Patent ID: 8383733

Claim:
A stable, low-viscosity polymer polyol having a hydroxyl number of ≧20, a viscosity that is less than or equal to: be [2.7c] wherein: b represents the base polyol viscosity, and c represents [wt. % solids in polymer polyol/(100−wt. % solids in polymer polyol)], having a solids content of 30% to 65% by weight, based on the total weight of the polymer polyol, comprising the reaction product of: (A) a base polyol having a hydroxyl number of from 60 to 1900, a functionality of 1 to 10, and an equivalent weight of 30 to 900, (B) a preformed stabilizer, and (C) at least one ethylenically unsaturated monomer, in the presence of (D) a free-radical polymerization initiator, and (E) at least one polymer control agent.