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Irgafos® 168
Hydrolytically stable phosphite processing stabilizer
CAS number 31570-04-4
Irgafos 168 is a hydrolytically stable phosphite processing stabilizer. As a secondary antioxidant, Irgafos 168 reacts during processing with hydroper oxides formed by autoxidation of polymers preventing process induced degradation and extending the performance of primary antioxidants.
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Product Detail


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Chemical nameCAS number
Tris(2,4-di-tert.-butylphenyl)phosphite31570-04-4
Molecular weightMelting range
646.9 g/mol183 – 186 °C
Specific gravity (20 °C)
1.03 g/ml
Application
The application range of Irgafos 168 – synergistically combined with other BASF anti-oxidants – comprises polyolefins and olefin-copolymers such as polyethylene (e. g. HDPE, LLDPE), polypropylene, polybutene and ethylene vinylacetate copolymers as well as polycarbonates and polyamides. The blends can also be used in polyesters, styrene homo- and copolymers, adhesives and natural and synthetic tackifier resins, elastomers such as BR, SEBS, SBS, and other organic substrates. Irgafos 168 blends can be used in combination with light stabilizers of the Uvinul®, Tinuvin® and Chimassorb® range.

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