Polymer shells similar to those described in U.S. Pat. No. 6,822,782 can be formed on pigment particles by (a) physi-sorping a reagent comprising polymerizable groups on to the pigment particles by treating the particle with a reagent having a polymerizable or polymerization-initiating group, such that the reagent will not desorb from the particle surface when the particle is placed in a hydrocarbon medium; or (b) treating pigment particles bearing nucleophilic groups with a reagent having a polymerizable or polymerization-initiating group, and an electrophilic group, thus attaching the polymerizable or polymerization-initiating groups to the particle surface. The zeta potential of the pigment particles can be varied by a process similar to (b) but using a reagent which does not have a polymerizable or polymerization-initiating group.
与美国专利 No.No.6,822,782 号专利中所述的聚合物壳,可通过以下方法在
颜料颗粒上形成:(a) 用具有可聚合基团或聚合引发基团的试剂处理
颜料颗粒,使试剂在颗粒置于烃类介质中时不会从颗粒表面解吸,从而在
颜料颗粒上物理吸附含有可聚合基团的试剂;或 (b) 用具有可聚合基团或聚合引发基团以及亲电基团的试剂处理带有亲核基团的
颜料颗粒,从而将可聚合基团或聚合引发基团附着在颗粒表面。
颜料颗粒的 zeta 电位可通过与(b)类似的过程来改变,但要使用不具有可聚合基团或聚合引发基团的试剂。