| abstract |
Process for the preparation of water-repellent leather treatment compositions containing the stepsna) free-radical copolymerizationni) at least one ethylenically unsaturated carboxylic acid or derivatives thereof, andnii) at least one (meth) acrylate of a primary, saturated C 8 - to C 22 -alcohol,nb) mixing the reaction mixture obtained after step a) with water,nc) salinization of at least a portion of the carboxyl groups of the reaction mixture obtained according to step b) with a base, andnd) shearing the reaction mixture obtained after step c) to an average particle size of 0.05-10 μm,nwherein step a) is carried out in oil as reaction medium and wherein the atmosphere in step a) contains less than 0.1 vol .-% of an oxidizing gas. |