What is this polymeric succinate-piperidine HALS and how does it compare across HALS grades?
This product (CAS 65447-77-0) is a polymeric hindered-amine light stabilizer built on a succinate/tetramethylpiperidinol polyester backbone. Like the polymeric triazine HALS, it is a high-MW, extraction-resistant grade for long-term light stability, distinct from the mobile monomeric grades that diffuse faster but migrate more. Bulk quantities are sourced to specification.
- ▸ Long-term light stabilization of polyolefin (PP/PE) films and fibers
- ▸ Low-volatility, extraction-resistant HALS for thin-gauge agricultural and packaging films
- ▸ Weathering protection for TPU, EVA and polyacetal parts
| Grade | Structure class | CAS No. | Mol. wt (g/mol) |
|---|---|---|---|
| Bis(2,2,6,6-tetramethyl-4-piperidyl) Sebacate | Monomeric | 52829-07-9 | 480.7 |
| Bis(1,2,2,6,6-pentamethyl-4-piperidinyl) Sebacate | Monomeric (liquid) | 41556-26-7 | 508.8 |
| Bis-piperidinyl isophthalamide | Monomeric | 42774-15-2 | 442.6 |
| Monomeric C16-18 piperidinyl ester | Monomeric | 167078-06-0 | — |
| Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) Sebacate | Monomeric (NOR) | 129757-67-1 | — |
| Oligomeric Triazine Hindered Amine Light Stabilizer | Oligomeric | 192268-64-7 | 684.1 |
| Oligomeric triazine-piperidine | Oligomeric | 106990-43-6 | 2285.6 |
| Dimethyl Succinate / 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Polymer you are here | Polymeric | 65447-77-0 | — |
| Polymeric Triazine-Hexanediamine Hindered Amine Light Stabilizer, tert-Octylamino Type | Polymeric | 70624-18-9 | — |
How to choose: HALS are 2,2,6,6-tetramethylpiperidine radical scavengers that regenerate to protect polymers and coatings from UV and thermal oxidation. They are grouped by molecular weight and structure, which sets mobility versus permanence: monomeric grades diffuse quickly for fast protection but migrate and extract more readily; oligomeric and polymeric grades resist volatilization and extraction for long-term durability in thick sections and demanding outdoor exposure. The N-alkoxy NOR-HALS grade carries lower basicity, improving compatibility with acid-cure coatings and flame-retarded or agrochemical-exposed systems where basic HALS can be neutralized.
Plastics & polymers solutions · Coatings solutions · Browse all products
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
This product is a polymeric hindered amine light stabilizer — an oligomer of dimethyl succinate and a tetramethylpiperidine alcohol that is essentially non-volatile and resists migration. Identity: CAS 65447-77-0.
What it is
Dimethyl succinate / 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol polymer (CAS 65447-77-0) is a high-molecular-weight polymeric (succinate-piperidine) solid. Its polymeric backbone makes it non-volatile and resistant to extraction and migration, so it stays in the part through hot processing, thin films and water/solvent contact.
How it protects against UV
It scavenges UV-generated radicals through the regenerated nitroxyl cycle. The polymeric structure trades a little initial mobility for long-term permanence — ideal where the stabilizer must not bloom, volatilize or wash out.
Applications
This stabilizer is used in polyolefin films and fibers, thin sections and demanding outdoor parts, often with a UV absorber and a triazine HALS. Compare the polymeric triazine HALS and the monomeric bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate.
Forms, grades and handling
This stabilizer is supplied as a white polymeric powder/granule in bags and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Handle per the current Safety Data Sheet (SDS); each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources this stabilizer direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your polymer, part thickness and service life, the chemical environment (acidic, flame-retarded, agrochemical), and whether you need a complete UV-absorber-plus-HALS package, and we will quote it. See the full range and selection logic in the HALS guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Hindered amine light stabilizer (polymeric) |
| HALS type | Polymeric (high-MW) |
| Permanence | Non-volatile; migration-resistant |
| CAS Number | 65447-77-0 |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU): Not determined from public registry
- EC number: 687-680-8
TSCA Inventory flag XU: a substance exempt from reporting under the Chemical Data Reporting Rule (40 CFR 711) (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is this polymeric HALS used for?
This product (CAS 65447-77-0) is a polymeric hindered amine light stabilizer used in polyolefin films and fibers and thin sections where permanence matters; it is non-volatile and migration-resistant.
Why choose a polymeric HALS?
Polymeric HALS are essentially non-volatile and resist migration and extraction, so they keep protecting thin films, hot-processed parts and items in contact with water or solvents, where monomeric grades could be lost.
How is this HALS supplied and quoted in bulk?
RawSource supplies this HALS in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your polymer, service life and environment.
What is the REACH and TSCA regulatory status of Dimethyl Succinate / 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Polymer (CAS 65447-77-0)?
Dimethyl Succinate / 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Polymer (CAS 65447-77-0) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.