Patent ID: 7351509
Filing Date: 2008-04-01
Classification: G03G

Abstract:
1. A toner comprising: toner particles containing at least a binder resin, a hydrocarbon wax (a), a hydrocarbon wax (b) and a colorant, wherein; said binder resin contains a vinyl resin; said hydrocarbon wax (a) has a hydroxyl value of less than 5 mg·KOH/g and an ester value of less than 1 mg·KOH/g; said hydrocarbon wax (b) has a hydroxyl value Hv of 5 to 150 mg·KOH/g; a weight average molecular weight (Mw) of absolute molecular weights measured with a viscosity detector in high-temperature GPC-RALLS-viscometer analysis of o-dichlorobenzene-soluble matter of said toner is from 1.0×10 in said o-dichlorobenzene-soluble matter, a component having the absolute molecular weight of 10,000 or less is in a proportion of from 40% by weight to 90% by weight, and a component having the absolute molecular weight of 1,000,000 or more is less than 10% by weight; and said toner has an intrinsic viscosity of from 0.20 ml/g to 0.60 ml/g as measured with the viscosity detector.