BINDER BASED ON PHENOLIC RESINS OF THE BENZYL ETHER TYPE, CONTAINING FREE PHENOL AND FREE HYDROXYBENZYL ALCOHOLS

摘要

The invention relates to a binder based on phenolic resins of the benzyl ether type and isocyanate compounds having at least two isocyanate groups, containing free phenol and free hydroxybenzyl alcohols in the polyol component. The invention further relates to mold material mixtures containing the binder and to cores, molds, or risers produced with the mold material mixtures and to the use thereof in metal casting.