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    • 24. 发明申请
    • TONER USING RESIN INSOLUBLE IN ORGANIC SOLVENTS AND PREPARATION METHOD THEREOF
    • 在有机溶剂中使用树脂不溶剂的调色剂及其制备方法
    • WO2009145425A3
    • 2010-01-21
    • PCT/KR2009001547
    • 2009-03-26
    • SAMSUNG FINE CHEMICALS CO LTDAHN DUCK-KYUNYANG WOO-YOUNGKIM KEON-ILHWANG DAE-ILKIM IL HYUKPARK JAE-BUMHWANG IL-SUNHWANG JAE-KWANGCHOI DAE WOONGKIM DONG-WON
    • AHN DUCK-KYUNYANG WOO-YOUNGKIM KEON-ILHWANG DAE-ILKIM IL HYUKPARK JAE-BUMHWANG IL-SUNHWANG JAE-KWANGCHOI DAE WOONGKIM DONG-WON
    • G03G9/08
    • G03G9/0806G03G9/0821G03G9/08704G03G9/08755G03G9/08791G03G9/08793G03G9/08795G03G9/08797
    • The present invention relates to a toner using a resin insoluble in organic solvents and a preparation method thereof. The disclosed method comprises: (a) dry-milling the insoluble resin to prepare microparticles or wet-dispersing the insoluble resin to prepare a fine suspension; (b) mixing a resin containing an acid group, a colorant, and at least one additive in the organic solvent and then dissolving the mixture to prepare a toner solution; (c) adding the insoluble resin microparticles or the fine suspension into the toner solution to prepare an insoluble resin-toner solution; (d) adding the insoluble resin-toner solution into a dispersion medium to prepare a fine toner suspension; and (e) removing the organic solvent from the fine toner suspension. The insoluble resin is a crosslinkable polystyrene resin or cycloolefin resin. The weight ratio of the insoluble resin to the resin having the acid group is 5:95 to 40:60. Accordingly, the method can prevent hot offset due to the wide fixing temperature of the toner. Also, the method can improve both static stability according to environmental changes and durability of the toner at a high temperature. Additionally, the disclosed toner can be applied to an electrophotographic-imaging apparatus.
    • 本发明涉及使用不溶于有机溶剂的树脂的调色剂及其制备方法。 所公开的方法包括:(a)干式研磨不溶性树脂以制备微粒或湿分散不溶性树脂以制备细小悬浮液; (b)在有机溶剂中混合含有酸基,着色剂和至少一种添加剂的树脂,然后将该混合物溶解以制备调色剂溶液; (c)将不溶性树脂微粒或细悬浮液加入到调色剂溶液中以制备不溶性树脂调色剂溶液; (d)将不溶性树脂调色剂溶液加入到分散介质中以制备细调色剂悬浮液; 和(e)从细调色剂悬浮液中除去有机溶剂。 不溶性树脂是可交联聚苯乙烯树脂或环烯烃树脂。 不溶性树脂与具有酸基的树脂的重量比为5:95〜40:60。 因此,该方法可以防止由于调色剂的宽定影温度引起的热偏移。 此外,该方法可以根据环境变化和高温下调色剂的耐久性改善静电稳定性。 另外,所公开的调色剂可以应用于电子照相成像设备。
    • 30. 发明申请
    • METHOD OF PREPARING TONER
    • 制备碳粉的方法
    • WO2009038404A3
    • 2009-05-22
    • PCT/KR2008005584
    • 2008-09-19
    • SAMSUNG FINE CHEMICALS CO LTDYANG WOO YOUNGKIM KEON ILHWANG DAE ILKIM IL HYUKPARK JAE BUMHWANG IL SUNHWANG JAE KWANGCHOI DAE WOONGKIM DONG WONAHN DUCK KYUN
    • YANG WOO YOUNGKIM KEON ILHWANG DAE ILKIM IL HYUKPARK JAE BUMHWANG IL SUNHWANG JAE KWANGCHOI DAE WOONGKIM DONG WONAHN DUCK KYUN
    • G03G9/08
    • G03G9/0806G03G9/0819G03G9/0827
    • Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed. Unlike a conventional method of preparing a toner, wherein toner components are first dissolved in an organic solvent and then dispersed in an aqueous phase, the method prepares toner particles by forming a solvent emulsion and then adding toner components in the solvent emulsion and dissolving the toner components in the organic solvent dispersed in the solvent emulsion. By controlling an order of adding the toner components, it is easy to control a structure of the toner. Accordingly, a toner having a small volume average particle size, a narrow particle size distribution, an improved fixing property, and an improved storage stability at a high temperature is prepared. Also, it is easy to adjust toner surface charges by selectively using the pigment in a form of a master batch and encapsulating the pigment.
    • 提供一种调色剂的制备方法,所述方法包括:通过搅拌包含极性介质,有机溶剂和表面活性剂的介质来制备溶剂乳液; 将包括树脂和颜料的调色剂组分添加到溶剂乳液中; 从包含调色剂组分的溶剂乳液中除去有机溶剂; 并从除去有机溶剂的溶剂乳液中收集调色剂颗粒。 与制备调色剂的常规方法不同,其中调色剂组分首先溶解在有机溶剂中,然后分散在水相中,该方法通过形成溶剂乳液然后在溶剂乳液中加入调色剂组分并溶解调色剂来制备调色剂颗粒 分散在溶剂乳液中的有机溶剂中的组分。 通过控制添加调色剂组分的顺序,容易控制调色剂的结构。 因此,制备了具有小体积平均粒径,窄粒度分布,改善的定影性和在高温下改进的贮存稳定性的调色剂。 另外,通过选择性地使用母料形式的颜料并包封颜料,调节调色剂表面电荷是容易的。