Spandex Manufacture, 1970 |
Common terms and phrases
active hydrogen added addition adipic acid aliphatic alkyl alkylene amino groups aromatic diisocyanate bischloroformate carbon atoms chain extending chain lengthening agents component containing copolymer cross-linking cycloaliphatic denier derived difunctional dimethyl dimethylformamide diol dissolved divalent elastic fibers elastomers elongation end groups ester ether ethyl ethylene diamine example extruded fiber-forming molecular weight formamide formula grams hard segments heated high melting homopolymer hydrazide hydroxyl groups isocyanate isocyanate groups low molecular weight melting point minutes mixture modulus molecular weight molecular weight range N-alkylated polyurethane NCO groups obtained organic diisocyanate organic radical oxide percent piperazine poly polyester polyether glycol polyisocyanate polymer polymer chain polymerization polyurethane preferred prepolymer properties reactants reaction reactive repeating unit room temperature segmented polymer soft segments solubility solvent spandex spinning solution spun stirring stress decay substantially linear suitable tensile recovery terminal tertiary amine thread titanium dioxide U.S. Patent urea urethane urethane linkages viscosity yarn