Tiangang® HS-950

Name: Tiangang® HS-950
Brand: Tiangang

High Molecular Weight Polymeric HALS · HS-950

A major generational upgrade in high-MW HALS: higher light stability and better cost performance.

In one sentence: A triazine-based polymeric hindered amine light stabiliser with low volatile matter and ash content and a high decomposition temperature, for high-temperature processing.

Melting range: 100 ~ 150 °C (source: spec table on this page)
Specific gravity (20 °C): 1.01 g/cm³ (source: spec table on this page)
Volatile matter: <0.5% (source: spec table on this page)
Ash content: <0.1% (source: spec table on this page)
Onset decomposition temperature: >350 °C (source: spec table on this page)

Core advantages

1. High-MW polymeric structure
High-MW polymeric structure

2. Low volatility, low migration
Low volatility, low migration

3. Extraction resistant, long lasting
Extraction resistant, long lasting

4. Good resin compatibility
Good resin compatibility

Technical data

Chemical composition	Polymeric hindered amine light stabilizer
Applications and properties	Tiangang® HS-950 (Light Stabilizer 950) is a high-performance polymeric hindered amine light stabilizer(HALS), particularly suitable for polyolefins (PP, PE etc.), polyolefin copolymers, nylon, polyacetal and polyester, where it prevents photo-oxidation such as loss of mechanical strength and yellowing, improving weathering resistance. It can also be used in copolymers of polyolefins with EVA, PPO, in polyoxymethylene (POM), nylon (PA), polyurethane (PU), rigid and plasticized PVC (PVC) and PVC blends. It also provides good light stability in styrenics, rubber and adhesives. As a polymeric high-MW HALS, Tiangang® HS-950 has broad resin compatibility and high extraction resistance, and suits systems requiring low volatility and low migration. It is particularly suited to films, tapes and fibers.Tiangang® HS-950 is a major upgrade to the widely used high-MW HALS Tiangang® HS-944, with a narrower molecular weight distribution and higher available nitrogen, and therefore better light stability.

Chemical composition

Polymeric hindered amine light stabilizer

Applications and properties

Tiangang® HS-950 (Light Stabilizer 950) is a high-performance polymeric hindered amine light stabilizer(HALS), particularly suitable for polyolefins (PP, PE etc.), polyolefin copolymers, nylon, polyacetal and polyester, where it prevents photo-oxidation such as loss of mechanical strength and yellowing, improving weathering resistance. It can also be used in copolymers of polyolefins with EVA, PPO, in polyoxymethylene (POM), nylon (PA), polyurethane (PU), rigid and plasticized PVC (PVC) and PVC blends. It also provides good light stability in styrenics, rubber and adhesives.

As a polymeric high-MW HALS, Tiangang® HS-950 has broad resin compatibility and high extraction resistance, and suits systems requiring low volatility and low migration. It is particularly suited to films, tapes and fibers.Tiangang® HS-950 is a major upgrade to the widely used high-MW HALS Tiangang® HS-944, with a narrower molecular weight distribution and higher available nitrogen, and therefore better light stability.

	Appearance	Melt range ^oC	Specific gravity, g/cm³, @ 20^oC	Volatiles, %	Ash, %	Decomposition onset, ^oC
Tiangang® HS-950FD*	Pale yellow dust-free granules	100 ~ 150	1.01	<0.5	<0.1	> 350
Tiangang® HS-950LD	Pale yellow powder

Appearance

Melt range
^oC

Specific gravity,
g/cm³, @ 20^oC

Volatiles,

Ash,

Decomposition onset,

^oC

Tiangang®
HS-950FD*

Pale yellow dust-free granules

100 ~ 150

1.01

<0.5

<0.1

> 350

Tiangang®
HS-950LD

Pale yellow powder

Failure time (criterion: 50%tensile elongation retention)

Sample : LDPE 0.2mmPlaque (Mixing temperature 130130130 °C , plaque temperature160 °C)

Test conditions: US Atlasartificial weathering chamberCi5000, standard: GB/T16422.2-1999 GB/T 13022-1991

Tiangang® HS-950	The product is hygroscopic. Store sealed, dry and away from light below 50°C in a clean environment. Cardboard box/ or drum with inner polyethylene bag, 25 kg/ per box (drum). Other pack sizes are available on request.

Tiangang®
HS-950

The product is hygroscopic. Store sealed, dry and away from light below 50°C in a clean environment.

Cardboard box/ or drum with inner polyethylene bag, 25 kg/ per box (drum). Other pack sizes are available on request.

Frequently asked questions

What is the difference between HS-950 and HS-944?

HS-950 is the next generation of 944 — same high-molecular-weight HALS family, higher light stability. The size of the gain depends on the system and the test method, so verify with a side-by-side run under identical ageing conditions.

Can a formulation already using 944 switch directly?

It can be evaluated as a direct switch, but do two things first: confirm the processing window covers the new grade's melting behaviour, and run a side-by-side ageing comparison to confirm the gain holds in your actual formulation.

Should the loading be adjusted?

Normally start at the existing loading for a like-for-like comparison; no need to increase first. If the goal is longer service life, then run a loading ladder upward.

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.

Related Products

BW-10LD HS-300 HS-330 HS-625

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

Products