Electromagnetic shielding rubber and preparation method thereof

The invention relates to an electromagnetic shielding rubber and a preparation method thereof. The electromagnetic shielding rubber is prepared from, by weight, 100 parts of matrix rubber, 5-15 parts of a modifier, 250-300 parts of a shielding agent and 1-10 parts of a vulcanizing agent, wherein the shielding agent comprises magnetic metal powder subjected to sheet-shaped treatment, metal-plated fibers and silver powder or silver-plated powder. The electromagnetic shielding rubber has excellent electromagnetic shielding performance and conductivity, is suitable for the field of aerospace electronics (the shielding effectiveness of a shielding material is required to reach 60dB or above), and is good in sealing performance and mechanical performance, small in density and low in cost. 本发明涉及一种电磁屏蔽橡胶及其制备方法。该电磁屏蔽橡胶以重量份计，由包括如下组分的原料制备而成：基体橡胶100份、改性剂5～15份、屏蔽剂250～300份、及硫化剂1～10份；其中，所述屏蔽剂包括片状处理的磁性金属粉、镀金属纤维，以及银粉或镀银粉。该电磁屏蔽橡胶具有优异的电磁屏蔽性能和导电性能，适用于航天航空电子领域(要求屏蔽材料达到60dB以上的屏蔽效能)，同时密封性和力学性能良好，密度小、成本低。