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Rubber composition and use thereof

A technology of rubber composition and copolymer, applied in the direction of reducing the influence of physical parameters, reducing the physical parameters of the carrier, and the manufacture of final products, etc., can solve the problems of insufficient heat resistance, etc., and achieve excellent acid resistance, sealing and insertion. Excellent performance and small compression set

Inactive Publication Date: 2011-02-23
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molded article obtained from the above-mentioned conventional rubber composition may be cracked when it is in a high-compression state at a high temperature, so when used as a fuel cell sealing material that raises the reaction temperature, it has heat resistance. insufficient problem

Method used

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  • Rubber composition and use thereof
  • Rubber composition and use thereof
  • Rubber composition and use thereof

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0214] Production of ethylene-propylene-5-vinyl-2-norbornene random copolymer (A-1)

[0215] Using a stainless steel polymerizer (stirring speed = 250 rpm) equipped with a stirring blade with an actual internal volume of 100 liters, ethylene, propylene, and 5-vinyl-2-norbornene (hereinafter, abbreviated as VNB) were continuously subjected to three-way polymerization. copolymerization. From the side of the polymerizer, at a rate of 60 liters of hexane per hour, 1.3 kg of ethylene, 2.5 kg of propylene, and 130 g of VNB, and at a rate of 30 liters of hydrogen per hour, VO(OEt)Cl as a catalyst 2 23 mmol, Al(Et) 1.5 Cl 1.5 The rate of 161 millimoles was continuously supplied to the liquid phase, and copolymerization was carried out at a polymerization temperature of 40°C and a polymerization pressure of 0.7 MPa to obtain an ethylene-propylene-VNB random copolymer (A-1) in the state of a homogeneous solution (hereinafter, Abbreviated as copolymer (A-1)). Then, a small amount o...

Embodiment 1

[0218]100 parts by weight of the copolymer (A-1) obtained in Production Example 1, 15 parts by weight of calcined talc (manufactured by Asada Flour Milling Co., Ltd., trade name: Enstac 24, average particle diameter 7 μm), and precipitation method 2 after surface treatment Silicon oxide (SS-95 manufactured by Tosoh Silica Co., Ltd., BET surface area: 50m 2 / g, secondary particle size (average particle size obtained by Coulter counting method): 2.4 μm, M value: 65) 30 parts by weight, using a planetary mixer with a capacity of 2 liters [manufactured by Inoue Seisakusho] , trade name: PLM-2 type] kneading in the range of 50 ~ 80 ℃, then add and mix platinum-1,3,5,7-tetravinylmethylcyclosiloxane coordination compound [platinum Concentration 0.5% by weight, terminal vinyl siloxane oil solution] 0.4 parts by weight, 0.1 parts by weight of 1-ethynyl-1-cyclohexanol as a reaction inhibitor, 0.1 parts by weight of the following formula [II-1] as a crosslinking agent A rubber compositi...

Embodiment 2

[0233] In Example 1, instead of surface-treated precipitated silica, carbon black (Asahi #50HG manufactured by Asahi Carbon Co., Ltd., iodine adsorption amount: 19 mg / g, average particle diameter 85 nm, DBP absorption amount: 110 cm 3 / 100g) except that 30 parts by weight were carried out in the same manner as in Example 1 to produce a crosslinked rubber sheet and evaluate properties.

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Abstract

A rubber composition which is excellent in sealing properties and acid resistance, has a low reaction force and low hardness, is reduced in compression set, and especially has such high heat resistance that the composition does not crack even when used under high-temperature high-compression conditions. Also provided are a use of the rubber composition and a main body including the rubber composition mounted thereon. The rubber composition is characterized by comprising an ethylene / alpha-olefin / unconjugated polyene copolymer [A] and burned talc [B].

Description

technical field [0001] The present invention relates to rubber compositions and uses thereof. Specifically, the present invention relates to a rubber composition that can be applied to applications such as a fuel cell sealing material, a gasket material for LIM molding, and a sealing material for electric wire connectors, and a rubber composition obtained from the rubber composition. Fuel cell sealing materials, hard disk drive top cover gaskets, gasket materials for LIM molding, sealing materials for wire connectors, and bodies to which these are attached. Background technique [0002] Sealing parts and packing parts used in electrical appliances are important to have excellent barrier properties, sealing properties, etc., satisfy the desired hardness, and have heat resistance that can cope with heat generated when energized, and can be used even in low temperature environments . [0003] For example, as cell sealing materials for fuel cells, etc., materials that are exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08L23/16G11B33/12H01M8/02C08K3/34C08K5/5415C08F236/20C08K13/02
CPCC08K5/5419H01M8/0284G11B33/1466F16J15/102Y02E60/50C08K3/34C08K3/04C08L23/16
Inventor 佐野洋之
Owner NOK CORP
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