Blue shade fe-cr black

C - Chemistry – Metallurgy – 09 – C

Patent

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Details

C09C 1/22 (2006.01) C01G 49/00 (2006.01) C09C 1/24 (2006.01) C09C 1/34 (2006.01)

Patent

CA 2424223

One aspect of the invention relates to a blue shade black pigment composition, containing at least iron oxide, chrome oxide, wherein the ratio of iron to chromium is from about 1:1 to about 5:1 by weight; and manganese oxide. Another aspect of the invention relates to a method of making a blue shade black pigment involving combining iron oxide, chrome oxide, and manganese oxide to form a mixture; heating the mixture to a temperature from about 700 ~C to about 1,300 ~C for a time from about 1 to about 5 hours; and optionally agitating the heated mixture to provide the blue shade black pigment. Yet another aspect of the invention relates to a plastic composition containing a plastic material and a blue shade black pigment composition containing at least iron oxide, chrome oxide, and manganese oxide.

L'invention concerne, dans l'un de ses aspects, une composition de pigments noirs de teinte bleutée contenant au moins un oxyde de fer, un oxyde de chrome, le rapport entre le fer et le chrome étant compris entre 1/1 et environ 5/1 en poids, ainsi qu'un oxyde de manganèse. L'invention concerne également, dans un autre de ses aspects, un procédé de fabrication d'un pigment noir de teinte bleutée, ce procédé consistant à combiner un oxyde de fer, un oxyde de chrome et un oxyde de manganèse, afin de former un mélange, à chauffer ce mélange pour le porter à une température comprise entre environ 700 et environ 1300 ·C, pendant une durée comprise entre 1 et 5 heures environ, puis, le cas échéant, à agiter le mélange chauffé afin de produire le pigment noir de teinte bleutée. Dans un encore autre aspect, l'invention concerne une composition de plastique contenant une matière plastique ainsi qu'une composition de pigments noirs de teinte bleutée contenant au moins un oxyde de fer, un oxyde de chrome et un oxyde de manganèse.

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