Stabilizer microcrystalline waxes

Two types of stabilizers inhibit crack growth in rubbers microcrystalline waxes and alkylated phenylene diamines. A small quantity of the wax milled into a rubber will gradually diffuse to the surface where it will serve as a barrier impervious to ozone. A combination of wax and alkylated phenylene dicunine antiozonant is generally used for optimum protection. The exact function of antiozonant is still obscure but it is possible that it accelerates scission processes on the polymer surface producing a protective film of viscous products. 

Commercial polyolefins often contain additives such as colorants, flame retardants, antioxidants, light stabilizers, nucleating agents, antistatic agents, lubricants (microcrystalline waxes, hydrocarbon waxes, stearic acid, and metal stearates), and so on. These additives aid the processing and fabrication of products from polyolefins. Detailed treatments about specific polyolefins, polymerization systems/ mechanism/processes, structures, properties, processing, and applications may be found in References 2-9. 

Historically the first anticorrosion techniques to appear were combined films - paper and cardboard-based materials covered with paraffin, microcrystalline wax, synthetic latex or PE. These materials are accessible, cheap, rather strong, wear resistant, and display elasticity, vapor and light-impermeability, moisture resistance, shape stability, susceptibility to color... 

Figure 14 Stabilization of a microcrystalline wax color formation during oven aging at 177°C (350°F). 

Chem. Descrip. microcrystalline wax Uses Emulsifier, rheological control agent in lipstick, hair care Features Food grade inert superior color, UV stability Regulatory Meets DSP, BP, DAB, EP standards... 

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