Abstract
Abstract The effects of solvent characteristics on viscosities of several synthetic rubber hydrocarbon solutions was determined. Normal and isoparaffins (Ce and C7) yielded lower viscosity solutions than naphthenes and aromatics at 10 weight per cent of solvent and 8 grams of rubber per 100 cm3 of solvent, concentrations of interest to rubber cement and adhesive manufacturers. Solubility varied markedly with elastomer and solvent. Butadiene acrylonitrile copolymer and ethylene propylcnc tcrpolymer were the least soluble; cis-polyisoprene, butyl rubbers, and ethylene propylene copolymer were soluble in all thinners. No general correlation was found on a solvent volume basis between solution viscosity and solvent viscosity or between relative viscosity and hydrocarbon type.
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