Tantalum(v) nitride pigment

Details Tantalum(v) nitride pigment Tantalum(v) nitride pigment

C - Chemistry, Metallurgy

01

B

C01B 21/06 (2006.01) C01G 35/00 (2006.01) C08K 3/28 (2006.01) C09C 1/00 (2006.01) C09D 1/00 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2292371

The invention relates to tantalum(V) nitride pigments with improved colour values compared with predisclosed products, a process for producing such pigments, and their use. According to a preferred embodiment of the invention, pigments having an a* colour value in the CIE Lab system of equal to or greater than 45 are obtainable by aftertreating a tantalum(V) nitride (produced in a known manner) in a salt melt at 100 to 600°C for a period of 1 to 100 minutes. Preferably, the aftertreatment is carried out in an alkali-metal nitrate melt. The pigments can be used to colour plastics and paints, and also enamel, glass and porcelain decorations.

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