KR100483965B1 - Polyurethane Type Soundproofing Between Floors And Pour-in-Place Method - Google Patents

Abstract

The present invention relates to a method for constructing a polyurethane-based interlayer sound insulation material, which has excellent physical properties and effectively blocks light impact sound and heavy impact sound, which can be usefully used as a sound insulation for noise blocking of apartment houses, as well as a simple manufacturing process to improve productivity. In order to provide sufficient flame retardancy and at the same time to prevent the propagation of fire in the event of fire to provide a construction method of the polyurethane-based interlayer sound insulation material, the present invention to achieve the above object In the sound insulation material construction method to reduce the impact sound of the apartment house by constructing a light-weight foam concrete layer and heating piping and finishing mortar layer sequentially after forming the interlayer sound insulation layer on the slab layer, the interlayer sound insulation layer is a concrete slab layer Top coated polyurethane prepolymer After the treatment to form a primer layer, and foamed polyurethane at room temperature thereon to form a sound absorbing layer, the polyurethane-based interlayer sound insulating material, characterized in that to form a sound insulating layer by coating a polyurethane of high hardness to the upper end Provide construction method.

Description

Polyurethane Type Soundproofing Between Floors And Pour-in-Place Method

The present invention relates to a method for constructing a polyurethane-based interlayer sound insulation material, and more particularly, excellent sound properties and excellent sound absorption and sound insulation effects can be usefully used as a sound insulation material for noise blocking of apartment houses, as well as simple construction. It relates to a construction method of the polyurethane-based interlayer sound insulation material that can improve.

Recently, with the rapid industrialization, industrial technology is rapidly developing, and the demand for low vibration and low noise is rapidly increasing due to the improvement of living standards and the compaction of buildings, and due to environmental and health problems caused by noise and vibration. Noise standard is regulated by law. According to these requirements, various sound insulation materials, vibration damping materials, vibration damping materials, sound absorbing materials, and sound insulating materials have been developed.

Noise-proofing materials transform asphalt or sound energy into mechanical energy to be absorbed into the material as thermal energy, and asphalt-based compositions and iron sheets have often been used. The magnitude of noise is usually expressed in decibels (dB), which determines the level of noise that must be observed depending on the environment. In case of noise exceeding this, sound absorbing material or sound insulating material should be used to create a pleasant environment and the standards set forth in the regulations must be observed.

Floor impact sound is generated by vibrating floor structures such as floor slabs, ceilings or walls when an impact such as a person walking or falling objects is applied to the upper floor of a multi-family house such as an apartment. The sound generated in this way is transferred to various locations with very little attenuation and perceived as a direct sound emitted by vibrating the surface of the structure.

The floor impact sound, as shown in Figure 1, the impact source 110 that impacts the floor when walking an object or a person, and the floor structure 120 is vibrated by the impact of the impact source to the lower space 130 Will be delivered. The floor impact sound is largely light impact sound that generates a lot of high frequency (1 ~ 2.5KHz) components, such as falling sounds, such as bowls and golf balls, movement of the chair, low frequency (400 ~) such as adult walking, children skipping 800Hz) is divided into heavy impact sound that generates a lot of sound.

The general concrete slab structure that constitutes the floor of a multi-family house is a good sound insulation material because it blocks air propagation sound well.However, when the concrete structure is directly impacted or vibrated, it is converted into a solid radio sound and hardly attenuated. It is transmitted and radiated as noise. Therefore, more effective soundproofing material development and construction methods should be sought.

In particular, in Germany or France, the floor impact sound is mainly a structure for preventing a light impact sound mainly because a lot of impact sounds generated in the process of walking wearing shoes (especially women's high heels). Due to the above characteristics, Germany, France, etc. has adopted a floor floor (flooration floor) structure, which is installed on the slab of a dust-proof shockproof material such as glass wool (Glass Wool) to a certain thickness, and then built a built-in flooring layer thereon This is to prevent the impact energy applied to the slab directly. In order to increase the floor impact noise reduction effect, it is preferable to use a flexible cushioning material having an appropriate loss factor to lower the spring constant or increase the weight of the floating floor structure to lower the natural frequency. However, when the flexible material is too flexible, the flooring (rolling) occurs, the optimization of this is required.

However, in the case of Korean or Japanese houses, unlike most German or French, most people have a sedentary life, so it is desirable to have a structure that can prevent heavy impact sounds such as children's jumping, in addition to lightweight impact sounds. Various sound insulation materials and construction methods are known.

Currently, the floors of apartment buildings such as apartments or villas generally have lightweight foamed concrete layers 220 formed on the wall concrete framework and the concrete slab layer 210 as shown in FIG. After installation, the finishing mortar layer 230 is formed to maintain dust and insulation between the upper and lower layers. Reference numeral 240 denotes a flooring material such as monolium, solid wood, tiles, and the like.

In the above-described concrete slab layer 210 as a structure between the upper and lower floors of a multi-family house, a span (distance between points of a building) is typically 4 to 5 m and a thickness of about 120 to 150 mm. In addition, the lightweight foam concrete layer 220 has a thermal conductivity of about 0.1 to 0.15 ㎉ / mh ° C., and is generally constructed to be resistant to heat and durability, and to an upper load load and a fixed load. It is formed by pouring so that thickness may be 60-80 mm. After forming the light-weight foam concrete layer 220 as described above, the usual heating pipe is installed on the upper end thereof, and then the finishing mortar layer 230 of cement material is poured to a thickness of about 30 to 50 mm thereon to be plastered.

However, the reinforced concrete slab structure as described above is a lightweight foam concrete built on the upper surface of the reinforced concrete slab is responsible for attenuating the noise, but the noise reduction action of the lightweight foam concrete absorbs the noise due to the light impact, weight impact properly · The situation is not blocked, and the flooring material 240 of the synthetic resin system laid on the upper surface of the finishing mortar layer 230 only serves to attenuate the noise level of about 2dB, but does not block the occurrence of further noise and vibration. I have a problem.

Accordingly, as shown in FIG. 3, after the interlayer sound insulation material layer 250 is formed using the sound insulation material on the wall concrete frame and the concrete slab layer 210, the light weight foam concrete layer 220 is formed on the upper end thereof, and the upper end thereof. The construction method for forming the heating pipe and the finishing mortar layer 230 has been disclosed.

The interlayer sound insulation material 250 is to install a sound insulation material obtained by mixing an adhesive binder by finely crushing foam polystyrene foam or waste tire having a thickness of about 20 mm on the top of the concrete slab layer 210.

However, the multi-family house by the construction method can block some noise or vibration about the loss of temperature and impact sound that is transferred to the floor between the upper and lower floors, but the heat is transferred by the wall concrete frame partitioning the interior of the multi-family house. It was not possible to prevent heat loss and impact sound. In addition, there is a need for a sound insulation material that can effectively block light impact sound and heavy impact sound as it does not properly absorb and block noise due to light impact and heavy impact.

Various kinds of flexible materials obtained by mixing and mixing high specific gravity inorganic particles with resin are known (Japanese Patent Office 55-21052, Japanese Patent Office 58-25375, Japanese Patent Application 57-34064, Japanese Patent Application Publication 61-57632). ). The sound insulation material is processed into a sheet shape, and is widely used as a composite material which is attached to floors or walls of automobiles, railway vehicles, buildings, etc., or adheres to steel sheets, nonwoven fabrics, concrete panels, wooden boards, and the like.

However, in the case of using fillers such as inorganic particles as sound insulating materials, if the proper combination with the binder is not made, bulk filling cannot be obtained, and the flexibility of the sound insulating materials cannot be obtained, and the so-called "plate out" phenomenon during molding processing There is such a problem that the finish treatment property of the product surface such as remarkably occurs is lowered.

In addition, when exposed to flame, the molten binder resin cannot maintain a high specific gravity filler and is easily released from the sound insulating material, so that the flame propagates at a high speed. In particular, sound insulation materials known to date have a tendency to cause great casualties in fires because they do not have the property of preventing flame retardancy and flame propagation when exposed to a fire.

Therefore, the present invention is to solve the above-mentioned problems, and can effectively be used as a soundproofing material for noise blocking of apartment houses by effectively blocking light impact sound and heavy impact sound while improving the workability. The purpose of the present invention is to provide a method of constructing a polyurethane-based interlayer sound insulation material which can provide sufficient flame retardancy and prevent fire propagation in case of fire.

The present invention to achieve the above object

In the sound insulation material construction method to reduce the impact sound of the apartment house by forming the interlayer sound insulation material layer on the top of the concrete slab layer and then construct the light-bubble concrete layer and heating piping and finishing mortar layer sequentially,

The interlayer sound insulation layer is formed by coating a polyurethane prepolymer on top of the concrete slab layer to form a primer layer, foaming the polyurethane at room temperature thereon to form a sound absorbing layer, and then coating the hard polyurethane on the top thereof. Provided is a method for constructing a polyurethane-based interlayer sound insulating material, characterized in that by forming a sound insulating layer.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, but the accompanying drawings are provided only to assist in understanding the present invention, but the present invention is not limited thereto.

4 is a floor diagram of a house having a sound insulation material layer formed according to an embodiment of the present invention. As shown in the present invention, the interlayer sound insulation material layer 50 is formed on the concrete slab layer 10 to the top. After coating the polyurethane prepolymer on the top of the concrete slab layer 10 to form a primer layer 51, and by foaming the polyurethane foam at room temperature thereon to form a sound absorbing layer 52, to the top of the high hardness Polyurethane is coated to form the sound insulation layer 53 to form the interlayer sound insulation material layer 50, and then the normal light foam concrete layer 20 and heating piping and finishing mortar layer 30 are sequentially constructed on top thereof. There is a characteristic to doing it. Reference numeral 40 denotes flooring materials such as monolium, solid wood, tiles, and the like.

The primer layer 51 constituting the interlayer sound insulating material layer 50 according to the present invention is formed by coating a polyurethane prepolymer, wherein the polyurethane prepolymer is obtained by reacting an isocyanate compound with a polyol component, and thus, a concrete slab It is used to improve the adhesion between the layer 10 and the upper polyurethane foam.

Polyurethane prepolymer for forming the primer layer 51 may be prepared by a conventional method, but in the present invention Crude MDI (4,4'-Diphenylmethane Diisocyanate) and PPG-400 (Polypropylene Glycol, functional group = 2, molecular weight 400) was used isocyanate prepolymer for primer coating prepared by reacting NCO (%) = 6.5-7.

The isocyanate prepolymer prepared as described above may be added by mixing and stirring ethyl acetate, water absorbent, solvent, and the like, which are usually added, and then mixing DBTDL with 0.05 to 0.2% by weight as a reaction catalyst.

At this time, when the isocyanate prepolymer is coated on the concrete slab, it is preferable to have a thickness of 50 to 100 μm. If the thickness of the coating film is less than 50㎛, the adhesion force to the concrete slab, which is the coating material, decreases, which may cause the phenomenon of lifting in the middle due to the lack of bonding strength between the polyurethane foam attached to the upper layer and the high hardness polyurethane. This is because when the thickness is 100 µm or more, the drying time becomes long and workability becomes poor.

The polyurethane primer coating material is coated with a roller or spray method using a catalyst and cured and dried at room temperature for 30 minutes to 1 hour, and immediately after the polyurethane foam is constructed, a sound absorbing layer 52 is formed. .

According to the present invention, the polyurethane foam constituting the sound-absorbing layer 52 is an isocyanate prepolymer having NCO (%) = 5-7 using TDI-80, PPG-2000, PPG-3000, 1,3-butanediol. After the preparation, it is blended with Polymeric MDI or Modified MDI and adjusted to NCO (%) = 10-30 to make a curing agent.In addition, PPG-4000 is a filler, phosphorus-based flame retardant, antibacterial agent, catalyst, silicone foam stabilizer, water, It can be formed by adding a blowing agent and the like, and mixing the curing agent and the main material to fine-foam in a spray or Pouring Rake Process process at room temperature.

At this time, the foaming is divided into two types according to the manufacturing method of the polyurethane foam, one is the chemical foaming by the CO ₂ generated by the reaction of water and isocyanate, and the other is physical by the use of the foaming agent It is foaming. In the present invention, the foaming alone or by using a physical blowing agent such as environmentally friendly MC (Methylene Chloride), Cyclopentane and the like to achieve the density control and foaming properties of the foam at room temperature.

In order to facilitate the mixing of raw materials in the foaming process and to lower the surface tension of the urethane-based, it helps bubble growth, and to lower the pressure difference between bubbles to prevent the diffusion of gas, and to prevent the urethane cell from growing or becoming uneven. In the present invention, a silicon foaming agent (Silicone Surfactant) was used, and more specifically, Witco L-5420 or Goldschmidt B-8404 was used.

In addition, a filler commonly used to improve the buffer performance, impart an air layer, and convert permeated noise into thermal energy may be added. The filler may include lead powder, lead compound, iron powder, and iron oxide slug. Alkali metal oxides such as silica, Talc, Clay, calcium carbonate, germanium bicarbonate, barite (barium sulfate) or alkaline earth metal oxides may be used.

In addition, catalysts added to promote curing include tertiary amines selected from Dimethylcyclohexylamine (DMCHA), Tetramethylenediamine (TMHDA), Pentametylenediethylene diamine (PMDETA), and Tetraetylenediamine (TEDA), which are widely used in polyurethane foam production. Amine) compound or a metal catalyst selected from Stannous Octoate, Dibutyltindilaurate (DBTDL) can be used, and in the present invention, the metal catalyst was used in an amount of 0.05 to 0.2 wt% based on the total composition.

According to the present invention, in addition to the above-described additives, in order to provide sufficient flame retardancy and to prevent the propagation of fire during a fire, a flame retardant may be further added and foamed in the foaming process.

Flame Retardant is generally divided into halogen-based and phosphorus-based, and can be classified into additive type (non-reactive type) and reactive type, and in the present invention, non-toxic and dehydrogenation and dehydration in fire. An additive-type phosphorus-based flame retardant was used to form a carbonized layer. The additive-type phosphorus-based flame retardant was tris (2,4-dichloropropyl) phosphate, tris (2-chloropropyl) phosphate (aka TCPP) or tris (2- Chloroethyl) phosphate (aka TCEP) may be used.

In addition, during the foaming process, an antimicrobial agent may be added and foamed for the purpose of antibacterial and fungi from the fungus or fungus, and the antimicrobial agent may be phenolic, organotin, organic mercury, triazine, quaternary ammonia salt, or sulfonyl halide. Pyridine, pentane, organic copper, organonitrogen, iodine, silver, chloronaphthalin, dihydroabiethylamine petacphenol, pentacrolaulet, etc. can be used, but in the present invention, it is non-toxic and has excellent antibacterial properties. (1,2-Bezisothiazolin-3-one) was used.

At this time, the polyurethane foam is preferably micro-foamed to a thickness of 10 to 50mm, which is when the thickness of the polyurethane foam is less than 10mm sound absorption is lowered, on the contrary, the thickness of the polyurethane foam exceeds 50mm If the sound absorption is good, but the feeling of anxiety due to the lingering phenomenon, it is because a problem that takes a lot of construction costs. Herein, micro-foaming means that the number of cells per unit area of 10 cm or less, and when the number of cells is 10 or more, the sound absorption is good, but the tensile strength is lowered, and the sound absorption and sound insulation as a composite material with the high hardness polyurethane coating material of the upper layer This is because the effect is reduced.

The polyurethane foam is cured and dried at room temperature for 30 minutes to 1 hour by using a chemical foaming agent alone or a chemical blowing agent and a physical product blowing agent, and immediately after the construction of a high-hardness polyurethane coating material to the sound insulation layer 53 To form.

According to the present invention, the high hardness polyurethane coating material is TDI-80, PPG-400, PPG-280, PPG-3000, the solid content 100%, NCO (%) = 6 to 9 isocyanate prepolymer as a curing agent Separately, a polyether polyol having a functional group of 2 to 3 and a molecular weight of 1000 to 4000 is mixed, and a filler, a phosphorus-based flame retardant, an antibacterial agent, and a catalyst are added thereto as necessary, and the curing agent and the subject are mixed at room temperature. Hardening is performed to form the sound insulation layer 53. At this time, the filler and the phosphorus-based flame retardant, antibacterial agent and catalyst used may be used as mentioned in the above-mentioned polyurethane foam.

Such a high hardness polyurethane coating material refers to the hardness of Shore A 100 or more. If the hardness is low, it is preferable to use high hardness because it cannot withstand the compressive load of the upper layer, and its thickness is coated with 1 to 3 mm. Good to do. When the thickness of the high-hardness polyurethane coating material is less than 1 mm, the structural stability and sound insulation are inferior because it cannot endure the load by the lightweight foam concrete and the finishing mortar placed on the upper layer, and the thickness of the polyurethane coating material is more than 3 mm. If so, the sound insulation is good, but it is difficult to form a uniform surface, bubbles are generated, rather the sound insulation is lowered, there is a problem that the delay of the drying time and the construction cost takes a lot.

The high hardness polyurethane coating material is coated with a trowel or special trash using a catalyst and cured and dried at room temperature for 2 to 3 hours. The layer 20 is formed, and then the usual heating piping and finishing mortar layer 30 is sequentially constructed.

As described above, after coating the polyurethane prepolymer on the upper surface of the concrete slab layer 10 to form a primer layer 51, foaming polyurethane foam at room temperature thereon to form a sound absorbing layer 52, and When forming a sound insulation layer 53 by coating a polyurethane of high hardness to the top to form an interlayer sound insulation material layer 50, the interlayer sound insulation material is excellent in mechanical stability even when constructed to a thickness of about 50mm and to the floor impact sound In addition to the excellent reduction performance, the impact force transmitted from the finishing layer is horizontally distributed while passing through the rigid layer even when a rigid layer having a compressive strength of 80 kgf / cm 2 or more is formed thereon, and is transmitted to the sound insulation layer 53. There is no change in the sum of the impact force per unit area of the sound insulation layer 53 to which the impact force is transmitted is reduced, thereby improving the performance of reducing the impact sound on the floor. In addition, the interlayer sound insulating material according to the present invention has an advantage of excellent flame retardancy and antibacterial properties.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only presented to aid the understanding of the present invention, but the present invention is not limited thereto.

<Production example of coating material for primer treatment>

15 parts by weight of toluene, 40 parts of Crude MDI (4,4'-Diphenylmethane Diisocyanate), and 0.02 parts by weight of reaction catalyst DBTDL (Di- n -butyltindilaurate) were added to a four-necked flask and heated to 57 ± 3 ° C under heating and stirring. Then, 25 parts by weight of PPG-400 (Polypropylene Glycol, functional group = 2, molecular weight 400) was added to 25 parts by weight of toluene and slowly mixed with the solution for 2 hours, and then the reaction temperature was 88 ± 3 ° C over 1 hour. The reaction mixture was heated for 4 hours at the same temperature, and the reaction was terminated to prepare an isocyanate prepolymer (67% solids, 18 colors, NCO (%) = 7).

50 parts by weight of the prepared isocyanate prepolymer, 5 parts by weight of ethyl acetate, 2.5 parts by weight of Additive TI (Bayer Co.) as a water absorbent, 1.5 parts by weight of Anti-Terra-U (BYK-Chemi), Talc After mixing 35 parts by weight, stirring for 30 minutes, dispersing the particle size to 5 or more by NS (North Standard graduations) unit with an Attrition mill, and then adding 0.3K by weight of BYK-066 (BYK-Chemie), BYK 0.5 parts by weight of -410 (BYK-Chemie) and 5 parts by weight of a mixed solvent were added, followed by stirring for 30 minutes to prepare a coating material for primer treatment according to the present invention.

The prepared primer treatment coating material may form a primer coating layer by using a DBTDL, the reaction catalyst during coating, by adding 0.1% by weight to the total composition.

<Production example of isocyanate prepolymer for polyurethane foam production>

30 parts by weight of TDI-80 (Toluene Diisocyanate) and 0.004 parts by weight of DBTDL, a reaction catalyst, phosphoric acid (85%), were added to a four-necked flask and heated to 27 ± 3 ° C. under heating and stirring. Then, PPG-2000 (Polypropylene Glycol, 30 parts by weight of a functional group = 2, molecular weight 2000) and 40 parts by weight of PPG-3000 (polypropylene glycol, functional group = 3, molecular weight 3000) and a mixed solution of 2.5 parts by weight of 1,3-butanediol for 3 hours and then 1 The reaction temperature was raised to 88 ± 3 ° C. over time, and after 4 hours of further reaction at the same temperature, the reaction was terminated to prepare an isocyanate prepolymer (solid content 100%, color 3, NCO (%) = 7). . Polymeric MDI was mixed with the isocyanate prepolymer to prepare an isocyanate prepolymer having NCO (%) = 20 to form a curing agent component of the foamed polyurethane.

Separately, 20 parts by weight of calcium carbonate, 10 parts by weight of Talc, 5 parts by weight of BaSO _{4 and} 5 parts by weight of phosphorus-based flame retardant tris (2,4-dichloropropyl) phosphate in 10 parts by weight of polyether polyol having 3 functional groups and molecular weight of 4000 2 parts by weight of antibacterial agent, 0.1 parts by weight of catalyst DBTDL, 0.3 parts by weight of silicon foam stabilizer, 1.0 parts by weight of water, 2.0 parts by weight of blowing agent, and stirred for 30 minutes, and then the particle size was NS (North) with an Attrition Mill. Disperse to 5 or more units by Standard Graduations, add 0.3 parts by weight of BYK-066 (BYK-Chemie) and 0.5 parts by weight of BYK-410 (BYK-Chemie), and stir for 30 minutes. It was set as.

Mixing the prepared main agent and the curing agent and foaming at room temperature by the spray process can form a polyurethane foam layer as a sound absorbing layer.

<Production example of high hardness polyurethane coating material>

35 parts by weight of TDI-80 (Toluene Diisocyanate) and 0.03 parts by weight of Benzoyl Chloride, a reaction stabilizer, were added to a four-neck flask and heated to 27 ± 3 ° C. under heating and stirring. Then, PPG-400 (Polypropylene Glycol, functional group = 2, Molecular weight 400) 30 parts by weight, PPG-280 (polypropylene glycol, functional group = 3, molecular weight 280) 10 parts by weight, PPG-3000 (polypropylene glycol, functional group = 3, molecular weight 3000) 25 parts by weight of the mixed solution uniformly for 3 hours After the addition of the mucus, the reaction temperature was raised to 88 ± 3 ° C. over 1 hour, followed by further reaction at the same temperature for 4 hours, and then the reaction was terminated to obtain an isocyanate prepolymer (solid content 100%, Gardner 4, NCO (%) =). 9) was prepared, and the isocyanate prepolymer thus prepared was used as a curing agent of a high hardness polyurethane coating material.

Separately, 5 parts by weight of polyether polyol having a functional group of 3 and a molecular weight of 4000 by weight 30 parts by weight of calcium carbonate, 15 parts by weight of Talc, 8 parts by weight of BaSO ₄ and 5 parts by phosphorus-based flame retardant tris (2,4-dichloropropyl) phosphate Add 2 parts by weight of antimicrobial agent BIT, stir for 30 minutes, and disperse the particle size to 5 or more in NS (North Standard Graduations) units with an Attrition Mill, and then add BYK-066 (BYK-Chemie) 0.3 After adding the parts by weight and 0.5 parts by weight of BYK-410 (BYK-Chemie), the mixture was further stirred for 30 minutes to form the main polyurethane.

When mixing the prepared main agent and the hardener, DBTDL is used as a catalyst by mixing 0.1 wt% with respect to the total composition, thereby forming a high-hardness polyurethane layer that is a sound insulating layer.

<Examples 1 to 7>

A concrete structure having a size of 1,000 × 1,000 × 1,000mm was installed, and a soundproof treatment was performed on a rock surface having a thickness of 50mm inside, and the thickness of the concrete slab on the upper portion of the structure was 120 mm.

The primer layer was formed by coating the upper surface of the concrete slab with a thickness of 80 μm using the coating material prepared in <Preparation Example of Primer Treatment>, and then prepared in <Preparation Example of Isocyanate Prepolymer for Polyurethane Foam Manufacturing>. One main ingredient and a curing agent were mixed and foamed at room temperature by a spraying process to form a sound absorbing layer, which is a polyurethane foam having a thickness shown in Table 1 below, on which the main ingredient and the curing agent prepared in <Preparation Example of High Hardness Polyurethane Coating Material> were prepared. After mixing, the coating was formed to form a high hardness polyurethane sound insulation layer of the thickness shown in Table 1 to form an interlayer sound insulation layer.

Lightweight foam concrete with a density of 400Kg / m3 by mixing and foaming with a ribbon mixer for 5 minutes by mixing 9.4kg of Portland cement, 0.04ℓ of foaming agent, and an appropriate amount of water to a top of the interlayer insulation layer, and foaming with a ribbon mixer. A layer was formed.

Sand and cement are mixed at a weight ratio of 1: 3 to the top of the lightweight concrete layer, and the finishing mortar prepared by adding water is poured into a 40 mm thickness and then plastered with a trowel and cured for 28 days to form a finishing mortar layer. A sound room was prepared.

Comparative Example 1

Except not forming an interlayer sound insulating layer was carried out in the same manner as in the above Example to prepare a sound receiving chamber as a test body.

Comparative Example 2

A sound absorbing chamber as a test body was prepared in the same manner as in Example except that the interlayer sound insulating layer was formed of commercially available expanded polystyrene foam (BASF Soundpor).

Experimental Example 1

The density, tensile strength and elongation of the interlayer sound insulation layers of Examples 1 to 7 and Comparative Example 2 were measured according to KSM 3809 and KSM 6518, and the antimicrobial properties, flame retardancy, and residual strain were evaluated as follows, and the results are shown in Table 1 below. Shown in

Antibacterial

The antimicrobial test was carried out using E. coli ( Escherichia coli ATCC 8739) and Pseudomonas aeruginosa ATCC 15442 as a strain and cultured for 24 hours by pressure-adhesive method. Evaluated by calculating the reduction rate of bacteria.

-Flame Retardant-

The flame retardancy was measured according to the flame retardancy method of KSF 2271 building materials and structures, and the evaluation was evaluated as flame retardant class 1, 2, and 3.

-Residual strain-

Residual strain, which indicates the strain remaining after stress was applied to a certain material and then removed, was used after cutting the interlayer sound insulation layer to 600 × 600 mm. As a test apparatus, an iron plate (SS41) having a set weight of 9 kg (loading weight of 100 kg / m 2) as a load plate, three dial gauges with a precision of 0.01 mm as a strain gauge, and a load tester applied by hydraulic pressure were used. Place the test body in the center of the strain tester, load the load plate on it, install the three strain gauges on the diagonal of the load plate, measure the initial value, and use the load tester to test the specimen up to 500㎏f. After 5 minutes of displacement, the displacement was measured twice, and the final residual strain settlement (mm) was measured.

Experimental Example 2

After the microphone was installed at the height 1/2 point inside the sound receiving chamber, the sound insulation performance was measured by generating a light impact sound and a heavy impact sound at the center point of the test body. The light impact sound was generated using a tapping machine (Tapping Machine, Danish B & K Co., Ltd.), and the heavy shock sound was generated by dropping a tire having a weight of 7.6 kg and a pneumatic pressure of 40 psi at a height of 90 cm using a tire automatic fall. The results were measured according to the criteria set by the Japan Institute of Architecture (L grade curve and overall sound pressure level (dB), a single evaluation index). The lower the grade, the better the sound insulation performance.

As shown in Table 1, in Examples 1 to 7 carried out within the preferred range of the present invention, not only the physical properties of the interlayer sound insulation material but also the sound insulation properties of light impact sound and heavy impact sound protection are very excellent.

As described above, the present invention can be effectively used as a soundproofing material for noise blocking of apartment houses by effectively blocking light impact sound and heavy impact sound while having excellent physical properties, and can improve productivity due to a simple manufacturing process and sufficient flame retardancy. It is a useful invention to provide a method of constructing a polyurethane-based interlayer sound insulation material to prevent the propagation of fire in case of fire at the same time.

1 is a schematic diagram showing a generation model of the floor impact sound.

2 is a floor diagram of a house having a sound insulation layer formed in accordance with a conventional construction method.

Figure 3 is a floor diagram of a house formed with a sound insulation layer in accordance with another conventional construction method.

Figure 4 is a floor diagram of a house formed with a sound insulation layer in accordance with an embodiment of the present invention.

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

50: interlayer sound insulation layer

   51: primer layer

   52: sound absorption layer

   53: sound insulation layer

Claims (8)

In the sound insulation material construction method to reduce the impact sound of the apartment house by forming the interlayer sound insulation material layer on the top of the concrete slab layer and then construct the light-bubble concrete layer and heating piping and finishing mortar layer sequentially, The sound insulation layer is formed by coating a polyurethane prepolymer on top of the concrete slab layer to form a primer layer, and foaming the polyurethane at room temperature thereon to form a sound absorbing layer. A method for constructing a polyurethane-based interlayer sound insulating material, characterized in that the layer is formed. The thickness of the said primer layer is 50-100 micrometers, the thickness of a sound absorption layer is 10-50 mm, and the thickness of a sound insulation layer is 1-3 mm, The construction method of the polyurethane interlayer sound insulation material characterized by the above-mentioned. The method according to claim 1 or 2, wherein the primer layer is NCO (%) = 6.5-7 prepared by reacting Crude MDI (4,4'-Diphenylmethane Diisocyanate) and PPG-400 (Polypropylene Glycol, functional group = 2, molecular weight 400) Method for constructing a polyurethane-based interlayer sound insulating material, characterized in that it is prepared using an isocyanate prepolymer. The method according to claim 3, wherein the sound absorbing layer is prepared by using TDI-80, PPG-2000, PPG-3000, 1,3-butanediol to prepare an isocyanate prepolymer having a solid content of 100% and NCO (%) = 5 to 7 Blend Polymeric MDI or Modified MDI to adjust NCO (%) = 10 to 30 to make a curing agent.In addition, PPG-4000 is mixed with a filler, a catalyst, a silicon foam stabilizer, water, and a blowing agent to form a main ingredient. A method of constructing a polyurethane-based interlayer acoustic material, characterized in that it is prepared by fine foaming the curing agent and the main ingredient at room temperature by spraying or a Pouring Rake Process process. The method according to claim 4, wherein the main component for forming the sound absorbing layer further comprises a phosphorus-based flame retardant and an antibacterial agent. The method for constructing a polyurethane-based interlayer acoustic insulation material according to claim 5, wherein the sound-absorbing layer is formed by mixing the main material and the curing agent so as to finely foam the cells so that the number of cells per unit area of 1 cm2 is 10 or less. The sound insulating layer according to claim 6, wherein the sound insulating layer is a hardener of 100% solids obtained using TDI-80, PPG-400, PPG-280, PPG-3000, and NCO (%) = 6 to 9, as a curing agent. Construction of a polyurethane-based interlayer sound insulating material, which is obtained by adding a filler and a catalyst to a polyether polyol having a number of 2 to 3 and a molecular weight of 1000 to 4000, and mixing the curing agent and the main component to cure at room temperature. Way. The method according to claim 7, wherein the main component for forming the sound insulation layer further comprises a phosphorus-based flame retardant and an antibacterial agent.