| 摘要 |
<p>P-TMXDI POLYURETHANE ELASTOMERS WITH GOOD COMPRESSION SET PROPERTIES Polyurethane elastomer compositions, having a compression set less than or equal to about 40% are disclosed. These polyurethane elastomer compositions comprise the reaction product of: (a) A polyurethane prepolymer having terminally reactive isocyanate groups and formed as a reaction product of polymeric diol with a stoechiometric excess of p-tetramethylxylene diisocyanate (p-TMXDI); with (b) A curatively effective amount of a curative selected from the group consisting of: diethyltoluenediamine (DETDA), 2,4-bis(p-aminobenzyl)-aniline (BABA), and mixtures thereof; and (c) Optionally, from about 0.01% to about 2% by weight of catalyst, based on the weight of curative These polyurethane elastomers are used in molded articles which are to be used under load as in machine rolls and wheels.</p> |
