Two-component primerless urethane-isocyanurate adhesive compositions having high temperature resistance

A urethane adhesive composition, comprising:

• a urethane adhesive, said urethane adhesive being the reaction product comprising a two-component system of a urethane prepolymer competent and a urethane curative component, said urethane prepolymer component made from a primary hydroxyl terminated intermediate and a polyisocyanate, the equivalent ratio of said polyisocyanate to said hydroxyl terminated intermediate being from about 2 to about 75 so that said prepolymer component contains free NCO groups, and a urethane curative component, said urethane curative component comprising a nitrogen free polyol curative heaving hydroxyl groups therein, a primary polyamine containing amine groups therein, and a trimerization catalyst, the equivalent ratio of said free NCO groups to said hydroxyl groups of said polyol curative and said amine groups of said primary polyamine being at least 1.2, and from about 0.05 to about 7.5 percent by weight of a phosphorus adhesion promoter based upon the total weight of the curative component and the prepolymer component.