JP2002146106A - Seismic isolation rubber laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic isolation rubber laminate having high damping characteristics as seismic isolation supports, small temperature dependence of elasticity characteristics and excellent processability of a rubber composition providing a rubber layer. SOLUTION: This seismic isolation rubber laminate 10 is formed by using a rubber composition prepared by compounding at least one kind of asphalts, tars and pitches in an amount of 1-70 pts.wt. based on 100 pts.wt. of a rubber material and further compounding at least one kind of a >=21C saturated or a >=21C unsaturated fatty acid in an amount of 1-15 pts.wt. based on 100 pts.wt. of the rubber material as rubber layers 16 in the seismic isolation rubber laminate 10 composed by alternately laminating rigid plates 14 having rigidity and the rubber layers 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation rubber laminate, and more particularly to a seismic isolation rubber laminate for supporting structures such as civil engineering and buildings, and more particularly, a bridge suitably used for supporting a bridge to a pier. It is related to a seismic isolation rubber laminate (support body).

[0002]

2. Description of the Related Art Conventionally, a rubber bearing, which is a seismic isolation rubber laminate, which has been used for supporting structures in the fields of civil engineering and construction, is interposed between an upper structure and a lower structure. However, since the weight of these structures is extremely large, a rigid plate having rigidity such as a metal plate and a rubber layer are usually laminated to form a laminate structure. Therefore, it can be used for building anti-vibration support or seismic isolation support, bridge load support, and seismic isolation support.
The function as a rubber bearing can be effectively performed.

More specifically, for example, as shown in FIG. 1, a seismic isolation rubber laminate 10 is such that a plurality of metal plates 14 as hard plates are embedded in a rubber block 12 at predetermined intervals. With such a structure, such a metal plate 14 and a rubber layer 16 which is a portion of the rubber block 12 located between the metal plates 14 and 14 are alternately and integrally laminated, and A metal upper mounting plate 18 and a lower mounting plate 20 are fixed to the upper and lower portions of the rubber block 12, respectively. Then, such a seismic isolation rubber laminate 10 is sandwiched and disposed between the upper structure such as a bridge and the lower structure such as a pier on the upper mounting plate 18 and the lower mounting plate 20 to be fixed. As a result, a heavy-weight upper structure such as a concrete pier is supported, so that the original function as a seismic isolation rubber laminate can be achieved. That is, the deflection and displacement caused by the influence of weight and acceleration by an earthquake, a strong wind or a vehicle passing over a bridge are absorbed by the cushioning action of the rubber laminate in the shear direction, and the vibration in the vertical direction is also absorbed by the rubber laminate. It can be absorbed by the action.

By the way, it is naturally desirable that the seismic isolation rubber laminate having the above-described structure has a high damping characteristic. It is easy to be exposed to a wide temperature range, and especially in the case of a bridge support used for supporting a bridge on a pier, under severe natural environment from a temperature below freezing to a temperature far exceeding 30 ° C. From the fact that it will be placed, that the temperature dependence of the elastic modulus is small,
desirable.

However, in a conventional seismic isolation rubber laminate, a rubber composition such as a natural rubber (NR) is simply compounded with an appropriate vulcanizing agent as a rubber composition for providing the rubber layer (rubber block). From the place where the usual rubber composition is used, in addition to the fact that the damping properties are not yet sufficient, if a conventionally known component that is said to improve such damping properties is blended, There is an inherent problem that the temperature dependence of the elastic coefficient becomes relatively large, and the characteristics of the seismic isolation rubber laminate, particularly the elastic characteristics, are affected by the ambient temperature.

[0006] For this reason, the applicant of the present application firstly
Japanese Patent Application No. 11-117957 discloses a seismic isolation rubber lamination using a rubber composition obtained by mixing at least one of asphalts, tars and pitches with a predetermined rubber material in a predetermined ratio. By forming the rubber layer of the body, it has been clarified that the damping property can be advantageously improved while keeping the temperature dependency in the elastic property small. As for the body, as a result of further studies by the present inventors,
By compounding the rubber composition such as the asphalts,
New problems such as a decrease in the processability of the rubber composition during formation of the rubber layer (rubber block) of the seismic isolation rubber laminate, such as kneading processability and molding processability, resulting in undesirable effects on productivity. Was found to be induced.

[0007]

The present invention has been made in view of such circumstances, and a problem to be solved is to alternately laminate a rigid plate having rigidity such as a metal plate and a rubber layer. A seismic isolation rubber laminate having a laminated structure having high damping properties for seismic isolation bearings, low temperature dependence of elastic properties, and processability of a rubber composition providing a rubber layer It is an object of the present invention to provide a seismic isolation rubber laminate having excellent characteristics.

[0008]

According to the present invention, in order to solve such a problem, a seismic isolation rubber laminate in which rigid plates having rigidity and rubber layers are alternately laminated is provided. The rubber layer contains at least one of asphalts, tars, and pitches in a proportion of 1 to 70 parts by weight with respect to 100 parts by weight of the rubber material, and has a saturated carbon number of 21 or more. Or a seismic isolation rubber laminate characterized by being formed using a rubber composition obtained by further blending at least one of unsaturated fatty acids at a ratio of 1 to 15 parts by weight. Things.

That is, in such a seismic isolation rubber laminate according to the present invention, the rubber composition for providing a rubber layer positioned between hard plates such as a metal plate is added to a rubber composition of asphalts, tars and pitches. At least one of
It has a great feature in that it is combined with at least one of saturated or unsaturated fatty acids having 21 or more carbon atoms and blended at a predetermined ratio. In short, in the present invention, a high damping property and a small temperature dependency in elastic properties such as an elastic modulus can be obtained by mixing a specific amount of at least one of asphalts, tars and pitches. Not only can be achieved in a compatible manner, but also by blending at least one of saturated or unsaturated fatty acids having 21 or more carbon atoms in a specific amount, the high attenuation characteristic and the small The kneading processability, molding processability, and the like of the rubber composition could be advantageously improved without significantly affecting the temperature dependency.

According to one preferred embodiment of the seismic isolation rubber laminate according to the present invention, the rubber composition is used in an amount of 50 to 50 parts by weight based on 100 parts by weight of the rubber material.
It is desirable that the rubber composition further contains 150 parts by weight of carbon black, whereby the rubber composition has sufficient processability and has an effect on the temperature dependency due to the inclusion of components such as asphalt. Can be effectively buffered or avoided, and the desired elastic properties can be advantageously achieved.

In another preferred embodiment of the base-isolated rubber laminate according to the present invention, a plasticizer having a freezing point of −30 ° C. or less is added to the rubber composition in an amount of 100% by weight of the rubber material. 1 to 50 parts by weight per part by weight. That is, by incorporating such a specific plasticizer in a predetermined amount into the rubber composition, the effective damping characteristics exhibited by the incorporation of components such as asphalts as described above are maintained at a high level, and the temperature dependence is reduced. In addition, it can be reduced more advantageously.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A seismic isolation rubber laminate according to the present invention typically has a structure as shown in FIG. By a plurality of metal plates 14 arranged at a predetermined interval,
The rubber layer 16 is formed, and thus, the metal plate 14 and the rubber layer 16 have a laminated structure in which the rubber plates 16 are alternately laminated. The constituent rubber block 12 (specifically,
The rubber layer 16) is formed using a specific rubber composition according to the present invention.

That is, such a rubber composition contains asphalts and 100 parts by weight of a predetermined rubber material.
Along with at least one of tars and pitches,
A saturated or unsaturated fatty acid having 21 or more carbon atoms,
In other words, at least one of saturated or unsaturated higher fatty acids having a total number of carbon atoms in the molecule of 21 or more is blended in a predetermined ratio, and the present invention is characterized by There are salient features.

Here, the asphalts, tars and pitches are all compounded as components for improving or improving the damping characteristics while preventing or suppressing the deterioration of the temperature dependency in the elastic characteristics. Thus, in the present invention, one or more of them are used in combination. Among such damping property improving components, as asphalts, for example, in addition to various natural asphalts, straight asphalt, blown asphalt, petroleum asphalt such as cutback asphalt, and the like are used, and as tars , Coal tar, butt rock tar, wood tar, oil gas tar,
Petroleum tar, refined tar and the like are used, and as pitches, coal tar pitch, wood tar pitch, rosin pitch and the like are used. And among them, it is preferable to use asphalts and pitches having a softening point of 110 ° C. or higher, and more advantageously, the use of natural asphalt having such a softening point is particularly recommended, As a result, a higher damping characteristic and a smaller temperature dependence of the elastic characteristic can be achieved at the same time.

The amount of this kind of component for improving the damping characteristics is appropriately determined according to the desired damping characteristics. In order to sufficiently enhance the damping characteristics by the combination, It is necessary to mix at least 1 part by weight, preferably 5 parts by weight or more, more preferably 20 parts by weight or more with respect to 100 parts by weight of the rubber material. Also, too much formulation,
From the point that the temperature dependency of the elastic characteristic of the rubber block 12 to be formed is deteriorated, the rubber material 100
The mixing ratio is 70 parts by weight or less, preferably 60 parts by weight or less based on parts by weight.

On the other hand, in the present invention, a saturated fatty acid having 21 or more carbon atoms or an unsaturated fatty acid having 21 or more carbon atoms is added to the rubber composition as a specific higher fatty acid together with such a damping characteristic improving component. However, here, the saturated fatty acid or unsaturated fatty acid having 21 or more carbon atoms is referred to as a saturated fatty acid having 20 or less carbon atoms when the rubber composition is blended with a saturated fatty acid or the like having 20 or less carbon atoms. This is because the temperature dependence of the elastic properties of the rubber block 12 formed from the natural rubber composition becomes worse. Therefore, by blending a saturated fatty acid or unsaturated fatty acid having 21 or more carbon atoms into the rubber composition, the high damping property exerted by the above-described damping property improving component and the small temperature dependency in the elastic property are greatly inhibited. Without this, the processability of the rubber composition, which is reduced by the damping property improving component, such as kneading processability and molding processability, can be improved to a practically advantageous degree.

That is, the compounding of the specific higher fatty acid according to the present invention improves the kneading property in the kneading step of the rubber composition in the production of the seismic isolation rubber laminate 10 as described in detail below. The kneading time can be advantageously reduced, and the rubber can be effectively prevented from burning due to a rise in the temperature of the kneaded rubber. In the case of being compounded with the rubber composition, the compounding agent is uniformly dispersed in the rubber composition, so that desired characteristics can be sufficiently exhibited. In addition, in the molding process of the rubber composition, injection molding property, extrusion molding property, calendar dispensing property, etc. are excellent, and when molding using a mold is performed, the obtained product (seismically isolated rubber laminate) is obtained. The mold release of the body 10) is improved, and the rubber layer 16 in a high-temperature atmosphere is improved.
As a result, the tear strength of the rubber layer 16 when the product is taken out from the mold can be effectively prevented. In addition, there is an advantage that the occurrence of scorch in the rubber composition before vulcanization can be advantageously prevented.

In the present invention, at least one of the specific higher fatty acids as described above is used as a rubber material.
With respect to parts by weight, so that the ratio of 1 to 15 parts by weight,
Preferably, it is blended in a ratio of 5 to 12 parts by weight. However, if the amount of the higher fatty acid is too small, sufficient processability cannot be realized, and if the amount is too large, the metal plate in the rubber block 12 cannot be obtained. 14
Adhesion at the lamination interface between the rubber layer 16 and
This is because the bonding state becomes unstable.

The specific higher fatty acid according to the present invention can be appropriately selected from various kinds of saturated fatty acids or unsaturated fatty acids having 21 or more carbon atoms in one molecule, and used. For example, examples of the saturated fatty acid include behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melicic acid, lacceric acid, and the like. Brassic acid and the like can be mentioned, and one or two or more of them can be used in combination.

In addition, the rubber composition according to the present invention is desirably compounded with carbon black in combination with the above-mentioned specific higher fatty acid, in combination with the above-mentioned damping property improving component, whereby the temperature dependency is improved. Can be more effectively prevented or avoided. The carbon black is generally blended in a proportion of 50 to 150 parts by weight, preferably 70 to 100 parts by weight, based on 100 parts by weight of the rubber material. The reason is that if the amount is too small, the desired elastic properties cannot be sufficiently obtained.If the amount is too large, the kneading processability of the rubber composition and This is because the formability and the like are greatly reduced.

Incidentally, such carbon blacks having a small primary particle diameter, generally JIS-K, which can indirectly indicate the size of the primary particle diameter, can be used.
It is desirable that the nitrogen adsorption specific surface area specified by -6217-1997 is 70 m ² / g or more,
F carbon, ISAF carbon, SAF carbon and the like are preferably used. Among them, SAF carbon having a nitrogen adsorption specific surface area of 130 m ² / g or more is particularly advantageously used. By blending carbon black having such a particle size, not only can it greatly contribute to the improvement of the damping property, but also the effect of improving the processability brought about by the specific higher fatty acid can be maximized. It is.

Further, in the present invention, by adding a plasticizer having a freezing point of -30 ° C. or less to the rubber composition, the effective function provided by the damping property improving component can be maintained. It is also possible to effectively buffer the influence of such components on temperature dependence and to reduce the temperature dependence as much as possible. Examples of such a plasticizer include adipate plasticizers such as dioctyl adipate (DOA), diisodecyl adipate (DIDA), dibutyl glycol adipate and dibutyl carbitol adipate; dibutyl phthalate (DBP), dioctyl phthalate (DOP) Phthalate plasticizers such as dioctyl sebacate (DOS) and dibutyl sebacate (DBS);
Tricresyl phosphate (TCP), cresyl phenyl phosphate (CDP), tributyl phosphate (TBP), trioctyl phosphate (TO
P), Tributoxyethyl phosphate (TBXP)
In addition to phosphate-based plasticizers such as the above, di-2-ethylhexyl azelate (DOZ), di-2-ethylhexyl decanedioate (DODN), and the like can be given, and one or more of them can be used in combination. Will be used.

The plasticizer having such properties is
The rubber material is blended at a ratio of 1 to 50 parts by weight, more preferably at a ratio of 2 to 25 parts by weight, based on 100 parts by weight of the rubber material. This is because, if the amount is too small, the effect of improving the temperature dependency cannot be sufficiently exhibited, while if the amount is too large, the compatibility deteriorates. In the seismic isolation rubber laminate 10 according to
This is because bleeding, which oozes from the outer surface of the (rubber layer 16), is caused.

The rubber material, which is one of the constituents of the rubber composition that provides the rubber layer 16 constituting the seismic isolation rubber laminate 10 according to the present invention, together with the above-mentioned damping property improving component and a specific higher fatty acid, is as follows. Although it will be appropriately selected from various rubber materials conventionally used in the production of a seismic isolation rubber laminate, it is advantageous to use at least one of natural rubber and diene-based synthetic rubber. It is composed as a main component. Further, as the diene-based synthetic rubber, synthetic polyisoprene rubber, styrene / butadiene rubber, polybutadiene rubber, butyl rubber, halogenated butyl rubber, acrylonitrile / butadiene rubber, and the like are used.

As described above, a specific damping characteristic improving component and a specific higher fatty acid are blended in a predetermined ratio with a predetermined rubber material, and carbon black and a plasticizer are mixed in a predetermined amount. A vulcanizing agent such as sulfur is added to the rubber composition blended in the same manner as in the prior art, and if necessary, an appropriate vulcanizing accelerator, a vulcanization accelerating aid such as stearic acid or zinc white is added. Various known rubber compounding agents such as agents, softeners such as oils, waxes, antioxidants and the like are compounded within a usual range and used to form the rubber block 12 that provides the target rubber layer 16. It will be.

In producing the seismic isolation rubber laminate according to the present invention using such a rubber composition, various conventionally known techniques are appropriately employed.
In order to obtain the seismic isolation rubber laminate 10 as shown in (1), after a predetermined rubber composition is kneaded by a closed kneader or the like, a predetermined metal plate is formed using a vulcanization mold. 1
4 or in addition thereto, in the presence of the upper and lower mounting plates 18 and 20, the kneaded rubber composition is injected into the molding cavity by injection or the like, and the rubber block 12 is vulcanized and molded, whereby the metal plate 14 is vulcanized. , 14, a rubber layer 16 is interposed and integrally vulcanized and bonded, or a rubber composition is kneaded and then extruded or calendered by a calender. After forming the rubber layer 16 by dividing it into a thickness and molding it, the obtained rubber layer 16 and a predetermined metal plate 14 are alternately laminated and bonded using an appropriate adhesive. The rubber block 12 is manufactured, and if necessary, the mounting plates 18 and 20 are adhered to the upper and lower surfaces of the rubber block 12 to be integrated with each other.

In the seismic isolation rubber laminate according to the present invention, as a metal plate used as a rigid plate having rigidity, an iron plate or a steel plate excellent in compression resistance can be preferably used. A metal material, a hard plastic plate, or the like can be used as long as it has excellent compression resistance.

Further, as the entire shape of the seismic isolation rubber laminate, an appropriate shape according to the installation form is adopted.
For example, in the planar form, in addition to the square shape and the disc shape, it is also possible to make an elliptical shape, a pentagon, a polygonal shape such as a hexagon, and even if the number of laminations of the metal plate and the rubber layer is not limited, It is determined appropriately according to the use of the seismic rubber laminate.

[0029]

EXAMPLES Hereinafter, some examples of the present invention will be described to clarify the present invention more specifically. However, the present invention imposes some restrictions by the description of such examples. It goes without saying that you don't receive anything. In addition, the present invention, in addition to the following examples, in addition to the above specific description, various modifications based on the knowledge of those skilled in the art, unless departing from the spirit of the present invention,
It should be understood that modifications, improvements and the like can be made.

First, rubber compositions having various compounding compositions shown in the following Tables 1 to 3 (Examples 1 to 16 of the present invention and Comparative Examples 1 and 2)
2) was prepared respectively. In the preparation of such a rubber composition, natural rubber (NR),
Butadiene rubber (BR) or synthetic isoprene rubber (I
R) was used, coal tar pitch was used as the pitch, purified coal tar was used as the tar, and asphalt was used as straight asphalt 80-100 or natural asphalt having a softening point of 120 ° C., respectively. In addition, as a saturated fatty acid having 21 or more carbon atoms, behenic acid, cerotic acid, or montanic acid was used, and as an unsaturated fatty acid having 21 or more carbon atoms, setreic acid, erucic acid, or brassic acid was used. . Furthermore,
A naphthenic process oil or an aroma oil was used as a softening agent, sulfur was used as a vulcanizing agent, and zinc white (ZnO) and stearic acid were used as vulcanization accelerating aids. Furthermore, DOA and DOP in the table indicate dioctyl adipate (freezing point: -60 ° C) and dioctyl phthalate (freezing point:-
50 ° C.), while MSA and TB
T represents N-oxydiethylene-2-benzothiazolesulfenamide and tetrabutylthiuram disulfide as vulcanization accelerators, respectively. Note that SAF carbon and HAF carbon used as carbon black are described in JIS-K-6217-19.
When the nitrogen adsorption specific surface area was measured in accordance with 97, 142.1 m ² / g and 79.6 m
² / g.

Next, using the various rubber compositions obtained as described above, the L-form was obtained in accordance with “6. Mooney viscosity test” in “Physical test method for unvulcanized rubber” of JIS-K-6300-1994. Using a rotor, under the test conditions of a preheating time of 1 minute, a rotation time of the rotor: 3 minutes, and a test temperature of 121 ° C., the respective Mooney viscosities are determined, the following rubber property evaluation test, and 90-degree peeling adhesion are performed. Each test was performed, and the results are shown in Tables 1 to 3 below.

-Rubber Property Evaluation Test- From the various rubber compositions, vulcanization conditions of 150 ° C. × 30 minutes are adopted and specified in JIS-K-6394-1976 “Test method for dynamic properties of vulcanized rubber”. Vulcanized rubber specimen (S ₁
Shape). When producing such a vulcanized rubber test piece, regarding the processability of each rubber composition, ○, ×
In two stages, the evaluation was objective. Next, using each of the obtained test pieces, JIS-K-6394-197 was used.
Test temperature: -10 according to the non-resonant method specified in 6.
Under the conditions of ° C., 20 ° C. and 40 ° C., a test frequency: 0.5 Hz, an average strain (shear): 0%, and a strain amplitude (shear): 175%, load-deflection curves were obtained. Absolute spring constant at measurement temperature: | K ^* | (-10
° C), | K ^* | (40 ° C), and the sine of the loss angle at 20 ° C: sin δ, and the attenuation constant and G
(Temperature dependence) was calculated respectively. Damping constant = (sin δ) / 2 G (temperature dependence) = | K ^* | (−10 ° C.) / | K ^* |
(40 ° C)

-90-degree peel adhesion test- Using the respective rubber compositions and vulcanization conditions of 150 ° C. for 30 minutes, JIS-K-6256-1993, “Vulcanized rubber adhesion test method” "5. 90 pieces of metal pieces and rubber
A test piece as defined in the "peeling test" was prepared using an iron plate as a metal piece. Then, using each of the test pieces thus obtained, JIS-K-6256-199 was used.
According to the test method specified in the above "5. 90 degree peeling test of metal pieces and rubber", the iron plate and the rubber bonded thereto were peeled in the direction of 90 degree, and the maximum value of the peeling force required at that time was determined. The maximum peel force (F _S [N]) was obtained, and the peel strength (T _S [N / mm]) was calculated according to the following equation. T _S = F _S / b (where b [mm] is the width of the iron plate) From the obtained peeling strength (T _S ), the value of T _S for the adhesiveness of each test piece is 7N. / Mm or more: 、, less than 7 N / mm: ×, respectively, were evaluated.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

As is evident from the results of Tables 1 to 3, in the rubber compositions according to Examples 1 to 16 of the present invention, the elastic properties were not significantly affected by the temperature dependency. In addition, it was recognized that this was effective in improving the damping characteristics, and the Mooney viscosity was set to an appropriate value (generally, 3
(Preferably about 0 to 100) and good workability. In addition, in any of the rubber compositions of Examples 1 to 16 of the present invention, since the compounding amount of various specific higher fatty acids is moderate, the adhesiveness between the rubber and the iron plate given by them is given. , It is recognized that it is excellent.

On the other hand, it is recognized that the rubber composition according to Comparative Example 1 containing no specific higher fatty acid according to the present invention has a high Mooney viscosity and poor processability. In addition, in the rubber composition of Comparative Example 2, since the amount of montanic acid, which is a saturated fatty acid having 21 or more carbon atoms, was too large, the adhesion between the rubber made of such a rubber composition and the iron plate was increased. However, it turns out that it is insufficient.

[0039]

As is clear from the above description, in the seismic isolation rubber laminate according to the present invention, both the high damping characteristic and the small temperature dependency in the elastic characteristic can be advantageously realized. In addition, the processability of the rubber composition providing the rubber layer constituting it could be made extremely excellent. Therefore, a seismic isolation rubber laminate having such characteristics can be easily and advantageously manufactured, and it can be advantageously used as a high-damping bearing for a seismic isolation bearing, and can be used for earthquakes, strong winds, Or the deflection and displacement caused by the influence of the weight and acceleration by the vehicle etc. passing on the bridge are effectively absorbed by the cushioning action in the shear direction of the rubber laminate, and the vibration in the vertical direction is further reduced by the cushioning action of the rubber laminate. It can be advantageously absorbed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway explanatory view showing a typical example of a seismic isolation rubber laminate to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Seismic isolation rubber laminated body 12 Rubber block 14 Metal plate 16 Rubber layer 18 Upper mounting plate 20 Lower mounting plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16F 1/40 F16F 1/40 Z // (C08L 21/00 (C08L 21/00 95:00) 95: 00) F-term (Reference) 3J059 AD05 BA43 BC08 BC12 BC19 BD01 BD05 BD09 GA42 4F100 AA37B AB01A AC00B AD00B AH02B AK28 AK73 AM00B AN00B AN01 AN02 AR00A BA02 BA03 BA04 BA05 BA08 CA04B GB07 GB90 JA06 JH12 JK01J06JH12 JK01J06A01 AC071 AC081 AG002 BB181 BB241 DA037 EF056 EH098 EH148 EW048 FD026 FD028 GF00 GL00 GR00

Claims (3)

[Claims] 1. A seismic isolation rubber laminate comprising a rigid plate having rigidity and a rubber layer alternately laminated, wherein the rubber layer is based on 100 parts by weight of a rubber material.
At least one of asphalts, tars and pitches is blended in a proportion of 1 to 70 parts by weight, and at least one of saturated or unsaturated fatty acids having 21 or more carbon atoms is contained in an amount of 1 to 15 parts by weight. Characterized in that it is formed using a rubber composition further blended in the following ratio: 2. The rubber composition according to claim 1, wherein the rubber material comprises
The seismic isolation rubber laminate according to claim 1, further comprising 50 to 150 parts by weight of carbon black with respect to 0 parts by weight. 3. The rubber composition has a freezing point of -3.
3. The seismic isolation rubber laminate according to claim 1, wherein a plasticizer having a temperature of 0 ° C. or lower is further blended in a ratio of 1 to 50 parts by weight with respect to 100 parts by weight of the rubber material.