Patent ID: 11859046
Assignee: ROQUETTE FRERES
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The process for producing the polyester according to claim 1, further comprising increasing molar mass of the polyester by post-polymerization with a polymer of lower reduced viscosity in solution comprising the 1,4:3,6-dianhydrohexitol units (A), the alicyclic diol units (B) other than the 1,4:3,6-dianhydrohexitol units (A) and the terephthalic acid units (C),
wherein the units (A), (B) and (C) do not contain any aliphatic non-cyclic diol units or comprise a molar amount of aliphatic non-cyclic diol units, relative to all of the monomer units of the polymer, of less than 5%.