KR102267793B1 - Inorganic material color-chip and construction method of building flooring used the same - Google Patents

Abstract

The present invention relates to an inorganic color chip and a building flooring construction method using the same, wherein the inorganic color chip comprises: 80 to 85% by weight of calcium carbonate; 10 to 15% by weight of any one or more water-soluble binders selected from polyvinyl acetate (PVA) and polyacrylic ester having a solid content of 40 to 60% by weight; 1 to 10% by weight of inorganic pigments; The mixed raw material is molded into a film with a thickness of 50 to 300 μm between a pair of rollers, dried and crushed to form a particle size of less than 1 mm 1 to 5%, a particle size of 1 to 5 mm 90 ~ 95%, it is characterized in that it is blended in a ratio of 1 to 5% with a particle size exceeding 5 mm.
In addition, the building flooring construction method using the inorganic color chip includes a pretreatment step (S1) of removing foreign substances by grinding the surface of the concrete flooring material; an undercoating process (S2) of applying an epoxy primer to a thickness of 0.2 to 0.5 mm on the concrete flooring and drying it to improve adhesion to the surface of the flooring; A primary intermediate treatment step (S3) of applying a solvent-free epoxy coating to a thickness of 1±0.2 mm on the cured undercoat to strengthen the adhesion between the interfaces; Silica sand having a particle size of 20 to 60 mesh is sprayed on the solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach silica sand, and then unattached silica sand is removed to improve the smoothness of the flooring and resistance to cracks. processing step (S4); A second intermediate treatment step (S5) of applying a transparent solvent-free epoxy coating to a thickness of 1±0.2 mm on the first intermediate coating film that is attached to the silica sand and hardened to strengthen the adhesiveness between the interfaces (S5); Inorganic color chip treatment process (S6) of spraying inorganic color chips with a single color or a combination of two or more colors on the transparent solvent-free epoxy coating, drying at room temperature for 12 to 48 hours, attaching the color chips, and scraping off the unattached color chips (S6) ); A topcoating process (S7) of applying a transparent solvent-free epoxy coating to a thickness of 0.5 to 0.8 mm on the second intermediate coat layer to which the inorganic color chip is attached and cured, and drying the inorganic color chip at room temperature for 12 to 48 hours (S7); A hybrid coating process (S8) of applying an organic-inorganic composite coating to a thickness of 0.2 to 0.3 mm on the top coat and drying at room temperature for 12 to 48 hours to enhance durability and flame retardancy of the flooring is included.

Description

INORGANIC MATERIAL COLOR-CHIP AND CONSTRUCTION METHOD OF BUILDING FLOORING USED THE SAME

The present invention relates to an inorganic color chip and a building flooring construction method using the same, and more particularly, to a unique aesthetic feeling and It can exhibit non-slip properties, and an environmentally friendly thermosetting epoxy coating is applied, and the smoothness and crack resistance of the flooring material are improved through the silica sand and hybrid coating process, etc., and the adhesion of foreign substances on the surface of the flooring material is reduced and the durability and flame retardancy are excellent. It relates to a building flooring construction method using inorganic color chips.

Flooring materials using various shapes and materials to achieve ease of use, practicality, interior aesthetics, luxury and sophistication on floors such as houses, offices, warehouses, schools, hospitals, sports facilities, shopping centers, parking lots, hallways and rooftops of buildings construction takes place

Concrete used for the foundation of such a flooring material is formed by a hydration reaction with cement. It has low chemical resistance such as acid resistance and chemical resistance, and its structure is not dense, which is harmful and unpleasant to the environment, as well as being deteriorated by carbon dioxide in the air. There are problems, and in order to supplement and improve these problems, and to obtain wear resistance and visual effects, various construction methods for flooring materials have been developed and applied.

Among them, in the case of attaching natural or artificial granite or marble that exhibits excellent practicality, surface durability, smoothness, lightness, and stain resistance while pursuing beauty with various colors and patterns, colorful textures and colors close to nature. there are many

However, building interior materials using natural or artificial stones have a high cost burden and heavy weight, so it takes a lot of labor and money to transport or handle the material, and it is difficult to repair parts due to damage. Also, due to the nature of the stone surface, foreign substances are not attached to it. In the case of the floor surface covered with stone material, there were problems such as frequent cleaning work.

Accordingly, the floor finishing materials currently used are largely divided into organic and inorganic finishing materials depending on the main component, and the organic type is representative of products using epoxy or urethane resin. These are polymers that are manufactured from petrochemical raw materials and form a room temperature curing type crosslinking. There are many products on the market that not only have excellent texture and color as desired, but also have fewer cracks and, in some cases, provide elasticity and anti-slip functions, dry quickly and are relatively easy to maintain after construction.

Due to these characteristics, the epoxy resin paint, which is widely used as a finishing material among the flooring materials used in many buildings today, has very small reaction shrinkage in addition to strong adhesion and high hardness of the coating film in curing, does not generate volatile substances, dimensional stability, and water resistance. It has been widely used in various fields such as construction and civil engineering because of its excellent physical properties such as , chemical resistance and abrasion resistance, but it has disadvantages such as yellowing, poor adhesion with some polymer materials, and slightly weak flame retardancy.

In addition to the various paints used as floor finishing materials as described above, in recent years, continuous research and development to implement natural stone patterns on the flooring materials or interior and exterior walls of buildings has been actively conducted, and for this purpose, various color chips are used to achieve visual effects. Technologies that can provide

Looking at the prior art for improving the characteristics and aesthetics of such a building finishing material, Korean Patent Application Laid-Open No. 10-2009-0020022 (Kim Young-Il) includes the steps of constructing a mortar layer on the surface; applying a liquid PVA binder to the mortar layer; dispersing and attaching color chips of a certain size on the PVA binder; scraping and arranging the color chips not attached to the PVA binder with a scraper; attaching a stencil tape on the color chip to produce various patterns; and applying a coating agent on the color chip and the stencil tape; provides a concrete coating method comprising a marble construction effect, wherein the color chip has an average diameter of 5 mm, and PVA with a specific gravity of 2.4 to 2.8 made of chips.

In addition, the same Patent Registration No. 10-1613536 (Park Chang-rae) discloses a raw material mixing step of blending raw materials for manufacturing a color chip; A raw material input step of injecting the blended raw material between a pair of rolls rotating in opposite directions; a drying step of drying the color chip raw material in the form of a sheet that has passed through the pair of rolls; and a grinding step of manufacturing the color chips by grinding the dried sheet-shaped raw material for color chips so that the thickness of the color chips is adjusted by adjusting the gap formed between the pair of rolls, In the raw material input step, the blended raw material is transferred between a pair of Teflon-coated rolls through a metering pump, and discharged in the form of a sheet by inputting between the pair of rolls, and the gap between the pair of rolls is 80 to 120 micrometers. A method of manufacturing a color chip, characterized in that it consists of a meter, wherein the color chip is an acryl-silicon emulsion 40 to 50% by weight, titanium dioxide 1 to 8% by weight, calcium carbonate 45 to 55% by weight, aluminum hydroxide 1 to 3% by weight %, is composed of 1 to 5% by weight of the preparation, has a size of 1 to 12 mm in diameter, and has a thickness of 80 to 120 micrometers.

In addition, in the method for manufacturing a color chip added to a granite pattern paint composition or a stone paint composition, the same registration patent No. 10-1777542 (Dong-Geun Jeong) discloses a raw material mixing step (10) of blending the raw materials for manufacturing the color chip. ; A raw material input step of injecting the blended raw material between a pair of rolls 20 and 21 rotating in the same direction; A transfer belt moving uniaxially by adjusting the roll 22 for adjusting the position of the transfer belt up and down under the roll 20 coated with the raw material to a constant thickness by the interval between the pair of rolls 20 and 21 A raw material coating step in which the raw material is coated on the sheet-shaped transfer belt surface 31 by contacting the (31); The first step of drying the color chip raw material of a certain thickness on the sheet-shaped transfer belt surface 31; a step in which the primary dried color chips are detached from the sheet-shaped conveying belt surface 31 by the blade 50 seated on the rear roll 32 portion of the dryer; The detached color chip sheet 51 is secondarily dried while being transferred from the sheet-shaped conveying belt surface 62; a pulverizing step in which the secondary dried color chips are pulverized with a pulverizer 80; and packaging (90) the product that has undergone the pulverization step. An improved color chip manufacturing method comprising: 38 to 48 wt% of an acryl-silicone emulsion, carbonic acid 40 to 50% by weight of calcium, 1 to 3% by weight of aluminum hydroxide, 0.1 to 2% by weight of zinc stearate, and 1 to 3% by weight of the auxiliary agent.

And in Patent Registration No. 10-1780603 (Dong-Geun Jeong), 5 to 15% by weight of an acrylic color chip having a size of 5 to 12mm and a thickness of 80 to 120 micrometers, 45 to 60% by weight of an acryl-silicone emulsion, aluminum hydroxide 1 To 3% by weight, 5 to 15% by weight of granite, 1 to 5% by weight of additives, and 13 to 33% by weight of water There is disclosed a granite pattern coating composition comprising an acrylic color chip.

However, as described above, conventionally, since the main component uses an organic color chip made of PVA or acrylic resin, the color of the surface of the flooring material is not clear and the non-slip property is insufficient due to the flat texture. It was found that, when mixed, the adhesiveness of the color chip and the coating agent was lowered, and thus there was a problem in the durability and flame retardancy of the flooring material.

On the other hand, in the present invention, by applying an inorganic color chip prepared by mixing a water-soluble binder and a pigment to a large amount of calcium carbonate, the three-dimensional aesthetics and non-slip properties of the surface of the flooring are imparted, and at the same time, an environmentally friendly thermosetting epoxy coating is applied and treated with silica sand. The process improves the smoothness of the flooring and the resistance to cracks, and the hybrid coating process reduces the adhesion of foreign substances due to the smooth touch of the flooring surface, making it easy to clean and has excellent durability and flame retardancy. The invention was completed.

Republic of Korea Patent Publication No. 10-2009-0020022 (published on February 26, 2009) Republic of Korea Patent Publication No. 10-1613536 (published on April 29, 2016) Republic of Korea Patent Publication No. 10-1777542 (published on September 19, 2017) Republic of Korea Patent Publication No. 10-1780603 (published on October 17, 2017)

It is an object of the present invention to mix a large amount of calcium carbonate with a water-soluble binder and a pigment, and mix the film-like chips manufactured by classifying them into various colors with suitable colors and particle size distributions to provide excellent light reflection, vivid colors and unique aesthetics. It is intended to provide an inorganic color chip that can realize energy saving inside the building by reducing heat conduction when it is installed on the flooring material of a building.

Another object of the present invention is to provide three-dimensional aesthetics and non-slip properties to the surface of the flooring material by applying the inorganic color chip directly under the top coat layer, and at the same time apply a thermosetting epoxy coating agent, and smoothness and crack resistance of the flooring material through a silica sand treatment process In addition, due to the hybrid coating treatment process by the organic-inorganic composite coating agent on the top coat, the adhesion of foreign substances due to the smooth touch of the flooring surface is reduced, so it is easy to clean and provides an eco-friendly building flooring construction method with excellent durability and flame retardancy will do

The inorganic color chip according to the present invention contains 80 to 85% by weight of calcium carbonate; 10 to 15% by weight of any one or more water-soluble binders selected from polyvinyl acetate (PVA) and polyacrylic ester having a solid content of 40 to 60% by weight; 1 to 10% by weight of inorganic pigments; The mixed raw material is molded into a film with a thickness of 50 to 300 μm between a pair of rollers, dried and crushed to form a particle size of less than 1 mm 1 to 5%, a particle size of 1 to 5 mm 90 ~ 95%, it is characterized in that it is blended in a ratio of 1 to 5% with a particle size exceeding 5 mm.

In addition, the method for constructing a building flooring material using an inorganic color chip according to the present invention comprises: a pretreatment step (S1) of removing foreign substances by grinding the surface of the concrete flooring material; an undercoating process (S2) of applying an epoxy primer to a thickness of 0.2 to 0.5 mm on the concrete flooring and drying it to improve adhesion with the surface of the flooring; A primary intermediate treatment step (S3) of applying a solvent-free epoxy coating to a thickness of 1±0.2 mm on the cured undercoat to strengthen adhesion between the interfaces; Silica sand having a particle size of 20 to 60 mesh is sprayed on the solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach silica sand, and then unattached silica sand is removed to improve the smoothness of the flooring and resistance to cracks. processing step (S4); A secondary intermediate treatment step (S5) of applying a transparent solvent-free epoxy coating to a thickness of 1±0.2 mm on the first intermediate coating film that is attached to the silica sand and hardened to strengthen the adhesiveness between the interfaces (S5); Inorganic color chip treatment process (S6) of spraying inorganic color chips with a single color or a combination of two or more colors on the transparent solvent-free epoxy coating, drying at room temperature for 12 to 48 hours, attaching the color chips, and scraping off the unattached color chips (S6) ); A topcoating process (S7) of applying a transparent solvent-free epoxy coating to a thickness of 0.5 to 0.8 mm on the second intermediate coat film to which the inorganic color chip is attached and cured, and drying the inorganic color chip at room temperature for 12 to 48 hours (S7); A hybrid coating process (S8) of applying an organic-inorganic composite coating to a thickness of 0.2 to 0.3 mm on the top coat and drying at room temperature for 12 to 48 hours to enhance durability and flame retardancy of the flooring is included.

According to a preferred embodiment of the present invention, the organic-inorganic composite coating agent used in the hybrid coating treatment process (S8) is based on a silicon oxide-modified epoxy resin having a weight average molecular weight of 250 to 3000, and includes an amine-based curing agent. As a liquid silicon oxide-modified epoxy resin composition, the main agent and the curing agent are characterized in that the epoxy equivalent of the main agent and the active hydrogen equivalent of the curing agent are mixed in a ratio of 1:1.

The inorganic color chip according to the present invention mixes a large amount of calcium carbonate with a water-soluble binder and a pigment, and mixes the film-like chips manufactured by classifying them into various colors with an appropriate color and particle size distribution. Not only does it show a unique aesthetic feeling, but when it is installed on the building flooring, heat conduction is reduced, which has the effect of realizing energy savings inside the building.

The eco-friendly building flooring construction method according to the present invention imparts three-dimensional aesthetics and non-slip properties to the surface of the flooring by applying an inorganic color chip directly under the top coat, and at the same time applies a thermosetting epoxy coating and a silica sand treatment process to improve the smoothness and cracks of the flooring. It is possible to improve the resistance to corrosion, and also, due to the hybrid coating treatment process by the organic-inorganic composite coating agent on the top coat, the adhesion of foreign substances due to the smooth touch of the flooring surface is reduced, so that it is easy to clean, and there is an effect of excellent durability and flame retardancy.

1 is a process flow chart showing a building flooring construction method according to the present invention.

The inorganic color chip according to the present invention contains 80 to 85% by weight of calcium carbonate; 10 to 15% by weight of any one or more water-soluble binders selected from polyvinyl acetate (PVA) and polyacrylic ester having a solid content of 40 to 60% by weight; The inorganic pigment is contained in a ratio of 1 to 10% by weight, and the mixed raw material is molded into a film having a thickness of 50 to 300 μm between a pair of rollers, dried and crushed to 1 to 5% of particle size less than 1 mm, It is preferable to blend in a ratio of 90 to 95% of particle size of 1 to 5 mm, and 1 to 5% of particle size exceeding 5 mm.

In general, calcium carbonate is a main component of limestone, marble, calcite, berne, chalk, ice tin, seashell, eggshell, coral, etc., as a white substance produced by the meeting of carbonate ions and calcium ions, and is not soluble in water and precipitates in an aqueous solution and most carbon dioxide (CO ₂ ) present on the earth exists in the form of calcium carbonate.

Calcium carbonate constituting the inorganic color chip in the present invention uses a powder obtained by finely pulverizing colorless or white crystals, and generally has physicochemical properties of pH 7 to 8, specific gravity 2.93, Mohs hardness 3.0, and refractive index 1.63 to 1.66. It is almost calcite type, shows very stable physical properties at room temperature and pressure, and has a relatively stable crystallographic structure. Therefore, when the color chip is manufactured by using it in the range of 80 to 85% by weight based on the total weight of the color chip, the light It was confirmed that the reflectance was excellent and there was no problem in adhesiveness and moldability with the binder.

The binder used for this is not particularly limited as long as there is no problem with the environment and adhesion, but in the present invention, polyvinyl acetate (PVA) or polyacrylic acid ester (PVA) or polyacrylic acid ester (VOCs) or harmful heavy metals that do not emit any volatile organic compounds (VOCs) or harmful heavy metals ( Polyacrylic Ester), it is suitable to use one or more water-soluble binders selected from among 10 to 15% by weight in the range of 10 to 15% by weight of the inorganic pigment to maintain the color expression and light reflectivity of the color chip, and the water-soluble binder has a solid content of 40 to 60% by weight. % is most advantageous for molding into a film having a thickness of 50 to 300 μm at the time of manufacture.

For reference, the polyvinyl acetate is prepared by treating vinyl acetate as a monomer with a peroxide catalyst, and polyacrylic acid ester is prepared by easily addition polymerization when heated by adding an initiator to acrylic acid as a monomer.

Inorganic pigments used in the present invention are white pigments such as titanium oxide, lithophone, etc., red pigments such as iron oxide, cadmium red, silver wine, crimson antimony, etc., yellow pigments such as cadmium sulfur, chromium sulfur, zinc chromium sulfur, titanium sulfur, etc., green It is suitable for dispersibility to include chromium oxide as a pigment and blue pigment such as dull blue, royal blue, and brown pigments alone or in a mixture of 10% by weight or less. If the inorganic pigment is not used, translucent white or grayish white Of course, color chips can be obtained, and by manufacturing them separately by color, they can be used colorfully by combining one or two or more colors according to the needs of the consumer.

The raw materials mixed as described above are molded into a film with a thickness of 50 to 300 μm between a pair of rollers, dried, crushed, and mixed according to the particle size. In addition, heat conduction due to inorganic materials can be reduced to realize energy savings inside the building. Preferably, the particle size is 1 to 5% less than 1 mm, 90 to 95% of the particle size is 1 to 5 mm, and 1 to more than 5 mm. It was investigated that mixing in a ratio of 5% exhibits excellent adhesion and the effect of natural natural stone materials.

As shown in FIG. 1 , the method for constructing a building flooring material using an inorganic color chip in the present invention includes a pretreatment step (S1) of removing foreign substances by grinding the surface of the concrete flooring material; an undercoating process (S2) of applying an epoxy primer to a thickness of 0.2 to 0.5 mm on the concrete flooring and drying it to improve adhesion with the surface of the flooring; A primary intermediate treatment step (S3) of applying a solvent-free epoxy coating to a thickness of 1±0.2 mm on the cured undercoat to strengthen adhesion between the interfaces; Silica sand having a particle size of 20 to 60 mesh is sprayed on the solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach silica sand, and then unattached silica sand is removed to improve the smoothness and crack resistance of the flooring material. processing step (S4); A secondary intermediate treatment step (S5) of applying a transparent solvent-free epoxy coating to a thickness of 1±0.2 mm on the first intermediate coating film that is attached to the silica sand and hardened to strengthen the adhesiveness between the interfaces (S5); Inorganic color chip treatment process (S6) of spraying inorganic color chips with a single color or a combination of two or more colors on the transparent solvent-free epoxy coating, drying at room temperature for 12 to 48 hours, attaching the color chips, and scraping off the unattached color chips (S6) ); A topcoating process (S7) of applying a transparent solvent-free epoxy coating to a thickness of 0.5 to 0.8 mm on the second intermediate coat film to which the inorganic color chip is attached and cured, and drying the inorganic color chip at room temperature for 12 to 48 hours (S7); A hybrid coating process (S8) of applying an organic-inorganic composite coating to a thickness of 0.2 to 0.3 mm on the top coat and drying at room temperature for 12 to 48 hours to enhance durability and flame retardancy of the flooring is included.

For the construction of the flooring material, proper physical properties can be exhibited when the air temperature is 5 ~ 35℃, the relative humidity is 80% or less, the surface temperature is 40℃ or less, the surface moisture content is 6% or less, and the substrate surface pH is 9 or less. Accordingly, the curing time of the coating agent can be adjusted within 12 to 48 hours.

The epoxy primer and epoxy coating agent used in the present invention is a general-purpose epoxy resin, and is a two-component paint used by mixing a main agent and a curing agent. Typically, epoxy equivalent (g/eq) 184 to 194, viscosity (cps, 25° C.) 12000 to 15000, softening point 60 ~ 70℃, specific gravity (20℃) 1.17 epoxy resin or epoxy equivalent (g/eq) 450 ~ 500, viscosity (cps, 25℃) 12000 ~ 15000, softening point 60 ~ 70℃, specific gravity (20℃) ) 1.16 to 1.20 epoxy resins of any one species or a mixture thereof is used. Such an epoxy resin is a generic term for compounds having an epoxy bond, and is typically made by polymerizing epichlorohydrin and bisphenol A, and has a very small degree of shrinkage during curing and does not generate volatile substances.

The epoxy resin is a typical curing-reactive resin such as urea, melamine resin, and phenolic resin. In particular, the epoxy resin coating film is significantly superior to other coatings in terms of adhesion, hardness, reversibility, elasticity, and chemical resistance, which is an epoxy resin. The unique chemical structure and three-dimensional structure of

And the volume solid content of the epoxy primer used in the undercoat of the present invention is 25 to 35%, the volume solid content of the (transparent) solvent-free epoxy coating used for the middle coat and the top coat is 60 to 100%, the organic-inorganic composite coating used for the hybrid coating As the volume solid content is within the range of 45 to 60%, the coating agent used in each process of the present invention uses a product whose volume solid content is different from each other, so that the viscosity and coating thickness of the epoxy suitable for the application site are adjusted. and excellent durability.

First, the pre-treatment process (S1) is a step of removing foreign substances by grinding the surface of the concrete flooring material. In the case of high-strength concrete, adhesion failure may occur during grinding treatment, so surface treatment is performed by a blasting method to improve adhesion performance. Also, after V-cutting, filling in gaps, grooves, and cracks with epoxy putty and polishing can improve adhesion with the undercoat. After that, the undercoating process (S2) is performed by applying an epoxy primer to a thickness of 0.2 to 0.5 mm on the concrete flooring material and drying it to fill the pores on the surface of the concrete flooring material and improve adhesion with the intermediate coat film.

The first intermediate treatment process (S3) is a step to strengthen the adhesion between the interfaces by applying a solvent-free epoxy coating to a thickness of 1±0.2 mm on the cured undercoating film. Be sure to treat the silica sand before the solvent-free epoxy coating is cured ( S4) should be carried out.

In the silica sand treatment process (S4), silica sand having a particle size of 20 to 60 mesh is sprayed on the solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach silica sand, and then the unattached silica sand is removed to improve the smoothness of the flooring. As a step of improving the resistance to cracks, the silica sand is impregnated in a liquid solvent-free epoxy coating agent applied to a thickness of about 1 mm and a silicic acid component (SiO _{2 )} ) By using fine quartz sand containing 95% or more, the horizontal smoothness of the flooring is improved and the bonding with the coating agent is maximized to prevent microcracks occurring on the surface of the flooring, and the unattached silica sand after curing with a solvent-free epoxy coating is a broom. Sweep with or use a vacuum suction device to recover

The secondary intermediate treatment process (S5) is a step to strengthen the adhesiveness between the interfaces by applying a transparent solvent-free epoxy coating to a thickness of 1±0.2 mm on the first intermediate coating film that is hardened with the silica sand attached. Before curing, the inorganic color chip treatment process (S6) must be performed, and due to the transparent solvent-free epoxy coating, the inorganic color chip is firmly attached and the light reflectivity of the inorganic color chip can be maximized.

In this inorganic color chip treatment process (S6), a single color or a combination of two or more colors is sprayed on the transparent solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach the color chip, and then the color chip is not attached. It is a step of scraping off the surface, whereby the color chip is impregnated into a transparent solvent-free epoxy coating and attached, and fine and uniform irregularities are formed on the upper part, thereby exhibiting unique aesthetics and non-slip properties, and excellent light reflection As a result, the heat conduction of the flooring material due to the color chip made of inorganic material is reduced along with the vivid color, which has the effect of realizing energy saving inside the building.

Color chips of various colors are attached directly on the transparent solvent-free epoxy coating agent through the inorganic color chip treatment process (S6) as described above, and the unattached color chips are recovered by scraping them with an iron knife or a brush, etc., Inorganic color chips form uniform and fine irregularities on the surface of the flooring material, so compared to the case of installing color chips made of conventional polymer resin, the light reflection on the surface of the flooring material is good, which not only shows a three-dimensional aesthetic feeling, but also has excellent non-slip characteristics and flame retardancy. will be excellent

The topcoating process (S7) is a step of applying a transparent solvent-free epoxy coating to a thickness of 0.5 to 0.8 mm on the second intermediate coat layer to which the inorganic color chip is attached and cured, and drying the inorganic color chip at room temperature for 12 to 48 hours to fix the inorganic color chip. By passing through the process, the inorganic color chips are firmly attached to the inside of the flooring material, thereby densely filling the voids between the inorganic color chips and gently maintaining the unevenness formed uniformly on the surface of the flooring material, while improving the durability of the flooring material. It goes without saying that the color and aesthetics of the color chip can be effectively exhibited by forming a top coat of a transparent color.

Finally, the hybrid coating treatment process (S8) is a step of strengthening the durability and flame retardancy of the flooring material by applying an organic-inorganic composite coating to a thickness of 0.2 to 0.3 mm on the top coat and drying it at room temperature for 12 to 48 hours. The base composite coating prevents yellowing, which is a disadvantage of epoxy coatings, and poor adhesion with crystalline resins or non-polar resins such as PE, PP, silicone, acrylic, etc., and the hardness, abrasion resistance, and scratch resistance of the coating film. It is carried out to improve characteristics such as , dust resistance, etc., and it is preferable to use a coating agent of the same transparent color as the top coat.

In the present invention, an organic-inorganic composite coating agent to be applied to the hybrid coating treatment process (S8) was developed through numerous trials and errors, which is the most vulnerable problem of epoxy resins in addition to excellent acid resistance, alkali resistance, and chemical resistance such as solvent resistance. In order to improve resistance to UV rays, that is, weather resistance, it is most preferable to select a two-component silicon oxide-modified epoxy resin composition comprising a silicon oxide-modified epoxy resin having a weight average molecular weight of 250 to 3000 and including an amine-based curing agent. A conclusion was drawn. At this time, when the molecular weight of the subject is lower than 250 to 3000, two or less epoxide functional groups are formed, resulting in deterioration of chemical resistance and mechanical properties, and when higher than that, the chemical structure of silanol is branched. There is a risk of gelation.

The silicon oxide-modified epoxy resin is an epoxide functional group added by reacting polysilanol with epichlorohydrin, and when the epoxy resin is used together with an amine-based curing agent to form a coating film, the epoxy equivalent of the main agent and the curing agent By mixing the active hydrogen equivalent in a ratio of 1:1, it is possible to form a coating film with excellent weather resistance and flame retardancy along with the advantages of conventional epoxy resin paints.

Hereinafter, the quality test results for samples commissioned by the Korea Research Institute of Chemical Convergence for the organic-inorganic composite coating agent used in the hybrid coating process according to the present invention are shown in [Table 1] below.

Test Items unit result Test Methods Specific gravity (subject) - 1.04 KS M ISO 2811-1:2016 Non-volatile content [(105±2)℃, 3h] % 58.4 KS M ISO 3251:2011 state of dry film - clear KS M ISO 5000:2014 solidification drying time h 12 KS M ISO 5000:2014 Gloss (60°) GU 84 KS M ISO 2813:2014

- Mixing ratio = Subject: Hardener = 3.5 : 1 (mass ratio)

In addition, the flame-retardant performance of the organic-inorganic composite coating agent used in the hybrid coating treatment process according to the present invention requested by the Korea Construction Industry Quality Research Institute shows the non-combustibility and gas toxicity test results for the specimens in [Table 2] below. 3] and [Table 4], respectively.

Test Items nonflammable gas toxicity Specimen classification One 2 3 4 5 test specimen
(mm) horizontal/vertical Φ44 Φ44 Φ44 220/220 220/220 thickness 50.5 51.2 51.8 6.0 6.0 mass (g) 160.17 165.95 165.36 404.1 405.7 curing time Thermostat(60±5)℃,24h,
Desigator 24h (23±2)℃, (50±5)%
Maintain constant weight (0.1g) Coating thickness (application amount) 50㎛ (0.09kg/m2, 10m2/L) base material mortar CRC board

- Lab environment: temperature (23±2)℃, relative humidity (50±10)%

division unit One 2 3 Exam conditions
(stable heating furnace) Drift of furnace temperature ℃ 1.8 0.8 2.0 Deviation of furnace temperature ℃ 7.0 4.9 5.6 furnace temperature initial temperature ℃ 748.0 745.9 750.6 maximum temperature ℃ 732.0 732.0 731.0 maximum equilibrium temperature ℃ 730.7 730.7 730.7 temperature difference ℃ 1.3 1.3 0.3 mass mass after test g 142.43 147.23 146.83 reduction in heating g 17.74 18.72 18.53 mass loss rate % 11.1 11.3 11.2 afterflame time s 0 0 0

- Non-flammability test performance criteria:

1) After the start of the heating test, the highest temperature in the furnace should not rise above the final equilibrium temperature by 20K for 20 minutes (however, if equilibrium is not reached for 20 minutes, the average temperature for the last 1 minute shall be the final equilibrium temperature).

2) After heating, the mass reduction rate of the specimen should be 30% or less.

division unit 4 5 Average value of quiescent time in rats min:s 13:47 14:27 Standard Deviation min:s 01:17 00:40 Average quiescent time in rats min:s 12:30 13:47

- Performance criteria for gas toxicity test: The average behavioral stop time of laboratory mice should be more than 9 minutes

As shown in the test results shown in [Table 3] and [Table 4], the organic-inorganic composite coating agent used in the present invention meets the performance standards of the non-flammability test for specimens 1 to 3 and the gas toxicity test for specimens 4 and 5. It was confirmed that the flame retardant performance is excellent because it conforms to the fact that it can improve chemical resistance such as excellent acid resistance, alkali resistance, solvent resistance, and resistance to ultraviolet rays, which is the weakest problem of epoxy resin, so it is self-evident that it is suitable for hybrid coating. The final development goal was achieved.

Therefore, the inorganic color chip and the building flooring construction method using the inorganic color chip according to the present invention can exhibit unique aesthetics and non-slip properties in flooring materials of buildings such as offices by using the inorganic color chip manufactured with calcium carbonate as the main component. In addition, the smoothness and crack resistance of the flooring material is improved through the use of an environmentally friendly thermosetting epoxy coating agent and the silica sand and hybrid coating process, and the adhesion of foreign substances on the surface of the flooring material is reduced and the durability and flame retardancy are excellent. It can be applied to the surface of various structures as well as the flooring material in a variety of uses and forms without departing from the technical spirit of the present invention.

Claims (5)

Calcium carbonate 80 to 85% by weight;
10 to 15% by weight of any one or more water-soluble binders selected from polyvinyl acetate (PVA) and polyacrylic ester having a solid content of 40 to 60% by weight;
1 to 10% by weight of inorganic pigments; included in the proportion of
The mixed raw material is molded into a film with a thickness of 50 to 300 μm between a pair of rollers, dried and then crushed to form a particle size of 1 to 5% less than 1 mm, a particle size of 1 to 5 mm 90 to 95%, and a particle size An inorganic color chip, characterized in that it is formulated in a ratio of 1 to 5% over 5 mm. delete A pretreatment process (S1) of removing foreign substances by grinding the surface of the concrete flooring material;
an undercoating process (S2) of applying an epoxy primer to a thickness of 0.2 to 0.5 mm on the concrete flooring and drying it to improve adhesion to the surface of the flooring;
A primary intermediate treatment step (S3) of applying a solvent-free epoxy coating to a thickness of 1±0.2 mm on the cured undercoat to strengthen the adhesion between the interfaces;
Silica sand having a particle size of 20 to 60 mesh is sprayed on the solvent-free epoxy coating agent, dried at room temperature for 12 to 48 hours to attach silica sand, and then unattached silica sand is removed to improve the smoothness of the flooring and resistance to cracks. processing step (S4);
A second intermediate treatment step (S5) of applying a transparent solvent-free epoxy coating to a thickness of 1±0.2 mm on the first intermediate coating film that is attached to the silica sand and hardened to strengthen the adhesiveness between the interfaces (S5);
Inorganic color chip treatment by spraying the inorganic color chip of claim 1 in a single color or a combination of two or more colors on the transparent solvent-free epoxy coating, drying at room temperature for 12 to 48 hours, attaching the color chip, and scraping off the unattached color chip step (S6);
A topcoating process (S7) of applying a transparent solvent-free epoxy coating to a thickness of 0.5 to 0.8 mm on the second intermediate coat layer to which the inorganic color chip is attached and cured, and drying the inorganic color chip at room temperature for 12 to 48 hours (S7);
A hybrid coating process (S8) of applying an organic-inorganic composite coating to a thickness of 0.2 to 0.3 mm on the top coat and drying it at room temperature for 12 to 48 hours to strengthen the durability and flame retardancy of the flooring;
A building flooring construction method using an inorganic color chip, characterized in that it comprises a. delete delete

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