| 摘要 |
This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by contacting the at least one olefinic compound with a polymerisation catalyst. The catalyst comprises the combination of a source of a Group IV to VI transition metal; and a ligating compound of the formula <?in-line-formulae description="In-line Formulae" end="lead"?>(R<SUP>1</SUP>)<SUB>m</SUB>X<SUP>1</SUP>(Y)X<SUP>2</SUP>(R<SUP>2</SUP>)<SUB>n</SUB>. <?in-line-formulae description="In-line Formulae" end="tail"?> The process is characterised therein that when R<SUP>1 </SUP>and R<SUP>2 </SUP>are independently a hydrocarbyl group or a heterohydrocarbyl group which contains at least one non-polar substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 70° C.; and where R<SUP>1 </SUP>and R<SUP>2 </SUP>are independently a hydrocarbyl group or a heterohydrocarbyl group which contains no substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 90° C.
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