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US 2014/0350211 A1Published application
Process for producing polyesters
AssigneeEvonik Industries AG
InventorsAndre Hennig, Thomas Schmied, Juergen Luh, Thorsten Brand, Guenter Schmitt, Michael Korell
Life of this patent
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Abstract
The present invention relates to a process for producing high-molecular-weight copolyesters with use of a kneader.
Claims16
A process for producing a polyester, the process comprising
- reacting a di- and/or polycarboxylic acid (DPA) with a mono- or polyhydric alcohol (MPOH), or ring-opening a lactone, thereby producing an ester, and,
- conducting a polycondensation reaction on said ester in a kneader to produce a polyester.
Dependencies are inferred from the claim text.