Spandex elastomers
Patent 5708118 Issued on January 13, 1998. Estimated Expiration Date: 
October 11, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 11, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3384623 3393243 3427256 3427334 3427335 3483167 3829505 Polyethers and method for making the same Urethane elastomers prepared from polyethers having a certain molecular weight distribution Thermoplastic polyurethanes prepared with small amounts of monohydric alcohols InventorsApplicationNo. 728920 filed on 10/11/1996US Classes:528/61, With organic nitrogen reactant which contains two NH, =NH, or HNH groups528/64, Organic NH, =NH or HNH nitrogen reactant contains a carbocyclic or aromatic ring528/76, With ether or thioether compound containing at least two -C-X-C- groups528/906FIBER OR ELASTOMER PREPARED FROM AN ISOCYANATE REACTANTExaminersPrimary: Sergent, RabonAttorney, Agent or FirmInternational ClassesC08G 018/12C08G 018/48 AbstractSpandex-type segmented polyurethane/urea elastomers having exceptional elongation, hysteresis, recovery, and other physical properties are prepared by the amine chain extension of an isocyanate-terminated prepolymer prepared by the reaction of a stoichiometric excess of isocyanate with a polyol blend comprising a low molecular weight diol having a molecular weight below 750 Da with a high molecular weight glycol which may be a 1500 Da to 20,000 Da molecular weight, ultra-low unsaturation polyoxypropylene glycol with an unsaturation of less than about 0.010 meq/g.Other References
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