Procedure for obtaining a base of Furan Resin Binder for Foundry Sand and cores.

摘要

Procedure for obtaining a base of Furan Resin Binder for Foundry Sand and cores. It precondensa urea with formaldehyde in the presence of furfuryl alcohol, followed by cross-linking in the presence of Strong acids and acid toluenosulfonico acid as a Catalyst.The precondensacion is verified in the presence of an extender type sorbitol, which replaces all or part of the said extender furfuryl alcohol, being partly replaced, if necessary, and may contain a small amount of Sugar alcohols di - and / or oligomeric Derivatives of I Xitol.