TONER CONTAINING RESIN PREPARED BY A COMBINATION OF EMULSIONFOLLOWED BY SUSPENSION POLYMERIZATION

摘要

A method for preparing thermoplastic toner resins is disclosed and the toner resins produced by said method. More particularly, an emulsion polymerized resin, constituting a high molecular weight component, is used a s a seed for subsequent suspension polymerization of a lower molecular weight component. The emulsion micelles are swelled with monomers and subsequent suspension polymerization produces particles where the high and low molecular weight components are interpenetrated to form a resin with a bimodal distribution of molecular weight. A toner composition is made using the resin as the main component. The resin particle has a first resin portio n having a particle size in the range of about 50 to about 200 nm. and a numbe r average molecular weight in the range of about 10 4 to about 10 7, and a second resin portion formed around the first resin portion with a number average molecular weight lower than that of said first resin portion, the resin havi ng a polydispersity in the range of 5 to 50.