HALS (Hindered Amine Light Stabilizer)
CAS Number: 52829-07-9
Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (HALS-770) is a low-molecular-weight hindered amine light stabilizer that quenches free radicals generated by UV radiation in coatings, plastics, and fibers. Unlike UV absorbers, HALS interrupts the photo-oxidation chain reaction without directly absorbing UV light, and is regenerated during the stabilization cycle for sustained long-term performance. It is widely used in outdoor applications where extended weathering resistance is required.
Technical Specifications
| purity | ≥ 98% |
| appearance | White to off-white powder |
| ash content | ≤ 0.1% |
| melting point | 81 – 86°C |
| molecular weight | 480.7 g/mol |
Applications
- Outdoor polyolefin films and agricultural films
- Automotive exterior coatings and clearcoats
- Textile fibers (polyamide, polyester)
- Outdoor furniture and garden products
- Exterior architectural coatings
Key Features
- Radical scavenging mechanism — does not absorb UV directly
- Self-regenerating during stabilization cycle for long-term protection
- Excellent performance in thin coatings and films
- Synergistic with UV absorbers for superior protection
- FDA compliant — suitable for food contact applications
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CAS Number
52829-07-9
Category
Light / Heat StabilizersAvailability
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