Abstract: A polyester comprises ethylene 2,5 furandicarboxylate units and diethylene glycol units, the polyester having a melting temperature Tf of greater than or equal to 225° C., an intrinsic viscosity of greater than or equal to 0.65 dL/g, and in which the amount of diethylene glycol unit, denoted DEG, is less than 4 mol % and the quantity of ester functions in chain end situations is less than 100 meq/kg. A process for producing the polyester is disclosed.

Abstract: The invention relates to a process for producing aromatic polyimides, comprising the following steps: (a) preparation of one or more solid salt(s) by reacting one or more aromatic tetracarboxylic acid(s) and one or more diamine(s) according to a mole ratio ranging from 0.95 to 1.05; (b) drying of the solid salt(s), (c) addition, to the dry salt resulting from step (b), of one or more compound(s) (C) comprising one or more group(s) chosen from a carboxylic acid group, an anhydride group, an ester group and an acyl chloride group; (d) solid-state polymerization of said solid salt(s) in the presence of the compound(s) (C).

Abstract: The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising: •a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol; •a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts; •a step of polymerizing said monomers to form the polyester; •a step of recovering a polyester composition comprising the polyester and the catalytic system.

Abstract: The invention relates to a process for producing aromatic polyimides, comprising the following steps: (a) preparation of one or more solid salt(s) by reacting one or more aromatic tetracarboxylic acid(s) and one or more diamine(s) according to a mole ratio ranging from 0.95 to 1.05; (b) drying of the solid salt(s), (c) addition, to the dry salt resulting from step (b), of one or more compound(s) (C) comprising one or more group(s) chosen from a carboxylic acid group, an anhydride group, an ester group and an acyl chloride group; (d) solid-state polymerization of said solid salt(s) in the presence of the compound(s) (C).

Abstract: The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising:·a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol;·a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts;·a step of polymerising said monomers to form the polyester;·a step of recovering a polyester composition comprising the polyester and the catalytic system.

Abstract: The present invention relates to PBS- and silica-based composites, said composites having a high swelling ability. It also relates to a method of preparing said composites, a method of swelling said composites and films obtained by swelling said composites.

Abstract: The present invention relates to copolymers, in particular poly(butylenesuccinate-co-furanoate) (PBSF) copolymers, which have advantageous mechanical properties, and also to polymeric compositions comprising them. It also relates to a process for preparing these polymers.

Abstract: The present invention relates to copolymers, in particular poly(butylenesuccinate-co-furanoate) (PBSF) copolymers, which have advantageous mechanical properties, and also to polymeric compositions comprising them. It also relates to a process for preparing these polymers.

Abstract: The present invention relates to PBS- and silica-based composites, said composites having a high swelling ability. It also relates to a method of preparing said composites, a method of swelling said composites and films obtained by swelling said composites.

Abstract: The present invention relates to a thermoplastic composition, said composition comprising at least one non-PVC thermoplastic matrix and at least one copolymer chosen from the group consisting of acrylic-based copolymer having an average molecular weight Mw below 400.000 g/mol and acrylic-styrene-based copolymer. The present invention also relates to a process for manufacturing an article from such a thermoplastic composition and to an article obtained from such a thermoplastic composition.