Viton™ A-331C, formerly VTR-6676, is a precompounded fluoropolymer with excellent mold flow that provides high elongation and tear resistance. Viton™ A-331C is designed for the injection and compression molding of complex shapes that require maximum hot tear.
Viton™ A-331C fluoroelastomer is a fully precompounded A-type dipolymer composed of hexafluoropropylene (HFP) and vinylidene fluoride (VF₂). Viton™ A-331C contains 66% fluorine content and offers excellent hot -tear resistance and low viscosity. The low viscosity of Viton™ A-331C makes it suitable for compression molding.
Physical form: Sheet
Appearance: Off-white
Odor: None
Nominal viscosity, ML1 + 10 at 121 °C (250 °F): 30
Specific gravity: 1.82
Storage stability: Excellent
Solubility: Low–molecular weight esters and ketones
Primary Chemistry: Dipolymer of hexafluoropropylene and vinylidene fluoride plus cure chemicals
Fully precompounded
Improved mold flow
Easier mold release
Less mold fouling
Fast cure rate
Reduced curative level
Incorporated process aid
Excellent compression set resistance
High elongation and tear resistance
Difficulties and production rejects in the injection and compression molding processes of complex shapes that require maximum hot tear
Compatibility of fluoroelastomers with compression molding processes
Low tear resistance and elongation of traditional rubber and elastomeric compounds
Transfer and injection molding applications
Extrusion molding applications
O-rings, gaskets, and elastomeric seals
Hoses, tubes, and rubber parts
Engine crank and camshaft seals
Valve stem rubber seals
Valve cover elastomeric seals
Air intake manifold gasket
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