Spandex elastomers
Patent 5723563 Issued on March 3, 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 3180854 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 InventorsAssigneeApplicationNo. 728923 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 018/10C08G 018/48 AbstractSpandex-type polyurethane/urea segmented elastomers with exceptional physical properties may be prepared by the aliphatic and/or cycloaliphatic diamine chain extension of a solution of isocyanate-terminated polyoxypropylene diol-derived prepolymer wherein the diol component comprises in major part an ultra-low unsaturation polyoxypropylene diol having an unsaturation of less than about 0.010 meq/g and a number average molecular weight greater than 2000 Da. The spandex polymers have commercially desirable percent set and are capable of exceeding the properties of the industry standard PTMEG elastomers in many respects, particularly in elongation and hysteresis.Other References
| |
