Preparation of thermoplastics containing ceramic powders as fillers
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United States of America Patent
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-
Dec 17, 1991
Grant Date -
N/A
app pub date -
Sep 11, 1990
filing date -
Sep 22, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Thermoplastic materials containing ceramic powders as fillers are prepared by introducing the thermoplastics into a mixing zone comprising a plurality of zones. The thermoplastics are melted in a first zone. In the subsequent second zone, the molten plastic is mixed with a suspension of a ceramic powder in an organic solvent, and the solvent is removed by distillation under reduced pressure in the third zone. In the fourth zone, the melt containing the ceramic powder is compressed and extruded. The process is suitable for the preparation of thermoplastic materials having a degree of filling of from 40 to 80% by volume of ceramic powders.
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