Patent · US Expired

Process for the preparation of polyolefins

US4769510A · kind A · utility

157Cited by

3References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Walter Kaminsky · Pinneberg, DE
Klaus Kulper · Pinneberg, DE
Maria Buschermohle · Hamburg, DE
Hartmut Luker · Hofheim, DE

Key dates

Filing date	Nov 25, 1985
Grant date	Sep 6, 1988
Priority date	—
Expiry date	Nov 25, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

In the polymerization of propylene and other higher 1-olefins, polymers which have a high degree of isotacticity and a narrow distribution of molecular weight are obtained in the presence of a catalyst system composed of a zirconium compound which is stereo-rigid and chiral and a linear or cyclic aluminoxane. In addition, the catalyst system is exceptionally active.

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