Production of polytriazines from aromatic polycyanates with cobalt salt of a carboxylic acid as catalyst

A process for the preparation of a polytriazine consisting essentially of contacting an aromatic polycyanate with a catalytic amount of a cobalt salt of a C.sub.6-20 carboxylic acid at a temperature between about 20.degree. C. and about 200.degree. C. wherein the aromatic polycyanate corresponds to the formula Ar--OCN).sub.n wherein Ar represents an aromatic radical or an aromatic radical interrupted by one or more bridge members and n is a number of from 1 to 7.