Studies of ziegler-type catalysts for the polymerization of ethylene and propylene—I a highly active catalyst for the polymerization of ethylene

The reaction product of an incompletely desolvated ethereal Grignard reagent and TiCl₄, when employed with a trialkylaluminium cocatalyst, possesses catalytic activity for the polymerization of ethylene, of some two orders of magnitude (on the basis of Ti) greater than that of traditional TiCl₃ catalysts. The yield of polyethylene increases linearly with increasing ⁱBu₃Al concentration, when a constant amount of Et,Zn is also present.