Irganox® B 561

Irganox® B 561 by BASF is a processing and long-term thermal stabilizer system designed for use with polyolefins and olefin-copolymers. It is a blend of 80% Irgafos® 168 and 20% Irganox® 1010. It maintains original melt flow and offers low color formation. Irgafos® 168, an organic phosphite of low volatility and particularly resistant to hydrolysis, protects the polymers which are prone to oxidation. Irganox® 1010, a hindered phenolic antioxidant, contributes synergistically to polymer stabilization during processing and provides long-term thermal stability by preventing thermo-oxidative degradation. Irganox® B 561 is suitable for polyethylene, polypropylene, polybutene and ethylene-vinyl acetate copolymers application. It is also used in engineering plastics, styrene homo- and copolymers, polyurethanes and elastomers. Recommended dosage level in polyolefins is 0.1-0.25%.