Method for polymerization of an .alpha.-olefin
US6066702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1998 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | May 7, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for polymerization or copolymerization of .alpha.-olefin, characterized in that the polymerization is performed using a solid complex titanium catalyst comprising magnesium, a halogen-containing titanium compound, and internal electron donors; organometallic compounds of metals belonging to Groups I and III on the periodic table of elements; and, as external electron donors, a mixture of three or more kinds of organic silicon compounds, from which homopolyolefins having MFR less than 5, MFR in the range from 5 to 20, and MFR greater than 20 are polymerized under the same polymerization conditions. By use of the present invention it is possible to produce an olefin polymer with high stereoregularity, broad molecular weight distribution, and good fluidity, at high rates of yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.