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US 12,194,717 B2Granted
Air management system member and fluororubber composition
AssigneeDaikin Industries, Ltd.
InventorsKouhei Takemura, Yusuke Kamiya
Life of this patent
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Abstract
An air management system component containing a crosslinked fluoroelastomer layer obtained by crosslinking a fluoroelastomer composition that contains a peroxide-crosslinkable fluoroelastomer and a hydrotalcite compound. Also disclosed is the fluoroelastomer composition.
Claims4
An air management system component comprising a crosslinked fluoroelastomer layer obtained by crosslinking a fluoroelastomer composition that contains a peroxide-crosslinkable fluoroelastomer and a hydrotalcite compound,
- wherein the hydrotalcite compound is present in an amount of 0.5 to 10 parts by mass relative to 100 parts by mass of the fluoroelastomer,
- wherein a mass ratio of the fluoroelastomer to a total mass of the crosslinked fluoroelastomer layer is from 100:135.5 to 100:127.5,
- wherein the crosslinked fluoroelastomer layer constitutes a laminate with a rubber layer comprising silicone rubber,
- wherein the crosslinked fluoroelastomer layer is in direct contact with a rubber layer,
- wherein a crosslinking agent is a peroxide-generating crosslinking agent,
- wherein the air management system component is used for an exhaust gas recirculation hose,
- wherein the peroxide-crosslinkable fluoroelastomer comprises a structural unit derived from VdF and a structural unit derived from HFP,
- wherein the silicone rubber comprises a peroxide-crosslinkable polyorganosiloxane, and
- wherein the laminate is obtained by a method in which a non-crosslinked fluoroelastomer layer and a non-crosslinked silicone rubber layer are crosslink-bonded to each other in at least one process selected from the group consisting of a process comprising a primary crosslinking step at 150° C. to 180° C. and a secondary crosslinking step at 170° C. to 250° C., and a process comprising a crosslinking step at 150° C. to 180° C.
6 more elements
Dependencies are inferred from the claim text.