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Se dan a conocer composiciones y métodos para mejorar las caracteristicas de los núcleos de fundición que incluye añadir, a un agregado de fundición, una mezcla del aglutinante de resina de poliuretano que comprende resina epoxídica y de preferencia aceite parfínico.Compositions and methods are disclosed for improving the characteristics of foundry cores including adding, to a foundry aggregate, a mixture of the polyurethane resin binder comprising epoxy resin and preferably parphinic oil.
ECSP9617761996-06-061996-06-06
URETHAN FOUNDRY BINDERS RESISTANT TO WATER BASED COATINGS
ECSP961776A
(en)
POLYURETHANE PREPOLIMEROS THAT PRESENT ALCOXISILANO AND HIDANTOINE GROUPS, A PROCEDURE FOR ITS PREPARATION AS WELL AS USE FOR THE PREPARATION OF SEALED MATERIALS.
SYNTHETIC RESIN BINDERS BASED ON AN AQUEOUS MIXTURE OF DIFFERENT PHENOLIC RESINS, PROCEDURE FOR THE MANUFACTURE OF ABRASIVE MEDIA WITH THESE BINDERS AND ABRASIVE MEDIA CONTAINING THEM