UV Tinuvin 866


UV 866 is a high-performance UV stabilizer designed for use in polyurethane systems (eg TPU, CASE, RIM flexible foam applications). UV 866 is particularly effective in thermoplastic polyurethane (TPU) and can also be used in polyurethane-coated floors on tarpaulins as well as in synthetic leather.
Application field
UV 866 provides excellent UV stability for polyurethane systems. The increased potency compared to conventional UV stabilizer systems is particularly pronounced in clear or light-colored TPU applications. UV 866 can also be used on other polymers such as polyamides as well as other engineering plastics including aliphatic polyketones, styrene homopolymers as well as copolymers, elastomers, TPE, TPV and epoxy resins as well as polyolefins and other organic substrates.

Features and advantages

Tinuvin 866 offers superior performance and increased productivity

Compared with traditional light stabilization systems:
• Excellent initial color
• Excellent color retention under UV light
• Enhanced long-term thermal stability
• Single additive solution
• Easy to meter


Specific gravity (at 20°C) 1.21 g/ml
Bulk density 0.40 g/ml
Angle of repose 47°
Solubility (25°C): g/100 g solution
Acetone 7.5
Ethyl acetate 9
Methanol <0.01
Dichloromethane 29
Toluene 13
Volatility (TGA, heating rate 20°C/min in air)
Thermal weight loss % Temperature °C
1.0 215
5.0 255
10.0 270
product form white to light yellow free-flowing powder

Chemical Name:



BASF Tinuvin PUR 866


Tinuvin 866 is typically used at levels between 0.1% and 2.0% depending on the substrate and processing conditions. UV 866 can be used alone or in combination with other functional additives such as antioxidants, drugs (hindered phenols, phosphites) and HALS light stabilizers, often synergistic performance is observed. Performance data for UV 866 is available for various applications.

Handling and Safety: 

For additional handling and toxicological information, please consult us for Maternal Safety Date Sheet.


25kg/plastic bag, 500 kg per pallets. Non-dangerous goods