BAYFLEX® WR-20 by Covestro is a weather-resistant, two liquid component (diphenylmethane diisocyanate (MDI) prepolymer and polyether polyol) solid urethane elastomer grade. Offers rapid de-mold time, excellent integrity at demold, improved release characteristic and outstanding physical properties. It eliminates the need for post-painting or in-mold coatings. BAYFLEX® WR-20 is suitable for processing by reaction injection molding (RIM). Used in rollers, gaskets and automotive encapsulated windows.
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BAYFLEX® WR-20 properties
Mechanical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Durometer Hardness Shore A | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Elongation at Break | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Flexural Modulus | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Flexural Modulus | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Flexural Modulus | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Tear Strength | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Tensile Strength | 0.0 Visible After Login | Visible After Login | Visible After Login |
Other properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
Physical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Density | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Length Increase by Water Immersion | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Specific Gravity (Density), Isocyanate Component | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Specific Gravity (Density), Polyol Component | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Water Absorption | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Water Absorption | 0.0 Visible After Login | Visible After Login | Visible After Login |
Thermal properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Brittleness Temperature | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Flash Point, Isocyanate Component, Closed Cup | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Flash Point, Polyol Component, Closed Cup | 0.0 Visible After Login | Visible After Login | Visible After Login |
BAYFLEX® WR-20 Processing Guidelines
Injection Molding Processing Guidelines
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| De-mold Time | Visible After Login | Visible After Login | |
| Material Temperature | Visible After Login | Visible After Login | |
| Mixing Ratio, A/B, 105 index | Visible After Login | Visible After Login | |
| Mold Temperature | Visible After Login | Visible After Login | |