97700 ⎘
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 technetium or compounds thereof; Pretreating the metal or compound covered by group before the final contacting with the metal or compound covered by group; Pretreating with metals or metal-containing compounds with metals or metal-containing compounds, not provided for in groups -