公开(公告)号：US06399701B1

公开(公告)日：2002-06-04

申请号：US09570724

申请日：2000-05-15

申请人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

发明人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

IPC分类号： C08L3102

CPC分类号： G03G9/1133 ,  C08F2/22 ,  C08F20/14 ,  G03G9/1131

摘要： Submicron sized particles of poly(methyl methacrylate) are prepared by a surfactant-free semi-continuous emulsion polymerization process that involves (i) preparing an aqueous phase containing a free radical initiator in water by heating and stirring, (ii) preparing a monomer composition containing at least 80% by weight methyl methacrylate and 1 to 10% by weight of a crosslinking agent, (iii) adding the monomer composition to the aqueous phase to initiate emulsion polymerization of the monomer composition, the adding being done at a rate such that from 0.05% to 5% by weight of the total weight of the monomer composition is added per minute, (iv) continuing heating and stirring following completion of the adding of the monomer composition for an amount of time, and (v) drying and recovering the submicron sized particles of poly(methyl methacrylate). The submicron sized particles of poly(methyl methacrylate are used in forming a coating of carrier particles for a two-component developer composition.

摘要翻译： 聚甲基丙烯酸甲酯的亚微米尺寸颗粒是通过无表面活性剂的半连续乳液聚合方法制备的，其包括（i）通过加热和搅拌在水中制备含有自由基引发剂的水相，（ii）制备单体组合物 含有至少80重量％的甲基丙烯酸甲酯和1至10重量％的交联剂，（iii）将单体组合物加入到水相中以引发单体组合物的乳液聚合，加入的速率使得 每分钟加入0.05〜5重量％的单体组合物，（iv）在完成单体组合物加入一段时间后继续加热和搅拌，（v）干燥和回收 聚甲基丙烯酸甲酯的亚微米尺寸颗粒。 聚（甲基丙烯酸甲酯）的亚微米尺寸的颗粒用于形成用于双组分显影剂组合物的载体颗粒的涂层。