Patent ID: 8394568
Filing Date: 2013-03-12
Classification: G03G

Abstract:
1. A process for synthesizing a polyester latex, the process comprising: providing to a reaction vessel a polyester-forming reaction mixture consisting of (1) diacid or diester monomer(s), (2) diol monomer(s), and (3) polycondensation catalyst(s), heating the reaction vessel to a temperature of from 65° C. to 360° C. and then polymerizing the diacid or diester monomer(s) with the diol monomer(s) to form a polyester melt resin comprising at least one polyester, after completion of the polymerizing, cooling the polyester melt resin to 50° C. to 150° C., and at the cooled temperature, providing a neutralizing solution comprising at least one neutralizing agent and at least one surfactant to the polyester melt resin to form an emulsification solution, and from the cooled temperature, maintaining or heating the emulsification solution to a temperature above a glass transition temperature or melting temperature of the at least one polyester, and then emulsifying the at least one polyester in the emulsification solution to synthesize the polyester latex, and wherein the emulsifying is accomplished without use of a solvent.