POLYURETHANE AND POLYURETHANE/UREA HEAT-CURED AND MOISTURE-CURED ELASTOMERS WITH IMPROVED PHYSICAL PROPERTIES

摘要

Quasi prepolymers or terminated isocyanate prepolymers are prepared from polioxipropilu00e9n diols with unsaturation less 0,02meq / G and a Molecular Weight greater than 2000 da.These provide Elastomers with improved Physical Properties, particularly Strength, Elasticity, Tear Resistance and Compression Set.Which can be prepared by Chain extension or Moisture Curing of the finished enisocianato prepolymers prepared from a polyol component that includes a polioxipropilu00e9n dIOL of high molecular weight and low unsaturation diol and a low molecular weight.The Elastomers are useful for applications such as Rollers and other applications for which these important Physical Properties.