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Boston: McGraw-Hill, In some embodiments, the combined amount of hexanal, nonanal, and decanal in the oligomeric polyol or polyurethane foam is about 80 ppm or less,. Typically, the neutralizing agent will be an anionic exchange resin. Representative unsaturated fatty acids include, for example, C 1, C 1, C 2, and C 3 unsaturated fatty acids. Sotirov, S.

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