Abstract: An improved method of forming a pigmented powder coating composition of the kind wherein the constituents are melt-extruded and the solidified extrudate then ground into a powder is provided. In the improved method, the non-pigment constituents are introduced into a melt-extruder and a pigment dispersion is simultaneously introduced into the extruder at a point downstream of the introduction of the non-pigment constituents. Powder coatings produced by this improved method display enhanced appearance and gloss.

Abstract: A powder coating composition of powder particles having a size range of about 1-100 microns in which the powder particles are a blend ofA. a polyvinyl chloride terpolymer of vinyl chloride/vinyl acetate/maleic acid andB. a polymer of ethylene/vinyl acetate/carbon monoxide;The powder can contain in addition to the above polymers a heat stabilizer such as a organometallic mercaptide, an epoxy resin, pigments, plasticizers, ultraviolet light-absorbing agents, polyethylene wax and a hard polymer such as an acrylic polymer; the powder coating composition is useful as a finish for metals such as tubing, wires, fence posts, lawn furniture, play equipment and the like.