Hexamethylene diisocyanate → Vinyl isocyanate

Participants

Reaction Conditions

Reaction Steps

A solution of 57 parts of 1-chloroethylcarbamic acid chloride in 100 parts by volume of hexamethylene diisocyanate is introduced slowly in the course of half an hour, at 100° C., under the surface of 572 parts of hexamethylene diisocyanate. At the same time nitrogen is blown through the solution and the exit gas is cooled to -100° C. in a cold trap. After the reaction, the reaction mixture is subjected to fractional distillation. 10.2 parts (36.8% of theory) of vinyl isocyanate of boiling point 38.5° C./1013 mbar and 6.8 parts (16.1% of theory) of 1-chloroethyl isocyanate of boiling point 92° C./1013 mbar are obtained.

Provenance & Evidence