Patent · US Expired

Process for the fluorination of polymers, and perfluorinated ion exchangers

US4522952A · kind A · utility

13Cited by

3References

1Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Joachim Klein · Hochspeyer, DE
Hartmut Widdecke · Bokensdorf, DE
Frank Doscher · Langenfeld, DE
Fritz Pohl · Wittmund, DE

Key dates

Filing date	Nov 8, 1983
Grant date	Jun 11, 1985
Priority date	—
Expiry date	Nov 8, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F8/22
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparation of a highly fluorinated polymer by converting a polymer containing the recurring unit R--S'--X.sub.m, in which R denotes a base unit forming the matrix, X denotes identical or different functional groups, with the exception of halogen, and S' is an aromatic or araliphatic radical with m+1 free valencies, m being at least 1, into a highly fluorinated polymer by fluorination with elementary fluorine. The process is particularly useful for the preparation of cation exchangers, such as those which contain the unit ##STR1## in which C.sub.6 F.sub.10 represents a perfluorinated cyclohexyl ring.

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