PROCESS FOR PRODUCING DISPERSION POWDERS

摘要

The invention provides a process for producing dispersion powders by means of spray drying of aqueous polymer dispersions and addition of antiblocking agents in a rotary atomization dryer characterized in that the antiblocking agent is conveyed by means of delivery air wholly or partly into an annular gap which is formed by a moulding arranged concentrically around the housing of the rotary atomizer and which ends at a distance above the upper edge of the atomizer plate of the rotary atomizer.