New cross-linking systems for aqueous polymer dispersions, in particular dispersion adhesives

摘要

Two-component system (2K-system) (preferably two-component dispersion adhesive system), comprises at least a polymer dispersion on the one hand and an isocyanate-based cross-linking component (hardener component) for the polymer dispersion on the other hand, where the isocyanate-based cross-linking component comprises a mixture of at least an aliphatic isocyanate and at least an aromatic isocyanate. Independent claims are included for: (1) procedure for the cross-linking of a polymer dispersion as a component of a two-component system (2K-system), preferably a two-component dispersion adhesive system, comprising adding polymer dispersion to an isocyanate-based cross-linking components (hardener component), where the isocyanate-based cross-linking component is a mixture of at least an aliphatic isocyanate and at least an aromatic isocyanate; and (2) use of a mixture from an aliphatic isocyanate and at least an aromatic isocyanate as isocyanate-based cross-linking-component (hardener component) for a polymer dispersion, preferably a two-component system (2K-system), preferably a two-component dispersion adhesive system, is useful for the increase of the final strength of the adhesive, preferably the heat resistance and/or the moisture stability.