C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
252/109, 402/645
C07F 7/28 (2006.01) B01J 31/38 (2006.01) C08F 4/02 (2006.01) C08F 4/16 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1101432
ABSTRACT OF THE DISCLOSURE There are disclosed new solid catalyst-forming components for use in preparing catalyst for the stereoregular polymerization of alpha-olefins containing at least 3 carbon atoms, mixtures of alpha-olefins with one another and/or with ethylene, said components being obtained by reacting (a) at least one hydrocarbon-soluble halogenated Ti compound; (b) a product comprising a Mg dihalide obtained by decomposition of an adduct of at least a Mg dihalide and an electron-donor compound present in the adduct in an amount of at least 0.5 mole per mole of Mg dihalide, the decomposition product being characterized in that, in its X-rays powder spectrum, instead of the diffraction line of maximum intensity which appears in the X-rays powder spectrum of the normal Mg dihalide, a halo appears where intensity maximum is shifted with respect to said line, and (c) an electron-donor compound which does not contain active hydrogen atoms. The electron-donor compound (c) can be reacted with (a) or combined with (b) before the reaction of (a) and (b). Methods for preparing the new catalyst-forming com- ponents, catalysts obtained therefrom, and use of the catalysts for the production of crystalline homo- and co-polymers of the alpha-olefins are also disclosed.
284188
Albizzati Enrico
Giannini Umberto
Parodi Sandro
Macrae & Co.
Mitsui Petrochemical Industries Ltd.
Montedison S.p.a.
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