Reactivity of polyurethane isocyanates

1. Reaction mechanism of polyurethane isocyanateOrganic isocyanate compounds contain highly unsaturated isocyanate groups (NCO, Structural formula – NC, so the chemical properties are very active.Due to the large electron cloud density on oxygen and nitrogen atoms, their electronegativity is large, and the oxygen atom of the NCO group It has the highest electronegativity and is…