| 摘要 |
There are disclosed new catalyst-forming components obtained by reacting at least the following substances: (a) a halogenated Ti compound containing at least one Ti-halogen bond; (b1) a support an essential constituent of which is a mixture of an oxygenated Mg compound with an adduct between a Mg dihalide and at least one electron-donor compound and/or with the product of de composition of said adduct containing Mg dihalide; and/or (b2) the product obtained by treating an oxygenated Mg compound with an electron-donor compound. Also disclosed are catalysts prepared from said new catalyst-forming components, as is use of the catalysts in the polymerization of olefins, more particularly olefins CH2=CHR in which R is an alkyl or aryl radical having 1-8 carbon atoms, of mixtures of said olefins and of mixtures thereof with ethylene. |
