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    • 2. 发明专利
    • DE1301096B
    • 1969-08-14
    • DEF0045425
    • 1965-03-05
    • HOECHST AG
    • FISCHEREDGAR DIPL-CHEM DRASMUSKLAUS DIPL-CHEM DRSCHOTTCLAUS DIPL-CHEM DR
    • C08G2/00C08G2/18C08G1/14
    • Copolymers comprise 97.9-88% by weight of trioxane, 2 to 10% by weight of a cyclice ether, and 0.1 to 2% by weight of an alkyl-glycidyl-formal. They are prepared using a cationic catalyst and a temperature range of -50 DEG C. to + 100 DEG C. Specified cyclic ethers are ethylene and propylene oxides, epichlorhydrin, glycol- and diglycol-formal, and 4-chloromethyl dioxolane. Suitable catalysts are inorganic and organic acids, acid halides, and Lewis Acids e.g. BF3 etherates, and diazonium fluoroborates. The polymerization may be in bulk, in solution, or in suspension. The catalysts may be inactivated after polymerisation using e.g. ammonia or a methanolic solution of an aromatic amine. The copolymers may be stabilized against heat by using e.g. polyamides, amides of polybasic carboxylic acids, amidines, and ureas, against oxidation by using e.g. phenols and aromatic amines, and against light by using e.g. a -hydroxybenzophenone derivatives. The copolymers may be formed into foils, films, or fibres, and may also be ground and comminuted.