The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1989
Filed:
Mar. 10, 1987
Applicant:
Inventor:
Brian Hendy, Middlesbrough, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 64 ; 521 27 ; 521 28 ; 524465 ; 524475 ; 427384 ; 427244 ; 427245 ; 427246 ; 21050041 ; 210650 ; 210653 ; 210654 ;
Abstract
A sulphonated aromatic polymer containing repeating units (Ar-Y) (where Y is SO.sub.2 and/or CO), where at least half of groups Ar contain a group SO.sub.3 M and M is l/m of a polyvalent metal cation in at least 80% of such groups SO.sub.3 M, and where m is the valency of the ion. The polyvalent cation compound is formed by heating the corresponding sulphonic acid or monovalent cation compound with a salt of a polyvalent metal. The polymer is useful as a membrane and the polyvalent metal salt addition and/or the heat treatment may be applied to polymer in membrane form.