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Chimassorb® 944 FDL

Technical Datasheet | Supplied by BASF
Chimassorb® 944 FDL by BASF is a 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]]). It is a high molecular weight oligomeric hindered amine light stabilizer (HALS) and heat stabilizer. Shows excellent compatibility, good resistance to extraction and low volatility. Imparts excellent light stability to thin articles, particularly fibers and films. In thick cross sections it is specifically suitable for polyethylene articles. Chimassorb® 944 is highly effective as a long-term thermal stabilizer in thin and thick articles and shows good extraction resistance. Its areas of application include polyolefins (PP, PE), olefin copolymers such as EVA as well as blends of polypropylene with elastomers. In addition in certain instances Chimassorb® 944 FDL is highly effective in polyacetals, polyamides, polyurethanes, flexible and rigid PVC as well as PVC blends and in certain styrenic elastomer. Its recommended dosage is 0.05-1.4%.
Product Type
  • Light Stabilizers / UV Absorbers > HALS, Hindered Amines
  • Heat Stabilizers
Chemical Composition
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]])
CAS Number
71878-19-8/70624-18-9 (US)
Physical Form
White to slight yellowish
Product Status
Applications/ Recommended for
  • Other Thermoplastic > POM (Polyacetal)
  • PA, Nylon
  • PE
  • PP
  • PVC > PVC, flexible
  • PVC > PVC, rigid
  • Fibers/ Textiles/ Carpets > Fibers
  • Safety, regulation & environment > Low volatiles

Chimassorb® 944 FDL Properties


Value & Unit
Test Condition
Test Method
Melting range
100 - 135 °C
Flashpoint, ASTM D-93
> 150 °C
Specific gravity @ 20 °C
1.01 g/cm3

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