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US 2010/0163777 A1Published application
Magnetic particles and process for their production
AssigneeCannon Kabushiki Kaisha
InventorKazumichi Nakahama
Life of this patent
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Abstract
Magnetic particles containing a magnetic material and a biodegradable polymeric compound; the magnetic particles having average particle diameter in the range of from 10 nm or more to 1,000 nm or less.
Claims17
Magnetic particles which comprise a magnetic material and a biodegradable polymeric compound;
- the magnetic particles having average particle diameter in the range of from 10 nm or more to 1,000 nm or less.
A process for producing magnetic particles which comprises the steps of:
- (1) preparing a liquid mixture containing a biodegradable polymeric compound, a magnetic material and a first solvent;
- (2) preparing an emulsion by mixing the liquid mixture with a second solvent;
- and
- (3) removing the first solvent from the emulsion by evaporation or extraction;
- the magnetic particles comprising the biodegradable polymeric compound and the magnetic material, having average particle diameter in the range of from 10 nm or more to 1,000 nm or less, and having a dispersibility index of 1.5 or less.
2 more elements
Dependencies are inferred from the claim text.