| 摘要 |
To provide a crosslinkable fluororubber composition which can give a crosslinked rubber article excellent in flexibility at a low temperature, and the crosslinked rubber article. A crosslinkable fluororubber composition comprising a fluororubber and a compound represented by (X-) x (Z-) z Y, is crosslinked to form a crosslinked rubber article. In the formula, X is U-(CF 2 ) a O(CF 2 CF 2 O) b -, Z is R F O(CF 2 CF 2 O) c -, Y is a (x+z) valent perfluoro saturated hydrocarbon group or such a group having an etheric oxygen atom inserted between carbon atoms thereof, x is an integer of at least 3, z is an integer of at least 0, x+z is an integer of at least 3, U is a monovalent group having at least one member selected from the group consisting of an unsaturated hydrocarbon, a bromine atom and an iodine atom, R F is a C 1-20 linear perfluoroalkyl group or such a group having an etheric oxygen atom inserted between carbon atoms thereof, a is an integer of from 0 to 20, b is an integer of from 1 to 200, and c is an integer of from 3 to 200. |
