Main > TEXTILES > Fibers > Elastomer Fiber. > Spandex/Elastane PolyUrethane Fiber > Co.: USA. I (Producer/Patents) > Patent > Claims Etc > Claim 1 PolyUrethaneUrea Polymer: > Prodt. of PolyEther Glycol Selected > HomoPolymer of THF & CoPolymer > of THF & 3-Me-THF Monomers; > 1,1-MethyleneBis(4-IsocyanatoBenzen > e) & Diamine Chain Extender, > WHEREIN > 1 DiAmine is > 2-Methyl-1,5-PentaneDiamine (> 50% > when Glycol=Poly(THF) & >55% > when Glycol=THF-3-Me-THF CoPol.) > Claim 2 CoPol. Contg 3-Me-THF > (4-20%). Claim 3 CoPol. MW=3000- > 4000. Claim 4 2-Me-1,5-PentaneDi > Amine (> 80% of Chain Extender) & > Bal.: Ethylenediamine. Claim 5 > 3-Me-THF pres. in CoPol. (10-15%) & > Chain Extender is 2-Me-1,5-Pentane

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