Viton™ A-HV is a gum fluoropolymer with an ultrahigh viscosity supplied in sheet form. Viton™ A-HV provides the best resistance to compression set compared to other A-type polymers.
Viton™ A-HV fluoroelastomers (FKM) are A-type gum polymers composed of hexafluoropropylene (HFP) and vinylidene fluoride (VF₂). Viton™ A-HV contains 66% fluorine content and offers the highest among all A-type polymers. Viton™ A-HV provides excellent tensile strength and compression set resistance. Viton™ A-HV can be cured with both bisphenol AF and amine-type curatives.
Physical form: Sheet
Appearance: White to tan
Odor: Negligible
Nominal viscosity, ML1 + 10 at 121°C (250°F): 100
Specific gravity: 1.82
Storage stability: Excellent
Fluorine, %: ~66
Primary Chemistry: Dipolymer of hexafluoropropylene and vinylidene fluoride
Supplied in sheet form
Can be cured using bisphenol and diamines
Typically cured with Viton™ VC-50
High tensile strength
Low compression set
Ultrahigh viscosity
Incompatibility of fluoroelastomers sheets with the production process or preference for pellets
Insufficient resistance to compression set in traditional fluoroelastomer compounds
Low viscosity of FKM materials or fluoropolymer compounds
Curing difficulties of fluoroelastomers with bisphenol or diamine curing agents
Compression molding of gaskets, O-rings, and seals
Oilfield parts, such as packers
Extreme dielectric applications, such as wires and cables
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