| 摘要 |
<p>A powder coating composition of the invention comprises a film-forming polymeric component having a d(v,50) in the range or from 25 to 50 microns or a d(v,70) in the range of from 25 to 70 microns, which composition incorporates by dry-blending at least one appearance-modifying additive component and a further component comprising wax-coated silica or consisting of alumina together with aluminum hydroxide. The appearance-modifying additive may be a gloss-reducing component, a texturing component, a metallic or mica component, a coloring pigment, or a further film-forming polymeric material comparable with the first film-forming polymeric material and differing in coloration therefrom, and the further additive may be alumina together with aluminum hydroxide, wax-coated silica, or a combination thereof. Preferably, no more than 70% by volume of the particles in the film-forming polymeric material are less than 50 microns. A kit of the invention comprises the individual additive components prior to mixing. The kit allows for the flexible production of a variety of finishes from a gloss powder coating composition, for example, a matte, textured, metallic, or sparkle finish, a matte metallic finish, an antique finish, or a contrast texture or metallic sparkle finish.</p> |
