| 摘要 |
<p>A thermoplastic polyurethane comprising a tetrahydrofuran based polyether diol intermediate chain extended with selective types of diols has good water vapor transmission but is resistant to liquid water through put, has good dimensional stability, good softness and elasticity, good tensile set and is non blocking. The thermoplastic polyurethane can be made by either a one shot process as in an extruder or by a prepolymer route and can be formed into a monolithic sheet or film for such uses as a roofing membrane, house wrapping, tubing, fiber, wound dressing, and the like.</p> |
