Patent ID: 7317065
Filing Date: 2008-01-08
Classification: C08G,C12P,Y10T

Abstract:
1. A highly functional hyperbranched polyester obtained by a process which comprises reacting a reaction solution comprising solvent and (a) one or more dicarboxylic acids or one or more derivatives thereof with one or more at least trifunctional alcohols, (b) one or more tricarboxylic acids or higher polycarboxylic acids or one or more derivatives thereof with one or more diols, (c) one or more tricarboxylic acids or higher polycarboxylic acids or one or more derivatives thereof with one or more at least trifunctional alcohols, (d) one or more di- or polyhydroxycarboxylic acids, (e) one or more hydroxydi- or hydroxypolycarboxylic acids, or (f) a mixture of at least two of (a), (b), (c), (d) and (e), in the presence of an enzyme at a temperature above 60° C. and a pressure above 500 mbar.