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公开(公告)号：US06294595B1
公开(公告)日：2001-09-25
申请号：US09385567
申请日：1999-08-30
申请人： Dinesh Tyagi , Donna A. DiPrima
发明人： Dinesh Tyagi , Donna A. DiPrima
IPC分类号： C08K300
CPC分类号： C08J3/14
摘要： Polymeric powders of small particle size and size distribution and of irregular morphology are prepared by a limited coalescence procedure wherein a polymer in an organic solvent is dispersed by high shear agitation in an aqueous phase containing colloidal stabilizer particles having opposite electrostatic charges. The organic solvent is evaporated and the polymer particles are recovered from the aqueous medium. The particles are of irregular shape and narrow particle size distribution and have superior electrostatic transfer properties when used as electrostatographic dry toners.
摘要翻译： 通过有限的聚结程序制备小粒度和粒度分布和不规则形态的聚合物粉末，其中通过高剪切搅拌将有机溶剂中的聚合物分散在含有具有相反静电荷的胶体稳定剂颗粒的水相中。 将有机溶剂蒸发并从水性介质中回收聚合物颗粒。 颗粒具有不规则形状和窄的粒度分布，并且当用作静电干燥调色剂时具有优异的静电转印性能。
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2.发明授权
公开(公告)号：US5283149A
公开(公告)日：1994-02-01
申请号：US890053
申请日：1992-05-28
CPC分类号： G03G9/0812 , G03G9/0804 , G03G9/08782 , G03G9/09
摘要： A method is described for the preparation of electrostatographic toner particles which involves the surface treatment of a pigment by depositing thereon a coating of a low melting point wax. The method involves preparing a mixture of a wax solution and a pigment dispersion which is heated to a temperature sufficient to assure dissolution of wax and permitting the mixture to cool slowly to room temperature at which point a coating of wax is deposited upon the surface of the pigment. The wax coated pigment particles are then used as a component of the organic phase in a limited coalescence process.
摘要翻译： 描述了一种用于制备色谱调色剂颗粒的方法，其涉及通过在其上沉积低熔点蜡的涂层来表面处理颜料。 该方法包括制备蜡溶液和颜料分散体的混合物，其加热至足以确保蜡溶解的温度，并允许混合物缓慢冷却至室温，此时将蜡涂层沉积在 颜料。 然后在有限的聚结过程中将蜡涂覆的颜料颗粒用作有机相的组分。
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3.发明授权Toner composition with elastomeric thermoplastic polymer and process of preparing 失效具有弹性体热塑性聚合物的调色剂组合物及其制备方法
公开(公告)号：US5298356A
公开(公告)日：1994-03-29
申请号：US975745
申请日：1992-11-13
申请人： Dinesh Tyagi , Donna A. DiPrima
发明人： Dinesh Tyagi , Donna A. DiPrima
CPC分类号： G03G9/0825 , G03G9/0804 , G03G9/0812 , G03G9/08737
摘要： A method is described for the preparation of electrostatographic toner particles which involves the surface treatment of a pigment by depositing thereon a coating of an elastomeric thermoplastic polymer. The method involves preparing a polymer solution by dissolving an elastomeric thermoplastic polymer selected from the group consisting of linear styrene-isoprene-styrene triblock copolymers, linear styrene-ethylene-butylene-styrene triblock copolymers, linear styrene-isoprene diblock copolymers and linear styrene-ethylene-propylene diblock copolymers in a first solvent capable of dissolving the polymer at ambient temperature; forming a pigment dispersion by mixing at ambient temperature a pigment, a first polymer material and a second solvent in which the elastomeric thermoplastic polymer is insoluble at ambient temperature; admixing the polymer solution with the pigment dispersion so resulting in the elastomeric thermoplastic polymer precipitating out upon the surface of the pigment; mixing the elastomeric thermoplastic polymer coated pigment dispersion thus formed with a solvent in which the elastomeric thermoplastic polymer is insoluble at ambient temperature and, optionally, a second polymer material and, optionally, a charge-control agent to form an organic phase; dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and, optionally, a promoter; homogenizing the resultant mixture, and evaporating the solvent and washing and drying the resultant product.
摘要翻译： 描述了一种用于制备静电色调调色剂颗粒的方法，其涉及通过在其上沉积弹性体热塑性聚合物的涂层来表面处理颜料。 该方法包括通过溶解选自线性苯乙烯 - 异戊二烯 - 苯乙烯三嵌段共聚物，线性苯乙烯 - 乙烯 - 丁烯 - 苯乙烯三嵌段共聚物，线性苯乙烯 - 异戊二烯二嵌段共聚物和线性苯乙烯 - 乙烯的弹性体热塑性聚合物来制备聚合物溶液 丙烯二嵌段共聚物在能够在环境温度下溶解聚合物的第一溶剂中; 通过在环境温度下混合颜料，第一聚合物材料和第二溶剂来形成颜料分散体，其中弹性体热塑性聚合物在环境温度下不溶; 将聚合物溶液与颜料分散体混合，从而导致弹性体热塑性聚合物沉淀在颜料的表面上; 将由此形成的弹性体热塑性聚合物涂覆的颜料分散体与其中弹性体热塑性聚合物在环境温度下不溶的溶剂和任选的第二聚合物材料和任选的电荷控制剂混合以形成有机相; 将有机相分散在包含颗粒稳定剂和任选的助催化剂的水相中; 均化所得混合物，并蒸发溶剂并洗涤和干燥所得产物。
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4.发明授权Toner composition with semi-crystalline polyester wax and method of preparation 失效具有半结晶聚酯蜡的调色剂组合物及其制备方法
公开(公告)号：US5298355A
公开(公告)日：1994-03-29
申请号：US975741
申请日：1992-11-13
CPC分类号： C09B67/0013 , G03G9/0804 , G03G9/0812 , G03G9/08755 , G03G9/09
摘要： A method is described for the preparation of electrostatographic toner particles which involves the surface treatment of a pigment by depositing thereon a coating of a low melting point hydrophobic semi-crystalline polyester wax. The method involves preparing a wax solution by dissolving at ambient temperature a low melting point hydrophobic semi-crystalline polyester wax in a first solvent capable of dissolving the wax at ambient temperature; forming a pigment dispersion by mixing at ambient temperature a pigment, a first polymer material and a second solvent in which the hydrophobic wax is insoluble at ambient temperature; admixing the wax solution with the pigment dispersion so resulting in precipitation of the wax upon the surface of the pigment; mixing the wax coated pigment dispersion thus formed with a solvent in which the hydrophobic wax is insoluble at ambient temperature and, optionally, a second polymer material and, optionally, a charge-control agent to form an organic phase; dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and, optionally, a promoter; homogenizing the resultant mixture, and evaporating the solvent and washing and drying the resultant product.
摘要翻译： 描述了一种用于制备色谱调色剂颗粒的方法，其涉及通过在其上沉积低熔点疏水半结晶聚酯蜡的涂层来对颜料进行表面处理。 该方法包括通过在环境温度下将低熔点疏水半结晶聚酯蜡溶解在能够在室温下溶解蜡的第一溶剂中来制备蜡溶液; 通过在环境温度下混合颜料，第一聚合物材料和其中疏水蜡在环境温度下不溶的第二溶剂形成颜料分散体; 将蜡溶液与颜料分散体混合，使蜡沉淀在颜料的表面上; 将由此形成的蜡涂覆的颜料分散体与疏水蜡在环境温度下不溶的溶剂和任选的第二聚合物材料和任选的电荷控制剂混合以形成有机相; 将有机相分散在包含颗粒稳定剂和任选的助催化剂的水相中; 均化所得混合物，并蒸发溶剂并洗涤和干燥所得产物。
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公开(公告)号：US5283150A
公开(公告)日：1994-02-01
申请号：US890057
申请日：1992-05-28
申请人： Dinesh Tyagi , Donna A. DiPrima
发明人： Dinesh Tyagi , Donna A. DiPrima
CPC分类号： G03G9/09 , G03G9/0802 , G03G9/08782
摘要： A method is described for the preparation of electrostatographic toner particles which involves the surface treatment of pigments using a low melting point highly reactive wax. The method involves preparing a melt dispersion comprising a pigment, a polymeric binder and a low melting point wax at elevated temperatures, the wax melting and coating the surface of the pigment. The melt dispersion is then used as a component of the organic phase in a limited coalescence process.
摘要翻译： 描述了一种制备用于使用低熔点高反应性蜡对颜料进行表面处理的静电色调剂颗粒的方法。 该方法包括在升高的温度下制备包含颜料，聚合物粘合剂和低熔点蜡的熔体分散体，蜡熔化并涂覆颜料的表面。 然后在有限的聚结过程中将熔融分散体用作有机相的组分。
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公开(公告)号：US5133992A
公开(公告)日：1992-07-28
申请号：US520329
申请日：1990-05-07
申请人： Mridula Nair , Zona R. Pierce , Donna A. DiPrima
发明人： Mridula Nair , Zona R. Pierce , Donna A. DiPrima
CPC分类号： G03G9/08795 , G03G9/0825 , Y10S516/06 , Y10S525/902 , Y10S526/909 , Y10S526/91 , Y10S526/911 , Y10T428/2998
摘要： A method of preparing polymer particles having narrow size distribution in a suspension process employing a solid colloidal stabilizing agent. The solid colloidal stabilizer is a copolymer of about 25 to about 80% by weight, based on total monomer weight, of an addition polymerizable nonionic oleophilic monomer, about 5 to about 45%, by weight, of an addition polymerizable nonionic hydrophilic monomer, about 1 to about 50% of an addition polymerizable ionic monomer, and 0 to about 20 percent, by weight, of a crosslinking monomer having at least two addition polymerizable groups. Also disclosed are polymeric particles comprising a core polymer covered by a layer of the smaller copolymer stabilizer particles and electrostatographic toners comprising such polymeric particles.
摘要翻译： 在使用固体胶态稳定剂的悬浮方法中制备具有窄尺寸分布的聚合物颗粒的方法。 固体胶体稳定剂是基于总单体重量计约25至约80重量％的可加成聚合非离子亲油单体的共聚物，约5至约45重量％的可加成聚合的非离子亲水单体，约 1至约50％的可加聚离子单体和0至约20重量％的具有至少两个可加成聚合基团的交联单体。 还公开了包含由较小的共聚物稳定剂颗粒层覆盖的芯聚合物和包含这种聚合物颗粒的静电色调剂的聚合物颗粒。
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公开(公告)号：US4965131A
公开(公告)日：1990-10-23
申请号：US170519
申请日：1988-03-21
申请人： Mridula Nair , Zona R. Pierce , Donna A. DiPrima
发明人： Mridula Nair , Zona R. Pierce , Donna A. DiPrima
CPC分类号： G03G9/0825 , G03G9/08795 , Y10T428/2991
摘要： A method of preparing polymer particles having narrow size distribution in a suspension process employing a solid colloidal stabilizing agent. The solid colloidal stabilizer is a copolymer of about 25 to about 80% by weight, based on total monomer weight, of an additional polymerizable nonionic oleophilic monomer, about 5 to about 45%, by weight, of an addition polymerizable nonionic hydrophilic monomer, about 1 to about 50% of an addition polymerizable ionic monomer, and 0 to about 20 percent, by weight, of a crosslinking monomer having at least two addition polymerizable groups. Also disclosed are polymeric particles comprising a core polymer covered by a layer of the smaller copolymer stabilizer particles and electrostatographic toners comprising such polymeric particles.
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