Olefin polymerization catalyst system
US6232255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst system for the polymerization of olefins which includes a solid catalyst component and a cocatalyst. The solid catalyst component includes the contact product of silica, an alkyl magnesium-containing species, a compound having the structural formula E(YZ).sub.m X.sub.4-m, where E is an atom of an element of Group 14 of the Periodic Table of the Elements; Y is an atom of an element of Group 16 of the Periodic Table of the Elements; Z is hydrogen, hydrocarbyl or mixtures thereof; X is hydrogen, halogen, hydrocarbyl or mixtures thereof; and m is an integer of 1 to 4 and a tetravalent titanium compound. The cocatalyst includes a mixture of at least two compounds having the structural formula AlR.sub.x X.sup.1.sub.3-x, where R is the same or different and is hydrocarbyl; X.sup.1 is halogen; and x is an integer of 1 to 3 with the proviso that at least one of the compounds is defined by x being 3 and at least one of the compounds as defined by x being 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.