POLYAROMATIC CYANATES, A PROCESS FOR PREPARING THE POLYAROMATIC CYANATES, AND POLYTRIAZINES PREPARED FROM THE POLYAROMATIC CYANATES

摘要

A polyaromatic cyanate characterized by having formula (I), wherein: Ar is an aromatic radical; B is a C7-20 polycyclic aliphatic radical; D is independently in each occurence any nonactive hydrogen-containing substituent; q, r and s are independently in each occurrence the integers 0, 1, 2, or 3; with the proviso that the sum of q, r and s is greater than or equal to 2; t is independently in each occurence an integer of between 0 and 4 inclusive; and x is a number between 0 and 5 inclusive. Another aspect of this invention is a process for the preparation of the polyaromatic cyanates. This process is characterized by first preparing cyanogen chloride in situ in a chlorinated hydrocarbon solution. The aqueous layer containing the alkali metal chloride by-product is separated from the chlorinated hydrocarbon layer. Then the polyaromatic cyanate is prepared by contacting a bridge hydroxy-substituted polyaromatic compound with the cyanogen chloride solution. Another aspect of this invention is a polytriazine characterized as being the reaction product of (a) between 1 and 100 mole percent of the polyaromatic cyanate ester of this invention and (b) between 0 and 99 mole percent of one or more cyanate-containing compounds known in the art as useful for the preparation of polytriazines.