Process of producing polyester latex with buffer

摘要

Methods herein include mixing at least one polyester resin with at least one solvent to form a resin mixture, adding water to cause phase inversion and form a polyester latex, adding at least one buffering agent to the phase inverted mixture to stabilize the phase inverted mixture, and subsequent to the buffering agent addition, substantially removing the at least one solvent from the phase inverted mixture.

主权项

1. A process of producing a polyester latex comprising:
mixing at least one crystalline polyester resin with at least one solvent having an ionic surfactant to form a mixture; adding a neutralizing agent to the mixture to provide a neutralized mixture, such that the ionic surfactant and the crystalline polyester resin of the mixture are neutralized; phase inverting the neutralized mixture by adding water; buffering the phase inverted mixture by adding at least one weak acid or weak base buffering agent; and subsequent to the buffering agent addition, removing the at least one solvent from the phase inverted mixture until the polyester latex contains less than 600 ppm of the at least one solvent; wherein the latex has a stability of at least 3 months.