DuPont Mobility and Materials VTR 8505 Peroxide Cured Fluoroelastomer (FKM) Formulation

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DuPont Mobility and Materials VTR 8505 Peroxide Cured Fluoroelastomer (FKM) Formulation (discontinued **)
Categories:	Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)
Material Notes:	VTR-8505 is a 64% fluorine, peroxide-cured, low-temperature Viton® fluoroelastomer similar to VTR-8500 but with a significantly lower gum polymer viscosity of ~25 (ML at 121°C). VTR-8505 utilizes 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-8500 to reach intermediate viscosity ranges Cures exceptionally fast to a high state of cure Shows improved mold release/mold fouling properties compared to Viton® GLT and GLT-305 Shows improved mold flow and less shear sensitivity than 65 Mooney VTR-8500 Shows excellent physical properties with high elongation, both original and aged Shows similar heat, fluids, and low temperature resistance compared to Viton® GLT and GLT-305 Shows improved water resistance/volume swell in water compared to Viton® GLT and GLT-305 Shows excellent compression set resistance with either low or no postcure Information provided by manufacturer.
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Physical Properties	Metric	English	Comments

Mooney Viscosity	20 @Temperature 121 °C	20 @Temperature 250 °F	ML-10 (gum)-Akron data

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	68	68	Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Tensile Strength, Ultimate	16.2 MPa	2350 psi	Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Tensile Strength, Yield	0.700 MPa	102 psi	10% Modulus, Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Elongation at Break	254 %	254 %	Cured 7 min at 177°C and Post Cured 2 hr at 232°C
100% Modulus	3.70 MPa @Strain 100 %	537 psi @Strain 100 %	Cured 7 min at 177°C and Post Cured 2 hr at 232°C
Compression Set	20 % @Temperature 200 °C	20 % @Temperature 392 °F	Method B, O-rings 70 hr at 200°C (Post Cured 2 hr at 232°C)

Thermal Properties	Metric	English	Comments
Glass Transition Temp, Tg	-32.8 °C	-27.0 °F	DSC, modulated

Component Elements Properties	Metric	English	Comments
Fluorine, F	64 %	64 %

Descriptive Properties
Formulation as Tested	100		Viton® 8505
	3		Zinc Oxide
	3		Diak™ 7
	3		Varox® DBPH-50
	30		N990 Carbon Black

**
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PDVDA46 / 34015

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