| abstract |
A precursor mixture comprising (av) methanesulfonic acid, (bv) one or more esters of one or more phosphorus oxo acids and (cv) one or more silanes Can be made to react. The present invention also relates to the use of the mixture as an additive to the polyisocyanate component of a two-component binder system for producing polyurethane resins. The present invention further provides a polyisocyanate-containing solution for use as a component of a molding material binder system, the use of a polyisocyanate-containing solution as a polyisocyanate component of a two-component binder system for producing a polyurethane resin, and It also relates to a corresponding two-component binder system for producing polyurethane resins. |