Self-addition polymerization of polyurethane isocyanate

Isocyanates can undergo self-addition reactions to generate various Autopolymers include dimers, trimers and various multimers, the most important of which are dimerization and trimerization. 1. Dimerization of isocyanatesGenerally speaking, only aromatic isocyanates can self-polymerize to form dimers, while aliphatic isocyanate dimers have not been reported. This is due to the high NCO reactivity of aromatic…