hdi closed covesro bl 3175 sn   about: blocked aliphatic hdi-polyisocyanate. with desmophen® grades to formulate lightfast one-component polyurethane stoving coatings; as an additive to improve flexibility and adhesion. product types: hdi pic aliphatic polyisocyanate crosslinkers polyisocyanate hardeners polyisocyanurate isocyanate material: coatings, paints & inks: solventborne, flexible, thermally resistant, elastic general characterization: blocked, aliphatic polyisocyanate...