| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of remarkably controlling the generation of formaldehyde during or after molding works and useful for producing molds, etc., by mixing a thermosetting resin with a specific compound. SOLUTION: This thermosetting resin composition for resin-coated sand used for producing molds is obtained by mixing (A) a thermosetting resin containing formaldehyde with (B) at least one compound selected from a compound of formula I [X is O or S; R1-R4 are each H, a 1-8C (substituted) alkyl, a 3-8C (substituted) cycloalkyl or the like] and a compound of formula II [R5-R9 are each H, a 1-8C (substituted) alkyl, a 3-8C (substituted) cycloalkyl or the like] in an amount of 0.1-10 wt.% based on the component A. The component B includes a hydrazo compound such as hydrazodicarbonamide.
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