Ciba® CHIMASSORB® 944 Oligomeric Hindered Amine Light Stabilizer (HALS) Characterization CHIMASSORB 944 is a high molecular weight hindered amine light stabilizer (HALS). It shows excellent compatibility, high resistance to extraction and low volatility. Chemical name 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) Structure CHIMASSORB 944 N H N N H N H N H N (CH2)6 N N N N H NH (CH2)6 NH tert. C8H17 n Molecular weight Mn = 2000-3100 g/mol Applications CHIMASSORB 944 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 is highly effective in polyacetals polyamides, polyurethanes, flexible and rigid PVC, as well as PVC blends and in certain styrenic elastomer and adhesive specialty applications. Features/benefits CHIMASSORB 944 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. Code: CHIMASSORB 944 FDL CHIMASSORB 944 LDProduct forms Appearance: White to slightly yellowish granules White to slightly yellowish low dust powder Guidelines for use Thick Sections* UV Stabilization of HDPE, LLDPE, LDPE and PP 0.05 - 0.6% Films* UV Stabilization of LLDPE and LDPE 0.10 - 1.0% Tapes UV Stabilization of PP and HDPE 0.20 - 0.8% Fibers UV Stabilization of PP 0.10 - 1.0%
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