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Epichlorohydrin rubber composition, crosslinked epichlorohydrin rubber object, and diaphragm and bladder for accumulator

A technology of epichlorohydrin and rubber composition, applied in the direction of actuator accumulator, diaphragm, bellows, etc., can solve the problems of high impact embrittlement temperature, it is difficult to take into account gas barrier properties and cold resistance, etc. Good roll workability and excellent balance

Inactive Publication Date: 2019-11-05
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a large amount of filler is added to the rubber, the impact embrittlement temperature at low temperature may increase
[0006] That is, even if acrylonitrile rubber is appropriately selected according to the content of acrylonitrile and a flat filler is added in an appropriate amount, it is difficult to achieve a balance between gas barrier properties and cold resistance.

Method used

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  • Epichlorohydrin rubber composition, crosslinked epichlorohydrin rubber object, and diaphragm and bladder for accumulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] With respect to 100 parts by weight of GECO, instead of blending carbon black, 30 parts by weight of a flat filler ("Sericite FSN" manufactured by Sanshin Mining Co., Ltd., the average particle diameter of the flat surface = 5 μm) was blended to obtain epoxy chlorine Propane rubber composition.

[0047] Next, sulfur was blended into the obtained epichlorohydrin rubber composition as a crosslinking agent to obtain a raw material (uncrosslinked). Sulfur is a crosslinking agent that does not dechlorinate GECO during the crosslinking reaction.

[0048] Next, the raw materials were kneaded using a roll kneader, and then cross-linked and molded to obtain a cross-linked epichlorohydrin rubber.

Embodiment 2

[0050] In Example 1, except having changed the compounding quantity of a flat filler to 60 weight part, it carried out similarly to Example 1, and obtained the epichlorohydrin rubber crosslinked body.

Embodiment 3

[0052] In Example 1, except that 30 parts by weight of carbon black (manufactured by Tokai Carbon Co., Ltd. "Seast G-SO") was blended into the epichlorohydrin rubber composition, epichlorohydrin was obtained in the same manner as in Example 1. Rubber cross-linked body.

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Abstract

To provide: an epichlorohydrin rubber composition which has an excellent balance between gas-barrier properties and cold resistance and has satisfactory rollability; a crosslinked epichlorohydrin rubber object; and a material for accumulators. [Solution] An epichlorohydrin rubber composition obtained by compounding 100 parts by weight of an epichlorohydrin / ethylene oxide / allyl glycidyl ether terpolymer rubber with 30-60 parts by weight of a flat filler and optionally further with up to 60 parts by weight of carbon black; a crosslinked epichlorohydrin rubber object obtained by crosslinking thecomposition with a crosslinking agent; and a material for accumulators which comprises the crosslinked object.

Description

technical field [0001] The present invention relates to an epichlorohydrin rubber (epichlorohydrin rubber) composition, a cross-linked epichlorohydrin rubber, a diaphragm for an accumulator, and an air bag, and more specifically, relates to a balance between gas barrier properties and cold resistance Epichlorohydrin rubber composition with excellent roll processability, cross-linked epichlorohydrin rubber, diaphragm for accumulator, and air bag. Background technique [0002] As the rubber material used for the accumulator airbag and the diaphragm, a material excellent in gas barrier properties is used. Depending on the application, an excellent material with a good balance of properties such as cold resistance, heat resistance, and oil resistance is required in addition to gas barrier properties. [0003] As rubber polymers, although there are substances that are excellent in some of the characteristics of gas barrier properties, cold resistance, heat resistance, and oil re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/02C08K3/011C08K3/013C08K3/04C08K3/34
CPCC08K3/04C08K3/34C08K2201/005C08K3/06C08K5/14C08L71/03C08G65/14F15B2201/3152F15B2201/61F16J3/02F16J3/041C08K3/346C08K7/00C08K2201/016C08L2201/08C08L2201/14
Inventor 阿部俊介
Owner NOK CORP