Patent ID: 8604094

Claim:
A flexible polyurethane foam comprising the reaction product of: an isocyanate component which is substantially free of toluene diisocyanate and comprises; polymeric diphenylmethane diisocyanate in an amount of from about 1 to about 30 parts by weight based on 100 parts by weight of said isocyanate component, and a monomeric diphenylmethane diisocyanate component in an amount of from about 70 to about 99 parts by weight based on 100 parts by weight of said isocyanate component and comprising 2,4′-diphenylmethane diisocyanate and 4,4′-diphenylmethane diisocyanate, wherein said 2,4′-diphenylmethane diisocyanate is present in said isocyanate component in an amount of from about 30 to about 48 parts by weight and said 4,4′-diphenylmethane diisocyanate is present in said isocyanate component in an amount of from about 22 to about 69 parts by weight, each based on 100 parts by weight of said isocyanate component, and an isocyanate-reactive component comprising; a polyether triol having a molecular weight of from about 700 to about 20,000 and a plurality of terminal caps which are substantially free of ethylene oxide groups; wherein said polyether triol is present in said isocyanate-reactive component in an amount of from about 20 to about 100 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component; in the presence of a blowing agent; wherein said flexible polyurethane foam is substantially free of supplemental flame retardant additives and exhibits flame retardance under flammability tests according to California Technical Bulletin 117 regulations.