Curing agent composition for making foundry molds, use of the same, method of producing the same, and method of making foundry mold
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United States of America Patent
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Oct 11, 2016
Grant Date -
Apr 30, 2015
app pub date -
Mar 14, 2013
filing date -
Apr 27, 2012
priority date (Note) -
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Abstract
A curing agent composition for making foundry molds, comprising 2,6-dihydroxybenzoic acid. In a sand composition for making foundry molds, it is preferable to use simultaneously: an acid-hardening resin which contains both a binder composition for making foundry molds which comprises one or more 5-position-substituted furfural compounds selected from the group consisting of 5-hydroxymethylfurfural and 5-acetoxymethylfurfural, and the curing agent composition for making foundry molds which comprises 2,6-dihydroxybenzoic acid. It is preferable that the content of 2,6-dihydroxybenzoic acid in the curing agent composition is 10 to 80 wt %.
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