CROSSLINKABLE FLUORORUBBER COMPOSITION AND CROSSLINKED RUBBER ARTICLE Russian patent published in 2015 - IPC C08L27/12 C08J3/24 C08K5/06 C08K5/14 C08L71/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a crosslinkable fluororubber composition which can yield a crosslinked rubber article, e.g., sealing material. A composition containing fluororubber and a compound of formula: (X-)_x(Z-)_zY, is crosslinked to form a crosslinked rubber article. In said formula, X denotes: U-(CF₂)_aO(CF₂CF₂O)_b-, Z denotes: R^FO(CF₂CF₂O)_c-, Y denotes a (x+z) valent perfluoro saturated hydrocarbon group or a group having an ether oxygen atom embedded between carbon atoms thereof, x is an integer of at least 3, z is an integer of at least 0 and x+z is an integer of at least 3, U denotes a monovalent group having at least one element selected from a group consisting of an unsaturated hydrocarbon, a bromine atom and an iodine atom, R^F denotes a C_1-20 linear perfluoroalkyl group or a group having an ether oxygen atom embedded between carbon atoms thereof, a is an integer from 0 to 20, b is an integer from 1 to 200 and c is an integer from 3 to 200.

EFFECT: crosslinked rubber article has excellent flexibility at low temperature.

10 cl, 1 tbl, 6 ex