The binder constituent for the amine gas hardening die mold, the foundry sand constituent which is obtained from now on and lightly the sand core null ortho cresol

摘要

PROBLEM TO BE SOLVED: To provide collapsibility of a sand core which is improved compared with the conventional sand core, which contributes to reduction of energy cost and improvement of working environments.;SOLUTION: A binder composition for amine gas hardening type mold, is composed essentially of an orthocresol modified phenol resin, polyisocyanate compound, organic solvent and silicic ester and/or its hydrolysate. Molding sand composition and the sand core for casting a light alloy are obtained by using the above binder composition.;COPYRIGHT: (C)2004,JPO