Technical data sheet for DuPont Viton A-Type fluoroelastomers (A-35, A, A-HV) covering properties, handling, curing and applications.
The Viton A‑Type fluoroelastomers are vinylidene fluoride/hexafluoropropylene copolymers offered in three viscosity grades (A‑35, A, A‑HV). They are suited for solution coatings, roll covers, gaskets, O‑rings and general molded goods, with each grade providing a different balance of processing ease and mechanical performance.\n\nHandling precautions emphasize ventilation and avoidance of inhaling vapors, especially above 200 °C where hydrogen fluoride may be released. The polymers can be cured with Viton Curative Masterbatches (Nos. 20, 30, 40) or Diak™ curing agents (Nos. 1, 3), and detailed compounding guidelines are provided for acid acceptors, fillers and processing aids.
| Mooney Viscosity (ML 1+10) at 100 °C | 32–42 (A‑35), 59–71 (A), 90–110 (A‑HV) |
|---|---|
| Specific Gravity | 1.82 |
| Color (sheet) | Off white |
| Odor | None |
| Storage Stability | Excellent |
| Tensile Strength (Press Cure, 177 °C) | 2.8 MPa (A‑35), 3.2 MPa (A), 4.8 MPa (A‑HV) |
| Hardness (durometer A) | 76 (A‑35), 76 (A), 75 (A‑HV) |
Viton A‑35 is used in solvent‑based coatings, extrusions, high‑durometer (highly filled) stocks, and viscosity modification of other Viton grades.