Published July 1983
In this report, SRI reviews the technology for making commercial and experimental nonaromatic isocyanates. The commercial isocyanates include hexamethylene diisocyanate, hydrogenated MDI, isophorone diisocyanate, dimer diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, and trimethylhexamethylene diisocyanate. The experimental nonaromatic isocyanates that we reviewed include 1,6,11- undecane triisocyanate, lysine-ethylester triisocyanate, transcyclohexane diisocyanate, and tetramethylxylylene diisocyanate.
We evaluated eight phosgenation processes and one nonphosgenation process. We also evaluated two processes which manufacture respectively an adduct of hexamethylene diisocyanate and a blocked isophorone diisocyanate.
