C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/636, 402/641
C08F 4/64 (2006.01) C08F 4/76 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1206462
ABSTRACT An unmilled catalytic component for polymerizing olefins with high activity to yield polymers with high stereoregularity and a narrow particle size distribu- tion with a low weight percentage of small particles comprises a solid, unmilled support containing magnes- ium-halogen bonds, a transition metal halide of a metal selected from Groups IVB and VB of the periodic table, and electron donors. This catalytic component is obtained by steps com- prising: (a)contactinga.Mg(OR)2 and/or Mn(OR) 2 compound with a Ti(OR)4 compound to comprise a liquid, where R is a hydrocarbyl or halogenated hydrocarbyl moiety contain- ing 1 to 20 carbon atoms or a halogen, (b) reacting the liquid with a fluid comprising a halogenating agent and treatment with an electron donor to form a treated solid, and (c) post-treating the solid with a transition metal halide,
443439
Gowling Lafleur Henderson Llp
Stauffer Chemical Company
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