| 摘要 |
<p>A polyurethane polymer which is excellent in oil resistance,weatherability,light resistance,heat resistance,hot−water resistance,hydrolytic resistance,strength,chlorine resistance,and chemical resistance and can be easily and economically produced.It is obtained by polymerizing at least the following two ingredients:(A)a vinyl polymer having a mercapto group at each end of the molecular chain obtained by the reversible addition−elimination chain transfer polymerization method;and(B)an organic polyisocyanate.Also provided are:a polyurethane−based material containing the polyurethane polymer;and elastic polyurethane fibers.</p> |
