Method for reclaiming investment casting wax compositions and the compositions obtainable thereby
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United States of America Patent
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May 23, 2000
Grant Date -
N/A
app pub date -
Nov 5, 1998
filing date -
Nov 7, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A used investment casting wax composition containing a filler and/or a residue after a wax component is removed from the composition is dissolved or dispersed into an organic solvent. The mixture is separated into a dissolved wax fraction and a wax-containing solids fraction. The organic solvent in the dissolved wax fraction is removed to recover a wax component, while the wax component and the organic solvent in the wax-containing solids fraction are removed to recover a crude filler. The crude filler is washed with water and/or an aqueous alkaline solution to recover a high-purity filler. A reclaimed investment casting wax thus obtainable is less degraded by heat.
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