weight of a ceramic-based extender pigment, 3 to 5 parts by weight of a coloring pigment, and 1 to 3 parts by weight of an antifoaming agent; and a curing agent including 50 to 70 parts by weight of a modified amine and 10 to 20 parts by weight of an extender pigment, wherein the main agent and the curing agent are mixed at the ratio of 1-5:1. The ceramic-based network structured resin mixture includes a ceramic resin, a network structured acrylic resin mixture, a ceramic powder and a surfactant at weight ratios of 40-70:5-10:10-20:1-5, and the network structured acrylic resin mixture includes 40 to 50 parts by weight of a network structured acryl emulsion resin, 3 to 5 parts by weight of an antifoaming agent, 10 to 20 parts by weight of water, 1 to 3 parts by weight of an anti-freezing agent, and 1 to 3 parts by weight of a preservative.

Description

Technical Field [0001] The present invention relates to a waterproof coating composition for wet coating, which is excellent in chemical resistance, including a ceramic-based network-structured resin mixture, and a method of using the waterproof coating composition. a method of applying the waterproof coating composition,

The present invention relates to a waterproof coating composition for wet coating having excellent chemical resistance, which comprises a ceramic-based network-structured resin mixture, and a method of using the same.

Coating paints are widely used in water tanks, water treatment plants, ships, structures, etc., which have various kinds of surfaces such as steel, stainless steel, FRP synthetic resin, and concrete. Epoxy coatings are widely used.

In the case of a paint for internal coating of a member for a water supply member, it is required to meet the characteristics of water resistance, corrosion resistance, durability, bending resistance, abrasion resistance, chemical resistance and the like according to the characteristics of a water service member. In addition, it is required that the coating film should not be cracked. For this purpose, when forming a coating film using a coating material for internal use in a water supply member, the durability, impact resistance, cold resistance and adhesive force characteristics should be good and uniform coating of the coating film should be possible.

In addition, when applied to a concrete structure, the formed coating should exhibit satisfactory physical properties in terms of compressive strength, and should exhibit good adhesion strength on a dry or wet concrete surface. In addition, when used as a flooring material, the cured product should not be peeled off due to high heat at the bottom of the cooking utensil such as a kitchen or a food processing factory.

Also, when the concrete structure is wet, the concrete structure must be completely dried to a moisture content of 8% or less in order to apply the primer and the polymer cement mortar, and thus, when water is present on the surface, the construction is difficult.

Especially, most of the water and sewage water treatment facilities managed by government, municipal governments, and water tanks installed in drainage areas, apartment complexes and big buildings are coated with organic products which are not breathable and weak in humidity. During the inspection, problems such as the dropping, swelling and blistering of the coating material occur. In order to repair the problem, the organic coating agent is applied. As a result of the asphyxiation due to the organic solvent, many people are injured and the gas generated by the organic solvent There is a problem in that it is permeated into a tank where water is stored and the stored water can not be used.

In addition, waterworks, sewage facilities, water tanks and other water-related members, vessels, bridges, bridges, tunnels, marine and terrestrial structures with various surfaces such as steel, stainless steel, FRP synthetic resin, Or urgent repair are required. In order to replace the product with aging or partial aging, a great deal of time and cost must be invested. Therefore, it is required to develop a coating composition that is waterproof and waterproof.

Patent Registration No. 10-1086495 (Nov. 17, 2011)

Accordingly, the present invention can be applied to various wetted surfaces such as water tank, water supply member such as a water tank, a ship, concrete structure, etc. to exhibit excellent chemical resistance, waterproof anticorrosive property and coating property, A ceramic-based reticulated resin mixture that exhibits excellent thermal elasticity and repairability that can be applied to maintenance and reinforcement or emergency repair and has flame retardancy while enhancing durability and weatherability by giving flexible elasticity and excellent adhesion to the surface The present invention also provides a waterproof coating composition for wet coating which is excellent in chemical resistance.

Another object of the present invention is to provide a method of applying a waterproof coating composition for wet coating having excellent chemical resistance, which comprises the ceramic-based network-structured resin mixture.

According to an aspect of the present invention,

50 to 100 parts by weight of a ceramic network-structured resin mixture, 3 to 5 parts by weight of a non-reactive diluent, 5 to 20 parts by weight of a ceramic-based extender pigment, 3 to 5 parts by weight of a color pigment and 1 to 3 parts by weight of a defoamer; And

50 to 70 parts by weight of a modified amine, and 10 to 20 parts by weight of an extender pigment,

The subject and the curing agent are mixed at a ratio of 1 to 5: 1,

Wherein the ceramic network-structured resin mixture contains a ceramic resin, a network-structured acrylic resin mixture, a ceramic-based extender pigment and a surfactant in a weight ratio of 40 to 70: 5 to 10: 10 to 20: 1 to 5,

Wherein the reticulated acrylic resin mixture comprises 40 to 50 parts by weight of a network-structured acrylic emulsion resin, 3 to 5 parts by weight of a defoamer, 10 to 20 parts by weight of water, 1 to 3 parts by weight of a cryoprotectant and 1 to 3 parts by weight of an antiseptic agent Features,

A waterproof coating composition for wet adhesion comprising a ceramic-based network-structured resin mixture is provided.

In the present invention, the reticulated acrylic emulsion resin may contain,

(i) mixing a surfactant with ion-exchanged water and raising the temperature thereof with stirring to prepare a first mixture; (ii) adding a pre-emulsion and an initiator of an acrylic monomer mixture comprising an acrylic or methacrylic monomer having an aliphatic group, an acid monomer, a surfactant, and ion-exchanged water to the first mixture and reacting to prepare a second mixture; (iii) aging the second mixture to prepare a third mixture by adjusting the pH thereof, and (iv) adding a crosslinking polymer to the third mixture to adjust the physical properties thereof. do.

According to another aspect of the present invention,

A pretreatment step of the substrate surface subjected to high pressure washing and smoothing treatment; And

And a step of forming a waterproof coating film for applying the coating composition to the pretreated substrate, wherein the waterproof coating composition for wet coating is excellent in chemical resistance.

According to another aspect of the present invention,

High pressure washing of the base surface of the concrete structure;

Forming a permeable coating layer on the cleaned surface by applying an inorganic silicate based permeable coating to the surface of the concrete structure to increase the strength of the surface of the concrete structure;

Smoothing the formed permeable coating film;

And a step of forming a waterproof coating film for applying the coating composition on the top surface of the smoothed permeable coating film, wherein the waterproof coating composition for wet coating is excellent in chemical resistance.

The paint composition according to the present invention can be applied to various surfaces such as a water tank, a water tank, a water supply member, a ship, and a concrete structure to exhibit excellent chemical resistance, waterproof anticorrosion property and wet coating property. Also, the coating composition of the present invention can exhibit excellent thermal elasticity and repairing ability which is applicable even in the case of repairing or reinforcing repair or emergency repair including coating on the wet side, and it is excellent in durability and weatherability It has an effect of showing flame retardancy and incombustibility.

Further, in the application of the waterproofing method according to the present invention, a waterproof coating film having excellent chemical resistance and wet coating property is formed after the pretreatment by high pressure washing and smoothing treatment, and the formed coating film is completely washed So that it is suitable for the waterproof type construction of inner surface of a water supply member such as a hot water tank, an underground water storage tank and a water purification plant, and it is possible to make a waterproof type completely do.

In addition, when the waterproof coating composition according to the present invention is applied to a concrete structure, the surface layer of the concrete structure is reinforced and protected while waterproofing is applied, and thus waterproofing and repairing reinforcement can be accomplished completely.

Fig. 1 shows the results of physical properties test of the coating composition of the present invention.
Fig. 2 shows the results of physical properties test of the coating composition of the present invention.
3 shows the results of physical properties test of the coating composition of the present invention.

Hereinafter, the present invention will be described in detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

The present invention relates to a waterproof coating composition for wet adhesion comprising a ceramic-based network-structured resin mixture.

In one aspect of the present invention, there is provided a method for producing a ceramic composition, which comprises 55 to 100 parts by weight of a ceramic network-structured resin mixture, 3 to 5 parts by weight of a non-reactive diluent, 5 to 20 parts by weight of a ceramic- A subject comprising parts by weight; And 50 to 70 parts by weight of a modified amine and 10 to 20 parts by weight of an extender pigment, wherein the subject and the curing agent are mixed in a ratio of 1 to 5: 1.

In the present invention, the ceramic network-structured resin mixture contains a ceramic resin, a network-structured acrylic resin mixture, a ceramic powder and a surfactant in a weight ratio of 40 to 70: 5 to 10: 10 to 20: 1 to 5.

In the present invention, it is preferable that the reticulated acrylic resin mixture comprises 40 to 50 parts by weight of a network-structured acrylic emulsion resin, 3 to 5 parts by weight of a defoamer, 10 to 20 parts by weight of water, 1 to 3 parts by weight of a cryoprotectant, 3 parts by weight.

Hereinafter, the present invention will be described in detail.

First, in the present invention, the ceramic network-structured resin mixture constituting the subject includes a ceramic resin, a network-structured acrylic resin mixture, a ceramic powder and a surfactant so that the ceramic powder is uniformly dispersed by the network structure, And exhibits excellent durability, heat resistance and the like, as well as improves the adhesion of the waterproof paint composition.

At this time, the ceramic network-structured resin mixture constituting the subject includes a ceramic resin. The above-mentioned ceramic resin can be a commercially available product, is formed by a sol-gel process, and is obtained by putting methyl methacrylate in pores of a silica gel obtained by using a silicon alkoxide, followed by polymerization reaction. Examples of the silicon alkoxide include silicon tetraethoxide, silicon tetramethoxide and the like. The content of methyl methacrylate may be 0.1 to 3 parts by weight based on 100 parts by weight of the silicon alkoxide.

Further, the reticulated acrylic resin mixture contained in the ceramic-based network-structured resin mixture is resistant to acid and / or base by using an acrylic resin, provides weather resistance that prevents discoloration due to ultraviolet rays or aging of the structure, .

Accordingly, the waterproof coating composition of the present invention includes the acrylic emulsion resin of the network structure, thereby remarkably improving the adhesion force for allowing the coating composition to easily adhere to the application surface on which the coating film is to be formed.

Preferably, the reticulated acrylic emulsion resin is prepared by (i) mixing a surfactant with ion-exchanged water and raising the temperature thereof with stirring to prepare a first mixture; (ii) adding a pre-emulsion and an initiator of an acrylic monomer mixture comprising an acrylic or methacrylic monomer having an aliphatic group, an acid monomer, a surfactant, and ion-exchanged water to the first mixture and reacting to prepare a second mixture; (iii) aging the second mixture and adjusting the pH to prepare a third mixture, and (iv) adding a crosslinking polymer to the third mixture to adjust the physical properties.

More specifically, in step (i), 0.2 to 1.0 wt% of a surfactant is mixed with 99.0 to 99.8 wt% of ion-exchanged water, and the mixture is heated to 75 to 85 캜 with stirring at 80 to 130 RPM. At this time, it is preferable to use at least one surfactant selected from the group consisting of sodium dodecylbenzene sulfonate, sodium dodecylbenzene sulfonate, nonionic ether sulfate and dialkylsulfonic acid ester.

The step (ii) further comprises adding 0.2 to 0.3% by weight of an initiator which is a mixture of one or more selected from the group consisting of ammonium persulfate, sodium persulfate, and potassium persulfate to the mixture heated to 80 to 85 ° C in step (i) Acrylic acid or methacrylic monomer having an aliphatic group, an acid monomer, a surfactant, and 99.7 to 99.8% by weight of an acrylic monomer mixture pre-emulsion composed of ion-exchanged water.

At this time, when the acrylic monomer mixture pre-emulsion is added all at once, there arises a problem of gelation due to a sudden reaction of a large number of monomers. Accordingly, 5 to 10% by weight of the acrylic monomer mixture pre-emulsion to be added to the mixture is preliminarily added in an amount of 5 to 10% by weight based on 100 parts by weight of the pre-emulsion, and then the first reaction is carried out for 5 to 20 minutes. It is important to react.

The acrylic or methacrylic monomer having an aliphatic group may be selected from the group consisting of methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate One or two selected from the group consisting of butyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl acrylate, normal propyl methacrylate, 2-ethylhexyl methacrylate, glycidyl methacrylate and lauryl methacrylate Mixtures of more than two species are used.

The acrylic or methacrylic monomer is preferably 60 to 90% by weight based on 100 parts by weight of the acrylic monomer mixture pre-emulsion total.

Further, the acid monomer is a mixture of one or more selected from the group consisting of methacrylic acid, acrylic acid, maleic anhydride, and itaconic acid. The amount of the acid monomer is preferably 0.5 to 3.0% by weight based on 100 parts by weight of the acrylic monomer mixture pre-emulsion total.

The surfactant may be any of the surfactants described above, and may be used in an amount of 0.5 to 3.0 parts by weight based on 100 parts by weight of the acrylic monomer mixture pre-emulsion.

The step (iii) is followed by aging the mixture of step (ii) at 65 to 75 ° C for 60 to 120 minutes, and then adjusting the pH of the aged mixture to 7 to 10. That is, the process of aging the mixture of step (ii) may further assist the removal of the unreacted residual monomers, so that the addition of the initiator after the addition of the initiator may help to remove the residual monomer, Suitable for removal. Since the aged mixture is acidic with a pH of 2 to 6, it is preferable to adjust the pH to 7 to 10 to suit the storage stability of the mixture.

Finally, in step (iv), the crosslinked polymer is added in an amount of from 0.5 to 3.0% by weight to 97 to 99.5% by weight of the mixture of step (iii), and then the mixture is stirred for 30 to 60 minutes to prepare a network-structured acrylic emulsion resin do.

If the content of the cross-linking polymer exceeds 3.0% by weight, the property of the physical property may not be improved or may be decreased. Therefore, it is preferable to add 0.5 to 3.0% by weight based on 100% by weight of the mixture. The crosslinked polymer may be one or a mixture of two or more selected from the group consisting of phenol formaldehyde, epoxy, unsaturated polyester, melamine, amide and urea.

Since the waterproof coating composition of the present invention includes the network-structured acrylic emulsion resin in the ceramic-based network-structured resin mixture, the drying property can be improved to improve the convenience of the construction, It is possible to remarkably improve durability while being excellent in waterproofness, performance and stain resistance. It is also resistant to acids and / or bases and provides weathering resistance and stain resistant sulfur which prevent discoloration due to ultraviolet rays and aging of the structure, and at the same time can impart surface gloss and can provide incombustibility and flame retardancy .

Also, in the present invention, the network-structured acrylic resin mixture is prepared by mixing the network-structured acrylic emulsion resin with a defoaming agent, water, a cryoprotectant and water in order while stirring.

At this time, the antifoaming agent is for suppressing bubbles in the coating composition to form a uniform coating film. In the present invention, the antifoaming agent is composed of any one selected from nonionic or silicone. The defoaming agent serves to remove air bubbles remaining at the time of use of the coating composition. When the amount is less than 3 parts by weight, the effect of removing air bubbles deteriorates. When the amount of the defoaming agent is more than 5 parts by weight,

In addition, the cryoprotectant provides an effect of facilitating the coating operation of the coating composition by delaying rapid drying while ensuring stability of physical properties even at a cold temperature of -5 ° C. When the cryoprotectant is less than 1 part by weight, If the amount is more than 3 parts by weight, there may be a problem in that the efficiency of use is low.

If the amount of the preservative is less than 1 part by weight, the preservation stability at room temperature may deteriorate, and the physical properties of the product may change during storage. When the amount exceeds 3 parts by weight, There may be a problem of low contrast efficiency.

The ceramic powder contained in the ceramic network-structured resin mixture may be selected from the group consisting of Illite-Mica, Titanium Dioxide, Zeolite, Silica, Quartz, Flux, Olivine, Kaolin, Silicate Mineral, Diatomaceous Earth, Wollastonite, It may be used alone or in combination of any of the following: pyrophyllite, dolomite, dolomite, lithium mineral, magnesite, bauxite, bentonite, sepiolite, iron oxide, graphite, talc, clay mineral, titanium mineral, tourmaline, fly ash and blast furnace slag powder. Preferably, the above-mentioned ceramic powder is mixed with various materials at a ratio more suitable than when it is used alone. This is because the bonding force between the materials, the denseness of the coating film, the heat resistance of the coating film, the strength, the adhesion, the weather resistance, the corrosion resistance, It is possible to impart excellent characteristics of

In addition, the surfactant contained in the ceramic-based network-structured resin mixture has a function of reducing the surface tension of the interface and suppressing the formation of bubbles to make the hardened structure compact. As the network-structured acrylic resin mixture and the ceramic powder are well- Thereby forming a ceramic-based network-forming resin mixture. The surfactant may be selected from the group consisting of polyoxyethylene sorbitan alkyl ether, polyoxyethylene alkyl ester, polyoxyethylene nonylphenyl ether, polyoxyethylene lauryl ether, sorbitan stearate, polyether modified silicone, oxyethylene dodecyl Amine, polyester modified silicone, sorbitan laurate, polyoxyethylene octylphenyl ether, sorbitan sesquioleate, sulfonic acid polyoxyethylene alkylphenyl ether, fatty acid sodium soap, sodium dioctylsulfosuccinate, alkyl sulfate, polycarboxyl Sodium dodecylsulfate, sodium disodium lauryl sulfosuccinate, sodium alkyl ether sulfate, sodium acylmethyltaurate, sodium dodecylbenzenesulfonate, alkyldimethylbenzyl chloride, tetradecyldimethylbenzylammonium chloride, hexadecyltrimethylammonium chloride, alkylpropylenediamine acetate , Octadecylamine acetate, tetradecylamine acetate Agent, may be dideoxy room dimethyl ammonium chloride, octadecyldimethylbenzyl ammonium chloride, dimethyl any one or a mixture of two or more of those selected from an alcohol betaine, alkyl glycine and imidazole group consisting sleepy.

Preferably, the ceramic network-structured resin mixture constituting the above-mentioned subject is a mixture of a ceramic resin, a network-structured acrylic resin mixture, a ceramic powder and a surfactant in a ratio of 40 to 70: 5 to 10:10 to 20: 1 to 5 . When the above-mentioned range is included, the reticulated acrylic resin mixture and the main resin are mixed well and the ceramic powder is uniformly dispersed therein, so that durability due to inherent characteristics of ceramics, heat resistance, and excellent adhesion by resin can be exhibited.

In the present invention, the non-reactive diluent constituting the above-mentioned subject is added in order to control the viscosity of the composition of the present invention and to improve the adhesiveness. The non-reactive diluent is selected from the group consisting of phenyl glycidyl ether, Butylene glycol diglycidyl ether, salicylic acid (C7H6O3), and benzyl alcohol (C7H8O) in the presence of a catalyst, such as, for example, Cresyl glycidyl ether, butyl glycidyl ether or 1,4-butadiene diol diglycidyl ether. One or more selected from the group consisting of It is preferable that the non-reactive diluent is contained in an amount of 3 to 5 parts by weight. If the amount of the non-reactive diluent is less than 3 parts by weight, the effect of viscosity control and adhesion improves little, have.

In addition, the curing agent in the present invention affects pot life, curing time, and physical properties after curing depending on the kind and amount of the curing agent. In the present invention, in order to apply to various surfaces, a modified amine is included in the amine curing agent . The modified amine has a chain structure and reacts with the organic group of the main chain while increasing the cross-linking density, thereby enhancing the surface hardness and adhesion, and promoting hardening. The modified amine of the present invention preferably has a low viscosity and is easy to mix with the ceramic resin and has a long pot life and little toxicity.

Specifically, the modified amine is a modified aliphatic amine, a modified aromatic amine, or a mixture thereof. The modified aliphatic amine may be selected from the group consisting of diethylene triamine (DETA) triethylene tetramine (TETA), diethylamino (MEA), isopropylamine (DEAPA), Menthane diamine (MDA), N-aminoethyl piperazine (N-AEP), M-xylene diamine Isophorone diamine (IPDA), and the modified aromatic amine is selected from the group consisting of meta phenylene diamine (MPD), diaminodiphenyl methane (DDM), and diaminodiphenyl sulfone sulphone: DDS). The modified amine is preferably a resin having an amine value of 300 to 400 mg KOH / g, an active hydrogen equivalent of 80 to 100, and a viscosity of 1,000 to 2,500 cps (25 ° C) . If it is contained in the above range, it is impossible to give an appropriate hardening effect. If it exceeds the above range, there is a problem that the hardness of the coating film becomes excessively high due to excessive curing. Therefore, Use.

In the present invention, the ceramic-based extender pigment serves to fill the pores in the coating film and to complement and adjust the gloss and the gloss of the coating film. Specific examples thereof include calcium carbonate, clay, talc, magnesium silicate, And at least one selected from the above can be used to obtain a good coating film appearance, as well as to improve the rustproofing property and the like. The extender pigment is included in the topical and hardening agents so as to enhance the workability and the effect of the film formation. Preferably, the extender pigment is contained in an amount of 5 to 20 parts by weight for the subject and 10 to 20 parts by weight for the curing agent. If it is contained below the above range, it can not exhibit the effect of supplementing proper color and mechanical properties. If it exceeds the above range, there is no increase in effect, and it is uneconomical and some precipitate may occur. So that it is appropriately included in the hardener. It is more preferable to use those having an average particle diameter of 500 to 1000 nm.

Further, in the present invention, the above-mentioned colored pigment may be any of pigment pigments commonly used in epoxy-based non-application paints, and is not particularly limited in the present invention. The white pigment or the white pigment can be used regardless of the type of the rutile type titanium dioxide. The colored pigment contains an inorganic component pigment which does not contain a metal ion having a valence of 2 or more and which is not reactive. Is preferably used. Further, an iron oxide based inorganic coloring pigment or carbon black may be used. The colored pigment is included in the topical and curing agent so as to exhibit appropriate color. In this case, 3 to 5 parts by weight based on the subject weight are to be included. If it is contained below the above range, it can not exhibit proper color. On the contrary, even if it exceeds the above range, there is no increase in effect, and it is not economical and some precipitation may occur. Use as much as possible.

Also, it is preferable that the main portion and the curing agent portion are mixed at a ratio of 1: 5: 1. When the mixing ratio of the main portion and the curing agent portion satisfies the above range, it is possible to form a cap layer that forms a strong bond with the base surface made of various materials, and exhibits excellent chemical resistance, thermal elasticity, .

In addition to the above-mentioned components, known additives known in the art may be used in the present invention. As such additives, a coupling agent, a leveling agent, a pigment dispersant, a versatile additive, a waterproofing agent, an oil repellent, a water repellent agent, a stabilizer, a thickener, a preservative, a rust remover or an antistatic agent may be used. The content and the selection of the additive may be suitably selected and modified by a person having ordinary skill in the art, and may be suitably changed depending on the kind of the conductor to be applied.

According to another aspect of the present invention, there is provided a method of treating a surface of a substrate, And a step of forming a waterproof coating film for applying the coating composition to the pretreated base surface. The present invention also relates to a waterproof coating method using the waterproof coating composition for wet coating excellent in chemical resistance.

First, the pretreatment of the substrate surface is performed by high pressure cleaning and smoothing treatment. Specifically, high-pressure cleaning is a step that allows complete cleaning to be performed on a portion where the cleaning is difficult, such as a fine portion of the substrate. In this case, the high-pressure washing is performed by using a rotary nozzle at a pressure of 150 to 200 bar to wash the entire surface of the substrate, thereby allowing the latent matter and foreign matter at the boundary of the dropout to be sprayed from the side, . Also, the surface of the high-pressure cleaned surface is subjected to a smoothing treatment to remove the protruding portions of the ground surface, fit the fine portion, and flatten the ground surface so as to secure a maximally smooth working surface. By this smoothing treatment, the paint is applied to the base surface at a constant thickness to form a smooth coating film having a uniform thickness, and resistance to cracks and the like and adhesive force to the base surface can be increased.

Next, the step of forming the waterproof coating film is a step of forming a waterproof coating film by applying the above-mentioned epoxy coating composition to the pretreated substrate. The coating composition is applied in a state optimized to form a coating on the substrate surface by subjecting the substrate surface to substantially complete cleaning by the high pressure cleaning and then subjecting it to a pretreatment step through a smoothing treatment. Furthermore, the coating composition has excellent waterproofing properties as well as excellent adhesion, as described above. Thus, the coating composition can be applied to a uniform thickness using a brush, a roller, an air spray, an airless spray or the like without applying a primer to the base It is possible to form a waterproof coating film adhered and adhered perfectly to the base surface. Since the coating composition has excellent adhesion strength to the wet surface and excellent thermal elasticity, the waterproof coating film can be formed by applying the wet concrete surface, the hot water tank, the underground water tank, and the base surface undergoing condensation.

At this time, it is possible to apply several times so as to be applied with a desired thickness according to the type and condition of the base surface, but it is possible to form a film thickness of 200 to 400 탆 by applying once, Can be formed, and it is possible to exhibit economical effects in terms of time and cost.

Further, the formed waterproof coating film may be subjected to high-pressure washing. When the high pressure washing step in which the coating film formed thereon does not contain a trace amount of impurities is performed, the waterproof coating film is completely adhered to and adheres to the base surface with excellent adhesion force, . The high-pressure cleaning is performed by using a rotary nozzle at a pressure of 150 to 200 bar to clean the entire coating, so that the foreign matter adhered at the time of construction for forming the coating film can be sprayed from the side, so that a trace amount of impurities does not exist .

In addition, in the case of a concrete structure, it is preferable to apply a waterproof method suitable for the characteristics of the concrete. In another aspect of the present invention, there is provided a method of manufacturing a concrete structure, Forming a permeable coating layer on the cleaned surface by applying an inorganic silicate based permeable coating to the surface of the concrete structure to increase the strength of the surface of the concrete structure; Smoothing the formed permeable coating film; And a step of forming a waterproof coating film on the top surface of the smoothed and permeable coating film to coat the coating composition with a waterproof coating composition for wet coating having excellent chemical resistance.

First, a high-pressure washing step is performed, as described above.

Next, the step of forming the permeable coating film may include applying the inorganic silicate-based permeable coating to the cleaned surface to strengthen and protect the surface layer of the concrete structure by reacting the permeable paint with the concrete to increase the strength of the concrete .

Preferably, the permeable coating comprises from 30 to 40% by weight of inorganic silicate, from 40 to 50% by weight of silane mixture and from 10 to 30% by weight of additive. The inorganic silicate may include an alkali silicate such as potassium silicate or sodium silicate. The permeable coating further includes a silane mixture to further improve watertightness, water resistance and water repellency of the concrete. In other words, by reacting with the carbon dioxide component of the permeable paint containing the inorganic silicate or silane mixture and the concrete of the concrete, the calcium hydroxide in the concrete is transformed into the insoluble calcium silicate to improve the water resistance and strength by suppressing the neutralization and aging of the concrete by making calcium carbonate into calcium carbonate. . In this case, when the inorganic silicate and the silane mixture are contained in the above range, the effect of improving the water tightness and water resistance is insufficient and the effect of increasing the strength of the concrete is insufficient. Therefore, it is preferable to use them appropriately within the above range.

Next, the smoothing treatment step is a step of smoothly processing the upper surface of the formed permeable coating film. The protruded portion of the permeable coating film is removed, and the fine surface is plastered to flatten the base surface, thereby obtaining a smoothest working surface A smoothing process is performed so as to perform the smoothing process. By this smoothing treatment, the waterproof paint is applied to the upper surface of the permeable coating film to a predetermined thickness to form a smooth coating film having a constant thickness, so that not only resistance to cracks but also adhesion to the permeable coating film can be increased do. More preferably, in the smoothing treatment, the crack face itself can be foamed as a whole by applying a grouting method, and a fine portion can be filled and flattened by using a putty or the like.

Next, in the step of forming the waterproof coating film, the waterproof coating composition is applied to the upper surface of the permeable coating film to form a waterproof coating film. As described above, the waterproof coating composition includes a ceramic network-structured resin mixture and is excellent in chemical resistance and exhibits high adherence. It is excellent in waterproofness, waterproofing performance and heat elasticity. Of course, it has excellent adhesion and it is applied to uniform thickness by using brush, roller, air spray, airless spray, etc. without applying additional primer on the top of the permeable coating which increases the strength of concrete. Thereby forming a waterproof coating film adhering to and adhering thereto.

At this time, it is possible to apply several times so as to be applied with a desired thickness according to the type and condition of the base surface, but it is possible to form a film thickness of 200 to 400 탆 by applying once, Can be formed, and it is possible to exhibit economical effects in terms of time and cost.

Further, the waterproof coating formed on the base surface of the concrete structure may be subjected to high-pressure washing. Since the waterproof paint composition is formed with a waterproof coating film adhered to and adhered perfectly to the base surface by the excellent adhesion of the waterproof coating composition, the coating film is not detached even by such high pressure cleaning. The high-pressure washing is as described above.

Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited thereto.

Examples 1 to 3 Preparation of reticulated acrylic resin

In the present embodiment, a reaction process of modifying an acrylic resin into a special network type was carried out according to each condition, and the properties thereof were measured.

Concretely, 3 g of the surfactant and 600 g of ion-exchanged water were mixed, and the mixed mixture was heated to 80 캜 while stirring at 100 RPM to prepare samples 1 to 3. In each of the examples, 4 g of the initiator and 1400 g of the acrylic monomer mixture pre-emulsion were added and reacted. After aging at 70 ° C for 90 minutes, the pH of the aged mixture was adjusted to 9, 30 g of crosslinked polymer was added, Followed by stirring to complete the resin.

The reaction conditions are as follows.

Example 1 A sample was prepared by mixing 1400 g of the acrylic monomer mixture pre-emulsion at a time and reacting. The sample of Example 2 was reacted with 1400 g of the acrylic monomer mixture pre-emulsion for 3 hours while the sample of Example 3 was reacted with the acrylic monomer mixture free 100 g was added to 1400 g of the emulsion, followed by a first reaction for 15 minutes and a second reaction with dropping the remaining 1300 g for 3 hours.

The results of measurement of physical properties are shown in Table 1 below.

Test Items Test Methods Example 1 Example 2 Example 3 Mirror gloss KS M ISO 2813
200 μm on glass plate 60 62 67 Scratching hardness
(Pencil method) KS M ISO 15184
Pencil light pencil hardness 2B B H Abrasion resistance (mg)
(Abrasive wheel method) JIS K 5600-5-9
Wear Wheel CS-17
Load 500 g × 2 · 1000 rotations 71 73 82 My method KS M ISO 2812
Immersed in tap water for 168 hours clear clear clear Alkali resistance KS M ISO 2812 Sodium carbonate 5% aqueous solution for 168 hours clear clear clear Acid resistance KS M ISO 2812 Immersed in a 5% aqueous solution of sulfuric acid for 168 hours clear clear clear Water temperature After immersing in hot water at 70 ° C for 48 hours, drying clear clear clear Formaldehyde dissipation JIS K 5970 Desiccator method 0.10 mg / L
Below 0.10 mg / L
Below 0.10 mg / L
Below Network structure Morphology

As can be seen from the above Table 1, the performance of Example 3 in which the acrylic monomer mixture preliminary emulsion was added all at once or slowly added dropwise and subjected to the modification reaction in the form of a special network in the first and second stages, It can be confirmed that the network-structure acrylic resin produced according to the present invention can remarkably improve the adhesion to the surface of the construction by forming a special network-like structure.

<Preparation Example> Preparation of a waterproof coating composition containing a ceramic-based network-structured resin mixture

Table 2 shows the composition and blending ratio of the coating composition. The main part and the curing agent part were prepared by the following method.

The topical part was prepared by putting a ceramic resin as a main resin into a proper amount of tank, partially dispersing the base resin, the network-structured acrylic resin mixture, the ceramic powder and the surfactant in a separate container, The dispersion mixture in the container was put into a tank containing the ceramic resin again, and the remaining network-structured acrylic resin mixture, ceramic powder and surfactant were further added and dispersed to prepare a ceramic network-structured resin mixture.

Next, 6 to 10 were charged into the tank, and stirred at 700 to 1000 rpm for 90 to 100 minutes. Then, the mixture was toned with 5 coloring agents, the defoaming agent and the denaturant were added thereto, and the mixture was stirred at 700 to 800 rpm for 30 to 40 minutes.

The curing agent part was charged with a proper amount of modified amine resin, and then the ceramic based extender pigment, defoaming agent and denaturant were added while stirring, and the mixture was stirred at 700 to 1000 rpm for 90 to 100 minutes to prepare a curing agent part.

NO Item name Composition ratio (weight g)) Topic section One Ceramic system
Network structure
Resin mixture Ceramic resin 40 to 70 2 Reticulated acrylic resin mixture 5 to 10 3 Ceramic powder 10-20 4 Surfactants 1-5 5 Colorant 3 to 5 6 Colored pigment 3 to 5 7 Ceramic type extender pigment 10-20 8 Non-reactive diluent 3 to 5 9 Defoamer 1-3 10 Denitration agent 1-3 Hardener part One Denatured amine resin 50 to 70 2 Ceramic type extender pigment 10 to 30 3 Defoamer 1-3 4 Denitration agent 1-3

&Lt; Experimental Example > Evaluation of physical properties of a waterproof coating composition comprising a ceramic network-structured resin mixture

A waterproof coating composition was prepared according to the preparation examples as shown in Table 3, except that the composition of the ceramic-based network-structured resin composition in the subject part was varied.

NO Item name Experimental Example 1
(G) Experimental Example 2
(G) Experimental Example 3
(G) One Ceramic system
Network structure
Resin mixture Ceramic resin 45 50 30 2 Reticulated acrylic resin mixture 9 3 13 3 Ceramic powder 20 20 22 4 Surfactants One One One 5 Colorant 5 6 5 6 Colored pigment 3 3 3 7 Ceramic type extender pigment 10 10 10 8 Non-reactive diluent 5 5 5 9 Defoamer One One One 10 Denitration agent One One One Sum 100 100 100

The test results of the waterproof coating composition prepared above are shown in Table 4 and Figs. 1 to 3.

division Experimental Example 1 Experimental Example 2 Experimental Example 3 Test Methods Topical viscosity (25 ° C / cps) 12,000 20,000 8,000 Electronic viscometer Curing agent Viscosity (25 ° C / cps) 1,500 1,500 1,500 Electronic viscometer Flowability (400 탆) Good Malfunction Malfunction Flow Tester: Segmeta Underwater construction Good Good Malfunction ks f 4921: 2011 Hardness 87 72 80 Hardness meter Wet adhesion Very good Good Good ks f 4921: 2011 Impact resistance clear Galajim crack ks f 4921: 2011 Thermal elasticity Very good Malfunction Malfunction Workability Good Malfunction Good ks m 5000: 2014 Permeability Good Malfunction Good ks f 4921: 2011 Moisture resistance Good Malfunction Good ks d 8502: 2010 Hot water tank (100 ℃, boiling water) Good crack crack ks d 8502: 2010 Stainless steel, FRP, cast iron possible possible Turn Winter season construction conditions possible Fire Fire Basement Construction Conditions possible possible Fire Flammability Good Malfunction Good ks f 2271: 2006
ks f iso 1182: 2004

As shown in Table 4, in the case of the coating composition (Experimental Example 1) according to the present invention, the viscosity and flowability were better than those of Experimental Examples 2 and 3 in which the content of the network-structured acrylic resin mixture was low or high, It was confirmed that the work was good also in stainless steel, FRP, cast iron and hot water tank of 100 캜. In particular, in Experimental Example 1, it was confirmed that, unlike Experimental Examples 2 and 3, a coating film excellent in wet adhesion and excellent in hardness was formed. In the case of Experimental Example 1, as compared with Experimental Examples 2 and 3, it was confirmed that it exhibited excellent physical properties in terms of impact resistance, thermal elasticity, workability, water permeability and moisture resistance.

As can be seen from Figs. 1 and 2, when the coating composition of the present invention is applied to the inner coating of the water-soluble member, the taste, odor, color and turbidity are at a level satisfying the regulations, and heavy metals and toxic substances are almost And it is confirmed that the weight loss of residual chlorine does not occur. As a result, it can be confirmed that it has excellent wet adhesion and does not elute in the water flowing inside the water supply member, and has excellent physical properties such as heat resistance, salt water resistance and solvent resistance .

Claims (5)

A subject comprising 55 to 100 parts by weight of a ceramic network-structured resin mixture, 3 to 5 parts by weight of a non-reactive diluent, 5 to 20 parts by weight of a ceramic-based extender pigment, 3 to 5 parts by weight of a colored pigment and 1 to 3 parts by weight of a defoamer; And
50 to 70 parts by weight of a modified amine, and 10 to 20 parts by weight of an extender pigment,
The subject and the curing agent are mixed at a ratio of 1 to 5: 1,
Wherein the ceramic network-structured resin mixture contains a ceramic resin, a network-structured acrylic resin mixture, a ceramic powder and a surfactant in a weight ratio of 40 to 70: 5 to 10: 10 to 20: 1 to 5,
Wherein the reticulated acrylic resin mixture comprises 40 to 50 parts by weight of a network-structured acrylic emulsion resin, 3 to 5 parts by weight of a defoamer, 10 to 20 parts by weight of water, 1 to 3 parts by weight of a cryoprotectant and 1 to 3 parts by weight of an antiseptic agent,
The network-structured acrylic emulsion resin may contain,
(i) mixing a surfactant with ion-exchanged water and raising the temperature thereof with stirring to prepare a first mixture; (ii) adding a pre-emulsion and an initiator of an acrylic monomer mixture comprising an acrylic or methacrylic monomer having an aliphatic group, an acid monomer, a surfactant, and ion-exchanged water to the first mixture and reacting to prepare a second mixture; (iii) preparing a third mixture by aging the second mixture and adjusting the pH thereof, and (iv) adding a crosslinking polymer to the third mixture to adjust the physical properties thereof,
In the step (ii), 5 to 10% by weight is added to 100 parts by weight of the acrylic monomer mixture pre-emulsion, and then the first reaction is performed for 5 to 20 minutes. The remaining 90 to 95% , And a second reaction is carried out to produce a second mixture.
Wherein the water-repellent coating composition comprises a ceramic-based network-structured resin mixture. delete The method according to claim 1,
The modified amine is a modified aliphatic amine, a modified aromatic amine, or a mixture thereof,
Examples of the modified aliphatic amine include diethylene triamine (DETA), triethylene tetramine (TETA), diethylamino propyl amine (DEAPA), menthane diamine (MDA), N- At least one selected from the group consisting of N-aminoethyl piperazine (N-AEP), M-xylene diamine (MXDA) and isophorone diamine (IPDA)
The modified aromatic amine may be at least one selected from the group consisting of meta phenylene diamine (MPD), diaminodiphenyl methane (DDM), and diaminodiphenyl sulfone (DDS) doing,
Wherein the water-repellent coating composition comprises a ceramic-based network-structured resin mixture. A pretreatment step of the substrate surface subjected to high pressure washing and smoothing treatment; And
And forming a waterproof coating film for applying the coating composition according to any one of claims 1 to 3 to the pretreated base surface using the waterproof coating composition for wet coating. High pressure washing of the base surface of the concrete structure;
Forming a permeable coating layer on the cleaned surface by applying an inorganic silicate based permeable coating to the surface of the concrete structure to increase the strength of the surface of the concrete structure;
Smoothing the formed permeable coating film;
The method according to any one of claims 1 to 3, wherein the waterproof coating composition is applied to the top surface of the smoothed and permeable coating film.

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