C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/323, 400/810
C08F 220/56 (2006.01) C08F 220/54 (2006.01) C08F 228/02 (2006.01)
Patent
CA 1328532
ABSTRACT OF THE DISCLOSURE A process is described for producing unique and novel sulfonate containing terpolymers of water soluble monomers with water insoluble monomers which are efficient viscosifiers of aqueous and brine media. The process relies on the complete solubilization of the water insoluble monomer by means of a dilute solution of a suitable water soluble surfactant. The type and concentration of surfactant are chosen to produce a clear, uniform, homogeneous aqueous disper- sion of the hydrophobic monomers in the presence of both nonionic and anionic water soluble monomers and, in addition, the reaction medium remains a clear, uniform, homogeneous mixture with no phase separation as the reaction proceeds to completion. The micelles formed by the surfactant are small aggregates, con- sisting of on the order of 50 to 200 molecules. They are stable toward phase separation and effectively disperse the water insoluble monomer on a very fine scale so that the terpolymerization is effected without the formation of latexes or fine particulates of water insoluble polymer.
548373
Bock Jan
Valint Paul L.
Borden Ladner Gervais Llp
Exxon Research & Engineering Company
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