Process for the polymerization of .alpha.-olefins, a catalyst used in the polymerization and its preparation
US6288180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In the polymerization of C.sub.3 -C.sub.12 -.alpha.-olefins, the activity of the catalyst and the isotacticity and molecular weight of the polymer product can be adjusted and improved in a controlled manner by a new process wherein PA1 A) a catalyst system is prepared by bringing a support which comprises magnesium chloride, a derivative thereof or a reagent forming it into contact with at least titanium tetrachloride or a reagent forming it, in order to produce a titanated support; by bringing the titanated support into contact with at least a group 1, 2 or 13 metal compound which contains a C.sub.1 -C.sub.10 -alkyl and activates titanium tetrachloride to a catalytically active titanium group, in order to produce an activated support; and by bringing a substance selected from among the said support, titanated support and activated support into contact with at least one donor or a reagent forming it, in order to produce a catalyst system PA1 B) polymerization is carried out using the catalyst system by bringing it into contact with at least a C.sub.3 -C.sub.12 -.alpha.-olefin, whereupon poly-C.sub.3 -C.sub.12 -.alpha.-olefin chains are formed in the catalytically active titanium gr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.