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US 6,599,625 B2Granted
Polyether ester elastomer comprising polytrimethylene ether ester soft segment and trimethylene ester hard segment
AssigneeE. I. Du Pont de Nemours and Company
InventorsMarc B. Goldfinger, Hari B. Sunkara
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Abstract
A polyether ester elastomer comprising about 90-about 60 weight % polytrimethylene ether ester soft segment and about 10-about 40 weight % trimethylene ester hard segment, and use thereof in fibers and other shaped articles. The fibers have excellent physical properties, including superior strength and stretch recovery.
Claims38
A polyether ester elastomer comprising about 90-about 60 weight % polytrimethylene ether ester soft segment and about 10-about 40 weight % trimethylene ester hard segment.
A polyether ester comprising a soft segment represented by the structure:
- and a hard segment represented by the structure:
- where x is about 17 to about 86 and R and R′, which may be the same or different, are divalent radicals remaining after removal of carboxyl functionalities from dicarboxylic acid equivalent.
Dependencies are inferred from the claim text.