A process for preparing a recycle content polyester and a recycle content polyester composition comprising at least one polyester having at least one residue in the polyester derived from a recycle propylene composition are provided.

Provided is a method for producing an aliphatic-aromatic polyester, such as PBST, by an esterification and/or transesterification reaction and a polycondensation reaction, the method being capable of reducing the insufficiency in the degree of crystallization in the related art and capable of producing an aliphatic-aromatic polyester having a high degree of crystallinity. A method for producing an aliphatic-aromatic polyester, the method including subjecting an aliphatic diol component, an aliphatic dicarboxylic acid component, and an aromatic dicarboxylic acid component that serve as raw materials to an esterification and/or transesterification reaction and a polycondensation reaction subsequent to the esterification and/or transesterification reaction in a presence of a catalyst, wherein, while the aliphatic-aromatic polyester is produced, a nucleating agent that satisfies a condition represented by Formula (1) below is present in a reaction system. 0° C.<Tm.sup.1−Tm.sup.2≤100° C. . . . (1) Tm.sup.1: a melting point (° C.) of the nucleating agent, Tm.sup.2: a melting point (° C.) of the aliphatic-aromatic polyester

Provided is a method for producing an aliphatic-aromatic polyester, such as PBST, by an esterification and/or transesterification reaction and a polycondensation reaction, the method being capable of reducing the insufficiency in the degree of crystallization in the related art and capable of producing an aliphatic-aromatic polyester having a high degree of crystallinity. A method for producing an aliphatic-aromatic polyester, the method including subjecting an aliphatic diol component, an aliphatic dicarboxylic acid component, and an aromatic dicarboxylic acid component that serve as raw materials to an esterification and/or transesterification reaction and a polycondensation reaction subsequent to the esterification and/or transesterification reaction in a presence of a catalyst, wherein, while the aliphatic-aromatic polyester is produced, a nucleating agent that satisfies a condition represented by Formula (1) below is present in a reaction system. 0° C.<Tm.sup.1−Tm.sup.2≤100° C. . . . (1) Tm.sup.1: a melting point (° C.) of the nucleating agent, Tm.sup.2: a melting point (° C.) of the aliphatic-aromatic polyester

The present invention relates to a polyester container. The polyester container is formed from a polyester resin containing a particular content of diol moieties derived from isosorbide and diethylene glycol, and thus can show high transparency in spite of a great wall thickness thereof.

Embodiments relate to a crosslinked citrate-based elastomer catheter that is biodegradable and kink resistant. Embodiments of the crosslinked citrate-based elastomer material swells when surrounded by fluid (body fluid) so as to anchor the catheter to tissue but not anchor it so much that movement or removal will cause tissue damage. The catheter can be used as a component to a peripheral nerve block device, for example. Embodiments of the catheter can include embedding biodegradable sensors, moieties, shape memory material, etc. to monitor and modulate functions of the catheter and/or peripheral nerve block.

A process for producing a polyester composition from recycled polyesters.

A process for producing a polyester composition from recycled polyesters.

The present invention relates to a process for preparing a polyester carbonate on the basis of cycloaliphatic diacids and at least one 1,4:3,6-dianhydrohexitol and at least one additional aliphatic dihydroxy compound, to the polyester carbonate prepared according to the process and to a molding compound and a molding body containing the polyester carbonate. The process according to the invention is a direct synthesis, in which all structural elements forming the subsequent polyester carbonate are present as monomers already in the first process step. It is characterized in that a specific ratio of 1,4:3,6-dianhydrohexitol and the at least one additional aliphatic dihydroxy compound is advantageous.

A method for forming additive-containing reclaimed polyester can include: providing a feed of recycled polyester; providing a feed of polyester precursors; depolymerizing the recycled polyester to obtain depolymerized polyester monomers; polymerizing the depolymerized polyester monomers with the polyester precursors to form a reclaimed polyester; adding additives to the reclaimed properties to adjust for example, the color and/or viscosity, and providing the additive-containing reclaimed polyester as output.

A method for forming additive-containing reclaimed polyester can include: providing a feed of recycled polyester; providing a feed of polyester precursors; depolymerizing the recycled polyester to obtain depolymerized polyester monomers; polymerizing the depolymerized polyester monomers with the polyester precursors to form a reclaimed polyester; adding additives to the reclaimed properties to adjust for example, the color and/or viscosity, and providing the additive-containing reclaimed polyester as output.