| 摘要 |
<p>A process for the preparation of polyolefins, polydienes and copolymers thereof by polymerization in solvents, liquid monomers" or in the gaseous phase at a temperature between -20°C and 150°C using magnesium hydride, a halogen-containing transition metal compound of Group IV and an aluminium alkyl compound, characterized in that the polymerizatioh is carried out in the presence of a catalyst system consists of
<UnorderedLists id="ula01" listStyle="none"><ListItem>a) a magnesium compound having the general formula M<Sup>g</Sup>Hx wherein x is a number between 1 and 2, and more specifically 2;</ListItem><ListItem>b) a compound of a transition metal of Group IV having the general formula</ListItem><ListItem>MeHal<Sub>4</Sub> wherein Me is a transition metal, more specifically titanium, and Hal is a halogen, more specifically chlorine; and</ListItem><ListItem>c) an aluminium alkyl compound having the general formula AIR<Sub>n</Sub>Hal<Sub>(3-n)</Sub> wherein R is a C<Sub>1</Sub>-C<Sub>6</Sub> alkyl residue, more specifically ethyl, Hal is a halogen, more specifically chlorine, and n is a number of from 1 to 3, and preferably 3.</ListItem></UnorderedLists></p> |
