Viton™ A-401C, formerly VTR-6600, is a precompounded fluoropolymer that provides superior resistance to compression set and improved rheology at high shear rates.
Viton™ A-401C fluoroelastomer (FKM) is a fully precompounded A-family dipolymer composed of hexafluoropropylene (HFP) and vinylidene fluoride (VF₂).
Viton™ A-401C contains 66% fluorine content and offers excellent processing and rheology characteristics. Viton™ A-401C is designed to meet the fluoroelastomer specifications of Mil-R-83248B, AMS 7276D, and AMS 7259A
Physical Form: Slab
Appearance: Off-white
Odor: None
Nominal Viscosity, ML1 + 10 at 121 °C (250 °F): 42
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 with O-ring curative level
Improved compression molding
Excellent compression set resistance
Easier mold release
Less mold fouling
Improved cure rate and heat resistance
Strong chemical resistance
Low processability and compatibility of fluoroelastomer compounds with compression molding processes
Low resistance of rubbers and elastomers to high compression
Flow and rheology control issues of traditional fluoroelastomers at high shear rates
Difficulty extruding fluoroelastomer materials
Compression and injection molding applications of rubber parts, such as O-rings
Extruded cord, seals, and profiles
Engine crank and camshaft seals
Valve stem rubber seals
Valve cover elastomeric seals
Air intake manifold gaskets
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