申请人:AMERICAN CYANAMID COMPANY
公开号:EP0171536A1
公开(公告)日:1986-02-19
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 stoichiometric 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.
本发明公开了压缩永久变形小于或等于约 40% 的聚氨酯弹性体组合物。这些聚氨酯弹性体组合物由以下物质的反应产物组成:
(a) 具有末端反应性异氰酸酯基团的聚氨酯预聚物,该预聚物是聚合二元醇与对四甲基二异氰酸酯(p-TMXDI)按一定比例过量的反应产物;以及
(b) 选自以下组别的有效固化剂:二乙基甲苯二胺 (DETDA)、2,4,-双(对氨基苄基)苯胺 (BABA) 及其混合物;以及
(c) 可选地,以固化剂重量计,催化剂的重量占约 0.01%至约 2%。
这些聚氨酯弹性体可用于机器辊子和轮子等承重模制件。