Lacquer polyisocyanates with aliphatically and aromatically bound isocyanate groups

A process for preparing a liquid lacquer polyisocyanate having aliphatically and aromatically bound isocyanate groups and an NCO content of 5 to 25 wt. %, based on solids, by catalytically trimerizing

• A) 100 parts by weigt of an aromatic isocyanate component containing
• A1) 70 to 100 wt. % of 2,4- and/or 2,6-diisocyanatotoluene (TDI) and
• A2) 0 to 30 wt. % of one or more aromatic isocyanates other than TDI having a molecular weight of 119 to 350,
• wherein the percentages of A1) and A2) add up to 100 and
• B) 15 to 700 parts by weight of an aliphatic isocyanate component containing one or more lacquer polyisocyanates having exclusively aliphatically bound isocyanate groups, an NCO content of 10 to 25 wt %, a concentration of distillable, monomeric diisocyanates of less than 0.7 wt. % and a viscosity of less than 10,000 mPa.s at 23.degree. C., optionally with prior, simultaneous and/or subsequent reaction of a portion of the isocyanate groups with
• C) up to 40 equivalent percent, based on the isocyanate groups of component A), of an alcohol component containing one or more alcohols having a molecular weight of 32 to 900 and optionally in the presence of
• D) one or more solvents which are inert towards isocyanate groups, until the concentration of distillable, monomeric isocyanates A) has dropped to less than 0.5 wt. %, based on the weight of the total mixture.