Viton™ Precompounds are cured fluoroelastomers ready for the molding processes. The ready-to-use products eliminate the difficulty associated with the dispersion of a curative. Viton™ Precompounds are most suitable for molders with limited compounding capabilities.
Viton Precompounds are classified as A, B, and F types based on the amount of fluorine in the polymer and the monomer composition. Higher levels of fluorine increase their resistance to solvents and other chemicals but reduce their low-temperature flexibility. Depending on the application, a precise selection of the right pre-compound gives the overall best properties of the final vulcanizate.
Problems Solved
Processing difficulties of Viton or Fluoroelastomer gums in molding facilities with limited curating capabilities Elastomers ability to withstand extreme temperatures while retaining its mechanical properties Elastomers limited resistance to oils and chemicals at elevated temperatures Drop in the elastomers mechanical properties at low and sub-zero temperatures Degradation of non-fluorinated elastomers when exposed to oils, fuels, and acids High permeability in elastomeric compounds for use in transportation fuel applications Dissolution of rubbers by aliphatic and aromatic hydrocarbons Breakdown and degradation of polymers when exposed to atmospheric conditions Low resistance of traditional elastomers to burning and poor electrical properties Long lead time and supply issues of FKM and fluorinated elastomers
Viton™ A-331C, formerly called VTR-6676, is a precompounded fluoropolymer with excellent mold flow that provides high tear elongation and resistance. Viton™ A-331C is designed for the injection and compression molding of complex shapes that require maximum hot tear.
Viton™ A-201C, formerly called VTR-6402, is a precompounded fluoropolymer that offers a fast cure rate, excellent rheology and mold release in injection molding applications. Viton™ A-201C is designed for the injection molding of sealing devices.
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