Patent · US Expired

Process for the preparation of perfluorinated ethers

US5091589A · kind A · utility

8Cited by

5References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Matthias Meyer · Stade, DE
Ralf Stapel · Kelkheim, DE
Hariolf Kottmann · Hofheim, DE
Thomas Gries · Solon, US

Key dates

Filing date	Feb 28, 1991
Grant date	Feb 25, 1992
Priority date	—
Expiry date	Feb 28, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/321
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of fluorinated ethers of the formula (I) EQU F.sub.3 C(CF.sub.2).sub.2 --O--CF(CF.sub.3)CF.sub.2 --O).sub.n CHFCF.sub.3 (I) where n is an integer from 10 to 60, from the compounds of the formula(II) EQU F.sub.3 C(CF.sub.2).sub.2 --O--CF(CF.sub.3)CF.sub.2 --O).sub.n CF(CF.sub.3)COF (II) where n has the above meaning, by reaction with alkali metal hydroxide at temperatures of 90.degree. to 160.degree. C. and in the absence of solvents.

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