| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorine-containing elastomer capable of giving a vulcanization product which has excellent low temperature characteristics and solvent resistance without deteriorating the original moldability/processability and compression permanent set-resistant characteristics of the fluorine-containing elastomer, and to provide a fluorine-containing elastomer composition which has excellent cold resistance, fuel oil resistance, and the like. SOLUTION: This fluorine-containing elastomer whose copolymer composition comprises (a) 50 to 85 mol. % of vinylidene fluoride, (b) 0 to 25 mol. % of tetrafluoroethylene, (c) 7 to 20 mol. % of perfluoro(methylvinyl ether), (d) 3 to 15 mol. % of CF<SB>2</SB>=CFO[CF<SB>2</SB>CF(CF<SB>3</SB>)O]nCF<SB>3</SB>, and (e) 0.1 to 2 mol. % of RfX (Rf is a 2 to 8C unsaturated fluorohydrocarbon group in which one or more ether bonds may be contained; X is bromine or iodine). The fluorine-containing elastomer composition comprises 100 pts. wt. of the fluorine-containing elastomer, 0.1 to 10 pts. wt. of an organic peroxide, 0.1 to 10 pts. wt. of a multi-functional unsaturated compound, and≥2 pts. wt. of an acid receptor. The fluorine-containing elastomer composition gives a cured product having excellent cold resistance and fuel oil resistance. COPYRIGHT: (C)2005,JPO&NCIPI
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