Toner for electrophotography and method for forming image using the same
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United States of America Patent
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May 27, 2008
Grant Date -
Dec 8, 2005
app pub date -
Sep 18, 2003
filing date -
Sep 30, 2002
priority date (Note) -
Expired
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Abstract
An electrophotographic toner used for an image forming method that utilizes a heat-pressure type fuser equipped with a fusing member having a surface layer containing polybenzimidazole, wherein the toner comprises at least cycloolefin copolymer resins as binder resins. The cycloolefin copolymer resins comprise a mixture of 0 to 75 percent by weight of a low molecular weight component having a weight-average molecular weight of less than 15000, 5 to 25 percent by weight of a medium molecular weight component having a weight-average molecular weight of 15000 to 100000, and 20 to 95 percent by weight of a high molecular weight component having a weight-average molecular weight of more than 100000.
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