STABLE LOW-VISCOSITY POLYMER-POLYOL HAVING HYDROXYL NUMBER ≥35, AND SYNTHESIS METHOD THEREOF Russian patent published in 2011 - IPC C08F220/26 C08F220/44 

FIELD: chemistry.

SUBSTANCE: invention relates to low-viscosity polymer-polyols used as components in synthesis of polyurethanes and a method for synthesis of said polymer-polyols. The polymer-polyols have hydroxyl number ≥35, having solid substance content of 45-65 wt % and viscosity less than or equal to be^[2,7c]. The polymer-polyols are a product of reaction of a basic polyol, a stabiliser obtained beforehand and at least two ethylene-unsaturated monomers in the presence of a free-radical polymerisation initiator and at least one polymer-regulating agent. The basic polyol has hydroxyl number between 60 and 400 and functionality between 2 and 4.

EFFECT: obtaining stable polymer-polyols, having low viscosity, high content of solid substance and good filterability.