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Viton® B-202

Fluoroelastomer

Supplied by DuPont Performance Elastomers

The technical datasheet with complete property values for Viton® B-202 is available to members of the Prospector Plastics Database.
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Product Description
Viton® B-202* is a low viscosity, B-type gum polymer that demonstrates improved processing and rheology when compared with existing fluoroelastomers.

Viton B-202 is designed to be cured with either Viton Curative #30 or Viton Curative #50. When using Viton Curative #30, use Viton Curative #20 in a ratio of about 1.8 Viton Curative #30 to Viton Curative #20. When using Viton Curative #50, use 0.3-0.5 phr of Viton Curative #20 to ensure a fast cure rate. Note that Viton Curative #20 can be difficult to mix into low viscosity stocks, such as those based on Viton B-202, and careful attention needs to be paid to mixing procedures.

Compared with other B-family terpolymers, Viton B-202 provides:
-Low viscosity
-Improved processing
-Increased mold flow
-Excellent mold release

Applications
-Transfer and injection molding of complex shapes
-Extrusions (e.g., fuel hose and tubing)
-Solution coatings of fabrics, tanks or chemical containers

Viton B-202 can be blended with other Viton types to modify viscosity, enhance processibility and/or improve flow.
General  
Material Status 
  • Commercial: Active
Availability 
  • Europe
  • North America
  
Features 
  • Good Mold Release
  • Low Viscosity
  
Uses 
  • Gaskets
  • Metal Bonding
  • Seals
Appearance 
  • Grey
Forms 
  • Sheet
Processing Method 
  • Coating
Physical
Nominal Value
Unit
Test Method
Specific Gravity
 
 ASTM D792
Mooney Viscosity
MU
 ASTM D1646
Elastomers
Nominal Value
Unit
Test Method
Tensile Stress (100% Strain)
psi
 ASTM D412
Tensile Strength (Break)
psi
 ASTM D412
Tensile Elongation (Break)
%
 ASTM D412
Compression Set
      
302°F, 70.0 hr
%
 ASTM D395B
392°F, 70.0 hr
%
 ASTM D395
392°F, 168 hr
%
 ASTM D395B
Hardness
Nominal Value
Unit
Test Method
Durometer Hardness (Shore A)
 
 ASTM D2240
Aging
Nominal Value
Unit
Test Method
Change in Tensile Strength in Air
     ASTM D573
392°F, 168 hr
%
  
100% Strain, 392°F, 168 hr
%
  
450°F, 24 hr
%
  
100% Strain, 450°F, 24 hr
%
  
482°F, 168 hr
%
  
100% Strain, 482°F, 168 hr
%
  
Change in Ultimate Elongation in Air
     ASTM D573
392°F, 168 hr
%
  
450°F, 24 hr
%
  
482°F, 168 hr
%
  
Change in Durometer Hardness in Air
     ASTM D573
Shore A, 392°F, 168 hr
 
  
Shore A, 450°F, 4 hr
 
  
Shore A, 482°F, 168 hr
 
  
Change in Tensile Strength
     ASTM D471
302°F, 168 hr, in ASTM 105 Oil
%
  
100% Strain, 302°F, 168 hr, in ASTM 105 Oil
%
  
392°F, 70 hr, in Stauffer 7700 Fluid
%
  
100% Strain, 392°F, 70 hr, in Stauffer 7700 Fluid
%
  
Change in Ultimate Elongation
     ASTM D471
302°F, 168 hr, in ASTM 105 Oil
%
  
392°F, 70 hr, in Stauffer 7700 Fluid
%
  
Change in Durometer Hardness
     ASTM D471
Shore A, 302°F, 168 hr, in ASTM 105 Oil
 
  
Shore A, 392°F, 70 hr, in Stauffer 7700 Fluid
 
  
Change in Volume
     ASTM D471
73°F, 70 hr, in Methanol
%
  
73°F, 70 hr, in Reference Fuel C
%
  
302°F, 70 hr, in ASTM 105 Oil
%
  
392°F, 70 hr, in Stauffer 7700 Fluid
%
  
Additional Information
Nominal Viscosity, ML 1 + 10, 121°C: 25
Polymer Fluorine Content: 68.5%
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: Viton® B-202, Viton B202, Viton® , Viton, VitonB202, B-202, B202, B:202, B/202, B+202, B_202, B 202, Fluoroelastomer, Fluorelastomer, Fluoropolymer, DuPont Elastomers, 202B
Features
Features may also be described by the following terms: Good Mold Release, Easy Release, Good Demolding, Low Viscosity.
Uses
Uses may also be described by the following terms: Metal Bonding, Gaskets, Gasketing.
Notes
1Typical properties: these are not to be construed as specifications.
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.