| Blocked aliphatic polyisocyanate based on HDI. In combination with Desmophen® grades to formulate lightfast, one-component stoving polyurethane coatings; as an additive in conventional stoving systems to improve the flexibility and adhesion. Applications: Desmodur® BL 3272 MPA was developed as a hardener for lightfast one-component stoving polyurethane coatings whose stoving temperature can be reduced by the addition of a catalyst, e.g. 0.3 - 1.0 % DBTL, without influencing the storage stability of the ready-to-use formulation. For example, Desmodur® BL 3272 MPA can be combined with Desmophen® T 1665 to formulate high-quality coil coatings with outstanding flexibility and good hardness and resistance to scratching and abrasion. Thanks to the chemical composition of the product, the formulations also have good weather stability comparable with that yielded by using, e.g. Desmodur® BL 3175 or BL 4265. Desmodur® BL 3272 MPA can be used to formulate both primers and top coats with a dry film thickness up to approx. 40 µm. The total film thickness of a two-coat system can thus be 70 µm. Information provided by Covestro |
