| abstract |
The present invention relates to modified phenolic resins containing silicic acid ester units. The modified phenolic resins may, for. B. as a component of foundry binder systems use. The invention also relates to a process for preparing such modified phenolic resins and two-component binder systems containing these modified phenolic resins. Moreover, the invention relates to processes for the production of foundry molds and foundry cores containing the modified phenolic resins and the foundry molds and foundry cores themselves. |