This invention relates to the polymerization of unsaturated hydrocarbons over Ziegler type catalysts, and more particularly, to {HEAD ~ processes} for formulating {TAIL ~ such catalysts} by sequentially mixing the various components thereof and controlling the orders of addition and the durations of mixing such catalyst components 
This invention relates to the polymerization of unsaturated hydrocarbons over Ziegler type catalysts , and more particularly , to { HEAD ~ processes } for formulating { TAIL ~ such catalysts } by sequentially mixing the various components thereof and controlling the orders of addition and the durations of mixing such catalyst components
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH