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| Place of Origin: | China |
| Brand Name: | Exceedchem |
| Certification: | ISO90001:2008 |
| Model Number: | LFE4390 |
| Minimum Order Quantity: | 1mt |
|---|---|
| Price: | Contact us for latest price |
| Packaging Details: | 25KG/DRUM,240KG/DRUM |
| Delivery Time: | within two weeks after confirming the order |
| Payment Terms: | TT; LC at sight |
| Supply Ability: | 1000tons per year |
| Series: | Low Free TDI/Polyester Prepolymer | Packaging: | 25KG/DRUM,240KG/DRUM |
|---|---|---|---|
| Application: | For High-end Polyurethane Elastomer Products | Appearance: | Solid |
| Hardness: | 90 ± 2 Shore A | NCO Content: | 4.2-4.6% |
Low Free Urethane Prepolymers For Cast Elastomers LFE4390
(Replace To LF1900A)
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.
| Properties | Typical Value | |
| NCO Content, % | 4.4 ± 0.2 | |
| Appearance , 25℃ | Solid | |
| Viscosity , 90℃ , cps | 1450 | |
| Processing Conditions | Prepolymer | Moca |
| Temperature , ℃ | 90 | 115 |
| Mix ratio by weight | 100 | 13.3 |
| Pot Life , min | 8 | |
| Demold ℃/Minutes | 100/30 | |
| Post Cure, ℃/Hrs. | 100/15 | |
Typical Physical Properties
| Properties | Test Method | Units | Typical Value |
| Hardness | ASTM D 2240 | Shore A | 90 ± 2 |
| Tensile Strength | ASTM D 412 | MPa | 52.4 |
| Elongation at Break | ASTM D 412 | % | 480 |
| 100% Modulus | ASTM D 412 | MPa | 8.2 |
| 300% Modulus | ASTM D 412 | MPa | 16.3 |
| Rebound, Bayshore | ASTM D 2632 | % | 37 |
| Tear Strength | ASTM D 624 | kN/m | 112 |
| Compression Set B (70°C, 22hrs) | ASTM D 395 | % | 33 |
Storage Conditions
Store away from moisture, at temperature lower than 30°C with original sealed container.
Packing
25kg/drum or 240kg/drum
