JP3675656B2 - Compound - Google Patents

Description

表１によれば、本実施例のシートは厚さに余り関係なく、良好な遮音性を有することが認められる。
【００１６】
〔実施例３〕
下記の処方の配合物をバンバリーミキサーによって調製した。
アスファルト ９０重量部
エラストマーＳＢＳ＊₁ １０ 〃
スラグ粒状物＊₂ ４８０ 〃
カーボンブラック ５０ 〃
老化防止剤 １ 〃
＊₁ ：スチレン−ブタジエン−スチレンブロック共重合体
＊₂ ：実施例２で使用したスラグ粒状物
上記配合物は１４０℃に加熱され、Ｔダイから押出して表２に示す厚さのシートに成形された。
本実施例のシートは前実施例のシートと同様、遮音シートや制振シートとして有用である。
本実施例のシートの騒音レベル測定結果を表２に示す。
【００１７】
【表２】

表２によれば、本実施例のシートも厚さに余り関係なく、良好な遮音性を有することが認められる。
【００１８】
【発明の効果】
本発明においては、高重量で遮音性や制振性に優れているシートが安価に得られる。該シートは例えば自動車の床基礎とカーペットとの間に敷設されたり、建造物の床基礎と床材、畳との間に遮音制振性シートとして敷設される。
【図面の簡単な説明】
【図１】スラグ粒状物製造装置の説明図
【図２】スラグ粒状物の粒度分布を示すグラフ
【符号の説明】
8 スラグ粒状物[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composition useful as a sound insulation sheet or a vibration control sheet for automobile floors, building floors and walls, for example.
[0002]
[Prior art]
Conventionally, as a sound insulation sheet or a vibration damping sheet, a sheet in which rubber or elastomer is blended with asphalt has been provided. The sheet is imparted with sound insulation and vibration control by the damping effect of asphalt viscosity.
[0003]
[Problems to be solved by the invention]
In the conventional sheet, a certain amount of thickness is necessary to obtain good sound insulation and vibration control. For example, when the sheet is used as a sound insulation vibration control sheet for an automobile or the like, if the thickness is large, the floor There is a problem that the vehicle compartment becomes narrow due to high.
[0004]
[Means for Solving the Problems]
The present invention provides, as a means for solving the above-mentioned problems, a blend containing bituminous material, rubber and / or elastomer, and electric furnace oxidation slag granules that are substantially spherical hollow bodies having fine irregularities on the surface. It is to provide.
The blend is preferably formed into a sheet, and the rubber and / or elastomer is preferably added in an amount of 3 to 50 parts by weight in 100 parts by weight of the bitumen.
The present invention is described in detail below.
[0005]
[Bitumen]
As the bitumen used in the present invention, there are asphalt, pitch, tar and the like, natural asphalt and petroleum asphalt can be used, and petroleum asphalt includes straight asphalt and blown asphalt.
[0006]
[Rubber / Elastomer]
Examples of rubber used in the present invention include acrylic rubber, butyl rubber, silicon rubber, urethane rubber, fluoride rubber, polysulfide rubber, graft rubber, butadiene rubber, polybutadiene, isoprene rubber, polyisoprene, chloroprene rubber, poly Isobutylene rubber, polybutene rubber, thiocol rubber, polysulfide rubber, polyether rubber, epichlorohydrin rubber, norbornene terpolymer, hydroxy- or carboxy-terminated polybutadiene, partially hydrogenated styrene-butadiene block copolymer, chlorosulfonated rubber, isobutene -Isoprene rubber, acrylate-butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, pyridine-butadiene rubber, styrene-isoprene rubber, ethylene-propylene copolymer Rubber, ethylene-butene-1 copolymer rubber, ethylene-propylene-ethyldennorbornene copolymer rubber, ethylene-propylene-dicyclopentadiene copolymer rubber, ethylene-propylene-1,4 hexadiene copolymer rubber, ethylene -Butene-1-ethylidene norbornene copolymer rubber, ethylene-butene-1-dicyclopentadiene copolymer rubber, ethylene-butene-1-1,4 hexadiene copolymer rubber, acrylonitrile-chloroprene rubber, styrene-chloroprene rubber Synthetic rubber and natural rubber.
Examples of the elastomer used in the present invention include styrene-based thermoplastic elastomers such as styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer, styrene-hydrogenated polyolefin-styrene copolymer, and styrene-butadiene- There are block copolymers such as a styrene block copolymer and a styrene-rubber intermediate block-styrene copolymer.
Two or more kinds of the rubber or elastomer may be mixed and used, and the rubber and the elastomer may be used in combination.
[0007]
[Electric furnace oxidation slag particulates]
The electric furnace oxidation slag referred to in the present invention is usually CaO 10-26 wt%, SiO ₂ 8-22 wt%, MnO 4-7 wt%, MgO 2-8 wt%, FeO 13-32 wt%, Fe ₂ O ₃ 9-45. Including about 4% by weight, Al ₂ O ₃ 4-16%, Cr ₂ O ₃ 1-4% by weight, and TiO ₂ 0.25-0.70% by weight, P ₂ O ₅ 0.15-0 .50% by weight, S containing about 0.005 to 0.085% by weight, containing about 20 to 45% by weight of Fe for obtaining a stable mineral composition, clay contained in natural aggregate components, organic impurities, It contains no salinity and little free lime, free magnesia or minerals.
[0008]
In order to granulate the electric furnace oxidation slag, a granular material is produced by injecting a melt of the electric furnace oxidation slag into a bladed drum rotating at high speed, and crushing and granulating the melt with the bladed drum. A method of quenching the melted melt in a water mist atmosphere is employed. A plurality of bladed drums may be arranged to perform a plurality of stages of crushing and granulating.
The electric furnace oxidation slag granules thus obtained usually have a particle size of 5 mm or less, those having a particle size of 2.5 mm or less are substantially spherical and have a specific gravity in the range of 3.3 to 3.8. There are no defects such as cracks on the surface, it has fine irregularities and is made of a hollow structure or contains a hollow structure.
[0009]
[Third component]
In addition to the bituminous material, the rubber and / or elastomer, and the electric furnace oxidation slag granules, the compound of the present invention includes, for example, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide. , Magnesium hydroxide, aluminum hydroxide, titanium oxide, iron oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, glass fiber, calcium silicate, bentonite, white carbon, carbon black, Iron powder, aluminum powder, stone powder, zirconia powder, linter, linen, sisal, wood powder and other fillers, sulfur, zinc oxide, magnesium oxide and other vulcanizing agents, polyvalent isocyanate, polyvalent amine, epoxide, etc. Agent, urethane resin, melamine resin, thermosetting resin Thermosetting resins such as ril resin, urea resin, phenol resin, epoxy resin, thermosetting polyester, stearic acid, oleic acid, palmitic acid, zinc stearate, aluminum stearate, paraffin, wax and other lubricants, mineral oil, Plasticizers such as DOP and DBP, crosslinking accelerators, flame retardants, antioxidants, ultraviolet absorbers, anti-aging agents and the like may be added.
[0010]
[Combination]
The rubber and / or elastomer is added in an amount of 3 to 50 parts by weight based on 100 parts by weight of the bitumen. When the added amount of the rubber and / or elastomer is less than 3 parts by weight, the heat resistance and shape retention of the compound are maintained. When the amount exceeds 50 parts by weight, the viscosity of the blend becomes insufficient, and the sound insulation and damping properties are deteriorated.
The electric furnace oxidation slag granules (hereinafter referred to as slag granules) are preferably added in an amount of usually 600 parts by weight or less with respect to 100 parts by weight of the mixture of bitumen and rubber and / or elastomer. If the added amount of the slag granule exceeds 600 parts by weight, the moldability of the blend becomes poor.
The filler is preferably added to improve the strength of the blend. However, when the filler is added, it is added to 100 parts by weight of the mixture of bitumen and rubber and / or elastomer from the viewpoint of moldability. On the other hand, it is usually desirable to add 20 parts by weight or less.
The mixture of the raw materials is usually mixed in a heated and melted state with a known mixer such as a kneader or a Banbury mixer.
[0011]
[Molding]
The blend of the present invention is mainly formed into a sheet. In order to form the compound into a sheet, there are known methods such as a method in which the raw material mixture is sheeted by a calender roll in a heat softened state, and a method in which the raw material mixture is extruded from a T die in a heat softened state. Applied.
In the case of forming into a shape other than the sheet, injection molding, stamping molding, a method of once forming into a sheet and press molding or vacuum molding are applied.
[0012]
[Action]
Since the slag granular material of the present invention is a substantially spherical hollow body as described above and has no defects such as cracks on the surface, even if it is added in a large amount to the composition, the moldability of the composition is not impaired. Further, since fine irregularities are present on the surface of the slag granular material, the compatibility between the asphalt and the rubber or elastomer mixture is good and has good dispersibility.
Moreover, while the slag granular material of the present invention is excellent in acid resistance and alkali resistance, it has a specific gravity of 3.3 to 3.8, a higher specific gravity than aluminum, and is hollow, so that it imparts high sound insulation to the composition. Furthermore, since the slag granular material of the present invention has a large specific gravity, it imparts high vibration damping properties to the blend.
And the slag granular material of this invention was effectively used only for the conventional landfill material etc., and can be provided very cheaply.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1] (Manufacture of slag granules)
FIG. 1 shows an apparatus for producing the slag granular material of the present invention.
That is, the electric furnace oxidation slag melt (1) at around 1500 ° C. is transferred from the pan (2) to the shooter (3), and injected from the shooter (3) into the bladed drum (4, 5) rotating at high speed. The steelmaking slag melt (1) is crushed and granulated by the bladed drum (4, 5), and the granulated product (1A) of the electric furnace oxidation slag melt is sprayed into a quenching chamber (6) ( 7) Quenched by water mist sprayed from. And the slag granular material (8) obtained in this way is stored in the storage container (9).
The slag granule (8) is a substantially spherical hollow body, has no defects such as cracks on the surface, has fine irregularities, and has high hardness (Vickers hardness of about 755, Mohs hardness of about 6). It has excellent abrasion resistance, true specific gravity of 3.84, absolute dry specific gravity of 3.52, fire resistance of 1100 ° C., and excellent permeability, conductivity, acid resistance, alkali resistance and the like.
The particle size distribution of the slag granule (8) is shown in FIG.
[0014]
[Example 2]
A formulation with the following formulation was prepared by a Banbury mixer.
Asphalt 80 parts by weight Chloroprene rubber 20 〃
Slag granules * 500 〃
Carbon black 20 〃
Mineral oil 5 〃
Zinc oxide 8 〃
Vulcanization accelerator 1 〃
Anti-aging agent 1 〃
* Slag granular material: The slag granular material of Example 1 that has passed through a sieve having a nominal diameter of 0.3 mm is selected.
The blend was heat-softened to 130 ° C. and formed into a sheet having a thickness shown in Table 1 by a calender roll.
The sheet of the present embodiment is useful as a floor damping sheet for a building or a sound insulation sheet stretched on a wall surface.
Table 1 shows the noise level measurement results of the sheet of this example.
[0015]
[Table 1]

According to Table 1, it is recognized that the sheet of this example has a good sound insulation property regardless of the thickness.
[0016]
Example 3
A formulation with the following formulation was prepared by a Banbury mixer.
Asphalt 90 parts by weight Elastomer SBS * ₁ 10 〃
Slag granule * ₂ 480 〃
Carbon black 50 〃
Anti-aging agent 1 〃
* ₁ : Styrene-butadiene-styrene block copolymer * ₂ : Slag granules used in Example 2 The above blend was heated to 140 ° C., extruded from a T-die, and formed into a sheet having the thickness shown in Table 2. It was.
The sheet of this embodiment is useful as a sound insulation sheet or a vibration damping sheet, like the sheet of the previous embodiment.
Table 2 shows the measurement results of the noise level of the seat of this example.
[0017]
[Table 2]

According to Table 2, it is recognized that the sheet of this example also has good sound insulation properties regardless of the thickness.
[0018]
【The invention's effect】
In the present invention, a sheet having high weight and excellent sound insulation and vibration damping properties can be obtained at low cost. For example, the sheet is laid between a floor foundation of an automobile and a carpet, or is laid as a sound-insulating and damping sheet between a floor foundation of a building, a flooring material, and a tatami mat.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a slag granular material production apparatus. FIG. 2 is a graph showing a particle size distribution of the slag granular material.
8 Slag granules

Claims (3)

A blend comprising bituminous material, rubber and / or elastomer, and electric furnace oxidized slag granules which are substantially spherical hollow bodies having fine irregularities on the surface The blend according to claim 1, wherein the blend is formed into a sheet. The blend according to claim 1 or 2, wherein 3 to 50 parts by weight of the rubber and / or elastomer is added to 100 parts by weight of the bitumen.

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