Patent ID: 9376530
Filing Date: 2016-06-28
CPC Classification: C08G

Claim Text:
1. A method for the production of a polyester or copolyester, in which a) at least one aliphatic dicarboxylic acid with 2 to 12 carbon atoms and/or acid anhydrides derived therefrom and at least one aliphatic alcohol with 2 to 12 carbon atoms and at least two hydroxyl functionalities are mixed together to produce a solution, wherein the solution is produced at a temperature of 100° C. to 250° C., b) the solution obtained in step a) is added to an esterification product which comprises at least one diester and/or at least one an oligoester that was obtained from at least one aliphatic dicarboxylic acid with at least one aliphatic alcohol, and made to react there, and c) the reaction product obtained from step b) is polycondensed or copolycondensed at reduced pressure relative to normal conditions.