Foundry binder systems which contain alcohol modified polyisocyanates
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United States of America Patent
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Sep 26, 2000
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N/A
app pub date -
Nov 20, 1998
filing date -
Nov 7, 1997
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Expired
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Abstract
The invention relates to foundry binder systems which use modified polyisocyanates. The modified polyisocyanates are prepared by reacting a polyisocyanate with an aliphatic alcohol having one active hydrogen atom. These modified polyisocyanates, along with a phenolic resole resin, are added to a foundry aggregate to form a foundry mix which is shaped and cured with a gaseous amine curing catalyst.
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