C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/03 (2006.01)
Patent
CA 2367249
The invention provides a powder coating composition in which powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles, wherein the individual particulate components comprise coloured film-forming base components having a Dv.99 of no more than 30µm, and one or more uncoloured film-forming components, at least one component (2a) having a Dv.99 that is more than 20µm and that is higher than the Dv.99 of the coloured components taken together, the ratio of coloured film-forming base component(s) to uncoloured film-forming component(s) in the composition being in the range of from 1:99 to 60:40 by weight. Maximising the amount of larger-sized uncoloured component(s) gives cost advantages, and the invention allows a rapid and flexible manufacture of a range of coloured powder coating compositions.
L'invention concerne une composition de revêtement en poudre dans laquelle les particules de poudre constituent un agglomérat de constituants particulaires individuels fondus ou liés de façon à former des particules composites. Les constituants particulaires individuels comprennent des constituants de base filmogènes colorés présentant un Dv.99 ne dépassant pas 30µm, et un ou plusieurs constituants filmogènes non colorés, au moins un constituant (2a) présentant un Dv.99 supérieur à 20µm et supérieur au Dv.99 des constituants colorés pris ensemble ; et le rapport du/des constituant(s) de base filmogène(s) coloré(s) sur le(s) constituant(s) filmogène(s) non colorés de la composition se situe dans la fourchette de 1:99 à 60:40 en poids. Le fait de maximiser la quantité de constituant(s) non colorés de dimensions supérieures est avantageux du point de vue du coût, et l'invention permet de fabriquer rapidement et de manière flexible une gamme de compositions de revêtement en poudre colorées.
Gowling Lafleur Henderson Llp
International Coatings Limited
LandOfFree
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