Other Definitions
isocyanate (dict)
|
IsocyanateIsocyanate is the chemical group of atoms -N=C=O (1 nitrogen, 1 carbon, 1 oxygen), as opposed to cyanate, -O-C≡N, which is formed from cyanogen in the normal -ate manner. An isocyanate is a compound containing the isocyanate group. Examples of isocyanate compounds used in the polymer industry are isomers of toluene diisocyanate (TDI), methylene diphenyl 4,4'-diisocyanate (MDI), and hexamethylene diisocyanate (HDI). Other names for MDI include methylene di-p-phenylene isocyanate, diphenylmethane 4,4'-diisocyanate, and bis-phenyl methylene 4,4'-diisocyanate. They are used as monomer feedstock for polyurethane production. Some of their chemical structures are shown here: Isocyanates such as these can react with an alcohol to produce a urethane linkage. These compounds are reactive and therefore toxic. Exposure to these isocyanates and their vapors should be avoided. See also cyanide, isothiocyanate, methyl isocyanate. External Link Hazards of TDI, MDI, and HDI
|
 |