METHOD FOR THE PREPARATION OF POLYURETHANE FILAMENTS WITH HEAT RESISTANT AND ANTI-CHLORINE PROPERTY

摘要

A diol compound 1 mole consisting of 90-95 mole % of a high molecula weight diol and of 5-10 mole % of a low molecular weight diol is preliminary polymerized with a diisocyanate compound in the ratio of 1.25-2.5 mol, and is mixed with a solvent for producing the solution of the preliminary polymer. Then using the preliminary polymer in the ratio of 60-98 mole %, subjecting an isocyanate of its tip to the chain growth, a diamine compound is obtained in a viscosity of 500-4,000 poise suitable for spinning, having a monoamine compound chain stopped using a diamine compound in the ratio of 1-30 mole % from among the total amount.