"yester may be recovered and reused by processes such as evaporation and/or nanofiltration; final recovery of sulfopolyester may be achieved by further evaporation of water and/or salt precipitationUS763857825 Aug 200829 Dec 2009Xerox CorporationMelt-mixing sulfonated polyester resin with water; heating and agitating the mixture; toner particles, ultra low melt emulsion/aggregation applications, fr" . . . .