Low-compression permanent deformation low-temperature-resistant EPDM sealing strip and preparation method and application thereof

Abstract

The invention belongs to the field of rubber sealing strips, and particularly relates to a low-compression permanent deformation low-temperature-resistant EPDM sealing strip and a preparation method and application thereof. The low-compression permanent deformation low-temperature-resistant EPDM sealing strip is prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 20 to 50 parts of carbon black, 5 to 10 parts of modified boehmite, 2.0 to 5.0 parts of tetrabutyl titanate, 0.5 to 1.0 part of sodium citrate, 3.0 to 5.0 parts of zinc oxide, 1.0 to 2.0 parts of stearic acid, 3.0 to 5.0 parts of polyethylene glycol 6000, 30 to 50 parts of softening plasticizer, 0.5 to 1.0 part of accelerant MMB-80, 1.5 to 2.0 parts of accelerant CBS-80, 0.5 to 1.0 part of an accelerant ETU-80, 0.5 to 1.0 part of an accelerant TMTD-80, 1.0 to 1.5 parts of an anti-aging agent 1010 and 1.0 to 1.5 parts of a vulcanizing agent S-80. According to the low-compression permanent deformation low-temperature-resistant EPDM sealing strip and the preparation method thereof, the preparation method is simple in process, the materials are easy to obtain, the EPDM sealing strip is suitable for industrial production, and the prepared EPDM sealing strip is low in compression permanent deformation, good in low temperature resistance and excellent in sealing performance.

Description

technical field [0001] The invention belongs to the field of rubber sealing strips, and more specifically relates to a low-compression permanent deformation-resistant low-temperature EPDM sealing strip and a preparation method and application thereof. Background technique [0002] EPDM (Ethylene Propylene Diene Monomer) is ethylene-propylene-diene rubber, which is a copolymer of ethylene, propylene and a small amount of non-conjugated diene. Its main chain is composed of chemically stable saturated hydrocarbons, and only contains unsaturated double bonds in the side chains, so it has excellent aging resistance such as ozone resistance, heat resistance, and weather resistance, and can be widely used in automotive parts, waterproof materials for construction, Wire and cable sheaths, heat-resistant hoses, tapes, automotive seals, etc. [0003] The automobile sealing strip is installed on the sheet metal around the automobile door, which mainly plays the role of sealing, dustpr...

AI Technical Summary

Problems solved by technology

The sealing section of the weatherstrip is made of vulcanized elastomeric material, especially EPDM, and the core or a core section is extruded in connection with the vulcanized sealing section Above, the section of the core component is connected to the rest of the core component, but the sealing strip is prone to problems such as low yield rate due to technical maturity and unstable handling of the equipment

In the process of realizing the present invention, the inventors found the following problems in the prior art: At present, although there are many manufacturers of passenger car sealing strips in China, they generally lack experience in the processing technology of sealing strips and lack understanding of door and window sealing strips, so , the overall quality level of the sealing strip is not high

Common problems in the domestic passenger car sealing strip industry include large size fluctuations, poor comprehensive mechanical properties, poor high and low temperature resistance, etc.

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