The method of producing colour-stable solutions of cellulose in N-methyl morpholine-N-oxide

The method of producing colour-stable solutions of cellulose in N-methyl morpholine-N-oxide

The method of producing colour-stable solutions of cellulose in N-methyl morpholine-N-oxide consisting in the preparation of a mixture of cellulose and of an aqueous solution of N-methyl morpholine-N-oxide which contains a thermostabiliser in the amount not exceeding 1 percent by weight compared to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LASZKIEWICZ BOGUMIL, KULPINSKI PIOTR, LEWANDOWSKI ZBIGNIEW
Format: Patent
Sprache:eng ; pol
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
DERIVATIVES THEREOF
METALLURGY
NATURAL OR ARTIFICIAL THREADS OR FIBRES
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
SPINNING
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:The method of producing colour-stable solutions of cellulose in N-methyl morpholine-N-oxide consisting in the preparation of a mixture of cellulose and of an aqueous solution of N-methyl morpholine-N-oxide which contains a thermostabiliser in the amount not exceeding 1 percent by weight compared to the weight of cellulose dry matter, and in heating this mixture at the temperature below 150 degrees C in lowered pressure for at least 60 minutes, whereby, before heating the mixture, a complex compound of hydrogen peroxide with urea in the form of urea hydroperoxide H2N-CO-NH2 H2O2 in the amount not exceeding 1 percent by weight as compared to cellulose dry matter is additionally added to the mixture of cellulose and aqueous solution of N-methyl morpholine-N-oxide, with propylester of gallic acid preferably applied as thermostabliser.