New polyisocyanate mixtures, a process for their preparation and their use in coating compositions

The invention provides novel polyisocyanate mixtures, a process for preparing the same and the application thereof in coating compositions, and relates to modified polyisocyanates of multi acrylate, which prepares aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates that NCO component is 5wt%-25wt%, NCO functionality >=2 and viscosity of resin without dissolvent is 150-200,000mPa.s which is detected at 23 DEG C, and contains at least one structural unit of a general formula (I), wherein R is hydrogen or metyl group, R1 is hydrocarbyl group which contains optional heteroatom, and R2 is hydrocarbyl group which contains at least one isocyanate group and optional methyl carbamate, allophanic formic ether, biuret, isocyanate dimer, isocyanurate and/or imino oxadiazile diketone group, and n is >=1. The invention also relates to a method for preparing the multi isocyanates, and relates to base material compound which contains the multi isocyanates which can be carried out hydrophilic modification and compound which has NCO reactive group.