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Transition And Organic Metals Composition Catalysts For Addition Polymerization
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Abstract
A high activity polyethylene catalyst for polymerization of ethylene and a-olefine copolymer having 3 to 10 carbon toms, including solid supported catalyst pre drive and the auxiliary catalyst, including the pre drive: (a) silicone oxide, the silicone oxide having per g 0.4-0.9 mol of OH radical; (b) RmMgR^n, where R and R^ of alkyl of 4 to 10 carbon atoms and m + n the value of manganesium, the RmMgR^n to provide Mg:OH mol at the ratio of 1.0 to 1.8 in amount; (c) tetraalkyl silica acid ester, for provision of tetraalkyl silica acid ester; Mg mol ratio at 0.50 to 0.80, where the alkyl has 2 to 6 carbon atoms; (d) titanium tetrachloride, in amount thus to provide Ti:Mg mol ratio at 0.7 to 1.4, and the auxiliary catalyst being methyl aluminum chloride.