Tinuvin 622 is a non-volatile, polymeric hindered amine light stabilizer (HALS). It offers strong UV stabilization for polyolefins, polyamides, and engineering plastics, with excellent thermal resistance and low migration.
Due to its polymeric nature, Tinuvin 622 is especially suitable for long-term weather-resistant applications including fibers, films, injection molding, and automotive plastics.
| Property | Typical Value |
|---|---|
| Chemical Type | Polymeric HALS (N-substituted hindered amine) |
| CAS No. | 65447-77-0 / 70624-18-9 |
| Appearance | White to light yellow granular or powder |
| Molecular Weight | High |
| Volatility | Very low |
| Processing Stability | Up to 300 °C |
| Recommended Dosage | 0.1 – 1.0 phr |
| Customer Concern | Tinuvin 622 Solution |
|---|---|
| UV cracking and fading over time | Long-term protection under sunlight and weather |
| Additive migration and blooming | Polymeric structure reduces migration |
| Food and hygiene product compliance | Low volatility and toxicity |
| Fiber discoloration and degradation | Ensures lightfastness and tensile strength |
| Compatibility with pigments or fillers | Excellent dispersion and processing stability |
Q1: How is Tinuvin 622 different from Tinuvin 770?
Tinuvin 622 is a polymeric HALS with lower volatility and longer service life, especially for fiber, film, and food-grade materials.
Q2: Can it be used in high-temperature applications?
Yes, Tinuvin 622 withstands processing temperatures up to 300 °C without degradation.
Q3: Is Tinuvin 622 suitable for food packaging?
Yes, its low migration makes it ideal for packaging that may contact food (confirm with local regulations).
Q4: What is its shelf life and storage condition?
Shelf life is 24 months in sealed packaging, stored in cool and dry conditions.
Q5: Can it be combined with UV absorbers like UV-531?
Yes. It works well with UV absorbers for enhanced UV protection in challenging outdoor conditions.
