PREPARATION OF MAGNETIC POLYMER PARTICLE
PURPOSE:To obtain the titled particles having particle diameters larger than that of fine particles of magnetic material and narrow particle diameter distribution, by dispersing fine particles of magnetic material which are magnetized and subjected to hydrophobic treatment into a monomer to give a p...
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| creator | INOUE SATOKI HATSUTORI MASAYUKI ASAEDA SHINJI OSHIMA KAZUO |
| description | PURPOSE:To obtain the titled particles having particle diameters larger than that of fine particles of magnetic material and narrow particle diameter distribution, by dispersing fine particles of magnetic material which are magnetized and subjected to hydrophobic treatment into a monomer to give a polymer composition containing the monomer, stirring the composition in the presence of an agent for protecting suspension in an aqueous medium to give particles having specific diameters, carrying out suspension polymerization. CONSTITUTION:Fine particles (e.g., triiron tetroxide, etc. having preferably 0.02-0.1mum particle diameter) which are magnetized and subjected to hydrophobic treatment are dispersed into a monomer (preferably styrene) to give a polymer composition, which is vigorously stirred in the presence of both an agent for protecting suspension (e.g., polyvinyl alcohol, etc.) and a polymerization initiator (e.g., benzoyl oxide, etc.) in an aqueous medium, to give particles having |
| format | Patent |
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CONSTITUTION:Fine particles (e.g., triiron tetroxide, etc. having preferably 0.02-0.1mum particle diameter) which are magnetized and subjected to hydrophobic treatment are dispersed into a monomer (preferably styrene) to give a polymer composition, which is vigorously stirred in the presence of both an agent for protecting suspension (e.g., polyvinyl alcohol, etc.) and a polymerization initiator (e.g., benzoyl oxide, etc.) in an aqueous medium, to give particles having <=5mum, preferably 1-4mum particle diameter, which are subjected to suspension polymerization with mild stirring under heating. 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CONSTITUTION:Fine particles (e.g., triiron tetroxide, etc. having preferably 0.02-0.1mum particle diameter) which are magnetized and subjected to hydrophobic treatment are dispersed into a monomer (preferably styrene) to give a polymer composition, which is vigorously stirred in the presence of both an agent for protecting suspension (e.g., polyvinyl alcohol, etc.) and a polymerization initiator (e.g., benzoyl oxide, etc.) in an aqueous medium, to give particles having <=5mum, preferably 1-4mum particle diameter, which are subjected to suspension polymerization with mild stirring under heating. 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CONSTITUTION:Fine particles (e.g., triiron tetroxide, etc. having preferably 0.02-0.1mum particle diameter) which are magnetized and subjected to hydrophobic treatment are dispersed into a monomer (preferably styrene) to give a polymer composition, which is vigorously stirred in the presence of both an agent for protecting suspension (e.g., polyvinyl alcohol, etc.) and a polymerization initiator (e.g., benzoyl oxide, etc.) in an aqueous medium, to give particles having <=5mum, preferably 1-4mum particle diameter, which are subjected to suspension polymerization with mild stirring under heating. USE:A toner for electrostatic development, coating compound, etc.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY CINEMATOGRAPHY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MAGNETOGRAPHY METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHOTOGRAPHY PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS |
| title | PREPARATION OF MAGNETIC POLYMER PARTICLE |
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