CARBOXYLGRUPPEN FUNKTIONALE POLYURETHAN-POLYMERE SOWIE IHRE VERWENDUNG IN MAGNETISCHEN AUFZEICHNUNGSMEDIEN

The invention provides novel polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise multidentate chelating functional groups pendant from the polymer backbone, which groups are produced by esterification of backbone hydroxyl moieties with cyclic dicarboxyl...

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Bibliographische Detailangaben
Hauptverfasser:	CARLSON, JAMES, G., SAINT PAUL, MN 55133-3427, US, TRUONG, JACK, G., SAINT PAUL, MN 55133-3427, US, ANDERSON, JEFFREY, T., SAINT PAUL, MN 55133-3427, US, ROTTO, NELSON, T., SAINT PAUL, MN 55133-3427, US
Format:	Patent
Sprache:	ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention provides novel polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise multidentate chelating functional groups pendant from the polymer backbone, which groups are produced by esterification of backbone hydroxyl moieties with cyclic dicarboxylic acid anhydrides which also bear an additional polar functional group such as those selected from the group consisting of -H, -OH, -COOM, -SO3M, -SH, -CH2COOM, -SCH2COOM, -P(=O)(OM)2, -OP(=O)(OM)2, and the like. Examples of anhydrides useful in preparation of the polyurethanes include anhydrides of citric acid, mercaptosuccinic acid, dimercaptosuccinic acid and nitrilotriacetic acid. The polyurethanes, which are optionally radiation curable, show high affinity for magnetic pigments, and blends of the polyurethanes with vinyl resins afford excellent binders for magnetic recording media.