FUEL-LOW-PERMEABLE BLOCK COPOLYMER

PROBLEM TO BE SOLVED: To provide a block copolymer and a composition for peroxide vulcanization, both maintaining the cold resistance of a cold-resistant fluorine-containing rubber and exhibiting a hardness as low as possible and an excellent fuel-low-permeability; and automobile parts of fuel syste...

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Bibliographische Detailangaben
Hauptverfasser:	NISHII HIDEMI, FUKUOKA SHOJI, KISHINE MITSURU, WASHINO KEIKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a block copolymer and a composition for peroxide vulcanization, both maintaining the cold resistance of a cold-resistant fluorine-containing rubber and exhibiting a hardness as low as possible and an excellent fuel-low-permeability; and automobile parts of fuel systems prepared by molding the composition. SOLUTION: The block copolymer only consists of: a fluorine-containing elastomer segment (A) having a composition which has either (1) the composition ratio of a vinylidene fluoride/perfluoroalkyl vinyl ether copolymer being 50-85/15-50 mol% or (2) the composition ratio of a vinylidene fluoride/tetrafluoroethylene/perfluoroalkyl vinyl ether being 45-85/1-30/14-30 mol%; and a fluorine-containing resin segment (B) melt-moldable with the fluorine-containing elastomer segment (A). The block copolymer has iodine atoms and can be vulcanized with a peroxide. COPYRIGHT: (C)2010,JPO&INPIT