Applications

TINUVIN® 400-DW (N) is a versatile light stabilizer which can be used in a variety of waterborne coating systems. It has been designed to fulfill the high cost/performance and durability requirements of Interior and exterior industrial, decorative and automotive coatings. The high thermal stability and photo-permanence makes it suitable for coatings exposed to high bake temperatures and/or to extreme environmental conditions. It is not sensitive to metal ions and amines and does not form colored complexes in their presence. TINUVIN® 400-DW (N) is ideal for applications where strong protection from UV-B radiation is required. In general, it fully keeps dry film optics such as self-color, gloss and transparency. Other coating film properties such as water impermeability and blocking resistance, hardness and scratch resistance are not reduced.

Its use is recommended for clear and lightly pigmented coatings such as…

TINUVIN® 400-DW (N) is especially suited for waterborne acrylics and PUD dispersions or where traditional 2-(2-hydroxy-phenyl)-benzotriazole UVAs fail due to metal and/or amine interactions with color formation.

For outdoor applications TINUVIN® 400-DW (N) should be combined with hindered amine light stabilizers (HALS) such as TINUVIN® 123-DW (N) or TINUVIN® 292 to enhance performance. Such synergistic combinations exhibit excellent protection against surface defects like loss of gloss, chalking and cracking, blistering and delaminating as well as preventing color change for both the coating and the substrate.

Features and Benefits

• Encapsulated hydroxyphenyl-triazine UVA with high extinction in the UV-B region
• Low color, low migration
• Minimal interaction with metal catalysts and amine crosslinkers
• Ease of incorporation into water based coatings
• Enables formulating of low/zero VOC coatings
• Excellent photopermanence