Be sure to use a blocking agent when using blocked isocyanate
The blocking agent refers to the monofunctional active hydrogen substance used to block the reactive isocyanate. The reactive isocyanate group of this type of coating is blocked by the blocking agent , stable at room temperature and can be stored for a long time. Only under high-temperature heating can the blocking agent be released and the isocyanate can undergo a curing reaction with the hydroxyl group. Sealed polyurethane coating has high hardness, strong adhesion, and good scratch resistance. The coating film is not easy to peel off and can be self-soldered. It has good solvent resistance and chemical resistance and excellent electrical insulation. Mainly used as coil coatings, OEM mid-coat coatings, powder coatings, electrophoretic coatings, and enameled wire coatings.