| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a resin composition for toner excellent in fixability, anti- offsetting property, blocking resistance, image reproducibility, filming resistance and durability in development. SOLUTION: This resin composition comprises a copolymer (A) having one or more selected from a styrene monomer, a (meth)acrylic ester monomer and a (meth)acrylic acid monomer as constituent units and having 45-75 deg.C glass transition temperature (Tg), a weight average molecular weight (Mw) of >=100,000, an Mw to number average molecular weight (Mn) ratio of 15-100 and at least one maximum value or shoulder in the molecular weight range of 3,000-12,000 and in the molecular weight range of >=100,000, a copolymer (B) having ethylene, carbon monoxide and a (meth)acrylic ester or a vinyl ester as constituent units and having -55 to -20 deg.C Tg and a melt index of 5-700 and a vegetable natural wax and/or a montan ester wax. The weight ratio among the three components is (98.7-79):(0.3-20):(1-20).</p> |
