hdi diourea attica al75   about: characterization aliphatic polyisocyanate (hdi biuret). form supplied approx. 75 % in 1-methoxypropylacetate-2/xylene, 1 : 1 used primarily as the hardener component for lightfast two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties. preferred co-reactants are polyacrylate or polyester polyols. specification：  property unit of measurement value...