Magnetic composite particles, magnetic carrier and developer
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United States of America Patent
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Oct 7, 2014
Grant Date -
Mar 15, 2012
app pub date -
Mar 24, 2010
filing date -
Mar 31, 2009
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Abstract
The present invention relates to magnetic composite particles comprising at least magnetic fine particles and a bio-based polymer, wherein the magnetic composite particles have an average particle diameter of 10 to 100 μm, and a content of the magnetic fine particles in the magnetic composite particles is 50 to 99.9% by weight; a magnetic carrier; and a developer. The magnetic composite particles, magnetic carrier and developer according to the present invention are effective for reduction of environmental burden such as saving of underground sources and prevention of global warming, have a high safety for human bodies and a high durability, and are capable of forming developed images with a high quality.
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