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Rubber composition and use thereof

A technology of rubber composition and compound, which is applied in fuel cell parts, sealing/supporting devices, etc., can solve the problems of slow crosslinking speed and insufficient mechanical properties, and achieve excellent gas barrier properties and excellent compression set characteristics , excellent sealing effect

Inactive Publication Date: 2008-07-02
MITSUI CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, with the increasing demand for improved mechanical properties of wire connectors, existing sealing materials have insufficient mechanical properties, except that the cross-linking speed after vacuum degassing is reduced, so it is desired to improve their performance.

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

[0209] [Production of ethylene-propylene-5-vinyl-2-norbornene random copolymer [A-1]]

[0210] Terpolymerization of ethylene, propylene, and 5-vinyl-2-norbornene (hereinafter abbreviated as VNB) was continuously carried out using a stainless steel polymerizer with a stirring blade and an actual internal volume of 100 liters (stirring speed = 250 rpm). From the side of the polymerizer, at the rate of 60 liters of hexane per hour, 1.3 kg of ethylene, 2.5 kg of propylene, and 130 g of VNB, and 30 liters of hydrogen per hour, VO(OEt)Cl as a catalyst 2 23 mmol, Al(Et) 1.5 Cl 1.5 A rate of 161 mmoles was continuously supplied to the liquid phase. The copolymerization reaction was carried out under the conditions described above and in Table 1 to obtain an ethylene-propylene-VNB random copolymer [A-1] (hereinafter, simply referred to as copolymer [A-1]) in the state of a homogeneous solution. Then, a small amount of methanol was added to the polymerization solution continuously dr...

Embodiment 1

[0219] First, 100 parts by weight of the copolymer [A-1] shown in Table 1, 15 parts by weight of carbon black [produced by Asahi Carbon Co., Ltd., trade name F-200], talc [produced by Takehara Chemical Industry Co., Ltd., trade name Hi Micron (High Micron) HE-5] 20 parts by weight, and silica [produced by Ryusen Co., Ltd., trade name crystallite (Crystallite)] 20 parts by weight, with a planetary mixer with a capacity of 2 liters [manufactured by Inoue Co., Ltd. Produced, trade name: PLM-2 type] carry out kneading, obtain complex.

[0220] Then, 5 parts by weight of the above-mentioned SiH group-containing compound [C-1] (crosslinking agent), 0.1 part by weight of ethynylcyclohexanol as a reaction inhibitor, and platinum-1,3 were added to 160 parts by weight of the complex, 5,7-Tetravinylmethylcyclosiloxane complex [platinum concentration 0.5% by weight, terminal vinyl siloxane oil solution] 0.4 parts by weight, with 3 rollers of Φ3 inches [manufactured by Kodaira Co., Ltd. ,...

Embodiment 2～7

[0233] A sheet was obtained in the same manner as in Example 1, except that the above SiH group-containing compounds [C-2] to [C-7] were used instead of 5 parts by weight of the SiH group-containing compound [C-1] used in Example 1. Table 2 shows the SiH group-containing compound used and the amount thereof together with the evaluation results of these sheets.

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Abstract

Disclosed is a rubber composition improved in mechanical characteristics while maintaining excellent various characteristics which is suitably used for fuel cell sealing members, hard-disk-drive topcover gasket members, and sealing members for electric wire connectors. Also disclosed are main bodies mounted with the respective members which are obtained by using such a rubber composition. Specifically disclosed is a rubber composition containing a specific ethylene / a-olefin / unconjugated polyene copolymer wherein the unconjugated polyene is a norbornene compound, a specific SiH group-containing compound, and if necessary an organopolysiloxane. This rubber composition is excellent in mechanical characteristics and particularly suitably used for fuel cell sealing agents, hard-disk-drive topcover gaskets, and sealing members for electric wire connectors.

Description

technical field [0001] The present invention relates to rubber compositions suitable for applications such as fuel cell sealing materials, hard disk drive top cover gaskets, and electric wire connector sealing materials. In addition to its properties, it is a rubber composition with particularly excellent mechanical properties. [0002] Furthermore, the present invention relates to a fuel cell sealing material obtained from the rubber composition, a hard disk drive top cover gasket, and a sealing material for electric wire connectors, and a body mounted with these materials. Background technique [0003] Fuel cells are highly efficient and clean power generation systems, and in recent years they have attracted attention as new energy systems for automobiles and households. As battery sealing materials for fuel cells, etc., low-cost materials with excellent heat resistance, acid resistance, air permeability and high-speed formability are required. At present, fluororubber is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K5/5419H01M8/02
CPCC08K5/5419C08L23/16H01M8/0284Y02E60/50C08L83/00C08L23/00H01M8/02C08L23/04
Inventor 白田孝川崎邦义
Owner MITSUI CHEM INC
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