US 7,320,853 B2
Liquid toners comprising amphipathic copolymeric binder that have been prepared, dried and redispersed in the same carrier liquid
Hsin Hsin Chou, Woodbury, Minn. (US); Manuel Lozada, New Brighton, Minn. (US); Brian Teschendorf, Vadnais Heights, Minn. (US); and A. Kristine Fordahl, St. Paul, Minn. (US)
Assigned to Samsung Electronics Company, Suwon (Korea, Republic of)
Filed on Oct. 31, 2004, as Appl. No. 10/978,636.
Prior Publication US 2006/0093950 A1, May 04, 2006
Int. Cl. G03G 5/00 (2006.01)
U.S. Cl. 430—137.22  [430/114] 19 Claims
 
1. A method of preparing a liquid electrographic toner composition comprising
a) preparing a polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions in a reaction solvent, wherein the reaction solvent comprises less than about 10% aromatic components by weight and has a Kauri-Butanol number less than about 30 mL;
b) formulating toner particles comprising the polymeric binder of step a) in the reaction solvent and a visual enhancement additive;
c) drying a plurality of toner particles as formulated in step b) to provide a dry toner particle composition; and
d) redispersing the dry toner particle composition of step c) in a carrier liquid having substantially the same chemical constitution as the reaction solvent to form a redispersed liquid electrographic toner composition.