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    • 37. 发明授权
    • Color toner
    • 彩色墨粉
    • US07112395B2
    • 2006-09-26
    • US10792712
    • 2004-03-05
    • Tetsuya IdaYasuhiro IchikawaHirohide TanikawaNozomu Komatsu
    • Tetsuya IdaYasuhiro IchikawaHirohide TanikawaNozomu Komatsu
    • G03G9/087
    • G03G9/08702G03G9/0819G03G9/0821G03G9/0827G03G9/08755
    • To provide a color toner which is effective in mitigating contamination of a charging member, which is good at low temperature fixing in high-speed copying, and which is excellent in blocking resistance and electrification stability in continuous copying. Provided is a color toner containing at least a binder resin, a colorant, and a releasing agent, in which: (i) the binder resin contains at least a polyester unit; (ii) a weight average particle diameter of the color toner is greater than 6.5 μm and equal to or less than 11 μm; (iii) an average circularity A of particles in the color toner each having a circle-equivalent diameter of 3 μm or more satisfies the relationship of 0.915≦A≦0.960; (iv) a permeability B (%) of the color toner in a 45 vol % aqueous solution of methanol satisfies the relationship of 10≦B≦70; and (v) an endothermic curve obtained through differential thermal analysis (DSC) measurement of the color toner has one or multiple endothermic peaks in the temperature range of 30 to 200° C., and a temperature Tsc of the highest endothermic peak of the one or multiple endothermic peaks satisfies the relationship of 65° C.
    • 提供一种有效地减轻高速复印中低温定影良好的充电部件的污染的彩色调色剂,并且在连续复印中的耐粘连性和带电稳定性优异。 提供了至少含有粘合剂树脂,着色剂和脱模剂的彩色调色剂,其中:(i)粘合剂树脂至少含有聚酯单元; (ii)彩色调色剂的重均粒径大于6.5μm且等于或小于11μm; (iii)各自具有3当量圆直径为3μm以上的彩色调色剂中的平均圆形度A满足0.915≤A<= 0.960的关系; (iv)在45体积%的甲醇水溶液中的彩色调色剂的渗透率B(%)满足10≤B≤70的关系; 和(v)通过彩色调色剂的差示热分析(DSC)测量获得的吸热曲线在30至200℃的温度范围内具有一个或多个吸热峰,并且一个最高吸热峰的温度Tsc 或多个吸热峰满足65℃的关系。
    • 40. 发明授权
    • Positively chargeable toner, image forming method and image forming apparatus
    • 可充电的调色剂,成像方法和图像形成装置
    • US06235441B1
    • 2001-05-22
    • US09465836
    • 1999-12-17
    • Hirohide TanikawaMasami FujimotoTakakuni KoboriHiroyuki Fujikawa
    • Hirohide TanikawaMasami FujimotoTakakuni KoboriHiroyuki Fujikawa
    • G03G900
    • G03G9/08793G03G9/08722G03G9/08726G03G9/0874G03G9/08791G03G9/08795G03G9/09758
    • A positively chargeable toner suitable to be carried on a cylindrical developer-carrying member having a resinous surface for developing an electrostatic latent image is formed from a composition including a binder resin, an imidazole compound and a colorant. The binder resin comprises at least one member selected from the group consisting of (i) a mixture of vinyl resin having a carboxyl group and a vinyl resin having a glycidyl group, (ii) a vinyl resin having both a carboxyl group and a glycidyl group, and (iii) a vinyl resin having a carboxyl group and a glycidyl group in a form reacted with each other. The imidazole compound is a compound having an imidazo unit represented by formula (1) below: wherein R1-R4 independently denote hydrogen or a substituent as specified. In some cases, two or more such imidazole units can be included in a combined form to provide the imidazole compound. The imidazole compound is effective for promoting a crosslinking reaction between the carboxyl group and the glycidyl group to provide the toner with improved fixability and anti-offset property in combination.
    • 由具有粘合剂树脂,咪唑化合物和着色剂的组合物形成适于承载在具有用于显影静电潜像的树脂表面的圆筒形显影剂承载构件上的可充正电的调色剂。 粘合剂树脂包括选自(i)具有羧基的乙烯基树脂和具有缩水甘油基的乙烯基树脂的混合物中的至少一种,(ii)具有羧基和缩水甘油基的乙烯基树脂 ,和(iii)具有相互反应形式的具有羧基和缩水甘油基的乙烯基树脂。 咪唑化合物是具有由下式(1)表示的咪唑单元的化合物:其中R 1 -R 4独立地表示氢或如所规定的取代基。 在一些情况下,两种或多种这样的咪唑单元可以以组合形式包括以提供咪唑化合物。 咪唑化合物对于促进羧基和缩水甘油基之间的交联反应是有效的,以提供具有改进的定影性和抗偏移性的组合的调色剂。