Formaldehyde scavenger for binder systems

A binder system comprising

• (i) a phenolic resin component comprising
• a) one or more phenolic resins
• b) a solvent selected from the group consisting of
• dialkyl esters of C4-C6 dicarboxylic acids,
• saturated and unsaturated fatty acid alkyl esters,
• alkylene carbonates,
• substances from the group consisting of cashew nut shell oil, components of cashew nut shell oil and derivatives of cashew nut shell oil,
• liquid hydrocarbons,
• compounds from the group of the alkylsilanes, alkyl/alkoxysilanes, alkoxysilanes, alkylsiloxanes, alkyl/alkoxysiloxanes and alkoxysiloxanes of the formula (I)
• where n is an integer from 0 to 20, and
• each R independently of the other Rs is selected from the group of the alkyl groups having one to 6 carbon atoms and alkoxy groups having one to 6 carbon atoms
• and mixtures thereof
• where based on the total mass of the phenolic resin component (i), the concentration of the phenolic resins a) is 40% to 60%
• (ii) a polyisocyanate component comprising
• c) one or more isocyanates having at least two isocyanate groups per molecule where based on the total mass of the polyisocyanate component (ii), the concentration of the isocyanates c) is 60% to 100%
• (iii) a further component comprising
• e) one or more substances selected from the group consisting of amino acids and urea
• where based on the total mass of component (iii), the total concentration of the substances e) selected from the group consisting of amino acids and urea is 0.1% to 100%,
• where components (i), (ii) and (iii) are spatially separate from one another.