Chemical products for the foundry industry, in particular additives for the use in foundries for the production of moulds, cores and/or feeders; binding agents for the use in foundries for the production of moulds, cores and/or feeders; polyurethane-based artificial resin binders for the use in foundries for the production of moulds, cores and/or feeders; binding agent comprising at least one phenolic resin component and/or at least one isocyanate component for binding moulds, cores and/or fe...