| 摘要 |
Disclosed herein is an aqueous multicomponent system comprising (I) at least one aqueous binder component comprising (A) at least one secondary dispersion comprising (A1) at least one water-soluble or water-dispersible (meth)acrylate copolymer which can be prepared by a multistage copolymerization and has at least two isocyanate-reactive functional groups, and (A2) at least one low molecular weight or oligomeric, or at least one low molecular weight and oligomeric, substantially unbranched, hydrophobic polyester having at least two hydroxyl groups in the molecule, an OH number of 56 to 500 mg KOH/g, an acid number less than 10 mg KOH/g, and a number-average molecular weight Mn of 300 to 2000 Daltons, the at least one aqueous binder further comprising (B) at least one additive. The aqueous multicomponent system further comprises at least one water-free crosslinking component comprising at least one hydrophilicized polyisocyanate. Also disclosed is a process for preparing the foregoing aqueous multicomponent system.
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