China Suppliers NOR152 Off-White Powder - High-Quality Products from Our Factory (CAS 191743-75-6)

NOR 152 is a high-performance reactive light stabilizer, specifically designed to address the migration-induced depletion of stabilizers and subsequent premature degradation of coating films. This migration issue is particularly pronounced in plastic coatings, and can also occur in varnishes or wet-on-wet primer coatings. Featuring reactive primary hydroxyl groups, NOR 152 can covalently bind to key components in various coating systems—such as melamine and isocyanate crosslinkers—anchoring itself firmly within the coating matrix and thus effectively preventing migration.

NOR 152 boasts excellent compatibility and long-term stabilization performance in polar, highly cross-linked coating systems, where conventional hindered amine light stabilizers (HALS) often exhibit poor compatibility. These applicable systems include polyester or acrylic urethane coatings, as well as highly cross-linked polyester or acrylic melamine coating systems. Thanks to its low alkalinity, this product also delivers reliable performance in thermosetting systems, such as traditional acid-catalyzed automotive and coil coatings, and is suitable for thermoplastic acrylics and oxidative drying alkyd resins used in industrial and decorative paints and varnishes.

• Coating systems: 1% to 2% of resin solids
• For varnishes or colored coatings susceptible to fading or discoloration, or for use on photosensitive substrates, synergistic stabilization effects can be achieved by compounding NOR 152 with 1% to 3% of UV absorbers.

The solid form of NOR 152 can be directly added to the polyhydroxyl component of two-component polyurethane resins or incorporated into one-component coating systems, with thorough mixing required prior to application. Alternatively, it can be pre-dissolved in a suitable solvent before being blended into the coating formulation.