Components and catalysts for the polymerization of olefins
US6281301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1998 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jun 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a solid catalyst component for the polymerization of olefins CH.sub.2.dbd.CHR in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising a titanium compound, having at least a Ti-halogen bond and an electron donor compound supported on a Mg halide, in which said electron donor compound is selected from esters of malonic acids of formula (I): ##STR1## wherein R.sub.1 is a C.sub.1 -C.sub.20 linear or branched alkyl, C.sub.3 -C.sub.20 alkenyl, C.sub.3 -C.sub.20 cycloalkyl, C.sub.6 -C.sub.20 aryl, arylalkyl or alkylaryl group; R.sub.2 is a C.sub.1 -C.sub.20 linear alkyl, C.sub.3 -C.sub.20 linear alkenyl, C.sub.6 -C.sub.20 aryl, arylalkyl or alkylaryl group; R.sub.3 and R.sub.4 are independently selected from the group consisting of C.sub.1 -C.sub.3 alky, cyclopropyl, with the proviso that when R.sub.1 is C.sub.1 -C.sub.4 linear or branched alkyl or alkenyl, R.sub.2 is different from R.sub.1. Said catalyst components when used in the polymerization of olefins, and in particular of propylene, are capable to give high yields and polymers having high insolubility in xylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.