| 摘要 |
The present invention relates to a mixing apparatus at least composed of a screw-based machine S 1 and a screw-based machine S 2 , where S 1 has heating equipment, at least in the plasticizing and homogenizing zone, and where the outlet from S 2 has been connected to the screw-containing barrel of S 1 , within the plasticizing or homogenizing zone of S 1 , a substantive feature of which is that the connection between S 1 and S 2 is brought about by a connector which has cooling equipment effective as far as the inner wall of the screw-containing barrel of S 1 , and to a process for preparing thermoplastically processable molding compositions, in particular additive masterbatches, from at least one thermoplastic component C 1 and at least one component C 2 , where the melting point or decomposition temperature T<SUB>M</SUB><SUP>C2 </SUP>of C 2 is lower, by at least about 50° C., than the temperature T<SUB>H</SUB><SUP>C1</SUP>, which is the lower limit of the thermoforming range of C 1 , and where most of C 2 is melted only after contact with C 1.
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