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Ethylene-propylene-diene rubber foam, method for producing same, and sealing material

A technology of diene rubber and foam, applied in sealing devices, chemical instruments and methods, adhesives, etc., can solve problems such as corrosion components, achieve reduced corrosion, excellent flexibility, adhesion and height difference followability good effect

Inactive Publication Date: 2014-05-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when EPDM is crosslinked with sulfur, depending on the type of member to be sealed, the member may be corroded by the sulfur remaining in the EPDM foam

Method used

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  • Ethylene-propylene-diene rubber foam, method for producing same, and sealing material
  • Ethylene-propylene-diene rubber foam, method for producing same, and sealing material
  • Ethylene-propylene-diene rubber foam, method for producing same, and sealing material

Examples

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Embodiment

[0144] Examples and comparative examples are shown below to describe the present invention more specifically. In addition, this invention is not limited at all by an Example and a comparative example.

[0145] (1) Manufacture of EPDM foam

[0146] According to the compounding amount recorded in the compounding prescription shown in Table 1 and Table 2, resin, crosslinking aid, processing aid, pigment, fire retardant, filler and softening agent (also N, N' in Comparative Example 1 -dibutylthiourea) and mixed with a 3L pressurized kneader to prepare a primary mixture.

[0147] In addition, add crosslinking agent, vulcanization retarder (except N,N'-dibutylthiourea), anti-aging agent, foaming agent and foaming aid. Thereafter, the resulting compound was blended into the primary mixture and kneaded with a 10-inch mixing roll to prepare a rubber composition (secondary mixture) (kneading process).

[0148] Next, the rubber composition was extruded into a sheet with a thickness of...

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Abstract

This ethylene-propylene-diene rubber foam results from foaming a rubber composition containing an ethylene-propylene-diene rubber. The ethylene-propylene-diene rubber foam has a 50% compression load value of 0.1-2.0 N / cm2. The sulfur atom content calculated on the basis of the measurement results of fluorescence X-ray measurement is no greater than 1000 ppm by mass.

Description

technical field [0001] The present invention relates to an ethylene-propylene-diene rubber foam, a sealing material including the ethylene-propylene-diene rubber foam, and a method for producing the ethylene-propylene-diene rubber foam. Specifically, it relates to an ethylene-propylene-diene rubber foam suitable for use as a sealing material for various industrial products, a sealing material comprising the ethylene-propylene-diene rubber foam, and an ethylene-propylene-diene rubber Method for producing foam. Background technique [0002] Conventionally, an EPDM foam obtained by foaming ethylene-propylene-diene rubber (hereinafter, sometimes abbreviated as EPDM) is known as a sealing material for various industrial products. [0003] EPDM foams are generally produced by foaming with a blowing agent and crosslinking with sulfur. However, when EPDM is crosslinked with sulfur, depending on the type of member to be sealed, the member may be corroded by sulfur remaining in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08K5/14C08K5/33C08L23/16C08L71/02C09K3/10C09J7/26
CPCC08J9/04C09K3/10C08J9/0028C08J2201/026C08J2323/16C09K2200/0642C09J7/26Y10T428/249983B29C48/022C08L23/16C08F36/04
Inventor 岩濑崇行川田让司
Owner NITTO DENKO CORP