STABILIZATION OPTIMIZATION OF AQUEOUS MONOMER SOLUTIONS IN OIL EMULSIONS USING THE COHESIVE ENERGY RATIO CONCEPT.

The Beerbower-Hill approach based on the Cohesive Energy Ratio concept (CER) has been applied in order to optimize the stabilization of Acrylamide-water or Acrylic Acid (pure and 80% neutralized)- water mixtures in cyclohexane emulsions.

Using surface tension measurements for the determination of the solubility parameter of the aqueous phase ( δ_w), it was found that the presence and amount of the water-soluble monomer could be accounted for the evaluation of the optimal HLB.

Predictions were compared to experimental HLB values obtained by using various blends of a low-HLB emulsifier (a sorbitan monooleate named MONTANE 80) and high-HLB emulsifiers (either a nonylphenolpolyoxyethylene 40 EO] or a pOE 20 EO] sorbitan trioleate, MONTANOX 85).