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2. 发明公开

EP0834779A1 PROCESS FOR PRODUCING TONER FOR DEVELOPING ELECTROSTATICALLY CHARGED IMAGES 失效
标题翻译： VERFAHREN ZUR HERSTELLUNG VON TONERNFÜRDIE ENTWICKLUNG ELEKTROSTATISCH GELADENER BILDER
公开(公告)号：EP0834779A1
公开(公告)日：1998-04-08
申请号：EP96918866.3
申请日：1996-06-20
申请人： NIPPON ZEON CO., LTD.
发明人： HASEGAWA, Jun , SAKAI, Jun , WATANABE, Makoto , YAMADA, Fumio , OGAWA, Tokudai
IPC分类号： G03G9/093
CPC分类号： G03G9/0806 , G03G9/09314 , G03G9/09335 , G03G9/09357 , G03G9/09378 , G03G9/09392
摘要： 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°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.
By this process, capsule type colored polymer particles of a core-shell structure composed of 40-99 wt.% of the core component and 1-60 wt.% of the shell component are produced.
摘要翻译：通过对至少含有可聚合单体和着色剂的单体组合物进行制备用于显影静电潜像用调色剂的方法，该调色剂由有色聚合物颗粒组成并具有低定影温度，通过OHP具有良好的透过性和优异的储存稳定性在含有分散剂的水性分散介质中进行悬浮聚合包括至少两个步骤：（1）将含有至少一种单体的核成分的单体组合物用于芯组分的第一步骤，其能够形成具有玻璃化转变温度不高于80℃，在水分散介质中悬浮聚合着色剂直至单体转化为聚合物达到至少80％，从而制备作为核心组分的着色聚合物颗粒; 和（2）第二步，添加至少一种能够形成玻璃化转变温度高于核心组分的聚合物的聚合物的壳组分的单体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，其含有作为核心成分的着色聚合物粒子的反应体系进行聚合反应，从而在作为壳聚合物的有机聚合物粒子的表面上形成作为壳组分的聚合物涂层的核心组成部分。通过该方法，制备由核成分的40-99重量％和壳组分的1-60重量％组成的核 - 壳结构的胶囊型着色聚合物颗粒。

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