PROCESS FOR PURIFICATION OF WATER SOLUBLE POLYMERS

A process for purification of water soluble polymers is provided. A polym er of interest can be separated from a mixture of polymers, provided the pol ymer of interest differs from other polymers in the mixture in the number of reactive terminal groups. The process involves derivatizing polymers at...

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Hauptverfasser:	MONTHONY, JAMES F, WINSLOW, CHRISTOPHER D, KERSHAW, KURT E, RILEY, JOHN G, YANG, LI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MEASURING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS SEPARATION TESTING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for purification of water soluble polymers is provided. A polym er of interest can be separated from a mixture of polymers, provided the pol ymer of interest differs from other polymers in the mixture in the number of reactive terminal groups. The process involves derivatizing polymers at the reactive terminal groups with a derivatizing molecule, bearing either (i) t wo or three cationic or anionic ionizable groups, and a group capable of cov alent bonding to the reactive terminal groups or (ii) three or four ionizabl e groups, at least one of which is capable of covalent bonding to the reacti ve terminal groups; followed by ion exchange. The process allows removal of PEG from MPEG, and can be used for polymers having an average size greater t han 9,000 Da Derivatization may be reversible in order to allow re-use of re covered contaminant polymers.