DuPont Elastomers VTR 8655/8650 Blend

Subcategory: Fluoropolymer, TS; Elastomer, TS; Thermoset

Close Analogs: This former DuPont Dow Elastomers product line is now produced by DuPont Performance Elastomers.

Material Notes:

Formulation

VTR 8655	50
VTR 8650	50
Zinc Oxide	3
N990 Carbon Black	30
Diak™ 7 (TAIC)	3
Varox® DBPH-50	2

Description: VTR-8655 is a new, 68% fluorine, peroxide-cured, Viton® polymer similar to VTR-8650 but with a significantly lower gum polymer viscosity of ~25 (ML at 121°C). VTR-8655 utilizes revolutionary new Advanced Polymer Architecture technology which includes a new peroxide cure site along with an optimized molecular weight distribution designed to deliver a polymer which:

• Is ideal for blending with VTR-8650 to reach intermediate viscosity ranges
• Cures exceptionally fast to a high state of cure
• Shows improved mold release/mold fouling properties compared to Viton® GBL-200
• Shows improved mold flow and less shear sensitivity than 65 Mooney VTR-8650
• Shows excellent physical properties with high elongation, both original and aged
• Shows similar heat, fluids, and low temperature resistance compared to Viton® GBL-200
• Shows improved water resistance/volume swell in water compared to Viton® GBL-200
• Shows excellent compression set resistance with either low or no postcure

VTR-8650 is a new, developmental 68% fluorine peroxide cured polymer similar to Viton® GBL-900 but with significantly improved processing and curing characteristics. VTR-8650 utilizes a revolutionary new Advanced Polymer Architecture technology which includes a new peroxide cure site along with an optimized molecular weight distribution designed to deliver a polymer which:

• Cures exceptionally fast to a high state of cure
• Shows improved mold release/mold fouling properties compared to Viton® GBL-900 and 200
• Shows improved mold flow, less shear sensitivity, and lower extruder die swell for a ~65 Mooney FKM
• Shows excellent physical properties with high elongation, both original and aged
• Shows similar heat, fluids, and low temperature resistance compared to Viton® GBL-900 and 200
• Shows improved water resistance/volume swell in water compared to Viton® GBL-900 and 200
• Shows excellent compression set resistance with either low or no postcure

It is recommended if mixing in an internal mixer to use at least a 70% load factor. The recommended process aid for VTR-8650 is 0.5 phr of Armeen® 18D.

Information provided by manufacturer.