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),…