CESA® Additive Masterbatches - Clariant

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Antioxidants Oxidation and heat aging are major causes of degradation of plastics. Exposure to heat and oxygen causes a chain reaction involving the formation of free-radicals, which inevitably leads to cleavage of the main chains in the polymer and degradation of the plastic. This is manifested in many different ways including loss of shine and transparency, yellowing, surface cracking and odors. Oxidation can also result in loss of mechanical properties such as impact resistance, elongation and tensile strength. CESA-nox antioxidant masterbatches are formulated to combat thermo-oxidative decomposition at every stage of the plastic life cycle, from manufacturing, drying and processing through end use. They are particularly suitable for use in LDPE, LLDPE, HDPE and PP. One example is CESA-nox 4201, a masterbatch based on a combination of antioxidants for long-term heat protection of polypropylene caused by severe outdoor and/or heat exposure. Antioxidant Efficiency 5 4.5 4 3.5 3 2 12 1 without antioxidant Number of extrusions 0.6% CESA-nox 4102 2 3 Multiple processing was performed by extrusion of LDPE at 240˚C, 0.6% CESA-nox 4102 addition rate. Heat Aging Test Heat aging resistance at 150°C (days) 150.0 100.0 50.0 0.0 1.2 2.5 CESA-nox PP 41412 (%) Test at 150°C on 1 mm thick homopolymer PP plaques Evaluation: embrittlement time (days) 5.0
Drying Agents & Compatibilizers Drying Agents CESA-dry desiccant masterbatches eliminate the need for pre-drying resin before processing, and also help to protect metal tools from oxidation. They are particularly recommended in applications where high moisture levels negatively influence processability. For example, CESA-dry MB 1, a concentrate of specific active substances in a polyethylene carrier, can be used to facilitate processing of recycled resins, resins containing biodegradable starch and other high-moisture-level polymers. It is also suitable for injection and blow molded polyolefins. Compatibilizers When resins and certain reinforcing materials are not compatible, the addition of an appropriate compatibilizing material may allow them to be blended or alloyed. CESA-mix compatibilizers bridge the gap between different resin chemistries, enabling them to form a homogeneous structure. 13
Page 1 and 2: Masterbatches Your Added Protection
Page 3 and 4: A Global Portfolio of Performance E
Page 5 and 6: HALS and UV absorbers are frequentl
Page 7 and 8: The most common flame retardants in
Page 9 and 10: Antifog Food packaging and horticul
Page 11 and 12: Infrared & Corrosion Inhibitors Inf
Page 13: Antibacterial Effect on Plastic Num
Page 17 and 18: Processing Aids, Mold Release, Clea
Page 19 and 20: CESA Additive Masterbatches Product

CESA® Additive Masterbatches - Clariant

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