Low smoke, halohydrocarbon-compatible urethane-isocyanurate foam compositions
 Compositions having improved compatibility of halohydrocarbon blowing agents such as trichlorofluoromethane and suitable for curing with polyisocyanates to give low smoke urethane isocyanate foams are described. The compositions include the transesterification products of the residue obtained from the manufacture of dimethyl terephthalate and ethylene glycol or a polyethylene glycol; the transesterification product of that residue and a higher alkylene glycol or higher polyalkylene glycol; and a polyether polyol having an average hydroxyl functionality of at least 4. 
Mobil Oil Corporation
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C08G C08G C08G Y10S C08G
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James J.
Anderson