Multilayer interference pigments

Details Multilayer interference pigments Multilayer interference pigments

C - Chemistry, Metallurgy

09

C

C09C 3/06 (2006.01) C03C 4/02 (2006.01) C03C 17/34 (2006.01) C04B 33/14 (2006.01) C08K 9/02 (2006.01) C09C 1/00 (2006.01) C09D 5/36 (2006.01) C09D 7/12 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2238035

Multilayered interference pigments are composed of a transparent substrate material coated with alternating layers of metal oxides with low and high refraction indexes. The layers of metal oxide with a low refraction index are optically inactive. The thickness of the layers of metal oxide with a high refraction index is an integral multiple of the optical thickness required to obtain the desired interference colour. The thickness of the layers of metal oxide with a low refraction index is comprised between 1 and 20 nm.

L'invention concerne des pigments d'interférence multicouches constitués d'un support transparent revêtu de couches alternantes d'oxydes métalliques à indice de réfraction faible et élevé, les couches des oxydes métalliques à faible indice de réfraction étant optiquement inactives. L'épaisseur des couches d'oxydes métalliques à indice de réfraction élevé est un multiple entier de l'épaisseur optique qui est nécessaire pour la couleur d'interférence souhaitée. L'épaisseur des couches d'oxydes métalliques à faible indice de réfraction atteint 1 à 20 nm.

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