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    61.
    发明专利
    未知

    公开(公告)号：SE320505B

    公开(公告)日：1970-02-09

    申请号：SE1431265

    申请日：1965-11-05

    Applicant: HOECHST AG

    Inventor： WEISSERMEL K ,  FISCHER E ,  KUELLMAR K ,  REIHER M

    IPC: C08F2/00 ,  C08F2/02 ,  C08G2/00 ,  C08G2/06 ,  C08G1/04

    Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts. The catalyst may be diluted with an inert medium.

    62.
    发明专利
    未知

    公开(公告)号：SE308610B

    公开(公告)日：1969-02-17

    申请号：SE542864

    申请日：1964-04-30

    Applicant: HOECHST AG

    Inventor： FISCHER E

    IPC: C08G1/00

    63.
    发明专利
    未知

    公开(公告)号：FI40233B

    公开(公告)日：1968-07-31

    申请号：FI192962

    申请日：1962-10-25

    Applicant: HOECHST AG

    Inventor： GUTWEILER K ,  FISCHER E ,  KUELLMAR K ,  BIER G

    IPC: C08G2/00 ,  C08G2/38 ,  C08G4/00 ,  C08G13/00

    Abstract: A trioxane graft polymer is prepared by polymerizing trioxane in the presence of a Lewis acid and at least one primary polymer selected from the group consisting of polyethers, polyether acetals and polyacetals. The polymerization may be effected by adding the trioxane to a mixture of a polymer and Lewis acid, or by adding the acid to a mixture of trioxane and polymer or by mixing the trioxane and polymer, cooling this mixture to below its melting-point contacting with boron trifluoride gas and polymerizing at above the melting-point of trioxane. The Lewis acid may be BF3, BCl3, AlCl3, FeCl3, SbCl3, SbCl5, ZnCl2, SnCl4, TiCl4, the reaction product of borontrifluoride with dimethyl ether, methylethylether, diethyl-ether, di-isoamyl ether, tetrahydrofuran or tetrahydropyrene, an oxon-ium salt of boron trifluoride, a substituted diazonium salt containing the BF4-, ClO4- or PF6-anion which is either light active or thermoactive. Many catalysts are listed. Specifications 886,982 and 919,499 are referred to.

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