The present invention relates to biodegradable copolyesters with molecular weight Mn from 10 000 to 100 000 measured by GPC, obtainable via reaction of i) from 51 to 84% by weight, based on the copolyester, of a branched polyester middle block produced from aliphatic or aliphatic and aromatic dicarboxylic acids and from aliphatic dihydroxy compounds with molecular weight Mn from 5000 to 25 000 measured by .sup.1H NMR with from 15.9 to 48.9% by weight, based on the copolyester, of a lactide in the presence of a catalyst, and then the resultant polyester triblock with molecular weight Mn measured by .sup.1H NMR from 5800 to 49 500 with ii) from 0.1 to 3% by weight, based on the copolyester, of a diisocyanate.

The present invention further relates to a process for the production of, and to the use of, the abovementioned biodegradable copolyesters.

An oxygen absorbent composition which comprises a polyester oligomer containing a constitutional unit derived from a tetralin ring-containing carboxylic acid and a diol, wherein the polyester oligomer has a number average molecular weight of 500 to 10000, and a transition metal catalyst comprising at least one transition metal selected from the group consisting of manganese, iron, cobalt, nickel and copper.

An oxygen absorbent composition which comprises a polyester oligomer containing a constitutional unit derived from a tetralin ring-containing carboxylic acid and a diol, wherein the polyester oligomer has a number average molecular weight of 500 to 10000, and a transition metal catalyst comprising at least one transition metal selected from the group consisting of manganese, iron, cobalt, nickel and copper.

The present invention relates to a process for preparing polyester polyols and also to the polyester polyols obtainable by the process.

A preform is disclosed for producing a plastic container. The production of the preform as well as a plastic container that is produced from the preform and its production are also disclosed.

A method is disclosed for producing thin-walled small plastic parts having an average wall thickness of less than about 1.5 mm, wherein the small plastic parts are produced in a plastic injection-molding method from polyethylene furanoate (PEF) having a viscosity of, for example, 0.3 dl/g to 0.7 dl/g, for example, preferably less than e.g., 0.6 dl/g, measured according to a measurement method as per ASTM D4603, which polyethylene furanoate has an exemplary water content of less than 100 ppm in the plastic injection process.

A method is disclosed for producing thin-walled small plastic parts having an average wall thickness of less than about 1.5 mm, wherein the small plastic parts are produced in a plastic injection-molding method from polyethylene furanoate (PEF) having a viscosity of, for example, 0.3 dl/g to 0.7 dl/g, for example, preferably less than e.g., 0.6 dl/g, measured according to a measurement method as per ASTM D4603, which polyethylene furanoate has an exemplary water content of less than 100 ppm in the plastic injection process.

Disclosed is a molded article, and more particularly a molded article for a vehicle interior material including a thermoplastic resin composition having reduced birefringence while maintaining the superior transmittance and impact strength of existing polycarbonate resin by including a first resin including a polycarbonate resin and a second resin having a difference in refractive index of 0.05 or less from the first resin and a transmittance of 90% or more.

The present invention relates to a process for preparing a polyester carbonate on the basis of diacids and at least one 1,4:3,6-dianhydrohexitol and at least one additional cycloaliphatic dihydroxy compound, to a polyester carbonate and to a molding compound and a molding body containing the polyester carbonate. The polyester carbonates according to the invention are characterized by a high proportion of bio-based structural motifs and good mechanical properties and molecular weights.

The present invention relates to a multilayer container preform and a multilayer container, said preform or container comprising a base, a body and a neck finish, said base and body comprising an outer layer defining an exterior surface, an inner layer defining an interior surface and interior space, and an intermediate layer disposed between the outer layer and the inner layer, said outer layer and said inner layer comprising a primary material selected from the group consisting of a 2,5-furandicarboxylate polyester or co-polyester or a blend thereof, and said intermediate layer comprising a secondary material different from the primary material, but compatible with the primary material. The invention relates to methods of producing such a multilayer container preform and multilayer container