Multilayer-coated powder

C - Chemistry – Metallurgy – 09 – C

Patent

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C09C 3/06 (2006.01) B22F 1/02 (2006.01) C03C 12/00 (2006.01) C03C 12/02 (2006.01) C03C 17/34 (2006.01) C23C 26/00 (2006.01) C23C 28/00 (2006.01) C23C 28/04 (2006.01) G03G 9/083 (2006.01)

Patent

CA 2258110

A powder comprising a base particle which has been colored desirably and vividly and having a high light transmittance in the visible region. The powder is a multilayer-coated powder comprising a base particle having thereon a multilayered film comprising at least one thin layer comprising a metal sulfide, a metal fluoride, a metal carbonate or a metal phosphate. This multilayered film reflects or absorbs the light having a specific wavelength according to the thickness thereof, the sequence of layer superposition, etc.

Poudre composée d'une particule de base fortement colorée dans une couleur souhaitée et possédant une perméabilité élevée à la lumière visible. Cette poudre est caractérisée par le fait qu'elle contient une particule de base et un revêtement composé de couches multiples recouvrant la particule de base et comprenant au moins une couche mince d'un sulfure de métal, d'un fluorure de métal, d'un carbonate de métal ou d'un phosphate de métal. Ce revêtement à couches multiples réfléchit ou absorbe la lumière d'une longueur d'onde particulière en fonction de son épaisseur ou, par exemple, de l'ordre des stratifications.

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