Polyaromatic cyanates

Details Polyaromatic cyanates Polyaromatic cyanates

C - Chemistry, Metallurgy

08

G

260/454.1, 260/2

C08G 73/06 (2006.01) C07C 261/02 (2006.01)

Patent

CA 1255659

-31- ABSTRACT This invention relates to a polyaromatic cya- nate characterized by having the formula Image wherein: Ar is an aromatic radical; B is a C7-20 polycyclic aliphatic radical; D is independently in each occurrence any nonactive hydrogen-containing substituent; q, r and s are independently in each occur- rence the integers 0, 1, 2, or 3; with the proviso that the sum of q, 4 and s is greater than or equal to 2; t is independently in each occurrence an integer of between 0 and 4 inclusive; and x is a number between 0 and 5 inclusive; and the process for their preparation. -31- -32- The process is characterized by first pre- paring 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 bridged hydroxy- -substituted polyaromatic compound with the cyanogen chloride solution. The polyaromatic cyanate compounds of this invention are useful in the preparation of polytriazine compounds which can be used as cure-in- -place resins or fabricated in the form of shaped articles. These polytriazines have good thermal stability, chemical inertness and solvent resistance. -32-

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