Curing agent composition for making foundry molds, use of the same, method of producing the same, and method of making foundry mold

摘要

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 %.

主权项

1. A sand composition for making foundry molds, comprising a refractory particulate material, a binder composition for making foundry molds that comprises an acid-hardening resin and a curing agent composition for making foundry molds comprising 2,6-dihydroxybenzoic acid,
wherein the binder composition for making foundry molds is contained in an amount of 0.5 to 3.0 parts by weight for 100 parts by weight of the refractory particulate material, and the curing agent composition for making foundry molds is contained in an amount of 0.07 to 2.0 parts by weight for the same.