Patent · US Active

Process to prepare a cyclic oligomer and a cyclic oligomer obtainable thereby and a process to polymerize it

US11149111B2 · kind B2 · utility

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1References

20Claims

0Family size

Assignee

Sulzer Management AG · CH

Inventors

Liborio Ivano Costa · Winterthur, CH
Peter Joachim Fleckenstein · Ludwigshafen am Rhein, DE
Jan-Georg Rosenboom · Zürich, CH
Giuseppe Storti · Lodi, IT
Massimo Morbidelli · Zürich, CH

Key dates

Filing date	Mar 23, 2018
Grant date	Oct 19, 2021
Priority date	—
Expiry date	Jun 30, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process to prepare a (iv) cyclic polyester oligomer composition includes a cyclic polyester oligomer having furanic units and two to five repeat units. The process includes (a) reacting a monomer composition including: (i) a bifunctional furan-derivative and (ii) a diol in an linear oligomerization step to produce a (iii) linear oligomer composition including a linear oligomer species, (b) reacting the (iii) linear oligomer composition in a distillation-assisted cyclization (DA-C) step to form a (iv) cyclic polyester oligomer composition and a (v) diol byproduct. The (v) diol byproduct is removed by evaporation in the distillation-assisted cyclization (DA-C) step.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.