High-temperature-resistant ethylene propylene rubber sealing pad and preparation method and application thereof

Abstract

The invention relates to the technical field of ethylene propylene rubber sealing pads, in particular to a high-temperature-resistant ethylene propylene rubber sealing pad and a preparation method and application thereof. The high-temperature-resistant ethylene propylene rubber sealing pad is made from ethylene propylene copolymer, furnace carbon black, spray carbon black, zinc oxide, aluminum oxide, a vulcanizing agent, an assistant cross-linker, an anti-aging agent and the like, wherein fully saturated ethylene propylene copolymer is used as a rubber raw material, and the prepared high-temperature-resistant ethylene propylene rubber sealing pad has excellent weatherability, dielectric resistance and temperature tolerance, may be used for a long time at 150 DEG C and may be used temporarily or intermittently at 180 DEG C, fatigue resistance and high-temperature aging resistance of the traditional ethylene propylene rubber sealing pad are improved, and the problems of the prior art that high-temperature fatigue performance is low and the use at 150 DEG C is only temporary or intermittent are solved.

Description

technical field [0001] The invention relates to the technical field of ethylene-propylene rubber sealing gaskets, in particular to a high-temperature-resistant ethylene-propylene rubber sealing gasket and its preparation method and application. Background technique [0002] As an important part of the plate heat exchanger, the gasket has an important impact on the service life of the plate heat exchanger. The sealing gasket should not only seal the medium so that it does not leak to the external environment, but also prevent the heat exchange medium from mixing. If there is a problem with the gasket, it may cause the plate heat exchanger to fail to operate normally. [0003] Rubber gaskets are commonly used gaskets in plate heat exchangers. The materials of rubber sealing gaskets mainly include ethylene propylene diene monomer (EPDM), nitrile rubber (NBR), fluorine rubber (FPM) and so on. EPDM is a ternary random copolymer of ethylene, propylene and a small amount of non-...

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Problems solved by technology

[0005] In view of the above problems, one of the objectives of the present invention is to provide a high temperature resistant ethylene propylene rubber sealing gasket, the high temperature resistant ethylene propylene rubber sealing gasket is made of binary ethylene propylene rubber, furnace carbon black, spray carbon Black, zinc oxide, aluminum oxide, vulcanizing agent, cross-linking agent and anti-aging agent, among which fully saturated binary ethylene-propylene rubber is used as the rubber raw material, and the high-temperature resistant ethylene-propylene rubber sealing gasket has superior Weather resistance, medium resistance, temperature resistance, can be used for a long time under the working condition of 150 ℃, and can be used temporarily or intermittently at 180 ℃, which improves the fatigue resistance and high temperature aging resistance of traditional EPDM gaskets , to overcome the problems and deficiencies in the prior art that have low high-temperature fatigue performance and can only be used briefly or intermittently at 150°C; the high-temperature-resistant ethylene-propylene sealing gasket provided by the invention meets the three-component The national standard for ethylene propylene rubber gaskets can replace the commonly used EPDM gaskets to meet higher working conditions

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