Low free polyurethane pre polymer has excellent comprehensive properties. It wide hardness, good mechanical properties, abrasion resistance better (wear-resisting is 10 times higher than that of iron and steel), and small heat, reaction gentle; better low temperature performance, environmental protection, no smell. Especially suitable for wear parts, rubber rollers, bushings and other dynamic seal.
The company is to PTMG+TDI low free polyurethane prepolymer, the free value is less than 0.1%.
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| NCO(%)：6.3 | Post curing（h/℃）:24/110 |
| Number of pre polymer：100 | Impact elasticity（%）：35 |
| Chain extension agent：0.95 | hardness（邵A）：96 |
| Mixing temperature（℃）：80/120 | Elongation at break（%）：340 |
| Gel time（min）：9 | tensile strength（MPa）：46 |
| Mixing time（min）：1 | Tensile deformation（%）：4 |
| Curing time（min/110℃）：30 | tear strength（KN/m）：120 |
