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Rubber composition and use thereof

A technology of rubber composition and compound, applied in other chemical processes, mechanical equipment, fuel cell parts, etc., can solve the problems of acid resistance, insufficient gas permeability resistance, etc., and achieve excellent gas permeability resistance, Effects of excellent compression set resistance and high-speed formability

Inactive Publication Date: 2012-12-26
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the acid resistance and gas permeation resistance of this silicone rubber composition are insufficient, a rubber composition that is excellent in acid resistance and gas permeation resistance and has self-adhesive properties to organic resins such as PET, PEN, and PBT is being sought. thing

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

preparation example Construction

[0071] The preparation method of the copolymer [A] of the present invention is, for example, carried out at a polymerization temperature of 30-60°C (preferably 30-50°C) in the presence of a catalyst containing the following vanadium compound (a) and an organoaluminum compound (b) as main components ℃), the polymerization pressure is 4~12kgf / cm 2 (preferably 5-8kgf / cm 2 ), the molar ratio (non-conjugated polyene / ethylene) of the supply amount of non-conjugated polyene and ethylene is 0.01 to 0.2, and ethylene, α-olefin and the above-mentioned non-conjugated polyene (preferably containing vinyl norbornene compound) copolymerization. The above-mentioned copolymerization reaction is preferably carried out in a hydrocarbon medium.

[0072] Among the vanadium compounds (a), for example, the general formula VO(OR) can be cited a x b or V (OR) c x d (In the formula, R is a hydrocarbon group, 0≤a≤3, 0≤b≤3, 2≤a+b≤3, 0≤c≤4, 0≤d≤4, 3≤c+d≤4) represented vanadium compounds, or their ...

Embodiment

[0129] Hereinafter, the present invention will be more specifically described based on examples, but the present invention is not limited to these examples.

[0130] The compounding components of the rubber composition used in Examples 1-7 and Comparative Examples 1-8 are as follows.

[0131] ・Ethylene・α-Olefin・Non-conjugated polyene copolymer[A]

[0132] For Examples 1 to 7 and Comparative Examples 1 to 8, ethylene·propylene·5-vinyl-2-norbornene random copolymer (ethylene content: 52.7% by mass, propylene content: 42.6% by mass, 5- Vinyl-2-norbornene content: 4.7% by mass, iodine value 25g / 100g, complex viscosity at 25°C (complex viscosity measured using a viscoelasticity measuring device MCR-301 manufactured by Anton Paar Co., Ltd.) (1% deformation) : 1100 Pa·sec, intrinsic viscosity [η] measured in a decahydronaphthalene solution at 135° C.: 0.28 dl / g, “PX-062” manufactured by Mitsui Chemicals Co., Ltd.).

[0133] ・SiH group-containing compound having two SiH groups in on...

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Abstract

Provided is a rubber composition, which has excellent heat resistance, acid resistance, gas permeability resistance, and high-speed moldability, has low hardness and low counterforce, has excellent high-temperature compression set, and does not adhere to the metal of molds, etc. but is self-adhering with respect to organic resins. The rubber composition comprises: a predetermined ethylene / a-olefin / non-conjugated polyene copolymer [A]; a predetermined SiH group-containing compound [B-1] having two SiH groups per molecule and / or a predetermined SiH group-containing compound [B-2] having three SiH groups per molecule; and a predetermined methacrylic acid ester compound [C].

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 used for various gasket materials such as fuel cell gasket materials and various seal materials, and fuel cell gasket materials and seal materials obtained from the rubber composition , and the main body installed with these materials. Background technique [0002] Fuel cells are highly efficient and clean power generation systems that directly output electricity through the reverse reaction of water electrolysis, even through the chemical reaction of hydrogen and oxygen, and are attracting attention as new energy systems for automobiles and households. A low-cost material excellent in heat resistance, acid resistance, gas permeability resistance, and high-speed moldability is required as a fuel cell cell sealing member. Currently, fluororubber is suitable for heat resistance and acid resistance, butyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/101C08K5/5419C08L83/05C09K3/10F16J15/10H01M8/02
CPCC08K5/5419C09K2200/0642H01M8/0284C09K2200/0625Y02E60/50C08G77/02C09K3/10C08K5/103F16J15/102C08L83/04C08L2666/04C08L23/16
Inventor 长谷川知则
Owner NOK CORP
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