| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin composition for a shell mold which restrains smoking in forming a casting mold and retains the disintegratability of phenolic resin and the strength of the casting mold and to provide resin-coated sand using the same resin composition. SOLUTION: The resin composition for the shell mold contains phenolic resin and aromatic condensed phosphoric acid ester. Phenolic resin is served as a binder for the resin-coated sand to be used for the main mold, core and or the like for shell mold casting for cast iron, cast steel, aluminum, etc. Aromatic condensed phosphoric acid ester is very effective as a disintegrant which improves the disintegratability of the casting mold after casting. COPYRIGHT: (C)2008,JPO&INPIT
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