| 摘要 |
PURPOSE:To improve separability from a resin component and to improve thermal stability by compounding the thiourea deriv. expressed by the specific chemical formula as an electric charge controlling agent with a resin component thereby preparing a toner for electrostatic charge image development. CONSTITUTION:The thiourea deriv. expressed by the formula (R1, R2, R3, R4 denote hydrogen an alkyl group 1-6C and phenyl group) is compounded as the charge controlling agent at about 0.1-10pts.wt.with 100pts.wt. resin such as styrene resin, styrene-acrylic resin or styprene-butadiene resin by which the toner for electrostatic charge image development is prepd. The embodiment of the thiourea deriv. expressed by the formula includes thiourea, dimethylthiourea, phenylthiourea, 1,1-diphenylthiourea, etc. A coloring agent such as benzidine yellow or quinacridone is adequately used in the case of a color toner. |
