Bio-derived polyurethane fiber

1. 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.

2. The method of claim 1 , wherein said elastomeric fiber is spandex.

3. The method of claim 1 , wherein said polymeric glycol is a copolymer of tetrahydrofuran and at least one member of the group consisting of ethylene oxide, propylene oxide, trimethylene oxide, 3-methyltetrahydrofuran, and combinations thereof.

4. The method of claim 1 , wherein said diisocyanate includes at least one diisocyanate selected from the group consisting of 4,4′-methylene bis(phenyl isocyanate), 2,4′-methylene bis(phenyl isocyanate) 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene, 1-isocyanato-2-[(4-cyanatophenyl)methyl]benzene, bis(4-isocyanatocyclohexyl) methane, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane, 1,3-diisocyanato-4-methyl-benzene, 2,2′-toluenediisocyanate, 2,4′-toluenediisocyanate, and mixtures thereof.

5. The method of claim 1 , wherein said chain extender composition includes at least one diol or diamine chain extender.

6. The method of claim 1 , wherein said chain extender composition includes at least one diamine chain extender selected from the group consisting of hydrazine; 1,2-ethylenediamine; 1,4-butanediamine; 1,2-butanediamine; 1,3-butanediamine; 1,3-diamino-2,2-dimethylbutane; 1,6-hexamethylenediamine; 1,12-dodecanediamine; 1,2-propanediamine; 1,3-propanediamine; 2-methyl-1,5-pentanediamine; 1-amino-3,3,5-trimethyl-5-aminomethylcyclohexane; 2,4-diamino-1-methylcyclohexane; N-methylamino-bis(3-propylamine); 1,2-cyclohexanediamine; 1,4-cyclohexanediamine; 4,4′-methylene-bis(cyclohexylamine); isophorone diamine; 2,2-dimethyl-1,3-propanediamine; meta-tetramethylxylenediamine; 1,3-diamino-4-methylcyclohexane; 1,3-cyclohexane-diamine; 1,1-methylene-bis(4,4′-diaminohexane); 3-aminomethyl-3,5,5-trimethylcyclohexane; 1,3-pentanediamine (1,3-diaminopentane); m-xylylene diamine and combinations thereof.

7. The method of claim 1 , wherein said solution further comprises a blocking agent.

8. The method of claim 1 , wherein said solution further comprises at least one additive selected from the group consisting of anti-oxidants, UV stabilizers, colorants, pigments, cross-linking agents, phase change materials, antimicrobials, minerals, microencapsulated additives, nanoparticles (i.e., silica or carbon), nano-clay, calcium carbonate, talc, flame retardants, antitack additives, chlorine degradation resistant additives, vitamins, medicines, fragrances, electrically conductive additives, dyeability and/or dye-assist agents and combinations thereof.

9. The method of claim 1 , wherein said solution further comprises an additive selected from the group consisting of adhesion promoters, anti-static agents, anti-creep agents, optical brighteners, coalescing agents, electroconductive additives, luminescent additives, lubricants, organic and inorganic fillers, preservatives, texturizing agents, thermochromic additives, insect repellants, and wetting agents, stabilizers (hindered phenols, zinc oxide, hindered amine), slip agents (silicone oil) and combinations thereof.

10. The method of claim 1 , wherein said solution further comprises an additive that provides a beneficial property selected from the group consisting of dyeability, hydrophobicity (i.e., polytetrafluoroethylene (PTFE)), hydrophilicity (i.e., cellulose), friction control, chlorine resistance, degradation resistance (i.e., antioxidants), adhesiveness and/or fusibility (i.e., adhesives and adhesion promoters), flame retardance, antimicrobial behavior (silver, copper, ammonium salt), barrier, electrical conductivity (carbon black), tensile properties, color, luminescence, recyclability, biodegradability, fragrance, tack control (i.e., metal stearates), tactile properties, set-ability, thermal regulation (i.e., phase change materials), nutriceutical, delustrant such as titanium dioxide, stabilizers such as hydrotalcite, a mixture of huntite and hydromagnesite, UV screeners, and combinations thereof.