公开(公告)号：CA2625861A1

公开(公告)日：2007-05-03

申请号：CA2625861

申请日：2006-10-17

Applicant: BASF AG

Inventor： SCHAEFER ANSGAR ,  BLANZ BIRGIT ,  GOEDEL WERNER A ,  MARTIN INGRID ,  KOLTENBURG SEBASTIAN ,  AUWETER HELMUT ,  PFLUEGER PETER

IPC: A01N25/04 ,  A01N25/28 ,  A01N43/40 ,  A01N43/653 ,  A01N47/24 ,  A01N47/34 ,  A01N53/00 ,  A01P3/00 ,  A01P7/00 ,  A01P13/00

Abstract: The present invention relates to aqueous dispersions comprising a nanoparticulate formulation of crop protection agents in which the nanoparticles have core-shell structures having a mean particle diameter of 0.05 to 2.0 mum and the crop protection agent is present in the core X-ray amorphous together with one or more polymers and the shell consists of a stabilizing coating matrix, preparable by a process which comprises (a) preparing a solution of the crop protection agent in a water-miscible organic solvent, (b) mixing the solution obtained in step (a) with the core polymer or a solution of the core polymer in a water-miscible organic solvent, where the polymer is not or only partially soluble in water or aqueous solutions or water/solvent mixtures, and (c) bringing the mixture resulting from (b) into contact with an aqueous solution comprising components of the coating matrix.