Main > TEXTILES > Fibers > Elastomer Fiber. > Spandex/Elastane PolyUrethane Fiber > Co.: USA. I (Producer/Patents) > Patent > Claims Etc > Claim 1 Spandex Heat-Set Efficiency > at 175-190C of .gtoreq.85% Reaction > Prodt.: (A) THF-3-Me-THF CoPol. > Glycol, (B) Mixt. of > 1-Isocyanato-4-[(4-IsocyanatoPh)Me] > Benzene & 23-55% of 1-Isocyanato-2- > [(4-IsocyanatoPh)Me]Benzene. (C) > Chain Extender. Claim 2 > Unload Power=.gtoreq.0.020 dN/tex. > Claims 3,4 (C) Select: > EthyleneDiamine, 1,4-ButaneDiamine

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Etc. resp. Claim 6 Spandex Mfg.:

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