Low Free TDI / Polyester Prepolymer LFE4390 Equivalent To LF1900A
Low Free TDI/Polyester Prepolymer LFE4390 Equivalent to LF1900A
1. Description
LFE4390 is a TDI-polyester-based product with a very low free TDI content (typically less than 0.1%). This results in a non-toxic polyurethane system and reduces processing hazards. LFE4390 offers lower viscosity, longer pot life, and faster demolding. Its compatibility with a range of curatives enables high productivity. The resulting elastomer exhibits good abrasion resistance, compression set, tear strength, and dynamic properties.
2. Product Specification
| Properties | Typical Value |
| NCO Content (%) | 4.4 ± 0.2 |
| Hardness Shore A | 90±2 |
| Viscosity, 90℃,cps | 1450 |
| Appearance, 25℃ | Solid |
| Tensile Strength, MPa | 52.4 |
| Elongation at Break, % | 480 |
| Tear Strength, kN/m | 112 |
| Rebound, Bayshore, % | 37 |
3. Storage
Store away from moisture, at temperature lower than 30°C with original sealed container.
4. Package
25kg/drum or 240kg/drum.
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