Protective waxes

Japan wax Protective coating of kernels from small shrubs (sumac plants, Rhus genus) growing in China or Japan Triacylglycerols, palmitin as major compound... 

Major uses for UV curing (room temperature) include use of flat stock-fillers in particle boards and hardwood flooring, and for high-gloss (no-wax) protective coatings for floor tiles, wood finishes, and other specialty uses. 

Plants produce wax that coats their leaves (top). The wax protects the leaves from drying out. The honeycomb of a beehive is constructed from beeswax (bottom). 

The properties of waxes are listed in Table 9.21. Wax protects rubber against static ozonolysis by forming a barrier on the surface. Wax migrates from the bulk of the rubber continuously, maintaining an equilibrium concentration at... 

Sodium phosphate dibasic anhydrous Sodium phosphate tribasic Sodium polymethacrylate Sodium silicate Sodium sulfate Sodium sulfate decahydrate Sorbitan stearate Tannic acid Tetrasodium EDTA water analysis Phenolsulfonic acid water barrier wax, night creams Stearyl methicone water barrier wax, protective lotions Stearyl methicone water barrier, antiperspirants Stearoxy dimethicone water barrier, balms Macadamia ternifolia seed oil water barrier, bar soaps Macadamia ternifolia seed oil water barrier, conditioners Macadamia ternifolia seed oil water barrier, cosmetics Macadamia ternifolia seed oil Stearoxy dimethicone... 

Figure 10.4 Protection schemes for self-healing catalysts, (a) Silica-coated, polymer-protected catalyst particles and (b) wax-protected catalyst particles.

Paraffin wax blend Paraffin waxes Petroleum waxes Protective waxes... 

The requirements for static ozone resistance vs. dynamic ozone resistance are very different, so that choiee of antiozonant depends greatly on the expected service of the rubber produet. Static protection is provided by petroleum waxes, usually paraffin and/or microcrystalline waxes. The waxes work by blooming to the rubber surface to form a physical barrier to ozone attack. The choice of wax or wax blend is based upon migration temperature where mobility and solubility of the wax in the rubber are balanced so that sufficient bloom occurs for optimum protection. Because the wax film is inextensible, it will rupture under deformation and expose the elastomer. Waxes protect only under static conditions. 

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