JPH11209635A - High-damping material composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide inexpensively a high-damping material composition possessing excellent damping performances in a wide temperature range with little time deterioration. SOLUTION: This composition is obtained by compounding a polar-group- or polar-side-chain-containing polymeric material such as chlorinated polyethylene with a damping additive being a compound having at least two ester bonds in the molecule, such as a phthalate, trimellitate, pyromellitate, adipate, sebacate, phosphate, thioether or ether type and, optionally, a basic substance containing in the molecule at least two bases selected among sec. amine groups, tert. amine groups, and nitrogen-containing heterocyclic rings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-attenuation material composition, and more particularly, to a vibration-absorbing or sound-absorbing material applied to a sound insulation wall of an acoustic room, a sound insulation partition of a building structure, a sound insulation wall of a vehicle, and the like. The present invention relates to a high damping material composition as a vibration material and a soundproofing material.

[0002]

2. Description of the Related Art A polymer material as a high damping material composition of this type exhibits a typical viscoelastic behavior.
When the material minute portion vibrates for some reason, a complex sinusoidal strain (ε ^* ) is generated in each material minute portion, thereby generating a complex sinusoidal stress (σ ^* ). Complex modulus of elasticity (E
^* ) Is the ratio of these, as shown in the following equation. Complex modulus of elasticity (E ^* ) = complex sinusoidal stress (σ ^* ) / complex sinusoidal strain (ε ^* )

The real part of the complex elastic modulus (E ^* ) is defined as the storage elastic modulus (E ') relating to the elastic properties of the material, and the imaginary part thereof is the loss elasticity relating to the viscous properties of the material. The loss tangent is the ratio of these, as shown in the following equation: loss tangent (tan δ) = loss elastic modulus (E ″) / storage elastic modulus ( E ')

The loss tangent (hereinafter simply referred to as “tan δ”) is one of the factors that determine the soundproofing / damping characteristics. The higher this value, the more the mechanical energy is absorbed or released as electric or thermal energy. Thus, it is known to exhibit mechanical properties such as excellent sound absorbing properties and vibration damping properties. The value determined as tan δ of the high attenuation material composition is 0.5 or more.

Therefore, the applicant of the present application has proposed the required characteristic (ta).
nδ ≧ 0.5), as a high attenuation material composition exhibiting a high tan δ, a base material containing a secondary amine, a tertiary amine or a nitrogen-containing heterocycle in one molecule in a predetermined volume ratio. A material which has been subjected to a heat treatment step, a molding step, and the like has been proposed, and a patent application has already been filed.
This high attenuation material composition uses chlorinated polyethylene as a base polymer and N, N-dicyclohexylbenzothiazyl-2-sulfenamide or the like as a basic substance.

Further, the present applicant has adjusted the basicity of the blended components by blending not only a basic substance but also an acidic substance into the base polymer as a high attenuation material composition that exhibits a higher tan δ. A high damping material composition has been proposed and has also been patented. These are simply ta
Not only is nδ high, but also because it is a multi-component compound, it has the effect of suppressing a decrease in tanδ due to aging.

Also, most of the above-mentioned high attenuation material compositions have a tendency that the tan δ peak value shifts to a high temperature side and becomes higher than room temperature due to the blending of the basic substance. Is most effective in a temperature environment higher than room temperature, in which tan δ is high and changes with time are small.

[0008]

However, since the above-mentioned basic substance is generally a heterocyclic compound, it often has high crystallinity due to low intramolecular mobility and rigidity. . Further, when a rubber material is used as the base polymer, the molecular cohesion energy is small and the molecular chain is easily moved, so that the amine compound is particularly easily crystallized. As long as this crystallization cannot be prevented, t
Even if the decrease in an δ can be suppressed to some extent, it will eventually decrease.

Further, the basic substance containing a base selected from secondary amines, tertiary amines and nitrogen-containing heterocycles used in the above-described high attenuation material composition is very expensive, and In putting a damping material into practical use, high material cost is a major barrier.

Further, in order to put the high-damping material composition into practical use, it is required to exhibit a damping performance not only in a high-temperature region but also in a low-temperature region, but those containing a basic substance are considerably higher than normal temperature. There were many materials in the temperature range, and there was a strong demand for the development of materials that exhibit damping performance in lower temperature ranges.

An object of the present invention is to provide a high-damping material composition having excellent damping performance over a wide temperature range and having little change over time at a relatively low price.

[0012]

In order to solve this problem, a high attenuation material composition of the present invention has a base polymer having a polar group or a polar side chain having two or more ester bonds in one molecule. The gist is that a compound is blended.

The "base polymer having a polar group or a polar side chain" includes natural rubber, modified natural rubber, grafted natural rubber, cyclized natural rubber, chlorinated natural rubber, styrene-butadiene rubber, chloroprene rubber, acrylonitrile-
Butadiene rubber, carboxylated nitrile rubber, nitrile rubber / vinyl chloride resin blend, nitrile rubber / EP
DM rubber blend, butyl rubber, brominated butyl rubber,
Chlorinated butyl rubber, ethylene-vinyl acetate rubber, acrylic rubber, ethylene-acrylic rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, methyl silicone rubber, vinyl-methyl silicone rubber, phenyl-methyl silicone rubber, Rubber materials such as fluorinated silicon rubber, polystyrene-based thermoplastic elastomer, polyvinyl chloride-based thermoplastic elastomer, polyolefin-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, vinyl chloride-based Thermoplastic elastomer materials such as thermoplastic elastomers, fluororubber-based thermoplastic elastomers, chlorinated polyethylene-based elastomers, and polyvinyl chloride Chlorinated polypropylene, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl fluoride, polyvinylidene fluoride, polyacrylonitrile, polymethyl methacrylate, styrene / acrylonitrile copolymer, acrylonitrile / butadiene / styrene Selected from polymer resin materials such as terpolymers, vinyl chloride / vinyl acetate copolymers, acrylic / vinyl chloride graft copolymers, ethylene / vinyl chloride copolymers, ethylene / vinyl alcohol, and chlorinated vinyl chloride Further, at least one kind or two or more kinds of base polymers are mentioned as preferable ones.

The "compound having two or more ester bonds in one molecule" includes dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, diisodecyl phthalate, diundecyl phthalate, diphenyl phthalate, dicyclohexyl phthalate, ortho diallyl phthalate, Phthalic acid ester compounds such as isodiallyl phthalate, teredialyl phthalate, dioctyl phthalate dimer, trimet acid ester compounds such as trioctyl trimetate, pyromet acid ester compounds such as tetraoctyl pyrometate, dioctyl adipate, diisodecyl adipate,
Preferred are adipic acid ester compounds such as adipic acid polyester, sebacic acid ester compounds such as dibutyl sebacate, phosphoric acid ester compounds such as triphenyl phosphate, thioether ester compounds, ether ester compounds and the like. No.

The amount of the compound having an ester bond is 10% with respect to 100% by weight of the base polymer.
It is desirably about 150% by weight. Particularly, when the rubber material is used as the base polymer, the amount is preferably 10 to 50% by weight, and when the resin material is used, the amount is preferably 30 to 150% by weight. If the amount of the ester compound is too low, the damping property cannot be exhibited. If the amount is too high, problems may occur in the workability of the material.

According to the high attenuation material composition having the above-described structure, the intermolecular interaction between the base polymer and the basic substance imparted by the basic substance in the conventional high attenuation material composition is reduced by the basic By using a compound having an ester bond instead of a substance, the interaction between the base polymer and the compound having an ester bond is replaced, and the high damping performance of the conventional high damping material composition is not impaired. Become.

Further, the compound having an ester bond is difficult to be crystallized due to its high mobility, so that not only the compound having little change with time but also a high attenuation material composition whose peak temperature tends to shift to a low temperature region is obtained. Becomes Moreover, since these ester compounds can be obtained at a lower cost than basic substances that have been conventionally used as additives, the high attenuation material composition according to the present invention can be provided at a low cost.

Further, another high attenuation material composition of the present invention comprises:
Compounding a compound having two or more ester bonds in one molecule with a base polymer having a polar group or a polar side chain,
Furthermore, the gist is that a basic substance containing two or more bases selected from a secondary amine, a tertiary amine and a nitrogen-containing heterocycle in one molecule is blended.

"Basic substances having a base selected from secondary amines, tertiary amines and nitrogen-containing heterocycles" include N-cyclohexylbenzothiazyl-2-sulfenamide, N-tert-butyl Benzothiazyl-2-
At least one or two or more sulfenamide additives selected from sulfenamide, N-oxydiethylenebenzothiazyl-2-sulfenamide, N, N-dicyclohexylbenzothiazyl-2-sulfenamide , 2- (N, N-diethylthiocarbamoylthio) benzothiazole, 2- (4'-morpholinodithio) benzothiazole, at least one or more thiazole-based additives, tetraethylthiuram disulfide, tetrabutyl At least one or two or more thiuram-based additives selected from thiuram disulfide;
At least one or two or more guanidine-based additives selected from 3-diphenylguanidine and di-O-tolylguanidine, and 2- (2-hydroxy-
3- (3,4,5,6-tetrahydrophthalimido-methyl) -5-methylphenyl) -benzotriazole,
1- [N, N-bis (2-ethylhexyl) which is a rust inhibitor
Aminomethyl] benzotriazole, (1,2,3-benzotriazolyl-1-methyl) (1,2,4-triazolyl-1-methyl) -2-ethylhexylamine,
N, N'-bis (benzotriazolylmethyl) -diaminohexane, 2,2'-methylenebis {4- (1,1,3,3-tetramethylbutyl) -6- as a light stabilizer
6 [(2H-benzotriazol-2-yl) phenyl]}, N, N-bis (benzotriazolemethyl)-
2-ethylhexylamine, N, N-bis (benzotriazolemethyl) -laurylamine, 1- (2-ethylhexylaminomethyl) -benzotriazole, 1- (laurylaminomethyl) -benzotriazole, 1- (morpholinomethyl) -benzo At least one or two or more benzotriazole-based additives selected from triazole, at least one or two selected from zinc dibutyldithiocarbamate and tellurium diethyldithiocarbamate
Or more dithiocarbamate-based additives, 4,4 ',
4 "-trisdimethylaminotriphenylmethane, 2,
At least one or more pigments selected from a blend of 2 '-(1,2-ethenediyl) bis (5-methylbenzoxazole) and dicyclohexyl phthalate; pyridine-based additives such as 2,2-dithiodiopyridine , Methylene bis (dibutyldithiocarbamate) and other lubricating oil additives, 2,4,6-tri (dimethylaminomethyl) phenol and other epoxy resin curing accelerators, dimorpholine ether, N, N ', N "-tris (dimethyl Aminopropyl) hexahydro-S-triazine, N, N,
N-tris (3-dimethylaminopropyl) amine, N
-Methyl-N, N-bis (3-dimethylaminopropyl) amine, at least one or more urethane catalysts, triallyl isocyanurate as an unsaturated resin crosslinking agent, tris- (2-hydroxyethyl ) At least one or two or more isocyanuric acid derivatives selected from isocyanurate, trimetaallyl isocyanurate, and tris- (2,3-dibromopropyl) isocyanurate, 1,2,2,6,6-pentamethyl -4-biperidyl / tridecyl 1,2,3,4-butanetetracarboxylate, 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinol and β, β , Β ', β'-tetramethyl-3,9-
(2,4,8,10-tetraoxaspiro [5,5] undecane) One or more selected from at least one or two or more hindered amine-based additives selected from condensates with diethanol Are preferred.

Furthermore, a high attenuation material composition containing not only a compound having an ester bond in the base polymer but also a basic substance shifts its peak value to a high temperature side and to a low temperature side. By adjusting the compounding amount of the compound having an ester bond, it is possible to impart a temperature characteristic suitable for the temperature range of the use environment.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. In the following description, “% by weight” means the percentage by weight of the compounding component with respect to 100% by weight of the base polymer.

First, Tables 1 and 2 show the tan δ of the products of the present invention (Examples 1 to 23) in which chlorinated polyethylene was used as a base polymer, and a compound having two or more ester bonds in one molecule was added thereto. It is a comparison between the measurement results of the peak value and the peak temperature and the measurement results of a chlorinated polyethylene alone (Comparative Example 1) as a comparative product.

[0023]

[Table 1]

[0024]

[Table 2]

In the table, the product of the present invention (Examples 1 to 23)
Uses Showa Denko KK: trade name "Eraslen 401A" for chlorinated polyethylene as a base polymer. Then, 100% by weight of the chlorinated polyethylene was mixed with 30% by weight of the ester compound in Examples 1 to 21, and 100% by weight in Examples 22 and 23. In Comparative Example 1, which is a comparative product, no ester compound was blended.

As the ester compound incorporated in the product of the present invention (Examples 1 to 23), dimethyl phthalate (trade name “DMP” manufactured by Daihachi Chemical Industry Co., Ltd.) was used in Example 1 and diethyl ester was used in Example 2 Example 4 used phthalate (trade name “DEP” manufactured by Daihachi Chemical Industry Co., Ltd.) and Example 3 used dibutyl phthalate (brand name “DBP” manufactured by Sanken Kako Co., Ltd.).
Is dioctyl phthalate (manufactured by Sanken Kako Co., Ltd .: trade name "DOP"), Example 5 is diisodecyl phthalate (manufactured by Sanken Kako Co., Ltd .: trade name "DIDP"), and Example 6 is diundecyl phthalate. Example 8 uses diphenylphthalate (manufactured by Nippon Rika Co., Ltd .: trade name "DPP");
Is dicyclohexyl phthalate (Osaka Organic Chemical Co., Ltd.)
Example 9 was ortho-diallyl phthalate (trade name “Dap Monomer” manufactured by Daiso Co., Ltd.), and Example 10 was isodialyl phthalate (trade name “Dopso” manufactured by Daiso Co., Ltd .: trade name “DCHP”). DUP 100 monomer ")
Example 11 used teredialyl phthalate (trade name “Daprene monomer” manufactured by Daiso Corporation) in Example 1.
2 uses a dimer of dioctyl phthalate (trade name “Polysizer W-20” manufactured by Dainippon Ink Co., Ltd.), and Examples 1 to 12 are phthalic acid ester compounds.

In Example 13, trioctyl trimetate (manufactured by Kurokin Chemical Co., Ltd., trade name: “TOTM”), which is a trimetate ester compound, was used. In Example 14, tetrapyrromeate, a pyrometate ester compound, was used. Octyl (made by Asahi Denka Co., Ltd .: Trade name "Adekaiser UL-
80 ").

Example 15 is dioctyl adipate (manufactured by Sanken Kako Co., Ltd .: trade name "DOA"). Example 16 is diisodecyl adipate (manufactured by Sanken Kako Co., Ltd .: trade name "D").
Example 17 used an adipic acid-based polyester having a molecular weight of about 1000 (manufactured by Asahi Denka Co., Ltd .: trade name “Adekaiser PN150”) in Example 17, and Example 18 used a molecular weight of about 200.
Adipic acid-based polyester having a molecular weight of about 3000 (Adekaizer PN350) manufactured by Asahi Denka Co., Ltd .; Examples 15 to 19 are adipic acid ester compounds.

In Example 20, dibutyl sebacate (manufactured by Sanken Kako Co., Ltd., trade name: “DBS”), which is a sebacic acid ester, was used. In Example 21, triphenyl phosphate, which was a phosphoric acid ester compound, was used. (Daichi Chemical Industry Co., Ltd .:
Example 22 was changed to ditridecylthiodipropionate (manufactured by Asahi Denka Co., Ltd .: trade name “ADK STAB AO503”), which is a thioether ester compound.
A ") was prepared by using triethylene glycol bis [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionate] (Example 23 is an ether ester compound) (trade name, manufactured by Asahi Denka Co., Ltd.). "ADK STAB AO7
0 ”).

Tables 6 and 7 show the structural formulas of the ester compounds blended in Examples 1 to 23.

[0031]

[Table 6]

[0032]

[Table 7]

Next, a method for manufacturing the product of the present invention (Examples 1 to 23) will be described. First, a predetermined amount of the additive of each embodiment is blended with 100% by weight of the base polymer (chlorinated polyethylene) described above. This is kneaded with two rolls at room temperature for about 15 to 20 minutes. Next, the kneaded material is melt-press-molded in a predetermined mold by a hot press machine at a temperature 20 ° C. higher than the melting point of the additive for about 10 minutes. Further, under a temperature condition of 0 ° C.,
Cold press molding is performed by applying a surface pressure of 0 kgf / cm ² to obtain a 2 mm sheet. The sample of Comparative Example 1, which was a chlorinated polyethylene alone, was produced in the same process.

Next, the tan δ peak value and the peak temperature of the product of the present invention (Examples 1 to 4) and the comparative product were measured.
For this measurement, a spectrometer manufactured by Rheology Co., Ltd. was used.
The frequency was 15 Hz (constant).

The measurement results of Examples 1 to 23 will be described below. As shown in Tables 1 and 2, Examples 1 to 23
Are all higher than the tan δ peak value of the comparative product and far exceed the required characteristics (tan δ ≧ 0.5), which can be said to be extremely excellent results. In particular, Example 23
Indicates a value of 2.22, which is more than twice the value of the comparative example.

The peak temperature was measured in Examples 7, 8, and 23.
Showed a value close to room temperature, but the other values were lower than around 0 ° C. Among them, only Example 23 was 23.5.
The reason for the relatively high value of ° C. is considered that the peak temperature shifted to a higher temperature side because the interaction between the base polymer and the additive was stronger than in the other examples.

Next, the reduction of tan δ due to the change over time will be described in detail. Table 3 shows time-dependent changes of Example 9 as a representative example of the monomers and Examples 17 and 19 as a representative example of the oligomer (low molecular weight polymer) among the above Examples 1 to 23. Comparative Example 1 was used as a comparative product. Incidentally, the tan δ reduction rate used in Table 3 is
(Tan δ reduction rate) = ｛(tan δ immediately after molding) − (1
Tan δ after months)｝ / (tan δ immediately after molding) × 10
It is obtained by the formula of 0, and it can be said that the smaller this value is, the smaller the change with time is.

[0038]

[Table 3]

First, the tan δ after one month of Examples 9, 17, and 19 was all tan δ immediately after molding in Comparative Example 1.
The value is about 1.5 times that of the above, indicating an excellent result. The rate of decrease was 7.2% in Example 9.
And excellent results (indicated by a circle in the table).
%, Which is an extremely excellent result (marked with ◎ in the table), and Example 19 also shows an extremely excellent result of 4.6% (marked with ◎ in the table).

When comparing Example 9 which is a monomer and Examples 17 and 19 which are oligomers, the monomer shows good results as an additive, but the oligomer is more preferable. It can be seen that the results are shown. From the comparison between Example 17 and Example 19, it was also found that, among the oligomers, the degree of change with time was different depending on the degree of polymerization. In this case, Example 17 using an additive having a molecular weight of about 1,000 was used.
Is preferred.

Next, in order to examine the dependency of the additive amount, the comparison was made by changing the additive amount of the additive of Example 23 which exhibited the highest tan δ among Examples 1 to 23. In Example 23, as described above, Adecastab AO703 was added to 100% by weight of chlorinated polyethylene as a base polymer.
It is the one that is blended at 00% by weight.
ADK STAB AO7 in 100% by weight of chlorinated polyethylene
Comparative Example 2 was prepared in the same procedure as in Example 23, and the measurement results are shown in Table 4.

[0042]

[Table 4]

What can be said in comparison between Example 23 and Comparative Example 2 is that as the amount of the ester compound is increased, t
That is, the value of an δ increases and the peak temperature of tan δ can also be changed. However, it is not good that the compounding amount is large. If the compounding amount is too large, there is a problem in workability of the material. Example 2
The reason why the peak temperature of Sample No. 3 is higher than that of Comparative Example 2 is considered to be that the interaction with the base polymer is increased because the amount of the additive is large.

Next, in another embodiment of the present invention, a base selected from a secondary amine, a tertiary amine and a nitrogen-containing heterocycle is added to a base polymer having a polar group or a polar side chain in one molecule. Is mixed with a basic substance containing two or more
A high attenuation material composition containing a compound having two or more ester bonds in the molecule will be described. This high-damping material composition adjusts its temperature characteristics by blending an ester compound which tends to lower the peak temperature in addition to a basic substance having an effect of shifting the peak temperature to a higher temperature side. It is intended.

First, in Example 24, the base polymer 100 was used.
2- (2-hydroxy-3- (3,4,5,6-tetra-hydrophthalimidomethyl) -5-methylphenyl) -benzotriazole (manufactured by Sumitomo Chemical Co., Ltd.) based on the weight% : Product name "Sumisorb 25
0 "), and 30% by weight of a dioctyl phthalate dimer (trade name" Polysizer W-20 ", manufactured by Dainippon Ink Co., Ltd.) as an ester compound. That is, the compounding composition of Example 24 is such that the basic substance is compounded in Example 12.

In Comparative Example 3, which is a comparative product, 100% by weight of Sumisorb 250 was added as a basic substance to 100% by weight of the base polymer, and no ester compound was added thereto. Example 24 and Comparative Example 3 were manufactured in the same procedure as in Examples 1 to 23. Table 5 shows the composition and measurement results.

[0047]

[Table 5]

As is clear from Table 5, Example 24
Shows higher tan δ than Comparative Example 3, but its peak temperature shifts to a lower temperature side and approaches a normal temperature side. From this, it is understood that the peak temperature of tan δ can be shifted according to the use environment by adjusting the blending of the ester compound and the basic substance blended in the base polymer.

The present invention is not limited to the embodiment described above, and various modifications are possible. For example, as a modification of the base polymer, various rubber materials, elastomer materials, polymer resin materials, and the like having a polar group or a polar side chain can be used instead of the chlorinated polyethylene used in the above-described embodiment. Furthermore, although a chlorine group was used as the polar group or the polar side chain in the above-described example, it is expected that a base or an acid group other than the halogen group can be applied as long as it has another halogen group or a polarity. Is done.

Examples of the compound having an ester bond used as an additive include phthalic acid, trimetic acid, pyrometic acid, adipic acid,
There is no particular limitation as long as it is a compound having two or more ester bonds in one molecule, such as sebacic acid, phosphoric acid, thioether, and ether, or a polymer thereof.

Examples of modification of the basic substance include various sulfenamide-based additives, thiazole-based additives, thiuram-based additives, guanidine-based additives, rust inhibitors, light stabilizers, benzotriazoles Based additives, dithiocarbamate based additives, pigments, pyridine based additives, lubricating oil additives, epoxy resin curing accelerators, urethane catalysts, unsaturated resin crosslinking agents, isocyanuric acid derivatives, hindered amine based additives, etc. The present invention can be applied to any basic substance containing two or more bases selected from secondary amines, tertiary amines and nitrogen-containing heterocycles in one molecule without any limitation.

The blending amount of the ester compound with respect to 100% by weight of the base polymer is not limited to the above embodiment. However, considering the workability of the material,
It is desirably in the range of 150% by weight. In particular, when used in combination with a basic compound, it is expected that a desired value of tan δ and a desired shift temperature can be obtained by adjusting the amount thereof.

[0053]

According to the high damping material composition of the present invention, a compound having two or more ester bonds in one molecule as an additive is added to a base polymer having a polar group or a polar side chain. As a result, it is possible to achieve the same excellent high attenuation characteristics as when an expensive basic substance that has been conventionally used as an additive is blended, and the temporal change observed when using a basic substance as an additive Since the additive hardly crystallizes, a high attenuation material composition having a low rate of decrease in tan δ due to aging can be provided at low cost.

Furthermore, since a compound obtained by blending an ester compound with a base polymer having a polar group or a polar side chain has a relatively lower peak temperature, a secondary amine which shifts the peak temperature to a higher temperature side, By blending a basic substance containing two or more bases selected from a tertiary amine and a nitrogen-containing heterocycle in one molecule, the peak temperature can be adjusted according to the use environment. Therefore, the high-damping material composition according to the present invention has excellent damping performance in a wide temperature range and has little change over time.
It will be very useful in industry.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16F 15/08 F16F 15/08 D G10K 11/162 B60R 13/08 // B60R 13/08 G10K 11/16 A

Claims (6)

[Claims] 1. A high attenuation material composition comprising a base polymer having a polar group or a polar side chain and a compound having two or more ester bonds in one molecule. 2. The base polymer is a natural rubber, a modified natural rubber, a grafted natural rubber, a cyclized natural rubber, a chlorinated natural rubber, a styrene-butadiene rubber, a chloroprene rubber, an acrylonitrile-butadiene rubber, a carboxylated nitrile rubber, a nitrile. Rubber / vinyl chloride resin blend, nitrile rubber / EPDM rubber blend, butyl rubber, brominated butyl rubber, chlorinated butyl rubber, ethylene-
Vinyl acetate rubber, acrylic rubber, ethylene-acryl rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, methyl silicone rubber, vinyl-methyl silicone rubber, phenyl-methyl silicone rubber, fluorinated silicone rubber, etc. Rubber material, polystyrene-based thermoplastic elastomer, polyvinyl chloride-based thermoplastic elastomer, polyolefin-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, vinyl chloride-based thermoplastic elastomer, fluoro rubber Thermoplastic elastomers, thermoplastic elastomer materials such as chlorinated polyethylene elastomers, polyvinyl chloride, chlorinated polypropylene, Polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl fluoride, polyvinylidene fluoride, polyacrylonitrile, polymethyl methacrylate, styrene / acrylonitrile copolymer, acrylonitrile / butadiene / styrene terpolymer, At least one or two selected from polymer resin materials such as vinyl chloride / vinyl acetate copolymer, acrylic / vinyl chloride graft copolymer, ethylene / vinyl chloride copolymer, ethylene / vinyl alcohol, and chlorinated vinyl chloride;
The high attenuation material composition according to claim 1, wherein the composition comprises at least one base polymer. 3. The compound having an ester bond is dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, diisodecyl phthalate, diundecyl phthalate, diphenyl phthalate, dicyclohexyl phthalate, ortho diallyl phthalate, isodiallyl phthalate, or terdiallyl phthalate. Phthalic acid ester compounds such as dioctyl phthalate dimer, trimet acid ester compounds such as trioctyl trimetate, pyrometic acid ester compounds such as tetraoctyl pyromethate, adipate such as dioctyl adipate, diisodecyl adipate, and adipic acid polyester Acid-based ester compounds, sebacic acid-based ester compounds such as dibutyl sebacate, and phosphate-based esthetics such as triphenyl phosphate 1, a thioether ester compound, an ether ester compound, etc.
The high attenuation material composition according to claim 1, comprising a species or two or more compounds. 4. The compounding amount of the compound having an ester bond is 1 to 100% by weight of the base polymer.
3. The composition according to claim 1, wherein the content is 0 to 150% by weight.
Or a high attenuation material composition according to item 3. 5. A basic polymer having at least two bases selected from secondary amines, tertiary amines and nitrogen-containing heterocycles in a molecule is blended with a base polymer having a polar group or a polar side chain. And a compound having two or more ester bonds in one molecule. 6. The basic substance includes a sulfenamide-based additive, a thiazole-based additive, a thiuram-based additive,
Guanidine additives, ultraviolet absorbers, rust inhibitors, light stabilizers, benzotriazole additives, dithiocarbamate additives, pigments, pyridine additives, lubricating oil additives,
6. The composition according to claim 5, comprising one or more additives selected from an epoxy resin curing accelerator, a urethane catalyst, an unsaturated resin crosslinking agent, an isocyanuric acid derivative, and a hindered amine-based additive. High attenuation material composition.