| 摘要 |
<p>A powder composition, comprises free radical curable epoxy resin(s) and second free radical curable resin(s), or, alternatively, free radical curable unsaturated polyester resin in combination with wax(es); free radical photoinitiator(s); and optionally, a thermal cure catalyst. The coating powder has an average particle size of 5-25 mu m. Independent claims are also included for: (a) making a coating having a low gloss finish, comprising disposing a layer of a powder composition onto a substrate; fusing the disposed powder composition with heat to form a powder coating; and curing the powder coating to achieve a gloss level of 1-50 on a 60[deg] Gardner Gloss scale; (b) a powder coated article; and (c) making a powder composition comprising forming an aqueous emulsion of the composition, followed by spray drying the emulsion to form a powder, extruding the composition in a supercritical fluid to form a supercritical suspension, followed by spray drying the supercritical suspension to form a powder, extruding the composition in a supercritical fluid in the presence of a cosolvent to form a supercritical suspension, followed by spray drying the supercritical suspension to form a powder, and, extruding the composition to form a fluid mixture, followed by spray drying the fluid mixture to form a powder.</p> |
