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    Polymers and copolymers of trioxane
    1.
    发明专利
    Polymers and copolymers of trioxane 未知

    公开(公告)号：GB1106214A

    公开(公告)日：1968-03-13

    申请号：GB2913365

    申请日：1965-07-09

    Applicant: BASF AG

    Inventor： SPERBER HEINRICH ,  HEEL HELMUT ,  SCHMIDT FRANZ ,  AMMON HANS VON ,  SCHMITT ERWIN ,  MICHEL HEINZ

    IPC: B29C33/62 ,  B29C39/00 ,  B29C39/06 ,  B29C39/26 ,  B29C39/36 ,  B29C39/38 ,  C08G2/00

    Abstract: Polymers and copolymers of trioxane are produced in substance by means of cationic catalysts at 60 DEG to 120 DEG C. by introducing the reaction components on to a flat chamber mould, having a small open surface, capable of being cooled externally and provided with a lining of an apolar plastics within a period which is shorter than the induction time of the polymerization, cooling the mould during the polymerization, and keeping the temperature of the mould above the melting point of the reaction components while the mould is being emptied. Cyclic ethers, cyclic acetals, cyclic ketals, cyclic esters, and polyacetals are specified comonomers, boron triflouride and its co-ordination complexes being preferred catalysts. Polyethylene, polypropylene and polytetrafluoroethylene are specified apolar plastics. Apparatus for carrying out the process is described.

    Manufacture of plastics articles
    4.
    发明专利
    Manufacture of plastics articles 未知

    公开(公告)号：GB1094254A

    公开(公告)日：1967-12-06

    申请号：GB940365

    申请日：1965-03-05

    Applicant: BASF AG

    Inventor： RAICHLE LUDWIG ,  JUNG HANS ,  JOHN GUENTHER ,  AMMON HANS VON

    IPC: B29C39/00 ,  B29C39/26 ,  B29C39/38 ,  B29C67/00

    Abstract: 1,094,254. Polymerizing in a mould. BADISCHE ANILIN- & SODA-FABRIK A.G. March 5, 1965 [March 7, 1964], No. 9403/65. Heading B5A. In a process for making thermoplastic articles by polymerization in a mould, use is made of a jacketed mould 2, Fig. 1, having top and bottom walls 3 and 1 which support a rotatable hollow core 4. The mould walls are preheated to a temperature below the maximum temperature occurring during polymerization and the core is rotated to generate a velocity gradient across the thermoplastic material. To produce profiles the reactants are introduced into the chamber 28, Fig. 5, defined by the rotating core 27 and the wall surface 26. An ultra-sonic vibrator 29 is located at the outlet 25 from which the moulded article is withdrawn by support means 31.

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