The market concentration of hexamethylene diisocyanate (HDI) is high and the domestic market demand is huge.

hexamethylene diisocyanate (hdi), also known as hexamethylene diisocyanate, is a type of aliphatic isocyanate that appears as a colorless or slightly yellow transparent liquid with a slightly pungent odor and is easy to burn. hdi monomers are highly toxic and are generally prepared into hdi derivatives. common products include hdi biuret (hdb), hdi trimer (hdt),…