Patent ID: 8450423
Filing Date: 2013-05-28
Classification: C08J,C08K,C08L

Abstract:
1. A fluoroelastomer mixture, comprising: a peroxide-vulcanizable fluoroelastomer (A) containing an iodine atom; and a peroxide-vulcanizable fluoroelastomer (B) containing an iodine atom, the fluoroelastomer (A) being a copolymer (a1) consisting of 50 to 85 mol % of a vinylidene fluoride unit and 15 to 50 mol % of a perfluoro(alkyl vinyl ether) unit, or a copolymer (a2) consisting of 45 to 85 mol % of a vinylidene fluoride unit, 1 to 30 mol % of a tetrafluoroethylene unit, and 14 to 30 mol % of a perfluoro(alkyl vinyl ether) unit, a fluorine content of the fluoroelastomer (B) being 70.0% by mass or more, wherein the fluoroelastomer (B) is at least one copolymer selected from the group consisting of: a copolymer (b1) consisting of 45 to 85 mol % of a tetrafluoroethylene unit and 15 to 55 mol % of a perfluoro(alkyl vinyl ether) unit; a copolymer (b2) consisting of 15 to 85 mol % of a tetrafluoroethylene unit, 1 to 30 mol % of an ethylene unit, and 14 to 55 mol % of a perfluoro(alkyl vinyl ether) unit; and a copolymer (b3) consisting of 25 to 85 mol % of a vinylidene fluoride unit, 0 to 40 mol % of a tetrafluoroethylene unit, and 15 to 40 mol % of a hexafluoropropylene unit, and wherein a mass ratio (A)/(B) of the fluoroelastomer (A) to the fluoroelastomer (B) is 60/40 to 95/5.