LIGHT-FAST POLYISOCYANATES HAVING GOOD SOLUBILITY IN NON-POLAR SOLVENTS

摘要

The present invention relates to polyisocyanate mixtures prepared from aliphatic and/or cycloaliphatic diisocyanates and having a) an average isocyanate functionality of at least 2.0, b) a content of isocyanate groups (calculated as NCO; molecular weight = 42) of 4.0 to 28.0 wt.% and c) a content of alkoxy groups having up to 36 carbon atoms of 2.0 to 37.5 wt.%, wherein the alkoxy groups are constituents of allophanate groups or optionally urethane groups, provided that >50 mol% of the alkoxy groups are a constituent of allophanate groups that are connected to at least two polyisocyanate molecules which are each prepared from at least two diisocyanates. The present invention also relates to a process for preparing these polyisocyanate mixtures and to coating compositions, which are highly diluted or dilutable with non-polar solvents and contain these polyisocyanate mixtures and lacquer binders or binder components optionally containing isocyanate-reactive groups.