Molding material mixture containing Cardol and / or Cardanol in foundry binders based on polyurethane, process for the preparation of a molded article and use thereof

摘要

Molding material mixture for the production of moldings for the foundry industry, comprising at least: - a refractory molding material; and a polyurethane-based binder system which comprises a polyisocyanate component and a polyol component, the polyol component is formed from a benzyl ether resin and wherein the binder system contains at least a proportion of cardol and / or cardanol and / or their derivatives, wherein the derivatives on at least one double bond of the Side chain are derivatized, and the cardol and / or cardanol and / or derivatives thereof can also be incorporated in the benzyl ether resin / can.