Patent · US Expired

Pre-polymerized catalyst components for the polymerization of olefins

US7223711B2 · kind B2 · utility

3Cited by

12References

19Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Mario Sacchetti · Ferrara, IT
Diego Brita · Ferrara, IT
Gianni Collina · Cassana, IT

Key dates

Filing date	May 7, 2001
Grant date	May 29, 2007
Priority date	—
Expiry date	Jul 16, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F110/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Catalyst components for the preparation of ethylene (co)polymers capable to produce polymers with high bulk density, to avoid the problems of formation of fines and that have a high activity are provided. Said catalyst components are characterized by comprising a non-stereospecific solid catalyst component, comprising a titanium compound and a magnesium dihalide, which is pre-polymerized with an alpha olefin CH2═CHR1 wherein R is a C1–C8 alkyl group, to such an extent that the amount of the α-olefin pre-polymer is up to 100 g per g of said solid catalyst component.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.