Patent ID: 6596453
Filing Date: 2003-07-22
Classification: C08F,G03G

Abstract:
A process for producing a polymerized toner, comprising the step of polymerizing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant in an aqueous medium, wherein an aqueous dispersion containing formed polymer particles is subjected to stripping under reduced pressure in an evaporator after polymerization, and at this time the aqueous dispersion within the evaporator is continuously taken out of the evaporator and heated in an external heat exchanger, and the heated aqueous dispersion is returned to a liquid phase within the evaporator and subjected to stripping under reduced pressure within the evaporator while circulating the aqueous dispersion, thereby distilling off volatile organic compounds, and wherein polymer particles containing a residual polymerizable monomer in a proportion of at most 100 ppm are recovered from the dispersion remaining in the evaporator.