1. General Information

Chemical Name: Poly[[6-(1,1,3,3-tetramethylbutyl)amino-1,3,5-triazin-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]hexamethylene[(2,2,6,6-tetramethyl-4-piperidyl)imino]]
CAS No.: 71878-19-8
Molecular Formula: (C₃₅H₆₆N₈O₂)ₙ

2. Product Description

HALS 944 is a high-molecular-weight Hindered Amine Light Stabilizer (HALS). It is specifically designed to protect plastic products from ultraviolet (UV) radiation, preventing degradation processes such as aging, discoloration, and surface cracking when exposed to outdoor environments.

Performance: Compared to HALS 770, the 944 grade offers superior long-term stability, especially in thick-sectioned products or materials requiring extended outdoor durability.

3. Key Features

UV Protection: Effectively inhibits aging and color fading.
High Thermal Stability: Remains stable at high temperatures with negligible volatility during polymer processing.
Broad Compatibility: Compatible with a wide range of polymers including PE, PP, EVA, PS, PA, PU, and ABS.
Synergistic Effect: Can be combined with UV absorbers like UV 531, UV 326, or other stabilizers like HALS 770 to enhance overall protection.

4. Applications

Agriculture: Outdoor PE/PP films and greenhouse films.
Automotive & Electronics: Interior/exterior automotive parts and electronic components.
Consumer Goods: Plastic pipes, fibers, equipment housings, sheets, containers, and any outdoor products requiring high lightfastness.

5. Technical Specifications (Quick Info)

Appearance: White powder or granules.
Melting Point: 100 – 125°C.
Density: Approx. 1.03 g/cm³.
Volatility: Very low (ensuring the additive remains within the plastic matrix).

6. Recommended Dosage

Usage Rate: 0.1% – 1.0% by weight of the polymer (depending on the desired lifespan and environmental exposure conditions).

7. Storage & Handling

Storage: Keep in a cool, dry place away from direct sunlight to maintain the additive’s chemical activity.
Technical Advice: Practical trials are recommended to determine the optimal mixing ratio for specific base resins.