Polyurethane, elastic polyurethane fiber and...

Details Polyurethane, elastic polyurethane fiber and... Polyurethane, elastic polyurethane fiber and...

C - Chemistry, Metallurgy

08

G

402/165, 402/175

C08G 18/42 (2006.01) C08G 18/44 (2006.01) C08G 63/64 (2006.01) D01F 6/70 (2006.01)

Patent

CA 2037606

The present invention is directed to an elastic polyurethane obtained by copolymerization of a polymer diol of a polyesterpolycarbonate diol utilizing a long-chain diol having methyl branches or a mixed diol of a polyester diol and a polycarbonate diol, with an organic diisocyanate and a chain extender. Elastic fibers obtained by spinning said polyurethane have low tensile stress at low tensile strain zone and high tensile stress at high tensile strain zone.

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