18.
    发明专利
    未知

    公开(公告)号:DE19733504A1

    公开(公告)日:1999-02-04

    申请号:DE19733504

    申请日:1997-08-01

    Applicant: BASF AG

    Abstract: The invention relates to slow sinking, porous granules or pellets with a density of greater than 1 g/cm for use in fish breeding. The inventive granules or pellets are obtained by solvent-free melt extrusion of mixtures consisting of biologically active substances, matrix support substances and a solid gas producer.

    19.
    发明专利
    未知

    公开(公告)号:DE19721467A1

    公开(公告)日:1998-11-26

    申请号:DE19721467

    申请日:1997-05-22

    Applicant: BASF AG

    Abstract: The invention relates to a method for the continuous production of solid, particle-based preparations of biologically active substances, in which preparations the biologically active substances are homogeneously distributed in a matrix of additives which can be thermoplastically processed, in a screw extruder divided into several zones. Said method is characterized in that the matrix additives are first melted in a heatable area and the biologically active components mixed with the matrix additives. Thereafter, the mixture is cooled, pre-crushed and finely ground in a cooling zone. The screw geometry of the cooling zone is designed in such a way that the cooling zone comprises a conveyor zone, a mixing zone and a kneading zone.

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