Patent · US Expired

Atom transfer radical polymerization

US6071980A · kind A · utility

25Cited by

1References

10Claims

0Family size

Assignee

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

Inventors

Zhibin Guan · Irvine, US
Bruce E. Smart · Wilmington, US

Key dates

Filing date	Aug 18, 1998
Grant date	Jun 6, 2000
Priority date	—
Expiry date	Aug 18, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2/48
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Exposing to visible light atom transfer radical polymerizations of vinyl monomers that use transition metal compounds often results in faster polymerizations and/or the need for less transition metal compound. Disclosed is a process for the polymerization of vinyl monomers by atom transfer radical polymerization using a first compound containing a transition metal and a second compound capable of radically transferring an atom or group to said first compound, wherein the improvement comprises, irradiating with visible light with an intensity of at least about 5 mW/cm.sup.2 a liquid in which said polymerization is taking place. The polymers made are useful for molding resins and coatings.

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