Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a Group 4 metal complex that incorporates a dianionic, tridentate 2-(2-aryloxy)quinoline or 2-(2-aryloxy)dihydroquinoline ligand. In one aspect, supported catalysts are prepared by first combining a boron compound having Lewis acidity with excess alumoxane to produce an activator mixture, followed by combining the activator mixture with a support and the tridentate, dianionic Group 4 metal complex. The catalysts are easy to synthesize, support, and activate, and they enable facile production of high-molecular-weight polyolefins.
本文披露了用于聚合烯烃的催化剂。该催化剂包括一个活化剂和一个第四族
金属配合物,该配合物包含一个双阴离子、三齿
配体2-(2-芳氧基)
喹啉或2-(2-芳氧基)二氢
喹啉。在一方面,通过首先将具有Lewis酸性的
硼化合物与过量的氧化铝烷混合来制备支持催化剂,然后将活化剂混合物与支持剂和三齿、双阴离子的第四族
金属配合物相结合。这些催化剂易于合成、支持和活化,并且能够轻松地生产高分子量的聚烯烃。