TINUVIN® 770

Tinuvin 770 is a low molecular weight hindered amine light stabilizer (HALS) designed for applications that require high light stability. This product is suitable for use in a wide range of polymers, including polypropylene, impact modified polypropylene (TPO), EPDM, polystyrene, impact polystyrene, ABS, SAN, ASA, polyurethanes, polyamides, and polyacetals. It is particularly effective in providing light stability for thick sections of polypropylene, as well as for articles with a high surface area, such as films and tapes.

Key Properties of Tinuvin 770:

1. Chemical name: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebaceate
2. CAS number: 52829-07-9
3. Molecular weight: 481 g/mol
4. Appearance: white crystalline granules

Applications:
Tinuvin 770 is recommended for use in various polymers, including polypropylene, impact modified polypropylene (TPO), EPDM, polystyrene, impact polystyrene, ABS, SAN, ASA, polyurethanes, and polyamides. It is effective in providing excellent light stability for thick sections of polypropylene and can be used in articles with a high surface area, such as films and tapes.

Features/Benefits:
The use of Tinuvin 770 offers high light-stabilizing performance, particularly in polypropylene thick sections to protect the surface. It can be easily dispersed and has broad compatibility with various substrates. Compared to UV absorbers, the effectiveness of HALS like Tinuvin 770 is not dependent on the polymer's thickness, making it suitable for films and tapes as well.

Recommended Concentrations:
The recommended concentrations of Tinuvin 770 range between 0.1% and 1.0%, depending on the substrate, processing conditions, and application. The optimum level is substrate and application specific, and extensive performance data is available upon request.

Physical Properties:

• Melting range: 81 – 85 °C
• Flashpoint (DIN 51584): > 150 °C
• Specific gravity (20 °C): 1.05 g/cm3
• Vapor pressure (20 °C): 1.3 E-8 Pa
• Bulk density: 470 – 510 g/l

Handling & Safety:
Tinuvin 770 should be handled with care and avoided unnecessary personal contact. It is important to use adequate ventilation and avoid release to the environment. Avoid dust formation and ignition sources.

In conclusion, Tinuvin 770 is a versatile and effective HALS that provides high light stability for a wide range of polymers, making it suitable for various applications, including polypropylene, films, and tapes.