Finely divided iron oxide black pigments, a process for...

Details Finely divided iron oxide black pigments, a process for... Finely divided iron oxide black pigments, a process for...

C - Chemistry, Metallurgy

09

C

241/135, 6/210

C09C 1/24 (2006.01) C08K 3/22 (2006.01) C09D 7/00 (2006.01)

Patent

CA 1302999

FINELY DIVIDED IRON OXIDE BLACK PIGMENTS, A PROCESS FOR THEIR PREPARATION AND THEIR USE ABSTRACT OF THE DISCLOSURE Iron oxide black pigments useful as coloring pigments for lacquers and plastics are prepared by an improved process wherein finely divided iron oxide black suspensions obtained from the precipitation processor the aniline process are filtered, washed, dried and ground with the improvement in the process comprising grinding the dried iron oxide pigment in a jet mill with air as the grinding medium and with a water content of from about 1 to 6% by weight based on the iron oxide black pigment input to the process. Le A 25 561

579559

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