Unitechem HALS 770
Unitechem

Unitechem HALS 770

Hindered Amine Light Stabilizer

UNITECHEM LS-770

Low Molecular Weight HALS  |  Light Stabilizer 770
CAS No.  52829-07-9

Unitechem HALS 770 (Light Stabilizer 770) is a low-molecular-weight hindered amine light stabilizer. Its mobility brings it quickly to the surface, so it is especially effective in thick PP sections and for surface protection of PP, ABS, PS and POM parts, and it is often combined with HALS 944 or HALS 622. Compare it with the other grades in our HALS UV stabilizer guide, or request the TDS and a quote.

Chemical Name

Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate
Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate  /  Decanedioic acid, bis(2,2,6,6-tetramethyl-4-piperidinyl) ester

Typical Properties
CAS No. 52829-07-9
Molecular Formula C₂₈H₅₂N₂O₄
Molecular Weight 480.73 g/mol
Appearance White crystalline powder or granules
Melting Point 81 – 85°C
Density @20°C 1.05 g/cm³
Flash Point > 150°C
TGA (5% loss) 228°C
Volatiles ≤ 0.5%
Solubility Acetone 19%, Benzene 46% (w/w @20°C); insoluble in water
Recommended Level 0.1 – 1.0%
Molecular Structure
LS-770 Molecular Structure

Product Features & Applications

Key Features


Low molecular weight HALS delivering high light-stabilizing performance, especially in PP thick sections and surface protection

Broad polymer compatibility — easily dispersed; effective across most commercial polymer systems

Synergistic with antioxidants and UV absorbers — can also be blended with other HALS (e.g., LS-622, LS-944) for enhanced performance

Light stability independent of polymer wall thickness — effective in both thick sections and PP films / tapes

Mobile, low-molecular-weight HALS — moves to the surface, where photo-oxidation starts, which is why it protects thick sections so well

Excellent hydrolytic stability; suitable for crosslinked polyethylene and olefin copolymers

Applications

LS-770 is recommended for use in polypropylene (PP), impact-modified PP (TPO), EPDM, polystyrene (PS / HIPS), ABS, SAN, ASA, polyurethanes (PU), polyamides (PA) and polyacetals (POM). Also suitable for crosslinked polyethylene (XLPE) and olefin copolymers (EVA). Best used in combination with antioxidants and UV absorbers; can be combined with other HALS (e.g., LS-622) for synergistic blends. Particularly recommended for thick-section articles requiring high surface protection.

PP / TPO
EPDM
PS / HIPS
ABS / SAN / ASA
PU (Polyurethane)
PA (Nylon)
POM (Polyacetal)
XLPE
EVA
PP Film & Tape

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