Abstract: A method for manufacturing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit, including a step of introducing, into a reactor, monomers comprising at least one monomer (A) which is a diacid or a diester and at least one monomer (B) which 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 tin, or a catalyst comprising the elements germanium and tin or a mixture of said catalysts, a step of polymerizing the monomers to form the polyester, a step of recovering a polyester composition comprising the polyester and the catalytic system. The invention also relates to a polyester composition containing a catalytic system and the use of same to reduce the colouring of the polyester.

Abstract: The invention is directed to a polyester comprising 5-furandicarboxylic acid moieties (A); ethylene glycol moieties (B); 1,4:3,6-dianhydrohexitol moieties (C); alicyclic diol moieties other than the 1,4:3,6-dianhydrohexitol moieties (D); wherein the molar ratio (B)/[(B)+(C)+(D)] is greater than 0.2. The invention aloes relates to a process of preparing the polyester and to its use.

Abstract: A polyester including at least one furandicarboxylate unit, at least one saturated, linear or branched, diol unit including from 2 to 10 carbon atoms, and at least one bicyclic diol unit, the said bicyclic diol being chosen from: isosorbide, isoidide, isomannide, 2,3:4,5-di-O-methylene-galactitol, and 2,4:3,5-di-O-methylene-D-mannitol. The glass transition temperature of the polyester is greater than or equal to 90° C. Processes for preparing this polyester are also described.

Abstract: A thermoplastic polyester including: at least one 1,4:3,6-dianhydrohexitol unit (A); at least one cyclic diol unit (B) other than cyclohexanedimethanol units and 1,4:3,6-dianhydrohexitol units (A); and at least one aromatic carboxylic diacid unit (C), the polyester being free from ethylene glycol units. It also relates to the production method and use of same.

Abstract: A thermoplastic polyester having: at least one 1,4:3,6-dianhydrohexitol unit; at least one alicyclic diol unit other than 1,4:3,6-dianhydrohexitol units; at least one carboxylic diacid unit selected from among furan-2,5-dicarboxylic acid, 2,6-naphthalic acid and isophthalic acid units, said polyester including at least 10% 1,4:3,6-dianhydrohexitol units and being free from ethylene glycol and terephthalic acid units. The invention also relates to the production method and use of same.

Abstract: A thermoplastic polyester includes: at least one tetrahydrofuran-dimethanol diol motif (A); and at least one aromatic acid motif (B) selected from terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalene dicarboxylic acid and 1,4-naphthalene dicarboxylic acid, the glass transition temperature thereof being higher than, or equal to, 50° C. A method for producing polyester including the motifs (A) and (B) is also described.

Abstract: A thermoplastic polyester includes: at least one tetrahydrofuran-dimethanol diol motif (A); at least one furandicarboxylic acid motif (B); and at least one aliphatic diol motif (C). A method for producing polyester including the motifs (A), (B) et (C) is also described.

Abstract: A polyester including at least one furandicarboxylate unit, at least one saturated, linear or branched, diol unit including from 2 to 10 carbon atoms, and at least one bicyclic diol unit, the said bicyclic diol being chosen from: isosorbide, isoidide, isomannide, 2,3:4,5-di-O-methylene-galactitol, and 2,4:3,5-di-O-methylene-D-mannitol. The glass transition temperature of the polyester is greater than or equal to 90° C. Processes for preparing this polyester are also described.