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Viton™ B-435C is a pre-compounded fluoropolymer designed for applications requiring improved bonding to metal inserts is required.
Viton™ B-435C is a fully precompounded terpolymer composed of hexafluoropropylene (HFP), vinylidene fluoride (VF₂), and tetrafluoroethylene (TFE). Viton™ B-435C is a fluoropolymer with 68.5% fluorine content, allowing excellent heat and fluid resistance. This fluoroelastomer precompound has a nominal Mooney viscosity (ML 1+10 at 121 °C [250 °F]) of 40. Viton™ B-435C provides a large processing window with an excellent mold release and low mold fouling.
Viton™ B-435C is featured with a proprietary cure system that offers improved processing over other B typeB-type polymers. It offers a broad processing window, improved bonding to metal substrates, and enhanced resistance to mold fouling.
Form: Slab
Color: Off-white
Odor: None
Nominal viscosity, ML1 + 10 at 121 °C (250 °F): 40
Specific gravity: 1.85
Fluorine percent: ~67%
Storage stability: Excellent
Primary Chemistry: Terpolymer of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene with cure chemicals
Adhesion and bonding issues of terpolymers and elastomers to metals inserts High rejects and long production cycles of fluoroelastomer compounds Hygroscopy and dispersion issues with the use of calcium carbonates
Crank and shaft seals Valve stem rubbers Metal-bonded elastomeric components Injection and compression molding of metal-bonded parts Valve cover and fuel sender seals Gaskets, O-rings, and rubber membranes Fuel duct expansion joints
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