Patent ID: 7635745
Filing Date: 2009-12-22
Classification: C08J,Y02W,Y10T

Abstract:
1. A process for recovering a water-dispersible sulfopolyester comprising the steps of: (a) providing an aqueous dispersion comprising said water-dispersible sulfopolyester, wherein said water-dispersible sulfopolyester comprises: (b) removing water from said aqueous dispersion thereby forming a sulfopolyester concentrate having a sulfopolyester concentration at least twice that of said aqueous dispersion, wherein said aqueous dispersion comprises less than about 10 weight % of said water-dispersible sulfopolyester, wherein said sulfopolyester concentrate has a sulfopolyester concentration of greater than about 20 weight percent; and (c) recovering at least a portion of said sulfopolyester from said sulfopolyester concentrate to produce a recovered sulfopolyester. wherein said recovered sulfopolyester exhibits an average molecular weight of at least about 50% of the molecular weight of said sulfopolyester present in said aqueous dispersion.