T405A Medium Mooney Bisphenol Terpolymer Precompound, Hardness 76
Request a Quote
Data Sheet
- Material Type: Medium viscosity bisphenol-cured incorporated fluoroelastomer terpolymer
- Features: Excellent mold-release properties with low compression set, suitable for compression molding
- Applications: O-rings, gaskets, and other molding parts
- Working Temperature Range: Maximum 230℃ and minimum -13℃
- Lab Testing Curing Condition:
Primary Cure: 177℃ × 6min
Post Cure: 230℃ × 16h
Original Properties
| Property | Unit | Test Method | Typical Value |
| Fluorine Content | % | -- | 68 |
| Specific Gravity | g/cm³ | ASTM D297 | 1.82 |
| Color | -- | -- | White |
| Solubility | -- | -- | Ketones and esters |
| Mooney Viscosity ML (1 10@121℃) | Mu | ASTM D1646 | 40 |
Test Formulation
| Formulation | Phr | Grade |
| T405A | 100 | T405A |
| MgO | 3 | MgO 150# |
| Ca(OH)2 | 6 | NICC 5000 |
| N990/MT N990 | 30 | Thermax® N990 |
Rheological Properties
| Property | Unit | Typical Value |
| ML, Minimum Torque | N.M | 0.20 |
| MH, Maximum Torque | N.M | 1.90 |
| Scorch Time (ts₂) | -- | 1’20 |
| Cure Time (tc90) | -- | 2’20 |
Mechanical Properties
| Property | Unit | Test Method | Typical Value |
| Hardness (Shore A) | pt | ASTM D2240 | 76 |
| Tensile Strength | MPa | ASTM D412 | 15.3 |
| Elongation at Break | % | ASTM D412 | 240 |
Heating Aging, 70 hrs @250℃
| Property | Unit | Test Method | Typical Value |
| Change in Hardness | pt | ASTM D573 | 1 |
| Change in Tensile Strength | % | ASTM D573 | 10 |
| Change in Elongation | % | ASTM D573 | -12 |
Fuel C, 70 hrs @23℃
| Property | Unit | Test Method | Typical Value |
| Change in Hardness | pt | ASTM D471 | -2 |
| Change in Tensile Strength | % | ASTM D471 | -7 |
| Change in Elongation | % | ASTM D471 | 3 |
| Change in Volume | % | ASTM D471 | 4 |
Compression Set, Aged 70 hrs @200℃
| Property | Unit | Test Method | Typical Value |
| 6 mm Buttons | % | ASTM D395 | 26 |
Manufacturing Process