Maro Publications

Magnetic Materials

Patent Abstracts

from 8/16/2013

Maro Topics


Patents with Abstracts

4. 8,277,690 
Conducting copolymer ferromagnetic composite and a process for the preparation thereof
Dhawan et al of the Council of Scientific & Industrial Research, India, produced a conducting and magnetic copolymer ferromagnetic composite by in-situ polymerization with ferrite particles such as a copolymer of aniline and ethylene-dioxy thiophene containing ferrite particles. The present invention also provides insitu polymerization of aniline and ethylene-dioxy thiophene in the presence of ferrite particles and suitable surfactant medium. This conducting copolymer ferromagnetic composite can be used for the dissipation of electrostatic charge, for the shielding of electromagnetic interference and as absorbing of electromagnetic waves in the microwave region. (RDC 10/4/2012)

3. 8,277,679 
Composite magnetic material and magnetic element
Nakamura and Watanabe of Sumida Corporation, Japan, formed a magnetic composite with well-balanced magnetic and chemical properties.consisting of an epoxy binder and a magnetic powder containing 0.25 to 3 wt % Mn, 1 to 7 wt % Si, 2 to 8 wt % Cr, and the rest Fe.  5% of the powder particles having the major/minor axis greater than 2. (RDC 10/4/2012)

2. 8,277,678 
Polymer-bonded magnetic materials
Cheng et al of the Hong Kong Polytechnic University, China, formed a magnetic material for power conversion by mixing Fe2O3, NiO and ZnO into a mixture in a high-speed blender, crushing the mixture in a high-speed blender into magnetic powders, mixing dried PMMA pellets with Stearic acid (C18H36O2) in a high-speed blender to form polymer powders with appropriate size, and mixing the magnetic powders and the polymer powders in a high-speed blender. (RDC 10/4/2012)

1. 8,241,517 
Nanostructured magnetorheological polymer fluids and gels
Fuchs et al of the University of Nevada, Nevada, developed a magnetorheological material with a supramolecular polymer gel.  Useful supramolecular polymers for gels include those having bipyridine or terpyridine ligands which can participate in metal coordination bonding. The magnetizable particles of magnetorheological materials can have supramolecular surfactant-polymer coatings.  (RDC 8/16/2012)


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(RDC 6/5/2012)


Roger D. Corneliussen

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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 8/16/2012.