WO2008078856A2 - Damping composition for reducing of light and heavy impact sound through between stories and a method of preparation thereof - Google Patents
Damping composition for reducing of light and heavy impact sound through between stories and a method of preparation thereof Download PDFInfo
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- WO2008078856A2 WO2008078856A2 PCT/KR2007/000917 KR2007000917W WO2008078856A2 WO 2008078856 A2 WO2008078856 A2 WO 2008078856A2 KR 2007000917 W KR2007000917 W KR 2007000917W WO 2008078856 A2 WO2008078856 A2 WO 2008078856A2
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- weight
- asphalt
- damping
- rubber
- damping composition
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- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 238000013016 damping Methods 0.000 title claims abstract description 85
- 230000001603 reducing effect Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 239000010426 asphalt Substances 0.000 claims abstract description 40
- 239000011256 inorganic filler Substances 0.000 claims abstract description 19
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 19
- 239000012188 paraffin wax Substances 0.000 claims abstract description 19
- 229920003051 synthetic elastomer Polymers 0.000 claims abstract description 19
- 239000005061 synthetic rubber Substances 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 18
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims description 33
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000005060 rubber Substances 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- -1 chloro sulfonyl Chemical group 0.000 claims description 5
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920003049 isoprene rubber Polymers 0.000 claims description 4
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 4
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 3
- 229920005549 butyl rubber Polymers 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000002480 mineral oil Substances 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 30
- 239000004567 concrete Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000012858 resilient material Substances 0.000 description 2
- 239000003190 viscoelastic substance Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 239000011387 rubberized asphalt concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Floor Finish (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Disclosed are the composition of a damping material used for reducing light-weight and heavy-weight impact sounds of floor structure in a building simultaneously, and a method of preparation thereof, particularly the composition of the damping material comprises 50 to 80% by weight of asphalt, 5 to 40% by weight of synthetic rubber, 0.5 to 15% by weight of an inorganic filler, 3 to 20% by weight of processing oil, 1 to 10% by weight of paraffin-based oil, and 0.01 to 1.0% by weight of anti-foaming agent and a method of preparation thereof.
Description
Description
DAMPING COMPOSITION FOR REDUCING OF LIGHT
AND HEAVY IMPACT SOUND THROUGH BETWEEN STORIES AND A METHOD OF PREPARATION
THEREOF Technical Field
[1] The present invention relates to a damping composition for reducing light-weight and heavy-weight impact sounds, and more particularly to the composition of a damping material for reducing light-weight and heavy-weight impact sounds generated from floors in multi-story buildings. Background Art
[2] Conventionally, the floor structure in apartment houses contains a layer consisting of autoclaved light-weight concrete and heating pipes. This layer rests upon a slab layer, i.e., in general, a concrete structure, and it is covered with a finishing layer of mortar. The finishing layer is generally covered with an exterior material, such as marble or a laminated paper.
[3] In a community of dwellings, such as an apartment house, since many families dwell in spaces divided by walls or floors disposed in all directions in a single building, it is impossible to effectively insulate the spaces from external and internal noise sources.
[4] Noise transmission from an above unit to a lower unit or between adjacent units is a serious issue which causes disputes between neighboring families. The autoclaved concrete poured around the pipes and the resilient material placed on top of the concrete form a layer which helps reduce the transmission of sounds such as voices, TV, and music to a satisfactory degree. However, neither the autoclave light-weight concrete layer nor the resilient material reduces the transmission of light-weight impact sounds, generated by a person walking on the floor or the sound of furniture being moved. Nor do they effectively reduce heavy-weight impact sounds, such as that generated by running or jumping children.
[5] Therefore, in order to prevent noise between layers, a method for forming a floor by stacking a separate sound insulation sheet thereon has been used. The sound insulation sheets are made of composites having excellent damping and sound insulation characteristics, and include a polyurethane sheet, an asphalt sheet, and so one. Further, other
various sound insulation sheets have been developed. [6] However, this sound insulation sheet effectively reduces light-weight impact noise, but it does not satisfactorily reduce heavy-weight impact noise.
Disclosure of Invention
Technical Problem [7] Therefore, in view of the above mentioned problem, it is an object of the present invention to provide damping for floor structures in a building, which achieves sound insulation and damping effects between layers, and a method of preparation thereof.
Technical Solution [8] The present invention provides a damping composition for reducing light-weight and heavy-weight impact sounds of floor structures in a building, comprising: [9] 50 to 80% by weight of asphalt,
[10] 5 to 40% by weight of synthetic rubber,
[11] 0.5 to 15% by weight of inorganic filler,
[12] 3 to 20% by weight of processing oil,
[13] 1 to 10% by weight of paraffin-based oil, and
[14] 0.01 to 1.0% by weight of anti-foaming agent.
[15] The present invention also provides a method of preparing a damping composition for reducing light-weight and heavy-weight impact sounds of floor structures in a building comprising the following steps of:
[16] heating asphalt at a temperature of 100 to 2500C to prepare melted asphalt,
[17] adding synthetic rubber, processing oil, and paraffin-based oil into the melted asphalt to prepare a mixture and [18] aάfing inorganic filler and anti-foaming agent into the obtained mixture.
Advantageous Effects [19] The damping composition of the present invention when used in a floor structure as described above can reduce light-weight and heavy-weight impact sounds generated between layers, particularly light-weight impact sounds as well as heavy-weight impact sounds which were scarcely damped, simultaneously.
Brief Description of the Drawings [20] The features and other advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, in which: [21] HG. 1 is a graph illustrating changes of dynamic stiffness and loss factor of
specimens manufactured by examples 1 to 4 in terms of frequency:
[22] FIG. 2 is a graph illustrating changes of bending stiffness and loss factor of a structure in terms of frequency in case that only a concrete beam is used: and
[23] FIG. 3 is a graph illustrating changes of bending stiffness and loss factor of a structure in terms of frequency in case that a damping material is inserted into a concrete beam. Best Mode for Carrying Out the Invention
[24] The composition of the present invention for reducing floor impact sound in a building in accordance with the present invention damps impact sounds generated between layers, particularly light-weight impact sounds and heavy-weight impact sounds, which were scarcely damped, thus achieving sound insulating and damping effects between layers.
[25] It is essential that the composition of the present invention for reducing floor impact has physical characteristics for reducing vibration so as to reduce noise generated from vibration caused by impact in a community of dwellings. These characteristics are closely related to the loss factor due to the composition of the present invention. That is, in case that the damping material with a low loss factor is applied to a floor structure in a building, the damping material reduces high resonance caused by modal parameters of concrete, thus effectively insulating the floor structure from impact vibration, such as heavy-weight impact sounds.
[26] However, the loss factor is highly influenced by components and contents of the composition of the present invention. In order to manufacture the present invention having excellent damping characteristics, components and contents of the present invention should be first controlled. Further, the contents of the components affect constructability as well as damping characteristics of the present invention.
[27] Accordingly, the composition of the present invention is comprised of asphalt, synthetic rubber, inorganic filler, processing oil, and paraffin-based oil, and anti- forming agents in controlled amounts.
[28] More specifically, in accordance with the present invention, the asphalt used in the composition of the present invention is damp proof, has high viscosity and thermal sensitivity, and excellent adhesive properties, plasticity, water-resistance, and electrical insulating property. Particularly, the asphalt serves to reduce shear deformation of the floor structure when vibration in the floor structure is generated.
[29] In the present invention, asphalts of many kinds, which are well known in this field, may be used, and kinds of the asphalt are not limited thereto. Of the asphalt it is
preferred to use those which has a penetration index of 60 to 100 on the basis of the standard penetration index at a temperature of 250C and a softening point of 40 to 60 0C. When the penetration index of asphalt is less than the above range or the softening point of asphalt exceeds the above range, energy consumption in the manufacturing process of the product is increased and thus workability is lowered. On the other hand, when the penetration index of asphalt exceeds the above range or the softening point of asphalt is less than the above range, asphalt cannot have thermal resistance, and thus destructs the shape of the product due to flowing and contaminates an opponent element.
[30] Preferably, straight asphalt, blown asphalt, semi-blown asphalt, and a mixture thereof is used. More preferably, a mixture of at least two kinds of asphalt having different penetration indexes is used.
[31] The content of the asphalt in the composition of the present invention is 50 to 80% by weight, preferably, 60 to 75% by weight. When the content of the asphalt is less than the above range, the damping characteristics of damping composition are lowered as a damping material. On the contrary, when the content of the asphalt exceeds the above range, the flowability of the present invention is lowered and thus it is difficult to uniformly mix with other components.
[32] Synthetic rubber has high impact absorption, and thus serves to reduce the impact energy of floor impact sound. In the present invention, it may be used many materials that are well known in this filed as a synthetic rubber. Typically, synthetic rubber uses one selected from the group consisting of nitrile-butadiene rubber (NBR), isoprene rubber (IR), styrene-butadene rubber (SBR), styrene-butadiene-styrene (SBS) rubber, styreneisoprene-styrene (SB) rubber, chloroprene rubber (CR), isobutylene isoprene rubber (HR), acrylate-chloroethyl vinylether monomer (ACM), chloro sulfonyl polyethylene (CSM), and a mixture thereof. Preferably, the synthetic rubber uses SBR, IIR, or their compounds, but not limited thereto. The synthetic rubber, which is mixed with the asphalt, maintains more stable and stronger bonds, thus facilitating the application of the damping material to the floor structure.
[33] The content of the synthetic rubber in the damping composition is 5 to 40% by weight, preferably 10 to 30% by weight. When the content is less than the above range, the damping characteristics of the damping composition are reduced as a damping material. Conversely, when the content exceeds the above range, the flowability of the present invention deteriorates and thus it is difficult to uniformly mix with other components.
[34] The inorganic filler serves as a filling and reinforcing agent, and has a particle size of 0.01 μm to 10.0 mm, preferably 0.01 to lO.Ojrøn, and more preferably 0.03 to 0.5jum so as to be easily mixed with the other components. When the particle size of the inorganic filler is less than or exceeds the above range, the inorganic filler cannot be uniformly mixed with other components due to cohesion and separation of particles of the inorganic filler, and thus the damping characteristics and other mechanical characteristics of the damping composition are lowered. Accordingly, the particle size of the inorganic filler is properly selected from the above range. Further, the inorganic filler has a particle shape of a powder type, a grain type, a spherical type, a flake type, or a structure with hollow core.
[35] In the present invention, it may be used many materials that are well known in this filed as an inorganic filler. Preferably, the inorganic filler is one of the following materials: talc, clay, calcium carbonate, silica, mica, and a mixture thereof and preferably uses calcium carbonate, but not limited thereto.
[36] The content of the inorganic filler in the damping composition is 0.5 to 15% by weight, preferably, 1 to 10% by weight. When the content is less than the above range, the workability of the damping composition is lowered. Conversely, when the content exceeds the above range, the damping characteristics and adhesion properties of the present material are reduced. Accordingly, it is preferable that the content of the inorganic filler is properly selected from the above range.
[37] In addition, the composition of the present invention includes processing oil which can facilitate the construction of a wet process and uniformly mix with other components. In the present invention, the processing oil includes well-known materials which are conventionally used in this art. Preferably, the processing oil includes 5 to 25% of aromatic hydrocarbon, 35 to 55% of naphthene-based hydrocarbon, and 35 to 45% of paraffin-based hydrocarbon. Generally, when the content of paraffin-based hydrocarbon in the processing oil is increased, the hardness of the damping composition is increased, and when the amounts of naphthene-based hydrocarbon and aromatic hydrocarbon are increased, the hardness of the damping layer is decreased and the viscosity of the composition is increased. In order to optimize the above characteristics, processing oil, the content of which satisfies the above range, therefore, is used.
[38] The content of the processing oil in the damping composition is 3 to 20% by weight, preferably, 5 to 15% by weight. When the content is less than the above range, the workability is reduced. Conversely, when the content exceeds the above range, the
damping characteristics and adhesion properties as a damping material are decreased.
[39] The damping composition of the present invention also includes paraffin-based oil for increasing dispersibility and obtaining a softening effect. The paraffin-based oil serves to cause asphalt drops to have charges so that they are not adhered to each other and are mixed with water, and assist the chemical reaction between the asphalt, cement and synthetic rubber. In the present invention, the paraffin-based oil, but which is not limited to, is examples of a product that can be found on the market for application in this art. In one embodiment of the present invention, Kaprosin-25 (product by IL SHBSf CHEMICAL CO.), which was conventionally on the market, is used as the paraffin- based oil.
[40] The content of the paraffin-based oil in the damping composition is 1 to 10% by weight, preferably, 2 to 8% by weight. When the content is less than the above range, the above-described effects are not obtained. On the contrary, when the content exceeds the above range, the damping characteristics and adhesion properties are reduced. Accordingly, the content of the paraffin-based oil is properly selected from the above range.
[41] Air bubbles may be generated from the damping composition including asphalt, synthetic rubber, inorganic filer, processing oil, and paraffin-based oil, as described above, during mixing. The air bubbles lower the properties of the floor structure, including strength, when the damping composition is applied to the floor structure as a damping material. Thus, it is preferable that air bubbles in the damping composition generated during mixing are suppressed.
[42] For the above reason, the damping composition of the present invention further comprises 0.01 to 1.0% by weight, preferably, 0.05 to 0.5% by weight, of an anti- foaming agent. When the content is less than the above range, the property of damping material in a floor structure is decreased. Conversely, when the content exceeds the above range, it is uneconomical due to not increasing the effect any more. Therefore, the content of the anti-foaming agent is properly selected from the above range. Here, a mineral oil type anti-foaming agent, a modified silicon type anti-foaming agent, or a mixture thereof is used as the anti-foaming agent.
[43] As described above, the damping composition of the present invention comprises asphalt, synthetic rubber, inorganic filer, processing oil, paraffin-based oil, and an anti- foaming agent. Further, if necessary, the composition may further include additives, such as a flame retardant, a dispersant, an anti-degrading agent, a viscosity modifying agent, and so on. Such additives are used in the conventional content range. The
content of the additives in the composition ranges from 0.1 to 15 part by weight to 100 parts by weight of the damping composition.
[44] In accordance with the present invention, the damping composition for reducing impact sounds of floor structure in a building, comprising the following steps of:
[45] heating asphalt at a temperature of 100 to 2500C to prepare a melted asphalt,
[46] ailing synthetic rubber, processing oil, and paraffin-based oil into the melted asphalt to prepare a mixture, and
[47] adding inorganic filler and anti-foaming agent into the obtained mixture.
[48] First, asphalt is heated at a temperature of ranging from 100 to 2500C, which is over a softening point, and is molted.
[49] Thereafter, processing oil and paraffin-based oil for dispersion are added to the molten asphalt, and synthetic rubber is further added thereto. Then, the mixture is uniformly mixed in the same temperature range so as to induce chemical reaction between the synthetic rubber and the asphalt.
[50] Then, inorganic filler, an anti-foaming agent, and other additives, if necessary, are added to the obtained mixture and are uniformly mixed to prepare the damping composition with a liquid state.
[51] Such a damping composition is provided on a floor structure of a building, thus forming a damping layer. Here, a sheet prepared by the composition can be attached to the floor structure, or the composition in a liquid state can be applied on the floor structure.
[52] The damping composition of the present invention can reduce heavy-weight impact sounds, which were scarcely reduced, as well as light-weight impact sounds generated between layers. Further, due to castin-place, the damping layer is easily and conveniently constructed on corners or joints, which cannot be sufficiently filled with a damping material.
[53] In accordance with a preferred embodiment of the present invention, a structure that a damping layer made of the composition is inserted into a concrete beam has a loss factor of 0.1. The above loss factor is similar to those of viscoelastic materials, i.e., rubber having a loss factor of 0.1, acryls material having a loss factor of 0.1, and plastic having a loss factor of 0.04.
[54] Accordingly, the damping composition for reducing floor impact in a building in accordance with the present invention is applied to floor structures of buildings, thus excluding noise between layers of the buildings. The buildings include communities of dwellings, such as apartment houses and multiplex houses, studio apartments, high-
grade houses, such as villas and condominiums, hotels, hospitals, bowling alleys, aerobic dancing clubs, and health clubs. The damping composition of the present invention can be applied to all structures of commercial residential buildings, including a wall type structure, a Rahmen-type structure, a steel-framed reinforced concrete (SRC), and a structure with hollow-core. Mode for the Invention
[55] Now, examples of the present invention will be described in detail. However, the present invention is not limited to these examples.
[56] [Example] [57] Example 1 to 4 [58] Straight asphalt added into a mixer, heated to 1800C to melt. To the mixer, SBR (styrene-butadiene rubber), processing oil, and paraffin-based oil were added and combined with the melted straight asphalt at the same temperature for 2 hours.
[59] While maintaining the same temperature, calcium carbonate and an anti-foaming agent were added to the obtained mixture, and uniformly combined with the mixture for 1 hour to prepare a damping composition as a liquid state.
[60] Table 1 below shows the components and amounts of damping compositions in each respective example: [61] Table 1 Composition
[62] (Annotation) [63] 1) Penetration index: 90-100, softening point: 40-500C [64] 2) Styrene-butadiene rubber [65] 3) P-I, product by MCHANG OL IND. CO., LTD. [66] 4) Kaprosin-25, product by IL SHIN CHEMICAL CO. [67] 5) Mean particle size: 0.05/m
[68] 6) Natric-1 , product by IL SHN CHEMICAL CO.
[69] In order to evaluate reducing effects to floor impact sounds of the damping composition of the present invention, the following experiments were performed: Here, for using as a damping material, the damping composition should be required enough dynamic stiffness and attenuation coefficient.
[70] Experimental example 1
[71] Some specimens were prepared by solidifying the damping composition prepared in examples 1 to 4 at room temperature for 3 hours. Thereafter, dynamic characteristics (dynamic stiffness: elastic modulus, loss factor) of the specimens were measured. Here, Resonance Method for Measuring the Dynamic Mechanical Properties of Vis- coelastic Materials standardized by ANSI (American National Standards Institute) S2.22-1998 was applied, and a transfer function method, proposed by Journal of sound and vibration, (J. Park, Transfer function methods to measure dynamic mechanical properties of complex structures, 2005, Journal of Sound and Vibration, 288; J. Park, Measurements of the frame acoustic properties of porous and granular materials, Journal of Sound and Vibration, 2005) was used for the measurement in consideration of characteristics of materials of the composites.
[72] FIG. 1 is a graph illustrating changes of dynamic stiffness and loss factor of specimens prepared in examples 1 to 4 in terms of frequency. Here, the dynamic stiffness means stiffness for reducing the vibration of a structure when the vibration of the structure occurs.
[73] With reference to FIG. 1, the specimens prepared in examples 1 to 4 had dynamic stiffness of ranging from 10 to 10 E at a frequency band of 10 to 5,000 Hz, and loss factor (η ) of 0.4.
[74] The loss factors (η ) of the damping composition of the present invention were
E higher than those of rubber or concrete (0.01). As these results, it is known that the damping composition of the present invention efficiently reduce impact, vibration, and noise, as compared to other materials.
[75] Experimental example 2
[76] This experiment was performed to evaluate whether or not the damping composition prepared in example 1 is used as a damping material. After inserting the damping composition into a concrete complex structure, it measured dynamic characteristics of the structure.
[77] Specifically, a damping material including the damping composition prepared in example 1 was inserted into a concrete beam, and terminals of the structure were
generated using an impact hammer under the condition that the boundary condition of the structure was in a free-free state. Then, a transfer function was obtained from ac- celerometers at the respective positions, thus calculating complex stiffness of the structure. Here, the concrete beam has a length of 2 m, and both terminals have a width of 10 cm and a length of 10 cm (J. Park, Transfer function methods to measure dynamic mechanical properties of complex structures, 2005, Journal of Sound and Vibration, 288).
[78] The impact hammer was generated to the structure, carried out repeatedly 40 times, and it estimated the mean value at the frequency ranges of 10 to 2,000 Hz measured by the accelerometers. At the frequency ranges of 10 to 300 Hz, the impact hammer with a soft rubber tip was used. The impact hammer with a plastic tip was used at the frequency ranges of 300 to 2000 Hz.
[79] FIG. 2 is a graph illustrating changes of bending stiffness and loss factor of a structure in terms of frequency in case that only a concrete beam is used, and HG. 3 is a graph respectively illustrating changes of bending stiffness and loss factor of a structure in terms of frequency in case that a damping material is inserted into a concrete beam.
[80] With reference to FIGs. 2 and 3, bending stiffness (D) of the structure including only the concrete beam according to frequency were approximately 0.4 MN/cπf, and bending stiffness (D) of the structure including the concrete beam and the damping material inserted into the concrete beam in terms of frequency were a bit low.
[81] As shown in FIG. 2, in the structure including only the concrete beam, a loss factors
(η ) in terms of frequency was approximately 0.01. In comparison with this, FIG. 3 illustrates that loss factors (η ) of the structure including the concrete beam and the damping material inserted into the concrete beam in terms of frequency were approximately 0.1. These results mean that the damping material of the present invention effectively reduces vibration and noise when the damping composition is substantially inserted into a structure. Industrial Applicability
[82] The damping composition for reducing floor impact in a building in accordance with the present invention damps effectively impact sounds generated between layers, particularly light-weight impact sounds and heavy-weight impact sounds, which were scarcely damped, thus achieving sound insulating and damping effects between layers. Further, due to castin-place, the damping layer is easily and conveniently constructed on corners or joints, which cannot be sufficiently filled with a damping material.
[83] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims
[1] A clamping composition for reducing light-weight and heavy-weight impact sounds of floor structure in a building simultaneously, comprising: 50 to 80 % by weight of asphalt, 5 to 40% by weight of synthetic rubber, 0.5 to 15% by weight of inorganic filler, 3 to 20% by weight of processing oil, 1 to 10% by weight of paraffin-based oil, and 0.01 to 1.0% by weight of anti-foaming agent.
[2] The damping composition according to claim 1, wherein the asphalt has a penetration index of 60 to 100 and a softening point of 40 to 600C.
[3] The damping composition according to claim 1, wherein the synthetic rubber is one selected from the group consisting of nitrile- butadiene rubber (NBR), isoprene rubber (IR), styrene-butadiene rubber (SBR), styrene-butadiene-styrene (SBS) rubber, styrene-isoprene-styrene (SB) rubber, chloroprene rubber (CR), isobutylene isoprene rubber (IIR), acrylate-chloroethyl vinylether monomer (ACM), chloro sulfonyl polyethylene (CSM), and a mixture thereof.
[4] The damping composition according to claim 1, wherein the inorganic filler is one selected from the group consisting of talc, clay, calcium carbonate, silica, mica, and a mixture thereof.
[5] The damping composition according to claim 1, wherein the processing oil comprises 5 to 25% of aromatic hydrocarbon, 35 to 55% of naphthene-based hydrocarbon, and 35 to 45% of paraffin-based hydrocarbon.
[6] The damping composition according to claim 1, wherein the anti-foaming agent is one selected from the group consisting of a mineral oil type anti^baming agent, a modified silicon type anti-foaming agent, and a mixture thereof.
[7] A method of preparation damping composition of claim 1 for reducing impact sounds of floor structure in a building, comprising the following steps of: heating asphalt at a temperature of 100 to 2500C to prepare a melted asphalt, adlng synthetic rubber, processing oil, and paraffin-based oil into the melted
asphalt to prepare a mixture, and adding inorganic filler and anti-foaming agent into the obtained mixture.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0134872 | 2006-12-27 | ||
| KR1020060134872A KR100734945B1 (en) | 2006-12-27 | 2006-12-27 | Damping composition for reducing of light and heavy impact sound through between stories and a method of preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008078856A2 true WO2008078856A2 (en) | 2008-07-03 |
| WO2008078856A3 WO2008078856A3 (en) | 2008-12-11 |
Family
ID=38503051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2007/000917 WO2008078856A2 (en) | 2006-12-27 | 2007-02-22 | Damping composition for reducing of light and heavy impact sound through between stories and a method of preparation thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100734945B1 (en) |
| WO (1) | WO2008078856A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523263A (en) * | 2017-09-22 | 2017-12-29 | 贵州联洪合成材料有限公司 | A kind of anti-sticking increasing stick damping glue and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059766A1 (en) * | 1981-03-05 | 1982-09-15 | Deutsche Asphalt GmbH | Asphalt-based coating composition for assembling heated floors, and floor structure made with this coating composition |
| US5601642A (en) * | 1993-07-29 | 1997-02-11 | Fina Research, S.A. | Bituminous compositions for soundproofing materials |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970010096A (en) * | 1995-08-01 | 1997-03-27 | 전종윤 | Construction floor laminate and its manufacturing method |
| KR0156348B1 (en) * | 1995-08-26 | 1998-12-01 | 전종윤 | Laminate composition and laminate material for multi-function |
| KR100506986B1 (en) | 2003-05-13 | 2005-08-09 | 김우상 | A composition for noise prevention |
| KR100643205B1 (en) | 2004-02-04 | 2006-11-10 | 주식회사 에이브이티 | Sound Insulation Material in the Floor of the Apartment Building and Manufaturing Methods |
| KR20050090141A (en) | 2004-03-08 | 2005-09-13 | 김기수 | The preparation of water-borne layered coating materials for noise suppression of building floors |
-
2006
- 2006-12-27 KR KR1020060134872A patent/KR100734945B1/en not_active IP Right Cessation
-
2007
- 2007-02-22 WO PCT/KR2007/000917 patent/WO2008078856A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059766A1 (en) * | 1981-03-05 | 1982-09-15 | Deutsche Asphalt GmbH | Asphalt-based coating composition for assembling heated floors, and floor structure made with this coating composition |
| US5601642A (en) * | 1993-07-29 | 1997-02-11 | Fina Research, S.A. | Bituminous compositions for soundproofing materials |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523263A (en) * | 2017-09-22 | 2017-12-29 | 贵州联洪合成材料有限公司 | A kind of anti-sticking increasing stick damping glue and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100734945B1 (en) | 2007-07-06 |
| WO2008078856A3 (en) | 2008-12-11 |
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