JPH0270751A - Urethane composition for vibration-damping, sound-proofing and sound-isolating material - Google Patents

Abstract

PURPOSE:To obtain the title composition improved in processability, applicability, sound absorptivity, vibration-damping properties, sound-proofing properties, sound-isolating properties and reinforcing properties by mixing a composition based on a polyisocyanate compound with another composition based on a polyol compound. CONSTITUTION:A composition (A) is obtained by mixing 100pts.wt. polyisocyanate compound (a) (e.g., xylylene diisocyanate) with 1-50pts.wt. inorganic filler (b) (e.g., clay) and 1-50pts.wt. at least one component (c) selected from among a softener, a plasticizer and a tackifier. A composition (B) is obtained by mixing 100pts.wt. polyol compound (d) (e.g., ethylene glycol) with 1.2-100pts.wt. component (b) and 1.2-100pts.wt. component (c) in such amounts that the amount of component (b) is at least 1.2pts.wt. per pt. wt. component (d). Component A is mixed with component B in such a ratio that the equivalent ratio of component (a) to the hydroxyl groups of component (a) is 0.7-3 (NCO groups/OH group, by equivalent ratio).

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a urethane composition for vibration damping, sound insulation, and sound insulation materials, and is used in buildings that require vibration damping, soundproofing, and sound insulation properties of structures. This invention relates to a urethane composition for control, soundproofing, and sound insulation materials suitable for automobiles, trains, ships, aircraft, road walls, and railway walls.

[Prior art] Vibration damping, soundproofing, and sound insulating materials include various rubbery substances, bituminous substances, thermoplastic resins, etc., to which fillers such as mica, carbon black, calcium carbonate, and barium sulfate are added. There is. There are also various types of fibers. However, these have many limitations such as a large number of processing steps and construction steps, and are complex, which poses practical problems.

In addition, some urethane-based materials have entered the testing stage, but they have not yet achieved satisfactory vibration damping, soundproofing, and sound insulation properties, and there are also cost hurdles, making it difficult to consider future practical applications. This is a waiting stage.

[Problems to be Solved by the Invention] As described above, existing vibration damping/sound insulating materials have problems in processing steps, construction steps, vibration damping properties, soundproofing properties, sound insulation properties, cost, etc. Specifically, asphalt-based damping materials, which are typified by damping materials, are dependent on environmental temperature during processing, construction, and actual use, and their behavior is unstable due to process and characteristics. .

Rubber-based vibration damping materials have excellent properties in terms of performance, but it is currently difficult to adapt them to any shape during construction.

The present invention is intended to solve the above-mentioned problems.
The object of the present invention is to provide a urethane composition for vibration damping, soundproofing, and sound insulation materials that has good workability and also has vibration damping performance, soundproofing performance, sound absorption performance, sound insulation performance, and reinforcing performance.

[Means for Solving the Problems] The present invention includes 1 to 50 parts by weight of an inorganic filler (B) selected from softeners, plasticizers, and tackifiers based on 100 parts by weight of the polyisocyanate compound (A1). A composition (1) containing 1 to 50 parts by weight of at least one component (C);
1.2 to 100 parts by weight of the inorganic filler (B) and 1.2 to 100 parts by weight of at least one component (C) selected from softeners, plasticizers, and tackifiers for 100 parts by weight of the polyol compound (A2). The addition ratio of (B) and (C) to (A1) is ff1 (polymerization) to (A2) compared to the addition ff1 (polymerization) to (A1).
weight) is 1.2 or more, and the ratio of the polyisocyanate compound (weight) to the hydroxyl group of the polyol compound (A2) is 1.2 or more, and
The isocyanate equivalent ratio of A1) is 0.7 to 3 (NCO
The object of the present invention is to provide a urethane-based composition for vibration damping, soundproofing, and sound insulating materials, which is characterized by a ratio of OH group to OH group (equivalent ratio).

The present invention will be specifically explained below.

Examples of the polyisocyanate compound (A1) that can be used in the present invention include aliphatic, aromatic, and ring-type polyisocyanate compounds.

Examples of the polyisocyanate compound (A1) include xylylene diisocyanate and poly.

Isocyanate compounds such as phenylmethane diisocyanate, 4.4'-diphenylmethane diisocyanate, isophorone diisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, naphthalene diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate, dicyclohexylmethane diisocyanate, or polymers thereof etc. can be mentioned. These compounds may be used alone or in combination of two or more.

Further, the polyisocyanate compound (A1) can also be used in the form of a prepolymer having an isocyanate group at the end, which is obtained by reacting the above-described isocyanate compound with an active hydrogen compound such as a polyamine compound. Such a prepolymer can be obtained by reacting an isocyanate compound and an active hydrogen compound such as a polyamine compound at a normal reaction temperature, for example, 20 to 90°C for 1 to 6 hours. Here, examples of the polyamine compound include ethylene diamine, hexamethylene diamine, and the like.

Furthermore, a compound containing an allophanate bond, an isocyanurate bond, an erbodiimide bond, etc. in the molecule and having an isocyanate group at the end, such as a condensate of diphenylmethane diisocyanate, etc. can also be used as the polyisocyanate compound (A1).

Furthermore, a part of the polyisocyanate compound (A+) is reacted with a polyol compound (A2) in advance to form a prepolymer having a hydroxyl group at the end (hereinafter referred to as "prepolymer ■").
It is written as ) can also be used.

Polyol compounds that can be used in the present invention (
Examples of A2) include ethylene glycol, propylene glycol, polypropylene glycol, trimethylolpropane, diethylene glycol, triethylene glycol, hexamethylene glycol, glycerin, 1
, 3-butylene glycol, 1,4-butanediol,
Polyhydric alcohols such as hexanetriol, pentaerythritol, sorbitol, and neopentyl glycol; polyether polyols such as compounds obtained by addition polymerization of the above polyhydric alcohols and alkylene oxides such as ethylene oxide and propylene oxide; and maleic acid, succinic acid, adipic acid,
Polyester polyol compounds obtained by condensation reaction with polybasic acids such as sebacic acid, tartaric acid, terephthalic acid, and isophthalic acid; Polyester polyols obtained by ring-opening polymerization of lactones such as ε-caprolactone and γ-valerolactone; Acrylic acid Monomers that can be polymerized alone or copolymerized with hydroxyl group-containing polymerizable monomers such as hydroxyethyl, hydroxybutyl acrylate, and trimethylolpropane acrylic acid monoester;
For example, acrylic polyol compounds obtained by copolymerizing acrylic acid, methacrylic acid, styrene, acrylonitrile, α-methylstyrene, etc.; castor oil or derivatives thereof; epoxy resins with epoxy groups at both ends, monoethanolamine, jetanol, etc. Examples include epoxy polyol compounds reacted with amines and the like.

Further, a part of the polyol compound (A2) can be reacted with the polyisocyanate compound (A1) in advance and used in the form of a prepolymer having an isocyanate group at the end (hereinafter referred to as "prepolymer (2)").

The urethane composition of the present invention has primary or secondary
grade amino compounds can be added. This primary or secondary amine compound is usually a polyol (A2)
It is added to a polyol component containing as a main component. Specific examples of such primary or secondary amine compounds include aliphatic polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenehexamine, and pentaethylenehexamine;
Alicyclic polyamines such as cyclohexylene diamine, dicyclohexacylmethane diamine, isophorone diamine; aromatic polyamines such as phenylene diamine, tolylene diamine, xylylene diamine, diphenylmethane diamine, polyphenylmethane polyamine; piperazine,
Heterocyclic polyamines such as aminoethylpiperazine; others may be mentioned. The addition ratio of these amine compounds is preferably 0 to 5 parts by weight based on 100 parts by weight of polyol (A2).

As the polyisocyanate compound, preferably the proportion of isocyanate groups possessed by the diisocyanate compound is
It is 80 equivalent % or more of all isocyanate groups. On the other hand, as a polyol compound, preferably the proportion of hydroxyl groups possessed by a low molecular weight polyol compound having a molecular weight of 300 or less is 40 to 80 equivalent% of the total hydroxyl groups, and the proportion of hydroxyl groups possessed by a high molecular weight polyol compound having a molecular weight of ff11000 or more is preferably 40 to 80 equivalent% of the total hydroxyl groups. It is 20-60 equivalent%.

Furthermore, a curing catalyst may be added to the urethane composition of the present invention in order to accelerate curing of the composition. This curing catalyst is usually added to a polyol component mainly containing polyol (A2). Such curing catalysts include, for example, stannous carboxylates such as stannous acetate, stannous octoate, stannous laurate, and stannous oleine; dibutyltin acetate, dibutyltin dilaurate, dibutyltin maleate; , dibutyltin di-2-ethyl hexasoate, dilauryltin diacetate, dioctyltin diacetate, and other dialkyltin salts of carboxylic acids; trialkyltin hydroxides such as trimethyltin hydroxide, tributyltin hydroxide, and trioctyltin hydroxide. Tin; dialkyl tin oxides such as dibutyl tin oxide, dioctyl tin oxide, dilauryl tin oxide;
Dialkyltin chlorides such as dibutyltin dichloride and dioctyltin dichloride; tertiary tin chlorides such as triethylamine, benzyldimethylamine, triethylenediamine, tetramethylbutanediamine, 2-methyl-triethylenediamine
DBU salts such as phenol salt, stearate, oleate, and formate of 1,8-diaza-bicyclo(5,4,0)undecene-7 (hereinafter abbreviated as rDBUJ); and others are used. be able to.

The equivalent ratio of NCO groups/OH groups in the composition (A) of the present invention is 0.7-3, preferably 0.8-2. 0.8
If it is less than 3, the water resistance of the urethane composition after curing will not be sufficient, while if it exceeds 3, the initial curing reaction of the urethane composition will be extremely slow, which is not preferred in practice.

In the composition of the present invention, the amount of the inorganic filler (B) is 1 to 50 parts per 100 parts of the polyisocyanate compound (A1).
When the weight part, preferably 1 to 40 parts by weight, and more preferably 2 to 30 parts by weight, the total mold assembly filler (B) is less than 1 part by weight, vibration damping, soundproofing, sound insulation, and sagging properties during construction are poor; 5
If it exceeds 0 parts by weight, the viscosity of the system increases and the mixing coating processability is impaired. On the other hand, polyol compound (A
2) 1.2 to 100 parts by weight, preferably 2 to 80 parts by weight, more preferably 4 to 70 parts by weight, per 100 parts by weight. If the inorganic filler (B) is less than 1.2 parts by weight, vibration damping, soundproofing, sound insulation and sagging properties during construction will be poor, and if it exceeds 100 parts by weight, coating processability will be poor. B is A1 addition amount 1
A2 addition amount is 1.2 or more, preferably 1.5 to 30
If it is less than 1°2, the vibration distribution, sound insulation, sound insulation properties, and reaction of urethane will be impaired, which is not preferable.

As the inorganic filler (B), those well known as reinforcing fillers for rubber and plastics are used.

The shape is not limited as long as it is solid, and it can take the form of powder, fibrous powder, fibers, whiskers, balloons, etc., but from economical considerations, powder is preferred. Specifically, for example, clay, calcined Latarc, catalbo, silica, alumina, magnesium oxide, calcium silicate, asbestos, sodium aluminate, calcium aluminate, sodium aluminosilicate, magnesium silicate, aluminum hydroxide, hydroxide Calcium, barium sulfate, potassium, light bread, sodium light bread, iron bread, shirasu balloon, glass balloon, carbon black, coke please, zinc oxide, antimony dioxide, boric acid, borax, zinc borate, metal powder, metal whiskers, mica , graphite, titanium oxide, carbon fiber, glass fiber, glass fiber powder, glass beads, calcium carbonate, zinc carbonate, hydrotalcite, iron oxide, etc. Examples of the overcast filler include those that have been subjected to various surface treatments in order to further enhance the effects of the present invention.

In the composition of the present invention, component (C) is 1 to 50 parts by weight, preferably 1 to 40 parts by weight, more preferably 2 to 40 parts by weight, based on 100 parts by weight of the polyisocyanate compound (A+).
It is 30 parts by weight. If it is less than 1 part by weight, mixing and processing workability will be poor. On the other hand, if it exceeds 50 parts by weight, the bonding strength with the adherend will be impaired. Polyol compound (A
2) It is 1.2 to 100 parts by weight, preferably 2 to 80 parts by weight, and more preferably 4 to 70 parts by weight relative to 100 parts by weight. If it is less than 1.2 parts by weight, mixing and processing workability On the other hand, if it exceeds 100 parts by weight, the bonding strength with the adherend will be impaired, which is not preferable. Ingredient (C)
The amount of addition of (A2) is 1.2 for the amount of addition of (A1) of 1.
Above, preferably 1.5 to 30. If the amount of (A2) added is less than 1°2, vibration damping properties, soundproofing properties, sound insulation properties, and urethane reactivity are impaired, which is not preferable.

Examples of softeners include process oils, lubricating oils, paraffin, liquid paraffin, petroleum asphalt, petroleum softeners such as vaseline, coal tar softeners such as coal tar and coal tar pitch, castor oil, linseed oil, and rapeseed oil. , fatty oil-based softeners such as coconut oil, tall oil, sub-oil, waxes such as beeswax, carnauba wax, and lanolin, fatty acids such as ricinoleic acid, palmitic acid, stearic acid, barium stearate, calcium stearate, and zinc lanophosphate. and synthetic polymer substances such as fatty acid salts and petroleum resins.

Examples of the plasticizer include phthalate esters, adipate esters, sebacate esters, phosphoric acid esters, and the like.

Examples of the tackifier include coumaron indene resin, terpene Φ phenol resin, and xylene formalin resin.

In the present invention, composition (1) consisting of (A1) type component
) and a composition (I1) consisting of the (A2) system component are prepared in advance and used for construction, but (A1)
, (A2), (B), and (C) all at once will result in poor dispersion, and if you try to mix them thoroughly, (A1) and (A2)
) will react and harden, making construction impossible.

In the urethane composition of the present invention, the rubber (D) is natural rubber, diene synthetic rubber (isoprene rubber, butadiene rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, styrene-butadiene rubber, etc.)
, (D) resins include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, 1,2-polybutadiene ionomer, acid-modified olefin, polyester,
Polystyrene, acrylonitrile-butadiene-styrene resin, polyamide, etc.; liquid polymers of (D) include liquid nitrile rubber, liquid butadiene rubber, liquid isoprene rubber, liquid styrene-butadiene rubber, liquid chloroprene rubber, liquid epoxy, etc.; metals of (D); is iron,
Copper, zinc, tin, lead, aluminum, magnesium, etc.
Examples of metal oxides (D) include zinc oxide, iron oxide, aluminum oxide, magnesium oxide, copper oxide, etc.; examples of metal salts (D) include alkali metal salts, ammonium, metal salts, and metal soaps (zinc stearate, As the blowing agent for (D), water, methylene chloride, a low boiling point such as Freon-11, a halogenated hydrocarbon alone or in combination, ammonium carbonate, sodium bicarbonate, sodium nitrate, etc. Inorganic blowing agent, dinitrosopentamethylenetetramine, N,N'-dimethyl-N.

N'-dinitrosoterephthalamide, benzenesulfonylhydrazide, P~toluenesulfonylhydrazide, P, P'-oxybis(benzenesulfonylhydrazide), 3,3'-disulfonehydrazide diphenyl sulfone, azobisisobutyronitrile, azobis An organic blowing agent such as formamide and a urea-based, organic acid-based, or metal salt-based foaming aid can be used. The foaming aid is used together with a foaming agent having a high decomposition temperature, such as dinitrosopentamethylenetetramine or azogerbonamide, and is added for the purpose of appropriately lowering the foaming temperature.

As the foam stabilizer (D), silicone foam stabilizers are suitable.

In (D), one or more of rubber, resin, liquid polymer metal, metal oxide, metal salt, foaming agent, and foam stabilizer.
1000 parts by weight, preferably 1 to 500 parts by weight, more preferably 2 to 300 parts by weight. If the amount of one or more of rubber, resin, liquid polymer, metal, metal oxide, metal salt, foaming agent, and foam stabilizer is less than 1 part by weight, the shape retention with the adherend will be poor; If it exceeds it, processability will be impaired and this is not preferable. The preferred method of adding component (D) is (
A2) Added to system components or (A1) system components and (A2)
Add after mixing system components. More preferably, (A1
) and (A2) are mixed and added just before heat generation starts.

The urethane-based composition for vibration damping, soundproofing, and sound insulation of the present invention can be prepared by mixing composition C1) and composition (I1), preferably using a gun with a dispenser, or by mixing composition (1) with composition (I1), for example, using a gun with a dispenser. and composition (n) can be applied to a predetermined site in a layered form, and examples of the method of application include direct bead coating, non-contact shot coating, and non-contact spray coating.

The composition of the present invention is easy to process and can be freely selected from foamed (lightweight) to non-foamed forms and has vibration damping, soundproofing, sound insulation, and sound absorbing performance, and can be suitably used for many purposes. Can be done. For example, floor materials, wall materials, ceiling materials of buildings, parts around the engine of automobiles, parts of floors, doors, trunks, tire housings, ceilings, roofs, etc., all interior parts of trains, ships. Suitable sites include interior parts of aircraft, sound insulation walls of roads, sound insulation walls of railroad tracks, etc.

Examples will be described below, but the present invention is not limited to these examples. Hereinafter, "part" and "%" represent parts by weight and weight %.

(1) Polyisocyanate compound (A + )B 29 parts of a polyether polyol with a uniform average molecular weight ff of 12000 [Efcenol 2020J (manufactured by Asahi Glass ■)] and a 4,4'-diphenylmethane diisocyanate polymer having the following structure [Sumidur 44V-20J] 9 parts of carbodiimide-modified 4,4'-diphenylmethane diisocyanate r I 5 onate 143 L J (manufactured by Kasei Upjohn ■, average functionality 2.5), 16 parts of low molecular weight 22 parts of a bifunctional urethane prepolymer obtained by the reaction of a diol compound and 4,4'-diphenylmethane diisocyanate [Sumidur PFJ (manufactured by Sumidur Urethane ■)] was reacted at 80°C for 2 hours to form a polyisocyanate compound (A1 ) was prepared.

(2) Preparation of polyonyl compound (A2) 62 parts of a polyether polyol "Efsenol 3030" (manufactured by Asahi Glass ■) with an average molecular weight of ff 13000, 10 parts of a polyether polyol (Efsenol 890 MPJ (manufactured by Asahi Glass ■)) with an average molecular weight of 200, A polyol compound (A2) was prepared by mixing with 0.3 part of ethylenediamine.

In the polyisocyanate compound (A1), the proportion of isocyanate groups contained in the diisocyanate compound is 95 equivalent % of the total isocyanate groups.

Moreover, in the polyol compound (A2), the molecular weight is 3
The proportion of hydroxyl groups possessed by a low molecular weight polyol compound having a molecular weight of 00 or less is 60 equivalent% of the total hydroxyl groups (including the hydroxyl group of the first component polyol compound), and the proportion of hydroxyl groups possessed by a high molecular weight polyol compound having a molecular weight of 1000 or more is ,
It accounts for 30 equivalent % of the total hydroxyl groups.

(3) Workability Judged based on the operability of dispenser rGD-IJ and dynamic gun (manufactured by Japan Synthetic Rubber).

Judgment criteria 0: Good Δ: Fairly good ×: Poor (4) Vibration damping property Based on JASOM-329 (cantilever resonance method)
The loss coefficient (hereinafter referred to as η) is the attenuation degree D (dB/see
) was measured and calculated from the following relational expression.

77=D/ (27, 28Xfo) fo: Resonance frequency D: Measuring device for the ratio of amplitude attenuated in 1 second after the vibration applied from the outside of a sample in a resonant state is stopped instantaneously Prue Al Care Co., Ltd. Model 3930 sample shape 170 with one end aligned on a 200X15m+s board
A sample of x15x (2,8±0.05)s+■ was installed.

Judgment criteria η is 0.05 or more ○: Good η is 0.03 to 0.049 Δ: Fair η is 0.0
Less than 3 ×: Poor (5) Sound insulation JIS A1416-1974 sound transmission loss TL (d
Based on B), the measuring device consists of two reverberation chambers sandwiching an opening for mounting the sample, a sound source device, and a receiving device.

The sound transmission loss TL (dB) of the sample was calculated using the following formula.

TL=L1-L2 LL: Sound pressure level difference between rooms (dB) Ll: Reverberation room for sound source, average sound pressure level (dB) L2: For sound reception (〃) Judgment standard 200! 10dB or more at lz O: Good 7-9dB
Δ: Fairly good 6dB or less
×: Poor (6) Sound absorption property Based on JIS A1405 normal incidence sound absorption coefficient measurement method.

Calculation of sound absorption coefficient a=l-1r/Ii= (Ii-Ir)/Ii
Ii: Intensity of incident sound ■r: Intensity of reflected sound (judgment) For 500Hz, 0: 0.1 or more Δ: 0.05 to 0.09 X: Less than 0.05 (7) Bondability Bondability was evaluated using a sandwich structure of 5PCjjq plate/urethane composition/SPC steel plate.

2 SPC steel plates (1.6mm thick) 25.4mmX3
A urethane composition of 2n+m×2mm×300mm was bonded between 00 mm and heated at 150° C. for 1 hour. Thereafter, it was maintained at 23°C for 30 minutes, and peeling evaluation at 23°C was performed using an Instron type tensile tester at a speed of 50 mm/min.

Judgment criteria 50kg/cIl1 or more ○: Good 30-49kg/c-Δ: Slightly good Less than 30kg/cd X: Poor (8) Density Measured using the buoyancy method.

(9) Young's modulus Measured in accordance with JIS K7113.

[Example 1.2.3] Evaluation samples were prepared by applying the compositions shown in Table 1 using a dynamic gun with a dispenser (manufactured by Japan Synthetic Rubber ■). The evaluation samples were cured in a heat oven at 150° C. for 1 hour, except for workability. The evaluation results are shown in Table-1.

[Example 4.5.6.7.8.9.10] N in Example 1
R,1,2-polybutadiene, liquid nitrile rubber, iron powder, zinc oxide, zinc stearate, water, and silicone foam stabilizer were mixed in the proportions shown in Table 1, respectively, to form component (A1) and (A2).
) was added just before the exotherm of the mixture of ingredients began, Example 1
An evaluation sample was prepared and cured in the same manner.

Note that NR and 1,2-polybutadiene were prepared in a 20% solution (
Solvent 205ON) was used. The evaluation results are shown in Table-1.

The formulations used in Examples 1 to 10 were as follows: Calcium carbonate: Shiraishi Calcium Super S (filler) Fukolflex #205ON: manufactured by Fuji Kosan (
Softener) 1.2-Polybutadiene: B805 manufactured by Nippon Synthetic Rubber Liquid nitrile rubber 2. Oxidized zinc manufactured by Nippon Synthetic Rubber #3 Zinc stearate: manufactured by Sakai Chemical Industry Co., Ltd. #3 Zinc stearate: Same as above SZ #2000 Silicone foam stabilizer: Manufactured by Toshiba Silicone [Comparative Example 1.2
．． 3.4.5.6] It was added at the blending ratio shown in Table 1, and an evaluation sample was prepared and cured in the same manner as in Example 1.

Comparative Examples 1.2.3.4.5.6 have compositions outside the scope of the claims. The evaluation results are shown in Table-1.

From Table 1, Examples 1 to 10 are compositions according to the present invention.
Compared with Comparative Examples 1 to 5 outside the scope of the present invention, bondability,
It is clear that the material is excellent in terms of workability, vibration damping, sound insulation, and sound absorption.

[Effects of the Invention] The urethane composition of the present invention can be easily applied to any location using a coating machine such as a gun with a dispenser, and can be suitably used in fields where vibration damping, soundproofing, and sound insulation are required. It also has the advantage of being able to control foaming freely, so it can be used in the interior of building flooring materials, wall materials, ceiling materials, etc., areas around automobile engines, parts of floors, doors, trunks, tire houses, etc. It can be used in a wide range of applications, such as ceilings, parts of pillars, train interiors, ship interiors, sound insulation walls for roads, sound insulation walls for railroad tracks, etc.

Patent applicant: Japan Synthetic Rubber Co., Ltd.

Claims (3)

[Claims] (1) 1 to 50 parts by weight of inorganic filler (B) per 100 parts by weight of polyisocyanate compound (A_1), softener,
A composition (I) containing 1 to 50 parts by weight of at least one component (C) selected from a plasticizer and a tackifier;
1.2 to 100 parts by weight of inorganic filler (B) per 100 parts by weight of polyol compound (A_2), at least one component selected from softeners, plasticizers, and tackifiers (C)
and composition (II) containing 1.2 to 100 parts by weight of The ratio of the added amount (weight) of the polyol compound (A
The polyisocyanate compound (A
The isocyanate equivalent ratio of _1) is 0.7 to 3 (NCO
A urethane-based composition for vibration damping, soundproofing, and sound insulation materials, characterized in that the ratio is (equivalent ratio: group/OH group). (2) Before applying [(A_1)+(B)+(C)] and [(
A_2) + (B) + (C)] A urethane composition for vibration damping, soundproofing, and sound insulation materials. (3) One or more of rubbers, resins, liquid polymers, metals, metal salts, metal oxides, blowing agents, and foam stabilizers (D) 1 per 100 parts by weight of the urethane composition of claim (1). ~1
A urethane composition for vibration damping, soundproofing and sound insulation materials, characterized in that it contains 000 parts by weight.