| abstract |
If the polymer polyol is to be produced at a high concentration, there is a problem that the particles are agglomerated during monomer polymerization to form polymer fine particles, an aggregate is easily generated, and the storage stability of the polymer polyol is deteriorated. In a method for producing a polymer polyol in which at least one ethylenically unsaturated monomer is polymerized in a polyol together with a seed particle dispersion, the seed particle dispersion is in the presence of an ethylenically unsaturated macromonomer, a solvent, and a chain transfer agent. Thus, a reaction product of a specific polyol, an isocyanate compound, and an ethylenically unsaturated monomer having a hydroxyl group is used as the ethylenically unsaturated macromonomer. |