Preparation of thermoplastic compositions filled with ceramic po

Details Preparation of thermoplastic compositions filled with ceramic po Preparation of thermoplastic compositions filled with ceramic po

1990-09-11

1991-12-17

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

264211, 26421123, B29C 4700, B29C 4776

Patent

active

050733192

ABSTRACT:
A thermoplastic composition containing a ceramic powder per volume fill level of from 40 to 80% together with an oxidic sinter additive is prepared by melting the thermoplastic in a first zone of a mixing section consisting of a plurality of zones, admixing the molten plastic in the adjoining second zone with a suspension of a ceramic powder in an organic solvent which contains a hydrolyzable precursor compound of the oxidic sinter additive in solution, hydrolyzing the precursor compound in the third zone by adding water, removing the solvent and any volatile hydrolysis products by distillation under reduced pressure in the fourth zone, and compressing and extruding the melt containing the ceramic powder from the fifth zone.

REFERENCES:
patent: 3523916 (1970-08-01), Needham et al.
patent: 4360489 (1982-11-01), Tusim
patent: 4965039 (1990-10-01), Schuetz

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