METHOD FOR PRODUCING CYNOGEN HALIDE, CYANATE ESTER COMPOUND AND METHOD FOR PRODUCING THE SAME, AND RESIN COMPOSITION

摘要

The present invention addresses the problem of providing: an efficient production method for a cyanogen halide with which secondary reactions are inhibited in the production of cyanate ester compounds; and a production method with which a highly pure cyanate ester compound is obtained in high yields. This cyanogen-halide production method is provided with a cyanogen-halide production step in which halogen molecules are brought into contact with an aqueous solution including hydrogen cyanide and/or a metal cyanide, thereby causing the halogen particles to react with the hydrogen cyanide and/or the metal cyanide in the reaction solution to produce a cyanogen halide. In the cyanogen-halide production step: the usage amount of the hydrogen cyanide or the metal cyanide exceeds 1 mol per 1 mol of the halogen molecules; and if the amount of unreacted hydrogen cyanide or unreacted metal cyanide is (A) mol, and the amount of cyanogen halide generated is (B) mol, then the reaction is ended when a state is obtained in which (A):(A)+(B) is within the range 0.00009:1 to 0.2:1.