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US 6,740,728 B2Granted
Methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s and uses of the materials obtained therefrom
AssigneePraxair Technology, Inc.
InventorsYong Ding, Benjamin Bikson
Life of this patent
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Abstract
The present invention relates to methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s. The materials obtained by the methods of present invention are useful as fluid separation membranes and as high performance materials.
Claims19
A polymer containing a main-chain ester linkage which is formed by the solution polycondensation reaction between an acetyl chloride and a phenol in presence of a catalyst.
A poly(ester imide) comprised of chemically combined aromatic units of the following general formula:
- where —Ar1— is a divalent aromatic organic radical having the following structure
- or a mixture thereof, and —Ar2— is independently a divalent aromatic radical having the following structure:
- or a mixture thereof;
- Where Ar3 is independently
- or a mixture thereof.;
- —Ar4— is
- or a mixture thereof.
4 more elements
Dependencies are inferred from the claim text.