Patent ID: 7179882
Filing Date: 2007-02-20
Classification: C08F,C08G

Abstract:
1. A stable, low-viscosity polymer polyol having a solids content of at least about 30% by weight, based on the total weight of the polymer polyol, comprising the reaction product of: (A) a base polyol, (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; wherein the total amount of polymer control agent present in the polymer polyol ranges from greater than about 5% up to about 20% by weight, based on the 100% by weight of the polymer polyol, with the total amount of polymer control agent comprising: (i) from about 0 to about 95% by weight, based on 100% by weight of (i) and (ii), of polymer control agent from the preformed stabilizer and which is carried into the polymer polyol by the preformed stabilizer, and (ii) from greater than about 5 to about 100% by weight, based on 100% by weight of (i) and (ii), of polymer control agent which is added separately from the preformed stabilizer.