AbstractFormulas and operating conditions for the emulsion polymerization of ethylene are described. Stable latex products were obtained with a variety of anionic and nonionic emulsifiers, but for the majority of the work fatty acids or polyethoxylated alkyl phenols were used. Potassium persulfate was a satisfactory initiator at concentrations of 0.05–0.50 part per 100 parts of aqueous medium. Substitution of up to 15 of the water withtert‐butyl alcohol increased the latex particle size and the molecular weight of the polymer. Pressures of 3000–5000 psig and temperatures in the range of 80–100°C. provided practical polymerization rates and stable latex products that could be concentrated by evaporation to 40–50 solids. The concentrated products were fluid and stable during storage for one year or more. Polymer isolated from the latexes exhibited a tensile strength of 1100–1400 psi, an elongation of 30–50, and a Shore D har
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