高乙烯含量和低门尼粘度三元乙丙橡胶在密封制品和绝缘材料中的应用

Application of EPDM with High Ethylene Content and Low Mooney Viscosity in Sealing Products and Insulating Materials

研究高乙烯含量和低门尼粘度三元乙丙橡胶(EPDM)Keltan®2470C(以下简称K2470C)在高硬度汽车密封条和电线电缆护套绝缘层中的应用,并与其他牌号的EPDM进行对比。结果表明:K2470C的乙烯含量高,相对分子质量分布较窄,门尼粘度低,其高硬度胶料老化前后的邵尔A型硬度、100%定伸应力、拉伸强度和撕裂强度较高,K2470C特别适合在高硬度汽车密封条中应用;同时,K2470C具有良好的加工性能和电性能,适合在低压和中压电线电缆护套绝缘层中应用。

The application of ethylene propylene diene rubber(EPDM)Keltan®2470C(hereinafter referred to as K2470C)with high ethylene content and low Mooney viscosity in high hardness automobile sealing strip and insulating layer of electric wire and cable sheath was studied,and compared with other grade EPDM.The results showed that K2470C had high ethylene content and narrow molecular weight distribution,and its Mooney viscosity was low.K2470C high hardness compound had high Shore A hardness,high tensile stress at 100%elongation,high tensile strength and tear strength before and after aging,so K2470C was particularly suitable for the application in high hardness automobile sealing strip.At the same time,K2470C had good processability and electrical insulation properties,therefore it was also suitable for the application in insulating layer of low voltage and medium voltage electric wire and cable sheath.