Viton™ A-361C, formerly VTR-7152, is a precompounded fluoropolymer with excellent mold flow and tear resistance. Viton™ A-361C is used when good adhesion to metal is required.
Viton™ A-361C fluoroelastomer is a fully precompounded A-type dipolymer composed of hexafluoropropylene (HFP) and vinylidene fluoride (VF₂). Part of A-family dipolymers, this grade of Viton™ contains 66% fluorine content and is recommended in the compression and injection molding of parts that require good metal adhesion. The moderate viscosity of Viton™ A-361C makes it suitable for the compression molding of complex shapes while featuring a fully precompounded material that helps reduce curative levels and promote incorporated metal adhesion. Viton™ A-361C allows for improved processing as it has an increased mold flow property, making the FKM product easier to release from the mold with less fouling.
Form: Slab
Color: 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
Intermediate viscosity level compared to Viton™ A-201C/Viton™ A-401C
Fully precompounded
Improved mold flow
Easier mold release and heat resistance
Less mold fouling
Chemical resistance
Improved demolding and hot tear
Reduced curative level
Incorporated adhesion promotor
Good metal bonding with standard primers
Adhesion and bonding issues of elastomers to metals and standard primers
High loading of curing agents and cross-linkers for proper processing of fluoroelastomer compounds
Cross-linking and curing difficulties of Viton™ gums
FKM molded products experiencing hot tear and casting defects
Compression molding of O-rings, gaskets, and rubber parts
Injection molding of elastomeric parts, such as O-rings and gaskets
Transfer molding of O-rings and gaskets
Engine crank and camshaft seals
Valve stem rubber seals
Valve cover elastomeric shaft seals
Air intake manifold gaskets
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