Magnetic fluid

Details Magnetic fluid Magnetic fluid

H - Electricity

01

F

31/106

H01F 1/28 (2006.01) H01F 1/44 (2006.01)

Patent

CA 1168855

ABSTRACT OF THE DISCLOSURE A magnetic fluid comprises a mixture of a mag- netic dispersion prepared by dispersing magnetic fine par- ticles into an organic dispersion medium by the aid of a surfactant and a colorant prepared by pretreating a color- ing material with a solubilizing treating agent or a dis- persibilizing treating agent comprising a hydrophobic group and a functional group adsorbable or linkable to the coloring material. The hydrophobic group comprises alkyl, cycloalkyl, alkenyl or aralkyl and the functional group comprises carboxyl, carboxylic bromide, sulfonic acid, sulfonyl chloride, primary amino, secondary amino or phenyl.

392455

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