JPH11181307A - High damping material composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high damping material composition capable of showing a high tan δ in a wide range of temperature including the use environmental temperature, taking the advantage of the temperature dependency of tan δ. SOLUTION: This composition is prepared by dispersing into a base polymer material having a polar side chain such as chlorinated polyethylene a polar substance, such as benzotriazole additive, etc., having not less than two functional groups like an electron acceptor, an electron donor, etc., capable of bonding to the side chain of the base polymer. The obtd. high damping material composition can show high tan δ in a wide range of temperature including the environmental temperature of use, by more than two kinds of interaction due to the bonds among the polar side chain of the base polymer and the more than two functional groups such as amine of the polar substance.

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 Most of such high-damping material compositions utilize the expression of internal energy loss based on the viscoelastic behavior of a polymer material. That is, in many cases, the high damping material composition is designed using a glass transition region corresponding to a region having a high efficiency of converting mechanical energy into heat energy.

A loss tangent tan δ is often used as a coefficient indicating the damping characteristic of such a high damping material composition. The higher the value, the higher the efficiency of converting mechanical energy into heat energy. Excellent sound absorption and vibration damping properties. The loss tangent tan δ is the imaginary part of the complex elastic modulus E ^* , which is the loss elastic modulus E ″ related to the viscous properties of the material, and the real modulus part of the complex elastic modulus E ^* , The ratio to the storage elastic modulus E 'is given by the following equation 1. This loss tangent tan δ (hereinafter, referred to as “tan δ”)
Generally, the required characteristic of “tan δ” is 0.
5 or more, desirably 1.0 or more.

[0004]

(Equation 1)

This tan δ is, as shown in FIG.
It is known to exhibit temperature dependence, and its type is
It can be divided into type A which shows a relatively sharp peak and type B which shows a broad peak. The present applicant has already proposed several high-damping material compositions exhibiting type A temperature dependence. For example, Japanese Patent Application No. 9-1233
No. 87 proposes a material obtained by dispersing a sulfenamide-based vulcanization accelerator in a predetermined volume ratio in a base polymer material and subjecting the same to a predetermined processing and shaping treatment.

[0006] The present applicant has also already proposed some high-damping material compositions exhibiting temperature dependence aimed at Type B. For example, in Japanese Patent Application No. 9-137665, by adding an additive such as dioctyl phthalate or tricresyl phosphate to a mixture of a sulfenamide-based vulcanization accelerator and a base polymer material, tan δ tends to be relatively broad. A material exhibiting temperature dependence is proposed.

[0007]

However, the material proposed in Japanese Patent Application No. Hei 9-12387 was insufficiently designed for optimization utilizing the temperature dependency.
Even if the an δ peak value is high, the required characteristics are not always satisfied at the use environment temperature.

The material proposed in Japanese Patent Application No. Hei 9-137665 can be said to aim at a relatively broad temperature dependency in that it has two tan δ peaks. , Away without much shift. Therefore, those tan
The value of tan δ between the δ peak temperatures is not very high. Therefore, the optimization at the material design stage cannot be said to fully utilize the temperature dependency.

As the high attenuation material composition, in addition to the above-mentioned materials, a multi-component polymer material is also well known. Among them, the physical blend greatly affects the peak shape due to its compatibility. That is, according to the combination having excellent compatibility, the tan δ of the glass transition region shifts between the respective glass transition temperatures at a relatively sharp peak according to the mixing ratio (type A in the same figure). If it is bad, the tan δ peak becomes a broad peak as if gradually peaked, and if the combination is incompatible and two-phase separated, it shows two peaks with little shift from the respective peak positions. That is, with a mere physical blend, an optimization design utilizing the temperature dependence of tan δ cannot be made.

The problem to be solved by the present invention is that tan
It is an object of the present invention to provide a high attenuation material composition that can express high tan δ over a wide temperature range including a use environment temperature by utilizing the temperature dependence of δ.

[0011]

To solve this problem, a high attenuation material composition according to the present invention comprises a base polymer material having polar side chains, and an electron acceptor and an electron donor capable of bonding to the side chains. The gist of the present invention is to disperse at least one kind or two or more kinds of polar substances containing two or more kinds of functional groups selected in a molecule.

When a polar substance containing two or more kinds of functional groups selected from an electron acceptor and an electron donor in a molecule is dispersed in a base polymer material having a polar side chain, the side chain of the base polymer and the polar substance are dispersed. Can form at least two types of interactions that provide tan δ with an appropriate temperature dependency. The tan of the valley between the two tan δ peaks due to the synergistic effect with the two types of interaction.
The value of δ can be increased. The polar side chain of the base polymer may not necessarily be one kind. The more types of polar side chains of the base polymer and the more types of functional groups of the polar substance, the more types of interactions are formed, and it is expected that the expression of high tan δ in a wide temperature range is expected.

[0013] In this case, as a suitable "base polymer material", 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 / EPDM rubber blend, butyl rubber, brominated butyl rubber, chlorinated butyl rubber, ethylene-vinyl acetate rubber, acrylic rubber, ethylene-acryl rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated polypropylene , Epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, methylsilicone rubber, vinyl-methylsilicone rubber, phenyl-methylsilicone rubber, fluorinated silicon rubber, at least one rubber material selected from fluororubber, or polystyrene -Based thermoplastic elastomer, polyvinyl chloride-based thermoplastic elastomer, polyolefin-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer -, At least one or two or more thermoplastic elastomer materials selected from polyamide thermoplastic elastomers, or polyvinyl chloride, chlorinated polypropylene, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl fluoride, Poly (vinylidene fluoride), poly (acrylonitrile), poly (methyl methacrylate), styrene / acrylonitrile copolymer, acrylonitrile / butadiene / styrene terpolymer, vinyl chloride / vinyl acetate copolymer, acrylic / vinyl chloride graft copolymer, At least one selected from ethylene / vinyl chloride copolymer, ethylene / vinyl alcohol, and chlorinated vinyl chloride
Seeds or two or more kinds of resin materials are exemplified.

Suitable examples of the "polar substance" include a guanidine vulcanization accelerator, a hindered amine light stabilizer, a triazole additive, an isocyanurate antioxidant, and a diester type high molecular weight hindered phenol oxide. Those having at least one kind or two or more kinds of functional groups selected from inhibitors are exemplified.

In this case, "the volume of the polar substance with respect to the volume of the base polymer material" is desirably 0.3 or more. If the volume of the polar substance is in this range, the two types of interaction can make tan δ have an appropriate temperature dependency. On the other hand, if the volume of the polar substance is not within this range, a desired tan δ peak shape cannot be obtained.

The high attenuation material composition having the above structure is a base polymer having a polar side chain in a predetermined volume containing a polar substance containing at least two kinds of functional groups selected from an electron acceptor and an electron donor in a molecule. As dispersed in the material, two types of interactions are formed, and tan δ shows moderate temperature dependence. The value of tan δ at the valley between two tan δ peaks is enhanced by the synergistic effect of the two types of interaction. Therefore, the high attenuation material composition according to the present invention develops a high tan δ over a wide temperature range including the use environment temperature.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. In the following description, “% by weight” is based on 100 parts by weight of the base polymer.

First, Table 1 shows the measurement results of the material composition and the attenuation characteristics of the products of the present invention (Examples 1 to 3) in which a polar substance was blended in a base polymer, and a comparative product in which no polar substance was blended in the base polymer. 9 is a comparison between the measurement results of the material composition and the damping characteristic of (Comparative Example 1).

[0019]

[Table 1]

The products of the present invention (Examples 1 to 3)
A chlorinated polyethylene (a product of Showa Denko KK: trade name “Eraslen 401A”) as a chlorine-based polymer material is used as a base polymer, and a guanidine-based vulcanization accelerator is used as a polar material. In Example 1, the guanidine vulcanization accelerator used in Example 1 was 1,
3-diphenylguanidine (Ouchi Shinko Chemical Industry Co., Ltd.)
Example 2 is di-O-triguanidine (manufactured by Ouchi Shinko Kagaku Kogyo Co., Ltd .: product name "Noxeller DT"), and Example 3 is 1-O-tolyl. Biguanide (manufactured by Ouchi Shinko Chemical Co., Ltd .: trade name “Noxeller BG”. The structural formulas of these polar substances are shown in Table 2.

[0021]

[Table 2]

On the other hand, the comparative product (Comparative Example 1) contains only the chlorinated polyethylene as the base polymer.

Next, the manufacturing process of the product of the present invention (Examples 1 to 3) will be described. First, the polar substances (guanidine-based vulcanization accelerators) shown in Table 1 were added to 100% by weight of Elaslen 401A (chlorinated polyethylene), respectively.
The mixture was kneaded with two rolls at room temperature for about 15 to 20 minutes.

Next, the kneaded material is melt-press-molded at 170 ° C. for about 10 minutes in a predetermined mold by a hot press machine, and two kinds of functional groups of different kinds contained in the molecule of the polar substance are obtained. The polar substance was dispersed at the molecular level in the base polymer while forming the interaction of Thereafter, the melt press-formed product was cooled to 0 degree Celsius.
Cold press molding was performed under the conditions of a surface pressure of 130 kgf / cm ² . As a result, a sheet material (product of the present invention) having a thickness of about 2 mm was obtained.

The manufacturing process of the comparative product (Comparative Example 1) is as follows. First, the base polymer was kneaded under the same conditions as the product of the present invention. Next, the kneaded material was mixed with 170 ° C.
Melt press molding for about 10 minutes at
Cold press molding was performed for about 5 minutes. As a result, a sheet material (comparative product) having a thickness of 2 mm was obtained.

Next, the temperature dependence of the loss elastic modulus E ″ and the storage elastic modulus E ′ of the high damping material composition (product of the present invention) was measured, and using these values, the temperature dependence of tan δ was calculated by the following equation (1). 1 to 3 show Examples 1 to 3, respectively.
Tan δ, storage modulus E ′ and loss modulus E ″ of 3
FIG. The loss elastic modulus E ″ and the storage elastic modulus E ′ were measured using a spectrometer manufactured by Rheological Co., Ltd.
Tensile strain 0.05% (constant), measurement frequency 100H
z (Example 3 is 15 Hz) (see Table 1).

Hereinafter, the measurement results will be described with reference to tables and drawings. When the peak value of the product of the present invention shown in Table 1 and the peak value of the comparative product were compared, Examples 1 and 2
Is approximately the same as or slightly higher than the tan δ peak value of Comparative Example 1. Then, the required characteristics (t
an δ ≧ 0.5), the product of the present invention and the comparative product are compared.
It was found that, while staying at around 0 degrees, Examples 1 and 2 satisfied the required characteristics in a wide temperature range of around 50 degrees. Incidentally, the tan δ peak value of Example 3 is:
The temperature range was slightly lower than the tan δ peak value of Comparative Example 1, and the temperature range satisfying the required characteristics was divided into two.

The measurement results will be further described with reference to FIGS. First, as described above, the first embodiment
And 2 exhibited two tan δ peaks because the polar substance dispersed in the base polymer contained two or more kinds of functional groups selected from an electron acceptor and an electron donor in the molecule, and thus two kinds of tan δ peaks were obtained. This is because an interaction occurs. As a result, there are two tan δ peak temperatures, and it is presumed that the temperature range affected by the interaction is widened.

Therefore, in Examples 1 and 2, the value of tan δ in the temperature range including the two tan δ peak temperatures was relatively high because the two types of interactions and the optimization of their relative relationships were optimized. It is inferred that this was achieved.

On the other hand, in the third embodiment, as shown in FIG.
The tan δ peak was clearly split into two. this is,
It is presumed that the difference between the two interactions was too large. Therefore, Example 3 shows that tan
Although the δ value divided the required characteristics at around 40 degrees Celsius, if the tan δ value in this temperature range could be slightly increased,
It can be evaluated in that the required characteristics can be satisfied in a temperature range of about 80 degrees.

As described above, the product of the present invention (Examples 1 and 2) is evaluated as extremely good (marked with ◎) because the tan δ value satisfies the required characteristics in a wide temperature range. The product of the present invention (Example 3) has a slightly lower tan δ value, and a decline in the peak shape is observed.

Table 3 shows the measurement results of the material composition and the attenuation characteristics of the products of the present invention (Examples 4 to 8) in which a polar substance was blended with the base polymer.

[0033]

[Table 3]

Each of the products of the present invention (Examples 4 and 5) contains a chlorine-based polymer material, chlorinated polyethylene (trade name “Eraslen 401A”, manufactured by Showa Denko KK) as a base polymer. As a polar substance, a hindered amine light stabilizer is used as a compounding component. The hindered amine-based light stabilizer used in this example is tetrakis (2,2,6,6-tetramethyl-
4-piperidyl) 1,2,3,4-butanetetracarboxylate (trade name “ADK STAB LA57” manufactured by Asahi Denka Kogyo KK), and Example 5 was 1,2,3,4-butanetetracarboxylic acid 1 , 2,2,6,6-penta-methyl-4-piperdinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5,5 Mixed ester with Andecan (Asahi Denka Kogyo Co., Ltd .: trade name "ADK STAB LA63")
P "). Tables 4 and 5 show the structural formulas of these polar substances.

[0035]

[Table 4]

[0036]

[Table 5]

The products of the present invention (Examples 6 to 8) were all made of chlorinated polyethylene (manufactured by Showa Denko KK: trade name "Eraslen 401A") as a base polymer. And as a polar substance,
A benzotriazole-based additive is used as a compounding component. The benzotriazole-based additive used in this example is
Example 6 is N, N'-bis (benzotriazoylmethyl) -diphenylaminomethane (Johoku Chemical Co., Ltd.)
(Trade name: “BTD-DP”), and Example 7 is N, N′-.
Bis (benzotriazoylmethyl) -urea (manufactured by Johoku Chemical Co., Ltd .: trade name "BDT-U");
-(Benzotriazoylmethyl) -urea (trade name "BT-U", manufactured by Johoku Chemical Co., Ltd.). Tables 6 and 7 show the structural formulas of these polar substances.

[0038]

[Table 6]

[0039]

[Table 7]

The manufacturing process of the product of the present invention (Examples 4 to 8)
Since the manufacturing steps are the same as those in Examples 1 to 3, the description thereof will be omitted here. The melt press molding conditions in Examples 4 and 5 were 170 degrees Celsius for 10 minutes, the cooling press molding conditions were 0 degrees Celsius for 5 minutes, and the melt press molding conditions in Examples 6 to 8 were respectively Celsius. 220 degrees, 210 degrees Celsius
Temperature, 200 degrees Celsius for 10 minutes, cooling press molding conditions are:
0 degrees Celsius, 5 minutes.

Next, a high-damping material composition (products 4 to 5 of the present invention)
8) The temperature dependence of the loss elastic modulus E ″ and the storage elastic modulus E ′ was measured in the same manner as in Examples 1 to 3, and using these values, the temperature dependence of tan δ was obtained from Equation 1. Therefore, the result will be described with reference to FIGS. 4 to 8 showing the temperature dependence of the loss elastic modulus E ″, the storage elastic modulus E ′, and tan δ. First, in Example 4, as shown in FIG. 4, tan δ showed a broad temperature dependence. This Example 4 exhibited two tan δ peaks, and the value of tan δ in the temperature range including these tan δ peak temperatures was relatively high. In Example 5, as shown in FIG. 5, only one of the two tan δ peaks is shown, and the temperature range satisfying the required characteristics is slightly narrow.

In the sixth embodiment, as shown in FIG.
δ showed a broad temperature dependence. Example 6
Two tan δ peaks were developed, and the value of tan δ in the temperature range including these tan δ peak temperatures was relatively higher. In Example 7, as shown in FIG. 7, since the two tan δ peak values were slightly lower, the value of tan δ was low overall, and the temperature range satisfying the required characteristics was narrow. In Example 8, as shown in FIG.
The value of tan δ in the temperature range that exhibited peaks and encompassed these tan δ peak temperatures was relatively high, but 2
The value of tan δ in a part (around 45 degrees Celsius) of the temperature range between two tan δ peak temperatures did not satisfy the required characteristics.

As described above, the product of the present invention (Examples 4 and 6) was evaluated as extremely good (marked with ◎) because the tan δ value satisfied the required characteristics over a wide temperature range.
The product of the present invention (Example 8) showed a drop in the peak shape, but was evaluated as good (marked with ○) because tan δ tended to show broad temperature dependence. on the other hand,
The products of the present invention (Examples 5 and 7) are evaluated as slightly poor (marked with △) because the tan δ value is slightly low.

Here, the measurement results according to Examples 4 and 6 showing excellent quality will be further described with reference to the drawings. Examples 4 and 6 exhibited two tan δ peaks because the polar substance dispersed in the base polymer contained two or more functional groups selected from the electron acceptor and the electron donor in the molecule.
This is because the inclusion of two or more species causes two types of interaction. As a result, there are two tan δ peak temperatures, and it is presumed that the temperature range affected by the interaction is widened.

As shown in FIGS. 4 and 6, the two tan δ peak values are relatively high between the tan δ peak values of the respective components alone, and the temperature dependence of tan δ becomes broad. This is presumably because the size of the two tan δ peaks and the temperature difference between the two peaks were properly adjusted. Further, it is inferred that the two tan δ peak temperatures are close to each other because the tan δ peak position has shifted due to the influence of the formed interaction.

Therefore, in Examples 4 and 6, the value of tan δ in the temperature range including the two tan δ peak temperatures was relatively high because of the two types of interaction and their relative magnitudes. It is presumed that this was due to the optimization of the position.

Next, Table 8 shows the measurement results of the material composition and the attenuation characteristics of the products of the present invention (Examples 9 to 11) in which a polar substance was blended with the base polymer.

[0048]

[Table 8]

Each of the products of the present invention (Examples 9 and 10) contains chlorinated polyethylene (a product of Showa Denko KK: trade name "Eraslen 401A") as a base polymer as a blending component. As a polar substance, an isocyanurate-based antioxidant is used as a compounding component. The isocyanurate-based antioxidant used in this example is the same as in Example 9 except that 1,3,5-tris (3,5-di-t-
Butyl-4-hydroxybenzyl) -S-triazine-
2,4,6- (1H, 3H, 5H) -trione (manufactured by Asahi Denka Kogyo Co., Ltd .: trade name "ADK STAB AO20"), and Example 10 was 1,3,5-tris (3,5-di- t-butyl-4-hydroxybenzyl) isocyanurate (trade name “ADK STAB AO18” manufactured by Asahi Denka Kogyo KK). Table 9 shows the structural formulas of these polar substances.

[0050]

[Table 9]

Further, the product of the present invention (Example 11) is a chlorinated polyethylene (manufactured by Showa Denko KK: trade name "Eraslen 401") as a base polymer.
A)) as a compounding component, and as a polar substance, a diester type high molecular weight hindered phenolic antioxidant 3,
9-bis [2 {3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionoxy} 1,1-di-methyl] -2,4,8,10-tetraoxapyrro [5 .5] -Andecan (trade name “ADK STAB AO80” manufactured by Asahi Denka Kogyo Co., Ltd.) as a compounding component. Table 10 shows the structural formula of this polar substance.

[0052]

[Table 10]

The manufacturing process of the product of the present invention (Examples 9 to 11) is the same as the manufacturing process of Examples 1 to 3, and the description thereof will be omitted. The melt press molding conditions in Examples 9 and 10 were 230 ° C. for 10 minutes, the cooling press molding conditions were 0 ° C. and 5 minutes, and the melt press molding condition in Example 11 was 170 ° C. The cooling press molding conditions for 10 minutes are 0 degrees Celsius and 10 minutes.

Next, a high attenuation material composition (Products 9-1 of the present invention)
The temperature dependence of the loss elastic modulus E ″ and the storage elastic modulus E ′ of 1) was measured in the same manner as in Examples 1 to 3, and using those values, the temperature dependence of tan δ was obtained from Equation 1. 9 to 11 showing the temperature dependence of loss elastic modulus E ″, storage elastic modulus E ′, and tan δ.
This will be described with reference to FIG. First, Example 9 exhibited two tan δ peaks as shown in FIG. 9, but the temperature range satisfying the required characteristics was narrow, and the value of tan δ in the temperature range between the two tan δ peak temperatures was Got lower.

In Example 10, as shown in FIG. 10A and FIG. 10B, two tan δ peaks were developed, but the temperature range satisfying the required characteristics was slightly narrowed, and the value of tan δ was Is slightly different. The first peak was shifted to the high temperature side in the high frequency region,
That is, it is supposed that this is due to normal viscoelastic behavior, and the second peak is due to another damping behavior whose position does not depend on frequency. Example 11
As shown in FIG. 11, two tan δ peaks were developed, and the value of tan δ in the temperature range including these tan δ peak temperatures was relatively high, but two tan δ peaks were obtained.
The value of tan δ in a part of the temperature range between the peak temperatures (around 52 degrees Celsius) did not satisfy the required characteristics.

As described above, in the products of the present invention (Examples 10 and 11), the temperature dependence of tan δ dropped, but the tendency that tan δ exhibited a broad temperature dependence was observed. It is evaluated as good (marked with ○). On the other hand, the products of the present invention (Examples 9 and 10) are evaluated as slightly poor (marked with △) because the tan δ value is slightly low.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment.
Various modifications can be made without departing from the spirit of the present invention.

For example, as the base polymer material, 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 / EPDM rubber blend, butyl rubber, brominated butyl rubber, chlorinated butyl rubber, ethylene-vinyl acetate rubber, acrylic rubber, ethylene-acrylic rubber, chlorosulfonated polyethylene, chlorinated polypropylene,
At least one or two or more rubber materials selected from epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, methyl silicone rubber, vinyl-methyl silicone rubber, phenyl-methyl silicone rubber, silicon fluoride rubber, fluorine rubber, or polystyrene At least one or two or more thermoplastic elastomers selected from thermoplastic elastomers, polyvinyl chloride-based thermoplastic elastomers, polyolefin-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and polyamide-based thermoplastic elastomers Materials or polyvinyl chloride, chlorinated polypropylene, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl fluoride, polyvinylidene fluoride, polyacryl Tolyl, polymethyl methacrylate, styrene / acrylonitrile copolymer, acrylonitrile / butadiene / styrene terpolymer, vinyl chloride / vinyl acetate copolymer, acrylic / vinyl chloride graft copolymer, ethylene / vinyl chloride copolymer, At least one or two or more resin materials selected from ethylene / vinyl alcohol and chlorinated vinyl chloride can be used.

That is, the base polymer that can be used in the present invention is a polymer having a polar side chain, and is not particularly limited as long as it is a polymer selected from a rubber material, a thermoplastic elastomer, and a resin material. Generally, it is chlorinated polyethylene.

The polar substance which can be used in the present invention has a functional group selected from an electron acceptor and an electron donor in a molecule.
It is used without any particular limitation as long as it contains at least two kinds and forms at least two kinds of interactions with the polar side chain of the base polymer.
Guanidine-based vulcanization accelerators such as 3-diphenylguanidine and di-O-triguanidine; tetrakis (2, 2, 6,
6-tetramethyl-4-piperidyl) 1,2,3,4-
Hindered amine light stabilizers such as butanetetracarboxylate; and benzotriazole additives such as N, N'-bis (benzotriazoylmethyl) -diphenylaminomethane. The tan δ has a broad temperature dependency due to this interaction.

Further, the optimum amount of the polar substance to be dispersed in the base polymer varies depending on the type and number of the functional groups contained in the polar substance.
0.3 or more based on the volume of the base polymer, specifically 100% by weight based on 100% by weight of the base polymer
It is.

[0062]

According to the high attenuation material composition of the present invention, a polar polymer having two or more functional groups selected from an electron acceptor and an electron donor in a molecule is added to a base polymer material having a polar side chain. Since at least one or two or more substances are dispersed in a predetermined volume ratio, the tan δ of the high attenuation material composition
Two types of interactions are formed, which have an appropriate temperature dependency. Thereby, the high attenuation material composition according to the present invention can exhibit high tan δ in a wide temperature range including the use environment temperature. Therefore, the high-attenuation material composition according to the present invention can be applied to a wide range of fields, such as a sound insulating wall of an acoustic room, a sound insulating partition of a building structure, a sound insulating wall of a vehicle, and is expected to be put to practical use in the future. is there.

[Brief description of the drawings]

FIG. 1 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′, and loss elastic modulus E ″ of a product of the present invention (Example 1).

FIG. 2 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 2).

FIG. 3 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 3).

FIG. 4 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 4).

FIG. 5 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 5).

FIG. 6 is a graph showing temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 6).

FIG. 7 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 7).

FIG. 8 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 8).

FIG. 9 is a graph showing temperature dependence of tan δ, storage elastic modulus E ′ and loss elastic modulus E ″ of the product of the present invention (Example 9).

FIG. 10A is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′, and loss elastic modulus E ″ of the product of the present invention (Example 10).

FIG. 10B is a graph showing the temperature dependence of tan δ, storage modulus E ′ and loss modulus E ″ of the product of the present invention (Example 10).

FIG. 11 is a graph showing the temperature dependence of tan δ, storage elastic modulus E ′, and loss elastic modulus E ″ of the product of the present invention (Example 11).

FIG. 12 is a graph conceptually showing the temperature dependence of tan δ.

Claims (4)

[Claims] 1. A base polymer material having a polar side chain, wherein at least one kind of a polar substance containing two or more kinds of functional groups selected from an electron acceptor and an electron donor capable of binding to the side chain in a molecule, or A high-attenuation material composition, wherein two or more kinds are dispersed. 2. The base polymer material is a 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 / EPDM rubber blend Butyl rubber, brominated butyl rubber, chlorinated butyl rubber, ethylene
Vinyl acetate rubber, acrylic rubber, ethylene-acryl rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated polypropylene, epichlorohydrin rubber,
Epichlorohydrin-ethylene oxide rubber, methyl silicone rubber, vinyl-methyl silicone rubber, phenyl-
At least one or two or more rubber materials selected from methyl silicone rubber, silicon fluoride rubber, and fluorine rubber;
Or, at least one or two or more selected from a polystyrene-based thermoplastic elastomer, a polyvinyl chloride-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a polyurethane-based thermoplastic elastomer, a polyester-based thermoplastic elastomer, and a polyamide-based thermoplastic elastomer. Thermoplastic elastomer material, or polyvinyl chloride, chlorinated polypropylene, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl fluoride, polyvinylidene fluoride, polyacrylonitrile, polymethyl methacrylate, styrene-acrylonitrile Copolymer, acrylonitrile / butadiene / styrene terpolymer, PVC / vinyl acetate copolymer, acrylic
2. The method according to claim 1, comprising at least one resin material selected from a vinyl chloride graft copolymer, an ethylene / vinyl chloride copolymer, ethylene / vinyl alcohol, and chlorinated vinyl chloride. High attenuation material composition. 3. The polar substance is selected from a guanidine-based vulcanization accelerator, a hindered amine-based light stabilizer, a triazole-based additive, an isocyanurate-based antioxidant, and a diester-type high molecular weight hindered phenol-based antioxidant. The high attenuation material composition according to claim 1, wherein the composition is at least one kind or two or more kinds of polar substances. 4. The high attenuation material composition according to claim 1, wherein the volume of the polar substance is at least 0.3 with respect to the volume of the base polymer material.