C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
252/105, 402/645
C08F 4/52 (2006.01) C08F 4/02 (2006.01) C08F 10/00 (2006.01) C08F 10/06 (2006.01)
Patent
CA 1083561
ABSTRACT OF THE DISCLOSURE New highly active and highly stereospecific catalysts for the polymerization of alpha-olefins are disclosed, the starting components of which are (a) an organometallic-compound of Al free from halogen atoms bound directly to the Al atom; (b) an electron-donor compound (such as a Lewis base) in an amount such that 15% to 100% of the organo- metallic Al compound (a) is combined with the electron-donor compound; and (c) a solid component comprising, at least on the surface, the reaction product of a halogenated Hg compound with a tetravalent Ti compound and with an electron-donor compound, the molar ratio electron-donor compound/Ti being higher than 0.2, and the molar ratio halogen atoms/Ti being higher than 4. Processes for polymerizing the alpha-olefins and mixtures thereof with ethylene in contact with the new catalysts are also disclosed.
262065
Barbe Pier C.
Kashiwa Norio
Luciani Luciano
Toyota Akinori
Macrae & Co.
Mitsui Petrochemical Industries Ltd.
Montedison S.p.a.
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