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6252774 
Book/Book Chapter 
CHAPTER 9 - FURANE AND OTHER BINDERS 
Sarkar, AD 
1967 
Pergamon 
Mould & Core Material for the Steel Foundry 
85-98 
Publisher Summary This chapter presents furane and other binders. The resin binders that can be hardened by simply standing in air have found very useful application in the production of large moulds and cores in the steel foundry. As the carbon dioxide process, the core boxes are rammed and hardened in situ. This means that stripping of cores and their consequent drying in stoves are eliminated resulting in a saving of labor and fuel cost. Strengths of self-curing or carbon dioxide hardened materials are comparable to conventional core sands. However, these nonstoving binders are relatively expensive. The resin binders are made by mixing various proportions of urea, formaldehyde, and furfuryl alcohol (C4H3O—CH2OH). The furane resins are expensive and binders developed from sugar and urea formaldehyde have been developed in France. The binders contain between 30% and 50 % water. The viscosity of the binders must be low to ensure complete dispersion among the sand grains. 
Sarkar, A. D.