Aqueous powder paint slurry, useful for the coating of motor vehicle bodies, comprises a hydroxyl group binding agent and a polyisocyanate crosslinking agent with stabilized surface isocyanate groups.

摘要

A powder paint slurry comprises a hydroxyl group binding agent, a polyisocyanate cross-linking agent and water whereby isocyanate groups on the surface of the particles are stabilized by a deactivating agent. A powder paint slurry (I), preferably a clear lacquer powder slurry contains (A) a hydroxyl group containing binding agent, (B) a polyisocyanate cross-linking agent and water. (A) and (B) are homogenized such that no less than 30(60), preferably 90 wt.% of (B) is dispersed or dissolved in (A). Isocyanate groups on the surface of particles of (B) and (A) containing (B) are stabilized by means of a deactivating agent added to the aqueous phase. Independent claims are included for a process for the production of (I) by homogenization of (A) and (B), grinding of the resulting mixture and wet grinding of the resulting powder to an average particle size of less than 10 microns.