| abstract |
PROBLEM TO BE SOLVED: To provide a polyalkylene oxide having a low degree of unsaturation, a remarkably low viscosity even at a high molecular weight, and excellent handleability. SOLUTION: Molecular weight distribution (Mw / Mn) determined by gel permeation chromatography (GPC) method using polystyrene as a standard substance is 1.029 or less, unsaturation is 0.010 meq / g or less, and number average molecular weight Is a polyalkylene oxide having a molecular weight of 5,000 or more. [Selection figure] None |