| 摘要 |
An ethylene homopolymer having a density of from about 0.956 to about 0.970 g/cm3 and a high load melt index (190° C. and 21.6 kg) of from about 7 to about 21 g/10 min. A continuous polymerization process for the production of the ethylene homopolymer, in the presence of a diluent chosen from the group consisting essentially of n-butane, n-hexane, n-heptane, isobutane, isopentane, isooctane, 2,2-dimethylpropane, cyclopentane, cyclohexane and their mixtures, wherein ethylene is brought into contact with a chromium oxide catalyst deposited on an inorganic support containing from about 0.1 to about 5 wt % chromium and activated at a temperature from about 600 to about 900° C., at a polymerization temperature from about 55 to about 150° C., the ethylene concentration in the diluent being from about 1 to about 10 mol %. A composition consisting essentially of the ethylene homopolymer, the composition having a density of from about 0.956 to about 0.970 g/cm3 and a high load melt index of from about 5 to about 20 g/10 min. A shaped product manufactured from this composition.
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