THERMOPLASTIC POLYURETHANES AND THEIR PREPARATION

This invention describes how to prepare thermoplastic polyurethanes by reacting (a) isocyanates with (b) isocyanate-reactive compounds, in presence or absence of (c) chain expanders, (d) catalysts and (e) usual adjuvants and additives, and continuously adding crosslinked polyurethanes before, during...

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Bibliographische Detailangaben
Hauptverfasser:	PETER HORN, RUEDIGER KRECH, GERHARD LEHR, HORST KING, MANFRED GENZ, FRANK PRISSOK
Format:	Patent
Sprache:	eng ; spa
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	This invention describes how to prepare thermoplastic polyurethanes by reacting (a) isocyanates with (b) isocyanate-reactive compounds, in presence or absence of (c) chain expanders, (d) catalysts and (e) usual adjuvants and additives, and continuously adding crosslinked polyurethanes before, during and/or after reaction. Se preparan poliuretanos termoplásticos haciendo reaccionar (a) isocianatos con (b) compuestos reactivos a los isocianatos, en la presencia o ausencia de (c) extendedores de cadena, (d) catalizadores y (e) auxiliares y aditivos usuales y agregando poliuretanos reticulados en forma conminuta ante, durante y/o después de la reaccion.