Unitechem HALS 944
Unitechem

Unitechem HALS 944

Hindered Amine Light Stabilizer

UNITECHEM LS-944

Polymeric HALS  |  Light Stabilizer 944
CAS No.  70624-18-9 / 71878-19-8

Chemical Name

Poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]}

Typical Properties
CAS No. 70624-18-9 / 71878-19-8
Molecular Formula (C₃₅H₆₈N₈)ₙ
Molecular Weight 2,000 – 3,100 g/mol
Appearance Light yellow granules (dust-free)
Softening Point ≥ 112°C (range: 100–135°C)
TGA (1% loss) 300°C
Recommended Level 0.05 – 1.0%

Molecular Structure
LS-944 Molecular Structure

Product Features & Applications

Key Features


Polymeric, high-molecular-weight HALS with excellent low volatility

Low migration and high extraction resistance — ideal for thin articles, fibers and films

High thermal stability — stable under thermo-oxidative conditions; additional antioxidant effect

Synergistic effect with UV absorbers (e.g., UV-770, UV-3853, LS-622)

FDA approved for food contact applications (21 CFR)

Provides long-term thermal stabilization of polymer matrices

Applications

LS-944 is effective across a broad range of polymers: polyolefins (PE, PP), crosslinked polyethylene (XLPE), olefin copolymers (EVA), TPO, polyurethane fibers, flexible and rigid PVC, styrenic polymers, TPE, and specialty adhesives. Particularly recommended for thin-walled products, films and fibers where low migration is critical.

PP / PE
EVA
XLPE
PS / ABS
PA (Nylon)
PU (Polyurethane)
PVC (Flex & Rigid)
TPO / TPE
Film & Fiber
Specialty Adhesives

Industries
🌿
Agriculture
🚗
Automotive
🧵
Textiles & Fiber
📦
Packaging
🏗️
Building & Construction
⚡
Wire & Cable
🏃
Sports & Outdoor
🔋
Renewable Energy

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