| 摘要 |
A process for preparing hyperpure propylene (co)polymers comprising polymerizing the monomer(s) in liquid monomer in the presence of a catalyst obtained by reacting an Al-trialkyl compound with a solid catalyst component comprising magnesium dihalide in active form, having supported thereon a titanium chloride or chloroalcoholate, and an ether having the general formula: <CHEM> where R and R' are the same or different and are C2-18 alkyl, C3-18 cycloalkyl, C6-18 aryl, C7-18 arylalkyl or alkylaryl radicals. |
