Patent · US Expired

Cation exchange membrane with high equivalent weight component

US4411750A · kind A · utility

3Cited by

3References

5Claims

0Family size

Assignee

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

Inventors

Raimund H. Silva · Wilmington, US
Roger A. Smith · Kennett Square, US

Key dates

Filing date	Sep 20, 1982
Grant date	Oct 25, 1983
Priority date	—
Expiry date	Sep 20, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2327/12
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Composite fluorocarbon cation exchange membrane having at least two layers of fluorinated polymer containing pendant side chains with sulfonyl groups wherein the equivalent weight of one such layer differs from the adjacent layer by at least 100.

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