Fluorine-containing elastomer and crosslinkable composition comprising same

摘要

The present invention provides a TFE/Pr type elastomer being excellent in not only amine resistance but also heat resistance and chemical resistance and having a small gel content, and a crosslinkable composition comprising the elastomer. The above-mentioned fluorine-containing elastomer is a fluorine-containing elastomer being crosslinkable with the compound (A), comprising 40 to 70% by mole of tetrafluoroethylene unit, 30 to 60% by mole of propylene unit and 0.1 to 2.5% by mole of a carboxyl group-containing vinyl monomer unit and having a Mooney viscosity at 121° C. of 5 to 100.

主权项

1. A fluorine-containing elastomer composition comprising
(A) at least one compound selected from the group consisting of a compound having at least two crosslinkable reaction groups represented by the formula (1): wherein R1s are the same or different and each is —NH2, —NHR2, —OH or —SH; R2 is a fluorine atom or a monovalent organic group, and the compound (A) is a tetramine crosslinking agent or R1 is —OH, and (B) a fluorine-containing elastomer which is crosslinkable with the compound (A), comprises 40 to 70% by mole of tetrafluoroethylene unit, 30 to 60% by mole of propylene unit and 0.6 to 1.3% by mole of a carboxyl group-containing vinyl monomer unit and has a Mooney viscosity at 121° C. of 5 to 100.