Magnetic toner for developing electrostatic images

Details Magnetic toner for developing electrostatic images Magnetic toner for developing electrostatic images

G - Physics

03

G

96/51

G03G 9/08 (2006.01) G03G 9/083 (2006.01) G03G 9/087 (2006.01)

Patent

CA 1326154

ABSTRACT OF THE DISCLOSURE A magnetic toner for developing electrostatic images, comprising at least a binder resin and a magnetic powder; the binder resin having 10 to 70 wt. of a THF (tetrahydrofuran)-insoluble and a THF-soluble, the THF-soluble providing a molecular weight distribution in the chromatogram of GPC (gel permeation chromatography) thereof such that it provides a rate (Mw/Mn) of weight-average molecular weight (Mw)/number- average molecular weight (Mn) ? 5, there are a peak in the molecular weight range of 2,000 to 10,000 and a peak or shoulder in the molecular weight range of 15,000 to 100,000, and a component having a molecular weight of 10,000 or smaller is contained in an amount of 10 - 50 wt based on the binder resin; the magnetic powder comprising spherical magnetic particles having a bulk density of 0.6 g/ml or larger.

592032

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