KR100661210B1 - Silicone resin emulsion membrane and manufacturing method having infiltration, hydrophobicity and penetration - Google Patents

Abstract

The present invention relates to a silicone resin emulsion coating material which is applied to a structure to form a coating, and a method of manufacturing the same. In one embodiment, a composition for forming a coating film for waterproofing water repellency of a structure, comprising a liquid phase containing a silicone emulsion as a main component A binder and a powder containing cement and aggregate; The content of the silicone emulsion is an active content of 4 to 17% by weight based on the weight of the cement, the mixing ratio of the cement and the aggregate is 1: 0.5 to 1: 5 by weight ratio, the penetration and water repellency and waterproof properties The eggplant is provided with a silicone resin emulsion coating material (SRM / SREM: Silicone / Silicone Resion Emulsion Membrane).

Water Repellent, Water Repellent, Waterproof, Protective Film, Silicone Resin Emulsion, Cement, Aggregate, Acrylic Emulsion, Structure, Silica

Description

Silicon resin emulsion membrane and manufacturing method having infiltration, hydrophobicity and penetration

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 is a penetration state diagram after the silicone resin emulsion coating material according to the present invention is applied to the structure.

2 to 7 are photographs showing the various properties of the silicone resin emulsion coating material according to the present invention in comparison with a conventional test specimen.

<Explanation of symbols for main parts of drawing>

10: structure

21: silicone emulsion particles

22: cement particles

23: aggregate particles

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective coating material which is applied to a structure to form a coating, and more particularly, to a method of manufacturing the protective coating material. It is to enable waterproofing and watering.

In addition, the present invention is a silicone resin coating material having a water-repellent function and a waterproofing property that has a hydrophilicity formed on the surface of the coating material to prevent the adsorption of various organic pollutants and obtain interfacial adhesion, and a method of manufacturing the same and a structure coated with the coating material It is about.

As soon as the structure is constructed, it is gradually aging due to the action of various forms of water. In particular, there is a difference in the degree of cracking, but it provides a passage for rain, rain, water vapor (condensation), condensation (condensation), etc. Provide the cause of deterioration.

In the case of external water (rain, condensation, etc.) that contributes to the deterioration of the structure, residual calcium hydroxide (Ca (OH) 2) dissolved in the multipores inside the concrete acts as an outflow passage to the outside, and dioxide in the air after surface accumulation Reaction with carbon causes crystallization of white insoluble limestone (CaCO3), leading to whitening and whitening, which degrades the appearance of exposed cotton.

Surfaces that are wet or contain a lot of water cause freezing, and the formation of ice crystals with increased volume creates pressure inside the structure, causing surface and structure rupture.

In the case of reinforced concrete structures, cross-sectional loss, concrete peeling, and strength decrease due to expansion pressure generated by corrosion of internal reinforcing bars due to moisture penetrated from the surface, thereby deteriorating durability of the structure.

On the other hand, condensation caused by condensation of water vapor by the correlation between temperature and moisture is classified into surface condensation appearing on the surface of the structure and internal condensation occurring inside. Compared to the surface condensation that is easy to identify with the naked eye, the internal condensation lowers the insulation effect and is contaminated by microorganisms such as mold and moss, thereby gradually aging the structure.

Therefore, various methods have been applied to ensure the long-term stability of the structure and to protect the structure from the effects of moisture acting on the surface. The most common form is to form membranes such as membrane type, penetration or saturation type, coating type, paint type, etc., which have barrier properties and waterproofness on the surface of the structure.

Conventional protection methods are mostly the construction of barrier layers to change the erosive environment or to separate concrete from these environments. By altering or separating the operating environment, the protective measures are prolonged and the service life is also good for the user.

Various methods, such as coating, impregnating material, coating film, joint sealing material, and grout injection method, are used to form the barrier layer. The following is a brief description of each process and a summary of typical applications.

The application impregnation method is a method of protecting the surface of concrete by using a material having the property of penetrating into the pore structure of concrete. There are three types: hydrophobic, partial filling, and filling. . All of these change the behavior of the surface, such as the rate of water vapor passage and the rate of liquid absorption. This method is used to block chloride and carbon dioxide or to prevent damage by freezing and thawing.

The method of impregnating the material on the concrete surface is generally used to prevent the inflow and outflow of moisture and water vapor into and out of the concrete. In order to apply the application impregnation method, the surface should be clean so that concrete can absorb the solution. To meet these conditions, voids and capillaries are required, which requires abrasive blasting, shot blasting, and hydraulic blasting. That is, there is a limit that the variation in performance is large depending on the surface treatment and the state of the base surface.

The protection mechanism includes a hydrophobic compound (soluble / water-soluble organic compound) in the pores, so that the concrete surface resists water. Silane and siloxane are most commonly used as hydrophobic compounds. These compounds penetrate into the pore structure by attraction force. The application of silanes or siloxanes to the surface of the concrete causes chemical reactions with the silicates of the concrete, leading to the passage of water vapor or formation of barrier layers to prevent water and harmful substances.

The waterproofing / water repellent method of the structure surface is made of silicon (siliconate, silane, siloxane, organo siloxane, silicate and derivatives thereof) using a permeable liquid material having a low molecular structure, which is applied to the surface to increase the surface contact angle to make the water splash. It is a way to protect the structure by giving water repellency. In the case of building structures, most of them are applied to red brick and cement surface to give surface water repellent effect, and the depth of penetration is important when applied to civil structures.

The silicon-based material applied lacks resistance to chemical deterioration. It is difficult to maintain long-term durability performance due to easy molecular structural breakdown by ultraviolet rays. The most commonly applied organosiloxanes exhibit relatively short periods of performance within about six months of exposure to the outdoors, and in particular, organic surfaces (such as smoke, dust, dust from industrial waste, etc.) are exhibited because the applied surface exhibits strong hydrophobic properties. It is easy to attach and the surface stain phenomenon occurs and it acts as a factor which hinders aesthetics.

In order to solve these problems, it is mainly applied to the surface where natural light does not reach, but it is compatible with heterogeneous materials when applying the ground surface of civil structures with high humidity and high moisture due to the characteristics of oil-soluble solvent and oil-soluble silicone. It is difficult to express and maintain performance due to insufficient penetration.

The coating method is a method of constructing a material that forms a thin film on the concrete surface, many organic or inorganic materials can be used. The coating is intended to prevent water absorption and the passage of water vapor and also to protect the concrete surface from erosive liquids or water. This method is mainly used to block chlorides, chemicals or carbon dioxide, to prevent freeze-thawing and to enhance aesthetics.

Many types of chemicals are used in concrete protective coatings and are structured to suit a wide range of exposure and use conditions. In general, the limitations in application are as follows.

① Materials and construction methods should be selected according to the conditions of use and exposure conditions. ② The method of surface treatment should be determined when applying the repair materials. ③ Determine the required number of coatings and construction rate according to the condition and condition of the surface, and set the proper number of coatings for the coating without pinholes. ④ Treatment for cracks generated on the surface and prevention of cracks after construction To select. ⑤ In order to exhibit sufficient performance, it is necessary to consider the performance and construction characteristics of materials such as surface treatment and conditions, adhesion performance, coating thickness, etc. to achieve the desired performance.

Surface coating method is a method of forming a uniform and uniform thickness of the waterproofing and repair materials on the concrete surface. This technique is also known as overlay, rendering, plastering, and jacketing. In general, this method is applied by plastering, brush, and roller when working by hand, and by using a machine such as spraying using compressed air, airless spray, plaster extrusion / spraying, and the like. It is used to change water vapor transmission rate, liquid absorption rate, deterioration effect by chemicals, and texture of cotton.

This method is mainly used for the waterproofing of interior structures and underground structures in the case of waterproofing materials, and in the case of repairing materials, it is used for overlaying the top of bridges, constructing the barrier layer to prevent chemicals or neutralization. Consideration should be given to the effect of cracking on the surface.

For the protection of concrete, the construction is done in a relatively thick layer, and there are various uses, and various materials and construction methods are used. Applicable materials include epoxy resin, silica sand, methacrylate and silica sand, steel fiber reinforced Portland cement concrete, latex-added Portland cement concrete for surface coating of factory floor, epoxy resin for recoating of vertical surface for chemical resistance coating. And silica sand and latex-added Portland cement concrete.

The disadvantages of the surface coating method are that the performance variation is large depending on the jointness of the material selection according to the applied part and application, and it is not easy to secure sufficient adhesion between the old and new materials, and the coating material is also resistant to cracking when existing structures and materials are cracked. This lack causes a chain cracking phenomenon.

The application of the elastic coating material is a method of constructing a material for forming an elastic rubber film on the concrete surface. Examples of the elastic rubber coating material include a heating type, a polymer type liquid, a preformed material, and the like. The most important function of the coating is to minimize the liquid absorption of the concrete. The coating film is different from the coating in that it can be stretched or bent without being ruptured, and is mainly used for waterproofing bridge tops, square tops and underbeds through which vehicles pass.

Elastomeric coatings are used to prevent liquid from entering through concrete interiors, cracks, and sometimes joins, and generally are formed of sheet materials or materials constructed in a liquid state. Sheet materials include polyethylene, PVC, polyethylene, neoprene, asphalt, modified asphalt, rubberized asphalt, and rubber asphalt attached to butyl.

The liquid type coating film is a method in which a material containing a chemical substance of a heating type, a hydrocurable type, or a two-liquid curing type is added or poured on site. These materials (mainly heated asphalt, room temperature asphalt, chloroprene, polyurethane, etc.) cure at the same time as curing and form a smooth surface. Such a material is excellent in elasticity, so it may be applied as a function of protecting the crack or joint.

Under the conditions of use and exposure conditions, the elongation capacity of a particular material or system varies depending on the elongation of the material, the thickness of the coating film to be formed, and the length of the coating material between the unattached portions of the gap, such as cracks.

The waterproof coating is a polymer-based organic monolayer, which is a method of forming an impermeable constant thickness coating through the crosslinking of urethane and polyisocyanate, and is a cement-containing polymer coating waterproofing material having a mixed form of inorganic and organic. The main component is organic matter, and the organic type is mixed with the water-soluble emulsion in which the oil phase liquid is emulsified in water (O / W type) or water is oil phase liquid (W / O type) using various emulsifiers. The method of forming a continuous film by binding cement particles and spherical polymers by forming a continuous film by hydration of the cement by the cement, and as a liquid or solid asphalt (rubber-based asphalt, emulsified asphalt) Structures are formed from the action of external moisture and various waters by pre-processing the form in the field and applying it to the surface. It will serve to protect the membrane.

Such a film-type protective material may not only lower the structure protection function when the formed film is damaged by cracks, fractures, breakages, or swellings caused by various causes such as static and dynamic movements of the structure and surface movement of internal moisture. Rather, water intrusion causes leakage. This method has no clear measures to protect against damage factors caused by physical and chemical degradation of the coating itself.

In the case of external insulation system, which is composed of cement-based adhesive on the wall of the structure, the insulation material (Schirofoam) is fixed by the adhesive method, and the cement-based base material, the reinforcement cement-based coating material, the pattern forming material, and the protective finish material in the order of the exposed surface. Silicone emulsion is partially mixed and applied to the pattern forming material, but it is applied in the form of additives because of maintaining the surface pattern forming effect and economic efficiency.

The emulsion of silicone added to these treatments is applied as an additive to express additional performance. Due to the property of maintaining the stability of the color pattern, it is required to apply a material with excellent contamination resistance, but the surface hydrophobicity of existing materials It does not meet the practical requirements of pollution due to organic matter and rapid performance manifestation.

If the outer wall of the structure is composed of ground adjustment plaster, adhesive, and tile, the water absorbed through the message between the tiles penetrates into the tile and adhesive interface, the adhesive interface and the ground adjustment material, and the interface of the ground adjustment material and the surface of the structure. Moisture) causes problems such as lifting, peeling, falling off due to the action of expansion pressure due to freeze-thawing.

In order to solve this problem, liquid-type water repellents are applied to the surface, or a strong amount of alkali-siliconate (calcium silicate, sodium siliconate, etc.) mixed with cement is applied in a strong alkaline condition, It is not easy to secure the performance by applying a large amount of dilution, and in particular, the silicone-based surface of the exposed surface is insufficient as a method of securing the vertical stability due to the deterioration effect by ultraviolet rays.

Improving water repellency using film-type materials, silicon-based penetration materials, and silicone-based additives that have been applied in the past, various types of surface protection methods such as external insulation materials and cement-miscible water-soluble dilution-based silicones form impermeable layers or impart hydrophobicity to surfaces. It has been put into practical use as a partial functional element such as giving a water repellent effect in terms of functionality.

In the case of the prior art, 'Korean Patent No. 1983-0002407' using silicone resin is related to the manufacture of waterproofing materials for representative cement admixtures, but it is limited to the role of reducing the absorbency by adding a small amount of silicone resin. . In addition, in order to have a waterproof performance against water pressure, it is necessary to form a thick film and the compressive strength ratio is 96%. The higher the amount added, the lower the strength, while the absorption resistance is relatively higher. This phenomenon is a technique that utilizes a partial addition method to supplement the silicone resin, silicone emulsion function, the strength degradation phenomenon is the most common problem.

Prior art 'Korean Patent No. 2001-0057550' applying a silicone emulsion relates to an aqueous coating composition. By adding a silicone emulsion in the coating composition, it is used for the purpose of improving the rheological properties of the coating and the interfacial adhesion of the old coating film. In addition, the amount of the addition is limited to 0.5 to 10% by weight based on the coating composition to ensure storage stability. What is applied to the known technology is a silane-coupling agent used to improve the interfacial adhesion between organic and inorganic materials, and the additive effect is in controlling fluidity and securing interfacial adhesion.

Prior art 'Korean Patent No. 1997-0000942' relates to an organopolysiloxane-alkyltrialkoxy silane emulsion for impregnation of siloxane-silane emulsion structured fiber-reinforced cement components. The emulsions prepared by the prior art are applied for the water-soluble impregnation of structural fiber-reinforced cement components.

Prior art 'Korean Patent Registration No. 0332543' is a prior art relating to a silicone emulsion aqueous water repellent, waterproof, anti-condensation agent and a method for producing the same. It relates to a silicone emulsion water-based water-repellent waterproofing condensation preventing agent used in concrete structures such as cement, concrete, brick for construction and civil engineering, and a manufacturing method thereof. The composition prepared by the prior art is included in construction and civil engineering materials such as concrete, brick, etc., so as to penetrate deeply into the substrate and combine it to exhibit excellent water repellency, water resistance, and anti-condensation (absorption prevention) after drying, thereby preventing aging of the substrate. Not only does it improve durability for a long time.

Prior art `` Japanese Patent Application Laid-Open No. 06-234919 '' refers to an organo silicone emulsion for water repelling porous surfaces, such as brick, block, stone, concrete, or wood, especially wind-driven rain. It aims to prevent the penetration of water by the impact energy of rain drops. The treatment method for securing the performance is applied to the method of impregnating the liquid coating on the surface, characterized in that the storage stability of the liquid and the surface is not colored.

Common features appearing in the prior art is not only a technique for preparing a water-soluble emulsion of the oil-soluble material, but also in accordance with the public process, that is, the conventional water repellent treatment method of the liquid coating method and the common material supply method that penetrates after the surface coating method, performance The expression method also utilizes the technical principle of penetrating the applied liquid to form an internal waterproof layer. In addition, the water repellency by the hydrophobic coating to impart water repellency, waterproofing, condensation prevention and surface strength retention characteristics have not escaped the limitation of the conventional silicone-based water repellency imparting material utilization.

In addition, in the case of the film forming material (paint, paint, etc.), the silicone derivative is used, but addition to satisfy the functional effect, that is, control of fluidity, securing of interfacial adhesion, etc., and in the case of waterproofing material, it provides absorption resistance by surface water repellency ( Oil-based water repellent), but only for the purpose of providing limited performance.

Accordingly, the present invention is to solve the problems of the prior art as described above, to form a film using a silicone emulsion and inorganic powder having excellent cement miscibility as the main binder, the surface of the formed film is hydrophilic, The coating material composition forms a hydrophobic film having a hydrophobic property inside the ash and a waterproof hydrophobic film by the penetrating silicone component, and a watertight layer is formed on the hydrophilic surface, the waterproof and waterproof coating material, and the base surface by using the same. An object of the present invention is to provide a multifunctional silicone resin emulsion coating material (SRM / SREM: Silicone / Silicone Resin Emulsion Membrane) exhibiting water vapor permeability and water absorption resistance.

The silicone resin emulsion coating material according to the present invention exhibits performance by a step of coating treatment → penetration → hydrolysis → condensation, reaction with a substrate → water repellent, and a waterproofing layer on the structure surface.

The application method can be applied by roller, spray, brush, etc. or mixed with cement, and it is suggested that it can be deposited. In the performance evaluation, absorption resistance and water permeability tended to be excellent as the coating amount increased, and in the case of the compressive strength (%), there was no drop in strength of 98 to 102 regardless of the coating amount.

In the case of absorption resistance, the higher the application amount, the more pronounced the phenomenon was. The weather resistance was evaluated by measuring the surface contact angle of the water droplets after the accelerated treatment. The greater the coating amount, the larger the contact angle was, and it was evaluated that there was no change before and after the weather resistance test.

In addition, the present invention forms a stable matrix structure when cement admixture, by applying a silicone emulsion having no strength deterioration phenomenon as a binder, the internal silicon component formed by the film penetrates by the adsorption force of the structure to form a hydrophobic layer of the surface portion of the structure, the inside of the coating material The remaining silicone component causes the coating material to exhibit hydrophobicity. In addition, the surface of the coating material provides a silicone resin emulsion coating material that expresses hydrophilicity by the hydration reaction between the auxiliary binder and the cement, which simultaneously imparts structure penetration, hydrophobicity inside the coating material and immersion of the surface.

The film-forming material is mixed with a powder composed of a cement-based binder, cement, aggregate, and other additives by applying a variety of construction methods such as brushes, rollers, plastering, spraying, and spraying on the surface of the structure, so that various types of soluble / insoluble materials are available. Provides a hydrophilic surface to protect the structure from harmful substances (excellent, acid rain, organic dust, etc.) and to apply various finishing materials (finish colored paints, multi-layered paints, waterproof coatings, plasters, tile adhesives, etc.) on top of coating materials do.

In addition, in the present invention, the coating material formed on the surface of the porous inorganic material exhibits water repellency / water resistance inside to block leakage and infiltration of rainwater due to cracks, and the surface of the finishing material maintains hydrophilicity, soot, gasification, and atomized organic matter. It prevents adhesion of contaminants generated by discharges, and ensures the watertightness of the surface of the structure by the penetration of the silicone resin component, which is the main material of the coating material, into the surface of the structure, thereby preventing the effect of moisture entering into the structure. It provides a hydrophilic / water-repellent / water-absorbent low-absorptive film-forming material and colored finish with functionalities such as eliminating problems such as dropping, dropping, and securing long-term durability.

Specific means of the present invention for achieving the above object,

In the protective film material for forming a film for waterproof water repellent of the structure,

A liquid binder mainly composed of a silicone emulsion, and a powder containing cement and aggregate; The content of the silicone emulsion is an active content of 4 to 17% by weight relative to the weight of the cement, the mixing ratio of the cement and the aggregate is characterized in that consisting of 1: 0.5 ~ 1: 5 by weight.

In addition, according to the present invention, the silicone emulsion is selected from any of a mixture of Alkyl-based or Tri-ethoxy-based silicon resin, alkylalkoxy-based or ethoxy-based Silane, Siloxane, Silane / Siloxane.

In addition, according to the present invention, the active ingredient content of the silicone emulsion is characterized in that 40% to 80% by weight.

According to the present invention, the Silane is selected from any one of Tri-ethoxy (2,4,4-tri-methyl-pentyl) silane, Alkyl-ethoxy silane, Alkyl alkoxy Silane, Tri-ethoxy-octyl-Sil It is done.

In addition, according to the present invention, the Siloxane is selected from any one of Amino alkyl-functional Poly-di-methyl siloxane, alkyl alkoxy Siloxane, Organomodified siloxanes or a mixture thereof.

In addition, according to the present invention, in order to stabilize the matrix structure of the cement, any one co-binder selected from Styrene-Acrylic Emulsion, Pure-Acrylic Emulsion, SBR-Latex, EVA Emulsion, Acrylic-EVA copolymerization Emulsion, etc. It is characterized in that it is added in the range ~ 16% by weight.

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

The silicone resin emulsion coating material (SRM / SREM: Silicone / Silicone Resin Emulsion Membrane) according to the present invention is composed of a liquid binder composed mainly of a silicone emulsion and a cement-based inorganic powder in an appropriate weight ratio. In this case, a cobinder may be added to form a firm film. Cement-based inorganic powder is mainly composed of cement and aggregate, in this embodiment, the aggregate is silica.

The silicone emulsion is a binder of cement-based inorganic powder, has excellent compatibility with cement, and can be applied by mixing the powder and the liquid when applied in the field to achieve the performance and effect of the present invention.

Silicone emulsion as the main binder may be selected from any of a mixture of Alkyl-based or Tri-ethoxy-based silicon resin as resin type, alkylalkoxy-based or ethoxy-based Silane, Siloxane, Silane / Siloxane as monomer type.

As such, the present invention utilizes the low molecular structure of the silicone emulsion to infiltrate, watertight, and water-repellent coatings to simplify construction methods and treatment methods that are applied by subdividing performance, materials, etc. by existing applications, thereby securing construction efficiency, and excellent water vapor. It is to facilitate the formation of an impervious coating layer having a permeability.

Here, the Silane may be selected from any one of Tri-ethoxy (2,4,4-tri-methyl-pentyl) silane, Alkyl-ethoxy silane, Alkyl alkoxy Silane, and Tri-ethoxy-octyl-Sil. In addition, the Siloxane may be selected from any of Amino alkyl-functional Poly-di-methyl siloxane, alkyl alkoxy Siloxane, Organomodified siloxanes or a mixture thereof.

Here, the silicone emulsion preferably has an active ingredient (silicone polymer) content of 40% by weight to 80% by weight. This is because when the content of the active ingredient is 40% by weight or less, the penetration performance of the surface of the structure is lowered, and when it is 80% by weight or more, the surface strength of the coating material is reduced due to the lowering of the curing reaction.

At this time, the performance required for the silicone emulsion should have a functional group which is particularly compatible with strongly alkaline or weakly alkaline powder and liquid phase, and the material formed by using the silicone emulsion should be applied to improve or not have a decrease in strength.

In the case of the conventionally used silicone emulsion, it is difficult to uniformly disperse when mixing with cement, which is a strong alkali condition, and even if the miscibility is good, strength degradation occurs after curing, making it impossible to apply as a binder.

The content of the silicone emulsion is mixed to have an active content of 4 to 17% by weight of the cement. Preferably 6 to 15% by weight is applied. When the addition amount of the silicone emulsion, the main binder, is less than 4%, the structure surface penetration performance and the internal hydrophobic layer cannot be formed, and when the amount is more than 17%, the curing reaction is inhibited and the surface strength decreases, which is required as a coating material. This is because they do not exhibit strength and waterproof effects.

Referring to the embodiment of the method for producing a liquid phase containing the silicone emulsion is as follows.

<Production of liquid phase>

Add the specified amount of water to the container and add the thickener with stirring at 1600rpm and stir to dissolve uniformly for 10 minutes. Make sure the thickener particles are uniformly loosened in the liquid phase and add ammonia water (28%) to swell the thickener. After addition, the mixture is stirred for 10 minutes for uniform thickening and then thickened. After adding each of the silicone emulsion (trade name: Degussa Tegosivin HE-328) to the liquid phase, the mixture was stirred for 5 minutes to obtain a uniform liquid at 3500 to 4000 rpm, and then the acrylic emulsion (BASF Acronal S-702) was added to each uniform liquid. Prepare a liquid phase.

<Production of powder>

Powder is Silica No. 6 is added to the mixing vessel, Portland cement is added, and then Silica Snad No. 7 is added to perform mixing for 10 minutes.

(1) Silicone Emulsion Selection Test

(2) Auxiliary binder application amount selection test

The liquid binder and the cement-based inorganic powder thus prepared are used as follows to protect the structure.

First, as shown in (a) of FIG. 1, the surface of the structure 10 is maintained in a sufficient dry state.

Next, as in (b) it is applied by mixing the liquid binder and powder. Immediately after application, the silicone emulsion particles 12, the cement particles 22 and the aggregate particles 23 are uniformly mixed.

The next step is to go through steps (c) and (d) over time.

In step (c), the silicon emulsion particles 21 gradually move into the structure 10 by capillary action and adsorption on the surface. Cement particles 22 and aggregate 23 having relatively large particle sizes remain in the liquid phase to form C-S-H Gel.

Next, in the step (d), the film formation is completed, and the concentration of the silicone emulsion is concentrated into the structure, and the concentration gradually decreases to the surface of the coating material. The inside of the liquid phase of the coating material 10 forms a matrix structure by the reaction of cement and water, and forms a more firm coating by the added acrylic component.

That is, when a liquid material is applied to the surface of the structure 10 to form a wet film in the form of a plastering, the silicone emulsion particles 21 having a relatively small particle size included in the liquid phase may be formed by the adsorption action such as moisture. 10) It moves to the inside of the surface.

The silicone resin component moved to the inside has a low concentration of moisture in the structure, and forms a hydrophobic fine polymer film therein through the following chemical reaction.

The polymer film thus formed gives a water repellent surface facing the organic functional group to the outside. The concentration of the silicone emulsion remaining inside the liquid phase becomes higher toward the inside, and the concentration decreases toward the outside, that is, toward the surface of the film.

On the other hand, since the acrylic emulsion particles as auxiliary binders are relatively large, they remain on the inside and the surface of the applied wet film to coalesce (= fusion) between the particles to form a polymer film. For example, in the case of cement, the hydration reaction proceeds due to residual moisture, thereby forming a firm film.

On the other hand, the auxiliary binder used to stabilize the cement-based solid matrix structure can be replaced by using Styrene-Acrylic Emulsion, which can replace Pure-Acrylic Emulsion, SBR-Latex, EVA Emulsion, Acrylic-EVA Copolymerization Emulsion, etc. .

The content of the applied auxiliary binder is based on solids, and should be applied within the range of 6 to 16% by weight of the cement. If it is more than 16%, it does not exhibit the sufficient penetration effect by inhibiting the movement of the silicone emulsion particles, and if it is less than 6%, partial maintenance is difficult due to surface hydrophobicity, making maintenance difficult, and various organic pollutants in the air Because of its plasticity, the resistance to surface contamination decreases and staining occurs over time.

The powder is not particularly limited, but cement may be a general portland cement, and an appropriate amount of alumina cement and gypsum may be mixed to control hardening. In the case of Silica, the surface roughness of the film forming material may be adjusted or workability may be improved. It is adjustable to improve. In the present invention, the weight ratio of cement and silica may be 1: 2, preferably 1: 0.5 to 1: 5.

As described above, the protective coating structure of the silicone resin emulsion coating material and the characteristics of the coating material are as follows.

(A) Surface hydrophilicity

The surface hydrophilic performance is a property for preventing the adsorption of various organic contaminants upon adhesion of paints, mortar finishes and panels after application of the film-forming material of the present invention and the application of external exposure, and to secure sufficient interfacial adhesion of the upper applied material.

In the case of the present invention, as shown in (a) of FIG. 2, the adsorption of organic contaminants was confirmed to be less than that of the existing coating material (the existing ones are relatively black). Peeling and breakage of coating material were reduced.

(B) Hydrophobicity inside coating material

The internal hydrophobicity of the coating material is a function that prevents the elements exposed to the stability of the structure by preventing leakage of water due to damage and damage of the hydrophobic film due to physical impacts of various forms. That is, even if there is a partial breakage, it is a property of preventing the ingress of moisture by the hydrophobic property inside the coating material.

As shown in FIG. 3 (a), the present invention shows hydrophobicity as water droplets that are prevented from invading the water as compared to FIG. 3 (b), whereas the existing test body (b) absorbs water.

(C) background material permeability

It is a function to prevent the inhibiting elements of the structure by leaking water due to moisture when the structure crack occurs. Unlike the conventional FIG. 4 (b), the hydrophobic layer formed to prevent the movement of moisture due to the inevitable cracking increases the contact angle (surface tension) of the water, thereby weakening the water contact and capillary phenomenon. Block base material penetration.

(D) Interface adhesion

It was evaluated according to the adhesion strength test method of KS F 4918 (Silicone-based coating waterproofing material). In the composition of the present invention, the main component contained in the silicone emulsion is sufficient adhesion by acting as a coupling agent to improve the adhesion of the interface in addition to the penetration property. Have performance. In the case of the present invention, the adhesion strength was found to have an interface adhesion of 10.0 kg / cm 2 or more. In the case of Figure 5 (a) of the present invention, the coating material is markedly increased the adhesive force compared to the existing test specimen (b).

(E) Water absorption prevention and permeation performance

Water absorption prevention effect is not the effect of water pressure, but the water absorption resistance of the structure itself as a property to prevent the chemical degradation of the structure by preventing the intrusion of soluble harmful substances, Figure 6 (a) according to the present invention is water absorption In the case of the general test specimen of Fig. 6 (b), there is no absorption resistance. In the case of the test specimen of the present invention, there was no change as 65 mm, but in the case of the general applied specimen, head reduction occurred at 45 mm.

On the other hand, water permeability is a water leakage phenomenon occurs by the inflow of water in accordance with the water tightness of the structure when the water pressure acts. However, in the present invention, the action of water is not transferred directly into the structure, thereby achieving a waterproof function.

(F) compressive strength

The strength tendency was evaluated by fabricating a test specimen of 50 × 50 × 50 mm by judging the tendency of hardening density and structure by the silicone emulsion as the main binder when forming the coating material. The curing period of the test body was evaluated after 14 days of standard condition curing, and as a result, it was found that Examples 6, -7, and -8 had a relatively stable strength property of 200 or more. In general, when the silicone series is applied and mixed, it is estimated that relatively high results will be obtained based on the tendency of strength reduction.

(G) Water absorption coefficient (W24) ratio

It was carried out according to KS F 2609 (Method of Measuring Water Absorption Coefficient of Building Materials), and the larger the value, the lower the water absorption resistance, and the most effective evaluation of the moisture barrier property for the purpose of the present invention. As a result of the evaluation, excellent resistance characteristics of 0.2 or less were shown.

(H) Water vapor permeability (g)

The evaluation was performed based on the ASTM-E96-95 test method, and the evaluation result indicates that the lower the amount of permeated water, that is, water vapor, the better the waterproofness. In the case of the present invention, as the silicone emulsion content is increased, the permeation amount was found to be increased, which can be judged to have a high possibility of water penetration if there is a continuous action of moisture. On the other hand, in the case of Comparative Example-2, which is a low result, there is a concern that the coating layer is lifted by the lower moisture. Examples 6, -7, and -8, which maintain a constant ratio of silicone emulsion and acrylic emulsion, show an appropriate level of water vapor permeation, and thus have a condition in which waterproof performance and lifting phenomenon due to moisture under the coating material do not occur. Judging.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, according to the present invention, a protective coating material composition having a water-repellent function and waterproofing property, and a method for preparing the same, according to the present invention, is a mixture of cement-based inorganic powder and liquid silicone emulsion, which is a main binder, and the active silicone component is applied to the surface of the structure. SRM / SREM which penetrates into the structure to form a watertight / waterproof layer with a certain depth from the surface, and the coating material formed by the hydrocuring reaction forms a waterproof film at the interface between the base material and the inside, and the surface of the coating material forms a hydrophilic surface film. The silicone resin emulsion coating material, Silicone / Silicone Resin Emlusion Membrane) is used to impart permeation / water repellency / waterproof performance in a single application, and is a very useful invention having improved workability and economic efficiency.

Claims (8)

In the protective film material for forming a film for waterproof water repellent of the structure, A liquid binder mainly composed of a silicone emulsion, and a powder containing cement and aggregate; The content of the silicone emulsion is an active content of 4 to 17% by weight relative to the weight of cement, the mixing ratio of the cement and aggregate is made of 1: 0.5 ~ 1: 5 by weight, In order to stabilize the matrix structure of the cement, any one of the co-binders selected from Styrene-Acrylic Emulsion, Pure-Acrylic Emulsion, SBR-Latex, EVA Emulsion, Acrylic-EVA Copolymerization Emulsion, etc. is within the range of 6 to 16% by weight. Silicone resin emulsion coating material having a water-repellent function and waterproofing, characterized in that added to. The method of claim 1, The silicone emulsion is a silicone resin emulsion coating having water repellent function and water resistance, characterized in that any one of a mixture of Alkyl-based or tri-ethoxy-based silicon resin, alkylalkoxy-based or ethoxy-based Silane, Siloxane, Silane / Siloxane mixture ashes. The method of claim 2, The active ingredient content of the silicone emulsion is 40% by weight to 80% by weight of silicone resin emulsion coating material having a water repellent function and waterproof. The method of claim 2, The silane is a water repellent function characterized in that the choice of any one of Tri-ethoxy (2,4,4-tri-methyl-pentyl) silane, Alkyl-ethoxy silane, Alkyl alkoxy Silane, Tri-ethoxy-octyl-Silane Silicone resin emulsion coating material having waterproofness. The method of claim 2, The siloxane is a silicone resin emulsion coating material having a water-repellent function and water resistance, characterized in that any one of Amino alkyl-functional Poly-di-methyl siloxane, alkyl alkoxy Siloxane, Organomodified siloxanes or a mixture thereof. delete After adding a specified amount of water to a container and stirring at 1600 rpm to add a thickener and dissolving it uniformly for 10 minutes, adding 28% by weight of ammonia water, which swells the thickener, stirred for 10 minutes to thicken and then claim 2 After adding any one of the mullion to the silicone of the term and stirred for 5 minutes to make a uniform liquid at 3500 ~ 4000rpm and then added an acrylic emulsion to prepare each uniform liquid, and mixed the powder mixed with cement and silica A method of producing a silicone resin emulsion coating material having a water-repellent function and a waterproofing property, characterized in that it is produced by. In applying the silicone resin emulsion coating material of claim 1 to a structure to form a protective coating, A hydrophilic layer in which cement and aggregate are mixed on the surface of the coating material; A hydrophobized structure layer in which silicon emulsion particles and cement particles are mixed in the coating material and at the interface; A structure having a water-repellent function and a waterproofing property having a hydrophobic polymer coating layer in which silicon emulsion particles penetrate into the structure.

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