申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP0332038A2
公开(公告)日:1989-09-13
This invention relates to a class of tert-alkyl-para-phenylenediamines having alkyl groups ortho to an amine group. More particularly, the aromatic diamines are represented by the formulas:
wherein R₁, R₂ and R₃ are C₁₋₃ alkyl groups or R₂ and R₃ are combined to form a C₅₋₆ membered ring.
The above described alkylated para-phenylenediamines have been found to be well suited for use as a chain extender in forming polyurethane/urea elastomer systems and provide enhanced benefits in terms of delayed reactivity for facilitating the processing of the elastomer systems, and high tensile strength, thermal stability and tear resistance in the resulting elastomer itself.
本发明涉及一类叔烷基对苯二胺,其烷基正交于一个胺基。更具体地说,芳香族二胺由以下公式表示:
其中 R₁、R₂ 和 R₃ 是 C₁₋₃ 烷基或 R₂ 和 R₃ 结合形成一个 C₅₋₆ 成员环。
研究发现,上述烷基化对苯二胺非常适合用作形成聚氨酯/尿素弹性体体系的扩链剂,并可在延迟反应性方面提供更多益处,以促进弹性体体系的加工,并使所得弹性体本身具有较高的拉伸强度、热稳定性和抗撕裂性。