Low-viscosity polyurethane acrylate dispersions

摘要

The invention relates to a method for producing low-viscosity radiation-curable aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilized by means of hydroxy functionalized carbolic acids have a lower initial viscosity if a majority of the urethanization, that is, converting of the NCO functionalized compounds with the O H-functionalized compounds, takes place initially without the presence of the acid-bearing compounds, and the acid-bearing compounds are installed by means of the hydroxyl function thereof as late as possible.