Isocyanates Are Classed As Diisocyanate Or Polyisocyanate Based On The Number Of Isocyanate Groups
Isocyanates
Isocyanates are highly reactive compounds with the isocyanate functional group. Isocyanates are classed as diisocyanate or polyisocyanate based on the number of isocyanate groups. Methylene diphenyl diisocyanate, toluene diisocyanate, and naphthalene diisocyanate are examples of diisocyanate chemical compounds with two isocyanate groups. Polyisocyanates are generated from diisocyanates and contain numerous isocyanate groups. Among the most common polyisocyanates are HDI isocyanurate and HDI biuret.
The reaction of amines and phosgene produces isocyanates. Isocyanates can be divided into four categories based on their types: methylene diphenyl diisocyanate, toluene diisocyanate, aliphatic isocyanate, and other segments such as HDI isocyanurate, HDI biuret, and so on. The most common forms of isocyanate are methylene diphenyl isocyanate and toluene diisocyanate. Isocyanates can be divided into five categories based on their applications: stiff foam, flexible foam, insulation, paints and coatings, adhesives, and others such as elastomers and binders. Polyurethanes account for the majority of isocyanate demand worldwide.
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