Patent · US Expired

Perfluoropolyether primary bromides and iodides

US6653511B2 · kind B2 · utility

11Cited by

8References

12Claims

0Family size

Assignee

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

Inventors

Jon Lee Howell · Bear, US
Erik William Perez · Middletown, US
Alfred Waterfeld · Freren, DE
Chadron Friesen · Hope, GB
Joseph Stuart Thrasher · Tuscaloosa, US
Ireneusz Nowak · Provo, US

Key dates

Filing date	Sep 9, 2002
Grant date	Nov 25, 2003
Priority date	—
Expiry date	Sep 9, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C43/126
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.

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