DuPont Elastomers Viton® B-202 Formulation

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

Viton® B-202	100
MT Black (N-990)	30
Calcium Hydroxide	6
High-Activity MgO	3
Viton® Curative No. 50	2.5
Viton® Curative No. 20	0.5

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 processability and/or improve flow.

Information provided by manufacturer.