Process for improving the flow properties of polyurethane elastomers

In order to improve the flow properties, thermoplastic polyurethane elastomers having molecular weights of greater than 30,000 at temperatures of 150 to 230 DEG C and shear rates of from 10 to 2,000 sec are treated for from 0.1 to 20 minutes with alcohols, monoamines and/or diamines in amounts of fr...

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Bibliographische Detailangaben
Hauptverfasser:	HACKL,CHRISTA, BITTNER,GERHARD,.DR, WERNER,FRANK,.DR, MALTE,.ROMBRECHT,HANS
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	In order to improve the flow properties, thermoplastic polyurethane elastomers having molecular weights of greater than 30,000 at temperatures of 150 to 230 DEG C and shear rates of from 10 to 2,000 sec are treated for from 0.1 to 20 minutes with alcohols, monoamines and/or diamines in amounts of from 0.01 to 10% by weight, based on the weight of the polyurethane elastomers.