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Viton is a brand of synthetic rubber and fluoropolymer elastomer commonly used in O-rings, chemical-resistant gloves, and other molded or extruded goods. The name is a registered trademark of DuPont Performance Elastomers L.L.C.. Viton fluoroelastomers are categorized under the ASTM D1418 and ISO 1629 designation of FKM. This class of elastomers is a family comprising copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2), terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF) and hexafluoropropylene (HFP) as well as perfluoromethylvinylether (PMVE) containing specialties. The fluorine content of the most common Viton grades varies between 66 and 70%. == Varieties == There are four families of viton polymers: # A (Dipolymers of VF2/HFP): General purpose sealing. Automotive, Aerospace fuels & lubricants. Nominal polymer fluorine content: 66%. # B (Terpolymers of VF2/HFP/TFE): Chemical Process plant, Power Utility Seals & Gaskets. Nominal polymer fluorine content: 68%. # F (Terpolymers of VF2/HFP/TFE): Oxygenated Automotive fuels. Concentrated aqueous inorganic acids, water, steam. Nominal polymer fluorine content: 70%. # Specialty types include GLT, GBLT, GFLT & Viton Extreme (Copolymers of TFE/Propylene and Ethylene/TFE/PMVE): Automotive, Oil Exploration, Special Sealing & Ultra Harsh 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Viton」の詳細全文を読む スポンサード リンク
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