Patent · US Active

Polymerization of olefins

US7977268B2 · kind B2 · utility

20Cited by

20References

7Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Joel David Citron · Wilmington, US
Lin Wang · Hockessin, US

Key dates

Filing date	Aug 6, 2010
Grant date	Jul 12, 2011
Priority date	—
Expiry date	Aug 6, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2410/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films.

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