Process for preparing polycarbonate terpolymer foam suitable for lost foam casting
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United States of America Patent
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Aug 16, 1988
Grant Date -
N/A
app pub date -
Dec 14, 1987
filing date -
Dec 14, 1987
priority date (Note) -
Expired
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Abstract
The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a terpolymer polycarbonate prepared from cyclopentene oxide or cyclohexene oxide, ethylene oxide, propylene oxide, or butylene oxide, and carbon dioxide in making patterns for the lost foam casting process.
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