Spandex fibers made using low unsaturation polyols
June 4, 2013. 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 2929804 3642964 Polyethers and method for making the same Method for drawing polyurethane filaments Thermoset polyurethane prepared from a polypropylene ether triol obtained using a double metal cyanide complex catalyst, ethylene glycol and tolylene diisocyanate Laminates Method for treating polypropylene ether and poly-1,2-butylene ether polyols Process for the polymerization of epoxides Catalysts for the polymerization of epoxides and process for the preparation of such catalysts Polyurethane sealants made using high molecular weight polyols prepared with double metal cyanide catalysts InventorsAssigneeApplicationNo. 073011 filed on 06/04/1993US Classes:528/61, With organic nitrogen reactant which contains two NH, =NH, or HNH groups264/176.1, Shaping by extrusion264/178R, Into a liquid bath264/211.24, Curing or polymerization in the extruder (includes incomplete polymerization or curing, or coagulating rubber)528/62, Organic NH, =NH, or HNH nitrogen-containing reactant contains a heterocyclic ring528/63, Organic NH, =NH, HNH nitrogen reactant contains at least one halogen atom528/64, Organic NH, =NH or HNH nitrogen reactant contains a carbocyclic or aromatic ring528/76With ether or thioether compound containing at least two -C-X-C- groupsExaminersPrimary: Welsh, Maurice J.Attorney, Agent or FirmInternational ClassC08G 018/32AbstractThis invention relates to the production of spandex fibers made from segmented polyurethane(urea)s which are prepared from low unsaturation-containing polyols made by polymerizing alkylene oxides in the presence of a double metal cyanide complex catalyst. With the low unsaturation-containing polyols, spandex fibers can be prepared that have better physical properties than fibers prepared with PTMEG polyols.Field of SearchWith organic nitrogen reactant which contains two NH, =NH, or HNH groupsOrganic NH, =NH, or HNH nitrogen-containing reactant contains a heterocyclic ring Organic NH, =NH, HNH nitrogen reactant contains at least one halogen atom Organic NH, =NH or HNH nitrogen reactant contains a carbocyclic or aromatic ring With ether or thioether compound containing at least two -C-X-C- groups Ether or thioether compound contains three or more -XH groups Shaping by extrusion Into a liquid bath Curing or polymerization in the extruder (includes incomplete polymerization or curing, or coagulating rubber) | |
