Perfluororubber sealing ring and preparation method thereof

The invention relates to the technical field of fluororubber sealing ring processing, in particular to a perfluororubber sealing ring and a preparation method thereof.The perfluororubber sealing ring is prepared from, by weight, 60-80 parts of perfluororubber, 20-30 parts of polyurethane resin, 20-40 parts of inorganic nanofiller, 3-5 parts of a cross-linking agent, 1-2 parts of an accelerant, 1-2 parts of a vulcanizing agent and 4-9 parts of a modifier. Each part of the modifier is prepared by mixing a maleic anhydride grafted copolymer, a siloxane copolymer and a dispersing agent according to the weight part ratio of (4-5): (6-9): 5, and the fluororubber sealing ring prepared according to the formula has good low-temperature resistance and can be used for a long time under the condition of minus 40 DEG C. 本申请涉及氟橡胶密封圈加工技术领域，更具体地说，涉及一种全氟橡胶密封圈及其制备方法，由以下重量份的原料制备得到：全氟橡胶60-80份、聚氨酯树脂20-30份、无机纳米填料20-40份、交联剂3-5份、促进剂1-2份、硫化剂1-2份和改性剂4-9份，每份所述改性剂是由马来酸酐接枝共聚物、硅氧烷共聚物和分散剂按照重量份比为（4-5）：（6-9）：5混合制备得到，通过上述配方制备得到氟橡胶密封圈具有良好的耐低温性