Spandex elastomers

Details Spandex elastomers Spandex elastomers

1996-10-11

1997-11-25

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 64, 528 76, 528 77, 528906, 560 26, 560115, 560158, 560330, 560336, 560355, 560358, C08G 1812, C08G 1848, C07C26902

Patent

active

056914415

ABSTRACT:
Substitution of from 5 to 50 equivalent percent of an ultra-low unsaturation polyoxypropylene diol for PTMEG in isocyanate-terminated prepolymers used in spandex production is found to lower considerably both prepolymer viscosity and hysteresis while substantially retaining other desirable physical properties. Such products may offer higher fiber production rates than are possible while employing an all PTMEG-derived polymer.

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