Tiangang® HS-9611

Tiangang® HS-9611

Uv absorber (uva) · HS-9611

highly efficient UV stabilization system that features extraordinary UV stabilization efficiency, low color, low volatility, and highly extraction resistant. It is suitable for use in a variety of polymers. It also serves as a long-term heat stabilizer

In one sentence: A UV absorber with an 80 – 100 °C softening range, a 10% weight-loss temperature above 340 °C and low insolubles.

  • Insolubles: <0.25% (source: spec table on this page)
  • Softening range: 80 ~ 100 °C (source: spec table on this page)
  • Temperature at 10% weight loss: >340 °C (source: spec table on this page)
  • Transparent film and sheet dosage: 0.2 – 0.5% (source: recommended dosing table on this page)

What it is

Tiangang® HS-9611 is a UV absorber (UVA). A UV absorber takes in 280–400 nm radiation and dissipates it as heat, acting as a filter layer at the surface. It does not scavenge radicals itself.

Technical data

Chemical NameHindered amine derivative
DescriptionTiangang® HS-9611 is a highly efficient UV stabilization system that features extraordinary UV stabilization efficiency, low color, low volatility, and highly extraction resistant. It is suitable for use in a variety of polymers. It also serves as a long-term heat stabilizer.
AppearanceInsolubles,
%		Softening range
oC		Weight Loss, 10%, oCVolatiles,
%		Ash,
%
Tiangang® HS-9611FDPale yellow pastilles< 0.2580 ~ 100> 340< 0.5< 0.1
Tiangang® HS-9611LDPale yellow powder
Tiangang® HS-9611The 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.
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

The difference from HALS is where it works: a UV absorber depends on its own absorption cross-section, so it is most visible in transparent film, coatings and sheet with a long optical path. In carbon-black or opaque systems its contribution is limited.

Transparent film and sheet0.2 – 0.5%
Moulded parts and profiles0.3 – 0.6%
Coatings (on dry film)1.0 – 3.0%

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-9611: molecular weight and volatility, basicity, and compatibility with the other components in the system. A UV stabiliser system rather than a single HALS: low colour, low volatility, extraction resistant — simpler than blending your own for light-coloured, long-life parts.

Frequently asked questions

Benzotriazole or benzophenone?

Benzophenones such as UV-531 are cost-effective and compatible but absorb at shorter wavelengths and migrate over time. Benzotriazoles (UV-326, 327, 328) absorb more strongly and resist migration, which is why engineering plastics mostly use them. Triazines (UV-570, UV-630) give the highest heat and weathering resistance for high-temperature processing and demanding outdoor parts.

Why pick a high-temperature grade for engineering plastics?

Engineering plastics are processed at 250–300 °C. A standard UV absorber volatilises or decomposes in that window, losing active content and contaminating the tool. High-temperature grades have a higher decomposition temperature and survive the process.

What should be watched when combining with HALS?

Acid-base interaction. Some UV absorbers and highly basic HALS interfere with each other in the same system and lose synergy. Our T-series packs are formulated with both sides of that balance in mind.

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.

Technical reviewTiangang Technical CenterVersion2026-11-07
Specifications and application notes on this page are compiled from Tiangang's published technical data. Actual values are governed by the COA shipped with each lot and the technical agreement confirmed by both 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

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