Tiangang® HS-200A
Hindered amine light stabilizer (hals) · HS-200A
direct alternative to UV 2020, and it is a highly effective radical scavenger that protects organic polymers against degradation caused by exposure to ultraviolet radiation. It is an oligomeric HALS characterized by extremely low volatility, high thermal stability and compatibility with many substrates
In one sentence: An oligomeric hindered amine light stabiliser with very low volatility and high thermal stability, for high-temperature engineering plastics and long residence times.
- Film, flat yarn, nonwoven dosage: 0.1 – 0.5% (source: recommended dosing table on this page)
- Injection mouldings, medium/thick-wall dosage: 0.3 – 1.0% (source: recommended dosing table on this page)
- Fibre and monofilament dosage: 0.3 – 0.8% (source: recommended dosing table on this page)
What it is
Tiangang® HS-200A is a hindered amine light stabilizer (HALS). HALS trap the radicals formed when a polymer photo-oxidises and regenerate in the process, so the protection window is longer than that of a UV absorber, which is consumed as it works.
Technical data
| Chemical name | 1,6-Hexanediamine, N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-, Polymers with 2,4,6-trichloro-1,3,5-triazin, reaction products with N-butyl-1-butanamine and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine |
| CAS number | 192268-64-7 |
| Structure |  |
| Description | Tiangang® HS-200A is a highly effective radical scavenger that protects organic polymers against degradation caused by exposure to ultraviolet radiation. It is an oligomeric HALS characterized by extremely low volatility, high thermal stability and compatibility with many substrates. Its oligomeric structure makes it particularly effective when used in thin section articles such as fiber and film. Tiangang® HS-200A is suited for use in polypropylene, LDPE, HDPE, XPE, EVA and PP blends with elastomers. Tiangang® HS-200A is also effective as an antioxidant for long term thermal stability. Tiangang® HS-200A is in the same class as 2020-type polymeric HALS. |
| Appearance | Molecular weight | Specific gravity, g/ml@ 20oC | Softening range oC | Flash point oC | |
| Tiangang® HS-200A | Pale yellow pastilles | 2600~3400 | 1.01 | 120 ~ 150 | > 160 |
| Tiangang® HS-200A-LD | Pale yellow powder |
| Tiangang® HS-200A | Acetone | Chloroform | Hexane | Benzene | Methyl chloride | Methanol | Water |
| 50 | 50 | 40 | 50 | 50 | 30 | < 0.01 |
| Tiangang® HS-200A | The use of proper protective equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling. Store the product in a cool, dry, well-ventilated area away from incompatible materials. |
| Light Stabilizer Disclaimer | The information supplied is presented in good faith and has been derived from sources believed to be reliable. Since conditions of use are beyond our control, all risks are assumed by the user. No representation is expressed or implied, and nothing herein shall be construed as permission or recommendation to practice a patented invention without license. |
Where it is used, and at what loading
Suitable for polyolefins (PP, PE), polyurethane, polyamide, polyacetal and polyester. Thin and thick parts call for different grades: thin sections suffer from volatilisation and migration, thick sections from surface bloom.
| Film, tape, nonwoven | 0.1 – 0.5% |
|---|---|
| Injection moulded and thick-wall parts | 0.3 – 1.0% |
| Fibre and monofilament | 0.3 – 0.8% |
Figures above are typical industry ranges, not guaranteed values. The actual loading depends on wall thickness, design life and the other additives in the system, and should be established by a loading ladder on the real formulation.
Choosing between similar grades
Three things decide the choice for HS-200A: molecular weight and volatility, basicity, and compatibility with the other components in the system. Oligomeric HALS with very low volatility and high thermal stability — the advantage in high-temperature, long-residence processes.
Frequently asked questions
Is this grade meant for thin or thick parts?
It depends on molecular weight and migration tendency. Low-MW grades diffuse quickly and act early but volatilise and migrate over time; high-MW grades (HS-950, HS-362, BW-10LD) suit long-service outdoor parts. Tiangang offers both, so the choice follows wall thickness and design life.
Is it worth combining with a UV absorber?
Yes, they cover different stages. The UV absorber shields incoming UV energy; the HALS scavenges radicals that have already formed. Agricultural film, automotive exterior and PV backsheet usually need both to reach their design life.
What happens if the loading is too high?
Beyond the compatibility limit the additive blooms to the surface, which wastes material and harms appearance and print adhesion. Protection also stops scaling linearly. Our practice is a loading ladder on the actual system, then fix the cost-performance knee.
The figures and guidance above follow Tiangang's published technical material and common industry practice. For a specific formulation, refer to the batch COA and the technical agreement between the parties.
Certifications
- National High-Tech Enterprise
- Vice Chairman Unit, China Plastics Processing Industry Association (CPPIA)
- Vice Chairman Unit, Agricultural Plastics Branch, China Agricultural Plastics Application Technology Society
- Member, Ageing Methods Subcommittee, National Technical Committee on Plastics (SAC/TC15/CS5)
- Member, Society of the Plastics Industry (SPI), USA
Recommended Products
Products
UV Absorbers
400-094-4362
- Tiangang elected Executive Deputy Director Unit of CPPIA Agricultural Film Committee
- Tiangang wins Leading Award at Beijing TV Innovation Institute finals
- Tiangang concludes CHINAPLAS 2023 on a high note
- First industry-academia-research base in Weishanzhuang Town lands at Tiangang
- Tiangang-Tinaco BUCT scholarship award ceremony 2021-2022