| 摘要 |
<p>The present invention relates to the preparation of a microporous polyurethane elastomer composition with excellent dynamic performance, consisting of a component A and a component of modified isocyanate. The component A comprises a polymer of polyol, a chain extender, a foaming agent, a catalyst A, a catalyst B, a foam stabiliser, and an anti-oxidant. The present invention has the following advantages: (1) the present invention is a microporous polyurethane elastomer material prepared by semi-prepolymerisation, and the two groups of fractional materials have similar viscosity and mixed mass ratio, a low mixture temperature; the materials are easy to mix, and the conditions for controlling the process are simple and easy to operate. (2) The microporous polyurethane elastomer material prepared from the composition provided by the present invention has a ratio of dynamic to static stiffness of <=1.35, an impact resilience of >=75%, a rate of change in size of <=20%, without damage to appearance after 3 million fatigue tests, and can be used in the preparation of high performance products such as vibration-damping blocks for high speed railways and vibration-damping elements in vehicles.</p> |
