WO2013014907A1 - Composition pour plot de structure sismique, plot pour structure sismique et structure sismique, ainsi que procédé de fabrication d'une composition pour plot de structure sismique et procédé de fabrication d'un plot pour corps de structure sismique - Google Patents

Composition pour plot de structure sismique, plot pour structure sismique et structure sismique, ainsi que procédé de fabrication d'une composition pour plot de structure sismique et procédé de fabrication d'un plot pour corps de structure sismique Download PDF

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Publication number
WO2013014907A1
WO2013014907A1 PCT/JP2012/004663 JP2012004663W WO2013014907A1 WO 2013014907 A1 WO2013014907 A1 WO 2013014907A1 JP 2012004663 W JP2012004663 W JP 2012004663W WO 2013014907 A1 WO2013014907 A1 WO 2013014907A1
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Prior art keywords
plug
composition
isolation structure
powder
hard resin
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PCT/JP2012/004663
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English (en)
Japanese (ja)
Inventor
洋広 斉藤
裕二 小林
真下　成彦
圭 木村
Original Assignee
株式会社ブリヂストン
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Priority claimed from JP2011165880A external-priority patent/JP5851751B2/ja
Priority claimed from JP2011270563A external-priority patent/JP5869860B2/ja
Priority claimed from JP2011273756A external-priority patent/JP5869863B2/ja
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to CN201280036783.8A priority Critical patent/CN103717939B/zh
Publication of WO2013014907A1 publication Critical patent/WO2013014907A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/823—Temperature control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface

Definitions

  • the present invention relates to a plug composition for a seismic isolation structure used as a support for a seismic isolation device, a plug for a seismic isolation structure using the plug composition, and the plug for a seismic isolation structure
  • This is related to seismic isolation structures using Specifically, the present invention relates to a plug composition capable of providing a plug for a base isolation structure with improved damping performance in a low strain region, and a base isolation structure using the plug composition.
  • the present invention relates to a seismic isolation structure using the plug and the plug for the seismic isolation structure.
  • the present invention also relates to a method for manufacturing a plug composition for a base isolation structure, and a method for manufacturing a plug for a base isolation structure using the plug composition.
  • the present invention uses a method for manufacturing a plug composition capable of providing a plug for a base isolation structure having improved damping performance in a low strain region, and the plug composition.
  • the present invention relates to a method for manufacturing a plug for a base isolation structure.
  • a seismic isolation structure in which a soft plate having viscoelastic properties such as a rubber plate and a hard plate such as a steel plate are alternately laminated has been used as a support for a seismic isolation device.
  • a hollow portion is formed at the center of a laminate composed of a soft plate and a hard plate, and the hollow portion is molded so as to have a uniform composition. There are some which have been pressed into the plug (plug for seismic isolation structure).
  • the plug press-fitted into the laminated body composed of the soft plate and the hard plate is plastically deformed and absorbs vibration energy when the laminated body undergoes shear deformation due to the occurrence of an earthquake.
  • a plug made entirely of lead is often used.
  • lead has a large environmental burden and a high cost for disposal. Therefore, in recent years, an attempt has been made to develop a plug having sufficient damping performance, displacement followability, etc., using a lead substitute material.
  • a plug composition (powder-like material) containing a high-viscosity elastomer composition containing an elastomer component and a powder such as iron powder is added.
  • a plug formed by pressure forming has been proposed (see, for example, Patent Document 1).
  • the conventional plug formed by pressure-molding a powdery plug composition containing an elastomer composition and powder has excellent damping performance and displacement for large deformation, that is, large strain. Shows trackability.
  • the conventional plug described above does not have sufficient damping performance in a low strain region (for example, a region where the shear strain is 50% to 100%) as compared with a lead plug, and has a low It became clear that there is room for improvement in the damping performance in the strain region.
  • the present invention has an object to provide a plug composition for a seismic isolation structure capable of solving the above-described problems of the prior art and providing a plug with improved damping performance in a low distortion region.
  • Another object of the present invention is to provide a seismic isolation structure plug using such a composition and improved damping performance in a low strain region, and a seismic isolation structure using the seismic isolation structure plug. To do.
  • the present inventors have intensively studied to achieve the above object.
  • the present inventors have isolated a composition containing a hard resin having a D hardness (type D durometer hardness) 30 or more higher than that of the elastomer composition.
  • the inventors have found that a seismic isolation structure excellent in damping performance in a low strain region can be obtained by using the body plug, and the present invention has been completed.
  • the plug composition containing the elastomer composition, the powder, and the hard resin is in a powder form suitable for pressure molding depending on the preparation conditions.
  • the plug composition containing a hard resin becomes a block-shaped material depending on the preparation conditions, and the plug exhibits a desired performance. There was a concern that it would be difficult to mold.
  • the present inventors can provide a plug for a seismic isolation structure with improved damping performance in a low strain region, and provide a method for producing a plug composition having excellent moldability. Further study was conducted as a purpose.
  • the inventors of the present invention improve the damping performance in the low strain region by preparing the elastomer composition in advance and kneading it with the powder and the hard resin and keeping the temperature during the kneading within a predetermined temperature range.
  • the present inventors have found that a plug composition having excellent moldability and capable of providing a seismic isolation structure plug can be prepared, and the present invention has been completed.
  • the composition for plugs of the seismic isolation structure of the present invention comprises: (A) an elastomer composition containing at least an elastomer component; (B) powder, (C) a hard resin having a D hardness of 30 or more higher than that of the elastomer composition; It is characterized by containing.
  • D hardness refers to type D durometer hardness measured in accordance with JIS K6253.
  • the D hardness of the hard resin is preferably 60 to 90. If the D hardness of the hard resin is in the range of 60 or more and 90 or less, the damping performance in the low strain region of the plug for a base isolation structure manufactured using the plug composition can be greatly improved. is there.
  • the content of the hard resin is 5 to 10% by volume of the total amount of the elastomer composition, the powder, and the hard resin. It is preferable. If the content of the hard resin is 5% by volume or more of the total amount of the elastomer composition, the powder, and the hard resin, the low strain region of the plug for the seismic isolation structure manufactured using the plug composition This is because the damping performance in the can be greatly improved. Further, if the content of the hard resin is 10% by volume or less of the total amount of the elastomer composition, the powder, and the hard resin, the height of the plug for the seismic isolation structure manufactured using the plug composition is high. This is because a decrease in attenuation performance in the strain region can be suppressed.
  • the hard resin preferably has an average particle size of 200 ⁇ m or less. If the average particle size of the hard resin compounded in the plug composition is 200 ⁇ m or less, the damping performance is further improved in both the low strain region and the high strain region (for example, the region where the shear strain is 50% to 250%). This is because a plug composition capable of producing a seismic isolation structure plug is obtained.
  • “average particle diameter” refers to the number-based median diameter (median diameter) measured by a laser diffraction method in accordance with JIS Z8825-1.
  • the softening point of the said hard resin is 150 degreeC or more as for the composition for plugs of the seismic isolation structure of this invention. This is because, if the softening point of the hard resin is set to 150 ° C. or higher, the temperature dependence of the damping performance of the plug for a base isolation structure manufactured using the plug composition can be reduced.
  • the “softening point” can be measured according to JIS K7206.
  • the softening point of the hard resin refers to the softening point of the hard resin having the lowest softening point when the plug composition includes a plurality of hard resins having different softening points.
  • the shape of the said hard resin is an indeterminate form in the composition for plugs of the seismic isolation structure of this invention. This is because, if the shape of the hard resin is indefinite, the damping performance of the plug for a base isolation structure manufactured using the plug composition can be further improved in both the low strain region and the high strain region.
  • the “indefinite shape” refers to not only one type of shape but also a mixture of shapes having various forms such as those having irregularities and protrusions.
  • the plug for seismic isolation structures of this invention uses any of the composition for plugs of the above-mentioned seismic isolation structure. It is manufactured. Thus, if the composition for plugs mentioned above is used, the plug for seismic isolation structure which is excellent in the damping performance in a low distortion area
  • the present invention has an object to advantageously solve the above-mentioned problems, and the seismic isolation structure of the present invention is formed by alternately laminating a rigid plate having rigidity and an elastic plate having elasticity.
  • a seismic isolation structure comprising a laminate having a hollow portion extending in the laminating direction and a plug press-fitted into the hollow portion of the laminate, wherein the plug is the above-described plug for a seismic isolation structure.
  • this invention aims at solving the said subject advantageously, and the manufacturing method of the composition for plugs of the seismic isolation structure of this invention prepares the elastomer composition which contains an elastomer component at least.
  • the kneading temperature after adding the hard resin is set to a temperature not higher than the softening point of the hard resin.
  • a plug composition capable of producing a plug for a base-isolated structure having excellent damping performance in a low strain region can be obtained.
  • the kneading temperature after addition of the hard resin in the kneading step is set to a temperature not higher than the softening point of the hard resin, the plug composition is suppressed from becoming a block shape and exhibits desired performance.
  • a plug composition capable of easily forming the plug for use is obtained.
  • the elastomer composition can be prepared at a relatively high temperature (temperature exceeding the softening point of the hard resin), so that the plug composition is in a block form.
  • a plug composition in which the compounding component in the elastomer composition is uniformly dispersed can be obtained.
  • D hardness refers to the type D durometer hardness measured according to JIS K6253 as described above.
  • softening point refers to the Vicat softening temperature measured in accordance with JIS K7206.
  • “kneading temperature” refers to the temperature of the material to be kneaded during kneading.
  • the “softening point of the hard resin” means that when a plurality of hard resins having different softening points are blended, the softening point of the resin having the lowest softening point among the blended hard resins. Point to.
  • the powder in the kneading step, is intermittently or continuously divided into a plurality of times with respect to the elastomer composition. In addition to kneading, it is preferable to knead. If the powder is intermittently or continuously added to the elastomer composition and kneaded, compared to the case where the powder is added to the elastomer composition and kneaded at once, the kneading temperature and torque during kneading are reduced. This is because a rapid increase can be suppressed and the dispersion state of the powder in the elastomer composition can be improved.
  • the manufacturing method of the composition for plugs of the seismic isolation structure of this invention is the said kneading
  • the said powder is intermittently added to the said elastomer composition in multiple times, knead
  • the manufacturing method of the plug for seismic isolation structures of this invention is the manufacturing method of the composition for plugs of the seismic isolation structure mentioned above. It includes a pressure molding step of pressure molding a plug composition produced using any of the above in a mold. Thus, if the plug composition manufactured using the above-described method for manufacturing a plug composition is pressure-molded, a seismic isolation structure plug excellent in damping performance in a low strain region can be obtained.
  • the manufacturing method of the plug for seismic isolation structure of this invention WHEREIN: It is preferable to pressure-mold the said composition for plugs at the temperature below the softening point of the said hard resin in the said pressure-forming process. This is because if the plug composition is pressure-molded at a temperature equal to or lower than the softening point, a plug for a seismic isolation structure having further excellent damping performance in a low strain region can be obtained.
  • the plug composition for a seismic isolation structure capable of producing a plug for a seismic isolation structure having excellent damping performance in a low strain region. Furthermore, according to the present invention, the plug for a base isolation structure having excellent damping performance in the low strain region, and the damping performance in the low strain region are equal to or higher than those of the base isolation structure using the lead plug, and the environmental load is reduced. A seismic isolation structure that can be reduced can be provided.
  • a plug for a seismic isolation structure of the present invention it is possible to provide a plug for a seismic isolation structure with improved damping performance in a low strain region, and to formability. An excellent plug composition can be produced. Furthermore, according to the method for manufacturing a plug for a base isolation structure of the present invention, a plug for a base isolation structure having excellent damping performance in a low strain region can be manufactured.
  • the seismic isolation structure according to the present invention is used as a support for the seismic isolation device.
  • the seismic isolation structure plug according to the present invention is used in the seismic isolation structure, and is not particularly limited, and can be manufactured using the method for manufacturing a seismic isolation structure plug according to the present invention.
  • the composition for plug of a base isolation structure according to the present invention is used when manufacturing the above plug for a base isolation structure, and the composition for plug of a base isolation structure according to the present invention is not particularly limited. It can manufacture using this manufacturing method.
  • FIG. 1 shows a cross section along the extending direction of the seismic isolation structure plug of an example of the seismic isolation structure of the present invention using the seismic isolation structure plug of the present invention.
  • a seismic isolation structure 1 having a cross section shown in FIG. 1 is formed by alternately laminating rigid plates 2 having rigidity and elastic plates 3 having elasticity, and has a cylindrical hollow portion extending in the stacking direction (vertical direction).
  • the laminated body 4 at the center, the cylindrical seismic isolation structure plug 5 press-fitted into the hollow part of the laminated body 4, and both ends (upper and lower ends) of the laminated body 4 and the seismic isolation structure plug 5 And a fixed flange plate 6.
  • the outer peripheral surface of the laminated body 4 of the seismic isolation structure 1 is covered with a covering material 7.
  • the rigid plate 2 and the elastic plate 3 constituting the laminated body 4 are firmly bonded by, for example, vulcanization adhesion or an adhesive.
  • the laminated body of the rigid board 2 and an unvulcanized rubber composition is vulcanized, and the vulcanized material of an unvulcanized rubber composition is made into an elastic board.
  • the elastic plate 3 may be molded and the rigid plate 2 and the elastic plate 3 may be vulcanized and bonded simultaneously.
  • a metal plate such as a steel plate, a ceramic plate, a reinforced plastic plate such as FRP, or the like can be used.
  • the elastic plate 3 a vulcanized rubber plate or the like can be used.
  • the laminate 4 may not be covered with the covering material 7, but the outer peripheral surface of the laminate 4 is covered with the covering material 7 from the viewpoint of preventing the deterioration of the laminate 4 due to oxygen, ozone, ultraviolet rays, or the like. Preferably it is covered.
  • the covering material 7 the same material as the elastic plate 3, for example, vulcanized rubber can be used.
  • the seismic isolation structure 1 when a horizontal shearing force is applied due to vibration, the laminate 4 and the seismic isolation structure plug 5 are sheared to effectively absorb vibration energy. Damping vibrations quickly. Moreover, in the seismic isolation structure 1, since the laminated body 4 is configured by alternately laminating the rigid plates 2 and the elastic plates 3, even if a load acts in the laminating direction (vertical direction), the compression is not caused. It is suppressed. And since the seismic isolation structure 1 uses the seismic isolation structure plug 5 using the plug composition of the present invention described in detail below, it exhibits excellent damping performance in a low strain region.
  • composition for plug (Composition for plug) Below, the composition for plugs of the seismic isolation structure of this invention is demonstrated in detail.
  • the plug composition of the present invention is characterized by mixing an elastomer composition containing at least an elastomer component, a powder, and a hard resin having a D hardness of 30 or more higher than that of the elastomer composition.
  • a conventional plug composition containing an elastomer composition and a powder and not containing a hard resin
  • the damping performance of the plug (hereinafter sometimes simply referred to as “plug”) has been improved.
  • the elastomer composition corresponds to the sea portion of the sea-island structure
  • the powder corresponds to the island portion of the sea-island structure.
  • the stress is increased by an amount corresponding to the hardness difference between the elastomer composition and the hard resin by replacing a part of the elastomer composition with the hard resin.
  • the damping performance in the low-strained region of the molded plug (in particular, the load - and intercept load Q d in the distortion hysteresis curve, intercept stress .tau.d) which can improve the it is conceivable that.
  • the damping performance of the plug can also be improved by increasing the amount of powder (for example, iron powder) to be blended in the plug composition.
  • powder for example, iron powder
  • workability may be deteriorated or an elastic plate (for example, a rubber plate) positioned around the plug may be damaged. Therefore, in the plug composition of the present invention, as described above, by adding a hard resin having a D hardness of 30 or more higher than that of the elastomer composition, the damping performance, particularly in the low strain region, is improved.
  • the plug for a base isolation structure using the plug composition containing the elastomer composition, the powder, and the hard resin when the plug is deformed due to the occurrence of an earthquake or the like, the friction between the powders, Vibration is attenuated by friction between hard resins, friction between powder and hard resin, and friction between powder or hard resin and an elastomer component. Therefore, in this plug composition, the friction between hard resins and the friction between the hard resin and the elastomer component or powder are increased, and the damping performance of the plug for the seismic isolation structure using the plug composition is further increased. In order to improve, it is preferable that the average particle diameter of hard resin shall be 200 micrometers or less.
  • this plug composition the area where the hard resins are in contact with each other and the area where the hard resin is in contact with the elastomer component or the powder are increased, the friction between the hard resins, and the hard resin and the elastomer component or In order to increase the friction with the powder, it is preferable to use a hard resin having the above-mentioned average particle diameter.
  • the elastomer composition used for the plug composition includes at least an elastomer component and may further contain a compounding agent such as a reinforcing filler.
  • the elastomer component those exhibiting rubber elasticity at room temperature, for example, rubbers such as natural rubber and synthetic rubber, and thermoplastic elastomers can be used.
  • rubbers such as natural rubber and synthetic rubber
  • thermoplastic elastomers it is preferable to use rubber such as natural rubber and synthetic rubber as the elastomer component.
  • Rubbers such as natural rubber and synthetic rubber are viscoelastic bodies, exhibiting some elasticity, but have great plasticity, can follow large deformations, and can re-aggregate again in the same state when returning to the origin after vibration. Because. Further, when the elastomer component is rubber (that is, when the elastomer composition is a rubber composition), the damping performance of the plug is improved and the durability is also improved.
  • elastomer component examples include natural rubber (NR), polyisoprene rubber (IR), polybutadiene rubber (BR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), and ethylene-propylene.
  • Rubber Nitrile rubber, Butyl rubber, Halogenated butyl rubber, Acrylic rubber, Polyurethane, Silicone rubber, Fluoro rubber, Polysulfide rubber, Hyperon, Ethylene vinyl acetate rubber, Epichlorohydrin rubber, Ethylene-methyl acrylate copolymer, Styrene elastomer, Urethane Examples thereof include elastomers and polyolefin elastomers. These elastomer components may be used alone or in a blend of two or more.
  • the elastomer component is preferably at least partially, preferably all uncrosslinked. That is, when the elastomer component is rubber, the rubber is preferably unvulcanized.
  • the plug formed using the plug composition containing the elastomer component deforms when subjected to a large deformation, but the position of the powder in the plug at the time of deformation. Cannot be changed. Therefore, when the elastomer component is completely cross-linked, the plug cannot follow the deformation at a certain limit point, and the cross-linked elastomer portion breaks or tries to return to its original shape by the repulsive force of the cross-linked elastomer portion. To do.
  • the plug does not return to its original shape even if the plug position returns to the origin, so that the damping performance gradually decreases, and the repulsive force of the cross-linked elastomer part is reduced. If it works, the inherent damping performance of the plug cannot be exhibited.
  • the elastomer component is uncrosslinked, it is possible to follow deformation, and when the plug returns to the origin again after receiving a history of large deformation, hydrostatic pressure is applied to the entire plug. Therefore, the plug can return to its original shape. As a result, it is possible to maintain the same performance as the initial stage over a long period of time.
  • uncrosslinked refers to a state in which the crosslinking reaction has not been completely completed, and includes a partially crosslinked state.
  • the elastomer composition preferably further contains a reinforcing filler.
  • the “reinforcing filler” is a substance that reinforces the elastomer component and has a strong cohesive force between itself and the elastomer component.
  • the reinforcing filler has the effect of increasing the viscosity of the entire elastomer composition due to the binding force when blended with the elastomer component, and as a result, improving the damping performance of the plug.
  • the plug of the seismic isolation structure absorbs the energy generated by the earthquake (for example, converts it into heat, etc.) to exert a damping effect. Therefore, the damping effect increases as the plug flow resistance increases. growing.
  • the flow resistance of the elastomer composition increases (that is, the flow resistance of the plug formed using the elastomer composition increases), sufficient damping performance, It is possible to obtain a plug having displacement followability and the like.
  • the reinforcing filler carbon black and silica are preferable, and carbon black is particularly preferable in that the effect of improving the viscosity of the elastomer composition by interaction with the elastomer component is great.
  • examples of the carbon black include SAF, ISAF, and HAF grades. Among these, fine particles having a large surface area such as those of SAF and ISAF grades are preferable.
  • examples of silica include wet silica, dry silica, and colloidal silica.
  • the compounding amount of the reinforcing filler is preferably in the range of 60 to 150 parts by mass with respect to 100 parts by mass of the elastomer component.
  • the compounding amount of the reinforcing filler in the elastomer composition is less than 60 parts by mass, the viscosity and flow resistance of the elastomer composition are low, and the damping performance of the plug tends to be insufficient.
  • the compounding amount of the reinforcing filler exceeds 150 parts by mass, kneading is difficult, it becomes difficult to prepare a uniform elastomer composition, and the repeated stability of the plug is lowered.
  • the elastomer composition preferably contains a resin other than a resin (hard resin) having a D hardness of 30 or more higher than that of the elastomer composition, for example, a soft resin having a D hardness lower than that of the elastomer composition.
  • a resin hard resin
  • a soft resin having a D hardness lower than that of the elastomer composition.
  • the soft resin preferably has a function as a tackifier.
  • the soft resin include phenol resin, rosin resin, dicyclopentadiene (DCPD) resin, dicyclopentadiene-isoprene copolymer, C5 petroleum resin, C9. Petroleum resins, alicyclic petroleum resins, petroleum resins obtained by copolymerizing C5 fraction and C9 fraction, xylene resins, terpene resins and ketone resins, and modified resins of these resins. These resins may be used alone or in combination of two or more.
  • the blending amount of the soft resin in the elastomer composition is preferably in the range of 20 to 100 parts by mass with respect to 100 parts by mass of the elastomer component.
  • the blending amount of the soft resin is less than 20 parts by mass, the effect of improving the damping performance of the plug during large deformation is small. On the other hand, when it exceeds 100 parts by mass, the processability of the elastomer composition may be deteriorated.
  • additives generally added to the elastomer composition such as an anti-aging agent, wax, plasticizer, and softener can be added to the elastomer composition.
  • an anti-aging agent such as wax, plasticizer, and softener
  • plasticizer phthalic acid, isophthalic acid, adipic acid, tetrahydrophthalic acid, sebacic acid, azelaic acid, maleic acid, fumaric acid, trimellitic acid, citric acid, itaconic acid, oleic acid, ricinoleic acid, stearin Derivatives (for example, esters) such as acid, phosphoric acid, and sulfonic acid; glycols, glycerin, epoxy derivatives, and polymerization plasticizers.
  • esters such as acid, phosphoric acid, and sulfonic acid
  • glycols, glycerin, epoxy derivatives, and polymerization plasticizers such as acid, phosphoric acid, and sulfonic acid
  • glycols, glycerin, epoxy derivatives, and polymerization plasticizers such as acid, phosphoric acid, and sulfonic acid
  • glycols, glycerin, epoxy derivatives, and polymerization plasticizers
  • Softeners include aroma oils, naphthenic oils, paraffinic oils, etc .; castor oil, cottonseed oil, linseed oil, rapeseed oil, soybean oil, palm oil, peanut oil, rosin, pine Vegetable oil-based softeners such as oil; low molecular weight oils such as silicone oil. These softeners may be used alone or in a blend of two or more.
  • the powder used for the plug composition is a material mainly responsible for the damping performance of the plug. Specifically, the friction between the powder, the friction between the powder and the elastomer component, and the powder and the hard resin Vibration energy is attenuated by friction.
  • a powder refers to things other than a reinforcing filler and hard resin. Examples of the powder include metal powder and silicon carbide powder.
  • the damping performance of a plug falls significantly and it cannot obtain sufficient damping performance.
  • metal powder is preferable, and as the metal powder, one having a small environmental load is preferable.
  • the metal powder for example, iron powder, stainless steel powder, zirconium powder, tungsten powder, bronze (CuSn) powder, aluminum powder, gold powder, silver powder, tin powder, tungsten carbide powder, tantalum powder, titanium powder, Examples thereof include copper powder, nickel powder, niobium powder, iron-nickel alloy powder, zinc powder, and molybdenum powder.
  • These metal powders may be used individually by 1 type, and may be used in combination of 2 or more type.
  • metal powders since these metal powders may be metal oxide powders, metal powders such as metal oxide powders can also be suitably used as the powder.
  • iron powder is particularly preferable. This is because iron powder is inexpensive and has high breaking strength as compared with other metal powders. Moreover, since the plug for seismic isolation structure which has iron powder as a main component is neither too hard nor too brittle, it can exhibit the outstanding damping performance over a long period of time. Examples of the iron powder include reduced iron powder, electrolytic iron powder, sprayed iron powder, pure iron powder, and cast iron powder. Among these, reduced iron powder is preferable.
  • the content of the powder in the plug composition is preferably in the range of 50 to 74% by volume, and more preferably in the range of 60 to 74% by volume. Further, (hard resin + elastomer composition) / powder (volume ratio) is preferably in the range of 50/50 to 26/74, and more preferably in the range of 40/60 to 26/74. If the content of the powder in the plug composition is less than 50% by volume, the distance between the powders is too wide, the friction between the powders during deformation, and the flow resistance between the powder and other components Since it becomes small, the damping performance of the plug tends to be insufficient.
  • the content of the powder in the plug composition exceeds 74% by volume
  • the contact between the powders increases, and the repeated durability of the plug decreases.
  • the content of the powder exceeds 74% by volume
  • it is difficult to sufficiently remove air from the plug composition when molding the plug and the volume of the plug is the ideal volume (when there is no air mixing). Volume) and the damping performance of the plug decreases.
  • the content of the powder in the plug composition is 60 to 74% by volume, the plug damping performance can be maintained well, and the displacement followability, repeat stability, and workability are also good.
  • the particle diameter of the powder is preferably in the range of 0.1 ⁇ m to 2 mm, more preferably in the range of 1 ⁇ m to 150 ⁇ m.
  • the particle size of the powder is less than 0.1 ⁇ m, handling is difficult.
  • the particle size of the powder exceeds 2 mm, friction between the powders tends to decrease and the damping effect of the plug tends to decrease.
  • the particle diameter of the powder is 1 ⁇ m or more, handling is easy, and when the particle diameter of the powder is 150 ⁇ m or less, the plug damping performance is sufficiently high.
  • the shape of the powder is preferably indefinite.
  • the indefinite shape means that not only one type of shape such as a spherical shape but also shapes having various forms such as those having irregularities and protrusions are mixed.
  • the shape of the powder obtained by pulverizing the bulk is naturally indeterminate, but when compared to the case of using a spherical powder, the use of the amorphous powder has a better damping effect. Obtained. This is because when an amorphous powder is used, a frictional effect occurs when the powder, friction between the powder and the elastomer component, or between the powder and the hard resin, and a spherical one is used. This is considered to be because the friction is increased compared to the case and the damping performance is improved.
  • the plug composition contains a resin (hard resin) having a D hardness of 30 or more higher than that of the elastomer composition.
  • a resin hard resin having a D hardness of 30 or more higher than that of the elastomer composition.
  • the plug composition becomes hard, and the damping performance in the low strain region of the plug (especially, a load-strain hysteresis curve). and intercept load Q d in, it is possible to improve the intercept stress .tau.d).
  • blended with the composition for plugs has an average particle diameter of 200 micrometers or less.
  • the D hardness of the hard resin is preferably in the range of 60 to 90.
  • the plug composition is sufficiently hard, and the damping performance in the low strain region of the plug can be greatly improved.
  • the average particle diameter of the hard resin is preferably 150 ⁇ m or less.
  • the average particle diameter of the hard resin is preferably 80 ⁇ m or more.
  • the hard resin blended in the plug composition is preferably a resin having a softening point of 150 ° C. or higher. This is because if the softening point of the hard resin is 150 ° C. or higher, even if the plug generates heat due to deformation, the hard resin is difficult to soften, so that the plug can exhibit sufficient damping performance. That is, the temperature dependence of the damping performance of the plug can be reduced.
  • the temperature dependency of the damping performance of the plug in a low temperature region is also improved.
  • the hard resin blended in the plug composition has an irregular shape. If an amorphous hard resin is used, the hard resin acts like a lubricant during friction between hard resins, between hard resin and elastomer components, and between powder and hard resin, and has a low strain (low shear stress) range. However, sufficient friction occurs between the powders. Further, in the high strain (large deformation) region, the amorphous hard resin causes plastic deformation along with the deformation of the plug and contributes to the improvement of the damping performance. That is, if an amorphous hard resin is used, the damping performance is improved in both the low strain region and the high strain region.
  • the indefinite shape means that not only one type of shape such as a spherical shape, but also shapes having various forms such as those having irregularities and protrusions are mixed.
  • the shape of the resin obtained by pulverizing the pellets of the hard resin is naturally indefinite.
  • the above-mentioned hard resins include hydrocarbon plastics polyethylene (PE), polypropylene (PP), polystyrene (PS); engineering plastics polyamide (PA), polyphenylene ether (PPE), polyphenylene ether / polystyrene (PPE). / PS), polysulfone (PSF), polyethersulfone (PES), polyimide (PI), polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polyetherketone (PEEK), polyetherimide (PEI) and the like are preferable.
  • the average particle diameter of these hard resins can be adjusted using known methods, such as crushing and classification.
  • the content of the hard resin is preferably in the range of 5 to 10% by volume of the total amount of the elastomer composition, the powder, and the hard resin. If the content of the hard resin is 5% by volume or more of the total amount of the elastomer composition, powder, and hard resin, the plug composition becomes sufficiently hard, and the damping performance in the low strain region of the plug (In particular, the intercept stress ⁇ d) can be greatly improved. Moreover, if content of hard resin is 10 volume% or less of the total amount of an elastomer component, powder, and hard resin, the fall of the damping performance of the high distortion area
  • the damping performance in the high strain region decreases, but this is because the ratio of the elastomer composition in the plug composition is reduced, and the damping in the high strain region of the plug is reduced. This is because the amount of the soft resin that greatly contributes to the performance is reduced. Therefore, the stress ( ⁇ d) under the low strain region can be effectively improved by hardening the hard resin with a content of about 5 to 10% by volume.
  • the plug composition of the seismic isolation structure of the present invention is not particularly limited except that the elastomer composition, the powder, and the hard resin described above are used.
  • the plug composition of the seismic isolation structure of the present invention It can manufacture as follows using this manufacturing method.
  • the manufacturing method of the composition for a plug of the seismic isolation structure of the present invention includes an elastomer composition preparation step for preparing an elastomer composition, a powder and a hard resin are added to the elastomer composition and kneaded, And a kneading step for obtaining a composition for a plug, wherein the kneading temperature after adding the hard resin is set to a temperature not higher than the softening point of the hard resin.
  • the operation flow at the time of manufacturing the plug for seismic isolation structures using an example of the manufacturing method of the composition for plugs of this invention is shown in FIG.
  • the above-described plug composition is produced as follows.
  • ⁇ Elastomer composition preparation process> First, in the elastomer composition preparation step, as shown in FIG. 2, the elastomer composition described above is added to the above-described elastomer component and kneaded with various compounding agents appropriately selected as necessary to prepare an elastomer composition.
  • kneading mixing of an elastomer component and a compounding agent can be performed using normal kneading apparatuses, such as a kneader and a Banbury mixer.
  • the raw material (elastomer component and compounding agent) of an elastomer composition, hard resin, and powder are knead
  • the elastomer composition is prepared in advance in the elastomer composition preparation step, and then the prepared elastomer composition, powder, and hard resin are kneaded to produce the plug composition.
  • a composition is prepared.
  • the elastomer component, compounding agent, powder and hard resin are not uniformly dispersed when the raw material of the elastomer composition and the hard resin and powder are simultaneously put into a kneading apparatus and kneaded.
  • a plug composition cannot be obtained. That is, the elastomer component, the compounding agent, the powder and the hard resin are not uniformly dispersed in the plug composition, and a plug having a desired damping performance cannot be obtained.
  • the kneading temperature after adding the hard resin needs to be a temperature below the softening point of the hard resin. Therefore, when the raw material of the elastomer composition and the hard resin are kneaded at the same time, the kneading temperature cannot be sufficiently increased and the compounding agent cannot be uniformly dispersed in the elastomer component.
  • the kneading temperature in the elastomer composition preparation step is preferably above the softening point of the hard resin described above, and is preferably less than the temperature at which the elastomer component and the compounding agent are significantly deteriorated by heat. If the kneading temperature is higher than the softening point of the hard resin, the elastomer composition is kneaded at a high temperature before the elastomer composition and the hard resin are kneaded, and the compounding agent is uniformly dispersed in the elastomer component. This is because things can be obtained.
  • kneading temperature is lower than the temperature at which the elastomer component and the compounding agent are remarkably deteriorated, a plug composition having desired performance can be prepared.
  • mixing and kneading soft resin with respect to an elastomer component it is preferable that kneading
  • the “softening point of the soft resin” refers to the softening point of the soft resin having the highest softening point when a plurality of soft resins having different softening points are blended.
  • the kneading temperature is determined by using a thermometer installed in the kneader or by directly measuring the temperature inside the material to be kneaded (elastomer composition) immediately after being discharged from the kneading apparatus. Can be measured. Further, the kneading temperature can be controlled using a known method such as a change in operating conditions (for example, the number of revolutions) of the kneader.
  • a powder for example, iron powder
  • a hard resin are added to the elastomer composition prepared in the elastomer composition preparing step and kneaded to obtain a powdery A plug composition is prepared.
  • kneading mixing of an elastomer composition, powder, and hard resin can be performed using normal kneading apparatuses, such as a kneader and a Banbury mixer.
  • the hard resin can be blended after pulverizing the hard resin pellets to a particle size of, for example, 100 to 300 ⁇ m by a known method.
  • components other than the elastomer composition, powder and hard resin may be added and kneaded as necessary.
  • the kneading step it is necessary to set the kneading temperature after adding the hard resin to a temperature equal to or lower than the softening point of the hard resin.
  • mixing temperature after adding hard resin is less than the softening point of hard resin, and it is still more preferable that it is 20 degreeC or more lower than the softening point of hard resin. If the kneading temperature after adding the hard resin is higher than the softening point of the hard resin, the resulting plug composition is due to the poor compatibility between the hard resin and the elastomer composition. This is because it becomes a block shape.
  • the elastomer composition, the powder, and the hard resin may be simultaneously put into a kneading apparatus and kneaded.
  • the powder is intermittently charged in a plurality of times, or is continuously charged over a certain time. It is more preferable to divide into batches intermittently.
  • the amount of each time can be set to an arbitrary amount, but as shown in FIG. Is preferably added evenly (by 1 / n). This is because if the powder is introduced at an equal ratio, the kneading temperature and the like can be easily controlled, and the powder is easily dispersed uniformly.
  • the hard resin when the powder is intermittently charged in a plurality of times, the hard resin may be charged into the mixture of the elastomer composition and the powder after the powder is charged once and kneaded. preferable. After adding the powder, the kneading temperature tends to rise. However, if the hard resin is added after the powder is added to the elastomer composition once or more times, the increase in the kneading temperature after the addition of the hard resin is suppressed. Because it can. Note that the hard resin is preferably charged before the n-1th charging of the powder, and more preferably simultaneously with the second charging of the powder.
  • the resin is preferably added between 0.2T and 0.5T from the start of the kneading step.
  • the measurement and control of the kneading temperature in the kneading step can be performed in the same manner as in the elastomer composition preparation step. Further, as kneading conditions in the kneading step, it is preferable that the rotation speed is in a range of 20 to 40 rpm and the temperature is about 100 ° C. In order to suppress a decrease in the viscosity of the elastomer component, it is preferable that the rotational speed is low. Furthermore, in the kneading step, before discharging the kneaded composition, it is preferable to release the pressure and knead without pressure. By kneading without pressure, the composition does not harden and the composition can be easily taken out from the kneading apparatus.
  • the plug for a seismic isolation structure according to the present invention is manufactured using the plug composition described above. And this plug for seismic isolation structures is excellent not only in the low distortion region but also in the high strain region.
  • the seismic isolation structure plug of the present invention is not particularly limited, and can be manufactured using the method for manufacturing the seismic isolation structure plug of the present invention.
  • the manufacturing method of the plug for a seismic isolation structure of the present invention is characterized in that it includes a pressure molding step of pressure molding the plug composition manufactured according to the above-described manufacturing method in a mold.
  • the powdered plug composition taken out from the kneading apparatus is transferred to a molding apparatus (cylindrical mold), and the plug composition in the mold is pressed with a pusher from both sides or one side (pressing)
  • the plug is formed by processing.
  • a press machine used when pressurizing the composition for plugs what is normally used in the said technical field is employable.
  • the molding pressure is not particularly limited and can be 0.7 t / cm 2 or more.
  • the temperature at the time of molding the plug in the pressure molding step is not particularly limited and is preferably in the range from room temperature to the softening point of the hard resin. It is particularly preferable to make it less than.
  • the molding temperature can be, for example, in the range of room temperature to 150 ° C. This is because if the molding temperature is increased, voids (remaining air) in the molded plug can be reduced, and the damping performance of the plug can be further enhanced.
  • the molding temperature is higher than the softening point of the hard resin, the hard resin is softened during pressure molding, and a plug having a desired damping performance may not be molded.
  • the molding temperature is measured by, for example, placing a thermometer inside the cylindrical mold or pusher, or on the inner peripheral surface of the cylindrical mold or the tip of the pusher (that is, the portion that contacts the surface of the molded plug). It can be measured by installing.
  • the molding temperature can be controlled using a known method such as heating of a cylindrical mold.
  • the plug composition of the seismic isolation structure of this invention is limited to the said example.
  • the composition for plug of the seismic isolation structure, the plug for the seismic isolation structure, and the seismic isolation structure of the present invention can be modified as appropriate.
  • the method for producing the plug composition for the seismic isolation structure of the present invention and the method for producing the plug for the seismic isolation structure are not limited to the above example, and the plug composition for the seismic isolation structure of the present invention
  • the manufacturing method and the manufacturing method of the plug for a seismic isolation structure can be modified as appropriate.
  • Example 1 an elastomer composition having a formulation shown in Table 1 was prepared using a kneader.
  • PP polypropylene
  • PE polyethylene
  • PPO polyphenylene oxide
  • the obtained plug composition was pressure-molded at a temperature of 100 ° C. and a pressure of 1.3 ton / cm 2 to produce a cylindrical seismic isolation structure plug having a diameter of 45 mm.
  • damping performance was evaluated with the following method about the obtained cylindrical plug for base isolation structures. The results are shown in Table 1.
  • FIG. 3 shows the relationship between the horizontal displacement ( ⁇ ) and the horizontal load (Q) of the seismic isolation structure.
  • ⁇ horizontal displacement
  • Q horizontal load
  • damping performance was evaluated by the method similar to the above on the conditions of temperature 20 degreeC. Further, the D hardness of the elastomer composition and the hard resin was measured according to JIS K6253. The results are shown in Tables 3 to 4 and FIG.
  • Polyphenylene oxide PPO
  • PES Polyethersulfone
  • the plugs for the seismic isolation structures of Examples 6 to 13 are the conventional example 2 and It can be seen that the damping performance in the low distortion region is improved as compared with the plug for the base isolation structure of Comparative Example 1. Further, it can be seen that the seismic isolation structure plugs of Examples 8 to 13 have improved damping performance in all strain regions as compared to the seismic isolation structure plugs of Examples 6 to 7.
  • the hard resin was pulverized to a particle size of 100 to 300 ⁇ m and charged into the kneader simultaneously with the second charging of the iron powder.
  • the obtained plug composition was subjected to pressure molding at a temperature of 100 ° C. and a pressure of 1.3 ton / cm 2 to produce a cylindrical seismic isolation structure plug having a diameter of 45 mm (pressure molding step). ).
  • a columnar seismic isolation structure plug could not be formed.
  • damping performance was evaluated by the method similar to the above on the conditions of temperature 20 degreeC.
  • the shape and moldability of the composition for plugs were evaluated by the following methods.
  • D hardness of the elastomer composition and the hard resin was measured according to JIS K6253. The results are shown in Table 7.
  • Example 2 The elastomer composition, the plug composition, and the columnar seismic isolation were carried out in the same manner as in Example 17 except that the elastomer composition and the iron powder were kneaded with the volume ratio and conditions shown in Table 7 without using a hard resin. A structure plug was produced. And it carried out similarly to Example 17, and evaluated the damping performance of the plug for base isolation structures, and the shape and moldability of the composition for plugs. The results are shown in Table 7.
  • ⁇ Shape of plug composition The shape of the obtained plug composition was evaluated by visual observation. And when it was a lump with a diameter of 30 mm or more, it was evaluated as “block shape”, and when a lump with a diameter of 30 mm or more was not seen, it was evaluated as “powder”.
  • ⁇ Moldability of plug composition When attempting to mold a cylindrical plug for a base-isolated structure having a diameter of 160 mm and a height of 120 mm, if the porosity of the molded plug was 3.5% or less, “Good (good)” When the porosity was more than 3.5% or when it could not be formed into a cylindrical shape, it was judged as “x (defect)”.
  • LDPE Low density polyethylene
  • HDPE High-density polyethylene
  • PPO Polyphenylene oxide
  • SX-101 manufactured by Asahi Kasei Chemicals Corporation
  • PES Polyethersulfone
  • the composition for plugs of the seismic isolation structure which can provide the plug for seismic isolation structures which improved the damping performance in the low distortion area

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Abstract

L'invention concerne les structures sismiques. Le but de la présente invention consiste à créer une composition pour un plot pour une structure sismique permettant de créer un plot pour une structure sismique qui améliore la performance d'amortissement dans une région à faible déformation. Un autre objectif de la présente invention consiste à créer un procédé pour fabriquer une composition pour un plot qui possède une aptitude au moulage supérieure. Cette composition pour un plot pour une structure sismique est caractérisée en ce qu'elle contient une composition élastomère qui comprend au moins un constituant élastomère, une poudre et une résine de haute dureté ayant une dureté D au moins 30 fois supérieure à celle de la composition élastomère. En outre, ce procédé pour fabriquer cette composition pour un plot pour une structure sismique est caractérisé par une étape de fabrication de composition élastomère pour fabriquer la composition élastomère qui comprend au moins un constituant élastomère ; et une étape de pétrissage servant à obtenir la composition pour un plot consistant à ajouter et à incorporer par pétrissage, dans la composition élastomère, une poudre et une résine de haute dureté qui possède une dureté D au moins 30 fois supérieure à celle de la composition élastomère, et à maintenir pendant l'étape de pétrissage une température de pétrissage égale ou inférieure au point de ramollissement de la résine dure.
PCT/JP2012/004663 2011-07-28 2012-07-23 Composition pour plot de structure sismique, plot pour structure sismique et structure sismique, ainsi que procédé de fabrication d'une composition pour plot de structure sismique et procédé de fabrication d'un plot pour corps de structure sismique WO2013014907A1 (fr)

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JP2011-165880 2011-07-28
JP2011270563A JP5869860B2 (ja) 2011-12-09 2011-12-09 免震構造体のプラグ用組成物の製造方法および免震構造体用プラグの製造方法
JP2011-270563 2011-12-09
JP2011273756A JP5869863B2 (ja) 2011-12-14 2011-12-14 免震構造体のプラグ用組成物、免震構造体用プラグおよび免震構造体
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CN108481592A (zh) * 2018-03-27 2018-09-04 巢湖市荣达塑业有限公司 一种可减震的洗衣机塑料混合设备
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