34f08f34_rials_patent_application_class__Description
20150114588 04-30-2015 [Description] 
CURING AGENT COMPOSITION FOR MAKING FOUNDRY MOLDS, USE OF THE SAME, METHOD OF PRODUCING THE SAME, AND METHOD OF MAKING FOUNDRY MOLD - 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 %.
Utilizing particular mold materials patent application class