Toner for developing electrostatic images, binder resin...

Details Toner for developing electrostatic images, binder resin... Toner for developing electrostatic images, binder resin...

G - Physics

03

G

96/52, 400/6401

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

Patent

CA 1302612

ABSTRACT OF THE DISCLOSURE A toner for developing electrostatic latent images with a good combination of fixability, anti- offset characteristic, anti-sticking characteristic and pulverizability is provided as a composition comprising a colorant or magnetic material and a binder resin. The binder resin has 0.1 to 60 wt.% of a chloroform-insoluble or 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 there are a main peak in the molecular weight range of 1,000 to 25,000 and a sub-peak or shoulder in the molecular weight range of 2,000 to 150,000. The binder resin may suitably be obtained through two polymerization steps including a solution poly- merization step and a suspension polymerization step.

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