Abstract:

Brominated Span 80, brominated Tween 80, brominated oleic acid, and brominated linoleic acid function as emulsifiers and weighting agents in castor oil-in-water emulsions and increase the sp. gr. of oil droplets. Stable emulsions are obtained at appropriate concns. of emulsifiers, and downward creaming (sedimentation) occurs when larger concns. of weighting agents-emulsifier are used. The efficiency of the weighting agent-emulsifier depends on the sp. gr., HLB value, and water soly. Brominated oleic and linoleic acids (in presence of triethanolamine) are the most efficient because they are hydrotropic and are adsorbed in the oil-water interface or dissolved in the oil. [on SciFinder(R)]