Mold or core sand, for casting, has a bonding agent with a first component of a condensed phosphate with a macro-molecular polycarbonic acid additive

摘要

The mold or core for casting, which disperses water, contains a particle material insoluble in water and especially molding sand and a bonding agent. The bonding agent has a condensed phosphate as a first bonding component with an additive of at least a macro-molecular polycarbonic acid and especially polyacrylic acid.