Reducing viscosity of polyurethane spinning solns

Reducing the viscosity of a concentrated elastan soln. prior to wet or dry spinning is claimed, where an elastan soln. is disclosed as being a soln. of a polymer comprising hard polyurethane or polyurea segments and soft polyester or polyether segments in a solvent such as dimethylacetamide or DMF....

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Bibliographische Detailangaben
Hauptverfasser:	HERBERTZ, TONI, 41540 DORMAGEN, DE, ANDERHEGGEN, WOLFGANG., 41539 DORMAGEN, DE, ANTOLINI, GINO. DR., SORISOLE, IT, TUERCK, GUENTER. DR., 51539 DORMAGEN, DE, SEHM, TILO., 40591 DUESSELDORF, DE, REINEHR, ULRICH. DR., 41539 DORMAGEN, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONTROLLING MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS REGULATING SPINNING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	Reducing the viscosity of a concentrated elastan soln. prior to wet or dry spinning is claimed, where an elastan soln. is disclosed as being a soln. of a polymer comprising hard polyurethane or polyurea segments and soft polyester or polyether segments in a solvent such as dimethylacetamide or DMF. The process comprises adding a sec. aliphatic amine to the soln. in an amt. of 0.2-1 wt.% based on the polymer content of the soln., which is at least 30 wt.%, and allowing the mixt. to react at 20 deg C or more for 1-60 min. before adjusting it to a spinning temp. of 20-80 deg C.