| abstract |
The present invention relates to a process for solubilizing hydrophobic active substances in an aqueous medium, which comprises using as assistant at least one hyperbranched polymer obtainable byn (a) preparing at least one hyperbranched polyestern (a1) by polycondensing at least one dicarboxylic acid or one or more derivatives thereof with one or more at least trifunctional alcohols, or (a2) by polycondensing at least one tricarboxylic acid or higher polycarboxylic acid or one or more derivatives thereof with one or more diols, or (a3) by polycondensing at least one dicarboxylic acid or at least one derivative thereof with a mixture of at least one diol and at least one at least tetrafunctional alcohol, or (a4) by polycondensing at least one diol with a mixture of at least one dicarboxylic acid or at least one derivative thereof and at least one tricarboxylic or tetracarboxylic acid or at least one derivative thereof, n (b) reacting the polyester with at least one isocyanate or chlorocarbonic ester which carries at least one polyalkylene oxide unit attached via a carbonate group, urea group or urethane group,n or one hyperbranched polyester (a). |