Catalyst compositions for trimerizing organic isocyanates

A composition capable of catalytically trimerizing an organic isocyanate said composition comprising a solution of the product obtained by reacting at ambient room temperature, in an inert solvent selected from the group consisting of polar aromatic solvents, halogenated aliphatic solvents, dipolar aprotic solvents, aliphatic alcohols, cycloaliphatic alcohols and organic polyols having a molecular weight from about 60 to about 4000, substantially equimolar proportions of a ketene-aminal and an olefin having the respective formulae (I) and (II) ##STR4## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken separately are independently selected from the group consisting of lower-alkyl, aralkyl, cycloalkyl, and, when taken together as R.sub.1 with R.sub.2 and R.sub.3 with R.sub.4 with the respective nitrogen atoms to which they are attached represent independently heterocyclic groups having 6 or 7 ring atoms, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl, R.sub.7 and R.sub.8 when taken separately are independently selected from the group consisting of hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl, provided that R.sub.7 and R.sub.8 are not both hydrogen at the same time, and, R.sub.7 and R.sub.8, when taken together with the carbon atom to which they are attached represent a cyclic hydrocarbon group having 5 or 6 carbon atoms in the ring, and R.sub.9 and R.sub.10 represent the same or different electron withdrawing groups and wherein the combined weight of said (I) and said (II) is from about 5 to about 95 percent by weight in said solvent.