BINDER COMPOSITION FOR MAKING MOLD AND COMPOSITION FOR MAKING MOLD, AND METHOD FOR MAKING MOLD FOR CASTING

摘要

PROBLEM TO BE SOLVED: To provide a binder composition with which in a method for making a mold using the binder composition for making a self-hardening mold using water-soluble phenol resin as the binder and hardening the binder with an organic ester, the development of odor of formaldehyde at mold-making time and at casting time is restrained without developing the deterioration and also, increasing the viscosity of the water-soluble phenol resin in storage. SOLUTION: The binder composition for making the self-hardening mold is composed of ethylene-urea solution of the organic ethylene or organic ethylene mixed solution having≥0.1 wt% ethylene-urea solubility in the organic ester or the organic ester mixed solution as A component and the water-soluble phenol resin as B component. COPYRIGHT: (C)2005,JPO&NCIPI