RESIN COMPOSITION FOR SHELL MOLDS AND RESIN-COATED SAND

摘要

A resin composition for shell molds which is suppressed in the smoking in forming molds and retains the disintegration properties and mold strength inherent in the shell mold formed by using a phenol resin; and a resin-coated sand prepared by using the same. The resin composition comprises a phenol resin and an aromatic condensed phosphate. The phenol resin serves as a binder in the resin-coated sand to be used in producing shell molds and shell cores for the shell mold casting of cast iron, cast steel, or aluminum, while the aromatic condensed phosphate serves as an extremely effective disintegrator for improving the disintegration properties of shell molds after pouring.