公开(公告)号：US6120967A

公开(公告)日：2000-09-19

申请号：US487598

申请日：2000-01-19

申请人： Michael A. Hopper ,  Raj D. Patel ,  Lori Ann Rettinger ,  Tanya Jane Martin

发明人： Michael A. Hopper ,  Raj D. Patel ,  Lori Ann Rettinger ,  Tanya Jane Martin

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/0819 ,  G03G9/0804 ,  G03G9/0825

摘要： A process for the preparation of a toner composition includes (i) forming a resin latex dispersion of a resin in an aqueous ionic surfactant solution from a latex utilizing an ionic surfactant and optionally a nonionic surfactant; (ii) preparing a pigment dispersion in water of a pigment dispersed in water and a nonionic dispersant, and optionally an ionic surfactant of the same polarity as that employed in preparing the resin latex dispersion of step (i); (iii) blending at least a portion of the resin latex dispersion with the pigment dispersion, and optionally a wax dispersion, to form a resin-pigment blend; (iv) adding a portion of a counterionic coagulant in an aqueous solution to the resin-pigment blend, while continuously subjecting the mixture to high shear, to induce a homogeneous gel of the resin-pigment blend, wherein the amount of the counterionic coagulant added is 25 to 90% by weight of a total amount of counterionic coagulant to be added during the process; (v) heating the sheared gel at temperatures below a glass transition temperature (Tg) of the resin while continuously stirring to form aggregate particles; (vi) following a period of time to permit stabilization of aggregate particle size, adding a remaining portion of the total amount of counterionic coagulant to be added during the process in one or more sequenced stages; (vii) adding any remaining portion of the resin latex dispersion; (viii) changing the pH with a base in order to stabilize the aggregates; and (ix) heating the aggregate particles at temperatures above the Tg of the resin followed by reduction of the pH with an acid to form coalesced particles of a toner composition.

摘要翻译： 制备调色剂组合物的方法包括：（i）使用离子表面活性剂和任选的非离子表面活性剂，由胶乳形成树脂在离子表面活性剂水溶液中的树脂胶乳分散体; （ii）在分散在水中的颜料的水中制备颜料分散体和非离子分散剂，以及任选的与制备步骤（i）的树脂胶乳分散体相同极性的离子表面活性剂; （iii）将至少一部分树脂胶乳分散体与颜料分散体和任选的蜡分散体共混以形成树脂 - 颜料混合物; （iv）将一部分抗衡离子凝结剂加入到树脂 - 颜料混合物中，同时连续地对混合物进行高剪切，以引起树脂 - 颜料混合物的均匀凝胶，其中加入的抗衡离子凝结剂的量 在该方法中加入的抗衡凝血剂总量的25〜90重量％ （v）在低于树脂的玻璃化转变温度（Tg）的温度下加热剪切的凝胶，同时连续搅拌以形成聚集体颗粒; （vi）经过一段时间以允许骨料粒度的稳定化，在一个或多个测序阶段加入待加入的抗衡离子凝结剂总量的剩余部分; （vii）添加任何剩余部分的树脂胶乳分散体; （viii）用碱改变pH以稳定聚集体; 和（ix）在高于树脂的Tg的温度下加热聚集体颗粒，然后用酸降低pH，以形成调色剂组合物的聚结颗粒。