Patent ID: 8530693

Claim:
A method for making cyanate esters, comprising: combining benzenecarboxylic acid having one to six carbons (x) with at least one effective reagent to chlorinate said benzenecarboxylic acid to produce a one to six carbons (x=2 or 3) benzenecarbonyl chloride; combining said benzenecarbonyl chloride with at least one alkoxybenzene compound under reaction by Friedel-Crafts conditions to produce a poly(alkoxybenzoyl)benzene having one to six carbons (x=2 or 3), (y=1−5); combining said poly(alkoxybenzoyl)benzene with Wittig reagent to produce a poly(alkoxyphenylvinyl)benzene compound; reducing of said poly(alkoxyphenylvinyl)benzene compound with at least one reducing agent to produce a poly(alkoxyphenylalkyl)benzene; combining said poly(alkoxyphenylalkyl)benzene with at least one demethylating reagent to produce poly(hydroxyphenylalkyl)benzene; and combining said poly(hydroxyphenylalkyl)benzene compound is cyanated by reaction with cyanogen halide (CNBr or CNCl) and base to produce a poly(cyanatophenylalkyl)benzene.