Polypropylene (PP)
Selected molded, fiber and compound applications requiring light-stability evaluation.
SUNLIGHT® 770 · CAS 52829-07-9
HALS 770 Supplier in China for Polymer Light Stabilization
HALS 770 is a low-molecular-weight hindered amine light stabilizer used for polymer light stabilization. SUNCHEM supports qualified-source evaluation, documentation, samples, quotation and export supply-chain coordination from China.
Request TDS / COA / Sample / QuotationWhat Is HALS 770?
HALS 770 is a low-molecular-weight, N-H (basic) hindered amine light stabilizer. It helps slow photo-oxidative degradation in polymers by interrupting radical reactions that can otherwise lead to loss of mechanical properties, discoloration and surface deterioration during light exposure.
Unlike additives that are consumed in a single reaction, HALS can participate in a regenerative stabilization cycle. This makes HALS 770 useful when formulators need long-term polymer light stability, subject to compatibility with the resin, pigments, fillers and the complete additive package.
Key Chemical Data
| Product | HALS 770 / SUNLIGHT® 770 |
|---|---|
| CAS Number | 52829-07-9 |
| Chemical Name | Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate |
| Molecular Formula | C28H52N2O4 |
| Molecular Weight | 480.7 g/mol (commonly 481) |
| HALS Type | Low molecular weight, N-H / basic HALS |
| Appearance | White powder; granules are also commercially available |
| Representative Melting Range | 82–87 °C |
How HALS 770 Works
HALS 770 does not mainly protect a polymer by absorbing ultraviolet radiation. Instead, it helps trap radical species formed during photo-oxidation and supports a regenerative stabilization mechanism that slows the degradation cycle.
A UV absorber works earlier in the pathway by absorbing damaging UV energy and converting it into less harmful energy. Because the mechanisms differ, a HALS and a UV absorber may be complementary in a formulation.
Typical Applications
Polyethylene (PE)
Selected films, molded articles and outdoor polyolefin applications.
Engineering Plastics
Selected resin systems where processing and compatibility requirements are suitable.
Plastic Compounds
Compounds and additive packages developed for weathering and light exposure.
Outdoor Polymer Products
Articles requiring retention of appearance and mechanical performance during light exposure.
Suitability depends on polymer type, article thickness, pigments, fillers, acidic components, processing conditions, exposure environment and the complete stabilizer package. Final selection should be validated in the customer’s formulation.
HALS 770 vs Polymeric HALS
What is the main structural difference?
HALS 770 is a low-molecular-weight HALS. Polymeric or oligomeric HALS, such as HALS 944, have substantially higher molecular size.
How can molecular size affect performance?
Lower-molecular-weight HALS may offer efficient distribution in suitable systems, while polymeric HALS are commonly considered where lower migration, lower volatility or better extraction resistance is important.
Is one grade always better?
No. Performance depends on resin compatibility, processing temperature, article thickness, exposure, contact with water or chemicals, and interactions with other formulation components.
How should a buyer choose?
Compare the target polymer, service-life requirement, migration or extraction risk, processing conditions and the complete additive package, then confirm performance through application testing.
HALS 770 is not a universal replacement for polymeric HALS, and polymeric HALS are not automatically superior in every formulation. The suitable option should be selected and validated for the specific application.
Need HALS 770 technical data for your polymer system?
Share the resin, process, application and destination requirements for a focused document and sample discussion.
Can HALS 770 Be Used with UV Absorbers?
Yes. HALS 770 may be combined with a UV absorber because the two additive classes act through different mechanisms. A UV absorber reduces the amount of harmful UV energy reaching the polymer, while HALS 770 helps interrupt photo-oxidative radical reactions.
The appropriate combination and use level depend on the polymer, thickness, pigment system, exposure conditions and performance target. SUNCHEM does not publish a fixed ratio; formulation trials and weathering validation are required. See UV Absorber 326 as a related product reference.
Why Source HALS 770 from SUNCHEM?
Supplier Qualification
We help review suitable Chinese producers against product identity, specification and supply requirements.
Document Coordination
TDS, COA, SDS and specifications can be checked for the selected source and order stage.
Sample Support
Sample availability can be coordinated for qualified evaluation projects.
Export Logistics
We support packaging discussion, export documentation and shipment coordination based on destination requirements.
Technical Communication
We help align polymer, process, exposure and document requirements with the selected supplier.
Alternative Sources
Where appropriate, we can compare qualified supply options and support long-term continuity planning.
HALS 770 FAQ
What is HALS 770 used for?
HALS 770 is used to help slow photo-oxidative degradation and improve light stability in suitable polymer formulations.
Is HALS 770 a UV absorber?
No. HALS 770 mainly acts through radical trapping and a regenerative stabilization mechanism rather than by directly absorbing UV radiation.
What is the CAS number of HALS 770?
The CAS number is 52829-07-9.
What polymers can use HALS 770?
Typical evaluation areas include PP, PE, polyolefins, selected engineering plastics, plastic compounds and outdoor polymer products. Suitability must be confirmed in the final formulation.
What is the difference between HALS 770 and HALS 944?
HALS 770 is a low-molecular-weight HALS, while HALS 944 is an oligomeric or polymeric HALS. Molecular size can affect migration, extraction resistance, volatility and application fit.
Can HALS 770 be combined with a UV absorber?
Yes, the mechanisms can be complementary, but there is no universal ratio. The combination should be optimized and tested for the target polymer and exposure conditions.
How can I request HALS 770 TDS, COA, a sample or quotation?
Send SUNCHEM the product name or CAS number, polymer, application, quantity, destination and required documents so the team can check a suitable supply option.
Related Polymer Stabilization Resources
Request HALS 770 Technical Data, COA, Sample Availability and Quotation
Tell us your polymer system, application, estimated quantity, destination and document requirements. SUNCHEM will help evaluate suitable HALS 770 supply options from qualified Chinese sources.
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