Unitechem HALS 791
Unitechem HALS 791 is a synergistic blend of the polymeric HALS 944 and the monomeric HALS 770. It combines long-term stability with fast surface protection, which makes it a leading choice for PP thick sections such as automotive bumpers, fascias and garden furniture, and for PP tapes. Compare it with the other grades in our HALS UV stabilizer guide, or request the TDS and a quote.
| LS-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]} (Polymeric HALS, high MW) |
| LS-770 | Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (Monomeric HALS, low MW — CAS 52829-07-9) |
Key Features
|
High + Low MW HALS synergy — the polymeric LS-944 provides long-term thermal stability while the monomeric LS-770 delivers fast, efficient UV radical scavenging |
Excellent surface protection for PP thick sections — the leading choice for automotive bumpers, fascias, and garden furniture |
|
High stabilization efficiency in PP tapes — dual-component synergism outperforms single-component HALS at equivalent loadings |
Maximum UV + heat protection — simultaneously guards against UV radiation and long-term thermal oxidative degradation |
|
Low volatility and extraction resistance — excellent compatibility with PP, EPDM and their blends |
Odourless with high colour clarity — ideal for unpigmented and light-coloured polyolefin articles |
Applications
LS-791 is specifically engineered for polypropylene thick sections, PP tapes, and elastomer-modified PP blends (TPO). Primary application areas include PP, PP/EPDM, and PP/PE/EPDM blends used in demanding outdoor environments. Especially recommended for automotive exterior parts such as bumpers and fascias, as well as garden furniture, geotextiles, and woven bags requiring extended service life.
| Application | Substrate | Recommended Level |
|---|---|---|
| Thick sections | PP, PP/EPDM, TPO | 0.1 – 0.8% |
| Tapes | PP, HDPE | 0.1 – 0.8% |
| Automotive exterior | PP, TPO bumpers / fascias | 0.2 – 0.5% |
| Outdoor articles | PP / PE general outdoor | 0.1 – 0.5% |
PP Tape
PP / EPDM Blend
TPO
HDPE
EVA
SBS / SIS
TPE / TPV
|
🚗
Automotive |
🌿
Agriculture |
🏃
Sports & Outdoor |
📦
Packaging |
|
🏗️
Building & Construction |
🧵
Textiles & Fiber |
⚡
Wire & Cable |
🔋
Renewable Energy |
