| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the toner binder composition superior in image forming performance and in MFT (a fixation lower limit temperature) and HOT (an offset occurrence temperature) lower than the conventional ones. SOLUTION: This toner binder composition comprises a copolymer (A) having essential structural units: a monomer having a reactive functional group (a), a styrene type monomer and a conjugated diene hydrocarbon, and a compound (B) having a group reactive with (a), and a styrene type polymer (C), and (C) has a peak in 2,000-30,000 measured by the gel permeation chromatography, (A) is produced by solvent polymerization, and (A) a tetrahydrofuran-soluble fraction has a weight average molecular weight of 50,000-2,000,000.</p> |
