KR20230036491A - Environment friendly surface finishing materials for asbestos construction materials - Google Patents

Abstract

The present invention provides a surface finishing material composition and a solid stabilization treatment method of an asbestos component. The surface finishing material composition can be optimally used for asbestos scattering prevention construction by blocking the scattering of asbestos from an asbestos-containing building material, has excellent effects of the adsorption and decomposition of harmful substances such as volatile organic substances and formaldehyde, the emission of far-infrared rays and anions, and excellent antibacterial, antifungal and deodorizing effects, has effects of reducing thermal conductivity, securing air permeability, controlling humidity and preventing condensation, has excellent flame retardancy, water resistance and adhesiveness, to minimize the risk of environmental contamination, and has a beneficial effect on the health of a human body.

Description

Environment friendly surface finishing materials for asbestos construction materials}

The present invention prevents scattering of asbestos from building materials containing asbestos, so it can be optimally used for construction to prevent scattering of asbestos. , has excellent anti-fungal and deodorizing effects, reduces thermal conductivity, secures air permeability, controls humidity and prevents condensation, and has excellent flame retardancy, water resistance and adhesiveness, which minimizes the risk of environmental pollution and has beneficial effects on human health It relates to a surface finishing material having and a solid stabilization treatment method for asbestos components.

Asbestos has a diameter of about 0.02 ~ 0.03 ㎛, has very strong flexibility and resistance to heat, and is weakly acidic, so it is used in various fields from construction to automobile manufacturing and household goods, and is used in about 3,000 types of industrial products. Before the Industrial Revolution, the demand for high-temperature fibers was not high, but since the 20th century, asbestos has been widely used as an interior and exterior material for construction and as an industrial raw material because of its physical properties such as excellent insulation, heat resistance and insulation, and its low cost.

Recently, as it is known that inhalation of asbestos into the lungs causes malignant diseases such as lung cancer, and awareness of the harmfulness of asbestos increases, asbestos production tends to decrease, and asbestos substitutes are being developed and used.

In the early days, asbestos was considered a material that did not have a significant adverse effect on health because it was a mineral silicate. As the number of deaths due to asbestos exceeds tens of thousands every year worldwide, countries around the world, including Korea, are investing astronomical budgets to dismantle and remove asbestos.

Asbestos is divided into white asbestos, brown asbestos, blue asbestos, etc. depending on the composition, and more than 95% of asbestos is used in Korea. In Korea, 82% is used for building materials, followed by automobile brake linings for 11% and fire-retardant textiles for 5%. Asbestos is a harmful substance that adversely affects health even in small amounts, causing asbestosis, lung cancer, and malignant mesothelioma, a cancer of the pleura or peritoneum.

Building materials containing asbestos are used as roofing and wall materials, or sprayed on walls and ceilings for decoration, sound control, and fire prevention as finishing materials, and used as fire-resistant coatings for plastering or steel frame members. Insulation and insulation materials are used for water supply pipes, steam pipes, ducts, boilers, and hot water tanks, and as other water-retaining materials, vinyl asbestos floor tiles, ceiling tiles, transit or cement boards, wall boards, and bone slate for roofs are used.

According to the Asbestos Comprehensive Survey published by the Ministry of Environment in 2009, the actual use and scattering of asbestos-containing materials in 224 public buildings were investigated to investigate the use and scattering potential of asbestos-containing materials in public buildings and to suggest safe management measures for asbestos-containing buildings. As a result of investigating the possibility, asbestos was detected in 170 of the 224 public buildings surveyed, showing a detection rate of about 75%. Asbestos was detected in 70.8% of art facilities, 79.3% of community centers, and 72.7% of sports facilities, 84.6% of buildings before the 1970s, 92.1% of buildings in the 1970s, 86.4% of buildings in the 1980s, and 85.4% of buildings in the 1990s. Asbestos was detected in 44.1% of buildings in the 2000s.

In addition, as a result of research on the actual condition of asbestos use in school buildings and the development of a standard model for asbestos management in 2007, it was found that 88% of the solid samples of materials suspected to contain asbestos in kindergarten, elementary, middle and high schools (100 schools) nationwide contained asbestos. investigated

In Korea, it was later than developed countries, but since 2008, the manufacture, use, and import of products with asbestos content in excess of 0.1% have been completely banned, and from 2009, it has been expanded to all asbestos products. In addition, workers at asbestos-related workplaces or nearby residents can receive compensation and support when they suffer from asbestos disease. It was decided to investigate the actual condition of asbestos exposure of residents and establish a legal basis to provide compensation and support to them.

On the other hand, domestic laws related to asbestos dismantling and removal are described in the Occupational Safety and Health Act, Enforcement Rules, and Rules on Industrial Health Standards. Wet work must be done using a humectant, and if the workplace is indoors, windows, walls, floors, etc. are sealed with impervious barriers such as vinyl, the place is maintained at negative pressure, and sanitary facilities such as changing rooms, shower rooms, and work clothes changing rooms are installed. It must be installed and maintained in connection with the workplace, and if the workplace is outdoors, it is regulated to take measures such as operating an asbestos dust collection device equipped with a high-performance filter (HEPA Filter) to prevent asbestos dust from scattering during work. .

However, the above methods of dismantling (removing) asbestos-containing facilities or buildings (eg, school classrooms or ceiling textures of public buildings) have problems such as high cost and time constraints due to long-term construction. In addition, there are also problems in that waste is generated, which causes secondary environmental problems due to waste treatment, and additional costs are incurred due to the installation of new facilities.

In order to solve the problems of the asbestos dismantling and removal method, a method of using an asbestos solid stabilizing solvent to prevent asbestos from scattering from building materials containing asbestos has been proposed.

In this method, asbestos solid stabilization solvent is prepared by mixing calcium carbonate, resin coating, water and natural oil, the asbestos solid stabilization solvent is applied twice using an airless sprayer, and the flame retardant is applied twice. After that, we use a three-step treatment method in which natural antibacterial/deodorant rolls are applied again.

However, the above method also has a problem in that the work process is complicated, which takes a long time and consumes a lot of manpower, and since a separate coating agent is additionally applied to the outside for antibacterial and deodorizing functions, the functionality is not maintained for a long time.

Therefore, the present invention is to solve the above problems, and it is possible to minimize environmental problems by preventing asbestos from being scattered from building materials at low cost by not dismantling building materials containing asbestos through a simple coating operation. Absorbs and decomposes harmful substances such as volatile organic substances and formaldehyde, emits far-infrared rays and anions, has excellent antibacterial, antifungal, and deodorizing effects, reduces thermal conductivity, secures air permeability, controls humidity and prevents condensation, and has flame retardancy, water resistance, and adhesion. It is to provide a surface finishing material composition that is beneficial to human health and can change a comfortable and safe indoor space and a solid stabilization treatment method for asbestos components.

One aspect of the present invention provides a solid stabilization treatment finishing material composition of an asbestos component that blocks scattering of asbestos from building materials containing asbestos and provides functionality beneficial to the environment and human health.

The finishing material composition includes 46 to 75 parts by weight of an inorganic binder, 10 to 39 parts by weight of a filler, 5 to 20 parts by weight of a functional ceramic powder, and 1 to 15 parts by weight of a pigment powder.

Another aspect of the present invention provides a method for producing the surface finishing material composition for building materials by ball milling all the prepared raw materials to uniformly pulverize them into fine nanoparticles having a size of 50 to 100 nm and then mixing them.

The ball used in the crushing process is preferably a ceramic material having a diameter of 3 to 150 mm, and treated for 4 to 12 hours at a rotational speed of 100 to 300 rpm.

Another aspect of the present invention is a method for treating the finishing material composition that blocks scattering of asbestos from building materials containing asbestos and provides functionalities beneficial to the environment and human health by using a brush, roller, or air spray sprayer. Provided is an asbestos solid component stabilization treatment method characterized in that the application is repeated twice.

It is preferable that the thickness of the coating film of the finishing material finally formed by the above treatment method is 80 to 100 μm, and the amount of the finishing material used twice is preferably about 0.2 to 0.4 kg/m ² .

During the solid stabilization treatment of the asbestos component, the working environment temperature is preferably in the range of 5 to 30° C. and the working environment humidity is in the range of 65 to 85%.

As described above, according to the eco-friendly surface finishing material for asbestos building materials and its treatment method according to the present invention, asbestos-containing building materials are not dismantled and separate waste is not generated, and asbestos is prevented from scattering from the building materials. , volatile organic substances, adsorption and decomposition of harmful substances to the human body such as formaldehyde, emission of far-infrared rays and anions, excellent antibacterial, antifungal, and deodorizing effects, reduction in thermal conductivity, securing air permeability, humidity control and prevention of condensation, flame retardancy, water resistance, It has excellent adhesion and can create an environment beneficial to human health at low cost. In particular, it can be effectively applied to public facilities such as schools, office buildings of local governments, and childcare facilities. As a result, asbestos risk, a national environmental problem, can be effectively resolved.

1 is a flowchart illustrating a method of manufacturing and treating an eco-friendly surface finishing material composition for asbestos building materials according to the present invention.
Figure 2 is a bottom view of the bottom portion of the energy-saving ceramic-coated heating cookware of the present invention.

Hereinafter, the present invention will be described in more detail.

One embodiment of the present invention provides a solid stabilization treatment finish composition of an asbestos component that blocks scattering of asbestos from building materials containing asbestos and provides functionality beneficial to the environment and human health.

The asbestos building material surface finishing composition includes 46 to 75 parts by weight of an inorganic binder, 10 to 39 parts by weight of a filler, 5 to 20 parts by weight of a functional ceramic powder, and 1 to 15 parts by weight of a pigment powder.

The asbestos building material surface finishing composition includes 46 to 75 parts by weight of an inorganic binder, 10 to 39 parts by weight of a filler, 5 to 20 parts by weight of a functional ceramic powder, and 1 to 15 parts by weight of a pigment powder.

The inorganic binder is for improving mechanical and chemical properties and thermal conductivity such as durability, abrasion resistance, and corrosion resistance of the coating layer, and is composed of 50 to 70 parts by weight of a silane compound and 30 to 50 parts by weight of silica sol based on 100 parts by weight of the inorganic binder.

The silane compound is an inorganic binder serving as a binder, and more specifically, alkoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, phenyltrimethoxysilane, vinyltrimethoxysilane, and trifluoropropyltrimethoxysilane. It is preferable to select and use one or more of them.

Silica sol is an inorganic compound bonded by chemical reaction with a silane compound, and the silica sol used in the present invention contains 15 to 37 parts by weight of amorphous silica and 5 to 15 parts by weight of isopropyl alcohol based on 100 parts by weight of the inorganic coating composition. It is preferable to mix parts by weight, and the mixing amount can be appropriately adjusted if necessary.

The filler is a substance used to improve the physical and chemical properties of the coating film by preventing cracks and controlling the viscosity of the coating film between the silane compound and the silica sol. It is preferable to select and use one or more of silicon compounds such as titanium, potassium titanate and alumina, natural mineral group, or dimethyl polysiloxane.

In addition, the functional ceramic powder is preferably mixed in an amount of 5 to 20 parts by weight based on 100 parts by weight of the ceramic coating composition to improve mechanical properties of the coating film and to emit antibacterial properties, far-infrared radiation, and anions. When the mixing amount of the functional ceramic powder is less than 5 parts by weight, antibacterial properties and far-infrared ray and anion emission effects cannot be expected, and when it exceeds 20 parts by weight, the state change of the coating film and adhesive strength may be deteriorated.

In the present invention, the material used as the functional ceramic powder is one of zirconium dioxide, silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, magnesia, tourmaline, ocher, limite, amethyst, raw ore, strontium, vanadium, zirconium, zirconia, and cerium. It is preferable to select and use a species or more.

In addition, the building material surface finishing composition according to the present invention uses pigment powder to give the color of the coating film, and the mixing amount of the pigment powder is preferably 1 to 15 parts by weight based on 100 parts by weight of the ceramic coating composition, but the color of the pigment or the consumer It is not necessarily limited to the range set according to the requirements of the manufacturer or the needs of the manufacturer, and can be appropriately adjusted by the chroma, brightness, etc. of the pigment powder.

Another embodiment of the present invention provides a manufacturing method in which all raw materials prepared in the preparation of the building material surface finishing composition are ball milled, uniformly pulverized into fine nanoparticles having a size of 50 to 100 nm, and then mixed.

When raw materials are uniformly pulverized into nanoparticles, the ceramic coating composition is uniformly mixed, the coating film formation time is shortened, and the strength of the formed coating film is increased. In addition, anion emission and far-infrared radiation amount are remarkably increased compared to the method in which the raw material is not pulverized.

The ball used in the crushing process is preferably a ceramic material having a diameter of 3 to 150 mm, and treated for 4 to 12 hours at a rotational speed of 100 to 300 rpm.

Another embodiment of the present invention uses a brush, roller, or air spray as a treatment method for the finishing material composition that blocks asbestos from scattering from building materials containing asbestos and provides functionalities beneficial to the environment and human health. It provides a method for stabilizing asbestos solid components, characterized in that the application is repeated twice.

It is preferable that the thickness of the coating film of the finishing material finally formed by the above treatment method is 80 to 100 μm, and since the thickness in the above range cannot be obtained with one application, the coating operation is performed twice, and the amount of the finishing material used is It is preferable to make it about 0.2 to 0.4 kg/m ² . If the thickness of the coating film is less than 80 μm, there is a possibility of asbestos scattering, and if the thickness exceeds 100 μm, the consumption of materials increases, which may become uneconomical.

During the solid stabilization treatment of the asbestos component, the working environment temperature is preferably 5 to 30 ° C, and at a high temperature exceeding 30 ° C, the coating film dries too quickly, resulting in pinholes. Defects such as swelling may occur, and drying of the coating film is delayed at a low temperature of less than 5 ° C, and flow may occur.

In addition, the working environment humidity is preferably in the range of 65 to 85%. In a high humidity environment exceeding 85%, the drying time is delayed by suppressing solvent evaporation, and in a low humidity environment of less than 65%, the drying time is too short, making it difficult to paint evenly and condensation of moisture may occur, resulting in reduced adhesion. In addition, it is okay to construct when the moisture content of the substrate is within 50%, and the relative humidity in the air is 85% in the case of the top coat. Painting should be prohibited when the surface moisture content is more than 8%.

In the case of solid stabilization treatment of the asbestos component of the asbestos-containing building material, one or more of a brush, a roller, and an airless spray may be used as a tool for construction depending on the working place or working conditions.

Hereinafter, the present invention will be described in detail by examples. However, the following examples are intended to illustrate the present invention, and the content of the present invention is not limited by the examples.

Example 1

30 parts by weight of porous silica, 10 parts by weight of isopropyl alcohol, 5 parts by weight of butyl cellusolve, 30 parts by weight of alkoxysilane, 5 parts by weight of dimethylpolysiloxane, 4 parts by weight of titanium dioxide, 5 parts by weight of pigment black oxide, Raw materials are prepared in a ratio of 10 parts by weight of aluminum oxide and 1 part by weight of zirco aluminate. Each raw material was treated at 200 rpm for 1 hour using a 3 mm size ceramic ball, pulverized, and mixed according to each ratio to prepare an eco-friendly surface finishing composition for asbestos-containing building materials.

The prepared surface finishing material composition was applied to the gypsum board from which impurities were removed twice with a brush so that the thickness of the coating film was 90 μm.

The curing time of the coating film on the surface of the gypsum board at each temperature under the above conditions was measured as follows.

In addition, the drying time, re-coating interval, and material consumption during the first and second coats are shown in Table 2 below, respectively.

Experimental Example 1: Asbestos Scattering

After treating the gypsum board with a surface finish, it was tested whether asbestos would scatter.

The samples before and after asbestos solidification stabilization were subjected to vibration, and the concentration of asbestos fibers dispersed by the vibration was measured using a phase contrast microscope for comparative analysis.

For vibration crushing, a sieve shaker (domestic product) was used. The vibration condition was maintained for 10 minutes with an amplitude of 2 mm. Simultaneously with vibration, an asbestos collection kit in the air was installed at the inlet to collect samples in the air at a flow rate of 10 L/min and used as analysis samples.

Samples were collected according to the pretreatment of the analysis sample, and then analyzed with a phase contrast microscope according to the indoor air quality process test standard, and the results are shown in Table 4 below. At this time, a gypsum board not treated with a surface finish was used as a comparative example.

Experimental Example 2: Antibacterial activity test

Using the surface finish treated gypsum board prepared in Example 1, a specimen having a width of 2 cm × a length of 2 cm was prepared. Escherichia coli (Escherichia Coli ATCC 25922) and Staphylococcus aureus (Staphylococcus aureus ATCC 6538) were used as the test strains, and culture solutions were prepared by culturing the bacteria in a 36° C. incubator for 16 hours, respectively.

Each test strain culture solution is diluted 20,000 times in the prepared specimen, and 1ml is dropped on the specimen, stored at 25℃ for 24 hours, and then taken out. It was cultured for 48 hours in a sterilized agar medium, and the number of viable cells was measured by irradiation using a wet plate culture method. And the sterilization rate (%) was calculated according to the formula below, and the results are shown in Table 4 below.

Sterilization rate (%) = [(Number of viable cells in diluted solution - Number of viable cells after storage for 24 hours)] × 100

As shown in Table 4, the gypsum board treated with the surface finishing material prepared in Example 1 showed 99.9% of antibacterial activity, but the untreated comparative example did not show antibacterial activity.

Experimental Example 3: Far Infrared Emissivity

The prepared surface finishing material-treated gypsum board was commissioned by the Korea Far Infrared Ray Application Evaluation Institute to conduct far infrared emissivity and radiant energy measurement tests, and the results are shown in Table 5 below.

This test was conducted at 150 ° C, and is a result of measurement against a black body using an FT-IR spectrophotometer. If the far-infrared emissivity is 0.8 or more, it is evaluated as high, and in the case of the ceramic coated frying pan of the present invention, it showed a very high far-infrared emissivity as 0.911.

Claims (5)

Asbestos containing 40 to 84 parts by weight of an inorganic binder composed of 50 to 70 parts by weight of a silane compound and 30 to 50 parts by weight of silica sol, 16 to 38 parts by weight of a filler, 5 to 20 parts by weight of a functional ceramic powder, and 1 to 15 parts by weight of a pigment powder Surface finish composition of building materials. According to claim 1,
Materials used as the functional ceramic powder include zirconium dioxide, silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, magnesia, tourmaline, ocher, limite, amethyst, raw ore, strontium, vanadium, zirconium, zirconia, and cerium. A surface finish composition for asbestos building materials, which is at least one inorganic material selected from the group consisting of As a treatment method for preventing asbestos from scattering from building materials containing asbestos,
A building material in which the surface finishing material of the asbestos building material according to the method of claims 1 or 2 is applied 1 to 3 times on the surface of the building material at a rate of 0.2 to 0.4 kg/m ² so that the thickness of the coating film is 80 to 100 μm. Asbestos component solid stabilization treatment method. According to claim 3,
In the case of the first painting, the surface moisture content of the building material is within 50%, and in the case of the second and subsequent painting, the surface moisture content is within 8%, the humidity of the working environment is 65 ~ 85%, and the working environment temperature is 5 ~ 85%. A method for solid stabilization of asbestos components in building materials at 30℃. According to claim 3,
Asbestos component solid stabilization treatment method of asbestos component solid stabilization treatment method of asbestos component solid stabilization treatment of building materials in which at least one of the brush, roller, and airless spray is used as a work tool depending on the working place or working conditions.

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