Full Title

Polymerisation catalysts > Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors > selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides > together with refractory metals, iron group metals, platinum group metals, manganese, rhenium or compounds thereof > Refractory metals or compounds thereof > Pretreating the metal or compound covered by group C08F4/62 before the final contacting with the metal or compound covered by group C08F4/44 > Pretreating with metals or metal-containing compounds > with silicon or compounds thereof