Magnetic toner and process for producing magnetic toner

Details Magnetic toner and process for producing magnetic toner Magnetic toner and process for producing magnetic toner

G - Physics

03

G

G03G 9/087 (2006.01) G03G 9/097 (2006.01)

Patent

CA 2071457

A magnetic toner which is excellent in the low temperature fixability and the anti-offset properties is disclosed. The binder resin of the tong comprises a non-crosslinked styrene polymer, a non-crosslinked styrene copolymer or a mixture of these, and a polyolefin, wherein; the binder resin has, in its molecular weight distribution pattern measured by gel permeation chromatography (GPC), at least one maximal point (peak) in each region of a low molecular weight of from 5,000 to 20,000 and of a high molecular weight of from 200,000 to 1,000,000, where a height H1 of a maximum peak in the low molecular weight region, a height H3 of a maximum peak in the high molecular weight region and a height H2 of a minimal point between both of said peaks satisfy the relationship H1:H2:H3 of 3 - 25 : 1 : 1.5 - 12; and has a weight average molecular weight Mw and a number average molecular weight Mn in a value Mw/Mn of from 15 to 80.

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