To obtain a compositions stabilized to water content and heat induction reaction by adding a stabilized effective amount of polyphosphroric acid(PPA) to the composition containing an isocyanate (NCO)-functional substance, especially a polyurethane prepolymer.
A stabilized effective amount of PPA (e.g. in an amount of 0.1-10wt.% preferably 2-6wt.% based on the weight of NCO functional substance) is added to or mixed into an NCO functional compound (e.g. an organic monoisocyanate such as phenyl isocyanate or benzyl isocyanate, an organic diisocyanate such as phenylene diisocyanate or toluene diisocyanate and a polyisocyanate, an organic polyisocyanate and an isocyanate-ended prepolymer produced therefrom) to provide the objective composition stabilized to water content and heat induction reaction.
BURDENSKI ROBERT EUGENE
SANTOSUSSO THOMAS MICHAEL