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:
Oct. 03, 1978
Filed:
Jan. 31, 1977
Xavier Marze, Lyons, FR;
Rhone-Poulenc S.A., Paris, FR;
Abstract
Ionically crosslinked polymers which are soluble in a liquid organic medium and which correspond to the general formula: ##STR1## in which: the symbol N.sym. represents a quaternary nitrogen-containing group; the symbol ##STR2## REPRESENTS A MACROMOLECULAR CHAIN CARRYING GROUPS WHICH ARE CAPABLE OF BEING LINKED, VIA A COVALENT BOND, TO -SO.sub.3 .crclbar. groups; the symbol ##STR3## REPRESENTS A MACROMOLECULAR CHAIN CARRYING GROUPS WHICH CAN GIVE RISE TO THE FORMATION OF N.sym. groups, the symbol ##STR4## INDICATING THAT THE N.sym. groups are linked to the macromolecular chain by at least one covalent bond, and the chains ##STR5## CONSIDERED TOGETHER, DO NOT CONTAIN OPPOSITELY CHARGED GROUPS WHICH ARE CAPABLE OF FORMING INTER-CHAIN COVALENT BONDS, THE RATIO N/M IS BETWEEN 0.1 AND 10; AND THE NATURE OF THE UNITS FORMING THE MACROMOLECULAR CHAINS AND THE VALUES OF N AND M BEING SUCH THAT A POLYMER OF FORMULA (I.sub.1) ##STR6## IN WHICH M represents a hydrogen ion or an alkali metal or alkaline earth metal ion and x is 1 or 2, and a polymer of formula (I.sub.2) ##STR7## IN WHICH A represents a hydroxyl radical or the anion of an inorganic or organic acid of formula AH.sub.y, y being equal to 1, 2 or 3, are both insoluble in water but soluble in a common liquid organic medium are provided having properties making them suitable for use as, inter alia, membranes for ultrafiltration, dialysis and osmosis.