Process for preparation of thermosetting resin powder paints

A process for the production of thermosetting resin powder paints which consists of the steps (1) melting and kneading a thermosetting resinous composition which contains curing agents at a temperature higher than the softening point but lower than the curing point of the resinous composition, extruding said thermosetting resinous composition for a powder paint in the molten state from an extruder die, at temperature between 90.degree. C and 140.degree. C, at a rate between 100 and 600 kg/hr. (2) continuously cooling the extruded composition and forming it into a sheet under conditions to avoid curing of the resin by means of a plurality of rolls including press rolls for rolling the composition into a sheet, cooling feed rolls and withdrawal take-up rolls disposed in this order, applying air from air blasting nozzles, which nozzles are opened to face the entire surfaces of the cooling feed rolls, at a distance from the cooling feed rolls of between 20 and 150mm, at an air rate of at least 30m/sec, at a pressure of between 1.5 and4kg/cm.sup.2 while controlling the sheet temperature at the terminal portion of the withdrawal take-up rolls between room temperature and 50.degree. C, and (3) pulverizing the so formed sheet.