Light Stabilizers (HALS)
Light Stabilizer UV-622
Oligomeric HALS (dimethyl succinate / 4-hydroxy-TEMPO polymer)
Oligomeric HALS for thin films and fibers — extraction-resistant and food-contact friendly.
Product Description
UV-622 is an oligomeric hindered amine light stabilizer with molecular weight around 3,000–4,000. This oligomeric structure dramatically reduces volatility and migration compared to monomeric HALS, making it the stabilizer of choice for thin films, fibers and food packaging where extractables are regulated.
Its polymeric backbone also provides processing stabilization, protecting polyolefins during extrusion. In LLDPE greenhouse films and EVA agricultural covers, UV-622 based systems survive multiple seasons even under pesticide pressure, especially when combined with the chelated systems used against agrochemical deactivation.
Typical loadings are 0.1–1.0 wt% depending on application lifetime. Aolong UV-622 is supplied as free-flowing granular powder for clean, dust-controlled masterbatch production.
Key Features
- Low volatility and migration — ideal for films and fibers
- Extraction-resistant for food packaging and outdoor use
- Combined processing and light stabilization
- Free-flowing granules for clean handling
Applications
- LLDPE and LDPE agricultural greenhouse films
- PP fibers, nonwovens and geotextiles
- EVA films and flexible packaging
- Polyolefin thick sections and crates
- TPE/TPU articles with outdoor exposure
Specifications
| CAS No. | 65447-77-0 |
|---|---|
| Molecular Formula | (C15H27NO3)n |
| Molecular Weight | 3100–4000 (oligomeric) |
| Appearance | White to off-white granular powder |
| Softening Range | 55 – 70 °C |
| Molecular Weight (Mn) | 3,000 – 4,000 |
| Volatility (105 °C, 2 h) | ≤ 1.0% |
| Ash Content | ≤ 0.1% |
Packaging & Storage
25 kg fiber drum with PE liner. Store cool, dry and protected from light; shelf life 24 months in original sealed packaging.
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