Foundry moulding composition

Details Foundry moulding composition Foundry moulding composition

C - Chemistry, Metallurgy

08

K

22/164, 252/41,

C08K 13/02 (2006.01) B22C 1/00 (2006.01) B22C 1/16 (2006.01) B22C 1/22 (2006.01) C08L 61/10 (2006.01)

Patent

CA 1330339

TITLE OF THE INVENTION FOUNDRY MOULDING COMPOSITION ABSTRACT OF THE DISCLOSURE The invention relates to foundry moulding compositions useful for producing moulds for the manufacture of metal castings wherein the moulds are capable of giving castings with good surface finish without the need for conventional separate blacking applications. A foundry moulding composition of the invention comprises refractory material such as sand, alkali phenol-formaldehyde resole resin solution, carbonifiable material such as styrenated phenol, and an effective amount of an organic ester for hardening the composition. In another embodiment, the invention is a binder composition comprising alkali phenol-formaldehyde resole resin solution and carbonifiable material capable of being hardened by reaction with organic ester. In another embodiment, the invention is a curing additive for a foundry binder comprising carbonifiable material and liquid ester such as gamma-butyrolactone, and the like. In another embodiment, the invention is a method of making a foundry mould wherein a mixture of sand, resin and carbonifiable material is shaped, and then hardened with a gaseous ester such as methyl formate.

587948

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