| abstract |
A process for the preparation of aqueous, oxidatively drying alkyd resins with a solids content of more than 40% by weight, in which an alkyd resin prepared from selected starting materials with a hydroxyl number of 100 to 200 and an acid number of at most 5 with a 2,2-bis (hydroxymethyl) alkane carboxylic acid and 10 to 23 wt .-% of a diisocyanate component in a highly concentrated solution in the presence of 0.01 to 2.5 wt .-% of suitable catalysts and then the resulting isocyanate group-free reaction product is dispersed or dissolved in water, the 45 to 100% of the carboxyl groups present during the reaction or during the dispersing or dissolving step are neutralized, and the use of the aqueous binders thus obtainable in or as aqueous lacquers or coating compositions which dry oxidatively at room temperature. |