Environment-friendly low-pressure-change binary fluororubber and preparation process thereof

The environment-friendly low-pressure-change binary fluororubber is prepared from the following raw material components in parts by weight: 60 to 75 parts of raw fluororubber; 1.5 to 4.0 parts of magnesium oxide; 3-6 parts of calcium hydroxide; 16 to 26 parts of carbon black; 0.5 to 1.5 parts of a processing aid; when the binary fluororubber is prepared, the raw materials are added into an internal mixer in proportion at one time for internal mixing, and then the binary fluororubber is obtained after vulcanization. According to the invention, the novel fluorine-containing surfactant is used as the emulsifier in the polymerization process of the fluororubber, so that not only is the hidden danger of environmental protection in the process of preparing the fluororubber from perfluorooctanoic acid solved, but also the index performance of the fluororubber and the low pressure change performance of the fluororubber can be improved, and the preparation method is low in process production cost and has relatively hi