| 摘要 |
A curing agent composition for use in producing a mold containing 2,6 dihydroxybenzoic acid. In a sand composition for the production of a mold it is preferable to use simultaneously: a binder composition which is for use in producing a mold and which contains both an acid curable resin and at least one 5 substituted furfural compound selected from the group consisting of 5 hydroxymethylfurfural and 5 acetoxymethylfurfural; and a curing agent composition which is for use in producing a mold and which contains 2,6 dihydroxybenzoic acid. It is preferable that the content of 2,6 dihydroxybenzoic acid in the curing agent composition is 10 to 80wt%. |
