JP2000178470A - Coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating composition capable of giving a coated layer excellent in sound-insulating property and vibration-damping property in a less expensive manner by making the composition contain a specific component and an electric furnace oxidized slag-granulated material. SOLUTION: This coating composition is obtained by compounding (A) at least one selected from among (i) a synthetic resin emulsion, (ii) a rubber latex and (iii) a bituminous emulsion with (B) an electric furnace oxidized slag granulated material. The component B contains about 10-26 wt.% of CaO, 8-22 wt.% of SiO2, 4-7 wt.% of MnO, 2-8 wt.% of MgO, 13-32 wt.% of FeO, 9-45 wt.% of Fe2O3, 4-16 wt.% of Al2O3 and 1-4 wt.% of Cr2O3; about 0.25-0.70 wt.% of TiO2, 0.15-0.50 wt.% of P2O5 and 0.005-0.085 wt.% of S as minor components; and about 20-45 wt.% of Fe. It is preferable that the component B has particle sizes of 5 mm or less; and the granules having particle sizes of 2.5 mm or less are roughly spherical, and have specific gravities of 3.3-3.8, fine unevenness and hollow structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition useful for forming, for example, a sound insulation layer and a vibration damping layer.

[0002]

2. Description of the Related Art Conventionally, as a coating composition for forming a sound insulating layer or a vibration damping layer, a coating composition in which metal powder or barium sulfate is blended with a synthetic resin emulsion has been provided.
The coating composition is increased in weight by metal powder or barium sulfate to form a layer provided with sound insulation and vibration damping properties.

[0003]

In order to obtain a layer having high sound insulation or vibration damping properties, it is necessary to add a large amount of metal powder or barium sulfate to the synthetic resin emulsion. However, if metal powder or barium sulfate is made into fine powder, it becomes expensive, the surface area increases, and it is easily corroded.In addition, barium sulfate is very expensive. There is a problem that fluidity is impaired. Copper and aluminum are metals that are not easily corroded, but copper fine powder is very expensive, while aluminum fine powder is light in weight, so that a layer with high sound insulation cannot be obtained.

[0004]

According to the present invention, there is provided, as a means for solving the above-mentioned problems, one or more kinds selected from the group consisting of a synthetic resin emulsion, a rubber latex, and a bituminous emulsion; And a slag granule (8). The present invention will be described in detail below.

[Synthetic Resin Emulsion] Examples of the synthetic resin emulsion used in the present invention include acrylate resin, methacrylate resin, vinyl acetate resin, vinyl propionate resin, and vinyl acetate-ethylene copolymer. Resin, vinyl acetate-maleic acid copolymer resin, styrene resin, vinyl chloride resin,
There are synthetic resin emulsions such as vinyl chloride-ethylene copolymer resin, vinyl chloride-vinyl acetate copolymer resin, vinylidene chloride resin, and polyvinyl ether resin.

[Rubber latex] Examples of the rubber latex 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, polyisobutylene rubber, polybutene rubber,
Thiokol rubber, polysulfide rubber, polyether rubber, epichlorohydrin rubber, norbornene terpolymer, hydroxy or carboxy-terminal modified 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 Copolymer rubber, ethylene-propylene-dicyclopentadiene copolymer rubber, ethylene-propylene-1,4 hexadiene copolymer rubber, ethylene-butene-1-ethylidene norbornene Coalescing rubber, ethylene - butene-1
Latex of synthetic rubber and natural rubber such as dicyclopentadiene copolymer rubber, ethylene-butene-1-1,4 hexadiene copolymer rubber, acrylonitrile-chloroprene rubber, and styrene-chloroprene rubber. Further, as the rubber latex used in the present invention,
Styrene-butadiene-styrene copolymer, styrene-
Styrene-based thermoplastic elastomers such as isoprene-styrene copolymer and styrene-hydrogenated polyolefin-styrene copolymer, and block copolymers such as styrene-butadiene-styrene block copolymer and styrene-rubber intermediate block-styrene copolymer. There are latexes of elastomers such as coalescing. Two or more of the above rubber latexes may be used as a mixture.

[Bituminous Emulsion] The bituminous emulsion used in the present invention is, for example, an emulsion obtained by emulsifying bituminous substances such as blown asphalt, asphalt compound, straight asphalt, tar and pitch in water.

[Electric Furnace Oxidized Slag Granules] The electric furnace oxidized slag referred to in the present invention usually contains 10 to 26% by weight of CaO,
i O ₂ 8~22 weight%, Mn O4~7 weight%, Mg O2
8 wt%, Fe O13~32 wt%, Fe ₂ O ₃ 9~4
5 wt%, Al ₂ O ₃ 4 to 16 wt%, Cr ₂ O ₃ containing about 1 to 4 wt%, further Ti O ₂ 0.25 to as a minor component
0.70 wt%, P ₂ O ₅ 0.15 to 0.50 wt%,
S contains about 0.005 to 0.085% by weight, and contains about 20 to 45% by weight of Fe for obtaining a stable mineral composition, and does not contain clay, organic impurities, and salts contained in natural aggregate components at all. Free from unstable free lime, free magnesia or minerals.

[0009] In order to granulate the electric furnace oxidized slag to produce granules, a melt of the electric furnace oxidized slag is poured into a high-speed rotating bladed drum, and the melt is crushed and granulated by the bladed drum. Quenched in a water mist atmosphere. A plurality of the bladed drums may be arranged to perform crushing and granulation in a plurality of stages. The particles of the electric furnace oxidized slag thus obtained usually have a particle size of 5 mm or less, and those having a particle size of 2.5 mm or less are substantially spherical, and the specific gravity is in the range of 3.3 to 3.8. There are no defects such as cracks on the surface, the surface has fine irregularities, and it has a hollow structure or includes a hollow structure.

[Third component] The above synthetic resin emulsion,
Other than rubber latex, and bituminous emulsion and the above-mentioned electric furnace oxidized slag granules, the coating composition of the present invention includes, for example, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, and magnesium hydroxide. , Aluminum hydroxide, titanium oxide, iron oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica,
Filler such as glass fiber, ceramic fiber, rock wool, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, stone powder, zirconia powder, linter, linen, sisal, wood powder, sulfur, zinc oxide, Vulcanizing agents such as magnesium oxide, polyamines, crosslinking agents such as epokind, melamine resins, urea resins,
Thermosetting resin such as phenolic resin, dextrin, gum arabic, sodium alginate, polyvinyl alcohol,
Carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, sodium polyacrylate, polysodium methacrylate, polyacrylamide. Polymethacrylamide, polyvinyl methyl ether, carboxyl group-containing acrylic resin emulsion, vinyl acetate-maleic acid copolymer, styrene-maleic acid copolymer, polyvinylpyrrolidone, polyacrylate partially saponified, polymethacrylate partially saponified Thickeners for things,
Higher alcohol sulfate (Na salt or amine salt), alkyl allyl sulfonate (Na salt or amine salt), alkyl naphthalene sulfonate (Na salt or amine salt), alkyl naphthalene sulfonate condensate, alkyl phosphate, dialkyl Anionic surfactant such as sulfosuccinate, rosin soap, fatty acid salt (Na salt or amine salt), polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, polyoxyethylene alkyl ester, polyoxyethylene alkylamine, poly Nonionic surfactants such as oxyethylene alkylolamine, polyoxyethylene alkyl amide, sorbitan alkyl ester, and polyoxyethylene sorbitan alkyl ester Silamine acetate, imidazoline derivative acetate, polyalkylene polyamine derivative or salt thereof, octadecyltrimethylammonium chloride, trimethylaminoethylalkylamide halogenide, alkylpyridinium sulfate, cationic surfactant such as alkyltrimethylammonium halide, stearic acid, Lubricants such as oleic acid, palmitic acid, paraffin and wax, tackifiers such as rosin and petroleum resin, mineral oils, plasticizers such as DOP and DBP, crosslinking accelerators, flame retardants, antioxidants, ultraviolet absorbers, antiaging An agent or the like may be added.

[Blending] The electric furnace oxidized slag granules (hereinafter referred to as slag granules) are 100% by weight of the solid content of the synthetic resin emulsion and / or rubber latex and / or bituminous emulsion (hereinafter referred to as "expanding agent"). It is usually desirable to add 600 parts by weight or less per part.
If the amount of the slag granules exceeds 600 parts by weight, the fluidity of the coating composition will be poor. The filler is desirably added to improve the strength of the coating composition. However, when the filler is added, from the viewpoint of fluidity, the filler is usually added in an amount of 50 wt. It is desirable to add in an amount of not more than part by weight. The coating composition is desirably thickened to 5000 cps or more by the thickener. High viscosity coating compositions can be applied to thick layers.

[Use] The coating composition of the present invention is applied directly to a building such as a wall or floor of a building or a floor of a vehicle body of an automobile, or an inorganic building board such as a gypsum board, a calcium silicate board or a wood cement board. Wood board such as plywood, hard board, verticle board, cork board, plastic sheet such as polyvinyl chloride sheet, polyethylene sheet, polypropylene sheet, polyester sheet, polyurethane sheet, polyamide sheet, polystyrene foam board, polypropylene foam board, polyurethane It is applied to a plastic foam plate such as a foam plate, a nonwoven fabric, a fiber knitted fabric, a fiber sheet such as a carpet, a linoleum, a tile, a brick and the like.

[0013]

The slag granules of the present invention are substantially spherical hollow bodies as described above, and have no defects such as cracks on the surface. Therefore, even if a large amount of slag is added to the coating composition, the coating composition can be applied. Does not impede adhesion. In addition, since fine irregularities are present on the surface of the slag granules, the slag has good compatibility with synthetic resins, rubbers, and bituminous materials, has good dispersibility in a spreading agent, and has a high strength and a high resistance to the coating layer. Improves abrasion. The slag granules of the present invention are excellent in acid resistance and alkali resistance,
The specific gravity is 3.3 to 3.8, which is higher than that of aluminum and is hollow, so that the coating layer has high sound insulation. Furthermore, since the slag granules of the present invention have a large specific gravity, they impart high damping properties to the coating layer. The slag granules of the present invention have been effectively used only for conventional landfill materials and the like, and can be provided at extremely low cost.

[0014]

EXAMPLES Example 1 (Production of Granular Slag) FIG. 1 shows an apparatus for producing a granular slag of the present invention. That is, the molten iron oxide slag (1) at around 1500 ℃
From (2), it is transferred to a shooter (3), and injected from the shooter (3) into a high-speed rotating bladed drum (4,5). The steelmaking slag melt (1) is finely crushed and granulated by the bladed drums (4, 5), and the granulated material (1A) of the electric furnace oxidized slag melt is sprayed into a quenching chamber (6) by a spray device (1). 7) Quenched by water mist sprayed from. The slag granules (8) thus obtained are stored in the storage container (9).
Is stored in The granular slag (8) is a substantially spherical hollow body, has no defects such as cracks on its surface, has fine irregularities, and has high hardness (about 755 in Vickers hardness and about 6 in Mohs hardness). It has excellent wear resistance and a true specific gravity of 3.
84, the absolute specific gravity is 3.52, the fire resistance is 1100 ° C., and it is excellent in magnetic permeability, conductivity, acid resistance, alkali resistance and the like. FIG. 2 shows the particle size distribution of the slag granules (8).

Example 2 A coating composition having the following formulation was mixed and prepared. Styrene butadiene rubber latex (50% by weight) 100 parts by weight Asphalt emulsion (50% by weight) 300 〃Slag granules * 500 メ ト キ シ Methoxycellulose 5 ポ リ Polyoxyethylene lauryl phenol ether 2 防止 Antioxidant 1 〃 * Slag granules: implemented From the slag granules of Example 1, those that have passed through a sieve with a nominal diameter of 0.3 mm are selected. The coating composition of this example has a viscosity of 15000 cps / 25 ° C., and is applied to the building concrete floor (11) to a thickness of 8 mm to form a coating layer (12) as shown in FIG. The coating layer (12)
After being left for one day, a plywood (13) is placed thereon and pressed. Then, the unevenness existing on the concrete floor (11) is absorbed by the coating layer (12), and the surface of the coating layer (12) becomes smooth. A wooden flooring (14) is laid on the plywood (13).

The floor impact sound insulation performance of the floor structure having the above structure is
The test was conducted based on a measuring method and a sound insulation grade according to JISA1418 and JISA1419. The results are shown in FIG. 4 (light impact sound of tapping) and FIG. 5 (heavy impact sound of tire). The dotted line graph in the figure is a comparative floor structure in which the coating layer (12) is omitted. According to FIG. 4, since the floor structure of the present embodiment is below the graph of L-65 as shown by the solid line graph, the sound insulation class is determined to be L-65, and the floor structure has excellent sound insulation. The comparative floor structure without layers is below the graph of L-70 as shown in the dotted line graph, and the sound insulation class is L
It was determined to be -70, which is inferior to the floor structure of the present embodiment. According to FIG. 5, since the floor structure of the present embodiment is below the graph of L-70 as shown in the solid line graph, the sound insulation class is L.
-70, indicating that the comparative floor structure having excellent sound insulation properties but no covering layer was L-75 as shown in the dotted line graph.
The sound insulation class is determined to be L-75, which is inferior to the floor structure of the present embodiment.

Example 3 The coating composition of Example 2 was applied to a 10 mm-thick polystyrene foam plate to a thickness of 5 mm.
The coating was left to dry for a week. Table 1 shows the measurement results of the noise level of the polystyrene foam having the coating layer of this example.
Shown in

[Table 1] According to Table 1, almost no sound insulation is expected with the polystyrene foam plate alone, but the polystyrene foam plate having the coating layer of this example has excellent sound insulation performance.

Example 4 Methyl methacrylate: 2-
Ethylhexyl acrylate: methacrylic acid (30: 6
8: 2 weight ratio) 60% by weight of copolymer 10 emulsion 10
A coating composition having a viscosity of 15,000 cps was prepared by mixing 0 parts by weight, 150 parts by weight of the slag granules as in Example 2, 50 parts by weight of calcium carbonate, and 3 parts by weight of carboxymethyl cellulose. The above coating composition is applied to the back surface of a carpet for automobile floor covering in a thickness of 10 mm, and dried by heating at 180 ° C. for 5 minutes. Table 2 shows the measurement results of the noise level of this example.

[Table 2] According to Table 2, the sound insulation performance of the carpet is greatly improved by backing the coating layer of this example.

In addition to the above examples, for example, the coating composition of Example 2 is applied to the floor surface of an automobile body to form a sound insulating and damping layer.

[0020]

According to the coating composition of the present invention, a coating layer having excellent sound insulation and vibration damping properties can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a slag granular material manufacturing apparatus.

FIG. 2 is a graph showing the particle size distribution of granular slag.

FIG. 3 is a cross-sectional view of a floor structure according to a second embodiment.

FIG. 4 is a graph showing the sound insulation performance of a floor structure against a light impact sound.

FIG. 5 is a graph showing the sound insulation performance of a floor structure against heavy impact noise.

[Explanation of symbols]

 8 Granulated slag

Continued on the front page (72) Inventor Keiichi Tsuruyama 62, Hamaji, Nitta, Shimoyama-mura, Kaifu-gun, Aichi Prefecture F-term (reference) 4J038 BA241 CA021 CA041 CG141 HA566 KA20 MA08 MA10 MA10

Claims (1)

[Claims] 1. A synthetic resin emulsion, rubber latex,
Coating composition comprising one or more selected from the group consisting of slags and bituminous emulsions, and electric furnace oxidized slag granules