Colorant composition

Details Colorant composition Colorant composition

C - Chemistry, Metallurgy

09

D

C09D 11/00 (2006.01) C09C 1/00 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2264281

A colorant composition capable of giving a coating film excellent in heat resistance and weather resistance which not only can have a single clear color, such as, blue, green, yellow, or the like, and be used for forgery prevention based on discrimination by means other than visible light rays, but also does not suffer color fading even at a high temperature of 350°C to 600°C. The colorant composition comprises at least a powder comprising a base particle coated with a multilayered film comprising layers differing from each other in refractive index to make the base particle have an interference color, wherein the powder is dispersed in a dispersion medium.

L'invention porte sur la composition d'une matière colorante conférant à un objet une belle couleur unie telle que le bleu, le vert ou le jaune, non susceptible d'être contrefaite, à l'aide de rayons de lumière autres que les rayons de lumière visibles, non décolorable entre 350 et 600 DEG C, et pouvant constituer un film résistant à la chaleur et aux intempéries. Ladite composition est revêtue d'un film multicouche de particules de substrat de différents indices de réfraction. Les corps pulvérisés auxquels une couleur interférentielle est donnée sont dispersés dans un milieu de dispersion.

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