Spandex process and product

Details Spandex process and product Spandex process and product

D - Textiles, Paper

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D01F 6/70 (2006.01) C08G 18/10 (2006.01) C08G 18/42 (2006.01) C08G 18/46 (2006.01) C08G 18/66 (2006.01) C08G 18/77 (2006.01) D01F 6/72 (2006.01)

Patent

CA 1092281

ABSTRACT OF THE DISCLOSURE Segmented elastomeric polyester polyurethane- urea spandex filaments having improved resistance to degradation by ultraviolet radiation and chlorine- containing bleaches in which the hard segments contain ureylene groups joined to functionally non-aromatic radicals, at least 25 mole percent of which are Image or Image are provided as well as a process for preparing them from a polymer formed from a polyester glycol, a func- tionally non-aromatic diisocyanate and a functionally non-aromatic diamine. A sufficient amount of the diiso- cyanate and/or diamine having the structure Image or Image wherein R is -NCO or -NH2 is reacted to provide at least 25 mole percent of the sum of the diisocyanate and diamine residues in the hard segment with the structure Image or Image

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