| 摘要 |
<p>Microcellular elastomers and a process for making them are disclosed. The process comprises reacting a resin component ('B' side) with an isocyanate-terminated prepolymer ('A' side). Pre-reacting the right proportion of chain extender into an 'A' side that also includes a high-primary, low-unsaturation polyol is the key to making low-density (less than 0.5 g/cm3) microcellular elastomers while avoiding problems with poor processing or inferior physical properties. The process is easy to practice, and provides lighter, high-quality polyurethane products, including protective sports equipment, arm rests or steering wheels for the auto industry, and midsoles or shoe soles for footwear.</p> |
