JPH0366835A - Vibration isolating method - Google Patents

Abstract

PURPOSE:To prevent a building from transmission of the vibration conducted over the land surface or underground simply by filling an underground trench provided between the building and a vibration motive with a liquid polymer resin compound such as liquid diene polymers containing hydroxyl radical, and by allowing it to harden. CONSTITUTION:An underground trench provided between building and a vibration motive is filled with the liquid polymer resin compound consisting of liquid diene polymer containing hydroxyl radical or its hydroxide or spread oil or hollow filler. Otherwise is used a liquid compound mainly containing such water absorptive resin as acrylic acid polymer and water, which shall then be hardened. The compound is turned into gel by the use of spread oil to damp the vibration, or the same is achieved with hollow independent bubbles by the use of hollow filler. Thereby the building is simply prevented from transmission of the vibration conducted on the land surface or underground to ensure that the vibration isolating performance is exerted as stabilized secularly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibration isolation method that is effective in preventing vibration pollution caused by civil engineering and construction, etc., or traffic vibration pollution caused by automobiles, etc.

[Problems to be solved by conventional technology and inventions] Conventionally, vibrations caused by traffic vehicles such as cars and trains, construction work, factories, etc. propagate through the ground surface and underground, reaching buildings such as private houses, and causing damage to the health of residents. So-called vibration pollution, which harms the psyche, has become a social problem.

Conventionally, as measures to prevent these vibrations, concrete,
Methods such as burying steel sheet piles underground, or installing cured urethane, urethane foam, etc. underground as vibration isolating materials have been used.

However, burying concrete, steel sheet piles, etc. requires large-scale construction work, and these materials are harder than the ground that propagates vibrations, so even if they are used as underground vibration-proofing materials, their effectiveness is small. There are drawbacks.

On the other hand, vibration damping materials using cured urethane or urethane foam have a large vibration damping effect because they are softer than the ground, and are simple methods because they can be constructed using methods such as pouring. Since polyols are used, they are susceptible to hydrolysis due to underground moisture, acids, alkalis, etc., and have drawbacks such as the inability to obtain permanent and stable vibration damping performance.

The present invention solves the above-mentioned conventional drawbacks, and easily and effectively prevents vibrations propagating on the ground surface or underground from being transmitted to buildings, etc.
Moreover, it is an object of the present invention to provide a method that can permanently exhibit stable vibration damping performance.

That is, the present invention involves filling an underground trench with a liquid polymer resin composition consisting of (A) a hydroxyl group-containing liquid diene polymer or its hydride, (B) a polyisocyanate compound, and CC) an extender oil or a hollow filler, and curing the liquid polymer resin composition. The present invention provides a vibration isolating method characterized by filling an underground trench with a liquid composition containing a water-absorbing resin and water as main components.

In the first aspect of the present invention, a liquid polymer resin composition comprising (A) a hydroxyl group-containing liquid diene polymer or a hydride thereof, (B) a polyisocyanate compound, and (C) an extender oil or a hollow filler is prepared as described above. use

The hydroxyl group-containing liquid diene polymer used here as component (A) has a number average molecular weight of 300 to 25,000. Preferably 5
00 to 10,000 liquid diene polymer.

Here, the content of hydroxyl groups is usually 0.1 to 10 meq/g
, preferably 0.3 to 7 meq/g.

Examples of the liquid diene polymer include diene polymers and diene copolymers having 4 to 12 carbon atoms, and copolymers of these diene monomers and α-olefinic addition polymerizable monomers having 2 to 22 carbon atoms. be. Specifically, examples include butadiene homopolymer, isoprene homopolymer, butadiene-styrene copolymer, chloroprene homopolymer, butadiene-isoprene copolymer, butadiene-acrylonitrile copolymer, butadiene-2-ethylhexyl acrylate copolymer, butadiene-n-octadecyl acrylate copolymer, etc. I can do it. These liquid diene polymers can be produced, for example, by subjecting a conjugated diene monomer to a heating reaction in the presence of hydrogen peroxide in a liquid reaction medium.

Moreover, as component (A) in the present invention, a hydride thereof can also be used instead of the hydroxyl group-containing liquid diene polymer. The hydrogenated product of the hydroxyl group-containing liquid diene polymer is prepared by dissolving the hydroxyl group-containing liquid diene polymer in a solvent and heating the mixture at a temperature of 20 to 300 m in the presence of a known hydrogenation catalyst such as nickel, palladium, ruthenium, or platinum. 'C
1 Preferably at 30-200°C, hydrogen pressure O
~200 kg/cnt G, preferably 0-10
It can be produced by reacting at 0 kg/c PoG for 0.1 to 10 hours.

After the reaction is completed, the catalyst is filtered off and the solution is distilled under reduced pressure to remove the solvent and obtain a hydride of a hydroxyl group-containing liquid diene polymer. The hydrogenated product of this hydroxyl group-containing liquid diene polymer has a number average molecular weight of 300 to 2,500.
0, preferably 500 to 1oooo, and the hydroxyl group content is 0.1 to 10 meq/g, preferably 0.3 to 7
meq/g is desirable.

Next, the polyisocyanate compound used as component (B) is an organic compound having two or more isocyanate groups in one molecule, and is an isocyanate group that is reactive with the hydroxyl group of the hydroxyl group-containing liquid diene polymer. It has the following.

Examples of this polyisocyanate compound include the usual aromatic, aliphatic and cycloaliphatic ones,
For example, tolylene diisocyanate (TDI), hexamethylene diisocyanate.

Diphenylmethane diisocyanate (MDI) Carbodiimide modified diphenylmethane diisocyanate Polymethylene polyphenylisocyanate, Xylylene diisocyanate (XDI), Transcyclohexane-1
, 4-diisocyanate, phenylene diisocyanate, naphthalene-1,5-diisocyanate), o-1-luidine diisocyanate, lysine diisocyanate, triphenylmethane triisocyanate, tris(isocyanate phenyl)thiophosphate, tetramethylxylene diisocyanate, lysine ester triisocyanate Isocyanate, L6,11-undecane triisocyanate,
1,8-diisocyanate 4-isocyanate methyl octane, 1,3.6-hexamethylene triisocyanate, bicyclohebutane triisocyanate, isobrobylbenzene-2,4-diisocyanate, trimethylhexamethylene diisocyanate, isophorone diisocyanate) ( IPDI), hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate, cyclized trimer of the above polyisocyanate compound (isocyanurate modified product), ethylene glycol, trimethylolpropane, polyether polyol, polymer polyol, polytetramethylene ether glycol , polyester polyols, acrylic polyols, polyalkadiene polyols, partially oxidized ethylene-vinyl acetate copolymers, castor oil polyols, and other addition reaction products of the polyisocyanate compounds. Particularly preferred are MDI, carbodiimide-modified diphenylmethane diisocyanate), and TDI. In addition, these polyisocyanate compounds can be used as a mixture of two or more types, and further, so-called blocked isocyanate compounds in which the isocyanate groups of these polyisocyanate compounds are blocked with a blocking agent such as phenol, xylenol, methyl ethyl ketone oxime, ε-caprolactam, etc. can also be used.

Further, as these polyisocyanate compounds, a prepolymer obtained by blending an excess polyisocyanate compound with a hydroxyl group-containing liquid diene polymer can also be used.

There is no particular restriction on the blending ratio of the (^) hydroxyl group-containing liquid diene polymer or its hydride and the (B) polyisocyanate compound, but usually (A) the hydroxyl group-containing liquid diene polymer or its hydrogen. Hydroxyl group of compound (
The molar ratio (NCOloH) of isocyanate, 1 (NC○) of the polyisocyanate compound (B) to OH) is 0.5 to 25, preferably 0.5 to 15.

Furthermore, in the first aspect of the present invention, extender oil or hollow filler is used as component (C).

That is, by using extender oil, the composition is gelatinized to damp vibrations, or by using hollow fillers, vibrations are damped by hollow closed cells.

Specifically, as the extender oil, for example, aroma oil, naphthenic oil, paraffin oil, etc., and a plasticizer such as dioctyl phthalate (DOP) can be used.

The blending ratio of this extender oil is usually 50 to 100 parts by weight based on 100 parts by weight of the hydroxyl group-containing liquid diene polymer (A).
0 parts by weight, preferably 50 to 500 parts by weight. If the blending ratio of extender oil is less than 50 parts by weight, the cured product will not be sufficiently cured, which is not preferable. On the other hand, if the blending ratio of the extender oil exceeds 500 parts by weight, the IJ-out and physical properties of the oil from the cured product will deteriorate, which is undesirable (1).

In addition, as a hollow filler, an average particle diameter of 10 to 300
A hollow sphere with a diameter of 1 μm, preferably 20 to 200 μm, is used.

Specific examples of such hollow fillers include those made of glass, silica, phenol resin, epoxy resin, thermoplastic resin, and the like.

The proportion of this hollow filler is usually 0.1 parts by weight based on 100 parts by weight of the (c) hydroxyl group-containing liquid diene polymer.
~40 parts by weight, preferably 1 to 20 parts by weight. If the proportion of the hollow filler is less than 0.1 parts by weight, the cured product will not form sufficient closed cells, which is not preferable.

- If the blending ratio of the hollow filler exceeds 40 parts by weight, it is not preferable because a good cured product cannot be obtained.

The liquid polymer composition in the first aspect of the present invention is the above (A)
, (B), and (C), but a curing accelerator can also be added.

Here, specific examples of the curing accelerator include dibutyltin dilaurate, stannous octoate, and polyethylene diamine.

The liquid polymer composition in the first aspect of the present invention further contains an alkylphenol resin or a terpene resin, if desired, in order to adjust adhesive strength and adhesive strength.

Add tackifying resins such as terpene phenolic resins, xylene formaldehyde resins, rosins, hydrogenated rosins, coumaron resins, aliphatic and aromatic petroleum resins, and even add anti-aging agents for improved weather resistance, flame retardant Red phosphorus, hexabromobenzene, etc. can be added as an imparting agent.

The liquid polymer composition in the first aspect of the present invention is obtained by blending and mixing the above components. As a method for preparing a liquid polymer composition, first, the above components except for the polyisocyanate compound are blended, and 15 to 12
Stir and mix at 0°C 1, preferably 20-100"C for 5-240 minutes, preferably 20-180 minutes, then add the polyisocyanate compound to this mixture and mix at 0-7
0″C1 preferably 0.5 seconds to 18 at 15 to 50°C
A liquid polymer composition is obtained with stirring for 0 minutes, preferably 0.7 to 120 minutes.

In the first aspect of the present invention, the liquid polymer composition thus obtained is filled into an underground trench and allowed to harden.

Here, an underground trench is installed between a building, etc. to be vibration-proofed and a vibration source, and is installed around the building, etc. to be vibration-proofed (
It is installed by digging in some or all of the parts.

These underground trenches have various widths and depths depending on the desired vibration isolation performance, but are usually 0.1 to 0.5 m wide and 0.5 m deep.
A length of 5 to 5.0 m is desirable.

Although there is no particular restriction on the shape of the groove, it is sufficient that the amount of excavated soil has a simple rectangular cross section.

Although such an underground trench is filled with the liquid polymer composition, it is not necessary to fill the entire underground trench.

Next, the liquid polymer composition is cured, but the conditions in this case are not particularly limited, and are usually O~120'C,
It is preferable to hold the temperature at 15 to 70"C for 0.5 to 75 hours, preferably 1 to 72 hours. Therefore, it can be sufficiently cured by leaving it at room temperature (about 24 hours). The material cured in this way may be buried in an underground trench.

Next, in the second aspect of the present invention, a liquid composition containing a water-absorbing resin and water as main components is used, and this liquid composition is filled into an underground trench.

Examples of the water-absorbing resin used here include acrylic acid polymers, acrylic acid acrylic acid copolymers, etc., and acrylic acid polymers are particularly preferred.

The construction method using water-absorbing resin is to apply 1 to 5 to an appropriate amount of water-absorbing resin.
An underground trench may be filled with a liquid composition obtained by adding 0 times as much water and stirring at 0 to 70°C for 1 to 120 minutes.

In addition to the above method, an underground trench may be filled with a water-absorbing resin in advance, water may be added thereto, and the mixture may be stirred and mixed inside the trench.

Note that the width, depth, shape, etc. of the underground trench are the same as those described in the first aspect of the present invention.

〔Example] Next, the present invention will be explained by examples.

Production Examples 1 to 2 (Production of liquid polymer composition) The components shown in Table 1, excluding the polyisocyanate compound, were stirred and mixed at 25°C for 30 minutes, and then the polyisocyanate compound was added. The mixture was further stirred and mixed at 25°C for 1 minute to obtain a liquid polymer composition.

Production Example 3 (Production of liquid composition) The components shown in Table 1 were stirred and mixed at 25°C for 30 minutes to obtain a liquid composition.

/ Table 1: Manufactured by Idemitsu Atochem ■, R-45) IT (Number average molecular weight 2800. Hydroxyl group content iL 0.79 meq/g) *2
: Manufactured by Nippon Polyurethane ■, Millionate MTL (liquid modified, isocyanine) group content 29.0% by weight)*3
: Naphthenic process oil, manufactured by Idemitsu Kosan,
NS-100*4 Rainbow type hollow IC rune, Asahi Glass■
Manufactured by Q-CEL200*5 Nidibutyltin dilaurate *6; Poly 177 + JB water absorbent resin 1 Manufactured by Nippon Shokubai Kagaku ■.

Aqualic C3-7L Examples 1 to 3 The liquid polymer composition obtained in Production Example 1 (Example 1), the liquid polymer composition obtained in Production Example 2 (Example 2), and the liquid polymer composition obtained in Production Example 3 The obtained liquid polymer composition (Example 3) was
Digged into the ground around the building, width 0.3m, depth 2.0m
It was injected into the groove and filled. In Examples 1 and 2, the fillings were left to stand at room temperature for 24 hours to harden, and then the following measurements were performed. In Example 3), the following measurements were carried out as is.

A vibration source was placed at a point 10 m outward from the groove, and vibration was measured at a point 1.5 m inward from the groove. The vibration, which was 70 dB before construction, decreased to 60 to 61 dB. The vibration, which was previously 80 dB, has decreased to 70-71 dB.

In addition, the physical properties of the filling (elongation) after one year after construction.

When the tensile strength and hardness were measured, no change was observed, and it was confirmed that the original good vibration damping performance was maintained.

〔Effect of the invention〕

According to the method of the present invention, it is possible to easily and effectively prevent vibrations propagating on the ground surface or underground from being transmitted to buildings or the like.

Moreover, the vibration-proofing material filled in the underground trenches is water resistant.

Since it has excellent acid resistance, alkali resistance, etc., the method of the present invention exhibits stable vibration damping performance over time.

Therefore, the present invention can be effectively used to prevent various types of vibration pollution, including traffic vibration pollution caused by automobiles and the like and vibration pollution caused by construction work.

Claims (2)

[Claims] (1) (A) hydroxyl group-containing liquid diene polymer or its hydride, (B) polyisocyanate compound and (C
) A vibration isolation method characterized by filling an underground trench with a liquid polymer resin composition consisting of extended oil or a hollow filler and allowing it to harden. (2) A vibration isolation method characterized by filling an underground trench with a liquid composition whose main components are a water-absorbing resin and water.