INSITU CARBOXYLIC ACID POLYMER EMULSIONS FOR EMULSION/AGGREGATION TONERS
Original Publication Date: 1997-Aug-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed are method for preparing toners by emulsiodaggregation techniques which permit control of the surface chemistry and properties of the resulting latex particles. In one approach, by controlling the feed rates of various monomers into the emulsion polymerization reactor, the proportion of acrylic acid at the particle surface can be increased. In another approach, polyacrylic acid, which act as a stabilizer, is preformed in the reactor prior to the addition of other monomers. Both approaches are useful in controlling the surface and physical properties of the resulting toner particles. An additional advantage of the methods is the ability to reduce the need for extensive washing of the resulting particles to remove unwanted surfactant.