申请人:THE DOW CHEMICAL COMPANY
公开号:EP0245864A2
公开(公告)日:1987-11-19
Polyurethane-polyurea polymers are disclosed that are derived from the reaction injection molding of organic polyisocyanates, optional high molecular weight active hydrogen containing compounds and extender mixtures comprising (i) aromatic diamines wherein at least one of the positions ortho to each amine group is substituted by a lower alkyl group and (ii) bis(hydroxyalkyl) cycloalkanes. The improved polymers have excellent resistance to high temperature conditions. Also disclosed are the blends of both the extender mixtures and the latter with the optional high molecular weight active hydrogen containing compounds which are particularly useful for the preparation of the above polymers.
本发明公开了聚氨酯-聚脲聚合物,该聚合物由有机多异氰酸酯、任选的高分子量活性含氢化合物和由(i)芳香族二胺(其中每个胺基的至少一个正交位置被低级烷基取代)和(ii)双(羟基烷基)环烷烃组成的扩展剂混合物反应注塑而成。 改进后的聚合物具有优异的耐高温性能。 本发明还公开了扩展剂混合物和扩展剂混合物与任选的高分子量活性含氢化合物的混合物,这些混合物对制备上述聚合物特别有用。