| 摘要 |
The re-use of lacquer slurry in the manufacture of aqueous coating agents is described, A) one part by weight of freshly obtained lacquer slurry with a water content of 10 to 50% by weight being incorporated under shearing action into B) 0.15 to 0.6 parts by weight of a mixture of B1) one or more organic solvents with a water solubility exceeding 500 g per liter of water at 20 DEG C., B2) one or more organic solvents with a water solubility below 500 g per liter of water at 20 DEG C., B3) one or more amines and/or aminoalcohols and B4) optionally, one or more wetting agents common to lacquers, a homogenization by the shearing action taking place either in the entire component B) or initially in the component B1) with subsequent addition of the components B2), B3) and optionally B4), whereupon 0.4 to 1.5 parts by weight of the homogenized mixture of the components A) and B) are incorporated into C) one part by weight of an aqueous lacquer concentrate based on an aqueous binder dispersion with a minimum film-forming temperature below 10 DEG C. and a solids content exceeding 40% by weight. The coatings obtained in this way can be used in particular in the motor vehicle sector, as underseal for example.
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