Olefin polymerization catalyst containing a transesterification product of a lower alcohol and a phthalic acid ester
US6303532A · kind A · utility
6Cited by
5References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1995 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Apr 18, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In the invention a catalyst composition intended for the polymerization of olefins has been provided, which has been prepared by bringing together magnesium chloride, a lower alcohol, a titanium compound and an ester of phthalic acid. The procatalyst composition is active and stereospecific and it simultaneously has a titanium and phthalic acid content as low as possible. These good properties have been achieved by carrying out a transesterification between the lower alcohol and the ester of the phthalic acid, whereby the alkoxy group of the phthalic acid comprises at least five carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.