TINUVIN® 477 is a liquid, high performance UV absorber developed for solventborne and liquid UV curable coatings. Its high thermal stability and photo-permanence makes it suitable for coatings exposed to high bake temperatures and/or to extreme environmental conditions. It fulfills the long-term durability requirements of high performance decorative and industrial coatings.

TINUVIN® 477 is a broad band absorbing UV absorber with high extinction particularly in the UVA range (320-390 nm) designed to block UVA light from sun and artificial lighting sources and protect substrate and contents or ingredients against damage and value loss.

For indoor varnishes, it stabilizes the color of substrates such as natural or stained wood as well as tinted or printed materials. It is used for content protection in coatings on transparent packaging films, sheets and containers.

For outdoor applications, the performance provided by TINUVIN® 477 is enhanced when used in combination with HALS stabilizers such as TINUVIN® 123 or TINUVIN® 292 or with stabilizers from the TINUVIN® 5000 series.

TINUVIN® 477 is recommended for clear and pigmented systems such as:

• Exterior wood coatings and penetrating finishes (I.e. LO Alkyd based clear and pigmented systems)
• Indoor solventborne and UV cured wood coatings, waxes and wood care products
• Polishes, rejuvenators for plastics and leather
• Coatings on plastics (PC, PMMA, PET, sheets, films, bottles, packaging)
• Coatings on vinyl (displays, liners, tarpaulins)
• OVP UV blocking varnishes on prints (metal, board, paper, laminates)
• Glass coatings and glass bonding layers
• Adhesives

For waterborne systems, it is recommended to use the solvent-free aqueous TINUVIN® 477-DW dispersion (containing 20% active TINUVIN® 477). Combinations with other stabilizer dispersions, UV absorbers such as TINUVIN® 99-DW or TINUVIN® 400-DW as well as HALS such as TINUVIN® 123-DW are possible in all proportions and may help to design fine-tuned stabilizer packages and deliver optimized protection performance.
Possible interactions of TINUVIN® 477 (color change) under high pH conditions should be carefully evaluated.