Releasing composition and binder resin composition for electrophotographic toner, and toner containing the same

摘要

A releasing composition for an electrophotographic toner, which comprises 60 DIFFERENCE 99.5% by weight of a low molecular weight polypropylene (A), and 0.5 DIFFERENCE 40% by weight of at least one modified polyolefin (B) selected from the group consisting of (B1) a modified polypropylene comprising a low molecular weight polypropylene (a1) having a melt viscosity at 160 DEG C. higher than that of said polypropylene (A), modified with an ethylenically unsaturated carboxylic acid or an anhydride thereof (b1), and (B2) a modified polyethylene comprising a low molecular weight polyethylene (a2) having a melt viscosity of 10 DIFFERENCE 8,000 cps at 140 DEG C., modified with an ethylenically unsaturated carboxylic acid or an anhydride thereof (b2). A toner prepared from a combination of the releasing composition and a thermoplastic binder resin exhibits improved flowability without reducing the offset temperature of the toner.