| 摘要 |
<p>PURPOSE:To provide an electrophotographic developer which enables fast fixing, has excellent offset resistance, and causes no drum filming nor carrier filming of a toner by sticking a wax having specified heat of fusion and glass transition temp. to the surface of the toner. CONSTITUTION:A wax having <=15 cal/g heat of fusion and 55-70 deg.C glass transition temp. is made to stick to the surface of a toner. This wax is a polyolefin having 110-190 deg.C softening point and <=2mum average particle diameter. As for the toner binder resin, an epoxy resin, styrene-acrylate copolymer, polyester resin, and polyurethane resin are used. It is preferable that the resin has 80-130 deg.C softening point. Further, a gold-contg. dye, fatty acid ester, or compd. containing an amino group may be added as a charge controlling agent.</p> |
