This invention pertains to the manufacture of polyurethane-urea elastomers formed by reacting a prepolymer of an organic polyisocyanate and a compound having at least two Zerewitenoff active hydrogen atoms with a chain extender comprising t-butylbenzenediamine. The utilization of t-butylbenzenediamine as an aromatic diamine chain extender imparts flexibility in the handling of reactable compositions due to an increase in pot life and imparts excellent tensile modulus to the resulting polymer.
本发明涉及有机多
异氰酸酯预聚物和至少有两个 Zerewitenoff 活性氢原子的化合物与由 t-丁基
苯二胺组成的扩链剂反应而形成的聚
氨酯-
尿素弹性体的制造。 使用 t-丁基
苯二胺作为芳香族二胺扩链剂可提高反应组合物的处理灵活性,从而延长罐装寿命,并使生成的聚合物具有优异的拉伸模量。