Abstract
SynopsisXylylene diisocyanate (XDI) has both characteristics of an aromatic and an aliphatic polyisocyanate. Polyisocyante adduct was adopted for hardener of coatings. It is particularly interesting that the reactivity of XDI adduct with alcohol is higher than that of toluene diisocyanate (TDI) adduct. In addition, polyurethane coating that prepared from XDI adduct shows excellent stain resistance and metal adhesion compared to those of hexamethylene diisocyanate (HDI) Biuret. XDI adduct is the specialty polyisocyanate with high reactivity, polarity and refractive index, so it can be applied to various uses including coating, adhesive, sealant, elastomer and plastic lens.
