Polymer/polyols having improved combustion resistance and intrinsic viscosity, methods of making same and polyurethanes prepared therefrom

摘要: A normally liquid, stable polymer/polyol composition which imparts improved combustion resistance to polyurethane foams prepared therefrom while retaining satisfactory foam tensile properties are formed by polymerizing in the presence of a free radical catalyst and essential absence an alkyl mercaptan, (1) from about 25 60 weight percent ethylenically unsaturated monomer or monomers, for example, mixture acrylonitrile styrene ratio respectively 25:75 0:100, dissolved dispersed (2) 40 75 polyol comprising base having hydroxyl number less than 150, wherein polymer is characterized crosslinking coefficient 55 intrinsic viscosity at least 0.30. process treating resulting reduce product essentially indigenous system compositions this type disclosed, as stabilizer precursor assists stabilizing compositions.