Method to improve flowability of alkaline phenolic resin coated sand
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United States of America Patent
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Dec 31, 1991
Grant Date -
N/A
app pub date -
Oct 10, 1989
filing date -
Oct 10, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for improving the flowability of resin coated sand which comprises the use of a flow promoter with the mixture of sand and resin. Also provided is a foundry mix comprising foundry sand, a resin binder and the flow promoter, as well as a process for making foundry cores and molds using the foundry mix. The resins are ester-curable alkaline phenolic resole resins. The flow promoter is selected from the group consisting of fatty acids, fatty alcohols, fatty amines, fatty amides and fatty alkanolamides.
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