JPH0430508B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a damping floor member, and particularly to a damping floor member for direct attachment. Technological advances in this type of vibration-damping flooring materials have been remarkable in recent years, and it is said that the remaining issues in the architectural field are currently narrowing down to two issues: dew condensation and sound/vibration. There is.
In recent years, various countermeasures have been taken to address the problem of sound and vibration, and although improvements have been made, there are still many areas where sufficient effects cannot be achieved due to technical difficulties. Flooring materials are an example of this, and although various studies have been conducted, there is currently no material that exhibits good performance. In other words, among flooring materials, there are many residents who request wooden flooring because of its advantages such as being able to maintain cleanliness, being difficult for pests such as mold and mites to inhabit, and having a calm color tone. It has increased. However, the only disadvantage of wooden flooring is that it cannot at all reduce floor impact noise due to the sound of walking on the floor or the sound of objects falling, and considering the inconvenience to the people living downstairs, wooden flooring cannot be used upstairs. is the current situation. Against this background, the present inventors have conducted extensive research into flooring materials with excellent floor impact noise mitigation performance, and have found that by using the following members as floor construction materials, the floor impact noise mitigation effect is significantly improved. After confirming that this occurs, we have completed the present invention. The vibration damping floor member of the present invention utilizes the vibration damping properties of an air layer and a crosslinked viscoelastic body having excellent vibration damping properties and compression properties. As is conventionally known, it is known that floor impact noise can be easily alleviated by using a material that can be compressed and deformed easily even under small stress, such as felt. . On the other hand, materials with such performance undergo too large a compression deformation, so if a floor material that requires a smooth finish, such as a wooden floor, is used, distortion may occur even at the height of furniture, etc. This results in a fatal drawback that smoothness cannot be maintained. Therefore, the measures currently being taken to counter floor impact noise are compressed glass wool,
The floor is constructed by combining several types of asbestos, century board, rubber board, inorganic board materials, plywood, etc., or by raising the combination from the floor slab, and also by putting sound-absorbing material in the space between the floor slab and ceiling. ,
In some cases, the current practice is to use anti-vibration rubber as a suspended ceiling to reduce floor impact noise through the overall effect of the floor and ceiling. However, the method requires a large number of raw materials and high raw material costs. There is a lot of material loss during construction. The cost increases due to the large number of construction steps. In addition, the total thickness of the floor members for alleviating floor impact noise becomes extremely thick, and if buildings are kept at the same eave height, the living space must be made narrower or the number of floors must be reduced. On the other hand, if buildings have the same number of floors and the same living space, the disadvantage is that the increased height of the eaves will add to the construction cost of the building. The present inventors solved the above-mentioned drawbacks,
Many trials have been conducted with the goal of creating a restraining type vibration-damping flooring material for direct attachment that can reduce floor impact noise at low cost, is thin, and can be applied directly, even when finished with wood flooring. After repeated mistakes, we discovered that liquid rubber, which can be reacted at room temperature to form a crosslinked viscoelastic material, and a film base material with air-enclosed parts both have excellent floor impact sound mitigation performance when used alone. In this case, the present invention was found to not only exhibit the ability to further reduce floor impact noise, but also eliminate the drawbacks when used alone, and as a result of various tests, the present invention was completed. In other words, when liquid rubber is used alone to obtain a crosslinked viscoelastic body through room-temperature reaction, it is expensive and unsuitable for general-purpose flooring, and when reacted between plate-shaped restraining materials, However, unless a large amount of material is used and a method is used to extrude the excess material, large cavities are likely to be created randomly, resulting in product variations.
In addition, if a plate-shaped body is made in advance and pasted, the thickness accuracy will be insufficient unless it is of a standard size, and since it is a cross-linked viscoelastic body, blocking (block-like hardness) may occur. etc., and the number of man-hours required for bonding increases significantly, resulting in high costs. On the other hand, when using a film base material with an air-enclosed portion alone, if there is no material to protect the convex thin film, the film will easily break if pressure is applied locally, and it may become a part of the flooring material. It has the disadvantage that it is not a material that can be used in layered form. Furthermore, among film base materials, those covered with a thin film not only on one side but also on both sides have a slightly higher load capacity than single-sided film products, but are not materials that can be used in a layered manner as flooring materials. Also, plastic cardboard with enclosed air is known, but those with increased surface film thickness and overall rigidity buckle under unexpectedly small stress when a compressive load is applied, and are unable to recover. Not only does it have a fatal drawback as a flooring material, it also has a disadvantage of poor floor impact noise mitigation performance. In order to eliminate the above disadvantages, if a polyolefin foam sheet is pasted on one or both sides, the floor impact sound mitigation performance will be improved, but if plastic cardboard with enclosed air is used, or if it is not used. There is no difference between the two cases, and even during compression, if the deformation limit of the polyolefin foam sheet is exceeded, it will buckle and will not restore its original shape, as in the case where the polyolefin foam sheet is not laminated. After repeated trial and error in order to solve both of the above-mentioned drawbacks, the present inventors applied a liquid rubber capable of obtaining a crosslinked viscoelastic body by reaction at room temperature to the surface of at least the concave portion of a film base material having an air-enclosed portion. It was discovered that by filling this material with carbon dioxide, it is possible to obtain a floor material with excellent floor impact sound mitigation performance and very good compression properties as a floor material. Filling the surface of the film base material that includes at least the concave portions means that the crosslinked viscoelastic material 5 is filled only in the concave portions of the film base material shown in FIG. 1, and the case shown in FIG. This figure shows the case where the filler is filled up to the upper part of the convex part. The restraint type is the name used for the method of using damping material, and as shown in Figures 1 to 3, when trying to dampen vibrations on a vibrating plate, the damping material and a plate-like object are used. The adhesive force of the vibration damping material itself is used to create a shear stress between the damping material and the plate-like object added later (since both the plate-like objects are bonded together, one of the plate-like objects vibrates). The other plate also vibrates via the damping layer. However, due to the rigidity of the plate, the damping layer receives shear stress and acts in the direction of stopping the vibration.) It can be attenuated. This type of sanderch structure is called a constrained type. Regarding Figure 1, the plywood 2 is placed on top of the damping material 4.
is pasted as the upper restraining material, and plywood 6 is the lower restraining material or substrate, and Fig. 1 shows the state where the board is stationary. Transmitted vibration (curvature)
Then, this vibration is transmitted to the plywood 6 serving as the lower restraint material through the vibration damping material 5, and the lower restraint material (substrate) is restrained so as to suppress vibration. Further, vibrations are transmitted from the substrate (lower restraining material) side to the plywood 2 serving as the upper restraining material via the vibration damping material 5, and the plywood 2 is restrained so as to suppress the vibration. Therefore, the upper restraining member 2 and the lower restraining member 6, which are plate-like members that sandwich the vibration damping plate 4, each have a restraining action to suppress the vibrations of the other. In other words, the reason for the excellent floor impact sound mitigation performance is that the air sealing part becomes an air bag and is easily compressed and deformed, and the viscoelastic material filled in the recess adheres to the unevenness of the film base material, making the displacement at the time of impact complicated. In addition to the impact energy absorption performance of the viscoelastic body itself,
By increasing the deformation of the convex part of the film that forms the air bag and the shear deformation part with the crosslinked viscoelastic body,
This is thought to be due to improved impact energy absorption performance. In addition, in terms of compression characteristics, when an impact is applied, the air bladder, which is a convex part of the film, is compressed, and the viscoelastic body is further compressed, so it easily deforms with a very small displacement, but under a constant load. For the above compression, the reaction force of the compressed air in the convex air bag,
Since the compressive reaction force of the crosslinked viscoelastic body acts and a larger force is required to increase the deformation, more displacement than necessary can be avoided.
Furthermore, when the compressive load is removed, the restoring force of the cross-linked viscoelastic body and the restoring force of the compressed convex air bladders are combined, resulting in a very quick recovery force. It was done. Furthermore, even though it is a crosslinked material, crosslinked viscoelastic materials tend to be susceptible to changes in hardness due to temperature changes, but at high temperatures, air expansion can suppress the decrease in compressive force due to the decrease in hardness of the viscoelastic material. On the other hand, at low temperatures, air contraction can suppress the increase in compressive strength due to increased hardness of the viscoelastic body, and it also has the advantage of being used as a vibration damping floor member in that it reduces changes in performance due to temperature changes. In addition, in terms of cost, since one side is a film, handling work is very easy, and long length processing is also possible, which not only greatly reduces the number of man-hours, but also reduces the number of convex parts. Since the air sealing part does not require any material, it is possible to reduce the amount of material, which is suitable for cost reduction. Next, the cross-sectional structure of a floor using the restraint-type damping floor member for direct attachment of the present invention will be described. As shown in Figures 1 and 4, there is a method in which a relatively rigid plate-like body is used as a restraining material by adhering a hollow film with a crosslinked viscoelastic body, and as shown in Figure 2, Either of the methods of using a film base material filled with an elastic body and a relatively rigid plate-like body as a restraining material may be used, and in some cases, the film base material may be directly bonded to the floor slab as shown in It's okay. In addition, there is no problem whether the film base material with a crosslinked viscoelastic material is used with the film surface as the top surface or as the bottom surface. Next, the floor components will be explained step by step. Examples of finishing materials include wood floor finishing materials, vinyl chloride floor finishing materials, and cork tiles, which are currently used as floor finishing materials. Wooden flooring materials include flooring boards, flooring blocks, single-layer flooring made of mosaic parquet, natural wood decorative composite flooring, specially processed decorative composite flooring, natural wood decorative composite blocks, composite flooring made of specially processed decorative composite blocks, and sawn wood flooring. Examples include flooring made of boards, boards, cork, and laminated layers. .
For these, it is preferable to make the plate layer thinner in order to alleviate floor impact noise. Specific examples of the restraining material include the above-mentioned wooden flooring material, plywood, compressed paper, plastic sheet metal sheet, particle board, wood chip cement board, fiber board, pulp cement board, wood wool cement board, flexible board, and soft flexible board. , large flat plates, asbestos-cement boards, asbestos-cement perlite boards, asbestos-cement calcium silicate boards, plaster boards, etc. As long as these are plate-like, they can be used regardless of whether or not the surface has decorative processing or holes. Although it can be used, if the purpose is to reduce the total thickness of the floor component, a thinner plate is preferable.
In addition, as a restraining material, vulcanized rubber, non-vulcanized rubber, vinyl chloride, polyethylene, polypropylene, nylon, polyester, vinylidene chloride, ethylene-
Examples include films and sheets made of vinyl acetate copolymers and the like. Specific examples of cloth-like base materials include nylon, polyester, polypropylene,
Examples include non-woven fabrics using polyethylene and glass fibers, and fabrics made of natural fibers such as cotton and hemp and/or synthetic fibers such as nylon, urethane, polypropylene, acrylic and polyester.
When using fibers, it is desirable to use fibers as long and as thin as possible in order to reduce compression strain. Next, the crosslinked viscoelastic material will be explained. The cross-linked viscoelastic material referred to in the present invention is liquid at room temperature, and after reacting at room temperature, the cured product retains its shape even when heated to 80°C, and has a hardness of Nippon Rubber at 20°C. It satisfies the condition of being 50 or less on the C-type hardness tester specified in the association standard SRIS-0101. Reactive substances that can satisfy the above conditions include:
Combinations of liquid rubbers having functional groups and crosslinking agents shown in Table 1 can be exemplified.

[Table] Considering the ease of controlling the curing rate, cost, and availability of room-temperature reactivity, these products have a hydroxyl group at the end, the main chain is polybutadiene, hydrogenated Polybutadiene, polybutadiene-nitrile, polybutadiene-styrene, isoprene, etc., polyether polyol,
It is desirable to use polyester polyols, urethane acrylic polyols, aniline derivative polyols, etc. alone or in combination. Further, as the curing agent for the above-mentioned reactive substance, an isocyanate-based curing agent is suitable, and it is necessary that the curing agent has two or more isocyanate groups per molecule. Specific examples include toluylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate,
Examples include prepolymers having terminal isocyanate groups, which can be used alone or in combination. Also, isocyanate curing agents can be used in combination with plasticizers due to problems such as blending ratio and/or viscosity, but the plasticizers must be dehydrated and do not react with isocyanate compounds. It is. Although it is possible to obtain a crosslinked viscoelastic material that satisfies the present invention by combining only the essential components required to cause the room-temperature reaction described above, various additives may be added in order to improve cost, workability, and physical properties. By adding it, a wide range of stable crosslinked viscoelastic substances can be obtained. Examples of additives include plasticizers, fillers, bituminous substances, tackifying resins, antiaging agents, antifungal agents, flame retardants, catalysts, surfactants, coupling agents, and the like. The plasticizer is blended for the purpose of adjusting viscosity, adjusting workability, adjusting the substance of the crosslinked viscoelastic body, imparting flame retardance, and the like. Specific examples of plasticizers include naphthenic oil, paraffinic oil, amarotic oil, castor oil, cottonseed oil, pine oil, tall oil, phthalic acid derivatives, isophthalic acid derivatives, adipic acid derivatives, areic acid derivatives, and functional groups of liquid rubber. There are some that do not contain , and they can be used alone or in combination. When flame retardancy is required, halogen compound-based or phosphorus compound-based plasticizers can be used alone or in combination. Bituminous materials include straight asphalt, blown asphalt, and tar.
In order to obtain a desired crosslinked viscoelastic body, it can be used after being modified with a tackifying resin, a plasticizer, etc. in advance. Tackifier resins include natural resins, rosins, modified rosins, derivatives of rosins and modified rosins, polyterpene resins, modified terpenes, aliphatic hydrocarbon resins, cyclopentadiene resins, aromatic petroleum resins, phenolic resins, Alkylphenol - acetylene resin, xylene resin, coumaron -
Indene resin, vinyltoluene-α-methylstyrene copolymer, etc. can be used alone or in combination. Fillers have the potential to improve vibration damping, sound insulation, and flame retardancy, and can be used to adjust the blending ratio of the main agent/curing agent.
It is used for the purpose of adjusting viscosity and reducing compounding costs, and those commonly used in rubber and paints can be used. Specific examples include mica, graphite,
General-purpose fillings such as scale-like inorganic powders such as vermiculite, talc, and clay, high-density fillers such as ferrite, metal powder, barium sulfate, and lithopone, calcium carbonate, finely divided silica, carbon, magnesium carbonate, aluminum hydroxide, and asbestos. Agents can be used alone or in combination. Moreover, antimony trioxide, borax, etc. can also be used for the purpose of flame retardation. Other additives include anti-aging agents, catalysts, pigments, surfactants, coupling agents, antifungal agents, etc., and these can be added as necessary. Next, the air-filled film base material filled with the crosslinked viscoelastic material refers to a film base material having alternately air-filled convex portions and film-only recessed portions.
The figure shows a perspective view of an example of an embodiment filled with a crosslinked viscoelastic material. As the air-filled film base material, general-purpose products conventionally used as packaging materials are sufficient.
The ratio of the air volume of the hollow convex portion to the volume of the crosslinked viscoelastic material filled in the concave portions of the film alone is preferably a ratio of convex portions: concave portions = 2:8 to 8:2; concave portions: convex portions. When the number of convex portions is less than 2:8, the cost of raw materials increases and the restorability tends to deteriorate. On the other hand, if the number of convex portions increases from a ratio of convex portions to concave portions of 8:2, although the cost of raw materials decreases, there is a tendency that the risk of destruction of the air bag increases and the restorability tends to deteriorate. Further, the thickness of the film constituting the air enclosing portion is preferably about 20μ to 100μ. Further, the height of the convex portion is preferably 6 mm or less, and a more preferable range is 2 mm to 4 mm. Further, the volume of air per one convex portion is desirably 10 c.c. or less, and a more preferable range is 0.3 to 5 c.c. Furthermore, the crosslinked viscoelastic material to be filled may be in a state where it is filled on top of the convex part, but considering the cost, it is better that the part filled above the convex part is 1 mm or less. . On the other hand, if the filling height is less than 3/4 of the height of the convex part, it is not desirable because unless it is compressed from the beginning, the adhesion effect with the restraining material cannot be achieved and the adhesive strength is likely to be insufficient. . In addition, the materials that make up the film include polyethylene, polypropylene, nylon, polyester,
Films made of vinyl chloride, vinylidene chloride, etc. can be used, among which polyethylene and polypropylene have the advantage of being easily available as general-purpose products, and vinylidene chloride is a preferred material because it has excellent gas permeation resistance. Further, the shape of the air-filled convex portion may be any shape such as a columnar shape, a prismatic shape, a semicircular shape, or an elliptical shape. Next, the present invention will be explained with reference to Examples and Comparative Examples. These are summarized in the table.

【table】

[Table] (1) A base material was prepared according to the formulation examples shown in Examples and Comparative Examples, a prescribed curing agent was added and mixed, and the mixture was filled into a film base material having the indicated volume ratio of convex portions to concave portions. After crosslinking, a crosslinked viscoelastic film was obtained. Regarding Comparative Example 1, it was prepared at 100°C according to the formulation example, heated and melted at 90°C, and filled into a film base material having the indicated volume ratio of convex parts to concave parts. I got a body film. One side of the film obtained as above was
Glue it to mm thick wood veneer flooring material, glue the remaining one side to 2.5 mm thick plywood, and glue 2.
A sample of foamed polyethylene with a thickness of mm was laminated to measure the floor impact sound. However, in Example 3, a 2.5 mm thick plywood board was laminated to the 55 ^t thick wood veneer floor material, a 4 mm thick crosslinked viscoelastic film obtained by the above method was laminated, and a 2 mm thick foamed polyethylene film was laminated. They were pasted together to form a measurement sample. (2) Mix the main ingredient of the viscoelastic compound obtained in the same manner as in (1) above and a curing agent at a predetermined ratio, and form a 12 mm x 50 mm
It was poured into a formwork with dimensions of 50 mm and used as a sample for hardness measurement. After culturing at room temperature for 7 days and at 50°C for 7 days, the hardness was measured using a C-type hardness meter specified in the Japan Rubber Association standard SRIS-0101. (3) 12mm x 50mm x 50mm obtained in the same way as hardness measurement
Apply release paper to the crosslinked viscoelastic material surface of the sample,
After applying a load of 500 g and allowing it to stand at 80°C for 24 hours, it was unloaded, left to stand at room temperature, and was visually judged based on the magnitude of deformation after 4 hours. Edges forming corners and ridges of the crosslinked viscoelastic material are also marked with a mark ◯ if the edges are sharp and have little deformation, and cases where the edges are not sharp or have large deformation are marked with an x. (4) To measure the floor impact sound, the sample prepared in (1) above was stored on a 150 mm thick RC slab, and the light impact sound was measured using a tapping machine. The measurement method was in accordance with JIS-A-1418, as shown in FIG. The results were shown in terms of floor impact sound insulation grade. (5) Restorability The 4 mm thick crosslinked adhesive film base material obtained in (2) above was prepared, and the dimensions of 4 mm x 50 mm x 50 mm were
It was laminated onto plywood boards weighing 2.5 ^tons each on the top and bottom, and was compressed by 50% at a compression speed of 2 mm/min using a compression testing machine. After holding for 30 minutes, the load was unloaded and the resilience was checked after 10 minutes. Those that showed recovery of 95% or more are marked with ○, 95%.
The following items are marked with an x. (6) The relationship between compressive stress and displacement of a single air-filled film and a film with a cross-linked viscoelastic material was measured using a compression tester at a compression speed of 2 mm/min.
The displacement and compressive stress were read from the obtained chart and graphed (see Figure 7). From the above, Example 1 is a case in which the direct bonding restraining type vibration damping floor member of the present invention is applied as a restraining layer using a wooden floor finishing material and plywood, and exhibits good floor impact sound insulation properties and compression recovery properties. ing. Example 2 is a case where the crosslinked viscoelastic material was changed from the hydroxyl-terminated liquid polybutadiene of Example 1 to urethane. It shows good floor impact sound insulation and compression recovery properties. Example 3 is a case where the floor configuration is changed from Example 1. This is a case where the upper surface restraining material of a film base material with a crosslinked viscoelastic body is 2.5 ^t thick plywood, and the lower surface restraining material is a film base material. This example also shows that the floor has an excellent effect of alleviating floor impact noise and has excellent compression and recovery properties. Comparative Example 1 is a case where the viscoelastic body is not crosslinked, and shows a case where the viscoelastic body is filled with a hot melt viscoelastic body. It not only has poor floor impact sound mitigation ability, but also has large compressive strain, making it unsuitable as a flooring material. Comparative Example 2 shows a case where the hardness of the viscoelastic body is 60 in type C defined in SRIS-0101.
The object of the present invention cannot be achieved due to poor floor impact sound mitigation ability. Comparative Example 3 shows a case where the volume ratio of the convex portions to the concave portions of the film base material was 1:9. This is not preferable in achieving the present invention because the restorability is slightly inferior and the material cost is high. Comparative Example 4 shows a case where the volume ratio of the convex portions to the concave portions of the film base material was 9:1. This is not preferred because it has poor restorability and there is a high risk if the air bladder in the convex portion of the film base should break. The graph shown in Figure 6 compares the air-filled film base material alone and the film base material with cross-linked viscoelastic material. This shows that it is necessary to add large compressive strength to provide displacement. In other words, it can be said that it has ideal compression characteristics as a floor material for mitigating floor impact noise. As described above, according to the present invention, the vibration damping performance of the constrained vibration damping material can be further improved by utilizing the compression characteristics of the enclosed air layer and the compression characteristics of the crosslinked viscoelastic body, and by increasing the adhesion surface area due to the complex shape. It can be performed efficiently. By replacing part of the crosslinked viscoelastic material of the raw material with an air layer in the convex portion of the film, it has become possible to reduce costs. Keeping the total thickness of vibration damping floor members thin,
It is possible to suppress the height of the building's eaves, which has a great effect on lowering construction costs. In addition, the blocking effect can be utilized by the air layer in the convex portion of the film. The present invention, which provides the above-mentioned merits and enables a wood flooring finish that has been more highly desired than before at a low cost, has great industrial utility value.

[Brief explanation of drawings]

FIG. 1 shows a construction cross section of an example product of the present invention, and is an example in which plate-like restraining materials are applied on the upper and lower sides. FIG. 2 similarly shows a construction cross section of an example product of the present invention, in which the finishing material is the upper restraining material,
This is an example in which the lower restraining material is an air-filled film base material. FIG. 3 similarly shows a construction cross section of an example product of the present invention, in which the finishing material is the upper restraining material,
This is an example in which the lower restraining material is a floor slab. FIG. 4 similarly shows a construction cross section of an example product of the present invention, and is an example in which the upper restraining material is used as the finishing material and the plate-shaped restraining material is used as the lower restraining material. FIG. 5 is a perspective view showing an example of the restraint-type damping floor member for direct attachment of the present invention, and FIG. 6 is an explanatory diagram showing an apparatus for measuring floor impact sound. FIG. 7 is a diagram showing compression characteristics with and without a crosslinked viscoelastic body according to the present invention. 1...Wood flooring, 2...Plywood (upper restraining material), 3...Air layer, 4...Film, 5...
Crosslinked viscoelastic body, 6... plywood (lower restraint material), 7...
...Foamed polyethylene (uneven absorbing material), 8...Floor slab, 9...Sound source room, 10...Tapping machine, 11...Sample, 12...Floor slab, 13...
Sound receiving room, 14...Microphone, 15...Precision sound level meter, 16...Frequency analyzer, 17...Level recorder.

Claims (1)

[Scope of Claims] 1. In a constraint-type vibration damping floor member for direct attachment, a film base material in which convex portions filled with air and concave portions made only of film are arranged alternately, on a surface including at least the concave portions, The curing reaction takes place at room temperature, and the product after the curing reaction retains its shape even when heated to 80°C.
The hardness under the conditions of °C is the Japan Rubber Association standard SRIS-
3, which is 50 or less on the C type hardness tester specified in 0101
An air-filled film with a cross-linked viscoelastic body formed of a cross-linked viscoelastic body that satisfies the following conditions is used as one member of the floor constituent member, and the air-filled film with the cross-linked viscoelastic body is formed as one member of the floor constituent member, and the air-filled film with the cross-linked viscoelastic body is formed as a member of the floor constituent member that is adjacent to the above and below, or the floor constituent member that is adjacent to the above A constraint-type vibration-damping floor member for direct attachment, characterized by using an air-filled film base material as a vibration-damping constraint material. 2. The ratio of the volume of air in the convex portion containing air to the volume of the crosslinked viscoelastic material filled in the concave portion of the film alone is convex portion:concave portion = 2:8 to 8:2, and Cured with a height of 6 mm or less, and a crosslinked viscoelastic body filled at least on the surface including the recesses, which has a main component consisting of a telechelic polymer having a hydroxyl group at the end and two or more isocyanate groups per molecule. 2. The restraint-type vibration damping floor member for direct attachment according to claim 1, which is obtained by subjecting the material to a curing reaction at room temperature. 3. The crosslinked viscoelastic material that fills at least the surface including the concave portions of the film base material, in which convex portions containing air and concave portions containing only the film are arranged alternately, is made of hydroxyl-terminated liquid polybutadiene, asphalt, and plasticizer. The direct adhesive according to claim 1, which is obtained by causing a curing reaction at room temperature between a main ingredient having as a basic component and a curing agent having two or more isocyanate groups per molecule. Restraint type vibration damping floor member. 4. A restraining type vibration damping floor for direct attachment according to claim 3, characterized in that a film base material with a cross-linked viscoelastic body is integrated with a wood finished flooring material or a wood board material as a vibration damping restraint material. Element.