Foundry binders

Details Foundry binders Foundry binders

C - Chemistry, Metallurgy

08

G

22/160, 402/362,

C08G 65/40 (2006.01) B22C 1/22 (2006.01)

Patent

CA 1133195

Abstract: A foundry mould or core is prepared by mixing with a foundry aggregate a polyisocyanate, a polymeric addition product of a phenol and a further material comprising aromatic hydroxyl groups, forming the mixture to the required shape and causing or permitting the polyisocyanate to react with both the addition product and the further material to bind the aggregate. The addition product may be prepared by reacting an unsatur- ated hydrocarbon with a phenol. The hydrocarbon may be comprised by a mixture of terpenes. The further hydroxy material may be a bisphenol or a phenolic resin.

319628

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