abstract |
The present invention provides polyether polyols, polyester polyols and polyurethanes having a low residual aldehyde content. The present invention relates to a method for preventing the formation of aldehyde impurities in a polyether polyol, polyester polyol or polyurethane, wherein the polyether polyol, polyester polyol or polyurethane has an effective amount of (a) a phenolic antiresistant. Oxidant, (B) (i) an amine-based antioxidant, Described is a method comprising blending one or more compounds selected from (ii) benzofuran-2-one, and (iii) phosphite or phosphonite, or (iV) mixtures thereof. [Selection figure] None |