KR20120073498A

KR20120073498A - Environment friendly surface finishing materials for asbestos construction materials

Info

Publication number: KR20120073498A
Application number: KR1020100135285A
Authority: KR
Inventors: 정택식
Original assignee: 정택식
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2012-07-05

Abstract

PURPOSE: An environmentally-friendly surface finishing material for asbestos-containing construction material and a solidity stabilizing method of asbestos components are provided to prevent asbestos from being scattered from construction materials at low cost. CONSTITUTION: An environmentally-friendly surface finishing material for asbestos-containing construction material comprises 46-75 parts by weight of inorganic binders, 10-39 parts by weight of fillers, 5-20 parts by weight of functional ceramic powder, and 1-15 parts by weight of pigment powder. The inorganic aggregate comprises 50-70 parts by weight of silane compound and 30-50 parts by weight of silica sol. A solidity stabilizing method of asbestos component includes 1-3 times of coating steps which coat finishing material on the surface of the construction material at 0.2-0.4 kg/m^2 ratio in order for the thickness of the coating film to be 80-100 microns.

Description

Environment friendly surface finishing materials for asbestos-containing construction materials

The present invention can be optimally used for the prevention of asbestos scattering construction by blocking the asbestos from the building materials containing asbestos, as well as the adsorption decomposition of toxic organic substances, such as formaldehyde, the emission of far infrared rays and anions, antibacterial Excellent anti-mildew, deodorizing effect, heat conductivity reduction, air permeability, humidity control and condensation prevention effect, flame retardancy, water resistance, adhesiveness, minimizing risk for environmental pollution and beneficial to human health It relates to a surface stabilizing material and a solid stabilization treatment method of asbestos components.

Asbestos is 0.02 ~ 0.03 ㎛ in diameter, has a very strong flexibility and heat resistance and has a weak acidity. It is used in various fields from construction to automobile manufacturing and household goods. It is used in over 3,000 kinds of industrial products. Prior to the Industrial Revolution, the demand for high temperature resistant fibers was not high, but since the 20th century, asbestos has been widely used as interior and exterior materials for construction and industrial raw materials due to its excellent thermal insulation, heat resistance, insulation properties, and low cost.

Recently, asbestos is sucked into the lungs, it is known that it will cause malignant diseases such as lung cancer, and as awareness of the harmfulness of asbestos increases, asbestos production is decreasing, and asbestos substitutes have been developed and used.

Asbestos was initially considered to be a material that did not adversely affect health because of mineral silicate, but when OSHA accumulates asbestos dust through the respiratory tract, it causes malignant mesothelioma and lung cancer after 2-30 years. As a first-class carcinogen, and as many as tens of thousands of people die from asbestos every year, countries around the world, including Korea, are putting in astronomical budgets to remove asbestos.

Asbestos is composed of white asbestos, brown asbestos, blue asbestos, etc., and more than 95% of asbestos is used in Korea. In Korea, 82% is used for building materials, followed by 11% for automobile brake linings and 5% for fireproof textile products. Asbestos is a harmful substance that adversely affects the health of small amounts, causing asbestosis, lung cancer, malignant mesothelioma, cancer of the pleura and peritoneum.

Asbestos-containing building materials are used as roofing materials, wall materials, or as finishing materials for spraying on walls and ceilings for decoration, acoustic control, and fire protection, and as fireproof coatings on plastering or steel members. Insulation and insulation materials are used in water supply pipes, steam pipes, ducts, boilers and hot water tanks, and are used as vinyl asbestos floor tiles, ceiling tiles, transits or cement boards, wall boards and roof slate.

According to the Asbestos Survey published by the Ministry of Environment in 2009, asbestos-containing materials in public buildings were investigated and the possibility of scattering and asbestos-free materials were used in 224 public buildings to suggest safe management of asbestos-containing materials. As a result of the survey, asbestos was detected in 170 buildings among the 224 public buildings surveyed and showed a detection rate of about 75% .As a result of survey on the status of asbestos detection buildings by facilities, 72% of city halls and wards, 66.7% of libraries, and culture Asbestos was detected in 70.8% of art facilities, 79.3% of community centers, and 72.7% of physical education facilities. 84.6% of buildings before the 1970s, 92.1% of buildings in the 1970s, 86.4% in the 1980s, 85.4% in the 1990s, and 2000 Asbestos was detected in 44.1% of buildings in the 1960s.

In addition, in 2007, as a result of the survey on asbestos use of school buildings and the development of asbestos management standard model, 88% of all suspected asbestos-containing solid samples from 100 schools in Korea, elementary, middle and high schools were found to contain asbestos. It was investigated.

In Korea, it is later than developed countries but later than developed countries. Since 2008, the company has banned the manufacture, use, and import of products with asbestos content exceeding 0.1%. Since 2009, it has been expanded to all asbestos products. In addition, asbestos-related workers and neighboring residents can receive compensation and support when they have asbestos disease.In addition, to monitor and manage the health damage caused by asbestos, the workers' malignant mesothelioma monitoring system is operated, while asbestos manufacturers and mines are nearby. The government decided to investigate the asbestos exposure of residents and provide legal grounds to reward and support them.

On the other hand, domestic legislation related to the removal of asbestos is described in the Industrial Safety and Health Act, the Enforcement Regulations, and the Rules on Industrial Health Standards. Wet work should be done using a humectant. If the workplace is indoors, windows, walls, and floors should be sealed with impermeable barrier materials such as vinyl and kept at a negative pressure, and sanitary facilities such as dressing rooms, shower rooms, work clothes changing rooms, etc. It must be installed and maintained in connection with the workplace. In addition, when the workplace is outdoors, it is required to take measures such as operating an asbestos dust collector equipped with a HEPA filter to prevent asbestos dust from scattering during work. .

However, the above method of dismantling (removing) asbestos-containing facilities or buildings (for example, the ceiling of a school classroom or a public building) is not only expensive, but also has a problem of time constraints due to long-term construction. In addition, there is a problem that waste is generated to generate a secondary environmental problem according to the waste treatment, and additional costs incurred by installing a new facility.

In order to solve the problems of the asbestos dismantling and removal method as described above, a method of using an asbestos solid stabilization solvent for preventing asbestos from being scattered from building materials containing asbestos has been proposed.

This method combines calcium carbonate, resin coating, water and natural oil to prepare asbestos solid stabilization solvent, apply asbestos solid stabilization solvent twice using airless sprayer, and apply flame retardant twice. After using the three-step treatment method of applying a natural antibacterial / deodorant roll again.

However, the above method also has a problem in that the work process is complicated and the time is long and manpower consumption is large, and additional coating is additionally applied to the outside for antibacterial and deodorizing function, so that the functionality cannot be maintained for a long time.

Therefore, the present invention is to solve the above problems, by not dismantling the building materials containing asbestos by a simple coating operation, it is possible to minimize the environmental problems by blocking the asbestos from the building materials as well as low cost. Adsorption decomposition of toxic organic substances such as volatile organic substances, formaldehyde, release of far infrared rays and anions, antibacterial, antifungal, deodorizing effect, excellent thermal conductivity reduction, breathability, humidity control and condensation prevention effect, flame retardancy, water resistance, adhesion It is to provide a surface stabilizing material composition and a solid stabilization treatment method of asbestos components that can change the safe indoor space that is beneficial to the health of the human body with excellent properties.

One aspect of the present invention provides a solid stabilization finish composition of asbestos components to prevent asbestos from scattering from the building materials containing asbestos, and provide functionality beneficial to the environment and human health.

The finish composition is composed of 46 to 75 parts by weight of inorganic binder and 10 to 39 parts by weight of filler, 5 to 20 parts by weight of functional ceramic powder and 1 to 15 parts by weight of pigment.

Another aspect of the present invention provides a method of manufacturing the raw materials prepared in the preparation of the building material surface finishing material composition by ball milling uniformly pulverized into fine nanoparticles of 50 ~ 100 nm size and then mixed.

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

Another aspect of the present invention is to use a brush, a roller, or an air spray injector as a method of treating the finishing composition to prevent asbestos from scattering from asbestos-containing building materials and provide functionality beneficial to the environment and human health. Provided is a method for stabilizing asbestos solid components, characterized in that the coating is repeated twice.

It is preferable that the thickness of the finish coating film finally formed by the 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.

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

As described above, according to the environmentally friendly surface finish of the asbestos building material according to the present invention and the method for treating the same, the asbestos-containing building material is not dismantled to prevent asbestos from scattering from the building material without issuing a separate waste. Adsorption decomposition of human harmful substances such as volatile organic substances, formaldehyde, far infrared and anion release, antibacterial, antifungal, deodorizing effect, excellent thermal conductivity reduction, breathability, humidity control and condensation prevention effect, flame retardancy, water resistance, It is excellent in adhesiveness and can create an environment that is beneficial to human health at low cost. In particular, it can be effectively applied to public facilities such as schools, municipal offices, and childcare facilities. As a result, it is possible to effectively eliminate asbestos risk, a national environmental problem.

1 is a flow chart illustrating a method for manufacturing and treating an environmentally friendly surface finish composition of asbestos building materials of the present invention.

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

One embodiment of the present invention provides a solid stabilizing treatment finish composition of asbestos components to prevent asbestos from scattering from the building material containing asbestos, and provide functionality beneficial to the environment and human health.

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

The inorganic binder is to improve the mechanical and chemical properties and thermal conductivity, such as durability, wear resistance, corrosion resistance of the coating layer, and comprises 50 to 70 parts by weight of the 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 acting as a binder, and more specifically, alkoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, phenyltrimethoxysilane, vinyltrimethoxysilane and trifluoropropyltrimethoxysilane It is preferable to select and use 1 type or more among them.

The silica sol is an inorganic compound which is bonded by chemical reaction with a silane compound, and the silica sol used in the present invention is 15 to 37 parts by weight of porous silica (amorphous silica) and 5 to 15 isopropyl alcohol based on 100 parts by weight of the inorganic coating composition. It is preferable to mix a weight part and the said mixing amount can be adjusted suitably as needed.

Filler is a material used to improve the physicochemical properties of the coating film by preventing cracks and adjusting the viscosity between the silane compound and the silica sol, and to improve physicochemical properties such as durability, aging resistance, and abrasion resistance. It is preferable to use one or more selected from silicon compounds such as titanium, potassium titanate and alumina, a natural mineral group, or dimethylpolysiloxane.

And the functional ceramic powder is preferably 5 to 20 parts by weight based on 100 parts by weight of the ceramic coating composition by mixing to improve the mechanical properties of the coating film, and to release antimicrobial, far-infrared radiation and anion. When the mixed amount of the functional ceramic powder is less than 5 parts by weight, antibacterial and far infrared rays and anion emission effects cannot be expected, and when it exceeds 20 parts by weight, the state change and adhesion of the coating film may be lowered.

The material used as the functional ceramic powder in the present invention is zirconium dioxide, silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, magnesia, tourmaline, ocher, mica, amethyst, raw ore, strontium, vanadium, zirconium, zirconia, cerium 1 It is preferable to select and use species or more.

And the building material surface finish composition according to the present invention uses a pigment powder to give the color of the coating film, the mixing amount of the pigment is preferably 1 to 15 parts by weight based on 100 parts by weight of the ceramic coating composition, the color of the pigment or consumer It is not necessarily limited to the range defined according to the requirements of the manufacturer or the needs of the manufacturer, and may be appropriately adjusted according to the saturation, brightness, etc. of the pigment.

Another embodiment of the present invention provides a method of manufacturing the raw materials prepared in the preparation of the building material surface finishing material composition by ball milling uniformly pulverized into fine nanoparticles of 50 ~ 100 nm size and then mixing.

When the raw material is uniformly ground 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 release and far-infrared radiation are markedly increased compared to the method of not grinding the raw materials.

Another embodiment of the present invention uses a brush, a roller, or an air spray injector as a method for treating the finishing composition to prevent asbestos from scattering from building materials containing asbestos and to provide functional and beneficial functions to the environment and human health. It provides a method for stabilizing asbestos solid components characterized in that the coating is repeated twice.

It is preferable that the thickness of the finish coating film finally formed by the treatment method is 80 ~ 100 μm, the thickness of the above range can not be obtained by one application, and the application is carried out twice. It is preferable to make it become about 0.2-0.4 kg / m <2>. If the thickness of the coating film is less than 80 μm, there is a possibility of asbestos scattering. If the thickness is more than 100 μm, the consumption of materials increases, which may be uneconomical.

In 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 to pinhole. Defects such as swelling may occur, and at low temperatures below 5 ° C., drying of the coating may be delayed and flow may occur.

In addition, the working environment humidity is preferably in the range of 65 to 85%. In the high humidity environment of more than 85%, the drying time is delayed by inhibiting the solvent evaporation, the drying time is too short in the low humidity environment of less than 65% is difficult to evenly paint work, water condensation may occur may cause a decrease in adhesion. In addition, if the moisture content of the lower surface is 50% or less, it can be installed. In the case of the upper coat, the relative humidity in the atmosphere is 85%. If the surface moisture content is more than 8%, painting should be prohibited.

Asbestos-containing solid materials of the asbestos-containing building materials in the stabilization treatment process work tools can be constructed by using one or more of the brush, roller, airless spray according to the work place or working conditions.

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

30 parts by weight of porous silica, 10 parts by weight of isopropyl alcohol, 5 parts by weight of butyl celusolve, 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, The raw material is prepared by the ratio of 10 weight part of aluminum oxides and 1 weight part of zirco aluminates. Each raw material was treated by grinding for 1 hour at 200 rpm using a ceramic ball of 3 mm size and mixed according to each ratio to prepare an environment-friendly surface finish material composition of asbestos-containing building materials.

The surface finish material composition prepared on the gypsum board from which impurities were removed was applied 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 each gypsum board under the above conditions was measured as follows.

division 10 ℃ ~ 25 ℃ 26 ℃ ~ 30 ℃ Dry touch in 1 hour Within 30 minutes Curing drying Within 4 hours Within 3 hours Repaint interval Within 4 hours Within 3 hours Fully cured After 24 hours After 18 hours

In addition, the drying time, re-coating interval, and material consumption during coating once and twice are shown in Table 2, respectively.

division How to paint Dry touch
(20 ℃) Dry touch
(30 ℃) Repaint interval Material consumption
(Kg / ㎡) 1st painting Brush and roller
Airless Spray 1 hours 30 minutes 3 hours 0.1 to 0.15 2 times painting 1 hours 30 minutes 4 hours 0.1 to 0.15

Experimental Example 1: Asbestos scattering

After the surface finish on the gypsum board was tested for asbestos scattering.

Before and after the asbestos solid stabilization treatment, the samples were subjected to vibration, and the concentration of asbestos fibers scattered by the vibration was measured using a phase contrast microscope and analyzed.

Vibration crushing was used a sieve shaker (domestic). Vibration conditions were continued for 10 minutes with an amplitude of 2 mm. Simultaneously with the vibration, an asbestos collecting kit in air was installed at the inlet, and the sample in the air was collected at a flow rate of 10 L / min and used as an analytical sample.

Samples were collected according to the analytical sample pretreatment and analyzed by phase contrast microscope according to the test standard for indoor air quality. The results are shown in Table 4 below. At this time, the gypsum board without the surface finish was treated as a comparative example.

Fiber density per unit area (pcs / m ² ) Example Not detected Comparative example 56.4

Experimental Example 2 Antibacterial Activity Test

Using the surface finish gypsum board prepared in Example 1 to prepare a specimen of 2cm × 2cm in length. E. coli (Escherichia Coli ATCC 25922) and Staphylococcus aureus ATCC 6538 were used as test strains, and the cultures were prepared by incubating the bacteria for 16 hours in a 36 ° C. incubator.

Dilute each test strain culture solution 20,000 times to the prepared specimens, add 1 ml to the specimens, and store at 25 ° C for 24 hours. This was incubated for 48 hours in a sterilized agar medium and examined by the wet plate culture method to measure the number of viable cells. And the sterilization rate (%) was calculated according to the following formula, the results are shown in Table 4 below.

Sterilization Rate (%) = [(Viable Count of Diluent-Viable Count after 24 Hours Storage)] × 100

Classification Strain Example Comparative example Escherichia coli 99.9 10 ^-2 Staphylococcus 99.9 10 ^-2

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

Experimental Example 3: Far Infrared Emissivity

The surface finish material treated gypsum board was commissioned by the Korea Far Infrared Ray Evaluation Institute, and the far infrared emissivity and radiation energy measurement test was performed, and the results are shown in Table 5 below.

Emissivity (5 ~ 20μm) Radiation energy (W / m ² μm, 150 ℃) 0.911 1.52 X 10 ³

This test was conducted at 150 ° C., and is a result of measuring the black body using the FT-IR spectrophotometer. The far-infrared emissivity was evaluated as high when it was 0.8 or more. In the ceramic coating frying pan of the present invention, it was 0.911, which showed very high far-infrared emissivity.

The heating cooking apparatus of the present invention increases the thermal conductivity during cooking by heating and irradiating anion and far-infrared rays on the surface of the metal material used as the main body, and laminating inorganic ceramic coating layers having non-tackiness and antimicrobial properties, so that food is not burned or pressed. It is easy to clean cooking utensils, and it is excellent in corrosion resistance and abrasion resistance, and by processing circular grooves on the bottom surface, it is possible to capture the combustion energy released into the atmosphere as much as possible, saving energy, It can be used in cooking vessels, such as a frying pan, pot, pot, kettle for cooking food to deliver.

Claims

Asbestos containing 50 to 70 parts by weight of inorganic binder consisting of 50 to 70 parts by weight of silane compound and 30 to 50 parts by weight of silica sol, 10 to 39 parts by weight of filler, 5 to 20 parts by weight of functional ceramic powder, and 1 to 15 parts by weight of pigment. Surface finish composition of building materials

The method of claim 1,
The functional ceramic powder is a material used as a functional ceramic powder is zirconium dioxide, silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, magnesia, tourmaline, ocher, lignite, amethyst, raw ore, strontium, vanadium, zirconium, zirconia, cerium Surface finish composition of asbestos building material, 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,
The construction material of the asbestos building materials according to the method of claim 1 to 2 applied to the surface of the building materials 1 to 3 times at a rate of 0.2 ~ 0.4 ㎏ / ㎡ so that the coating film thickness of 80 ~ 100 μm. Asbestos Solid Stabilization Method

The method of claim 3,
In the case of the primary painting, the surface moisture content of the building materials is less than 50%, in the case of the painting after the second one, the surface moisture content is less than 8%, the humidity in the working environment is 65 ~ 85%, and the working environment temperature is 5 ~. Asbestos solid stabilization treatment method for building materials at 30 ℃

The method of claim 3,
Asbestos-based solid stabilization treatment method for asbestos-containing building materials As a work tool, one or more of brush, roller or airless spray can be selected according to the work place or working conditions.