Sulzer Chemtech Ag

David Pfister

Massimo Morbidelli

Liborio Ivano Costa

Philip Nising

Giuseppe Storti

Francesca Tancini

A process to prepare a polyester polymer composition comprising a polyester polymer having furanic units is disclosed. The process comprises a step of ring-opening polymerization of a cyclic polyester oligomer, which comprises residue of furandicarboxylic acid and a diol, in the presence of a catalyst in order to yield a polyester polymer having furanic units. The polyester polymer composition obtainable by the process, wherein the polyester polymer composition comprises a polyester polymer having furanic units and a cyclic polyester oligomer in a concentration of less than 5 wt % of the composition. The use of the polyester polymer composition in extrusion, injection molding, or blow molding are also disclosed.

Process to prepare a polyester polymer composition comprising a polyester polymer having furanic units and a polyester polymer composition obtainable thereby and the use thereof

A process to prepare a cyclic polyester oligomer composition having a cyclic polyester oligomer having furanic units, includes the step of reacting a monomer component, for example, 2,5-furan dicarboxylic acid and, for example, ethylene glycol, in a ring closing oligomerization at a reaction temperature and reaction time, for example, at 100&#xb0; C. to 350&#xb0; C. for 30 to 600 minutes to obtain a cyclic polyester oligomer having furanic units. The process yields a cyclic polyester oligomer composition which can be used in further ring-opening polymerization reactions to produce a polyester polymer. The cyclic polyester oligomer composition has a cyclic polyester oligomer having furanic units and less than 5% linear oligomeric polyester species in the composition.

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Zurich, Switzerland

David Pfister