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    • 1. 发明授权
    • Production process of toner for development of electrostatic latent image
    • 用于显影静电潜像的调色剂的生产工艺
    • US5952144A
    • 1999-09-14
    • US973906
    • 1997-12-18
    • Jun HasegawaJun SakaiMakoto WatanabeFumio YamadaTokudai Ogawa
    • Jun HasegawaJun SakaiMakoto WatanabeFumio YamadaTokudai Ogawa
    • G03G9/08G03G9/093
    • G03G9/0806G03G9/09392
    • A process for producing a toner for development of electrostatic latent images, which is composed of colored polymer particles and has a low fixing temperature, good permeability through OHP and excellent shelf stability, by subjecting a monomer composition containing at least a polymerizable monomer and a colorant to suspension polymerization in an aqueous dispersion medium containing a dispersing agent comprises at least two steps of:(1) the first step of subjecting a monomer composition for core component containing at least one monomer for core component, which is capable of forming a polymer having a glass transition temperature not higher than 80.degree. C., and a colorant to suspension polymerization in the aqueous dispersion medium until the conversion of the monomer into the polymer reaches at least 80%, thereby preparing colored polymer particles serving as the core component; and(2) the second step of adding at least one monomer for shell component, which is capable of forming a polymer having a glass transition temperature higher than that of the polymer of the core component, or a monomer composition for shell component containing said monomer, and a water-soluble radical initiator to the reaction system containing the colored polymer particles serving as the core component to conduct a polymerization reaction, thereby forming a coating layer of the polymer serving as the shell component on surfaces of the colored polymer particles serving as the core component.
    • PCT No.PCT / JP96 / 01714 Sec。 371 1997年12月18日第 102(e)1997年12月18日PCT PCT 1996年6月20日PCT公布。 第WO97 / 01131号公报 日期1997年1月9日由静电潜像显影用调色剂的制造方法,该静电潜像调色剂由有色聚合物颗粒构成,具有低定影温度,通过OHP具有良好的透过性和优异的储存稳定性, 可聚合单体和着色剂在含有分散剂的水分散介质中悬浮聚合包括至少两个步骤:(1)将含有至少一种单体的核心组分的单体组合物用于芯组分的第一步骤, 形成玻璃化转变温度不高于80℃的聚合物和着色剂在水性分散介质中进行悬浮聚合,直到单体转化为聚合物达到至少80%,从而制备着色聚合物颗粒,其用作 核心部件; 和(2)添加至少一种壳组分的单体的第二步骤,其能够形成玻璃化转变温度高于芯组分的聚合物的聚合物,或含有所述单体的壳组分的单体组合物 和水溶性自由基引发剂,其含有作为核成分的着色聚合物粒子的反应体系进行聚合反应,从而在着色聚合物粒子的表面形成作为壳组分的聚合物的被覆层,作为 的核心组成部分。