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    Apparatus for atomizing highly viscous materials
    3.
    发明专利
    Apparatus for atomizing highly viscous materials 未知

    公开(公告)号：GB1131459A

    公开(公告)日：1968-10-23

    申请号：GB5490965

    申请日：1965-12-28

    Applicant: BASF AG

    Inventor： RAICHLE LUDWIG ,  MAHLER KARL ,  MUELLER HANS-JUERGEN ,  KOCH KLAUS ,  IMMEL WOLFGANG ,  URBAN FRIEDRICH ,  HOTZ JOHANN

    IPC: B01J2/04 ,  B05B7/06 ,  B05B7/10 ,  B05B7/16 ,  B29B9/00 ,  E01C19/17

    Abstract: 1,131,459. Spray-producers. BADISCHE ANILIN- & SODA-FABRIK A.G. 28 Dec., 1965 [29 Dec, 1964], No. 54909/65. Heading B2F. Apparatus suitable for spraying molten thermoplastic materials comprises a gas nozzle 10 provided with an outlet 16, a gas feed pipe 11 connected tangentially to the nozzle 10 so as to produce a whirling stream of gas, and a feed tube 4 for the spray material formed at its generally conical lower end with a ring of apertures 14 through which the material is supplied to the whirling gas stream. The apertures are formed substantially perpendicular to the tapered surface 19 of the lower end of the tube 4. The material within the tube 4 is heated by an internal heating device 7 and an external electrical heating device 8, the temperature of the devices being controlled by thermocouples 6 and 2 respectively. The outlet 16 is provided with a sharp edge 21 and an insulating sleeve 9 is located around the device 8. A plate 12 containing the oulet 16 is adjustable towards the surface 19.

    Production of thermoplastic powders
    4.
    发明专利
    Production of thermoplastic powders 未知

    公开(公告)号：GB1108972A

    公开(公告)日：1968-04-10

    申请号：GB3369965

    申请日：1965-08-06

    Applicant: BASF AG

    Inventor： HOTZ JOHANN ,  IMMEL WOLFGANG ,  KOCH KLAUS ,  MAHLER KARL ,  MUELLER HANS-JUERGEN ,  RAICHLE LUDWIG ,  URBAN FRIEDRICH

    IPC: B29B9/00 ,  B29B9/06

    Abstract: Thermoplastic synthetic resin powders are prepared by extruding the molten resin through a plurality of orifices to form strands and breaking up the strands to a powder by means of gas stream blown at a velocity of at least 100/m./sec. on to the strands as they are extruded from the orifices and in a direction perpendicular to the direction of extrusion, the flow velocity of the gas not being allowed to decrease in the region of the orifices. Specified resins are polyamides, e.g. polycaprolactam, polylaurolactam and polycapryllactam and dicarboxlic acid/diamine condensates such as those derived from adipic and sebacic acids and hexamethylenediamine, octamethylenediamine and 2,2 - (4,41 - diaminocyclohexyl) propane; and polymers of olefins, styrene, vinyl esters, vinyl ethers, alkyl acrylates and methacrylates, conjugated diolefins, vinyl chloride and tetrafluoroethylene. Apparatus suitable for carrying out the process of the invention is described and illustrated, and examples describe the preparation of powders from (1-3) "high pressure" polyethylene, (4) polylaurolactam, (5) polystyrene, (6) anethylene/vinyl acetate copolymer, (7) an ethylene/n-butyl acrylate copolymer and (8) "low pressure" polyethylene.

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