2.
    发明专利
    未知

    公开(公告)号:DE3522359A1

    公开(公告)日:1987-01-02

    申请号:DE3522359

    申请日:1985-06-22

    Applicant: BASF AG

    Abstract: In order to compound organic materials which are crystalline under standard conditions, these materials, in the pulverulent and/or molten state, are processed in a self-purging, twin-screw extruder in which the screws rotate in the same direction, ejected through one or more narrow passages into a low pressure zone, cooled and comminuted to give particles. In order to improve the pourability and shelf life, the materials are completely crystallized by the time they reach the end of the screws, and are heated during discharge through the narrow passage, in order to form a melt film. Dust-free granules havig a smooth surface can be produced in this manner.

    3.
    发明专利
    未知

    公开(公告)号:DE3682235D1

    公开(公告)日:1991-12-05

    申请号:DE3682235

    申请日:1986-06-19

    Applicant: BASF AG

    Abstract: In the working up of organic materials which are normally crystalline, where the materials, as powder or liq. melt, are processed in a 2-shaft screw machine with the worm shafts rotating in the same direction, are expelled through a narrowed passage into a zone at low pressure, and are cooled and comminuted, the materials are heated to form a melt film during transit through the narrowed passage.

    10.
    发明专利
    未知

    公开(公告)号:DE1704481A1

    公开(公告)日:1971-05-27

    申请号:DE1704481

    申请日:1967-06-23

    Applicant: BASF AG

    Inventor: HOTZ JOHANN

Patent Agency Ranking