| abstract |
The present invention provides a method for preparing a thixotropic composition containing polyurea particles, wherein a polyurea is formed by contacting and reacting a reactant in a liquid medium, and forming the polyurea particles by precipitating the polyurea. And applying acoustic vibrations during the contacting of the reactants and / or as a post-treatment to the formed polyurea particles. The invention further relates to a thixotropic composition obtained by this method, in particular a thixotropic composition comprising a large amount of polyurea particles and optionally a polymer resin having a high thixotropic efficiency. This composition can be used, in particular, as a masterbatch, in particular in the preparation of a coating composition. |