| 摘要 |
<p>Polyoxyalkylenepolyols or monools (I) represented by general formula (1) which are characterized in that at least 40 % of the hydroxyl-containing -AO-H groups located at the end are primary hydroxyl-containing groups represented by general formula (2); and a process for producing a ring-opened polymer by ring-opening polymerizing an active hydrogen-containing compound and a cyclic compound with the use of tris(pentafluorophenyl)borane, tris(pentafluoro-phenyl)aluminum, etc., as a catalyst.</p> |
