METHOD FOR PREPARING A THERMOPLASTIC COMPOSITION

A method for preparing a thermoplastic composition comprising grafted cellulose and optionally grafted hemicelluloses is disclosed. The method comprises providing a composition comprising cellulose and optionally hemicelluloses; dissolving the cellulose and optionally the hemicelluloses of the compo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Pohjalainen, Teemu, Virtanen, Pasi, Modig, Sakari, Sapkota, Janak, Kosonen, Harri, Ristolainen, Matti
Format:	Patent
Sprache:	eng ; fin ; swe
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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 DERIVATIVES THEREOF IMPREGNATING OR COATING OF PAPER MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS POLYSACCHARIDES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method for preparing a thermoplastic composition comprising grafted cellulose and optionally grafted hemicelluloses is disclosed. The method comprises providing a composition comprising cellulose and optionally hemicelluloses; dissolving the cellulose and optionally the hemicelluloses of the composition at least partially, thereby obtaining a solution comprising solubilized cellulose and optionally solubilized hemicelluloses; adding a cyclic ester monomer to the solution, such that the cyclic ester monomer reacts with the solubilized cellulose and optionally the solubilized hemicelluloses, thereby grafting the solubilized cellulose and optionally the solubilized hemicelluloses with the cyclic ester monomer at least partially; and coagulating the grafted cellulose and optionally the grafted hemicelluloses, thereby obtaining the thermoplastic composition. Esitetään menetelmä oksastettua selluloosaa ja valinnaisesti oksastettuja hemiselluloosia käsittävän termoplastisen koostumuksen valmistamiseksi. Menetelmä käsittää, että järjestetään koostumus, joka käsittää selluloosaa ja valinnaisesti hemiselluloosia; liuotetaan koostumuksen selluloosa ja valinnaisesti hemiselluloosat ainakin osittain, niin että saadaan liuos, joka käsittää liuennutta selluloosaa ja valinnaisesti liuenneita hemiselluloosia; lisätään syklisen esterin monomeeri liuokseen siten, että syklisen esterin monomeeri reagoi liuenneen selluloosan ja valinnaisesti liuenneiden hemiselluloosien kanssa, niin että liuennut selluloosa ja valinnaisesti liuenneet hemiselluloosat oksastetaan ainakin osittain syklisen esterin monomeerilla; ja koaguloidaan oksastettu selluloosa ja valinnaisesti oksastetut hemiselluloosat, niin että saadaan termoplastinen koostumus.