High-temperature-resistant perfluoroether fluororubber and preparation method therefor

Abstract

The present application provides a high-temperature-resistant perfluoroether fluororubber and a preparation method therefor. The perfluoroether fluoronubber is in chain segment distribution of A-B, wherein chain segment A is formed by polymerizing tetrafluoroethylene and perfluoroalkyl vinyl ether in a first molar ratio of (75-85):(15-25), chain segment B is formed by polymerizing tetrafluoroethylene and perfluoroalkyl vinyl ether in a second molar ratio of (45-60):(40-55), and chain segment B accounts for 35-45% of the total molar weight of chain segment A and chain segment B. The perfluoroether fluororubber of the present application can withstand a high temperature of 300° C., has low hardness and pressure change, and has good medium resistance and processability.

Dependencies are inferred from the claim text.