PRODUCTION OF HIGH MOLECULAR WEIGHT ACRYLONITRILE POLYMER

PURPOSE:To facilitate the production of high mol.wt. polymer with a mol.wt. above a specified value by adding a specified amount of beta-mercaptoethanol, etc., to the system in the polymerization of acrylonitrile in the presence of 4,4'-azobis-4-cyanopentanoic acid. CONSTITUTION:A polymerizable...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUSUE HIROMI, HOSAKO YOSHIHIKO, TABUCHI TAKU, NISHIHARA YOSHIHIRO
Format:	Patent
Sprache:	eng
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 MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To facilitate the production of high mol.wt. polymer with a mol.wt. above a specified value by adding a specified amount of beta-mercaptoethanol, etc., to the system in the polymerization of acrylonitrile in the presence of 4,4'-azobis-4-cyanopentanoic acid. CONSTITUTION:A polymerizable unsaturated monomer component (A) containing at least 80wt.% acrylonitrile, 4,4'-azobis-4-cyanopentanoic acid (B) as a polymerization initiator, 0.05-1wt.%, based on component A, beta-mercaptoethanol or 3- mercapto-1,2-propanediol (C) and an aqueous medium (D) are mixed together. The mixture is polymerized by heating to obtain a high mol.wt. acrylonitrile polymer of a weight-average mol.wt. of 1000000 or more. The obtained polymer has good shapability into fibers, films, etc., and can desirably be used in the production of precursors for carbon fiber, cement-reinforcing fiber as substitutes for asbestos, etc.