Patent · US Active

Living coordinative chain transfer polymerization with dynamic counterion exchange

US9175103B2 · kind B2 · utility

0Cited by

5References

19Claims

0Family size

Assignee

UNIVERSITY OF MARYLAND, COLLEGE PARK · US

Inventors

Lawrence R. Sita · Silver Spring, US
Jia Wei · Beltsville, US
Wei Zhang · Brecksville, US

Key dates

Filing date	Jun 10, 2011
Grant date	Nov 3, 2015
Priority date	—
Expiry date	Oct 12, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2420/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Disclosed is a method of producing a polyolefin composition comprising contacting a metal alkyl and a first olefin monomer, then adding a first co-catalyst, a second co-catalyst, a pre-catalyst, and a second olefin monomer. The method allows for the production of a series of copolymers with tunable incorporation ratios of the first olefin monomer. The method also allows for the production of polyolefins of low molecular weights and narrow molecular weight distributions.

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