The present disclosure relates to bis(aryl phenolate) Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the bis(aryl phenolate) Lewis base catalysts are stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
本公开涉及双(芳基
苯酚)路易斯碱催化剂。本公开的催化剂、催化剂体系和工艺可以提供高温
乙烯聚合、
丙烯聚合或共聚合,因为双(芳基
苯酚)路易斯碱催化剂在高聚合温度下是稳定的,并且在高聚合温度下具有良好的活性。与传统催化剂相比,具有良好活性的稳定催化剂可形成具有高分子量的聚合物,并能在给定反应器中制造更多数量的聚合物。因此,本公开的催化剂具有很高的活性,能够在反应器高温下运行,同时生产出分子量可控的聚合物,或具有很强的等活性。