hdi trimer  hi-190 about: aliphatic polyisocyanate based on isocyanurate-modified hexamethylene diisocyanate (hdi). exhibits excellent weather and chemical resistance, non-yellowing and physical properties. it is an approximately 90% solids solution in a 1:1 blend of n-butyl acetate and solvesso 100. can be diluted with esters, ketones, glycolether acetates or with aromatic hydrocarbons. used to crosslink most hydroxy-containing resins and...