LOW-TEMPERATURE-RESISTANT FLUORINE-CONTAINING ELASTOMER AND PREPARATION METHOD THEREFOR

摘要

The present invention provides a low-temperature-resistant fluorine-containing elastomer formed through polymerization of the comonomers: 40-80 mol% 1,1-vinylidene fluoride, 2-10 mol% tetrafluoroethylene, 10-30 mol% perfluoro (alkyl vinyl ether), and 1-10 mol% vulcanization monomer. The present invention further provides a preparation method of the fluorine-containing elastomer. In the present invention, on basis of a large number of experiments, the contents of the comonomers of the fluorine-containing elastomer are adjusted, so that the low temperature performance thereof is significantly improved, and the low-temperature retraction temperature TR-10<-40°C. Moreover, the rate of the volume change of the fluorine-containing elastomer in methanol decreases, and the oil resistance and the solvent resistance are improved, thereby improving the oil resistant performance and solvent resistant performance of the fluorine-containing elastomer.