Process for the production of highly pure, polyfunctional...

Details Process for the production of highly pure, polyfunctional... Process for the production of highly pure, polyfunctional...

C - Chemistry, Metallurgy

08

G

260/454.1

C08G 73/06 (2006.01)

Patent

CA 1063129

A PROCESS FOR THE PRODUCTION OF HIGHLY PURE, POLYFUNCTIONAL CYANIC ACID ESTERS ABSTRACT OF THE DISCLOSURE Highly pure aromatic polyfunctional cyanic acid esters having a high stability in storage and being extraordinarily suitable for use as starting compound for the production of plastics by cyclopoly-tri-merization are obtained by a special process. A di- or polytrialkyl ammonium phenolate of the formula: Image in which Ar represents an optionally substituted aromatic radical, R1,R2 and R3 are the same or different and each represents a linear or branched alkyl radical, and n is a number from 2 to 6, is reacted at a temperature in the range of from -40 to +65°C in the presence of a trialkyl amine and an organic sovent with an excess of cyanogen halide. The excess of cyanogen halide is up to 80% by weight, based on the total weight of the phenolate and the trialkyl amine.

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