Tiangang® HS-962

Synergistic Stabilizer Package · HS-962

Light Stabilizer Tiangang® HS-962 is a s

In one sentence: A composite of polymeric high-molecular-weight hindered amines (equivalent to Light Stabiliser 783) with good processing heat stability and water extraction resistance.

  • Density: 618 g/L (source: spec table on this page)
  • Melting range: 55~140 °C (source: spec table on this page)
  • Flash point: >192 °C (source: spec table on this page)
  • Molecular weight (HS-944 component): Mn = 2100 – 3000 g/mol (source: spec table on this page)
  • Packaging: 25 kg per box (drum) (source: packaging note on this page)

Key Advantages

a) HALS + antioxidant synergy
HALS + antioxidant synergy
b) Staged aging interception
Staged aging interception
c) Dual protection in processing & service
Dual protection in processing & service
d) Pre-blended convenience
Pre-blended convenience

Technical Data

Chemical name Tiangang® HS-944:  Poly-{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-
piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]}, and
Tiangang® BW-10LD (622): Butanedioic acid, dimethylester, polymer with 4-hydroxy-2,2,6,6-
tetramethyl-1-piperidine ethanol
CAS number Preparation: 71878-19-8/70624-18-9 (US) and 65447-77-0
Structure Technical Data
Technical Data
Description
 		 Tiangang® HS-962 is a synergistic mixture of Tiangang® BW-10LD and Tiangang® HS-944. It is a highly effective radical scavenger belonging to the Hindered Amine Light Stabilizers (HALS) family of stabilizers. It is a versatile UV stabilizer with high extraction resistance, low fading and low pigment interaction, and particularly well suited for LDPE, LLDPE, HDPE films, tapes and thick sections and for PP in fibers and films. It is also the product of choice for thick sections where indirect food contact approval is required.
　 Appearance Density
g/L		 Melting range
°C		 Flash point
°C
Tiangang® HS-962 Off-white solid pastilles 618 55~140 > 192
Tiangang® HS-962 Acetone Chloroform Hexane Benzene Methyl chloride Methanol Water
50 50 40 50 50 30 < 0.01
Tiangang® HS-962 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.
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.

Upgrade path

See Tiangang® HS-362. For film applications HS-362 is the more common choice: a proprietary blend of polymeric high-MW HALS, with the ratio tuned for processing stability and extraction resistance in thin sections. Formulations already running 783 can be compared side by side with HS-362.

Thick parts and general applications can stay on the 783 system; film, tape and nonwoven should evaluate HS-362 first.

How the whole film formulation fits together

One grade rarely tells the whole story. Greenhouse film is usually three-layer co-extrusion: the outer layer carries the UV package, the middle layer holds mechanical strength, the inner layer faces sulfur and chlorine. Mulch film is only 8–15 µm thick, so mechanical integrity and controlled degradation must be met at the same time. Nonwoven and shade net age for different reasons again. Tiangang has set out the ageing mechanisms, the choice between xenon and QUV testing, and a grade-by-grade table for all six covering categories in one document: anti-ageing solutions for agricultural covering materials.

Frequently asked questions

Is HS-962 the same as light stabilizer 783?

Yes. HS-962 corresponds to 783: a blended product of two polymeric high-molecular-weight HALS, balancing processing thermal stability with resistance to water extraction.

Why a blend rather than a single component?

A single HALS usually has to trade processing thermal stability against long-term light stability. A blend lets the two mechanisms complement each other, covering both the processing stage and the service stage.

For film applications, which grade goes further?

HS-362 is the more common choice for film — a proprietary blend designed for film applications.

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.

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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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