| 摘要 |
<p>PURPOSE:To obtain an electrophotographic toner resin suitable to a high-speed copying machine or low-heat fixing and copying machine, capable of being fixed with a low heat, with the fixing and offset property well-balanced, and excellent in toner strength. CONSTITUTION:The matrix resin consists of a mixed resin of an ethylenic polymer (H) having >=100,000 weight average mol.wt. (Mw) and with the ratio of the Mw to the number average mol.wt. (Mn) controlled to >=3.0 and an ethylenic polymer (L) having >=2,000-50,000Mw and a glass transition temp. (Tg) of 55-75 deg.C. The mixed resin includes internally cross-linked org. fine particles obtained by the polymerization in a water dispersion and having 0.05-2mum average diameter as a domain, the weight ratio of the org. fine particle to mixed resin is controlled to 10 to 200:100.</p> |
