KR102394242B1 - Sound insulation composition preventing interlayer noise and sound insulation material using the same - Google Patents

Abstract

The present invention relates to a sound insulating material composition with improved sound insulation properties and the long-term retention of the sound insulation properties by comprising a heterogeneous foam resin including foamable polyurethane and a sound insulating material between floors of a building using the same. According to the present invention, noise between floors is effectively suppressed and heat resistance is improved to prevent the deterioration of sound insulation performance in the long term so that the sound insulation properties are retained for a long period of time by compounding and using a material with a low dynamic modulus of elasticity. Therefore, a building floor structure suitable for a lifespan of a building of 40 years or more can be provided.

Description

Sound insulation composition preventing interlayer noise and sound insulation material using the same

The present invention relates to a sound insulating material composition with improved long-term maintenance of sound insulating properties and sound insulating properties including different types of foaming resins, and to a sound insulating material between floors of a building using the same.

Since a large number of people live together in a multi-story building, it is very important to block noise and vibrations between the slabs (upper and lower floors) when constructing a slab floor.

As an impact applied from the upper floor, specifically, when an impact from a person's walking, dropping an object, or especially a severe shaking of children is applied to the lower floor, the floor structure such as a floor slab, ceiling, or wall vibrates to generate a floor impact sound. The generated sound is transmitted to various locations and vibrates the surface of the structure, causing severe damage to the occupants of the lower floor, just like air sound emitted directly.

Therefore, the installation of a cushioning material for shock absorption and a sound insulation material for dissipating noise is essential in the construction of the floor of a building.

Currently, the standard structure of apartment houses is formed by stacking cushioning materials, lightweight aerated concrete, finishing mortar, and floor finishing materials on the molded concrete slab in the order.

As a cushioning material to reduce inter-floor noise generated in multi-story houses such as apartments, the conventional "EVA pad" made from a foam composition made of EVA (Ethylene Vinyl Acetate) as a main material and LDPE (Low Density Polyethylene) as an auxiliary material is used. became Unexamined Patent Publication No. 10-2003-0078135 discloses an example of a composition using EVA.

However, there is a problem in that the sound insulation material between floors of a conventional building is not effective in absorbing noise and vibration generated between floors, and thus cannot effectively block noise and vibration applied from the upper floor.

In addition, as buildings age, there is a problem in that noise between floors increases more and more.

In order to solve the above problems and satisfy the various characteristics required for the sound insulating material between floors, the present invention improves sound insulation properties that reduce noise between floors of a building and also improves heat resistance, so that the sound insulation performance is suitable for the lifespan of buildings of 40 years or more. An object of the present invention is to provide a sound insulation composition and a structure for a floor structure for construction.

In order to solve the above problems, the present invention includes 10 to 90% by volume of pre-expanded polymeric resin foam granules or polymer resin and 10 to 90% by volume of pre-expanded expandable thermoplastic polyurethane foam, the pre-foamed expandable thermoplastic The polyurethane foam granules have a size of 4 to 13 mm, a density of 80 to 350 kg/m 3 , and a melting point of 80 to 180°C.

In addition, there is provided an interlayer sound insulating material formed by molding the sound insulating material composition.

According to the present invention, by compounding and using a material with a low dynamic modulus of elasticity, noise between floors is effectively suppressed and heat resistance is improved to prevent deterioration of sound insulation performance in the long term, so that sound insulation is maintained for a long period of time, so the lifespan of a building of 40 years or more It becomes possible to provide a floor structure suitable for construction.

In addition, even when installing at the building construction site, flattening is possible at the same time as construction and the flatness is high, so the uniformity of the sound insulation effect is improved, and the waste of lightweight aerated concrete and mortar for floor flattening is reduced to improve the convenience of construction. can

1 is a conceptual diagram illustrating a structure of an interlayer sound insulating material molded using a sound insulating material composition according to an embodiment of the present invention.

The present invention comprises 10 to 90 vol% of pre-expanded polymer resin foam granules or polymer resin and 10 to 90 vol % of pre-expanded expandable thermoplastic polyurethane foam granules, wherein the pre-expanded expandable thermoplastic polyurethane foam granules have a size It relates to a sound insulating material composition, characterized in that it has a value of 4 to 13 mm, a density of 80 to 350 kg/m3, and a melting point of 80 to 180°C, and a sound insulating material between floors of a building using the same.

Since the sound insulation material between floors of a building using the sound insulation composition of the present invention is porous, it forms an air layer to suppress transmission of impact sound or other noise, and uses a composite material containing other materials other than polyurethane to reduce not only light impact sound but also heavy impact sound there is.

The pre-expanded polymer resin foam granules and the polymer resin material constituting the polymer resin include expandable polystyrene (EPS), expandable polyethylene (EPE), expandable polypropylene (EPP), XPS (extrusion expanded polystyrene chips) and ethylene. At least one selected from vinyl acetate (EVA).

At this time, EPS, EPE, and EPP are materials capable of foaming by containing a foaming agent.

Extrusion expanded polystyrene (XPS) is a product molded into a foam by mixing a foaming agent with a raw material of polystyrene melted at high pressure.

The pre-foamed polymer resin foam granules may be prepared by pre-foaming a foamable polymer prepared by a bead method or an extrusion method.

By using the pre-foamed polymer resin foam granules, it is easy to control the expansion ratio for molding the sound insulation material, which is the final product, and it is possible to prevent the destruction of the foaming cells that occur in the process of foaming the foamable resin at once. good.

Foams made from pre-expanded expandable thermoplastic polyurethane foam granules have excellent damping properties and breathability.

In this case, the thermoplastic polyurethane is prepared by reacting an isocyanate with a polyol, and the isocyanate is preferably prepared by including at least one monomer represented by the following Chemical Formulas 1 to 2.

[Formula 1]

[Formula 2]

When the pre-foamed expandable thermoplastic polyurethane foam particles are less than 10% by volume, the sound insulation performance for preventing interlayer noise does not appear sufficiently, and when it exceeds 90% by volume, the density increases and the workability deteriorates.

If the size of the pre-expanded expandable thermoplastic polyurethane foam granules is less than 4 mm, the size is similar but mixing with other materials with different densities is not uniform, so that a fusion defect occurs during molding, and if it exceeds 13 mm, it is a size with other materials Due to the excessive difference in , it is difficult to form a dense sound insulating material structure, and poor fusion may occur during molding.

The pre-expanded expandable thermoplastic polyurethane foam granules have a low resistance to deformation when the density is less than 80 kg/m3, so that dimensional changes occur in the heat resistance test. can lower

If the melting point of the pre-expanded expandable thermoplastic polyurethane foam granules is less than 80°C, it is difficult to maintain the shape of the foamed granules when molding, and deformation may occur in the heat resistance test. It may require a process, which may reduce the ease of manufacture and increase the risk of the process.

The sound insulation composition of the present invention contains 0.1 to 8 parts by weight of an antioxidant, 10 to 30 parts by weight of calcium carbonate, and 10 to 30 parts by weight of zinc oxide based on 100 parts by weight of the pre-foamed polymer resin foam granules or polymer resin, and 100 parts by weight of the pre-expanded expandable thermoplastic polyurethane foam particles. 0.5 to 3 parts by weight and 1 to 3 parts by weight of zinc stearate may be further added.

The antioxidant is good because the antioxidant penetrates into the surface of the molten foamed granules during steam molding to improve heat resistance when the antioxidant includes at least one of the compounds represented by the following Chemical Formulas 3 to 11.

[Formula 3]

[Formula 4]

[Formula 5]

[Formula 6]

R is an alkyl group having 1 to 12 carbon atoms.

[Formula 7]

[Formula 8]

[Formula 9]

[Formula 10]

[Formula 11]

The calcium carbonate functions as a filler to improve dimensional stability and prevent sticking to the mold. If it is smaller than the scope of the present invention, the dimensional stability effect is not sufficiently expressed, and if it is large, it interferes with the fusion between the foamed grains during molding. sex may be reduced.

If the zinc oxide is smaller than the scope of the present invention, foaming may be delayed or normal foaming may not be achieved.

If the zinc stearate is smaller than the scope of the present invention, it is easy to stick when mixing and adhesion phenomenon occurs during roll operation on the foam, thereby reducing workability. there is.

The sound insulating material composition may further include 10 to 30 parts by weight of the binder resin relative to 100 parts by weight of the pre-foamed polymer resin foam granules or polymer resin, and the pre-foamed expandable thermoplastic polyurethane foam particles.

The binder resin is for binding the foamed granules or polymer resin, and any commonly used binder may be used.

At this time, if the binder resin is less than 10 parts by weight, the bonding force between the foamed granules and the polymer resin is lowered and cracks and deformations are likely to occur during laying and molding. Elasticity may decrease.

The interlayer sound insulating material of the present invention is made by molding the sound insulating material composition as described above, and thus the sound insulating property is maintained for a long time by preventing the deterioration of the sound insulating performance in the long term. becomes

In this case, the molding may be performed by foaming the sound insulating material composition in a mold using a conventional method.

In addition, the molding may include the steps of installing, planarizing, and curing the sound insulating material composition.

Since the sound insulating material composition according to the present invention has fluidity, the cushioning material layer is formed by flattening the upper surface of the interlayer slab by laying it at a predetermined thickness, and even if there are irregular protrusions on the upper surface of the interlayer slab, the upper surface is made flat. can be installed.

Even if the sound insulation composition of the present invention is installed at a building construction site, flattening is possible at the same time as construction and the flatness is increased, so the uniformity of the sound insulation effect is improved and the waste of lightweight aerated concrete and mortar for floor flattening is reduced. Convenience can be improved.

Hereinafter, the present invention will be described in more detail through Examples and Comparative Examples.

These Examples and Comparative Examples are only for describing the present invention in more detail, and it is for those of ordinary skill in the art that the subject matter of the present invention is not limited by these Examples according to the gist of the present invention. it will be self explanatory

[Examples 1-21]

Pre-foamed polymer resin foam granules, polymer resin, pre-foamed expandable thermoplastic polyurethane foam granules, additives, and urethane-based binder, methylene diisocyanate, were prepared in an amount as shown in Tables 1 to 4 below.

The sound insulating material composition prepared in this way was put into the mold, and pressurized with a steam pressure of 3 bar, but one side of the two sides of the mold was pressurized at 0.5 bar gauge pressure for 14 seconds and then pressurized at 0.6 bar gauge pressure on the second side for 6 seconds to form an interlayer sound insulating material. molded.

[Examples 22 to 24]

Pre-foamed polymer resin foam granules, polymer resin, pre-foamed expandable thermoplastic polyurethane foam granules, additives, and urethane-based binder, methylene diisocyanate, were prepared in an amount as shown in Tables 1 to 4 below.

The sound insulating material composition prepared in this way was put into a mold, and pressurized with a steam pressure of 6 bar, but one side of the two sides of the mold was pressurized at 0.5 bar gauge pressure for 20 seconds and then pressurized at 0.6 bar gauge pressure on the second side for 8 seconds to form an interlayer sound insulating material. molded.

[Example 25]

Pre-foamed polymer resin foam granules, polymer resin, pre-foamed expandable thermoplastic polyurethane foam granules, additives, and urethane-based binder, methylene diisocyanate, were prepared in an amount as shown in Table 4 below to prepare a sound insulating material composition.

The thus-prepared sound insulating material composition was laid, flattened so that the top surface was aligned, and cured for 48 hours to form a laid-type interlayer sound insulating material.

[Comparative Examples 1 to 18]

Pre-foamed polymer resin foam granules, polymer resin, pre-foamed expandable thermoplastic polyurethane foam granules, additives, and urethane-based binder, methylene diisocyanate, were prepared in an amount as shown in Tables 5 to 7 below.

The sound insulating material composition prepared in this way was put into the mold, and pressurized with a steam pressure of 3 bar, but one side of the two sides of the mold was pressurized at 0.5 bar gauge pressure for 14 seconds and then pressurized at 0.6 bar gauge pressure on the second side for 6 seconds to form an interlayer sound insulating material. molded.

In this case, EPS was pre-expanded with a particle size of 1 mm and a polystyrene content of 93 wt%, 40 times pre-expanded, and a density of 30 kg/m 3 was used.

As EVA, a size of 7 mm obtained by chopping EVA foam having a density of 50 kg/m 3 with a VA content of 25% was used.

EPE and EPP were used as pre-expanded granules, each having a density of 50 kg/m 3 and a size of 7 mm.

As the ETPU, those shown in Table 1 below were used.

Calcium carbonate with a particle size of 5 μm was used, the antioxidant of Formula 3 was used, and Methylene diisocyanate, a urethane-based binder, was used as the binder.

Furtherance Example One 2 3 4 5 6 ETPU 85 50 15 50 50 50 EPS 15 50 85 - - - EVA - - - 50 - - EPE - - - - 50 - EPP - - - - - 50 Sum 100 100 100 100 100 100 The following components are added in parts by weight based on 100 parts by weight of the total component. calcium carbonate - 10 - - - - zinc oxide - 0.5 - - - - antioxidant - 0.1 - - - - Zinc Stearate - One - - - - bookbinder - - - - - - note ETPU : Density 200 kg/㎥, size 7 mm, melting point 80℃

Furtherance Example 7 8 9 10 11 12 ETPU 85 50 15 85 50 15 EPS 15 50 85 15 50 85 EVA - - - - - - EPE - - - - - - EPP - - - - - - Sum 100 100 100 100 100 100 The following components are added in parts by weight based on 100 parts by weight of the total component. calcium carbonate - 20 - - 30 - zinc oxide - 1.5 - - 3 - antioxidant - 4 - - 8 - Zinc Stearate - 2 - - 3 - bookbinder - - - - - - note ETPU: Density 100 kg/㎥, size 7 mm, melting point 80℃ ETPU : Density 300 kg/㎥, size 7 mm, melting point 80℃

Furtherance Example 13 14 15 16 17 18 ETPU 85 50 15 85 50 15 EPS 15 50 85 15 50 85 EVA - - - - - - EPE - - - - - - EPP - - - - - - Sum 100 100 100 100 100 100 The following components are added in parts by weight based on 100 parts by weight of the total component. calcium carbonate - 20 - - 20 - zinc oxide - 1.5 - - 1.5 - antioxidant - 4 - - 4 - Zinc Stearate - 2 - - - - bookbinder - - - - - - note ETPU: Density 200 kg/㎥, size 4 mm, melting point 80℃ ETPU: Density 200 kg/㎥, size 13 mm, melting point 80℃

Furtherance Example 19 20 21 22 23 24 25 ETPU 85 50 15 85 50 15 50 EPS 15 50 85 15 50 85 50 EVA - - - - - - - EPE - - - - - - - EPP - - - - - - - Sum 100 100 100 100 100 100 100 The following components are added in parts by weight based on 100 parts by weight of the total component. calcium carbonate 10 20 30 20 20 - 20 zinc oxide 1.5 0.5 1.5 1.5 - 1.5 antioxidant - 0.1 4 4 - 4 Zinc Stearate - 3 2 2 - 2 bookbinder - 20 25 20 - 20 note ETPU : Density 200 kg/㎥, size 7 mm, melting point 80℃ ETPU: Density 200 kg/㎥, size 7 mm, melting point 150℃

*In Example 25, the composition of Example 23 was used for the installation type interlayer sound insulating material.

Furtherance comparative example One 2 3 4 5 6 ETPU - 100 - - - 95 EPS 100 - - - - 5 EVA - - 100 - - - EPE - - - 100 - - EPP - - - - 100 - Sum 100 100 100 100 100 100 note ETPU: Density 200 kg/㎥, size 7 mm, melting point 150℃

Furtherance comparative example 7 8 9 10 11 12 ETPU 5 50 50 50 50 15 EPS 95 50 50 50 50 85 EVA - - - - - - EPE - - - - - - EPP - - - - - - Sum 100 100 100 100 100 100 note ETPU -
Comparative Example 7: Density 200 kg/㎥, size 7 mm, melting point 150° C.
Comparative Example 8: Density 70 kg/㎥, size 7 mm, melting point 80° C.
Comparative Example 9: Density 400 kg/㎥, size 7 mm, melting point 80° C.
Comparative Example 10: Density 200 kg/㎥, size 2 mm, melting point 80° C.
Comparative Example 11: Density 200 kg/㎥, size 20 mm, melting point 80° C.
Comparative Example 12: Density 200 kg/㎥, size 7 mm, melting point 200° C.

Furtherance comparative example 13 14 15 16 17 18 ETPU 50 50 50 50 50 50 EPS 50 50 50 50 50 50 EVA - - - - - - EPE - - - - - - EPP - - - - - - Sum 100 100 100 100 100 100 The following components are added in parts by weight based on 100 parts by weight of the total component. calcium carbonate 40 20 20 20 20 40 zinc oxide 1.5 5 1.5 1.5 1.5 1.5 antioxidant 4 4 15 4 4 4 Zinc Stearate 2 2 2 5 2 2 bookbinder 10 10 10 10 35 35 note ETPU : Density 200 kg/㎥, size 7 mm, melting point 80℃

The sound insulating materials of Examples and Comparative Examples were evaluated for their characteristics using the following evaluation method, and the results are shown in Tables 8 and 9 below.

<Evaluation method>

1. Dynamic modulus

In accordance with the KS F 2868 method, the dynamic modulus of elasticity is measured using an interlayer sound insulating material specimen (size: 200 x 200 x 20 mm).

2. Rate of change of the coefficient of dynamic elasticity

After the specimen is subjected to a heat resistance test at 70° C. for 48 hours, the dynamic modulus of elasticity is measured immediately after the test, after 5 minutes, and after 10 minutes, respectively, according to the elapsed time at room temperature.

Dynamic modulus change rate = (dynamic modulus of elasticity after heat resistance test - basic dynamic modulus) x 100 / basic dynamic modulus of elasticity

When the rate of change of the dynamic elastic modulus is ±20%, it is judged as pass.

3. Dimensional change rate

In accordance with the KS M ISO 2796 method, the thickness of the interlayer sound insulating material specimen (size: 100 x 100 x 25 mm) was measured at 5 locations, and then the specimen was used for a heat resistance test at 70 ° C. for 48 hours. After the lapse of minutes, measure the thickness at 5 locations to measure the thickness change.

Dimensional change rate = (thickness after heat resistance test - thickness of foundation) x 100 / thickness of foundation

When the dimensional change rate is ±5%, it is judged as pass.

4. Formability

When molding, check the mold release characteristics and the fusion properties of the sound insulating material.

At this time, the releasability is judged by the operator, and the fusion property is considered to be pass when the fracture rate of the foamed grains at the fracture surface is 80% or more by bending and breaking the specimen of 100 x 100 x 25 mm.

division dynamic modulus dimensional change rate formability Early rate of change atypia fusion Example 1 2.5 (Pass) 1 (Pass) pass pass pass Example 2 2.7 (Pass) 7 (Pass) pass pass pass Example 3 3.7 (Pass) 12 (Pass) pass pass pass Example 4 3.2 (Pass) 8 (Pass) pass pass pass Example 5 3.2 (Pass) 4 (Pass) pass pass pass Example 6 3.3 (Pass) 3 (Pass) pass pass pass Example 7 2.5 (Pass) 2 (Pass) pass pass pass Example 8 3.6 (Pass) 5 (Pass) pass pass pass Example 9 3.5 (Pass) 13 (Pass) pass pass pass Example 10 2.9 (Pass) 1 (Pass) pass pass pass Example 11 3.8 (Pass) 4 (Pass) pass pass pass Example 12 3.9 (Pass) 12 (Pass) pass pass pass Example 13 2.8 (Pass) 3 (Pass) pass pass pass Example 14 3.7 (Pass) 6 (Pass) pass pass pass Example 15 3.8 (Pass) 15 (Pass) pass pass pass Example 16 2.6 (Pass) 3 (Pass) pass pass pass Example 17 2.7 (Pass) 9 (Pass) pass pass pass Example 18 3.7 (Pass) 15 (Pass) pass pass pass Example 19 2.7 (Pass) 2 (Pass) pass pass pass Example 20 3.3 (Pass) 8 (Pass) pass pass pass Example 21 3.9 (Pass) 11 (Pass) pass pass pass Example 22 3.1 (Pass) 5 (Pass) pass pass pass Example 23 3.7 (Pass) 10 (Pass) pass pass pass Example 24 3.7 (Pass) 13 (Pass) pass pass pass Example 25 3.8 (Pass) 11 (Pass) pass in the form of laying
No release required pass

division dynamic modulus dimensional change rate formability Early rate of change atypia fusion Comparative Example 1 8.4 25 (failed) fail pass pass Comparative Example 2 2.2 0.5 (Pass) pass pass fail Comparative Example 3 6.0 24 (rejected) fail pass pass Comparative Example 4 4.1 15 (Pass) pass pass pass Comparative Example 5 4.0 10 (Pass) pass pass pass Comparative Example 6 3.0 3 (Pass) pass pass fail Comparative Example 7 6.5 20 (rejected) fail pass pass Comparative Example 8 3.1 8 (Pass) fail pass fail Comparative Example 9 4.0 10 (Pass) pass pass pass Comparative Example 10 2.8 5 (Pass) fail pass fail Comparative Example 11 2.6 15 (Pass) pass pass fail Comparative Example 12 - - - - - Comparative Example 13 4.2 9 (Pass) pass pass fail Comparative Example 14 4.0 8 (Pass) pass pass pass Comparative Example 15 3.7 2 (Pass) pass pass fail Comparative Example 16 3.8 8 (Pass) pass pass fail Comparative Example 17 4.1 15 (Pass) pass fail pass Comparative Example 18 4.4 13 (Pass) pass fail pass * Comparative Example 12 cannot be molded

From the results in Tables 8 and 9, it is confirmed that the sound insulating material prepared by mixing a specific ETPU according to the present invention and a different type of resin exhibits excellent sound insulating performance due to a low dynamic modulus of elasticity.

In addition, it is confirmed that the rate of change of the dynamic modulus and the rate of dimensional change by the heat resistance test is small, so that the sound insulation performance is maintained even after long-term use.

In addition, it is also confirmed that the molding operation becomes easy due to excellent mold releasability and fusion properties of the molded product during molding.

Claims (10)

Pre-expanded polymeric resin foam granules or polymer resin 10 to 90% by volume and pre-expanded expandable thermoplastic polyurethane foam containing 10 to 90% by volume, wherein the pre-expanded expandable thermoplastic polyurethane foam has a size of 4 to 13 mm, a density of 80 to 350 kg/m 3 , and a melting point of 80 to 180°C. The method of claim 1,
The sound insulating material composition, characterized in that the pre-foamed polymer resin foam granules and the polymer resin constituting the polymer resin are at least one selected from expandable polystyrene, expandable polyethylene, expandable polypropylene, XPS, and ethylene vinyl acetate. The method of claim 1,
The sound insulation composition further comprises at least one additive selected from antioxidants, calcium carbonate, zinc oxide, and zinc stearate. The method of claim 1,
The sound insulating material composition, the sound insulating material composition, characterized in that it further comprises 10 to 30 parts by weight of the binder resin relative to 100 parts by weight of the pre-foamed polymer resin foam granules or polymer resin, and the pre-expanded expandable thermoplastic polyurethane foam. The method of claim 1,
The polyurethane constituting the pre-foamed expandable thermoplastic polyurethane foam granules is a sound insulating material composition, characterized in that it is prepared by including one or more monomers represented by the following Chemical Formulas 1 to 2.
[Formula 1]

[Formula 2]

4. The method of claim 3,
The antioxidant is a sound insulating material composition comprising at least one of the compounds represented by the following Chemical Formulas 3 to 11.
[Formula 3]

[Formula 4]

[Formula 5]

[Formula 6]

R is an alkyl group having 1 to 12 carbon atoms.
[Formula 7]

[Formula 8]

[Formula 9]

[Formula 10]

[Formula 11]

4. The method of claim 3,
The sound insulation composition comprises 0.1 to 8 parts by weight of an antioxidant, 10 to 30 parts by weight of calcium carbonate, 0.5 to 0.5 parts by weight of an antioxidant, based on 100 parts by weight of the pre-foamed polymer resin foam granules or polymer resin, and 100 parts by weight of the pre-foamed expandable thermoplastic polyurethane foam particles. A sound insulation composition comprising 3 parts by weight and 1 to 3 parts by weight of zinc stearate. An interlayer sound insulating material formed by molding the sound insulating material composition according to any one of claims 1 to 7. 9. The method of claim 8,
The molding is an interlayer sound insulation material, characterized in that the sound insulation composition is foamed in a mold. 9. The method of claim 8,
The molding is an interlayer sound insulating material, characterized in that it comprises the steps of installing, planarizing, and curing the sound insulating material composition.

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