Silicone composition for vibration damping damper, viscous fluid for vibration damping damper, and vibration damping damper using them

Abstract

To provide a silicone composition for a vibration control damper, a viscous fluid for a vibration control damper, and a vibration control damper using any one of the same, which are less in viscosity variation due to temperature change, can develop high attenuation with a small amount even under a high temperature environment, and furthermore are excellent in work efficiency.SOLUTION: A silicone composition for a vibration control damper contains the following components (B) to (D) with the following component (A) as a main component, a content ratio of the component (B) relative to 100 pts.wt. of the component (A) is 0.00003 to 0.003 pt.wt., and a ratio (M1: M2) of the number of moles (M1) of vinyl groups of the component (A) and the number of moles (M2) of the hydrosilyl groups of the component (D) is controlled to be 1: 0.5 to 1: 4. (A): vinyl group-modified silicone having vinyl groups at both ends of a molecular chain. (B): platinum catalyst. (C): retardants. (D): chain extender.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a silicone composition for a vibration damping damper, a viscous fluid for a vibration damping damper, and a vibration damping damper using them. More specifically, the present invention relates to a silicone composition for a vibration damping damper, a viscous fluid for a vibration damping damper, and a vibration damping damper using them, which are suitable for applications such as seismic isolation and vibration damping in the civil engineering and construction fields.

Background Art

[0002] Vibration damping dampers used in seismic isolation devices and vibration isolation devices in the civil engineering and construction fields, particularly those used in large-scale buildings such as bridges and buildings, are used for the purpose of suppressing vibrations caused by earthquakes, winds, etc., and traffic vibrations caused by the running of large vehicles, etc. In order to absorb the energy of a large earthquake, it is essential to have high attenuation at high strain. However, many small and medium earthquakes occur after a large earthquake. There is an increasing need for characteristic stabilization even for repeated deformations caused by such small and medium earthquakes, such as the long-period earthquakes observed in high-rise buildings. As mechanisms of vibration damping dampers used for such applications, viscoelastic dampers, viscous dampers, oil dampers, steel dampers, etc. are mainly mentioned. Among them, viscous dampers have a large damping force and excellent repeatability, and since only the viscous term exists, the design is simple and they are widely introduced in large-scale facilities such as high-rise buildings.

[0003] As the viscous body used in the above viscous damper, for example, those using polybutene-based materials such as polyisobutylene are generally used (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since polybutene-based materials have a large temperature dependence, in order to obtain high damping performance in a high-temperature environment (30°C or higher), it is necessary to increase the amount of polybutene-based material used in the viscous damper. Therefore, when using a polybutene-based material as the viscous body of a viscous damper, it is necessary to increase the size of the equipment in accordance with the increase in the amount of polybutene-based material used.

[0006] In addition, since polybutene-based materials have a large temperature dependence, when filling a vibration damping damper such as a seismic wall with a polybutene-based material, it can only be filled after once heating it to 130 to 170°C to lower the viscosity of the polybutene-based material. Therefore, there is also a problem that it takes time to heat during construction.

[0007] The present invention has been made in view of such circumstances, and an object thereof is to provide a silicone composition for a vibration damping damper, a viscous fluid for a vibration damping damper, and a vibration damping damper using them, which have little change in viscosity due to temperature changes, can exhibit high damping with a small amount even in a high-temperature environment, and are excellent in workability.

Means for Solving the Problems

[0008] The inventors of the present invention have conducted intensive studies to solve the above problems. In the process of the study, as described above, a viscous damper was adopted as the mechanism of the vibration damping damper, and it was considered to use silicone with a small temperature dependence as the viscous material. Then, various experiments and studies were repeated to obtain a viscous material that has little change in viscosity due to temperature changes, can exhibit high damping with a small amount even in a high-temperature environment, and is excellent in workability. Then, as the above-mentioned viscous material, a material containing vinyl group-modified silicone (A) having vinyl groups at both ends of the molecular chain as the main component, a platinum catalyst (B), a retarder (C), and a chain extender (D) is used. The molar ratio of the vinyl group of the vinyl group-modified silicone (A) to the hydrosilyl group of the chain extender (D) is set to a specific ratio, and the content of the platinum catalyst (B) is suppressed within a specific range. By doing so, while suppressing the temperature dependence, the polymerization reaction (two-dimensional cross-linking reaction) of the (A) component and the (D) component proceeds without variation and the molecular weight increases, resulting in a viscosity more than twice that of the polybutene-based material used in conventional viscous dampers. As a result, it was found that the intended purpose could be achieved, and the present invention was reached.

[0009] However, the gist of the present invention is as follows in [1] to [6]. [1] A silicone composition for a vibration damping damper containing the following component (A) as the main component and the following components (B) to (D), wherein the content ratio of the following component (B) to 100 parts by weight of the following component (A) is 0.00003 to 0.003 parts by weight, and the ratio (M1:M2) of the number of moles (M1) of the vinyl group of the following component (A) to the number of moles (M2) of the hydrosilyl group of the following component (D) in the silicone composition is 1:0.5 to 1:4. A silicone composition for a vibration damping damper characterized by this. (A) Vinyl group-modified silicone having vinyl groups at both ends of the molecular chain. (B) Platinum catalyst. (C) Retarder. (D) Chain extender. [2] The silicone composition for a vibration damping damper according to [1], wherein the content ratio of the above component (C) is 0.01 to 1 part by weight with respect to 100 parts by weight of the above component (A). [3] A viscous fluid for a vibration damping damper, characterized in that the silicone composition for a vibration damping damper according to [1] or [2] is polymerized. [4] The viscous fluid for a vibration damping damper according to [3], having a viscosity of 6000 to 100000 Pa·s at 30°C. A vibration damping damper characterized by being filled with either the silicone composition for a vibration damping damper according to [5], [1] or [2], or the viscous fluid for a vibration damping damper according to [3] or [4]. [6] The vibration damping damper according to [5], which is a seismic isolation wall.

Advantages of the Invention

[0010] From the above, the silicone composition for a seismic isolation damper of the present invention has little change in viscosity due to temperature change, and can exhibit excellent performance as a material for a viscous fluid that exhibits high damping with a small amount even in a high-temperature environment. In addition, since the silicone composition for a seismic isolation damper of the present invention reacts even at room temperature, it can be filled into a vibration damping damper such as a seismic isolation wall in a state of low viscosity, and can be polymerized at room temperature inside the vibration damping damper. Moreover, when filling, there is no need for the trouble of once heating to lower the viscosity and then filling, which is advantageous during construction. And the vibration damping damper of the present invention is filled with the above silicone composition or the above viscous fluid, and since it can exhibit high damping even with a small filling amount, it can be made smaller compared to a viscous damper using a conventional polybutene-based material. Also, since there is little variation in damping performance due to temperature change (particularly, a decrease in damping performance in a high-temperature environment is suppressed), it can exhibit excellent performance as a vibration damping damper.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0012] Next, embodiments of the present invention will be described in detail. However, the present invention is not limited to this embodiment.

[0013] The silicone composition for a vibration damping damper of the present invention (hereinafter, may be simply referred to as "silicone composition") is a silicone composition containing the following component (A) as a main component and the following components (B) to (D), wherein the content ratio of the following component (B) to 100 parts by weight of the following component (A) is 0.00003 to 0.003 parts by weight, and the ratio (M1:M2) of the number of moles (M1) of the vinyl group of the following component (A) to the number of moles (M2) of the hydrosilyl group of the following component (D) in the above silicone composition satisfies 1:0.5 to 1:4. Here, the above "main component" means a component that occupies a ratio exceeding 50% by weight of the total weight of the following components (A) to (D) which are essential components of the silicone composition of the present invention. (A) Vinyl group-modified silicone having vinyl groups at both ends of the molecular chain. (B) Platinum catalyst. (C) Retarder. (D) Chain extender.

[0014] Hereinafter, the constituent materials of the silicone composition of the present invention will be described in detail.

[0015] 《Vinyl group-modified silicone (A) having vinyl groups at both ends of the molecular chain》 As the vinyl group-modified silicone (A) having vinyl groups at both ends of the molecular chain, which is the main component of the silicone composition of the present invention, for example, vinyl group-modified silicone represented by the following general formula (1) is used.

[0016] [Chemical formula]

[0017] In the above general formula (1), n is preferably an integer of 50 to 5000, more preferably an integer of 80 to 4000, and still more preferably an integer of 100 to 3000. That is, if the value of n is too small, the reaction will be too fast, and if the value of n is too large, the reaction will be too slow.

[0018] In addition, the viscosity of the above-mentioned specific vinyl group-modified silicone (A) at 25°C is preferably 400 to 50,000,000 mPa·s. More preferably, the viscosity is 500 to 40,000,000 mPa·s, and even more preferably 1,000 to 1,000,000 mPa·s. That is, when the viscosity is as described above, the damping characteristics are further improved. The viscosity is a value measured at a measurement temperature of 25°C using a rotational rheometer (AR2000ex manufactured by TA Instruments).

[0019] 《Platinum catalyst (B)》 Examples of the platinum catalyst (B) include platinum-olefin complexes, chloroplatinic acid, platinum alone, those in which solid platinum is supported on a carrier (such as alumina, silica, carbon black, etc.), platinum-vinylsiloxane complexes, platinum-phosphine complexes, platinum-phosphite complexes, etc., which are used alone or in combination of two or more kinds. As described above, the content ratio of the platinum catalyst (B) with respect to 100 parts by weight of the above-mentioned specific vinyl group-modified silicone (A) needs to be 0.00003 to 0.003 parts by weight, preferably 0.00006 to 0.0027 parts by weight, and more preferably 0.00009 to 0.0024 parts by weight. That is, by suppressing the content ratio of the platinum catalyst (B) within such a range, while suppressing the rapid progress of the polymerization reaction of the silicone composition of the present invention (the polymerization reaction of component (A) and component (D)), the polymerization reaction can be sufficiently carried out, the variation in the viscosity of the polymer can be suppressed, and a desired viscosity (desired high damping property) can be obtained. In addition, the above-mentioned platinum catalyst (B) may be used in a form dissolved in a solvent such as xylene or toluene. Examples of such commercially available products include SIP6830 manufactured by Gelest. The content ratio of the platinum catalyst (B) is defined as the amount of the platinum catalyst itself without including the above-mentioned solvent.

[0020] 《Retarder (C)》 As the above-mentioned retarder (C), for example, compounds containing an aliphatic unsaturated bond, organic phosphorus compounds, organic sulfur compounds, nitrogen-containing compounds, tin compounds, organic peroxides, etc. are used alone or in combination of two or more.

[0021] Specific examples of the compounds containing an aliphatic unsaturated bond include alcohols containing an aliphatic unsaturated bond such as acetylene alcohol and 1-ethynyl-1-cyclohexanol, and maleic acid esters such as maleic anhydride and dimethyl maleate.

[0022] Specific examples of the above-mentioned organic phosphorus compounds include triorganophosphines, diorganophosphines, organophosphonates, triorganophosphites, etc.

[0023] Specific examples of the above-mentioned organic sulfur compounds include organomercaptans, diorganosulfides, hydrogen sulfide, benzothiazole, thiazole, benzothiazole disulfide, etc.

[0024] Specific examples of the above-mentioned nitrogen-containing compounds include N,N,N',N'-tetramethylethylenediamine, N,N-dimethylethylenediamine, N,N-diethylethylenediamine, N,N-dibutylethylenediamine, N,N-dibutyl-1,3-propanediamine, N,N-dimethyl-1,3-propanediamine, N,N,N',N'-tetraethylethylenediamine, N,N-dibutyl-1,4-butanediamine, 2,2'-bipyridine, etc.

[0025] Specific examples of the above-mentioned tin compounds include stannous halide dihydrate, stannous carboxylate, etc.

[0026] Specific examples of the above-mentioned organic peroxides include di-t-butyl peroxide, dicumyl peroxide, benzoyl peroxide, t-butyl perbenzoate, etc.

[0027] Among the above-mentioned various retarders, from the viewpoint of versatility, compounds containing aliphatic unsaturated bonds are preferred, more preferably alcohols containing aliphatic unsaturated bonds, and particularly preferably acetylene alcohols.

[0028] And, with respect to 100 parts by weight of the above specific vinyl group-modified silicone (A), the content ratio of the above retarder (C) is preferably 0.01 to 1 part by weight, more preferably in the range of 0.05 to 0.5 part by weight. That is, by adding the retarder (C) within the above range, the polymerization reaction between the component (A) and the component (D) is suppressed from proceeding rapidly, the variation in the viscosity of the polymer is suppressed, and a desired viscosity (desired high damping property) can be obtained.

[0029] 《Chain extender (D)》 Examples of the above chain extender (D) include low molecular weight compounds having hydrosilyl groups (Si-H groups) at both ends of the molecular chain, such as those represented by the following general formula (2).

[0030]

Chemical formula

[0031] In the above general formula (2), n is preferably an integer of 1 to 100, more preferably an integer of 1 to 90, and still more preferably an integer of 1 to 80. That is, if the value of n is too small, the reaction will be too fast, and if the value of n is too large, the reaction will be too slow.

[0032] And, in the silicone composition of the present invention, as described above, the ratio (M1:M2) of the number of moles (M1) of the vinyl groups of the above specific vinyl group-modified silicone (A) to the number of moles (M2) of the hydrosilyl groups of the above chain extender (D) needs to be in the range of 1:0.5 to 1:4. M1:M2 is preferably 1:0.8 to 1:3.5, more preferably 1:1 to 1:3. That is, by blending the specific vinyl group-modified silicone (A) and the chain extender (D) at the above ratios, the desired viscosity can be obtained.

[0033] In the silicone composition of the present invention, in addition to the components (A) to (D) above, various additives such as fillers, liquid polymers other than silicone, antifoaming agents, rheology control agents, internal adhesives, coupling agents, etc. may be blended as long as the effects of the present invention are not impaired, as necessary.

[0034] Examples of the filler include carbon black, silica, talc, calcium carbonate, carbon fiber, carbon nanotube, etc., and these may be used alone or in combination of two or more.

[0035] The content ratio of the filler appropriately blended in the silicone composition of the present invention is preferably in the range of 1 to 100 parts by weight, more preferably in the range of 5 to 50 parts by weight, based on 100 parts by weight of the specific vinyl group-modified silicone (A). With such a content ratio, the damping characteristics are further improved.

[0036] Examples of the liquid polymer other than silicone include liquid isoprene rubber (liquid IR), liquid butadiene rubber (liquid BR), liquid styrene-butadiene rubber (liquid SBR), liquid styrene-isoprene rubber (liquid SI), liquid styrene-ethylene-propylene rubber (liquid SEP), liquid isoprene-butadiene rubber (liquid IR-BR), etc., and these may be used alone or in combination of two or more.

[0037] The content ratio of the liquid polymer appropriately blended in the silicone composition of the present invention is preferably in the range of 1 to 100 parts by weight, more preferably in the range of 5 to 50 parts by weight, based on 100 parts by weight of the specific vinyl group-modified silicone (A). With such a content ratio, the damping characteristics are further improved.

[0038] The silicone composition of the present invention can be prepared, for example, by kneading and stirring the components (A) to (D) and, if necessary, other components, etc. in an atmosphere of 5 to 35°C using a blade stirrer, a kneader, a planetary mixer, a mixing roll, a twin-screw stirrer, etc. The silicone composition of the present invention thus obtained undergoes a reaction (polymerization) even at room temperature (5 to 35°C) and becomes a viscous fluid. Therefore, it can be filled into a vibration damping damper such as a seismic wall in a state of low viscosity immediately after the above preparation, and polymerized at room temperature in the vibration damping damper. Moreover, when performing the above filling, there is no need for the trouble of once heating to lower the viscosity and then filling as in the prior art, which is advantageous in construction. In addition, the silicone composition of the present invention prepared as described above does not undergo polymerization (does not become a viscous fluid) for about 12 hours depending on the temperature from immediately after the above preparation. Therefore, it is also possible to transport the previously prepared silicone composition to the construction site and use it. The above silicone composition becomes a viscous fluid (viscous fluid for vibration damping damper) with the polymerization reaction (two-dimensional cross-linking reaction) of the component (A) and the component (D) completed and polymerization achieved by standing still in an atmosphere of 5 to 35°C for 1 to 24 hours.

[0039] Here, the viscous fluid (viscous fluid for vibration damping damper) of the present invention preferably has a viscosity of 6000 to 100000 Pa·s at 30°C. And the above viscosity is more preferably 6500 to 80000 Pa·s, and even more preferably 7000 to 60000 Pa·s. That is, when showing the above viscosity, the damping characteristics are further improved. The above viscosity is a value measured at a measurement temperature of 30°C using a rotational rheometer (AR2000ex manufactured by TA Instruments).

[0040] In addition, in the viscous fluid (viscous fluid for a vibration damping damper) of the present invention, the weight average molecular weight (Mw) of the polymerization reactant of component (A) and component (D) is preferably from 80,000 to 2,000,000, more preferably from 100,000 to 1,800,000. That is, when the weight average molecular weight is as described above, the damping characteristics are further improved. In addition, from the viewpoint of more effectively exerting the effects of the present invention, the molecular weight distribution (weight average molecular weight (Mw) / number average molecular weight (Mn)) of the above polymerization reactant is preferably from 1.5 to 40, more preferably from 2 to 30. The above weight average molecular weight (Mw) is the weight average molecular weight in terms of standard polystyrene molecular weight, and is measured by using three columns of high performance liquid chromatography (manufactured by Waters, "Waters 2695 (main body)" and "Waters 2414 (detector)"), column: Shodex GPC KF-806L (exclusion limit molecular weight: 2×10 7 , separation range: 100 to 2×10 7 , theoretical plate number: 10,000 plates / book, filler material: styrene-divinylbenzene copolymer, filler particle size: 10 μm) connected in series. The number average molecular weight (Mn) is also measured by the same method, and the molecular weight distribution (weight average molecular weight (Mw) / number average molecular weight (Mn)) of the above polymerization reactant is obtained from the above number average molecular weight (Mn) and weight average molecular weight (Mw).

[0041] And as the vibration damping damper filled with the silicone composition of the present invention or the viscous fluid of the present invention prepared as described above, for example, a seismic isolation wall shown in FIG. 1 can be mentioned.

[0042] FIG. 1 is a perspective view schematically showing an example of a seismic isolation wall. The illustrated seismic isolation wall 1 is composed of a hanging wall 2 formed of one or a plurality of plates fixed to the framework of the upper floor building structure and hanging down, separated from the framework of the lower floor building structure, and a plurality of plates fixed to the framework of the lower floor building structure in parallel with the hanging wall 2 and rising up so as to surround the hanging wall 2, separated from the framework of the upper floor building structure. The gap between the rising walls 3 is filled with the silicone composition of the present invention or the viscous fluid of the present invention. In the case of the seismic isolation wall 1 having the structure shown in FIG. 1, from the viewpoint of the manufacturing process of the seismic isolation wall 1, it is preferable to fill the gap between the hanging wall 2 and the rising wall 3 with the silicone composition of the present invention and then carry out a polymerization reaction to obtain a viscous fluid.

[0043] As materials constituting the hanging wall 2 and the rising wall 3 in the seismic isolation wall 1, in addition to steel plates, fiber reinforced resin plates can be used. Examples of the fiber reinforced resin plate include resin plates in which thermosetting resins such as unsaturated polyester resins and epoxy resins, or thermoplastic resins such as polyamides, polypropylenes, and ABS resins are used as matrix resins, and glass fibers, carbon fibers, boron fibers, alumina fibers, amide fibers, etc. are dispersed therein.

[0044] Furthermore, as a specific structure of the seismic isolation wall 1, bolt holes are formed at predetermined intervals along the horizontal and vertical directions of the seismic isolation wall 1 to penetrate the hanging wall 2 and the rising wall 3 (not shown), and gap adjusting bolts for maintaining the gap between the two walls are inserted into the bolt holes of both walls and screwed with nuts, and the size of the gap between the two walls can be adjusted according to the screwing length of the gap adjusting bolts into the nuts.

[0045] Also, the filling of the silicone composition of the present invention into the seismic isolation wall 1 can be carried out before or after the hanging wall 2 is built into the rising wall 3, and the method is not particularly limited. As a filling method before building in, for example, a long inflow pipe is attached from the upper part of the rising wall 3 into the wall to pour and fill the silicone composition of the present invention, or a plurality of inlets are provided at the lower part of the rising wall 3 (not shown), and the silicone composition of the present invention is filled using a pump such as a grout injector from the inlets. By these methods, as shown in FIG. 2, after the filling of the silicone composition (silicone composition 4) of the present invention into the rising wall 3 is completed, the hanging wall 2 is built into the rising wall 3, and the polymerization reaction of the silicone composition 4 is carried out (to become a viscous fluid), the seismic isolation wall 1 is completed. Regarding the filling time, it can be carried out at any time, such as filling the silicone composition 4 in advance and transporting it to the construction site, or mixing and filling it at the construction site. When filling the silicone composition 4 after installing the hanging wall 2 against the rising wall 3, it is preferable to apply a method of providing an injection port at the lower part of the rising wall 3 and injecting.

[0046] The vibration damping damper of the present invention is not particularly limited to the shape shown above. As long as it uses the silicone composition of the present invention or the viscous fluid of the present invention, various shapes can be given. And the vibration damping damper of the present invention can exhibit excellent functions as a seismic damping damper for civil engineering and construction, a vibration damping damper for household appliances and electronic devices, etc. Among them, as a seismic damping damper used for large-scale buildings such as bridges and buildings, especially as a seismic damping damper for high-rise buildings, it can exhibit more excellent functions.

Examples

[0047] Next, the examples will be described together with the comparative examples. However, the present invention is not limited to these examples as long as it does not exceed the gist thereof.

[0048] First, prior to the examples and comparative examples, the following materials were prepared. Note that each numerical value shown in the following materials is a value measured based on the above measurement method.

[0049] 〔Both-terminal vinyl group-modified silicone (i)〕 Both-terminal vinyl group-modified silicone with n = 400 to 600 represented by the following general formula (1) (Polymer VS 10000 (viscosity at 25°C: 10000 mPa·s), manufactured by Evonik Corporation)

[0050]

Chemical formula

[0051] [Bis-terminal vinyl group-modified silicone (ii)] Bis-terminal vinyl group-modified silicone represented by the following general formula (1), with n = 100 to 300 (Polymer VS 2000 (viscosity at 25°C: 2000 mPa·s), manufactured by Evonik)

[0052] [Chemical formula]

[0053] [Chain extender (i)] Chain extender represented by the following general formula (2), with n = 1 to 18 (DMS-H11, manufactured by Evonik)

[0054] [Chemical formula]

[0055] [Chain extender (ii)] Chain extender represented by the following general formula (2), with n = 20 to 40 (DMS-H21, manufactured by Evonik)

[0056] [Chemical formula]

[0057] [Platinum catalyst] SIP6830, manufactured by Gelest

[0058] [Retarder] 1-Ethynyl-1-cyclohexanol (manufactured by Tokyo Chemical Industry)

[0059] [Examples 1 - 8, Comparative Examples 1 - 4] Each component shown in Tables 1 and 2 below was blended at the ratios shown in the same tables, and the target silicone composition was prepared by stirring with a blade stirrer under an atmosphere of 25°C. Note that "M1:M2" shown in Tables 1 and 2 below represents the ratio of the number of moles of vinyl groups (M1) of the vinyl group-terminated silicone to the number of moles of hydrosilyl groups (M2) of the chain extender in the silicone composition. Also, the content ratio of the platinum catalyst shown in Tables 1 and 2 below represents the content ratio of the platinum catalyst itself excluding solvents and the like contained in the drug (SIP6830).

[0060] Then, using the silicone compositions of the examples and comparative examples, the following respective properties were measured and evaluated according to the following criteria. These results are also shown in Tables 1 and 2 below.

[0061] ≪Viscosity≫ After allowing the silicone composition prepared above to undergo a polymerization reaction at 25°C for 1 day, the viscosity was measured at a measurement temperature of 30°C using a rotational rheometer (AR2000ex manufactured by TA Instruments).

[0062] ≪Temperature Dependence≫ After allowing the silicone composition prepared above to undergo a polymerization reaction at 25°C for 1 day, the viscosity was measured at a measurement temperature of 10°C using a rotational rheometer (AR2000ex manufactured by TA Instruments). Then, the above measurement was also performed at a measurement temperature of 30°C, and "viscosity at a measurement temperature of 10°C / viscosity at a measurement temperature of 30°C" was calculated.

[0063] ≪Reaction Rate (t10)≫ The viscosity of the silicone composition prepared above was measured at 100°C for 600 seconds using a rotorless rheometer (manufactured by Toyo Seiki Co., Ltd.), and the time (t10 [seconds]) at which the torque value reached 10% of the torque value at the completion of the reaction was measured, and this value was defined as the reaction rate (t10).

[0064] <Evaluation> As a result of the above respective measurements, those that satisfied all the requirements such as a viscosity of 6000 to 100000 Pa·s, a temperature dependence of 2 or less, and a reaction rate (t10) of 250 to 400 seconds were evaluated as "○", and those that did not satisfy even one of these requirements were evaluated as "×".

[0065]

Table 1

[0066]

Table 2

[0067] From the results of Table 1 and Table 2 above, it can be seen that for the samples of the examples, since the viscosity of the viscous fluid after the completion of the polymerization reaction is high (6000 - 100000 Pa·s), the damping property is high. Furthermore, since the temperature dependence of the viscous fluid is low, it can be seen that the change in viscosity due to temperature change is small. And since the reaction rate of the silicone composition of the examples is also within the range of 250 - 400 seconds, the polymerization reaction (two-dimensional cross-linking reaction) proceeds uniformly to form a high molecular weight, and the physical properties required by the present invention as described above can be obtained.

[0068] On the contrary, for the sample of Comparative Example 1, since it does not contain a platinum catalyst, the polymerization reaction does not proceed and the desired viscosity is not obtained. For the sample of Comparative Example 2, since there is too much platinum catalyst, the reaction rate increases too much, resulting in variations in the viscosity of the polymer, so it cannot be used in the actual manufacturing process. For the sample of Comparative Example 3, in "M1:M2", since M2 is too much, the formation of high molecular weight (rubberization) proceeds too much and becomes too hard, and viscosity etc. could not be measured. For the sample of Comparative Example 4, in "M1:M2", since M2 is too little, the polymerization reaction does not proceed and the desired viscosity is not obtained.

Industrial Applicability

[0069] The silicone composition for a vibration damping damper and the viscous fluid for a vibration damping damper of the present invention can exhibit excellent functions when used in seismic dampers for civil engineering and construction, vibration damping dampers for home appliances and electronic devices, etc. Among them, when used in seismic dampers used in large buildings such as bridges and buildings, especially in seismic dampers for high-rise buildings, more excellent functions can be exhibited. In addition, the damping damper of the present invention can also be used as a damping damper for a seismic isolation device such as a seismic isolation wall for buildings, a vibration damping material and shock absorber for home appliances and electronic devices, and a vibration damping material and shock absorber for automobiles, by using the silicone composition for the damping damper and the viscous fluid for the damping damper of the present invention.

Explanation of Symbols

[0070] 1 Seismic isolation wall 2 Hanging wall 3 Upright wall 4 Silicone composition

Claims

1. A silicone composition for a vibration damping damper for obtaining a viscous fluid for a vibration damping damper, which contains the following component (A) as a main component and the following components (B) to (D), wherein the content ratio of the following component (B) to 100 parts by weight of the following component (A) is 0.00003 to 0.003 parts by weight, and the number of moles of vinyl groups of the following component (A) in the silicone composition (M 1 ), and the ratio (M 2 ) of the number of moles of hydrosilyl groups of the following component (D) (M 1 : M 2 ) is 1:0.5 to 1:

4. The silicone composition for a vibration damping damper is characterized by this. (A)A vinyl group-modified silicone having vinyl groups at both ends of the molecular chain. (B)A platinum catalyst. (C)A retarder. (D)A chain extender.

2. The silicone composition for a vibration damping damper according to Claim 1, wherein the content ratio of the component (C) is 0.01 to 1 part by weight with respect to 100 parts by weight of the component (A).

3. A viscous fluid for a vibration damping damper, characterized in that the silicone composition for a vibration damping damper according to Claim 1 or 2 is polymerized.

4. The viscous fluid for a vibration damping damper according to Claim 3, having a viscosity at 30 °C of 6000 to 100000 Pa·s.

5. A vibration damping damper, characterized in that it is filled with any one of the silicone composition for a vibration damping damper according to Claim 1 or 2 and the viscous fluid for a vibration damping damper according to Claim 3 or 4.

6. The vibration damping damper according to Claim 5, which is a seismic wall.

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