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US 10,883,198 B2Granted
Bio-derived polyurethane fiber
AssigneeThe LYCRA Company LLC
InventorsRobert O. Waldbauer, Jr., Norman J. D'Allura
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Abstract
Included are elastomeric fibers and method for preparing such fibers, which include a bio-derived butanediol. The bio-derived butanediol is used to prepare a polymeric glycol composition, which is contacted with a diisocyanate and spun to provide an elastomeric fiber.
Claims10
A method for preparing an elastomeric fiber comprising:
- (a) providing a polymeric glycol composition;
- (b) contacting said polymeric glycol composition with at least one diisocyanate;
- (c) dissolving a capped glycol in a solvent to provide a capped glycol solution;
- (d) contacting the capped glycol solution with a chain extender composition;
- and
- (e) spinning the solution to form the elastomeric fiber;
- wherein said polymeric glycol composition includes at least one polymeric glycol which is synthesized from succinate or α-ketoglutarate using a bio-derived 1,4-butanediol obtained from a recombinant host or enzymes of the recombinant host comprising 2-oxoglutarate decarboxylase or a succinyl-CoA-synthetase which is converted to tetrahydrofuran prior to polymerization to form the polymeric glycol composition, and wherein yarn formed from said elastomeric fiber has a tenacity at break of at least 0.6 cN/dtex, a break elongation of at least 400% and an unload modulus at 300% elongation of at least 27 mg/dtex.
4 more elements
Dependencies are inferred from the claim text.