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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
Fully compounded with curative
Fast cycle times and scorch-free molding
Excellent adhesion to metal parts
Improved processability and resistance to mold fouling
Shorter production cycle and fewer rejects
Calcium carbonate is not required in the final compounding, eliminating hygroscopy and dispersion issues associated with the CaCO3 addition
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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