Viton™ GLT-200S* fluoroelastomer is a 64% fluorine,  peroxide-cured, low temperature fluoroelastomer similar  to Viton™ GLT-600S, but with a significantly lower gum  polymer viscosity of ~25 (ML at 121 °C [250 °F]).  GLT-200S utilizes the latest technology from Chemours,  Advanced Polymer Architecture (APA), which includes a  novel peroxide cure site along with an optimized molecular  weight distribution.

Features 

• Cures exceptionally fast to a high state of cure 

• Is ideal for blending with Viton™ GLT-600S to reach  intermediate viscosity ranges for injection molding 

• Improved mold release/mold fouling properties  

• Improved mold flow and less shear sensitivity than  65 Mooney Viton™ GLT-600S 

• Excellent physical properties with high elongation, both  original and aged 

• Heat, fluids, and low temperature resistance  comparable to Viton™ GLT-600S • Improved water resistance/lower volume swell in water  

• Excellent compression set resistance with either low or  no post-cure 

Processing  

A load factor of 72%+ for internal mixing of GLT- 200S is recommended. The suggested process aids  for GLT-200S are 0.75 phr of Struktol® HT290, either  alone or in combination with 0.5 phr of PAT-777, or  combinations of 0.5 phr Armeen® 18D with carnauba  wax or Struktol® WS280. The use of TMAIC (trimethallyl  isocyanurate) is NOT suggested, as it causes poor  mold release and high compression set. Viton™ Curative  No. 7 (VC-7) is the suggested coagent for all GLT-200S  compounds and usually used at a 2.5 phr level or lower,  unless high modulus is needed. High levels of VC-7 can  bleed out and cause molding flaws.