polyisotsyanaatin
Polyisocyanates are polymers that contain multiple isocyanate functional groups within their molecular structure. These groups, characterized by the N=C=O moiety, are highly reactive and readily participate in addition reactions, particularly with compounds containing active hydrogen atoms, such as hydroxyl (-OH), amine (-NH2), and carboxyl (-COOH) groups. This reactivity is the cornerstone of their widespread application.
The primary use of polyisocyanates is as a key component in the production of polyurethanes. When reacted
Common types of polyisocyanates include toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI). TDI is often