摘要:
A process to prepare a polyester polymer composition comprising a polyester polymer having furanic units is disclosed. The process comprises the step of reacting a cyclic polyester oligomer in the presence of a catalyst in a ring- opening polymerization step under conditions of a reaction temperature and reaction time sufficient to yield a polyester polymer having furanic units. The invention further relates to a polyester polymer composition obtainable by said process, wherein the polyester polymer composition comprises a polyester polymer having furanic units and a cyclic polyester oligomer comprising either structure Y 1 or Y 2 , preferably in a concentration of less than 5 wt %, more preferably less than 1, more preferably less than 0.5in the composition. The present invention further relates also to the use of said polyester polymer composition in extrusion, injection molding, or blow molding.
摘要:
A process to prepare a cyclic polyester oligomer composition comprising a cyclic polyester oligomer having furanic units is disclosed. The process comprises the step of reacting a monomer component in a ring closing oligomerization step carried out in the presence of a solvent by means of reactive distillation. Linear oligomeric polyester species are separated and removed by one or more sub-steps of adding a zeolite and absorbing impurities onto the zeolite, separating the zeolite having absorbed impurities, cooling the cyclic oligomeric composition and/or adding an anti-solvent in order to precipitate out the cyclic polyester oligomers. The invention further relates to a cyclic polyester oligomer composition obtainable by said process and also to its use in the production of a polyester polymer, particularly by polymerization in the presence of a plasticizer, as well as the polyester polymer obtained thereby.
摘要:
A process to prepare a cyclic polyester oligonner composition comprising a cyclic polyester oligomer having furanic units is disclosed. The process comprises the step of reacting a monomer component in the presence of an optional catalyst and/or optional organic base in a ring closing oligomerization step under conditions of a reaction temperature and reaction time sufficient to yield a cyclic polyester oligomer having furanic units. The invention further relates to a cyclic polyester oligomer composition obtainable by said process, wherein the cyclic polyester oligomer composition comprises a cyclic polyester oligomer of structure Y1 or Y2 having furanic units, wherein the composition contains less than 5 %, preferably 3, most preferably 1 weight % of linear oligomeric polyester species in the composition. The present invention further relates also to the use of said cyclic polyester oligomer composition in the production of a polyester polymer.