Magnetic metal and alloy pigments

Details Magnetic metal and alloy pigments Magnetic metal and alloy pigments

C - Chemistry, Metallurgy

09

C

6/195

C09C 1/62 (2006.01) B22F 1/02 (2006.01) H01F 1/06 (2006.01)

Patent

CA 1148309

"Magnetic metal and alloy pigments" Abstract of the Disclosure A pigment of a magnetic metal or alloy thereof carrying, in about 0.2 to 30% of the weight of the metal or alloy, a coating of at least one member selected from the group consisting of an ortho-silicic acid ester, a hydrolyzate thereof and a condensation product thereof. Optionally it also carries a corrosion inhibitor. The coated pigment is produced by suspension of the untreated pigment in a liquid medium containing the ortho-silicic acid ester or derivative thereof, and optionally the corrosion inhibitor, followed by separation and drying at 50 to 250°C. The resulting pigment is non-pyrophoric and of high performance properties suitable for use in magnetic recording media. Le A 20 051

364365

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