Processes for {HEAD ~ the formulation} of {TAIL ~ Ziegler type catalysts} from a transition metal component, an electron donor and a co catalyst which are sequentially mixed together 
Processes for { HEAD ~ the formulation } of { TAIL ~ Ziegler type catalysts } from a transition metal component , an electron donor and a co catalyst which are sequentially mixed together
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH