Light Stabilizer 770

Name: Light Stabilizer 770 ( Low Molecular Weight Hindered Amine Light Stabilizer HALS)
Chemical Name: Bis (2,2,6,6-tetramethyl-4-piperidyl) sebaceate,Tinuvin 770,Photo-stabilizer HS-770
Characterization: Light Stabilizer 770 is a hindered amine light stabilizer HALS for applications demanding particularly high light stability. Tinuvin 770 provides excellent light stability for thick sections but can also be used for articles with a high surfacearea such as films and tapes.
CAS Number: 52829-07-9
Structure: Light stabilizer 770

Molecular weight: 480.74
Physical and chemical properties:

Appearance and behavior	White crystalline powder or granules, odorless
PH-value (1% suspension in water 20~25℃)	9.67
Melting & freezing temperature	80~86℃
Density (20℃)	1.05g/cm3
Flash point	>150℃
Ignition temperature	330℃
Water solubility (20℃)	＜1mg/L
Vapor pressure (20℃)	1.3 E-8 Pa
Partition coefficient (Log Pow, 20~25℃)	0.35

Applications:
light stability agent 770 is recommended to be used in polypropylene, impact modified PP (TPO), EPDM, polystyrene, impact poystyrene, ABS, SAN, ASA and polyurethanes and is also effective in polyamides and polyacetals.
Features & benefits:  
HALS 770 is a low molecular weight hindered amine light stabilizer that provides excellent light stability for thick sections and films in the recommended substrates. Benefits of using Light Stabilizer 770 is the high light-stabilizing performance, particularly in PP thick sections. It has broad compatibility and can be easily dispersed.
Compared to conventional UV-absorbers, the effectiveness of bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate is less dependent on the polymer’s thickness. For this reason the use of  Light Stabilizer 770  also provides good light stability in articles with higher specific surface, e.g.films and tapes.
Combined with other HALS Light Stabilizer 770 is part of other synergistic blends, e.g. Light Stabilizer 791.
Guidelines for use:
The recommended concentrations range between 0.1% and 0.5%, depending on the substrate, processing conditions and application.  The optimum level is substrate and application specific. Extensive performance data of UV-770 in various substrates and for various applications is available upon request.
Handling & safety:

In accordance with good industrial practice, handle with care and unnecessary personal contact. Avoid contact with eyes. Avoid release to the environment. Avoid dust formation and ignition sources.