Shaped products manufactured from composition consisting essentially of ethylene homopolymer
US6214960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ethylene homopolymer having a density of from about 0.956 to about 0.970 g/cm.sup.3 and a high load melt index (190.degree. 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.degree. C., at a polymerization temperature from about 55 to about 150.degree. 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/cm.sup.3 and a high load melt index of from about 5 to about 20 g/10 min. A shaped product manufactured from this composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.