Thermoplastic polyurethane elastomer, process for producing...

Details Thermoplastic polyurethane elastomer, process for producing... Thermoplastic polyurethane elastomer, process for producing...

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) D01F 6/70 (2006.01)

Patent

CA 2112578

A thermoplastic polyurethane elastomer containing a very small amount of small grains, and having a high molecular weight and a narrow molecular-weight distribution. Such high-quality thermoplastic polyurethane is excellent in melt moldability and allows to prevent yarn breakage in producing fibers by melt spinning, for example. Such polyurethane elastomer can be produced by melt-polymerizing a prepolymer and a low-molecular diol at a relatively high temperature in a short period of time. This invention also provides an apparatus for producing the polyurethane elastomer, and fibers formed of said elastomer.

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