JPH08207187A - Vibration damping and soundproofing material, vibration damping and soundproofing floor material, and method for manufacturing vibration damping and soundproofing material - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vibration-damping and sound-proofing material and a vibration-damping and sound-proofing floor material, which are excellent in damping and shock-absorbing properties and have minimal deformation even when a load is applied to the floor for a long time. Further, it is to provide a manufacturing method capable of filling a high specific gravity filler with a high ratio and capable of manufacturing a relatively thick vibration damping and soundproofing material with high productivity. [Structure] A high specific gravity filler (85 to 99.5% by weight) and a binder component (15 to 0.5% by weight) containing a non-vulcanized rubber and a crosslinked urethane resin as main components. Resin weight ratio is 5: 1 to 0.5: 1
And a vibration damping and soundproofing material having a porosity of 30% to 60%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration-damping and sound-proofing material for houses and the like, and more particularly to a vibration-damping and sound-proofing floor material suitable for use on the floor of a house, and a method for manufacturing the vibration-damping and sound-proofing material.

[0002]

2. Description of the Related Art With the recent increase in wooden floors, multi-family houses, and the like, in apartment houses and general individual houses, there is an increasing demand for prevention of floor noise downstairs. It is important that the vibration damping and soundproofing material used to prevent floor noise has excellent vibration damping and soundproofing properties.

For example, the following have been proposed as suitable vibration-damping and sound-insulating materials for improving the impact sound of floors, especially wooden floors.

In Japanese Patent Laid-Open No. 63-13738, a sheet obtained by adding a high specific gravity filler to asphalt is disclosed in Japanese Laid-Open Patent Publication No.
JP-A-3-259595 and JP-A-60-16453.
Japanese Patent Publication No. 4 proposes a sheet in which a high specific gravity filler is added to rubber. These sheets are usually applied on a floor base material such as plywood, and wood flooring is applied on it.

The sheet in which the high specific gravity filler is added to the asphalt is produced by a method in which the high specific gravity filler is mixed with the asphalt or rubber in a molten state and is molded into a shape such as a sheet. Since this sheet is poor in elasticity and has a low shock absorbing capacity, the floor shock noise is not sufficiently improved when used alone. Therefore, it is usually necessary to use it together with a cushioning and vibration damping and soundproofing material such as a resin foam. When a load is applied to the floor for a long time, this sheet is likely to be deformed such as a dent. Furthermore, in the manufacturing method of this sheet, since the viscosity of the melt when mixing the high specific gravity filler is high,
It is difficult to mix a large amount of filler. Therefore, it is difficult to obtain a vibration damping and soundproofing material having high specific gravity.

A sheet obtained by adding a high specific gravity filler to the above rubber has a large loss coefficient. Such a sheet is formed into a sheet by mixing a high specific gravity filler with an emulsion of rubber having excellent vibration damping performance. After that, it is prepared by a method of drying and solidifying. According to this manufacturing method, since the viscosity of the rubber emulsion at the time of mixing is low, it is possible to add a relatively large amount of filler, and a vibration damping and soundproofing material having a high specific gravity can be easily obtained. In this case, either unvulcanized rubber or vulcanized rubber is used as the rubber component. However, this sheet has the following problems. (1) A sheet containing a non-vulcanized rubber component has a large loss coefficient and high vibration damping performance, but is susceptible to deformation such as dents when a load is applied to the floor for a long period of time. (2) A sheet containing a vulcanized rubber component has a low damping factor of the rubber component due to vulcanization, resulting in poor vibration damping performance of the floor material, and sufficient noise due to the vibration of the floor plate generated in the case of floor impact. Can not be reduced to. (3) In both the sheets using vulcanized rubber and non-vulcanized rubber, when the amount of the filler added is increased, the elasticity is lowered and the shock absorbing property is lowered. However, it is difficult to add a large amount of filler in order to maintain these shock absorbing properties. Therefore, it is difficult to obtain a sheet having high specific gravity and excellent cushioning properties. Furthermore, if a large amount of high specific gravity filler is added,
When molding a sheet etc., it is a drawback that sufficient shape retention is not obtained from the molding to the completion of drying, so that only a relatively thin sheet can be obtained and productivity is low. .

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to provide excellent vibration damping and soundproofing and to exert a load on the floor for a long time. Even so, it is an object of the present invention to provide a vibration-damping and sound-proofing material and a vibration-damping and sound-proofing flooring material with minimal deformation. Another object of the present invention is to provide a manufacturing method capable of filling a high specific gravity filler at a high ratio and capable of manufacturing a relatively thick vibration damping and soundproofing material and vibration damping and soundproofing floor material with high productivity. Is.

[0008]

The vibration damping and soundproofing material of the present invention comprises:
A high specific gravity filler (85 to 99.5% by weight) and a binder component (15 to 0.5% by weight) containing a non-vulcanized rubber and a crosslinked urethane resin as main components. It is a vibration and soundproof material having a ratio of 5: 1 to 0.5: 1 and a porosity of 30% to 60%.

The vibration-damping and sound-proofing floor material of the present invention comprises the above-mentioned vibration-damping and sound-proofing material laminated on a wood layer.

The method for producing a vibration damping and soundproofing material of the present invention comprises the following steps: (A) a step of mixing a high specific gravity filler and an aqueous slurry containing an emulsion of unvulcanized rubber; (B) an aqueous slurry A step of mixing a water-crosslinkable urethane prepolymer; (C) a step of shaping an aqueous slurry containing the urethane prepolymer into a desired shape or laminating it on a substrate; (D) a water-crosslinkable urethane prepolymer A step of gelling the aqueous slurry by cross-linking; and (E) a step of drying and removing unnecessary water from the gelled slurry;
Includes.

The high specific gravity filler used in the vibration damping and soundproofing material of the present invention preferably has a specific gravity of 2 or more, more preferably 4 or more.
Is a filling material. When the specific gravity is less than 2, the vibration damping and soundproofing properties are insufficient. As the high specific gravity filler, iron sand, iron powder, iron oxide, calcium carbonate, zircon sand, chromite sand, iron slag powder, silica sand, lead powder, tin oxide, zinc oxide,
Barium sulfate, iron sulfide, mica, aluminum hydroxide,
Talc, clay, etc. are used. The shape of the filler may be powder, fibrous, flaky, or the like, but powder is preferable from the viewpoint of mixing. The particle size of the filler is preferably 3 μm to 2 mm. More preferably, it is 5 μm to 500 μm. If it exceeds 2 mm, it is difficult to mix it uniformly, so the performance of the obtained vibration damping and soundproofing material becomes uneven, and the bulk specific gravity becomes small,
This is because it is difficult to mix a large amount of filler. Three
If it is less than μm, the bulk specific gravity becomes small, and it is difficult to mix a large amount of filler, so it is difficult to obtain a sheet with high specific gravity, and it is difficult to obtain a sheet with high vibration damping properties. Because there is.

The content of the above-mentioned filler in the vibration damping and soundproofing material of the present invention is 85 to 99.5% by weight, preferably 95 to 99% by weight. If it is less than 85% by weight, soundproofing is insufficient. If it exceeds 99.5% by weight, it is difficult to uniformly mix, so that the variation of the vibration damping and soundproofing depending on the parts of the material becomes large.

The binder component used in the present invention contains unvulcanized rubber and crosslinked urethane resin as main components.

The unvulcanized rubber is natural rubber, SBR, N
It is a rubber such as BR, CR, BR and IR, which is not vulcanized. From the viewpoint of manufacturing, those which can be emulsified can be preferably used. For example, SB
R emulsion, NBR emulsion and the like can be preferably used.

The above-mentioned crosslinked urethane resin is a crosslinked product obtained by reacting a urethane prepolymer having an NCO group at the terminal with water.

The urethane prepolymer is a terminal NC obtained by reacting a polyol with a polyisocyanate.
It is a prepolymer containing O groups. As a polyol,
For example, polyethylene glycol, polyoxyalkylene polyol such as polypropylene glycol, polyester polyol, polycaprolactone polyol, dimer acid ester polyol, polycarbonate polyol, butadiene polyol, acrylic polyol, hydrolyzate of ethylene-vinyl acetate copolymer, chloroprene polyol, etc. Is mentioned. Examples of polyisocyanates include tolylene diisocyanate (TD
I), diphenylmethane diisocyanate (MDI),
Polymethylene polyphenyl isocyanate (C-MD
I), hexamethylene diisocyanate, xylylene diisocyanate (XDI), isophorone diisocyanate, hydrogenated XDI, hydrogenated MDI and the like.

The urethane prepolymer is preferably hydrophilic in view of dispersibility in an aqueous slurry. For example, polyethylene glycol and polypropylene glycol are contained as a polyol component in a molar ratio of about 85:15, tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI) are contained as an isocyanate component, and a terminal NCO is contained. A prepolymer having a ratio of about 5% can be preferably used. The weight average molecular weight (Mw) of the prepolymer is usually 8 × 1.
0 ^{2 to} 3 × 10 ⁴ , preferably 2 × 10 ³ to 2 × 10 ⁴ / having a number average molecular weight (Mn) of 5 × 10 ² to 1 × 10 ⁴ , preferably 8 × 10 ² to 8 × 10 ³ . Is used.

The content of the binder component in the vibration damping and soundproofing material of the present invention is 15 to 0.5% by weight, preferably 5 to 1%.
% By weight. When the content exceeds 15% by weight, the amount of the high-specific-gravity filler becomes small, so that the vibration damping property is insufficient.
If it is less than 0.5% by weight, the strength of the obtained vibration damping and soundproofing material is insufficient.

The weight ratio of the unvulcanized rubber to the crosslinked urethane resin in the binder component is 5: 1 to 0.5: 1, preferably 3: 1 to 1: 1. When the weight ratio of the unvulcanized rubber to the cross-linked urethane resin exceeds 5: 1, the cross-linked urethane resin is insufficient to prevent deformation due to compression load. When the unvulcanized rubber has a weight ratio of less than 0.5: 1 with respect to the crosslinked urethane resin, the unvulcanized rubber exhibits insufficient vibration damping performance.

The vibration-damping and sound-insulating material of the present invention may further contain a processing aid (for example, a plasticizer and a thickening agent for controlling the softness of rubber and urethane), a pigment and the like, if necessary. obtain. As the plasticizer, for example, dioctyl phthalate (DOP) can be used, and as the thickener, for example, methyl cellulose can be used.

Further, the vibration damping and soundproofing material of the present invention has a porosity of 30 to 60%, preferably 35 to 50%.
When the porosity is less than 30%, the shock-damping and sound-proofing material obtained has insufficient shock-damping property. When it exceeds 60%, the specific gravity of the obtained vibration damping and soundproofing material becomes small, so that the vibration damping property is insufficient and the deformation under a compressive load becomes large. Here, the porosity refers to the ratio of the voids present in the apparent volume of the vibration damping and soundproofing material to the apparent volume. The porosity is calculated by the following formula using the apparent specific gravity of the obtained vibration damping and soundproofing material and the true specific gravity calculated from the compounding composition.

[0022]

[Equation 1]

The thickness of the vibration damping and soundproofing material is 0.5 to 20 mm,
It is preferably 1 to 15 mm. When the thickness is less than 0.5 mm, the vibration damping cushioning property decreases. If it exceeds 20 mm, the weight becomes large and the construction becomes difficult.

The vibration-damping and sound-insulating flooring material of the present invention comprises the above-described vibration-damping and sound-insulating material laminated on a wood layer.

Here, the wood layer refers to a wood panel that is usually used for a floor structure such as a base material or finishing material for a house. Examples of such a wood layer include floor base materials such as plywood, particle board, OSB (Oriented Strand Board), MDF board (Medium Density Fiber Board), and floor finishing materials such as parquet flooring. To be

In this vibration damping and soundproofing floor material, the vibration damping and soundproofing material may be laminated on at least one side or both sides of the wood layer,
Alternatively, it is a floor material in which the vibration damping and soundproofing material can be laminated between the two wood layers. When using it as a floor material,
Since the vibration-damping and sound-insulating material is used in a state in which it is provided between the base material and the finishing material, it is preferable that the vibration-damping and sound-proofing material, when used as the base material, has a finishing material on the upper surface of the wood layer. When used as, it is laminated on the lower surface of the wood layer.

The vibration damping and soundproofing material may be laminated on the wood layer by adhesion with an adhesive. Alternatively, when the vibration damping and soundproofing material is manufactured by the method described below, the vibration damping and soundproofing materials can be stacked.

The vibration damping and soundproofing material of the present invention can be manufactured by a method including the following steps (A) to (E). 1 to 4 show a typical method of manufacturing the vibration damping and soundproofing material of the present invention.

(A) As shown in FIG. 1, first, in the mixing tank 1, a high specific gravity filler 3 and an emulsion 4 of unvulcanized rubber are prepared.
And are mixed using a stirring blade 2 to prepare a slurry 7.
At this time, an appropriate amount of water 5 and a thickener 6 such as methylcellulose 6 may be added as needed to adjust the concentration of the emulsion or the viscosity of the slurry. The total solid content concentration in the slurry is preferably 75 to 98% by weight, and more preferably 85 to 95% by weight. If it is less than 75% by weight, the high specific gravity filler tends to settle,
When it exceeds 98% by weight, workability is deteriorated because the viscosity of the slurry is high. As a mixing method, an ordinary method can be adopted. For example, a mixer having a stirring blade and a screw type mixer can be used.

(B) Next, the above slurry and a water-crosslinkable urethane prepolymer are mixed. Here, the water-crosslinkable urethane prepolymer is crosslinked by a reaction with water,
A prepolymer that forms a crosslinked urethane resin. The method of mixing these is, for example, a method of stirring with a mixer having stirring blades, and as shown in FIG. 2, a urethane prepolymer 10 is supplied while the slurry is being transferred with a pump 8, and a static mixer 9 or the like is used. Any method of mixing can be utilized.

The amount of the urethane prepolymer supplied is preferably such that the weight ratio of the unvulcanized rubber to the urethane prepolymer is 5: 1 to 1 in view of the performance of the vibration damping and soundproofing material to be obtained.
It is selected to be in the range of 1: 1 and, considering the production efficiency, the weight ratio of water to the urethane prepolymer in the slurry is preferably 5: 1 to 50: 1, more preferably 10: 1 to. It is chosen to be in the range of 30: 1. If the amount of water to the urethane prepolymer is less than 5: 1 by weight, the time required for gelation of the slurry caused by crosslinking between the urethane prepolymer and water becomes extremely short, so that the slurry is formed into a desired shape. Alternatively, it is difficult to secure the time required for applying. The weight ratio of water to urethane prepolymer is 50:
For the purpose of 1 above, the time until the gelation becomes long, the production efficiency decreases, and the gelation becomes insufficient, so that the shape retention of the formed slurry is insufficient.

(C) Further, the slurry to which the urethane prepolymer is added is shaped into a desired shape or applied onto a desired substrate. As a method of shaping into a sheet or coating on a base material, as shown in FIG. 2, a coater 12 is used to continuously transfer to a desired thickness on a coating base material 11 while being transferred by a conveyor 13. Molding or coating method, extruder method, spray coating, heat-drying after placing material in the mold, etc. can be used. Is. However, it is necessary to shape or apply the slurry before the gelation of the slurry is completed, that is, while the slurry has fluidity. The time from the mixing of the urethane prepolymer into the slurry to the gelation thereof depends on the concentration of the urethane prepolymer in water, and is in the range of 1 to 10 minutes within the above selection range. Therefore, considering that molding is performed within the time until gelation, a method in which the steps from mixing the urethane prepolymer to shaping or coating can be continuously performed is preferable, as shown in FIG.

Examples of the base material to which the above slurry is applied include non-woven fabrics made of polyester or the like, wood panels such as plywood, and masonry boards.

(D) The shaped or applied slurry is
The NCO group of the urethane prepolymer reacts with water to form a crosslinked product by a urea bond, thereby gelling (14 in FIG. 2). In this reaction, CO ₂ gas is generated, and the reaction product slurry has CO ₂ bubbles. This reaction is shown in the following formula (1).

[0035]

Embedded image

Since this reaction usually takes place at room temperature, heating is not particularly required, but heating may be performed as a means for promoting gelation.

(E) Finally, as shown in FIG. 3, the gelled slurry 14 is dried in a dryer 15 to remove excess water, whereby a vibration damping and soundproofing material is obtained. Drying
It is usually performed at 40 to 60 ° C. After that, as shown in FIG. 4, the obtained vibration damping and soundproofing material 16 is cut into a desired size, if necessary.

[0038]

The vibration-damping and sound-proofing material of the present invention contains a high specific gravity filler in a high concentration, and thus has a high specific gravity. Further, since it contains a crosslinked urethane resin component as a binder component, it is deformed by a long-term compression load. It is difficult, and further, by having an appropriate porosity, it is possible to maintain appropriate elasticity against compression, so that it has excellent vibration damping properties and high shock absorbing properties.

The vibration-damping and sound-insulating flooring material of the present invention has a high vibration-damping and sound-proofing property in terms of vibration-damping property and shock-absorbing property because the vibration-damping and sound-proofing material is laminated on the wood layer.

On the other hand, in the production of the vibration damping and soundproofing material of the present invention, since the low viscosity unvulcanized rubber emulsion and the high specific gravity filler are mixed, a large amount of the filler can be easily mixed.
In addition, by blending the water-crosslinkable urethane prepolymer, the mixed slurry of unvulcanized rubber and high specific gravity filler gels in a short time after molding and does not have fluidity. Excellent in performance. Therefore, molding into a thick molded body is easy, and processing such as molding can be performed without waiting for dry fixation, resulting in excellent productivity.
Further, CO ₂ is generated when the terminal NCO group of the urethane prepolymer reacts with water to form a crosslinked gel,
And, by forming the mixed slurry into a gel and then removing moisture, a molded body having a higher porosity can be obtained as compared with a molded body obtained by simply drying the mixed slurry of the filler and the rubber emulsion. it can.

[0041]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. The evaluation items in the examples of the present invention are as follows.

Damping Damping Property The lightweight floor impact noise level was evaluated by the reverberation room method.

Examples 1 to 6 and Comparative Example 1 described later
About the particle board laminated with the vibration damping and soundproofing material manufactured in Comparative Example 4, the thickness of the vibration damping and soundproofing material not to be laminated in Comparative Example 5, which will be described later, is 15 m so that the vibration damping and soundproofing material is on top.
As for the particle board of m, as the base material of the floor structure provided in the opening of 2m x 3m between the upper and lower reverberation rooms,
Each of them was applied, and then, on the vibration damping and soundproofing material (directly on the particle board of Comparative Example 5), thickness 6.
A 2 mm parquet flooring material was used together with an adhesive and nails to construct an evaluation floor. A shock from a tapping machine was applied to the above-mentioned floor for evaluation, and the noise level in the reverberation room on the lower floor was measured and evaluated relatively based on the following criteria.

◯: Good Noise level is 500 Hz
Less than 80db and 70d at 1000Hz
Less than b △: Slightly good Noise level is 80 at 500 Hz
Satisfying only one of the conditions of less than db or less than 70 db at 1000 Hz x: Poor 80 at a noise level of 500 Hz
Deformability of at least 70 db at 1000 Hz and after 1000 Hz The amount of permanent deformation after long-term compressive load loading was measured by the following procedure: Particles laminated with the vibration damping and soundproofing materials produced in Examples 1 to 6 and Comparative Examples 1 to 4. A parquet flooring material having a thickness of 6.2 mm was laminated on the upper surface of the board with an adhesive to form a floor for evaluation. 80 kg from the flooring material side to this evaluation floor through a steel compression jig with a diameter of 50 mm.
The compressive load was loaded for 500 hours, the difference between the thickness before loading and the thickness after loading was measured, and relatively evaluated according to the following criteria.

◯: Good Thickness difference is less than 0.2 mm Δ: Fairly good Thickness difference is 0.2 mm or more and 0.3 mm
Less than ×: defective Thickness difference of 0.3 mm or more (Example 1) In order to prepare a vibration damping and soundproofing material, the following high specific gravity filler, non-vulcanized rubber, urethane prepolymer, thickener, and plasticizer Was used.

The high specific gravity filler has a specific gravity of 4.6 and a particle size of 4
0 μm sand iron was used. As the non-vulcanized rubber, an emulsion having a specific gravity of 1.0 (solid content concentration = 48%), carboxy-modified styrene-butadiene rubber (SBR) (manufactured by Japan Synthetic Rubber Co., Ltd., JSR-0619) was used. In the urethane prepolymer, the isocyanate component is tolylene diisocyanate (TDI), and the polyol component is polyethylene glycol and polypropylene glycol in a molar ratio of 85:
A mixture containing 15 and a molecular weight distribution Mw = 320
A urethane prepolymer (0, Mn = 1200, Mw / Mn = 2.7, and specific gravity = 1.1, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., Monotac 305) was used. Thickener is methyl cellulose (MC) (produced by Shin-Etsu Chemical Co., Ltd., Metroze 9).
0SH30000) was used. As the plasticizer, dioctyl phthalate (DOP) contained in the urethane prepolymer in an amount of 13% by weight was used.

The above components were stirred and mixed in the proportions shown in Table 1 to prepare an aqueous slurry. Next, the urethane prepolymer was added to the above aqueous slurry at a ratio shown in Table 1 and mixed with stirring. The obtained mixture slurry is immediately applied to one side of a particle board having a size of 910 × 1800 mm and a thickness of 15 mm by using a mold so that the thickness after drying becomes 3 mm to form a laminate. did. The slurry applied and laminated was gelled due to crosslinking of the urethane prepolymer in about 2 minutes after addition of the urethane prepolymer and about 30 seconds after the slurry was applied, and became a gel state having no fluidity. Therefore, the mold was removed. Furthermore, the particle board coated with the slurry is about 50
It was dried for about 5 hours in a drying room at 0 ° C. to obtain a vibration damping and soundproofing floor material in which vibration damping and soundproofing materials were laminated. The characteristics of the obtained vibration damping and soundproofing materials are shown in Table 1.
Table 2 shows the results obtained by subjecting the vibration damping and soundproofing floor material to the above evaluations and.

(Examples 2 to 6) Vibration-damping and floor-proof materials were obtained in the same manner as in Example 1 except that the proportions shown in Table 1 were used. Table 1 shows the characteristics of the vibration damping and soundproofing material, and Table 2 shows the evaluation results of the vibration damping and soundproofing floor material.

That is, as the urethane prepolymer,
The isocyanate component is diphenylmethane diisocyanate (MDI) and the polyol component is polyethylene glycol and polypropylene glycol in a weight ratio of 8
The mixture contained at 6:14, Mw = 11.2 × 1
0 ³ , Mn = 4.8 × 10 ³ , and Mw / Mn = 2.3
A vibration-damping and sound-proofing floor material was obtained in the same manner as in Example 1 except that the urethane prepolymer (Polygram M.2, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) was used.

Comparative Example 1 A vibration damping and soundproofing material was obtained in the same manner as in Example 1 except that urethane was not added.
However, since the gelling step of the slurry is not used, the drying was performed with the mold attached to prevent the flow of the applied slurry, and the mold was removed after the drying. Table 1 shows the characteristics of the vibration damping and soundproofing material. Table 2 shows the evaluation results of the vibration damping and soundproofing floor material.

(Comparative Examples 2 to 4) Vibration-damping and floor-proof materials were obtained in the same manner as in Example 1 except that the proportions shown in Table 1 were used. Table 1 shows the characteristics of the vibration damping and soundproofing material. Table 2 shows the evaluation results of the vibration damping and soundproofing floor material.

(Comparative Example 5) Thickness of 15 used in Example 1
Only the mm particle board was subjected to the above evaluation. Table 2 shows the evaluation results.

[0053]

[Table 1]

[0054]

[Table 2]

As can be seen from Table 2, the vibration-damping and sound-insulating flooring material of the present invention is excellent in both vibration-damping cushioning property and deformability.

[0056]

EFFECTS OF THE INVENTION The vibration-damping and sound-proofing material and the vibration-damping and sound-proofing floor material of the present invention have excellent vibration-damping and sound-proofing properties, and are minimally deformed even when a load is applied to the floor for a long period of time. Furthermore, according to the method for manufacturing the vibration damping and soundproofing material of the present invention, since it is possible to fill the high specific gravity filling material at a high ratio, it is possible to obtain the vibration damping and soundproofing material having excellent vibration damping and soundproofing properties, and to relatively thicken the material. It is possible to manufacture vibration damping and soundproofing materials with high productivity.

[Brief description of drawings]

FIG. 1 is a diagram showing the preparation of an aqueous slurry in the method for producing a vibration damping and soundproofing material of the present invention.

FIG. 2 is a diagram showing up to the step of gelling an aqueous slurry in the method for producing a vibration damping and soundproofing material of the present invention.

FIG. 3 is a diagram showing a drying step in the method for manufacturing the vibration damping and soundproofing material of the present invention.

FIG. 4 is a diagram showing a method for cutting the vibration damping and soundproofing material of the present invention to a fixed length.

[Explanation of symbols]

 1 Mixing Tank 2 Stirring Blade 3 High Density Filler 4 Unvulcanized Rubber Emulsion 5 Water 6 Thickener 7 Aqueous Slurry 8 Pump Feeder 9 Static Mixer 10 Urethane Prepolymer 11 Coating Substrate 12 Coater 13 Conveyor 14 Gelled Slurry 15 Drying room 16 Damping and soundproofing material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08L 21/00 LBS E04B 1/86 A P G10K 11/162

Claims (3)

[Claims] 1. A filler having a high specific gravity of 85 to 99.5% by weight,
It is composed of 15 to 0.5% by weight of a binder component containing unvulcanized rubber and crosslinked urethane resin as main components, and the weight ratio of unvulcanized rubber: crosslinked urethane resin is 5: 1 to 0.5: 1. A vibration damping and soundproofing material having a porosity of 30% to 60%. 2. A vibration-damping and sound-insulating floor material obtained by laminating the vibration-damping and sound-proofing material according to claim 1 on a wood layer. 3. A method for producing a vibration damping and soundproofing material, which comprises the following steps: (A) mixing a high specific gravity filler and an aqueous slurry containing an emulsion of unvulcanized rubber; (B) A step of mixing a water-crosslinkable urethane prepolymer with the water-based slurry; (C) a step of shaping the water-based slurry containing the urethane prepolymer into a desired shape or applying it onto a substrate; (D) the water-crosslinking By cross-linking the urethane prepolymer
A method of gelling the aqueous slurry; and (E) drying and removing unnecessary water in the gelled slurry.