公开(公告)号：USRE33683E

公开(公告)日：1991-09-03

申请号：US357249

申请日：1989-05-26

申请人： Louanne M. Allen ,  Robert O. Hagerty ,  Richard O. Mohring

发明人： Louanne M. Allen ,  Robert O. Hagerty ,  Richard O. Mohring

IPC分类号： C08F210/02

CPC分类号： C08F210/02

摘要： A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and triisobutylaluminum.