Low Molecular Weight Hindered Amine Light Stabilizer(HALS) Characterization HALS-770 is a hindered amine light stabilizer (HALS) for applications demanding particularly high light stability. It provides excellent light stability for thick sections but can also be used for articles with a high surfacearea such as films and tapes.

Chemical Name Bis (2,2,6,6,-tetramethyl-4-piperidyl) sebaceate

CAS Number 5 2829-07-9

Structure

Applications HALS-770 is recommended to be used in polypropylene, impact modified PP (TPO), EPDM, polystyrene, impact polystyrene, ABS, SAN, ASA and polyurethanes and is also effective in polyamides and Polyacetals.

Features/Benefits HALS-770 is a low molecular weight hindered amind light stabilizer that provides execellent light stability for thick sections and films in the recommended substrates. Benefits of using HALS-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 HALS-770 is less dependent on the polymer's thickness. For this reason the use of HALS-770 also provides good light stability in articles with higher specific surface, e.g. films and tapes.

Combined with other HALS , HALS-770 is part of other synergistic blends, e.g. HALS-791

Guidelines for use The recommended concentrations range between 0.1% an 0.5%, depending on the substrate, processing conditions and application. The optimum level is substrate and application specific. Extensive performance data of HALS -770 in various substrates and for various applications is available upon request.