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EPDM (ethylene-propylene-diene monomer) composition and hose

A technology of EPDM rubber and composition, which is applied in the direction of hose, pipe, pipe/pipe joint/pipe fitting, etc., can solve the problems of high temperature resistance and insufficient resistance to electrochemical corrosion, etc.

Inactive Publication Date: 2011-04-13
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a technique to solve such problems, in the prior art, a composition of EPDM rubber was used in the rubber layer to produce a hose, which was found to have sufficient physical properties such as low-temperature resistance, ozone resistance, etc. , weather aging resistance, but its high temperature resistance and electrochemical corrosion resistance are insufficient

Method used

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  • EPDM (ethylene-propylene-diene monomer) composition and hose
  • EPDM (ethylene-propylene-diene monomer) composition and hose

Examples

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Embodiment Construction

[0038] The formula of the EPDM composition according to the present invention and the hose prepared are described in the following table. The proportions of the components of the formula are parts by mass. If the hose adopts the usual preparation method in the summary of the invention, they are listed at the same time. Corresponding performance parameters.

[0039]

[0040]

[0041] In the above-mentioned examples and comparative examples, DCPD-EPDM is the ethylene-propylene-diene rubber whose third monomer is dicyclopentadiene, and ENB-EPDM is the ethylene-propylene-diene rubber whose third monomer is methylene norbornene, VNB-EPDM is EPDM rubber whose third monomer is 5-vinylidene 2-norbornene. Of the three EPDM rubbers, VNB-EPDM has the best heat resistance.

[0042] It can be seen from the above examples and comparative examples that the EPDM rubber, carbon black, silicone powder and peroxide vulcanization system of the third monomer VNB are preferred, which can be m...

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Abstract

The invention relates to an EPDM (ethylene-propylene-diene monomer) composition and a hose, wherein the composition comprises the following components: ethylene-propylene-diene monomer, fast extruding furnace black, Sillitin powder, paraffin oil, magnesium oxide, poly(1,2-dihydro-2,2,4-trimethyl-quinoline), polyethylene glycol, 1,3-bis(tert-Butylperoxy-isopropyl)benzene, and triallyl isocyanurate. The EPDM composition can be used for preparing a hose which has the advantages of excellent high-temperature resistance, electrochemical corrosion resistance and sufficient physical properties, wherein the high-temperature resistance of the prepared hose is shown as follows: the elongation of the hose is minus 7.9 percent after being subjected to thermal aging for 94 hours at the temperature of 170 DEG C, and the permanent deformation rate of the hose is 60 percent after being compressed for 22 hours at the temperature of 120 DEG C; and the electrochemical corrosion resistance of the hose is shown as follows: the volume resistivity is 1*1012 ohm.cm, and the hose has no crack after being subjected to electrochemical degradation for 504 hours at the temperature of 115 DEG C and at a voltage of 12V.

Description

technical field [0001] The invention relates to a EPDM composition and a hose made by using the EPDM composition. Background technique [0002] EPDM rubber has excellent properties such as flex resistance, low temperature resistance, ozone resistance, weathering resistance, heat resistance, water vapor resistance, electrical insulation and chemical medium resistance, and they can be used as various hoses Such as automotive air-conditioning hoses, cooling water pipes, heating pipes, sunroof drain pipes, cable sheaths, gaskets, and other molding materials. [0003] Among such molding materials, it is required that the automobile cooling water pipe made by using EPDM rubber for the rubber layer should have high temperature resistance and electrochemical corrosion resistance. Because when this type of hose is in contact with coolant and hot air at high temperatures, the EPDM composition constituting the rubber layer will degrade or harden in a short time, forming cracks in the ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K3/04C08K3/22C08K5/14C08K5/3492C08K3/34C08K3/36F16L11/04
Inventor 张洪起王学荣
Owner TIANJIN PENGYI GRP CO LTD
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