KR20050090141A - The preparation of water-borne layered coating materials for noise suppression of building floors - Google Patents

Abstract

According to the present invention, the construction of a multi-family house is carried out step by step on the upper floor of the ondol mortar layer before the construction of the floor covering made of synthetic resin or wood to effectively prevent the inter-layer noise generated by vibration, shock and other sound sources inside the building. It is to provide an aqueous coating-type flooring material for reducing noise, which can be absorbed to create a comfortable living environment.

The water-borne coating layer for floor noise reduction in multi-unit houses according to the present invention comprises a mixture of waste tire rubber chips and an aqueous binder containing thermally conductive and flame retardant fillers, and is constructed with a thickness of about 5 mm and is constructed with an impact relief layer (underfloor) and In addition, it is characterized by consisting of a laminated composite material of the method of sequentially applying a finish layer (top) mixed with an aqueous binder having thermal conductivity, flame retardancy and rigidity on top of the impact buffer layer to a thickness of about 1.5mm.

The noise reduction material provided in the present invention maintains excellent sound insulation and provides flame retardancy in two stages in accordance with the interior material specification of the building, minimizes the inherent odor of waste tires, and does not contain volatile organic compounds that are harmful to the human body. By including an acrylic emulsion, the safety of workers as well as the user is considered.

The present invention mixes the water-based binder and waste tire rubber chips with heat conductive and flame retardant fillers as a main component in a constant ratio to construct them on top of the ondol mortar of the building, and after stacking the multifunctional finishing material again, drying and curing at room temperature to make noise and vibration. And it aims at providing the interior material which is excellent in the impact sound reduction.

Description

The preparation of water-borne layered coating materials for noise suppression of building floors}

It is a first object of the present invention to provide a floor soundproofing dustproof material for a top of ondol mortar in which a waste tire rubber chip and an aqueous latex are mixed.

It is a second object of the present invention to provide a floor soundproofing dustproof material which can be placed and laminated in the field.

It is a third object of the present invention to provide an aqueous floor soundproofing dustproof material having thermal conductivity.

It is a fourth object of the present invention to provide a composite floor soundproofing dustproof material for laminating heterogeneous flooring materials having different rubber hardness.

The present invention relates to flooring for floor noise reduction of a multi-family house. More specifically, the present invention relates to a soundproofing floor covering for coating type construction that can efficiently absorb the causes of vibrations, shocks and other noises between floors in a multi-family house to create a comfortable environment in the room.

In general, concrete structures with rigidity have sufficient blocking performance against air transfer, but in the case of solid transfer caused by direct impact on the concrete surface such as running or walking on the upper floor, the vibration damping ability of the concrete itself is achieved. Since this is very small, there is a problem in that noise toward an adjacent generation occurs. In order to solve these problems, the government has already deliberated the legislation aimed at strengthening the noise standard of multi-unit housing in "Regulations on Housing Construction Standards" last year and announced that it will be implemented from April 2004. In addition, in recent years, home construction companies are increasing their interest in interlayer sound insulation materials more than ever by reinforcing the concrete slab thickness to 200 mm or more and utilizing materials with excellent sound insulation performance.

Most of the building sound insulation materials currently distributed and constructed in Korea are manufactured on sheets, and are designed to be placed on top of interlayer slabs or lightweight foam concrete layers of buildings. In such a case, the construction specification (thickness) of the sound insulation material becomes larger than necessary because of the high load structure such as the light concrete layer and the ondol mortar located on the sound insulation material, and there is a possibility that the sound insulation material layer may be settled by the upper structure in the long term. Therefore, it is difficult to expect a continuous sound insulation effect, it may cause the cracks of the bottom surface due to the weak ground structure, it may impair the stability of the structure in the long term. Also, in this case, it is possible to apply collectively only to new or large-scale construction, to have high cost in case of defects in the building, and to have a potential disadvantage of causing disputes depending on the material responsible for the sound insulation performance effect.

In view of the above problems, the present inventors can install in a convenient way for new and enlarged buildings without damaging the structural stability of the existing building, so that the laminated noise reduction can be reduced to primarily reduce solid-state transmission, which is a representative source of noise. It is to provide building interior flooring.

In the present invention, by using waste tire rubber chips, which are representative recycled resources, as a filler, the present invention provides a laminated noise reduction material composed of a layer that primarily absorbs shock and a finish layer that complements poorly retained properties.

In the related art, Korean Patent Publication No. 20-0325523 (Invention name: Elastic flooring material having a top coat layer formed) and 20-0325523 (Invention name: Flooring material using waste tire rubber chip) include waste tire rubber chips. It is a composition in which a polyurethane binder is mixed, and the rubber particles used at this time are large and non-uniform, which makes it difficult to control proper rubber elasticity and impair the safety of workers as well as users by using polyurethane-based binders or adhesives containing volatile organic solvents. As a result, there is a drawback that there are limitations in expanding the use as well as the interior materials of buildings.

The present invention has been made in consideration of the problems of the above two kinds of sound insulating flooring, and has an ondol mortar layer so as to primarily reduce solid transfer sound, which is a representative source of household noise, without affecting the structure of an existing building. A blend of a waste tire rubber chip with an aqueous latex binder containing a thermally conductive and flame retardant filler is applied to the upper portion of a thickness of about 5 mm, dried and cured at room temperature, and then the thermally conductive, flame retardant, and reinforcing filler is added to the aqueous binder. It provides a built-in flooring material for noise reduction of the compounded with and laminated to a thickness of about 1.5mm.

The shock-absorbing layer according to the present invention used a granule-type rubber chip having a large surface area (grain size of 30 to 40 mesh) for the purpose of reinforcing the inherent hardness of the waste tire rubber chip and adjusting the elastic strength, and on the ondol mortar layer of the building. An aqueous latex mixture was used as a binder to impart both thermal conductivity and flame retardancy to meet the criteria for construction interior materials to be constructed.

The finishing layer according to the present invention is a sound-proof coating material having a solid property, a flame-retardant acrylic emulsion imparting high rigidity for the purpose of preventing a shock-absorbing layer having a certain elasticity from being deformed by an externally acting force and dispersing or reflecting the impact sound. Mixture.

The present invention is a coating-type double floor material in which the above-mentioned shock absorbing layer and the finishing layer are sequentially stacked on the top of the ondol mortar in order to reduce the noise generated in the interior of the building, and does not contain volatile organic compounds harmful to human body. It is an object of the present invention to provide a noise-saving building interior flooring material that is characterized by considering the safety of both the contractor and the user by using aqueous latex and acrylic as a binder.

Hereinafter, the present invention will be described in detail.

The shock-absorbing layer used in the present invention is a waste tire rubber chip having a uniform particle size and an aqueous binder mixed with a thermally conductive and flame retardant filler, which is applied at an upper portion of the ondol mortar layer. The waste tire rubber chip has a particle size of 0.4 to 0.6. It refers to the milled product of the granule waste tire of mm (40 ~ 30mesh).

The thermally conductive and flame-retardant aqueous binder used in the impact mitigating layer of the present invention is a room temperature dry hardening type mixture composed of styrene-butadiene latex as a main material and is composed of the following composition ratio.

Styrene-butadiene latex 90-110 parts by weight

Graphite 45 ~ 55

Parts by weight

Aluminum hydroxide 40-50

Parts by weight

Other fillers 10-15

Parts by weight

Additive 3 ~ 5

Parts by weight

Water 10-20

Parts by weight

Styrene-butadiene latex is an aqueous emulsion exhibiting excellent rubber elasticity over a wide temperature range after drying, and a product having a solid content of 48 to 50% is used. Graphite is one of the fillers with the best thermal conductivity, and is a component for efficiently increasing the thermal conductivity of the binder characteristicly provided in the present invention. When used in an excessive amount, graphite causes an increase in viscosity. It not only affects, but also increases the price of the product. Aluminum hydroxide is a filler used to impart flame retardancy that must be achieved because the sound insulating material of the present invention belongs to the interior material of the building. If too much amount is used, the properties of the binder become stronger after drying, and thus the elasticity of the shock absorbing layer cannot be expected. In order to increase the flame retardancy of the entire sound insulation material, more amount than the size included in the impact mitigating layer is required. Therefore, it is designed to realize higher flame retardancy by adding the shortage to the finishing material layer. Other fillers were added for the purpose of improving the resilience of the sound insulating material by controlling the stiffness of the binder and primarily reducing the inherent odor emitted from the waste tire rubber chips. As the additive, a dispersant, a wetting agent, an antifoaming agent, and the like, which are generally used for mixing the binder, were used at a predetermined ratio. Water was used to control the latex concentration in the mixture, the viscosity of the binder and the dry curing time. The binder for impact buffer layer blended in the above ratio is a liquid mixture having a solid content of 63-68% and a viscosity of 1,500-2,500 cps. The binder is mixed with the above-mentioned waste tire rubber chip at a predetermined ratio to seal the solid content, and at the construction site, the package can be opened and poured to obtain an effect as an impact mitigating layer provided in the present invention.

The present invention will be described in more detail with reference to the following examples.

<Example 1>

After uniformly mixing 100g of waste tire rubber chips with a particle size of 0.4 ~ 0.6mm and 100g of binder with solid content of 68% at room temperature, 200mL of this mixture is poured into a mold with an area of 400cm ^{2 and} 5mm thick, and then the surface is evened with a metal rod. The drying time and curing time were measured in a drying apparatus where temperature (20 ℃) and humidity (60%) were kept constant, and the dimensional change, rubber hardness and density before and after complete curing were measured.

<Example 2>

After uniformly mixing 120g of waste tire rubber chips with a particle size of 0.4 ~ 0.6mm and 100g of binder with solid content of 68% at room temperature, take 200mL of this mixture and pour it into a mold with an area of 400cm ^{2 and a} thickness of 5mm. The drying time and curing time were measured in a drying apparatus where temperature (20 ℃) and humidity (60%) were kept constant, and the dimensional change, rubber hardness and density before and after complete curing were measured.

Example 3

After uniformly mixing 140g of waste tire rubber chips with a particle size of 0.4 ~ 0.6mm and 100g of binder with 68% of solid content at room temperature, 200mL of this mixture is poured into a mold of area of 400cm ^{2 and} 5mm thick, and the surface is evenly made with a metal rod. The drying time and curing time were measured in a drying apparatus where temperature (20 ℃) and humidity (60%) were kept constant, and the dimensional change, rubber hardness and density before and after complete curing were measured.

Example 4

160g of waste tire rubber chips with a particle size of 0.4 ~ 0.6mm and 100g of binder with a solid content of 68% are uniformly mixed at room temperature. Then, 200mL of this mixture is poured into a mold of 400mm ² thickness of 5mm, and the surface is evened with a metal rod. The drying time and curing time were measured in a drying apparatus where temperature (20 ℃) and humidity (60%) were kept constant, and the dimensional change, rubber hardness and density before and after complete curing were measured.

The table below shows the measurement results according to the above embodiment.

<Table>

Example Solid content (%) Drying time Curing time Dimensional rate of change (%) Rubber Hardness (JIS S6050) density One 84 16 26 Less than 2 50.8 0.83 2 85 12 21 Less than 2 44.8 0.71 3 86 8 16 Less than 2 40.0 0.65 4 88 6 12 Less than 2 36.0 0.64

As can be seen from the above table, the impact buffer layer according to the present invention contains solids in the range of 84% to 88% depending on the content ratio of the tire chip and the binder, and the impact buffer layer constructed under the same conditions is dried in accordance with the embodiment. The working time was sufficient as a minimum of 6 hours and a maximum of 16 hours, and the higher the content of the binder, the longer the drying time. Preferably, as in Examples 3 and 4, the dry touch time is within a range of 10 hours at room temperature, so that the subsequent process may be performed more quickly.

As the moisture contained in the shock-absorbing layer is dried more than 90%, the product has physical properties close to complete curing, and in the case of Example 4, it contains the highest solid content and accordingly shortens the curing time, 12 hours after the first construction Construction of the finishing sound insulation material, which is a subsequent process, can be performed.

The shock-absorbing layer of the present invention was able to be adhered to the top of mortar in the field without a separate primer process, and the dimensional change after drying was less than 2%, and it was difficult to discern the difference. There was no phenomena such as presence and chemical reaction. If a primer having a respective function is used to achieve a desired purpose such as waterproofing of a building, the shock absorbing layer of the present invention can be used as a flooring material for building interior having a comprehensive function.

As a result of measuring the rubber hardness (JIS S6050) of the completely dry hardened impact buffer layer, the range was 36.0 to 50.8 depending on the embodiment, showing a tendency to increase as the binder content increased, and preferably the rubber chip content was high. In the case of Examples 3 and 4, soft physical properties were shown. The density of the impact buffer layer prepared under the same conditions tended to decrease as the rubber chip content ratio increased. The range was 0.64 to 0.83 g / mL, which was higher than the average density of the rubber chip of 0.5 g / mL. This result is the phenomenon that the water binder having the function of thermal conductivity and flame retardancy fills the voids of the rubber chip during the compounding process, and the adjustment of the porosity makes it easy to control the properties of the impact mitigating layer. There is a feature that makes it possible to manufacture an impact buffer layer.

The finishing material according to the present invention is a sound insulating coating material having solid properties, and when applied to a sheet made of soft synthetic resin, etc., prevents the shock-absorbing layer having a certain elasticity from being deformed by the force acting on the top and dispersing or reflecting the impact sound. It is a flame-retardant acrylic emulsion mixture imparted high rigidity for the purpose. In addition, the sound-proof finish material is to increase the flame retardancy as interior materials by supplementing the flame retardant material lacking in the thermal conductivity as well as the amount of shock-absorbing layer. Basically, the finishing material is a room temperature dry-curable mixture whose main material is aqueous acrylic emulsion, considering the thermal conductivity, rigidity, and flame retardancy, as well as waterproofing and aesthetics.

Acrylic emulsion 80 ~ 100 parts by weight

Graphite 15-20

Parts by weight

Aluminum Hydroxide 50 ~ 60

Parts by weight

100 to 130 parts by weight of reinforcing filler

3 to 5 parts by weight of other additives

Water 10 ~ 15

Parts by weight

The acrylic emulsion was used as an aqueous solution having a solid content of 48 to 52% as an aqueous solution showing solid characteristics over a wide temperature range after drying. Graphite is one of the fillers having the most excellent thermal conductivity and is a component for efficiently increasing the thermal conductivity characteristicly provided in the present invention, and the amount thereof is minimized because the thickness of the top coat is designed to be thin. Aluminum hydroxide, a flame retardant imparting filler, was used to impart flame retardancy that must be achieved because the sound insulating material of the present invention belongs to the interior material of a building, and the amount of the flame retardant was maximized to increase the content of the flame retardant component. The reinforcing filler was used to improve the rigidity of the binder and was added to minimize the structural deformation of the sound insulation material which could be caused by the heating of the ondol and to reduce the odor of the waste tire rubber chips contained in the shock absorbing layer. . Other additives generally used a dispersant, a wetting agent, an antifoaming agent, a leveling agent, and the like, which are used in the mixing of the binder in a proportion. Water was used to control the solids concentration of the emulsion in the mixture, the viscosity of the binder and the curing time. Finishing materials prepared as above is a liquid mixture having a solid content of 75 ~ 78% and a viscosity of 2,500 ~ 3,000 cps. Finishing the mixture first on a well-dried impact-buffered layer can fill the rough surface and voids that occurred during the dry-cure process of the impact-buffered layer, and reapplying it after the primary drying makes the surface stronger and smoother, resulting in a finish such as slate or veneer Plasterer can be easily installed.

The noise reduction material between floors of multi-unit houses of the present invention is a coating-type elastic flooring material mixed with a rubber chip and a functional aqueous binder, which is effectively applied to a method of forming a composite layer on the ondol mortar step by step to effectively reduce the cause of noise such as impact. You can.

The interior material for noise reduction according to the present invention is a new type of building interior material, which not only achieves efficient use of energy by maintaining the flow of heat transmitted from ondol in consideration of high thermal conductivity as well as mitigating external impact and flame retardancy. By using recycled resources such as waste tire rubber chips or graphite dust and using an aqueous binder that does not contain volatile organic compounds that are harmful to humans, it has an excellent effect in terms of environment friendliness.

The present invention is useful to provide an environmentally friendly floor noise reduction flooring material that can prevent new pollution caused by noise by installing on the concrete slab of new and existing residential multi-family house or on the floor of public places such as officetel, hotel, hospital, etc. .

1 is a laminated construction of the flooring for reducing the noise between the floor according to an embodiment of the present invention

Figure 2 is a detailed view of the laminated floor noise reduction floor according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

1, 5, 6: Ondol mortar layer and Ondol pipe 2: Shock absorbing layer

3: finishing layer 4, 10: plastering (plaque and veneer)

7: waste tire rubber chip 8: heat conductive and flame retardant aqueous binder

9: heat conductive and flame retardant aqueous finish

Claims (3)

In the noise reduction floor of the apartment, a composite of a shock-absorbing layer (rubber chip layer) having a thickness of about 5 mm, and a high-strength finishing layer having a thickness of about 1.5 mm on the impact-releasing layer in order on top of the ondol mortar layer. Dry-curable aqueous coating type soundproof dustproof material, characterized in that the structure According to claim 1, The impact buffer layer is 90 to 110 parts by weight of styrene-butadiene latex having a solid content of 48%, 45 to 55 parts by weight of graphite having a particle size of 300 mesh, 40 to 50 parts by weight of aluminum hydroxide having a particle size of 200 mesh, 100 to 100 parts by weight of the mixture using other additives and 13 to 25 parts by weight of water and 100 to 160 parts by weight of granule-type waste tire rubber chips having a particle size of 0.4 to 0.6 mm (30 to 40 mesh) were mixed to obtain 84 to 88% of solid content. Floor soundproof dustproof material characterized by blended as possible. According to claim 1, the finishing layer is 80 to 100 parts by weight of a high strength acrylic emulsion after drying, 15 to 20 parts by weight of graphite having a particle size of 300 mesh, 50 to 60 parts by weight of aluminum hydroxide, 300 mesh of calcium carbonate and talc having a particle size of 100 ~ 130 parts by weight, and 13 ~ 20 parts by weight of other additives and water, coating type soundproof dustproof finish characterized by 75 ~ 78% solids