TW201241086A - High decay composition - Google Patents

Abstract

This invention provides a novel high decay composition which can be used for fabricating a high decay part having high decay function and low rigidity while being newly made; due to the low rigidity, the part does not need to be given a deformation process before being shipped. A deproteinized natural rubber of a total nitrogen contain ratio of 0.3 mass% or less is used as a base polymer, and a silica is combined with a ratio of 100 mass% or more and 170 mass% or less based on the deproteinized natural rubber of 100 mass%.

Description

201241086 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a high-attenuation composition which is a basis for a high-attenuation member, and the above-described attenuating member transmits or absorbs vibration energy. [Prior Art] For example, in buildings such as buildings or bridges, industrial machinery, airplanes, automobiles, iron, vehicles, computers or peripheral equipment, household electrical equipment, and even steamers, the field of wide-ranging materials Attenuate the ride. By using the above-described high attenuation member', it is possible to mitigate or absorb the vibration, vibration, vibration, and the like of the miscellaneous energy. One of the above high attenuation members is formed by including a natural rubber as a base polymer = a sacrificial composition. In the above high-attenuation composition, in order to improve the agricultural reduction performance, that is, the material loss when the money is applied is increased, the efficiency is good, and the vibration energy is attenuated, and the carbon-free, non-ruthenium filler is usually formulated or rosin. Adhesive property such as petroleum resin is used (for example, refer to Patent Document 1 to Patent Document 3). However, the use of these conventional high attenuation reduction members can be utilized. In order to compare the current situation, the adhesion of the adhesive word is increased, or the inorganic filler is added, but a large amount of inorganic filler is added or the adhesiveness is increased and the workability of the strong product is decreased. Processing as a captain's _.仏 或者 or 4 201241086l Special ^ to the factory level to mass production of high attenuation structure of the above-mentioned processability reduction to high fading _ pieces = the energy required for production 'and thus the production cost reduction ^ ^ ^ to the following In the case of the attenuating agent, the attenuating agent is added to the high-yield agent, and the processability is not lowered (for example, Patent Document 4 to Patent Document 7, etc.) ). ^, mass ratio 5/95~90/1. The ratio of the base polymer to the base of the J rubber composition. - 4 of the above-mentioned rubber [PRIOR ART DOCUMENT] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 2 No. 3-2〇14 [Patent Document 2] Patent Publication No. 2〇〇7 63425 [Patent Document 3] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. [Patent Document 6] Japanese Patent No. 366118 No. [Patent Document 7] Japanese Patent No. 3675216 (Patent Document 8) Japanese Patent Laid-Open Publication No. Hei No. Hei. The high-attenuation composition described in Patent Document 7 has a domain with various problems as described above, but can have a certain degree of high attenuation performance and good moldability by == ratio of each component. coexist. In addition, when the base polymer described in Patent Document 8 is applied to a high-attenuation composition, it is considered that the same high-attenuation performance and good workability coexist. However, the rigidity formed by using the above-mentioned conventional high-attenuation composition is too high to be directly used as a high-attenuation member. For example, the earthquake-proof and seismogenic earthquake-resistant 3 of the building cannot be used as a high-attenuation force at the moment of the earthquake to reliably prevent the energy of the earthquake from being transmitted to the "meaning of the two". Therefore, the above-mentioned rigidity The problem is that the high-attenuation structure of the newly-made shock absorber for vibration is re-sold, and the product is shipped. However, there is a problem that the productivity of the member is reduced due to the necessity of performing the boring operation. = industry's impact on the productivity of high-attenuation components (IV), the purpose is to provide a new high-attenuation composition, 6

201241086 L can be manufactured not only with high attenuation performance, but also because of new: (10) work on the application of deformation history before shipment = the present invention is a high-attenuation composition, in the base polymerization,,, machine filler, the high The attenuation composition is characterized by . _ The object is a deproteinized day with a total gas content of 〇.3 mass% or less = a study containing a dioxide dream and a ratio of (10) quality rise with respect to the upper white white, and a new production rigidity of the high attenuation member In the above-mentioned high-attenuation member, the above-mentioned high-attenuation member is subjected to an inorganic filling such as a series of fossils, and the kneading of the man-hours such as the work of the wire is reduced. In addition, in the present invention, as described above, the protein is sufficiently removed as described above, and the total ll content rate as an index of the content ratio thereof becomes 0.3% by mass or less of the deproteinized natural rubber is used as the base polymer to suppress the gel =, 0 = This allows the inorganic filler such as ceria to be more uniformly dispersed in the above deproteinized natural rubber by the above-mentioned kneading. Therefore, the rigidity at the time of new production of the high-attenuation member can be greatly reduced as compared with the prior art. Therefore, according to the present invention, it is possible to manufacture a high attenuation member which does not require a deformation history to be applied before shipment. In addition to the 201241086-TU-T / 4C.plf force, the filling agent of the present invention can be used as described above in the above-mentioned manner as much as possible. The ratio of the force energy distribution is set to 100 parts by mass. ::t describe the high attenuating substance to be the same as the previous one: and will:: 埴: 100 parts by mass of the deproteinized natural rubber === The ratio of the formula is limited to the case where the portion will be high: go to: even if In the above, it is impossible to make all the sulphur dioxides in the sputum of the sputum, and the smear of the smear of the smear is as follows. It is necessary to take into account the rigidity of the ship, and the rigidity of the non-negative component is further released to prevent the energy transmission of the earthquake. According to the present invention, it is possible to provide a novel high-attenuation composition which can be manufactured not only with high attenuation performance but also with high rigidity due to rigidity during new production without requiring a process of applying deformation before shipment. Mode] The present invention is a high attenuation composition, The high-attenuation composition is formulated in the base polymer, wherein the base polymer has a total nitrogen content of 0.3% by mass or less of the deproteinized natural rubber, and the inorganic filler contains at least sulfur dioxide, and is relatively In the above-mentioned deproteinized portion by mass, the above-mentioned composition ratio of the above-mentioned oxidized stone is more than 170 parts by mass or less. (Base polymer: deproteinized natural rubber) " The total nitrogen content of the egg to be used as the base polymer in the present invention is limited to 〇3 ..., ,

That is, the total gas content rate exceeds 0.3 mass. / ^ Under the day of miscellaneous duties, although with ordinary undeproteinized natural rubber J = = = = = = high attenuation of the component into the new work ^ with this = === upper, the rate becomes Μ mass% or less The deproteinized natural rubber is used as the dinitrogen:: 201241086 substance, and as described above, a compounding and inorganic hydration can be uniformly dispersed in the base polymerization by the new preparation & agent of the attenuating member during the above preparation or forming process. In the case, the rigidity at the time of high and also 乍 can be greatly reduced as compared with the prior art. If Kao Yong Xia Achan attenuates the attenuation properties of the component. In order to further improve the above effect, the amount of the deproteinized natural rubber white matter: the amount of the two in the above range is as small as possible, and the nitrogen content as the egg is in the above-mentioned °. 3 mass%, particularly preferably 0.05 mass = In other words, it is preferably 0.1% by mass or less, and 纨N::: is preferably protein-free. However, the lower limit of the gas-to-gas ratio is usually G.G3 mass%. Oj quality rubber is deproteinized, and the total nitrogen content is obtained by Lit Kaiping. 6-329 = Described * White natural rubber. For example, Japanese special gossip stem 7 tiger bulletin, Japanese Patent Special Open 2005-47993 can be used. Reported in the special _ previously known processing methods. The measured total value of nitrogen is determined by the value of Kj a- Μ 减 定 0 减 减 减 减 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 In the present month, only the total nitrogen content 〇3 mass% deproteinized natural rubber ' as described above is used as the base constituting the high attenuating composition. As described in Patent Document 8, the case where the above-mentioned deproteinized natural rubber is used in combination with ordinary natural rubber which has not been subjected to deproteinization is not included in the scope of the invention. In the above-mentioned combined system, even if the total amount of total nitrogen 3 is 0.3% by mass, the product is gelled due to the 201241086 protein contained in the natural rubber, so that the inorganic filler such as cerium oxide cannot be uniformly formed. dispersion. Further, the case where the deproteinized natural rubber is used in combination with the synthetic rubber having compatibility with the above-mentioned deproteinized natural rubber is also not included in the scope of the present invention. In the above combined system, the type of the synthetic rubber to be used is also dependent on, but the temperature dependency of the attenuation performance is large, and it is not possible to provide a high-attenuation member which exhibits stable attenuation performance over a wide temperature range. However, in the present invention, two or more kinds of deproteinized natural rubber having a total nitrogen content of not more than 3% by mass can be used. By using two or more types of deproteinized natural rubber in combination, for example, the total nitrogen content of the total amount can be finely adjusted within the range of 〇 and 3% by mass or less. ° (Inorganic filler) As the inorganic filler, at least cerium oxide which is particularly excellent in the effect of improving the damping property of the high-attenuation member is used. The above-mentioned cerium oxide can be classified into any of the fossil-based and dry-type oxidized trees according to the production method thereof. In addition, the effect of improving the attenuation performance of the attenuating member is improved by the use of the amount of money as the filling of the oxygen, and it is preferable to use the Brøer_Emmett_Teller 'BET specific surface area to be more than the above. The dioxotomy is preferably a fossil with a BET specific surface area of 400 m 2 /g or less, particularly preferably 27 () m 2 /g or less. 201241086 As a gas adsorption method for adsorbing gas, it is determined relative to deproteinized natural rubber. The ratio must be 100 parts by mass or more, 17 ^ 曰 ^ 氧化 夕 的 的 的 的 。 。 。 。 。 。 。 。 。 。 。 。. When the above range is brought about, the above-described reduction in the performance of the oxidation reduction is achieved. On the other hand, in the case of blending 4 minus members, if the ratio exceeds the above range, the base polymer cannot make all the dioxide materials sag = 2, and the rigidity of the high-attenuation member at the time of production is required. The job of applying a deformation history after shipment. Parent=External Production' If the attenuation of the high-attenuation member is further increased, the ratio of the emulsified stone is preferably in the above range; Γρι considers the high-attenuation member in the new production. ^ nmr (10) material ship tb Caishang ship _ preferably for the description of the second oxidation (four), for example, T_h Siliea (shares) N1PSU (words of the main trademark) KQ, VN3, AQ, ER, etc., i or more. The inorganic filler may be used alone or in combination with other inorganic fillers. One of the above other inorganic fillers may, for example, be a carbonated carbon or carbon black. Among them, as the calcium carbonate, human carbon which is classified according to the production method and the like, and calcium carbonate which can function as a filler in calcium or heavy calcium carbonate can be used. Further, calcium carbonate may be subjected to surface treatment to improve the affinity and dispersibility of the 201241086 base polymer or couinarone-indene resin or the like. Examples of the above calcium carbonate include: Bai Yanhua (registered trademark) CC manufactured by Shiraishi Calcium (commercially-traded) CC [synthetic calcium carbonate, primary particle diameter: 50 nm, surface treatment agent: fatty acid], Bai Yanhua DD [synthetic calcium carbonate, primary particle diameter: 50 nm 'surface treatment agent · rosin acid Bu Calm〇s (registered trademark) [synthetic calcium carbonate, primary particle size 50 mn, surface treatment agent: rosin acid + lignin acid], BF_300 [heavy calcium carbonate, average grain Diameter: 8.00 μιη, specific surface area: 2700 cm/g 'apparent specific gravity: 1.26 g/ml 'dioctyl phthalate 'DOP) oil absorption: 26 ml/100 g], BF-200 [ Heavy calcium carbonate 'average particle size: 5 · 〇〇μιη, specific surface area: 4〇〇〇cm2 / g, apparent specific gravity: 1.17 g / m Bu DOP oil absorption: 26 ml / 100 g], Whiton (registered trademark ) B [heavy calcium carbonate, average particle size: 3 6 〇μιη, specific surface area: 6000 Cm2/g 'apparent specific gravity: 1.03 g/m b DOP oil absorption: 26 ml/100 g], etc. 1 or 2 More than one species. Further, various carbon blacks which can be used as a filler in various carbon blacks classified as carbon black by the production method or the like can be used. Examples of the carbon black described above include High Abrasion Furnace (HAF), Fast Extruding Furnace (FEF), and General Purpose (

I, or two or more types, such as the purpose of the Furnace, GPF. Other fillers used in combination with cerium oxide are preferably the carbon blacks described above. The ratio of the stomach preparation of the carbon black is not particularly limited, and is preferably 0.5 parts by mass or more, and preferably 5 parts by mass or less, based on 1 part by mass of the deproteinized natural rubber. 13 201241086 (Others) Equipped with: „High-attenuation composition towel' can be further adjusted to the appropriate proportion of the rubber-deficient accelerator, vulcanization-promoting auxiliaries, etc. , softeners, adhesives, anti-aging solutions. Among them, the Shixi burning compound is represented by the formula (a).

1 R2 R1-Si~R3 (8) [wherein at least one of R, R2, R3 & R4 represents a methoxy group; however, R1, R2, R3 and R4 are not simultaneously alkoxy groups. Other examples of the alkyl group or the aryl group include various cyclane compounds which can function as a dispersant for cerium oxide, such as a decane coupling agent or a decylating agent. Particularly preferred are alkoxydecanes such as hexyltrimethoxydecane, phenyltrimethoxydecane, phenyltriethoxydecane, and diphenyldimethoxydecane. The above-mentioned decane compound may, for example, be KBE-103 (phenyltriethoxydecane) such as Shin-Etsu Chemical Co., Ltd. The compounding ratio of the Shi Xixuan compound is not particularly limited, and is preferably 5 parts by mass or more, and preferably 25, f = 201241086 - ι, for a human remedy for 100 parts by mass. One type of the ketone ketone resin, the liquid rubber, and the like may be exemplified by a combination of a coumarone and a (four) "a relatively low degree of the surface of the kiln knife." For example, the above-mentioned coumarone gp resin may be a softening point of Nittoresin (registered trademark) coumarone G-9 which is coated, and a C' acid value: 1.0 KOHmg/g or less. Value 77〇' KOHmg/g, desert value 9 g/1〇〇g], G-1 surface [Average molecular weight value·25 Softening point: 100°c' Acid value: 1.0 K0Hmg/g or less, 30 'KOHmg/g , desert value ng / 1 〇〇 g], v_12 〇 [average molecular weight ^ · 25 softening point · 120 〇 C, acid value: io K0Hmg / g or less, hydroxyl value 60, KOHmg / g, bromine value 6 g / l 〇〇g], V-120S [Average molecular weight: 3 〇 softening point: 120 ° C, acid value: 1. 〇 KOH mg / g or less, hydroxyl value 5 〇, KOH mg / g, bromine value 7 g / 100 g] Species or more than 2 '.3〇 The blending ratio of the ketone oxime resin is not particularly limited, and is preferably 5 parts by mass or more and 5 parts by mass or less based on 100 parts by mass of the white natural rubber. 乂佳 is another 'liquid rubber exemplified at room temperature ( (3: (35 ° C)) The various rubbers are liquid. The liquid rubber may, for example, be a liquid polyisoprene rubber or a liquid nitrile rubber (liquid acrylonitrile-acrylic rubber). -butadiene rubber 'NBR)), one or more of liquid styrene butadiene rubber (SBR), etc. 15 201241086 Among them, liquid polyisoprene rubber is preferred. The liquid polyisoprene rubber may, for example, be Kuraprene (registered trademark) LIR-50 manufactured by Kuraray, etc. The mixing ratio of the liquid polyisoprene rubber is not particularly limited, and is relative to the deproteinized natural one. 100 parts by mass of the rubber, preferably 5 parts by mass or more, and preferably 80 parts by mass or less. The adhesiveness-imparting agent is, for example, a petroleum resin, etc. Further, the petroleum resin is preferably produced, for example, from Maruzen Petrochemical Co., Ltd. MarukaRez (note Trademark) M890A [Dicyclopentadiene-based petroleum resin, softening point: 1〇5. (:;|, etc. The ratio of the above-mentioned petroleum resin is not particularly limited, and is preferably 1 GG part by mass relative to the deproteinized natural rubber. 3 parts by mass or more, and preferably 50 parts by mass or less. Examples of the anti-aging agent include benzoquinone. Sit (benzimidaz〇ie), ^Kun (qUln〇ne), bisphenol (bisphenol), polyphenol (p〇iyphen〇i) ^, hydrazine quin〇ne, amine ( One or two or more kinds of various chemicals are used. It is particularly preferred to use a benzoate anti-aging agent in combination with a lanthanide anti-aging agent. In the case of the benzimidazole-based anti-aging agent, for example, Naka Crac (registered trademark) μβ [2-mercaptobenzimidazole] manufactured by Industrial Co., Ltd., and the like are exemplified. In addition, the 制造 Μ 服 抗 抗 Μ Μ Μ Μ Μ Μ Μ Μ 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香 芳香It is more than the mass part of the anti-aging, and is 5 parts by mass or less. Further, the phase H0 egg 5 white natural rubber 100 is preferably read, and the anti-aging agent is preferably 〇5 or more, and preferably 5 parts by mass or less. The vulcanizing agent may, for example, be sulfur or a sulfur-containing organic compound. The vulcanization-promoting agent may be a vulcanization accelerator such as a sulfe_ide catalyst or a thiuram. The vulcanization-promoting agent differs depending on the type, and the mechanism for promoting vulcanization is different, so that it is used in combination. In the case of the hypoxanthine-based vulcanization accelerator, for example, Nocceler (registered trademark) Ns manufactured by Ouchi New Chemical Industry Co., Ltd. [Team 2nd butyl-2-benzopyrazine sulfonate] (N_tert-bUtyl-2-benzothiazolylsulfenamide), etc. Further, the thiuram vulcanization accelerator may, for example, be Noeeder TBT [tetfabu_ufam disulfide] manufactured by Ouchi Shinko Chemical Industry Co., Ltd. Wait. Examples of the vulcanization accelerating aid include zinc oxide and stearic acid. It is generally preferred to use both as a vulcanization accelerating aid. The ratio of the vulcanizing agent, the vulcanization accelerator, and the vulcanization accelerating aid can be appropriately adjusted depending on the characteristics such as the use of the high-attenuating member, such as the attenuation property or the rubber hardness. The attenuating composition of the present invention is prepared by using any of the kneading machines, and the f-knife is prepared by the above-mentioned f-knife, and the above-mentioned 胄n纟 reduction is formed into a three-dimensional shape, and the protein is deproteinized. Natural rubber is vulcanized, 17 201241086 &quot;TV-Γ I ^γ, ιΐ to produce high attenuation members with specified attenuation properties. Examples of the high-attenuation member which can be produced by using the high-attenuation composition of the present invention include shock-absorbing and shock-proofing of a group of people to a building such as a building, which is incorporated into the structure of the building ( Vibration damping) Vibration components such as shock absorbers, suspension bridges or cable-stayed bridges, anti-vibration components for industrial machinery or airplanes, automobiles, railway vehicles, etc., computers or their peripheral equipment, or household electrical appliances §5: Anti-vibration members such as spare parts, and treads for automobile tires. According to the present invention, a deproteinized natural rubber having a total nitrogen content of 3% by mass or less is used as a base polymer, and the blending is contained in an amount of at least 1 part by mass or more based on 100 parts by mass of the above-mentioned deproteinized natural rubber. The following inorganic filler of cerium oxide provides a novel tfj attenuating composition which can be manufactured not only with high attenuation performance, but also because of low rigidity during new production, and does not need to be shipped before shipment. A high attenuation member that performs the work of applying a deformation history. In particular, in the case of using the high-attenuation composition of the present invention to form a shock absorbing device incorporated in a structure of a building, it is possible to perform the work of applying a deformation history before shipment, and to comply with the occurrence of the earthquake. Earth's energy is prevented from being transmitted to buildings. [Examples] Unless otherwise specified, the following examples and comparative examples of high-attenuation compositions were prepared and tested under the conditions of temperature 2 (TC, relative concentration of 55%). <Example 1> (Deproteinization) Preparation of natural rubber) 18 201241086 High-ammonia type natural rubber latex [Soctec (Malaysia) Manufactured] Rubber solid content concentration: 6G 2 f% %] 15Gml towel added 2 liters of water to the solid content of the rubber 〇 mass% of the way into &amp; dilution, add 〇.12% sodium naphthenate to stabilize it, add sodium dihydrogen phosphate 'to adjust the pH to 9.2. Wine rfrj added to make the deproteinase as alkaline Protease [Nov〇Zymes japan (registered trademark) 2 7_8g is dispersed in 100ml of steamed water, 9·2' and then removed for 4 hours to remove the protein for 1 f4% ratio As an anionic surfactant, S. cerevisiae sulphate [[4] manufactured by Kao (stock),: the cream is separated by centrifugation in minutes and separated into upper layers. Then diluted with distilled water to obtain a rubber solid. 6G% deproteinized natural rubber latex. The enamel white rubber latex scale is placed on a glass plate and dried at room temperature 2 under reduced pressure to obtain a dry rubber. (mass ratio 3: 〇 Remove the impurities (homopolymer, etc.) from the above-mentioned dry rubber, and prepare the gluten-free knee nitrogen content as the coffee mass%, (high-attenuation composition i) The molecular weight is 1.4 million. 100 parts by mass of dry white natural rubber is blended with each of the following knives in Table 1 'mixed with a closed kneader to prepare a high i reduction group 19 201241086. Table 1 Protein natural rubber 100 cerium oxide 135 stupyl triethoxy decane 13.5 liquid polyisoprene rubber 30 carbon black 10 dicyclopentadiene petroleum resin 30 coumarone oxime resin 15 stupid imidazole anti-aging agent 3 lanthanide anti-aging agent 3 5% oil-treated powder sulphur 2 sulfonamide-based vulcanization accelerator 1 thiuram vulcanization accelerator 1 zinc oxide 2 kinds 2 stearic acid 2 The components in Table 1 are as follows.

Semen dioxide: filler, Nipsil (registered trademark) KQ phenyl triethoxy decane manufactured by Tosoh Silica Co., Ltd.: decane compound, KBE-103 liquid polyisoprene produced by Shin-Etsu Chemical Co., Ltd. Rubber: Softener, (share) LIR50 manufactured by Kuraray

Carbon black: filler, Diablack (registered trademark) G manufactured by Mitsubishi Chemical Corporation

Dicyclopentadiene petroleum resin: Adhesive imparting agent, softening point l〇5°C, Maruka Rez (registered trademark) M890A manufactured by Maruzen Petrochemical Co., Ltd. M890A Coumarone resin: Softener, softening point 90° C, 曰涂化学(股) 20 201241086 Manufactured by Escron (registered trademark) g_9〇

Benzimidazole-based anti-aging agent: 2-mercaptobenzimidazole, Ouchi Newcomer NocracMB manufactured by Moye Co., Ltd.

Anti-aging agent: AntigenFR 5% oil-treated powder sulfur: vulcanizing agent manufactured by Maruishi Chemical Co., Ltd., manufactured by Tsurumi Chemical Industry Co., Ltd., sulphate vulcanization accelerator: N-tert-butyl _ 2-benzopyrene-β-sodium sulfoximine, N〇cceler (registered trade ladder) manufactured by Ou Nei Emerging Chemical Industry Co., Ltd. NS thiuram vulcanization accelerator: tetrabutyl thiuram disulfide, large Neixin

Two kinds of Nocceler TBT-N zinc oxide manufactured by the chemical industry (shares): vulcanization accelerator, Sanjing Metal Mining Co., Ltd. Stearic acid: vulcanization accelerator, "Camellia" manufactured by Nippon Oil Co., Ltd. 2> In addition to the amount of the test protease as depeptin was set to 2 〇g, the egg-removing rubber was prepared by performing egg-removal treatment in the same manner as in Example 1. The thief content rate of the above-mentioned egg-removing rubber is 〇25. /. The gel content was 18.8% by mass, and the weight average molecular weight was 1,300,000. Then, a high-attenuation composition was prepared in the same manner as in Example 1 except that the same amount of the above-described deproteinized natural rubber was used. <Comparative Example 1 &gt; In addition to the deproteinized natural rubber, the same amount of unnaturalized natural rubber was used [standard Malaysian rubber (standard 20124108 color)

A high attenuation composition was prepared in the same manner as in Example j except for Malaysian Rubber (SMR)-CV60. <Comparative Example 2 &gt; De-proteinized natural rubber was prepared in the same manner as in Example 1 except that the amount of the alkaline protease as deproteinase was set. The deproteinized natural rubber had a total nitrogen content of 〇35 mass%, a gel content of 25.3% by mass, and a weight average molecular weight of 130,000. Then, a high-attenuation group was prepared in the same manner as in Example 1 except that the same amount of the above-described deproteinized natural rubber was used. <Agricultural reduction characteristic test> (Preparation of test body) The high-attenuation composition prepared in the examples and the comparative examples was extruded into a sheet shape and then punched, and a circular plate 制作 (thickness 5 mm x diameter 25) was produced as shown in FIG. Mm), on the front and back sides of the disc 1 respectively, a rectangular flat steel plate 2 having a thickness of 6 mm x a length of 44 mm x a width of 44 mm is overlapped by a vulcanization adhesive, and the side is heated in the lamination direction to be heated to 15 () Then, the high-attenuation composition forming the circular plate i was vulcanized, and the disk-shaped steel plate 2 was vulcanized and bonded to obtain a test body 3 for evaluation of the attenuation characteristics as a model of the south attenuation member. (Displacement test) Two test bodies 3 were prepared as shown in Fig. 2 (a), and the two test bodies 3 were fixed to the i-piece central fixing jig 4 by screwing them through the steel plate 2, and in each test. On the other steel plate 2 of the body 3, the left and right fixing jigs 5 are each fixed by a bolt fixing 22 201241086. Then, the fastener 4 is fixed via the joint 7 and is fixed on the upper arm 6 of the machine, and the left and right movable plates 8 of the above test machine are fixed to the left and right sides via the joint 9'. on. Then, in this state, the movable disk 8 is displaced in the direction of the solid and the arm 6 as indicated by the white arrow in the figure, so that the disk in the test body 3 becomes as shown in Fig. 2(b). A state in which strain is deformed in a direction orthogonal to the lamination direction of the test body 3, and then from the filament state, the movable white arrow is shifted downward in a direction opposite to the direction of the fixed arm 6, and is restored to the above-described FIG. In the state shown in (a), the hysteresis loop H (see Fig. 3) is obtained, and the disc 1 in the test body 3 is repeatedly subjected to strain 5 square = round disc 1 in the test body The relationship between the displacement amount (mm) of the positive parent's square direction and the load weight (N). Measurement = The above operation was performed in three cycles to obtain the third value. The displacement amount in the direction perpendicular to the direction of the two steel sheets 2 sandwiching the disc 1 is the thickness of the disc 1 and is obtained by the above measurement. The hysteresis loop shown in 3 = the maximum displacement point is connected to the minimum displacement point, and the slope Keq (N/mm) of the straight line indicated by the thick solid in the figure is obtained, according to the above-mentioned slope Keq jN/m2m), the circular plate 1 Thickness T (mm), and cross-sectional area of the circular plate 1 (mm2)' Using the formula (1): 23 (1) 201241086 Number 1

Keg χ τ A

Geq is used to find the equivalent shear elastic modulus Geq (N/_2). The relative shear elastic modulus (N/mm2) of each example and the comparative example when the equivalent shear elastic modulus Geq (N/mm2) in Comparative Example 1 was set to 1 求出 was obtained. value. 4, 'the amount of absorbed energy expressed by the total area of the hysteresis loop H indicated by the hatched line in FIG. 3, and the horizontal line L1 of the graph, which is indicated by the network line, and the horizontal axis of the graph, and From the straight line ^ and the hysteresis ^ (4) to the elastic strain energy w represented by the surface area of the _ region of the horizontal thinning k, using the formula (2). Number 2 Heq 4π

m IT (2) then ==: energy = minus one's just # The equivalent attenuation constant in Comparative Example 1 is set to the exact case of the case, and the equivalent attenuation constant of the comparative example is such that the relative value is 95 or more. The evaluation was that the good sub-value was bad. (4), and will be less than 95. (Evaluation of initial rigidity) According to the new production at the time of the above displacement test, the first load _ 24 201241086 The maximum load when used (3): 1 Number 3 Initial rigidity ratio &amp; body 3 to find the initial stiffness ratio. The lower the initial stiffness ratio, the lower the new production time (four) m. Then the test can be judged, therefore, the rigidity of each instance and time. The relative value of the initial rigidity ratio of the initial rigidity comparative example in Comparative Example 1 was determined, and the ratio was set to 100. The new production was evaluated. The above results are shown in Table 2. Table 2

According to the results of Example 1, Example 2, Comparative Example 1, and Comparative Example 2 of Table 2, it was judged that 'by using the total nitrogen content of 0.3% by mass or less; white natural rubber as a base polymer can be greatly reduced. High attenuation member, rigidity during production. Further, according to the results of Example 1 and Example 2, the total nitrogen content of the above-mentioned deproteinized natural rubber is within the above range 25 201241086, the amount of fusibility is 4 or less, and particularly, it is set to G.G5 mass% or less. V reduces the rigidity of the above new production. <Examples 3 to 5, Comparative Example 3, and Comparative Example 4> The amount of the deproteinized natural rubber as a base polymer was measured in an amount of 8 parts by mass (Comparative Example 3), 100 You' 150 parts by mass (Example 4), 170 parts by mass (Example 5), and (10) parts by mass (Comparative Example 4 = Method for preparing high-attenuation group secrets. 颂 (4) 2 Identicality 赖' evaluated its characteristics. The results were compared with those of Example 2. The results are shown in Table 3. In addition, the table towel, the powder, and the like were all as described above, and the relative value when Comparative Example 1 was set to 100 was prepared.

According to the examples 2 to 5 of the table 3 and the comparative example 3, it was judged that the ratio of the gasification enthalpy of the example 4 was set to 100 parts by mass or more and the mass parts by mass ratio with respect to the deproteinized natural rubber. 'When the second can maintain high attenuation performance, while reducing the rigidity below the high-loss mass. In addition, according to the new production of the 钤 member of the example 2 to the example 5, the judgment, the second gas 26 201241086

The blending ratio of _ L fossil eve is preferably 150 parts by mass or less in the above range. The inside is preferably 135 parts by mass or more, and [simplified description of the drawings] Fig. 1 is a test body in which a model of c T = reduced member is used for the attenuation performance of the high-attenuation member including the present invention. FIG. 2(1) is a diagram for explaining an outline of a testing machine for displacing the displacement of the test body to obtain a displacement reading weight. Fig. 3 is a graph showing an example of a hysteresis loop in which the relationship between the displacement amount and the load is not obtained by using the above test machine to displace the test body. [Description of main component symbols] 1 : Disc 2 . Steel plate 3 : Test body 4 : Center fixing jig 5 : Left and right fixing jig 6 : Fixed arm 7 : Fitting 8 : Movable disk 9 : Joint Η · Hysteresis loop Keq : Slope Li: line 27 201241086 • _ r I·/ λ t L2 : vertical line w: energy Δw: amount of absorbed energy 28

Claims (1)

201241086 VII. Patent application scope: 1. A high-attenuation composition in which an inorganic filler is formulated in a base polymer, the high-attenuation composition characterized in that the base polymer has a total nitrogen content of 0.3% by mass or less. In the deproteinized natural rubber, the inorganic filler contains at least cerium oxide, and the compounding ratio of the cerium oxide is 100 parts by mass or more and 170 parts by mass or less based on 100 parts by mass of the deproteinized natural rubber. 2. The high-attenuation composition according to claim 1, wherein the deproteinized natural rubber has a total nitrogen content of 0.1% by mass or less. 3. A high-attenuation composition as described in claim 1 or 2, which is used as a material for forming a shock absorber for a building. 29