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US 7,071,291 B2Granted
Isolation, formulation and shaping of macrocyclic oligoesters
AssigneeCyclics Corporation
InventorsTimothy A. Thompson, Peter D. Phelps, Steven J. Winckler
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Abstract
Processes for isolating, formulating, and shaping macrocyclic oligesters were developed which allow efficient production of macrocyclic oligoesters substantially free from solvent, which may include additives, fillers, and catalysts.
Claims30
A process for isolating a macrocyclic oligoester, the process comprising the steps of:
- (a) providing a solution comprising a macrocyclic oligoester and a solvent, the macrocyclic oligoester comprising a structural repeat unit of formula (I):
- wherein R is an alkylene, a cycloalkylene, or a mono- or polyoxyalkylene group and A is a divalent aromatic or alicyclic group;
- (b) removing the solvent from the solution at an elevated temperature, at a reduced pressure, or both;
- and
- (c) collecting the macrocyclic oligoester substantially free from the solvent.
2 more elements
Dependencies are inferred from the claim text.