| abstract |
A low-viscosity polymer polyol capable of producing a polyurethane foam having high flame retardancy without adding a flame retardant is provided. SOLUTION: A dispersion medium comprising a polyol (A) and polymer particles (B) dispersed in the dispersion medium, wherein (B) is ethylenic in the dispersion medium in the presence of the dispersant (D). In the polymer polyol composition (I) formed by polymerizing the unsaturated compound (b), the weight average molecular weight of (B) is 850,000 to 1,300,000 and the glass transition temperature (Tg) is A polymer polyol composition which is 80 to 100 ° C. [Selection figure] None |