Elastomer composition, sealing material, and method for producing sealing material
One embodiment of the present invention relates to an elastomer composition, a sealing material, or a method for producing a sealing material, in which the elastomer composition includes a crosslinkable fluoroelastomer (A1) that is other than a perfluoroelastomer and has a fluorine content of 69% by mass or more and a crosslinkable fluoroelastomer (A2) that is other than a perfluoroelastomer and has a fluorine content in a range of 55 to 68% by mass, and a content of the fluoroelastomer (A1) is 60 to 95% by mass based on 100% by mass of the total of the fluoroelastomers (A1) and (A2).
1 . An elastomer composition comprising:
a crosslinkable fluoroelastomer (A1) that is other than a perfluoroelastomer and has a fluorine content of 69% by mass or more; and
a crosslinkable fluoroelastomer (A2) that is other than a perfluoroelastomer and has a fluorine content in a range of 55 to 68% by mass,
wherein a content of the fluoroelastomer (A1) is 60 to 95% by mass based on 100% by mass of a total of the fluoroelastomers (A1) and (A2), and
wherein the fluoroelastomer (A2) is at least one compound selected from a vinylidene fluoride-propylene-tetrafluoroethylene polymer, an ethylene-tetrafluoroethylene-perfluoroalkyl vinyl ether polymer, and a vinylidene fluoride-tetrafluoroethylene-perfluoroalkyl vinyl ether polymer.
2 . The elastomer composition according to claim 1 , wherein the fluoroelastomers (A1) and (A2) are peroxide-crosslinkable fluoroelastomers.
3 . The elastomer composition according to claim 1 , comprising at least one ethylenically unsaturated bond-containing compound (B) selected from compounds having a perfluoro skeleton having an ethylenically unsaturated bond and compounds having a siloxane skeleton having an ethylenically unsaturated bond.
4 . The elastomer composition according to claim 1 , comprising a crosslinking agent.
5 . The elastomer composition according to claim 1 , wherein a content of a filler is 5 parts by mass or less based on 100 parts by mass of a total of the fluoroelastomers (A1) and (A2).
6 . A sealing material obtained from the elastomer composition according to claim 1 .
7 . A method for producing a sealing material, comprising a step of crosslinking the elastomer composition according to claim 1 .