Polyurethane elastic yarn and manufacturing method thereof

Elongation, recovery, heat resistance, and excellent chemical resistance, provides a suitable polyurethane elastic yarn in such a stretch fabric or clothing. Together to provide a manufacturing method thereof. An elastic yarn main constituent is composed of polyurethane polymers diol, and a diisocyanate, a polyurethane elastic yarn which contains the compound having between phosphorus and nitrogen atoms bonded to the molecule. Further, the solution of the polyurethane with the addition of compounds having between phosphorus and nitrogen atoms bonded to the molecule, to produce a polyurethane elastic yarn by spinning.